From e16f200dc1d2f69efc78c7c55af0d7b410a981f9 Mon Sep 17 00:00:00 2001 From: Glenn Strauss Date: Tue, 5 Jul 2022 02:49:50 -0400 Subject: [PATCH 1/7] mbedtls: TLS/crypto option (initial port) Signed-off-by: Glenn Strauss --- hostapd/Makefile | 91 + hostapd/defconfig | 15 +- src/crypto/crypto_mbedtls.c | 4043 +++++++++++++++++ src/crypto/tls_mbedtls.c | 3313 ++++++++++++++ .../build/build-wpa_supplicant-mbedtls.config | 24 + tests/hwsim/example-hostapd.config | 4 + tests/hwsim/example-wpa_supplicant.config | 4 + wpa_supplicant/Makefile | 74 + wpa_supplicant/defconfig | 6 +- 9 files changed, 7571 insertions(+), 3 deletions(-) create mode 100644 src/crypto/crypto_mbedtls.c create mode 100644 src/crypto/tls_mbedtls.c create mode 100644 tests/build/build-wpa_supplicant-mbedtls.config --- a/hostapd/Makefile +++ b/hostapd/Makefile @@ -757,6 +757,40 @@ endif CFLAGS += -DTLS_DEFAULT_CIPHERS=\"$(CONFIG_TLS_DEFAULT_CIPHERS)\" endif +ifeq ($(CONFIG_TLS), mbedtls) +ifndef CONFIG_CRYPTO +CONFIG_CRYPTO=mbedtls +endif +ifdef TLS_FUNCS +OBJS += ../src/crypto/tls_mbedtls.o +LIBS += -lmbedtls +ifndef CONFIG_DPP +LIBS += -lmbedx509 +endif +endif +OBJS += ../src/crypto/crypto_$(CONFIG_CRYPTO).o +HOBJS += ../src/crypto/crypto_$(CONFIG_CRYPTO).o +SOBJS += ../src/crypto/crypto_$(CONFIG_CRYPTO).o +ifdef NEED_FIPS186_2_PRF +OBJS += ../src/crypto/fips_prf_internal.o +SHA1OBJS += ../src/crypto/sha1-internal.o +endif +ifeq ($(CONFIG_CRYPTO), mbedtls) +ifdef CONFIG_DPP +LIBS += -lmbedx509 +LIBS_h += -lmbedx509 +LIBS_n += -lmbedx509 +LIBS_s += -lmbedx509 +endif +LIBS += -lmbedcrypto +LIBS_h += -lmbedcrypto +LIBS_n += -lmbedcrypto +LIBS_s += -lmbedcrypto +# XXX: create a config option? +CFLAGS += -DCRYPTO_RSA_OAEP_SHA256 +endif +endif + ifeq ($(CONFIG_TLS), gnutls) ifndef CONFIG_CRYPTO # default to libgcrypt @@ -936,9 +970,11 @@ endif ifneq ($(CONFIG_TLS), openssl) ifneq ($(CONFIG_TLS), wolfssl) +ifneq ($(CONFIG_TLS), mbedtls) AESOBJS += ../src/crypto/aes-wrap.o endif endif +endif ifdef NEED_AES_EAX AESOBJS += ../src/crypto/aes-eax.o NEED_AES_CTR=y @@ -948,38 +984,48 @@ AESOBJS += ../src/crypto/aes-siv.o NEED_AES_CTR=y endif ifdef NEED_AES_CTR +ifneq ($(CONFIG_TLS), mbedtls) AESOBJS += ../src/crypto/aes-ctr.o endif +endif ifdef NEED_AES_ENCBLOCK +ifneq ($(CONFIG_TLS), mbedtls) AESOBJS += ../src/crypto/aes-encblock.o endif +endif ifneq ($(CONFIG_TLS), openssl) ifneq ($(CONFIG_TLS), linux) ifneq ($(CONFIG_TLS), wolfssl) +ifneq ($(CONFIG_TLS), mbedtls) AESOBJS += ../src/crypto/aes-omac1.o endif endif endif +endif ifdef NEED_AES_UNWRAP ifneq ($(CONFIG_TLS), openssl) ifneq ($(CONFIG_TLS), linux) ifneq ($(CONFIG_TLS), wolfssl) +ifneq ($(CONFIG_TLS), mbedtls) NEED_AES_DEC=y AESOBJS += ../src/crypto/aes-unwrap.o endif endif endif endif +endif ifdef NEED_AES_CBC NEED_AES_DEC=y ifneq ($(CONFIG_TLS), openssl) ifneq ($(CONFIG_TLS), linux) ifneq ($(CONFIG_TLS), wolfssl) +ifneq ($(CONFIG_TLS), mbedtls) AESOBJS += ../src/crypto/aes-cbc.o endif endif endif endif +endif ifdef NEED_AES_DEC ifdef CONFIG_INTERNAL_AES AESOBJS += ../src/crypto/aes-internal-dec.o @@ -994,12 +1040,16 @@ ifneq ($(CONFIG_TLS), openssl) ifneq ($(CONFIG_TLS), linux) ifneq ($(CONFIG_TLS), gnutls) ifneq ($(CONFIG_TLS), wolfssl) +ifneq ($(CONFIG_TLS), mbedtls) SHA1OBJS += ../src/crypto/sha1.o endif endif endif endif +endif +ifneq ($(CONFIG_TLS), mbedtls) SHA1OBJS += ../src/crypto/sha1-prf.o +endif ifdef CONFIG_INTERNAL_SHA1 SHA1OBJS += ../src/crypto/sha1-internal.o ifdef NEED_FIPS186_2_PRF @@ -1008,16 +1058,22 @@ endif endif ifneq ($(CONFIG_TLS), openssl) ifneq ($(CONFIG_TLS), wolfssl) +ifneq ($(CONFIG_TLS), mbedtls) SHA1OBJS += ../src/crypto/sha1-pbkdf2.o endif endif +endif ifdef NEED_T_PRF +ifneq ($(CONFIG_TLS), mbedtls) SHA1OBJS += ../src/crypto/sha1-tprf.o endif +endif ifdef NEED_TLS_PRF +ifneq ($(CONFIG_TLS), mbedtls) SHA1OBJS += ../src/crypto/sha1-tlsprf.o endif endif +endif ifdef NEED_SHA1 OBJS += $(SHA1OBJS) @@ -1027,11 +1083,13 @@ ifneq ($(CONFIG_TLS), openssl) ifneq ($(CONFIG_TLS), linux) ifneq ($(CONFIG_TLS), gnutls) ifneq ($(CONFIG_TLS), wolfssl) +ifneq ($(CONFIG_TLS), mbedtls) OBJS += ../src/crypto/md5.o endif endif endif endif +endif ifdef NEED_MD5 ifdef CONFIG_INTERNAL_MD5 @@ -1070,56 +1128,81 @@ ifneq ($(CONFIG_TLS), openssl) ifneq ($(CONFIG_TLS), linux) ifneq ($(CONFIG_TLS), gnutls) ifneq ($(CONFIG_TLS), wolfssl) +ifneq ($(CONFIG_TLS), mbedtls) OBJS += ../src/crypto/sha256.o endif endif endif endif +endif +ifneq ($(CONFIG_TLS), mbedtls) OBJS += ../src/crypto/sha256-prf.o +endif ifdef CONFIG_INTERNAL_SHA256 OBJS += ../src/crypto/sha256-internal.o endif ifdef NEED_TLS_PRF_SHA256 +ifneq ($(CONFIG_TLS), mbedtls) OBJS += ../src/crypto/sha256-tlsprf.o endif +endif ifdef NEED_TLS_PRF_SHA384 +ifneq ($(CONFIG_TLS), mbedtls) OBJS += ../src/crypto/sha384-tlsprf.o endif +endif ifdef NEED_HMAC_SHA256_KDF +CFLAGS += -DCONFIG_HMAC_SHA256_KDF +ifneq ($(CONFIG_TLS), mbedtls) OBJS += ../src/crypto/sha256-kdf.o endif +endif ifdef NEED_HMAC_SHA384_KDF +CFLAGS += -DCONFIG_HMAC_SHA384_KDF +ifneq ($(CONFIG_TLS), mbedtls) OBJS += ../src/crypto/sha384-kdf.o endif +endif ifdef NEED_HMAC_SHA512_KDF +CFLAGS += -DCONFIG_HMAC_SHA512_KDF +ifneq ($(CONFIG_TLS), mbedtls) OBJS += ../src/crypto/sha512-kdf.o endif +endif ifdef NEED_SHA384 CFLAGS += -DCONFIG_SHA384 ifneq ($(CONFIG_TLS), openssl) ifneq ($(CONFIG_TLS), linux) ifneq ($(CONFIG_TLS), gnutls) ifneq ($(CONFIG_TLS), wolfssl) +ifneq ($(CONFIG_TLS), mbedtls) OBJS += ../src/crypto/sha384.o endif endif endif endif +endif +ifneq ($(CONFIG_TLS), mbedtls) OBJS += ../src/crypto/sha384-prf.o endif +endif ifdef NEED_SHA512 CFLAGS += -DCONFIG_SHA512 ifneq ($(CONFIG_TLS), openssl) ifneq ($(CONFIG_TLS), linux) ifneq ($(CONFIG_TLS), gnutls) ifneq ($(CONFIG_TLS), wolfssl) +ifneq ($(CONFIG_TLS), mbedtls) OBJS += ../src/crypto/sha512.o endif endif endif endif +endif +ifneq ($(CONFIG_TLS), mbedtls) OBJS += ../src/crypto/sha512-prf.o endif +endif ifdef CONFIG_INTERNAL_SHA384 CFLAGS += -DCONFIG_INTERNAL_SHA384 @@ -1164,11 +1247,13 @@ HOBJS += $(SHA1OBJS) ifneq ($(CONFIG_TLS), openssl) ifneq ($(CONFIG_TLS), linux) ifneq ($(CONFIG_TLS), wolfssl) +ifneq ($(CONFIG_TLS), mbedtls) HOBJS += ../src/crypto/md5.o endif endif endif endif +endif ifdef CONFIG_RADIUS_SERVER CFLAGS += -DRADIUS_SERVER @@ -1341,7 +1426,9 @@ NOBJS += ../src/utils/trace.o endif HOBJS += hlr_auc_gw.o ../src/utils/common.o ../src/utils/wpa_debug.o ../src/utils/os_$(CONFIG_OS).o ../src/utils/wpabuf.o ../src/crypto/milenage.o +ifneq ($(CONFIG_TLS), mbedtls) HOBJS += ../src/crypto/aes-encblock.o +endif ifdef CONFIG_INTERNAL_AES HOBJS += ../src/crypto/aes-internal.o HOBJS += ../src/crypto/aes-internal-enc.o @@ -1364,13 +1451,17 @@ SOBJS += ../src/common/sae.o SOBJS += ../src/common/sae_pk.o SOBJS += ../src/common/dragonfly.o SOBJS += $(AESOBJS) +ifneq ($(CONFIG_TLS), mbedtls) SOBJS += ../src/crypto/sha256-prf.o SOBJS += ../src/crypto/sha384-prf.o SOBJS += ../src/crypto/sha512-prf.o +endif SOBJS += ../src/crypto/dh_groups.o +ifneq ($(CONFIG_TLS), mbedtls) SOBJS += ../src/crypto/sha256-kdf.o SOBJS += ../src/crypto/sha384-kdf.o SOBJS += ../src/crypto/sha512-kdf.o +endif _OBJS_VAR := NOBJS include ../src/objs.mk --- a/hostapd/defconfig +++ b/hostapd/defconfig @@ -6,9 +6,21 @@ # just setting VARIABLE=n is not disabling that variable. # # This file is included in Makefile, so variables like CFLAGS and LIBS can also -# be modified from here. In most cass, these lines should use += in order not +# be modified from here. In most cases, these lines should use += in order not # to override previous values of the variables. + +# Uncomment following two lines and fix the paths if you have installed TLS +# libraries in a non-default location +#CFLAGS += -I/usr/local/openssl/include +#LIBS += -L/usr/local/openssl/lib + +# Some Red Hat versions seem to include kerberos header files from OpenSSL, but +# the kerberos files are not in the default include path. Following line can be +# used to fix build issues on such systems (krb5.h not found). +#CFLAGS += -I/usr/include/kerberos + + # Driver interface for Host AP driver CONFIG_DRIVER_HOSTAP=y @@ -281,6 +293,7 @@ CONFIG_IPV6=y # openssl = OpenSSL (default) # gnutls = GnuTLS # internal = Internal TLSv1 implementation (experimental) +# mbedtls = mbed TLS # linux = Linux kernel AF_ALG and internal TLSv1 implementation (experimental) # none = Empty template #CONFIG_TLS=openssl --- /dev/null +++ b/src/crypto/crypto_mbedtls.c @@ -0,0 +1,4043 @@ +/* + * crypto wrapper functions for mbed TLS + * + * SPDX-FileCopyrightText: 2022 Glenn Strauss + * SPDX-License-Identifier: BSD-3-Clause + */ + +#include "utils/includes.h" +#include "utils/common.h" + +#include +#include +#include +#include /* mbedtls_platform_zeroize() */ +#include +#include +#include +#include +#include +#include +#include +#include + +#ifndef MBEDTLS_PRIVATE +#define MBEDTLS_PRIVATE(x) x +#endif + +/* hostapd/wpa_supplicant provides forced_memzero(), + * but prefer mbedtls_platform_zeroize() */ +#define forced_memzero(ptr,sz) mbedtls_platform_zeroize(ptr,sz) + +#ifndef __has_attribute +#define __has_attribute(x) 0 +#endif + +#ifndef __GNUC_PREREQ +#define __GNUC_PREREQ(maj,min) 0 +#endif + +#ifndef __attribute_cold__ +#if __has_attribute(cold) \ + || __GNUC_PREREQ(4,3) +#define __attribute_cold__ __attribute__((__cold__)) +#else +#define __attribute_cold__ +#endif +#endif + +#ifndef __attribute_noinline__ +#if __has_attribute(noinline) \ + || __GNUC_PREREQ(3,1) +#define __attribute_noinline__ __attribute__((__noinline__)) +#else +#define __attribute_noinline__ +#endif +#endif + +#include "crypto.h" +#include "aes_wrap.h" +#include "aes.h" +#include "md5.h" +#include "sha1.h" +#include "sha256.h" +#include "sha384.h" +#include "sha512.h" + + +/* + * selective code inclusion based on preprocessor defines + * + * future: additional code could be wrapped with preprocessor checks if + * wpa_supplicant/Makefile and hostap/Makefile were more consistent with + * setting preprocessor defines for named groups of functionality + */ + +#if defined(CONFIG_FIPS) +#undef MBEDTLS_MD4_C /* omit md4_vector() */ +#undef MBEDTLS_MD5_C /* omit md5_vector() hmac_md5_vector() hmac_md5() */ +#undef MBEDTLS_DES_C /* omit des_encrypt() */ +#undef MBEDTLS_NIST_KW_C /* omit aes_wrap() aes_unwrap() */ +#define CRYPTO_MBEDTLS_CONFIG_FIPS +#endif + +#if !defined(CONFIG_FIPS) +#if defined(EAP_PWD) \ + || defined(EAP_LEAP) || defined(EAP_LEAP_DYNAMIC) \ + || defined(EAP_TTLS) || defined(EAP_TTLS_DYNAMIC) \ + || defined(EAP_MSCHAPv2) || defined(EAP_MSCHAPv2_DYNAMIC) \ + || defined(EAP_SERVER_MSCHAPV2) +#ifndef MBEDTLS_MD4_C /* (MD4 not in mbedtls 3.x) */ +#include "md4-internal.c"/* pull in hostap local implementation */ +#endif /* md4_vector() */ +#else +#undef MBEDTLS_MD4_C /* omit md4_vector() */ +#endif +#endif + +#if !defined(CONFIG_NO_RC4) && !defined(CONFIG_NO_WPA) +#ifndef MBEDTLS_ARC4_C /* (RC4 not in mbedtls 3.x) */ +#include "rc4.c" /* pull in hostap local implementation */ +#endif /* rc4_skip() */ +#else +#undef MBEDTLS_ARC4_C /* omit rc4_skip() */ +#endif + +#if defined(CONFIG_MACSEC) \ + || defined(CONFIG_NO_RADIUS) \ + || defined(CONFIG_IEEE80211R) \ + || defined(EAP_SERVER_FAST) \ + || defined(EAP_SERVER_TEAP) \ + || !defined(CONFIG_NO_WPA) + /* aes_wrap() aes_unwrap() */ +#else +#undef MBEDTLS_NIST_KW_C /* omit aes_wrap() aes_unwrap() */ +#endif + +#if !defined(CONFIG_SHA256) +#undef MBEDTLS_SHA256_C +#endif + +#if !defined(CONFIG_SHA384) && !defined(CONFIG_SHA512) +#undef MBEDTLS_SHA512_C +#endif + +#if defined(CONFIG_HMAC_SHA256_KDF) +#define CRYPTO_MBEDTLS_HMAC_KDF_SHA256 +#endif +#if defined(CONFIG_HMAC_SHA384_KDF) +#define CRYPTO_MBEDTLS_HMAC_KDF_SHA384 +#endif +#if defined(CONFIG_HMAC_SHA512_KDF) +#define CRYPTO_MBEDTLS_HMAC_KDF_SHA512 +#endif + +#if defined(EAP_FAST) || defined(EAP_FAST_DYNAMIC) || defined(EAP_SERVER_FAST) \ + || defined(EAP_TEAP) || defined(EAP_TEAP_DYNAMIC) || defined(EAP_SERVER_FAST) +#define CRYPTO_MBEDTLS_SHA1_T_PRF +#endif + +#if defined(CONFIG_DES) +#define CRYPTO_MBEDTLS_DES_ENCRYPT +#endif /* des_encrypt() */ + +#if !defined(CONFIG_NO_PBKDF2) +#define CRYPTO_MBEDTLS_PBKDF2_SHA1 +#endif /* pbkdf2_sha1() */ + +#if defined(EAP_IKEV2) \ + || defined(EAP_IKEV2_DYNAMIC) \ + || defined(EAP_SERVER_IKEV2) /* CONFIG_EAP_IKEV2=y */ +#define CRYPTO_MBEDTLS_CRYPTO_CIPHER +#endif /* crypto_cipher_*() */ + +#if defined(EAP_PWD) || defined(EAP_SERVER_PWD) /* CONFIG_EAP_PWD=y */ +#define CRYPTO_MBEDTLS_CRYPTO_HASH +#endif /* crypto_hash_*() */ + +#if defined(EAP_PWD) || defined(EAP_SERVER_PWD) /* CONFIG_EAP_PWD=y */ \ + || defined(CONFIG_SAE) /* CONFIG_SAE=y */ +#define CRYPTO_MBEDTLS_CRYPTO_BIGNUM +#endif /* crypto_bignum_*() */ + +#if defined(EAP_PWD) /* CONFIG_EAP_PWD=y */ \ + || defined(EAP_EKE) /* CONFIG_EAP_EKE=y */ \ + || defined(EAP_EKE_DYNAMIC) /* CONFIG_EAP_EKE=y */ \ + || defined(EAP_SERVER_EKE) /* CONFIG_EAP_EKE=y */ \ + || defined(EAP_IKEV2) /* CONFIG_EAP_IKEV2y */ \ + || defined(EAP_IKEV2_DYNAMIC)/* CONFIG_EAP_IKEV2=y */ \ + || defined(EAP_SERVER_IKEV2) /* CONFIG_EAP_IKEV2=y */ \ + || defined(CONFIG_SAE) /* CONFIG_SAE=y */ \ + || defined(CONFIG_WPS) /* CONFIG_WPS=y */ +#define CRYPTO_MBEDTLS_CRYPTO_DH +#if defined(CONFIG_WPS_NFC) +#define CRYPTO_MBEDTLS_DH5_INIT_FIXED +#endif /* dh5_init_fixed() */ +#endif /* crypto_dh_*() */ + +#if !defined(CONFIG_NO_WPA) /* CONFIG_NO_WPA= */ +#define CRYPTO_MBEDTLS_CRYPTO_ECDH +#endif /* crypto_ecdh_*() */ + +#if defined(CONFIG_ECC) +#define CRYPTO_MBEDTLS_CRYPTO_BIGNUM +#define CRYPTO_MBEDTLS_CRYPTO_EC +#endif /* crypto_ec_*() crypto_ec_key_*() */ + +#if defined(CONFIG_DPP) /* CONFIG_DPP=y */ +#define CRYPTO_MBEDTLS_CRYPTO_EC_DPP /* extra for DPP */ +#define CRYPTO_MBEDTLS_CRYPTO_CSR +#endif /* crypto_csr_*() */ + +#if defined(CONFIG_DPP3) /* CONFIG_DPP3=y */ +#define CRYPTO_MBEDTLS_CRYPTO_HPKE +#endif + +#if defined(CONFIG_DPP2) /* CONFIG_DPP2=y */ +#define CRYPTO_MBEDTLS_CRYPTO_PKCS7 +#endif /* crypto_pkcs7_*() */ + +#if defined(EAP_SIM) || defined(EAP_SIM_DYNAMIC) || defined(EAP_SERVER_SIM) \ + || defined(EAP_AKA) || defined(EAP_AKA_DYNAMIC) || defined(EAP_SERVER_AKA) \ + || defined(CONFIG_AP) || defined(HOSTAPD) +/* CONFIG_EAP_SIM=y CONFIG_EAP_AKA=y CONFIG_AP=y HOSTAPD */ +#if defined(CRYPTO_RSA_OAEP_SHA256) +#define CRYPTO_MBEDTLS_CRYPTO_RSA +#endif +#endif /* crypto_rsa_*() */ + + +static int ctr_drbg_init_state; +static mbedtls_ctr_drbg_context ctr_drbg; +static mbedtls_entropy_context entropy; + +#ifdef CRYPTO_MBEDTLS_CRYPTO_BIGNUM +#include +static mbedtls_mpi mpi_sw_A; +#endif + +__attribute_cold__ +__attribute_noinline__ +static mbedtls_ctr_drbg_context * ctr_drbg_init(void) +{ + mbedtls_ctr_drbg_init(&ctr_drbg); + mbedtls_entropy_init(&entropy); + if (mbedtls_ctr_drbg_seed(&ctr_drbg, mbedtls_entropy_func, &entropy, + NULL, 0)) { + wpa_printf(MSG_ERROR, "Init of random number generator failed"); + /* XXX: abort? */ + } + else + ctr_drbg_init_state = 1; + + return &ctr_drbg; +} + +__attribute_cold__ +void crypto_unload(void) +{ + if (ctr_drbg_init_state) { + mbedtls_ctr_drbg_free(&ctr_drbg); + mbedtls_entropy_free(&entropy); + #ifdef CRYPTO_MBEDTLS_CRYPTO_BIGNUM + mbedtls_mpi_free(&mpi_sw_A); + #endif + ctr_drbg_init_state = 0; + } +} + +/* init ctr_drbg on first use + * crypto_global_init() and crypto_global_deinit() are not available here + * (available only when CONFIG_TLS=internal, which is not CONFIG_TLS=mbedtls) */ +mbedtls_ctr_drbg_context * crypto_mbedtls_ctr_drbg(void); /*(not in header)*/ +inline +mbedtls_ctr_drbg_context * crypto_mbedtls_ctr_drbg(void) +{ + return ctr_drbg_init_state ? &ctr_drbg : ctr_drbg_init(); +} + +#ifdef CRYPTO_MBEDTLS_CONFIG_FIPS +int crypto_get_random(void *buf, size_t len) +{ + return mbedtls_ctr_drbg_random(crypto_mbedtls_ctr_drbg(),buf,len) ? -1 : 0; +} +#endif + + +#if 1 + +/* tradeoff: slightly smaller code size here at cost of slight increase + * in instructions and function calls at runtime versus the expanded + * per-message-digest code that follows in #else (~0.5 kib .text larger) */ + +__attribute_noinline__ +static int md_vector(size_t num_elem, const u8 *addr[], const size_t *len, + u8 *mac, mbedtls_md_type_t md_type) +{ + mbedtls_md_context_t ctx; + mbedtls_md_init(&ctx); + if (mbedtls_md_setup(&ctx, mbedtls_md_info_from_type(md_type), 0) != 0){ + mbedtls_md_free(&ctx); + return -1; + } + mbedtls_md_starts(&ctx); + for (size_t i = 0; i < num_elem; ++i) + mbedtls_md_update(&ctx, addr[i], len[i]); + mbedtls_md_finish(&ctx, mac); + mbedtls_md_free(&ctx); + return 0; +} + +#ifdef MBEDTLS_SHA512_C +int sha512_vector(size_t num_elem, const u8 *addr[], const size_t *len, u8 *mac) +{ + return md_vector(num_elem, addr, len, mac, MBEDTLS_MD_SHA512); +} + +int sha384_vector(size_t num_elem, const u8 *addr[], const size_t *len, u8 *mac) +{ + return md_vector(num_elem, addr, len, mac, MBEDTLS_MD_SHA384); +} +#endif + +#ifdef MBEDTLS_SHA256_C +int sha256_vector(size_t num_elem, const u8 *addr[], const size_t *len, u8 *mac) +{ + return md_vector(num_elem, addr, len, mac, MBEDTLS_MD_SHA256); +} +#endif + +#ifdef MBEDTLS_SHA1_C +int sha1_vector(size_t num_elem, const u8 *addr[], const size_t *len, u8 *mac) +{ + return md_vector(num_elem, addr, len, mac, MBEDTLS_MD_SHA1); +} +#endif + +#ifdef MBEDTLS_MD5_C +int md5_vector(size_t num_elem, const u8 *addr[], const size_t *len, u8 *mac) +{ + return md_vector(num_elem, addr, len, mac, MBEDTLS_MD_MD5); +} +#endif + +#ifdef MBEDTLS_MD4_C +#include +int md4_vector(size_t num_elem, const u8 *addr[], const size_t *len, u8 *mac) +{ + return md_vector(num_elem, addr, len, mac, MBEDTLS_MD_MD4); +} +#endif + +#else /* expanded per-message-digest functions */ + +#ifdef MBEDTLS_SHA512_C +#include +__attribute_noinline__ +static int sha384_512_vector(size_t num_elem, const u8 *addr[], + const size_t *len, u8 *mac, int is384) +{ + struct mbedtls_sha512_context ctx; + mbedtls_sha512_init(&ctx); + #if MBEDTLS_VERSION_MAJOR >= 3 + mbedtls_sha512_starts(&ctx, is384); + for (size_t i = 0; i < num_elem; ++i) + mbedtls_sha512_update(&ctx, addr[i], len[i]); + mbedtls_sha512_finish(&ctx, mac); + #else + mbedtls_sha512_starts_ret(&ctx, is384); + for (size_t i = 0; i < num_elem; ++i) + mbedtls_sha512_update_ret(&ctx, addr[i], len[i]); + mbedtls_sha512_finish_ret(&ctx, mac); + #endif + mbedtls_sha512_free(&ctx); + return 0; +} + +int sha512_vector(size_t num_elem, const u8 *addr[], const size_t *len, u8 *mac) +{ + return sha384_512_vector(num_elem, addr, len, mac, 0); +} + +int sha384_vector(size_t num_elem, const u8 *addr[], const size_t *len, u8 *mac) +{ + return sha384_512_vector(num_elem, addr, len, mac, 1); +} +#endif + +#ifdef MBEDTLS_SHA256_C +#include +int sha256_vector(size_t num_elem, const u8 *addr[], const size_t *len, u8 *mac) +{ + struct mbedtls_sha256_context ctx; + mbedtls_sha256_init(&ctx); + #if MBEDTLS_VERSION_MAJOR >= 3 + mbedtls_sha256_starts(&ctx, 0); + for (size_t i = 0; i < num_elem; ++i) + mbedtls_sha256_update(&ctx, addr[i], len[i]); + mbedtls_sha256_finish(&ctx, mac); + #else + mbedtls_sha256_starts_ret(&ctx, 0); + for (size_t i = 0; i < num_elem; ++i) + mbedtls_sha256_update_ret(&ctx, addr[i], len[i]); + mbedtls_sha256_finish_ret(&ctx, mac); + #endif + mbedtls_sha256_free(&ctx); + return 0; +} +#endif + +#ifdef MBEDTLS_SHA1_C +#include +int sha1_vector(size_t num_elem, const u8 *addr[], const size_t *len, u8 *mac) +{ + struct mbedtls_sha1_context ctx; + mbedtls_sha1_init(&ctx); + #if MBEDTLS_VERSION_MAJOR >= 3 + mbedtls_sha1_starts(&ctx); + for (size_t i = 0; i < num_elem; ++i) + mbedtls_sha1_update(&ctx, addr[i], len[i]); + mbedtls_sha1_finish(&ctx, mac); + #else + mbedtls_sha1_starts_ret(&ctx); + for (size_t i = 0; i < num_elem; ++i) + mbedtls_sha1_update_ret(&ctx, addr[i], len[i]); + mbedtls_sha1_finish_ret(&ctx, mac); + #endif + mbedtls_sha1_free(&ctx); + return 0; +} +#endif + +#ifdef MBEDTLS_MD5_C +#include +int md5_vector(size_t num_elem, const u8 *addr[], const size_t *len, u8 *mac) +{ + struct mbedtls_md5_context ctx; + mbedtls_md5_init(&ctx); + #if MBEDTLS_VERSION_MAJOR >= 3 + mbedtls_md5_starts(&ctx); + for (size_t i = 0; i < num_elem; ++i) + mbedtls_md5_update(&ctx, addr[i], len[i]); + mbedtls_md5_finish(&ctx, mac); + #else + mbedtls_md5_starts_ret(&ctx); + for (size_t i = 0; i < num_elem; ++i) + mbedtls_md5_update_ret(&ctx, addr[i], len[i]); + mbedtls_md5_finish_ret(&ctx, mac); + #endif + mbedtls_md5_free(&ctx); + return 0; +} +#endif + +#ifdef MBEDTLS_MD4_C +#include +int md4_vector(size_t num_elem, const u8 *addr[], const size_t *len, u8 *mac) +{ + struct mbedtls_md4_context ctx; + mbedtls_md4_init(&ctx); + mbedtls_md4_starts_ret(&ctx); + for (size_t i = 0; i < num_elem; ++i) + mbedtls_md4_update_ret(&ctx, addr[i], len[i]); + mbedtls_md4_finish_ret(&ctx, mac); + mbedtls_md4_free(&ctx); + return 0; +} +#endif + +#endif /* expanded per-message-digest functions */ + + +__attribute_noinline__ +static int hmac_vector(const u8 *key, size_t key_len, size_t num_elem, + const u8 *addr[], const size_t *len, u8 *mac, + mbedtls_md_type_t md_type) +{ + mbedtls_md_context_t ctx; + mbedtls_md_init(&ctx); + if (mbedtls_md_setup(&ctx, mbedtls_md_info_from_type(md_type), 1) != 0){ + mbedtls_md_free(&ctx); + return -1; + } + mbedtls_md_hmac_starts(&ctx, key, key_len); + for (size_t i = 0; i < num_elem; ++i) + mbedtls_md_hmac_update(&ctx, addr[i], len[i]); + mbedtls_md_hmac_finish(&ctx, mac); + mbedtls_md_free(&ctx); + return 0; +} + +#ifdef MBEDTLS_SHA512_C +int hmac_sha512_vector(const u8 *key, size_t key_len, size_t num_elem, + const u8 *addr[], const size_t *len, u8 *mac) +{ + return hmac_vector(key, key_len, num_elem, addr, len, mac, + MBEDTLS_MD_SHA512); +} + +int hmac_sha512(const u8 *key, size_t key_len, const u8 *data, size_t data_len, + u8 *mac) +{ + return hmac_vector(key, key_len, 1, &data, &data_len, mac, + MBEDTLS_MD_SHA512); +} + +int hmac_sha384_vector(const u8 *key, size_t key_len, size_t num_elem, + const u8 *addr[], const size_t *len, u8 *mac) +{ + return hmac_vector(key, key_len, num_elem, addr, len, mac, + MBEDTLS_MD_SHA384); +} + +int hmac_sha384(const u8 *key, size_t key_len, const u8 *data, size_t data_len, + u8 *mac) +{ + return hmac_vector(key, key_len, 1, &data, &data_len, mac, + MBEDTLS_MD_SHA384); +} +#endif + +#ifdef MBEDTLS_SHA256_C +int hmac_sha256_vector(const u8 *key, size_t key_len, size_t num_elem, + const u8 *addr[], const size_t *len, u8 *mac) +{ + return hmac_vector(key, key_len, num_elem, addr, len, mac, + MBEDTLS_MD_SHA256); +} + +int hmac_sha256(const u8 *key, size_t key_len, const u8 *data, size_t data_len, + u8 *mac) +{ + return hmac_vector(key, key_len, 1, &data, &data_len, mac, + MBEDTLS_MD_SHA256); +} +#endif + +#ifdef MBEDTLS_SHA1_C +int hmac_sha1_vector(const u8 *key, size_t key_len, size_t num_elem, + const u8 *addr[], const size_t *len, u8 *mac) +{ + return hmac_vector(key, key_len, num_elem, addr, len, mac, + MBEDTLS_MD_SHA1); +} + +int hmac_sha1(const u8 *key, size_t key_len, const u8 *data, size_t data_len, + u8 *mac) +{ + return hmac_vector(key, key_len, 1, &data, &data_len, mac, + MBEDTLS_MD_SHA1); +} +#endif + +#ifdef MBEDTLS_MD5_C +int hmac_md5_vector(const u8 *key, size_t key_len, size_t num_elem, + const u8 *addr[], const size_t *len, u8 *mac) +{ + return hmac_vector(key, key_len, num_elem, addr, len, mac, + MBEDTLS_MD_MD5); +} + +int hmac_md5(const u8 *key, size_t key_len, const u8 *data, size_t data_len, + u8 *mac) +{ + return hmac_vector(key, key_len, 1, &data, &data_len, mac, + MBEDTLS_MD_MD5); +} +#endif + + +#if defined(MBEDTLS_SHA256_C) || defined(MBEDTLS_SHA512_C) + +#if defined(CRYPTO_MBEDTLS_HMAC_KDF_SHA256) \ + || defined(CRYPTO_MBEDTLS_HMAC_KDF_SHA384) \ + || defined(CRYPTO_MBEDTLS_HMAC_KDF_SHA512) + +#include + +/* sha256-kdf.c sha384-kdf.c sha512-kdf.c */ + +/* HMAC-SHA256 KDF (RFC 5295) and HKDF-Expand(SHA256) (RFC 5869) */ +/* HMAC-SHA384 KDF (RFC 5295) and HKDF-Expand(SHA384) (RFC 5869) */ +/* HMAC-SHA512 KDF (RFC 5295) and HKDF-Expand(SHA512) (RFC 5869) */ +__attribute_noinline__ +static int hmac_kdf_expand(const u8 *prk, size_t prk_len, + const char *label, const u8 *info, size_t info_len, + u8 *okm, size_t okm_len, mbedtls_md_type_t md_type) +{ + const mbedtls_md_info_t *md_info = mbedtls_md_info_from_type(md_type); + #ifdef MBEDTLS_HKDF_C + if (label == NULL) /* RFC 5869 HKDF-Expand when (label == NULL) */ + return mbedtls_hkdf_expand(md_info, prk, prk_len, info, + info_len, okm, okm_len) ? -1 : 0; + #endif + + const size_t mac_len = mbedtls_md_get_size(md_info); + /* okm_len must not exceed 255 times hash len (RFC 5869 Section 2.3) */ + if (okm_len > ((mac_len << 8) - mac_len)) + return -1; + + mbedtls_md_context_t ctx; + mbedtls_md_init(&ctx); + if (mbedtls_md_setup(&ctx, md_info, 1) != 0) { + mbedtls_md_free(&ctx); + return -1; + } + mbedtls_md_hmac_starts(&ctx, prk, prk_len); + + u8 iter = 1; + const u8 *addr[4] = { okm, (const u8 *)label, info, &iter }; + size_t len[4] = { 0, label ? os_strlen(label)+1 : 0, info_len, 1 }; + + for (; okm_len >= mac_len; okm_len -= mac_len, ++iter) { + for (size_t i = 0; i < ARRAY_SIZE(addr); ++i) + mbedtls_md_hmac_update(&ctx, addr[i], len[i]); + mbedtls_md_hmac_finish(&ctx, okm); + mbedtls_md_hmac_reset(&ctx); + addr[0] = okm; + okm += mac_len; + len[0] = mac_len; /*(include digest in subsequent rounds)*/ + } + + if (okm_len) { + u8 hash[MBEDTLS_MD_MAX_SIZE]; + for (size_t i = 0; i < ARRAY_SIZE(addr); ++i) + mbedtls_md_hmac_update(&ctx, addr[i], len[i]); + mbedtls_md_hmac_finish(&ctx, hash); + os_memcpy(okm, hash, okm_len); + forced_memzero(hash, mac_len); + } + + mbedtls_md_free(&ctx); + return 0; +} + +#ifdef MBEDTLS_SHA512_C +#ifdef CRYPTO_MBEDTLS_HMAC_KDF_SHA512 +int hmac_sha512_kdf(const u8 *secret, size_t secret_len, + const char *label, const u8 *seed, size_t seed_len, + u8 *out, size_t outlen) +{ + return hmac_kdf_expand(secret, secret_len, label, seed, seed_len, + out, outlen, MBEDTLS_MD_SHA512); +} +#endif + +#ifdef CRYPTO_MBEDTLS_HMAC_KDF_SHA384 +int hmac_sha384_kdf(const u8 *secret, size_t secret_len, + const char *label, const u8 *seed, size_t seed_len, + u8 *out, size_t outlen) +{ + return hmac_kdf_expand(secret, secret_len, label, seed, seed_len, + out, outlen, MBEDTLS_MD_SHA384); +} +#endif +#endif + +#ifdef MBEDTLS_SHA256_C +#ifdef CRYPTO_MBEDTLS_HMAC_KDF_SHA256 +int hmac_sha256_kdf(const u8 *secret, size_t secret_len, + const char *label, const u8 *seed, size_t seed_len, + u8 *out, size_t outlen) +{ + return hmac_kdf_expand(secret, secret_len, label, seed, seed_len, + out, outlen, MBEDTLS_MD_SHA256); +} +#endif +#endif + +#endif /* CRYPTO_MBEDTLS_HMAC_KDF_* */ + + +/* sha256-prf.c sha384-prf.c sha512-prf.c */ + +/* hmac_prf_bits - IEEE Std 802.11ac-2013, 11.6.1.7.2 Key derivation function */ +__attribute_noinline__ +static int hmac_prf_bits(const u8 *key, size_t key_len, const char *label, + const u8 *data, size_t data_len, u8 *buf, + size_t buf_len_bits, mbedtls_md_type_t md_type) +{ + mbedtls_md_context_t ctx; + mbedtls_md_init(&ctx); + const mbedtls_md_info_t *md_info = mbedtls_md_info_from_type(md_type); + if (mbedtls_md_setup(&ctx, md_info, 1) != 0) { + mbedtls_md_free(&ctx); + return -1; + } + mbedtls_md_hmac_starts(&ctx, key, key_len); + + u16 ctr, n_le = host_to_le16(buf_len_bits); + const u8 * const addr[] = { (u8 *)&ctr,(u8 *)label,data,(u8 *)&n_le }; + const size_t len[] = { 2, os_strlen(label), data_len, 2 }; + const size_t mac_len = mbedtls_md_get_size(md_info); + size_t buf_len = (buf_len_bits + 7) / 8; + for (ctr = 1; buf_len >= mac_len; buf_len -= mac_len, ++ctr) { + #if __BYTE_ORDER == __BIG_ENDIAN + ctr = host_to_le16(ctr); + #endif + for (size_t i = 0; i < ARRAY_SIZE(addr); ++i) + mbedtls_md_hmac_update(&ctx, addr[i], len[i]); + mbedtls_md_hmac_finish(&ctx, buf); + mbedtls_md_hmac_reset(&ctx); + buf += mac_len; + #if __BYTE_ORDER == __BIG_ENDIAN + ctr = le_to_host16(ctr); + #endif + } + + if (buf_len) { + u8 hash[MBEDTLS_MD_MAX_SIZE]; + #if __BYTE_ORDER == __BIG_ENDIAN + ctr = host_to_le16(ctr); + #endif + for (size_t i = 0; i < ARRAY_SIZE(addr); ++i) + mbedtls_md_hmac_update(&ctx, addr[i], len[i]); + mbedtls_md_hmac_finish(&ctx, hash); + os_memcpy(buf, hash, buf_len); + buf += buf_len; + forced_memzero(hash, mac_len); + } + + /* Mask out unused bits in last octet if it does not use all the bits */ + if ((buf_len_bits &= 0x7)) + buf[-1] &= (u8)(0xff << (8 - buf_len_bits)); + + mbedtls_md_free(&ctx); + return 0; +} + +#ifdef MBEDTLS_SHA512_C +int sha512_prf(const u8 *key, size_t key_len, const char *label, + const u8 *data, size_t data_len, u8 *buf, size_t buf_len) +{ + return hmac_prf_bits(key, key_len, label, data, data_len, buf, + buf_len * 8, MBEDTLS_MD_SHA512); +} + +int sha384_prf(const u8 *key, size_t key_len, const char *label, + const u8 *data, size_t data_len, u8 *buf, size_t buf_len) +{ + return hmac_prf_bits(key, key_len, label, data, data_len, buf, + buf_len * 8, MBEDTLS_MD_SHA384); +} +#endif + +#ifdef MBEDTLS_SHA256_C +int sha256_prf(const u8 *key, size_t key_len, const char *label, + const u8 *data, size_t data_len, u8 *buf, size_t buf_len) +{ + return hmac_prf_bits(key, key_len, label, data, data_len, buf, + buf_len * 8, MBEDTLS_MD_SHA256); +} + +int sha256_prf_bits(const u8 *key, size_t key_len, const char *label, + const u8 *data, size_t data_len, u8 *buf, + size_t buf_len_bits) +{ + return hmac_prf_bits(key, key_len, label, data, data_len, buf, + buf_len_bits, MBEDTLS_MD_SHA256); +} +#endif + +#endif /* MBEDTLS_SHA256_C || MBEDTLS_SHA512_C */ + + +#ifdef MBEDTLS_SHA1_C + +/* sha1-prf.c */ + +/* sha1_prf - SHA1-based Pseudo-Random Function (PRF) (IEEE 802.11i, 8.5.1.1) */ + +int sha1_prf(const u8 *key, size_t key_len, const char *label, + const u8 *data, size_t data_len, u8 *buf, size_t buf_len) +{ + /*(note: algorithm differs from hmac_prf_bits() */ + /*(note: smaller code size instead of expanding hmac_sha1_vector() + * as is done in hmac_prf_bits(); not expecting large num of loops) */ + u8 counter = 0; + const u8 *addr[] = { (u8 *)label, data, &counter }; + const size_t len[] = { os_strlen(label)+1, data_len, 1 }; + + for (; buf_len >= SHA1_MAC_LEN; buf_len -= SHA1_MAC_LEN, ++counter) { + if (hmac_sha1_vector(key, key_len, 3, addr, len, buf)) + return -1; + buf += SHA1_MAC_LEN; + } + + if (buf_len) { + u8 hash[SHA1_MAC_LEN]; + if (hmac_sha1_vector(key, key_len, 3, addr, len, hash)) + return -1; + os_memcpy(buf, hash, buf_len); + forced_memzero(hash, sizeof(hash)); + } + + return 0; +} + +#ifdef CRYPTO_MBEDTLS_SHA1_T_PRF + +/* sha1-tprf.c */ + +/* sha1_t_prf - EAP-FAST Pseudo-Random Function (T-PRF) (RFC 4851,Section 5.5)*/ + +int sha1_t_prf(const u8 *key, size_t key_len, const char *label, + const u8 *seed, size_t seed_len, u8 *buf, size_t buf_len) +{ + /*(note: algorithm differs from hmac_prf_bits() and hmac_kdf() above)*/ + /*(note: smaller code size instead of expanding hmac_sha1_vector() + * as is done in hmac_prf_bits(); not expecting large num of loops) */ + u8 ctr; + u16 olen = host_to_be16(buf_len); + const u8 *addr[] = { buf, (u8 *)label, seed, (u8 *)&olen, &ctr }; + size_t len[] = { 0, os_strlen(label)+1, seed_len, 2, 1 }; + + for (ctr = 1; buf_len >= SHA1_MAC_LEN; buf_len -= SHA1_MAC_LEN, ++ctr) { + if (hmac_sha1_vector(key, key_len, 5, addr, len, buf)) + return -1; + addr[0] = buf; + buf += SHA1_MAC_LEN; + len[0] = SHA1_MAC_LEN; /*(include digest in subsequent rounds)*/ + } + + if (buf_len) { + u8 hash[SHA1_MAC_LEN]; + if (hmac_sha1_vector(key, key_len, 5, addr, len, hash)) + return -1; + os_memcpy(buf, hash, buf_len); + forced_memzero(hash, sizeof(hash)); + } + + return 0; +} + +#endif /* CRYPTO_MBEDTLS_SHA1_T_PRF */ + +#endif /* MBEDTLS_SHA1_C */ + + +#ifdef CRYPTO_MBEDTLS_DES_ENCRYPT +#ifdef MBEDTLS_DES_C +#include +int des_encrypt(const u8 *clear, const u8 *key, u8 *cypher) +{ + u8 pkey[8], next, tmp; + int i; + + /* Add parity bits to the key */ + next = 0; + for (i = 0; i < 7; i++) { + tmp = key[i]; + pkey[i] = (tmp >> i) | next | 1; + next = tmp << (7 - i); + } + pkey[i] = next | 1; + + mbedtls_des_context des; + mbedtls_des_init(&des); + int ret = mbedtls_des_setkey_enc(&des, pkey) + || mbedtls_des_crypt_ecb(&des, clear, cypher) ? -1 : 0; + mbedtls_des_free(&des); + return ret; +} +#else +#include "des-internal.c"/* pull in hostap local implementation */ +#endif +#endif + + +#ifdef CRYPTO_MBEDTLS_PBKDF2_SHA1 +/* sha1-pbkdf2.c */ +#include +int pbkdf2_sha1(const char *passphrase, const u8 *ssid, size_t ssid_len, + int iterations, u8 *buf, size_t buflen) +{ + #if MBEDTLS_VERSION_NUMBER >= 0x03020200 /* mbedtls 3.2.2 */ + return mbedtls_pkcs5_pbkdf2_hmac_ext(MBEDTLS_MD_SHA1, + (const u8 *)passphrase, os_strlen(passphrase), + ssid, ssid_len, iterations, 32, buf) ? -1 : 0; + #else + const mbedtls_md_info_t *md_info; + md_info = mbedtls_md_info_from_type(MBEDTLS_MD_SHA1); + if (md_info == NULL) + return -1; + mbedtls_md_context_t ctx; + mbedtls_md_init(&ctx); + int ret = mbedtls_md_setup(&ctx, md_info, 1) + || mbedtls_pkcs5_pbkdf2_hmac(&ctx, + (const u8 *)passphrase, os_strlen(passphrase), + ssid, ssid_len, iterations, 32, buf) ? -1 : 0; + mbedtls_md_free(&ctx); + return ret; + #endif +} +#endif + + +/*#include "aes.h"*/ /* prototypes also included in "crypto.h" */ + +static void *aes_crypt_init_mode(const u8 *key, size_t len, int mode) +{ + mbedtls_aes_context *aes = os_malloc(sizeof(*aes)); + if (!aes) + return NULL; + + mbedtls_aes_init(aes); + if ((mode == MBEDTLS_AES_ENCRYPT + ? mbedtls_aes_setkey_enc(aes, key, len * 8) + : mbedtls_aes_setkey_dec(aes, key, len * 8)) == 0) + return aes; + + mbedtls_aes_free(aes); + os_free(aes); + return NULL; +} + +void *aes_encrypt_init(const u8 *key, size_t len) +{ + return aes_crypt_init_mode(key, len, MBEDTLS_AES_ENCRYPT); +} + +int aes_encrypt(void *ctx, const u8 *plain, u8 *crypt) +{ + return mbedtls_aes_crypt_ecb(ctx, MBEDTLS_AES_ENCRYPT, plain, crypt); +} + +void aes_encrypt_deinit(void *ctx) +{ + mbedtls_aes_free(ctx); + os_free(ctx); +} + +void *aes_decrypt_init(const u8 *key, size_t len) +{ + return aes_crypt_init_mode(key, len, MBEDTLS_AES_DECRYPT); +} + +int aes_decrypt(void *ctx, const u8 *crypt, u8 *plain) +{ + return mbedtls_aes_crypt_ecb(ctx, MBEDTLS_AES_DECRYPT, crypt, plain); +} + +void aes_decrypt_deinit(void *ctx) +{ + mbedtls_aes_free(ctx); + os_free(ctx); +} + + +#include "aes_wrap.h" + + +#ifdef MBEDTLS_NIST_KW_C + +#include + +/* aes-wrap.c */ +int aes_wrap(const u8 *kek, size_t kek_len, int n, const u8 *plain, u8 *cipher) +{ + mbedtls_nist_kw_context ctx; + mbedtls_nist_kw_init(&ctx); + size_t olen; + int ret = mbedtls_nist_kw_setkey(&ctx, MBEDTLS_CIPHER_ID_AES, + kek, kek_len*8, 1) + || mbedtls_nist_kw_wrap(&ctx, MBEDTLS_KW_MODE_KW, plain, n*8, + cipher, &olen, (n+1)*8) ? -1 : 0; + mbedtls_nist_kw_free(&ctx); + return ret; +} + +/* aes-unwrap.c */ +int aes_unwrap(const u8 *kek, size_t kek_len, int n, const u8 *cipher, u8 *plain) +{ + mbedtls_nist_kw_context ctx; + mbedtls_nist_kw_init(&ctx); + size_t olen; + int ret = mbedtls_nist_kw_setkey(&ctx, MBEDTLS_CIPHER_ID_AES, + kek, kek_len*8, 0) + || mbedtls_nist_kw_unwrap(&ctx, MBEDTLS_KW_MODE_KW, cipher, + (n+1)*8, plain, &olen, n*8) ? -1 : 0; + mbedtls_nist_kw_free(&ctx); + return ret; +} + +#else + +#ifndef CRYPTO_MBEDTLS_CONFIG_FIPS +#include "aes-wrap.c" /* pull in hostap local implementation */ +#include "aes-unwrap.c" /* pull in hostap local implementation */ +#endif + +#endif /* MBEDTLS_NIST_KW_C */ + + +#ifdef MBEDTLS_CMAC_C + +/* aes-omac1.c */ + +#include + +int omac1_aes_vector( + const u8 *key, size_t key_len, size_t num_elem, const u8 *addr[], + const size_t *len, u8 *mac) +{ + mbedtls_cipher_type_t cipher_type; + switch (key_len) { + case 16: cipher_type = MBEDTLS_CIPHER_AES_128_ECB; break; + case 24: cipher_type = MBEDTLS_CIPHER_AES_192_ECB; break; + case 32: cipher_type = MBEDTLS_CIPHER_AES_256_ECB; break; + default: return -1; + } + const mbedtls_cipher_info_t *cipher_info; + cipher_info = mbedtls_cipher_info_from_type(cipher_type); + if (cipher_info == NULL) + return -1; + + mbedtls_cipher_context_t ctx; + mbedtls_cipher_init(&ctx); + int ret = -1; + if (mbedtls_cipher_setup(&ctx, cipher_info) == 0 + && mbedtls_cipher_cmac_starts(&ctx, key, key_len*8) == 0) { + ret = 0; + for (size_t i = 0; i < num_elem && ret == 0; ++i) + ret = mbedtls_cipher_cmac_update(&ctx, addr[i], len[i]); + } + if (ret == 0) + ret = mbedtls_cipher_cmac_finish(&ctx, mac); + mbedtls_cipher_free(&ctx); + return ret ? -1 : 0; +} + +int omac1_aes_128_vector(const u8 *key, size_t num_elem, + const u8 *addr[], const size_t *len, + u8 *mac) +{ + return omac1_aes_vector(key, 16, num_elem, addr, len, mac); +} + +int omac1_aes_128(const u8 *key, const u8 *data, size_t data_len, u8 *mac) +{ + return omac1_aes_vector(key, 16, 1, &data, &data_len, mac); +} + +int omac1_aes_256(const u8 *key, const u8 *data, size_t data_len, u8 *mac) +{ + return omac1_aes_vector(key, 32, 1, &data, &data_len, mac); +} + +#else + +#include "aes-omac1.c" /* pull in hostap local implementation */ + +#ifndef MBEDTLS_AES_BLOCK_SIZE +#define MBEDTLS_AES_BLOCK_SIZE 16 +#endif + +#endif /* MBEDTLS_CMAC_C */ + + +/* These interfaces can be inefficient when used in loops, as the overhead of + * initialization each call is large for each block input (e.g. 16 bytes) */ + + +/* aes-encblock.c */ +int aes_128_encrypt_block(const u8 *key, const u8 *in, u8 *out) +{ + mbedtls_aes_context aes; + mbedtls_aes_init(&aes); + int ret = mbedtls_aes_setkey_enc(&aes, key, 128) + || mbedtls_aes_crypt_ecb(&aes, MBEDTLS_AES_ENCRYPT, in, out) + ? -1 + : 0; + mbedtls_aes_free(&aes); + return ret; +} + + +/* aes-ctr.c */ +int aes_ctr_encrypt(const u8 *key, size_t key_len, const u8 *nonce, + u8 *data, size_t data_len) +{ + unsigned char counter[MBEDTLS_AES_BLOCK_SIZE]; + unsigned char stream_block[MBEDTLS_AES_BLOCK_SIZE]; + os_memcpy(counter, nonce, MBEDTLS_AES_BLOCK_SIZE);/*(must be writable)*/ + + mbedtls_aes_context ctx; + mbedtls_aes_init(&ctx); + size_t nc_off = 0; + int ret = mbedtls_aes_setkey_enc(&ctx, key, key_len*8) + || mbedtls_aes_crypt_ctr(&ctx, data_len, &nc_off, + counter, stream_block, + data, data) ? -1 : 0; + forced_memzero(stream_block, sizeof(stream_block)); + mbedtls_aes_free(&ctx); + return ret; +} + +int aes_128_ctr_encrypt(const u8 *key, const u8 *nonce, + u8 *data, size_t data_len) +{ + return aes_ctr_encrypt(key, 16, nonce, data, data_len); +} + + +/* aes-cbc.c */ +static int aes_128_cbc_oper(const u8 *key, const u8 *iv, + u8 *data, size_t data_len, int mode) +{ + unsigned char ivec[MBEDTLS_AES_BLOCK_SIZE]; + os_memcpy(ivec, iv, MBEDTLS_AES_BLOCK_SIZE); /*(must be writable)*/ + + mbedtls_aes_context ctx; + mbedtls_aes_init(&ctx); + int ret = (mode == MBEDTLS_AES_ENCRYPT + ? mbedtls_aes_setkey_enc(&ctx, key, 128) + : mbedtls_aes_setkey_dec(&ctx, key, 128)) + || mbedtls_aes_crypt_cbc(&ctx, mode, data_len, ivec, data, data); + mbedtls_aes_free(&ctx); + return ret ? -1 : 0; +} + +int aes_128_cbc_encrypt(const u8 *key, const u8 *iv, u8 *data, size_t data_len) +{ + return aes_128_cbc_oper(key, iv, data, data_len, MBEDTLS_AES_ENCRYPT); +} + +int aes_128_cbc_decrypt(const u8 *key, const u8 *iv, u8 *data, size_t data_len) +{ + return aes_128_cbc_oper(key, iv, data, data_len, MBEDTLS_AES_DECRYPT); +} + + +/* + * Much of the following is documented in crypto.h as for CONFIG_TLS=internal + * but such comments are not accurate: + * + * "This function is only used with internal TLSv1 implementation + * (CONFIG_TLS=internal). If that is not used, the crypto wrapper does not need + * to implement this." + */ + + +#ifdef CRYPTO_MBEDTLS_CRYPTO_CIPHER + +#include + +struct crypto_cipher +{ + mbedtls_cipher_context_t ctx_enc; + mbedtls_cipher_context_t ctx_dec; +}; + +struct crypto_cipher * crypto_cipher_init(enum crypto_cipher_alg alg, + const u8 *iv, const u8 *key, + size_t key_len) +{ + /* IKEv2 src/eap_common/ikev2_common.c:ikev2_{encr,decr}_encrypt() + * uses one of CRYPTO_CIPHER_ALG_AES or CRYPTO_CIPHER_ALG_3DES */ + + mbedtls_cipher_type_t cipher_type; + size_t iv_len; + switch (alg) { + #ifdef MBEDTLS_ARC4_C + #if 0 + case CRYPTO_CIPHER_ALG_RC4: + cipher_type = MBEDTLS_CIPHER_ARC4_128; + iv_len = 0; + break; + #endif + #endif + #ifdef MBEDTLS_AES_C + case CRYPTO_CIPHER_ALG_AES: + if (key_len == 16) cipher_type = MBEDTLS_CIPHER_AES_128_CTR; + if (key_len == 24) cipher_type = MBEDTLS_CIPHER_AES_192_CTR; + if (key_len == 32) cipher_type = MBEDTLS_CIPHER_AES_256_CTR; + iv_len = 16; + break; + #endif + #ifdef MBEDTLS_DES_C + case CRYPTO_CIPHER_ALG_3DES: + cipher_type = MBEDTLS_CIPHER_DES_EDE3_CBC; + iv_len = 8; + break; + #if 0 + case CRYPTO_CIPHER_ALG_DES: + cipher_type = MBEDTLS_CIPHER_DES_CBC; + iv_len = 8; + break; + #endif + #endif + default: + return NULL; + } + + const mbedtls_cipher_info_t *cipher_info; + cipher_info = mbedtls_cipher_info_from_type(cipher_type); + if (cipher_info == NULL) + return NULL; + + key_len *= 8; /* key_bitlen */ + #if 0 /*(were key_bitlen not already available)*/ + #if MBEDTLS_VERSION_NUMBER >= 0x03010000 /* mbedtls 3.1.0 */ + key_len = mbedtls_cipher_info_get_key_bitlen(cipher_info); + #else + key_len = cipher_info->MBEDTLS_PRIVATE(key_bitlen); + #endif + #endif + + #if 0 /*(were iv_len not known above, would need MBEDTLS_PRIVATE(iv_size))*/ + iv_len = cipher_info->MBEDTLS_PRIVATE(iv_size); + #endif + + struct crypto_cipher *ctx = os_malloc(sizeof(*ctx)); + if (!ctx) + return NULL; + + mbedtls_cipher_init(&ctx->ctx_enc); + mbedtls_cipher_init(&ctx->ctx_dec); + if ( mbedtls_cipher_setup(&ctx->ctx_enc,cipher_info) == 0 + && mbedtls_cipher_setup(&ctx->ctx_dec,cipher_info) == 0 + && mbedtls_cipher_setkey(&ctx->ctx_enc,key,key_len,MBEDTLS_ENCRYPT) == 0 + && mbedtls_cipher_setkey(&ctx->ctx_dec,key,key_len,MBEDTLS_DECRYPT) == 0 + && mbedtls_cipher_set_iv(&ctx->ctx_enc,iv,iv_len) == 0 + && mbedtls_cipher_set_iv(&ctx->ctx_dec,iv,iv_len) == 0 + && mbedtls_cipher_reset(&ctx->ctx_enc) == 0 + && mbedtls_cipher_reset(&ctx->ctx_dec) == 0) { + return ctx; + } + + mbedtls_cipher_free(&ctx->ctx_enc); + mbedtls_cipher_free(&ctx->ctx_dec); + os_free(ctx); + return NULL; +} + +int crypto_cipher_encrypt(struct crypto_cipher *ctx, + const u8 *plain, u8 *crypt, size_t len) +{ + size_t olen = 0; /*(poor interface above; unknown size of u8 *crypt)*/ + return (mbedtls_cipher_update(&ctx->ctx_enc, plain, len, crypt, &olen) + || mbedtls_cipher_finish(&ctx->ctx_enc, crypt + olen, &olen)) ? -1 : 0; +} + +int crypto_cipher_decrypt(struct crypto_cipher *ctx, + const u8 *crypt, u8 *plain, size_t len) +{ + size_t olen = 0; /*(poor interface above; unknown size of u8 *plain)*/ + return (mbedtls_cipher_update(&ctx->ctx_dec, crypt, len, plain, &olen) + || mbedtls_cipher_finish(&ctx->ctx_dec, plain + olen, &olen)) ? -1 : 0; +} + +void crypto_cipher_deinit(struct crypto_cipher *ctx) +{ + mbedtls_cipher_free(&ctx->ctx_enc); + mbedtls_cipher_free(&ctx->ctx_dec); + os_free(ctx); +} + +#endif /* CRYPTO_MBEDTLS_CRYPTO_CIPHER */ + + +#ifdef CRYPTO_MBEDTLS_CRYPTO_HASH + +struct crypto_hash * crypto_hash_init(enum crypto_hash_alg alg, const u8 *key, + size_t key_len) +{ + mbedtls_md_type_t md_type; + int is_hmac = 0; + + switch (alg) { + #ifdef MBEDTLS_MD5_C + case CRYPTO_HASH_ALG_MD5: + md_type = MBEDTLS_MD_MD5; + break; + #endif + #ifdef MBEDTLS_SHA1_C + case CRYPTO_HASH_ALG_SHA1: + md_type = MBEDTLS_MD_SHA1; + break; + #endif + #ifdef MBEDTLS_MD5_C + case CRYPTO_HASH_ALG_HMAC_MD5: + md_type = MBEDTLS_MD_MD5; + is_hmac = 1; + break; + #endif + #ifdef MBEDTLS_SHA1_C + case CRYPTO_HASH_ALG_HMAC_SHA1: + md_type = MBEDTLS_MD_SHA1; + is_hmac = 1; + break; + #endif + #ifdef MBEDTLS_SHA256_C + case CRYPTO_HASH_ALG_SHA256: + md_type = MBEDTLS_MD_SHA256; + break; + case CRYPTO_HASH_ALG_HMAC_SHA256: + md_type = MBEDTLS_MD_SHA256; + is_hmac = 1; + break; + #endif + #ifdef MBEDTLS_SHA512_C + case CRYPTO_HASH_ALG_SHA384: + md_type = MBEDTLS_MD_SHA384; + break; + case CRYPTO_HASH_ALG_SHA512: + md_type = MBEDTLS_MD_SHA512; + break; + #endif + default: + return NULL; + } + + const mbedtls_md_info_t *md_info = mbedtls_md_info_from_type(md_type); + if (!md_info) + return NULL; + + mbedtls_md_context_t *mctx = os_malloc(sizeof(*mctx)); + if (mctx == NULL) + return NULL; + + mbedtls_md_init(mctx); + if (mbedtls_md_setup(mctx, md_info, is_hmac) != 0) { + os_free(mctx); + return NULL; + } + + if (is_hmac) + mbedtls_md_hmac_starts(mctx, key, key_len); + else + mbedtls_md_starts(mctx); + return (struct crypto_hash *)((uintptr_t)mctx | is_hmac); +} + +void crypto_hash_update(struct crypto_hash *ctx, const u8 *data, size_t len) +{ + mbedtls_md_context_t *mctx = (mbedtls_md_context_t*)((uintptr_t)ctx & ~1uL); + #if 0 + /*(mbedtls_md_hmac_update() and mbedtls_md_update() + * make same modifications under the hood in mbedtls)*/ + if ((uintptr_t)ctx & 1uL) + mbedtls_md_hmac_update(mctx, data, len); + else + #endif + mbedtls_md_update(mctx, data, len); +} + +int crypto_hash_finish(struct crypto_hash *ctx, u8 *mac, size_t *len) +{ + mbedtls_md_context_t *mctx = (mbedtls_md_context_t*)((uintptr_t)ctx & ~1uL); + if (mac != NULL && len != NULL) { /*(NULL if caller just freeing context)*/ + #if MBEDTLS_VERSION_NUMBER >= 0x03020000 /* mbedtls 3.2.0 */ + const mbedtls_md_info_t *md_info = mbedtls_md_info_from_ctx(mctx); + #else + const mbedtls_md_info_t *md_info = mctx->MBEDTLS_PRIVATE(md_info); + #endif + size_t maclen = mbedtls_md_get_size(md_info); + if (*len < maclen) { + *len = maclen; + /*(note: ctx not freed; can call again with larger *len)*/ + return -1; + } + *len = maclen; + if ((uintptr_t)ctx & 1uL) + mbedtls_md_hmac_finish(mctx, mac); + else + mbedtls_md_finish(mctx, mac); + } + mbedtls_md_free(mctx); + os_free(mctx); + return 0; +} + +#endif /* CRYPTO_MBEDTLS_CRYPTO_HASH */ + + +#ifdef CRYPTO_MBEDTLS_CRYPTO_BIGNUM + +#include + +/* crypto.h bignum interfaces */ + +struct crypto_bignum *crypto_bignum_init(void) +{ + mbedtls_mpi *bn = os_malloc(sizeof(*bn)); + if (bn) + mbedtls_mpi_init(bn); + return (struct crypto_bignum *)bn; +} + +struct crypto_bignum *crypto_bignum_init_set(const u8 *buf, size_t len) +{ + mbedtls_mpi *bn = os_malloc(sizeof(*bn)); + if (bn) { + mbedtls_mpi_init(bn); + if (mbedtls_mpi_read_binary(bn, buf, len) == 0) + return (struct crypto_bignum *)bn; + } + + os_free(bn); + return NULL; +} + +struct crypto_bignum *crypto_bignum_init_uint(unsigned int val) +{ + #if 0 /*(hostap use of this interface passes int, not uint)*/ + val = host_to_be32(val); + return crypto_bignum_init_set((const u8 *)&val, sizeof(val)); + #else + mbedtls_mpi *bn = os_malloc(sizeof(*bn)); + if (bn) { + mbedtls_mpi_init(bn); + if (mbedtls_mpi_lset(bn, (int)val) == 0) + return (struct crypto_bignum *)bn; + } + + os_free(bn); + return NULL; + #endif +} + +void crypto_bignum_deinit(struct crypto_bignum *n, int clear) +{ + mbedtls_mpi_free((mbedtls_mpi *)n); + os_free(n); +} + +int crypto_bignum_to_bin(const struct crypto_bignum *a, + u8 *buf, size_t buflen, size_t padlen) +{ + size_t n = mbedtls_mpi_size((mbedtls_mpi *)a); + if (n < padlen) + n = padlen; + return n > buflen || mbedtls_mpi_write_binary((mbedtls_mpi *)a, buf, n) + ? -1 + : (int)(n); +} + +int crypto_bignum_rand(struct crypto_bignum *r, const struct crypto_bignum *m) +{ + /*assert(r != m);*//* r must not be same as m for mbedtls_mpi_random()*/ + #if MBEDTLS_VERSION_NUMBER >= 0x021B0000 /* mbedtls 2.27.0 */ + return mbedtls_mpi_random((mbedtls_mpi *)r, 0, (mbedtls_mpi *)m, + mbedtls_ctr_drbg_random, + crypto_mbedtls_ctr_drbg()) ? -1 : 0; + #else + /* (needed by EAP_PWD, SAE, DPP) */ + wpa_printf(MSG_ERROR, + "mbedtls 2.27.0 or later required for mbedtls_mpi_random()"); + return -1; + #endif +} + +int crypto_bignum_add(const struct crypto_bignum *a, + const struct crypto_bignum *b, + struct crypto_bignum *c) +{ + return mbedtls_mpi_add_mpi((mbedtls_mpi *)c, + (const mbedtls_mpi *)a, + (const mbedtls_mpi *)b) ? -1 : 0; +} + +int crypto_bignum_mod(const struct crypto_bignum *a, + const struct crypto_bignum *b, + struct crypto_bignum *c) +{ + return mbedtls_mpi_mod_mpi((mbedtls_mpi *)c, + (const mbedtls_mpi *)a, + (const mbedtls_mpi *)b) ? -1 : 0; +} + +int crypto_bignum_exptmod(const struct crypto_bignum *a, + const struct crypto_bignum *b, + const struct crypto_bignum *c, + struct crypto_bignum *d) +{ + /* (check if input params match d; d is the result) */ + /* (a == d) is ok in current mbedtls implementation */ + if (b == d || c == d) { /*(not ok; store result in intermediate)*/ + mbedtls_mpi R; + mbedtls_mpi_init(&R); + int rc = mbedtls_mpi_exp_mod(&R, + (const mbedtls_mpi *)a, + (const mbedtls_mpi *)b, + (const mbedtls_mpi *)c, + NULL) + || mbedtls_mpi_copy((mbedtls_mpi *)d, &R) ? -1 : 0; + mbedtls_mpi_free(&R); + return rc; + } + else { + return mbedtls_mpi_exp_mod((mbedtls_mpi *)d, + (const mbedtls_mpi *)a, + (const mbedtls_mpi *)b, + (const mbedtls_mpi *)c, + NULL) ? -1 : 0; + } +} + +int crypto_bignum_inverse(const struct crypto_bignum *a, + const struct crypto_bignum *b, + struct crypto_bignum *c) +{ + return mbedtls_mpi_inv_mod((mbedtls_mpi *)c, + (const mbedtls_mpi *)a, + (const mbedtls_mpi *)b) ? -1 : 0; +} + +int crypto_bignum_sub(const struct crypto_bignum *a, + const struct crypto_bignum *b, + struct crypto_bignum *c) +{ + return mbedtls_mpi_sub_mpi((mbedtls_mpi *)c, + (const mbedtls_mpi *)a, + (const mbedtls_mpi *)b) ? -1 : 0; +} + +int crypto_bignum_div(const struct crypto_bignum *a, + const struct crypto_bignum *b, + struct crypto_bignum *c) +{ + /*(most current use of this crypto.h interface has a == c (result), + * so store result in an intermediate to avoid overwritten input)*/ + mbedtls_mpi R; + mbedtls_mpi_init(&R); + int rc = mbedtls_mpi_div_mpi(&R, NULL, + (const mbedtls_mpi *)a, + (const mbedtls_mpi *)b) + || mbedtls_mpi_copy((mbedtls_mpi *)c, &R) ? -1 : 0; + mbedtls_mpi_free(&R); + return rc; +} + +int crypto_bignum_addmod(const struct crypto_bignum *a, + const struct crypto_bignum *b, + const struct crypto_bignum *c, + struct crypto_bignum *d) +{ + return mbedtls_mpi_add_mpi((mbedtls_mpi *)d, + (const mbedtls_mpi *)a, + (const mbedtls_mpi *)b) + || mbedtls_mpi_mod_mpi((mbedtls_mpi *)d, + (mbedtls_mpi *)d, + (const mbedtls_mpi *)c) ? -1 : 0; +} + +int crypto_bignum_mulmod(const struct crypto_bignum *a, + const struct crypto_bignum *b, + const struct crypto_bignum *c, + struct crypto_bignum *d) +{ + return mbedtls_mpi_mul_mpi((mbedtls_mpi *)d, + (const mbedtls_mpi *)a, + (const mbedtls_mpi *)b) + || mbedtls_mpi_mod_mpi((mbedtls_mpi *)d, + (mbedtls_mpi *)d, + (const mbedtls_mpi *)c) ? -1 : 0; +} + +int crypto_bignum_sqrmod(const struct crypto_bignum *a, + const struct crypto_bignum *b, + struct crypto_bignum *c) +{ + #if 1 + return crypto_bignum_mulmod(a, a, b, c); + #else + mbedtls_mpi bn; + mbedtls_mpi_init(&bn); + if (mbedtls_mpi_lset(&bn, 2)) /* alt?: mbedtls_mpi_set_bit(&bn, 1) */ + return -1; + int ret = mbedtls_mpi_exp_mod((mbedtls_mpi *)c, + (const mbedtls_mpi *)a, &bn, + (const mbedtls_mpi *)b, NULL) ? -1 : 0; + mbedtls_mpi_free(&bn); + return ret; + #endif +} + +int crypto_bignum_rshift(const struct crypto_bignum *a, int n, + struct crypto_bignum *r) +{ + return mbedtls_mpi_copy((mbedtls_mpi *)r, (const mbedtls_mpi *)a) + || mbedtls_mpi_shift_r((mbedtls_mpi *)r, n) ? -1 : 0; +} + +int crypto_bignum_cmp(const struct crypto_bignum *a, + const struct crypto_bignum *b) +{ + return mbedtls_mpi_cmp_mpi((const mbedtls_mpi *)a, (const mbedtls_mpi *)b); +} + +int crypto_bignum_is_zero(const struct crypto_bignum *a) +{ + /* XXX: src/common/sae.c:sswu() contains comment: + * "TODO: Make sure crypto_bignum_is_zero() is constant time" + * Note: mbedtls_mpi_cmp_int() *is not* constant time */ + return (mbedtls_mpi_cmp_int((const mbedtls_mpi *)a, 0) == 0); +} + +int crypto_bignum_is_one(const struct crypto_bignum *a) +{ + return (mbedtls_mpi_cmp_int((const mbedtls_mpi *)a, 1) == 0); +} + +int crypto_bignum_is_odd(const struct crypto_bignum *a) +{ + return mbedtls_mpi_get_bit((const mbedtls_mpi *)a, 0); +} + +#include "utils/const_time.h" +int crypto_bignum_legendre(const struct crypto_bignum *a, + const struct crypto_bignum *p) +{ + /* Security Note: + * mbedtls_mpi_exp_mod() is not documented to run in constant time, + * though mbedtls/library/bignum.c uses constant_time_internal.h funcs. + * Compare to crypto_openssl.c:crypto_bignum_legendre() + * which uses openssl BN_mod_exp_mont_consttime() + * mbedtls/library/ecp.c has further countermeasures to timing attacks, + * (but ecp.c funcs are not used here) */ + + mbedtls_mpi exp, tmp; + mbedtls_mpi_init(&exp); + mbedtls_mpi_init(&tmp); + + /* exp = (p-1) / 2 */ + int res; + if (mbedtls_mpi_sub_int(&exp, (const mbedtls_mpi *)p, 1) == 0 + && mbedtls_mpi_shift_r(&exp, 1) == 0 + && mbedtls_mpi_exp_mod(&tmp, (const mbedtls_mpi *)a, &exp, + (const mbedtls_mpi *)p, NULL) == 0) { + /*(modified from crypto_openssl.c:crypto_bignum_legendre())*/ + /* Return 1 if tmp == 1, 0 if tmp == 0, or -1 otherwise. Need + * to use constant time selection to avoid branches here. */ + unsigned int mask; + res = -1; + mask = const_time_eq((mbedtls_mpi_cmp_int(&tmp, 1) == 0), 1); + res = const_time_select_int(mask, 1, res); + mask = const_time_eq((mbedtls_mpi_cmp_int(&tmp, 0) == 0), 1); + res = const_time_select_int(mask, 0, res); + } else { + res = -2; + } + + mbedtls_mpi_free(&tmp); + mbedtls_mpi_free(&exp); + return res; +} + +#endif /* CRYPTO_MBEDTLS_CRYPTO_BIGNUM */ + + +#ifdef CRYPTO_MBEDTLS_CRYPTO_DH + +/* crypto_internal-modexp.c */ + +#include +#include + +#if 0 /* crypto_dh_init() and crypto_dh_derive_secret() prefer to use mbedtls */ +int crypto_mod_exp(const u8 *base, size_t base_len, + const u8 *power, size_t power_len, + const u8 *modulus, size_t modulus_len, + u8 *result, size_t *result_len) +{ + mbedtls_mpi bn_base, bn_exp, bn_modulus, bn_result; + mbedtls_mpi_init(&bn_base); + mbedtls_mpi_init(&bn_exp); + mbedtls_mpi_init(&bn_modulus); + mbedtls_mpi_init(&bn_result); + + size_t len; + int ret = mbedtls_mpi_read_binary(&bn_base, base, base_len) + || mbedtls_mpi_read_binary(&bn_exp, power, power_len) + || mbedtls_mpi_read_binary(&bn_modulus, modulus, modulus_len) + || mbedtls_mpi_exp_mod(&bn_result,&bn_base,&bn_exp,&bn_modulus,NULL) + || (len = mbedtls_mpi_size(&bn_result)) > *result_len + || mbedtls_mpi_write_binary(&bn_result, result, (*result_len = len)) + ? -1 + : 0; + + mbedtls_mpi_free(&bn_base); + mbedtls_mpi_free(&bn_exp); + mbedtls_mpi_free(&bn_modulus); + mbedtls_mpi_free(&bn_result); + return ret; +} +#endif + +static int crypto_mbedtls_dh_set_bin_pg(mbedtls_dhm_context *ctx, u8 generator, + const u8 *prime, size_t prime_len) +{ + /*(could set these directly in MBEDTLS_PRIVATE members)*/ + mbedtls_mpi P, G; + mbedtls_mpi_init(&P); + mbedtls_mpi_init(&G); + int ret = mbedtls_mpi_lset(&G, generator) + || mbedtls_mpi_read_binary(&P, prime, prime_len) + || mbedtls_dhm_set_group(ctx, &P, &G); + mbedtls_mpi_free(&P); + mbedtls_mpi_free(&G); + return ret; +} + +__attribute_noinline__ +static int crypto_mbedtls_dh_init_public(mbedtls_dhm_context *ctx, u8 generator, + const u8 *prime, size_t prime_len, + u8 *privkey, u8 *pubkey) +{ + if (crypto_mbedtls_dh_set_bin_pg(ctx, generator, prime, prime_len) + || mbedtls_dhm_make_public(ctx, (int)prime_len, pubkey, prime_len, + mbedtls_ctr_drbg_random, + crypto_mbedtls_ctr_drbg())) + return -1; + + /*(enable later when upstream mbedtls interface changes require)*/ + #if 0 && MBEDTLS_VERSION_NUMBER >= 0x03000000 /* mbedtls 3.0.0 */ + mbedtls_mpi X; + mbedtls_mpi_init(&X); + int ret = mbedtls_dhm_get_value(ctx, MBEDTLS_DHM_PARAM_X, &X) + || mbedtls_mpi_write_binary(&X, privkey, prime_len) ? -1 : 0; + mbedtls_mpi_free(&X); + return ret; + #else + return mbedtls_mpi_write_binary(&ctx->MBEDTLS_PRIVATE(X), + privkey, prime_len) ? -1 : 0; + #endif +} + +int crypto_dh_init(u8 generator, const u8 *prime, size_t prime_len, u8 *privkey, + u8 *pubkey) +{ + #if 0 /*(crypto_dh_init() duplicated (and identical) in crypto_*.c modules)*/ + size_t pubkey_len, pad; + + if (os_get_random(privkey, prime_len) < 0) + return -1; + if (os_memcmp(privkey, prime, prime_len) > 0) { + /* Make sure private value is smaller than prime */ + privkey[0] = 0; + } + + pubkey_len = prime_len; + if (crypto_mod_exp(&generator, 1, privkey, prime_len, prime, prime_len, + pubkey, &pubkey_len) < 0) + return -1; + if (pubkey_len < prime_len) { + pad = prime_len - pubkey_len; + os_memmove(pubkey + pad, pubkey, pubkey_len); + os_memset(pubkey, 0, pad); + } + + return 0; + #else + /* Prefer to use mbedtls to derive our public/private key, as doing so + * leverages mbedtls to properly format output and to perform blinding*/ + mbedtls_dhm_context ctx; + mbedtls_dhm_init(&ctx); + int ret = crypto_mbedtls_dh_init_public(&ctx, generator, prime, + prime_len, privkey, pubkey); + mbedtls_dhm_free(&ctx); + return ret; + #endif +} + +/*(crypto_dh_derive_secret() could be implemented using crypto.h APIs + * instead of being reimplemented in each crypto_*.c)*/ +int crypto_dh_derive_secret(u8 generator, const u8 *prime, size_t prime_len, + const u8 *order, size_t order_len, + const u8 *privkey, size_t privkey_len, + const u8 *pubkey, size_t pubkey_len, + u8 *secret, size_t *len) +{ + #if 0 + if (pubkey_len > prime_len || + (pubkey_len == prime_len && + os_memcmp(pubkey, prime, prime_len) >= 0)) + return -1; + + int res = 0; + mbedtls_mpi pub; + mbedtls_mpi_init(&pub); + if (mbedtls_mpi_read_binary(&pub, pubkey, pubkey_len) + || mbedtls_mpi_cmp_int(&pub, 1) <= 0) { + res = -1; + } else if (order) { + mbedtls_mpi p, q, tmp; + mbedtls_mpi_init(&p); + mbedtls_mpi_init(&q); + mbedtls_mpi_init(&tmp); + + /* verify: pubkey^q == 1 mod p */ + res = (mbedtls_mpi_read_binary(&p, prime, prime_len) + || mbedtls_mpi_read_binary(&q, order, order_len) + || mbedtls_mpi_exp_mod(&tmp, &pub, &q, &p, NULL) + || mbedtls_mpi_cmp_int(&tmp, 1) != 0); + + mbedtls_mpi_free(&p); + mbedtls_mpi_free(&q); + mbedtls_mpi_free(&tmp); + } + mbedtls_mpi_free(&pub); + + return (res == 0) + ? crypto_mod_exp(pubkey, pubkey_len, privkey, privkey_len, + prime, prime_len, secret, len) + : -1; + #else + /* Prefer to use mbedtls to derive DH shared secret, as doing so + * leverages mbedtls to validate params and to perform blinding. + * + * Attempt to reconstitute DH context to derive shared secret + * (due to limitations of the interface, which ought to pass context). + * Force provided G (our private key) into context without validation. + * Regenerating GX (our public key) not needed to derive shared secret. + */ + /*(older compilers might not support VLAs)*/ + /*unsigned char buf[2+prime_len+2+1+2+pubkey_len];*/ + unsigned char buf[2+MBEDTLS_MPI_MAX_SIZE+2+1+2+MBEDTLS_MPI_MAX_SIZE]; + unsigned char *p = buf + 2 + prime_len; + if (2+prime_len+2+1+2+pubkey_len > sizeof(buf)) + return -1; + WPA_PUT_BE16(buf, prime_len); /*(2-byte big-endian size of prime)*/ + p[0] = 0; /*(2-byte big-endian size of generator)*/ + p[1] = 1; + p[2] = generator; + WPA_PUT_BE16(p+3, pubkey_len); /*(2-byte big-endian size of pubkey)*/ + os_memcpy(p+5, pubkey, pubkey_len); + os_memcpy(buf+2, prime, prime_len); + + mbedtls_dhm_context ctx; + mbedtls_dhm_init(&ctx); + p = buf; + int ret = mbedtls_dhm_read_params(&ctx, &p, p+2+prime_len+5+pubkey_len) + || mbedtls_mpi_read_binary(&ctx.MBEDTLS_PRIVATE(X), + privkey, privkey_len) + || mbedtls_dhm_calc_secret(&ctx, secret, *len, len, + mbedtls_ctr_drbg_random, + crypto_mbedtls_ctr_drbg()) ? -1 : 0; + mbedtls_dhm_free(&ctx); + return ret; + #endif +} + +/* dh_group5.c */ + +#include "dh_group5.h" + +/* RFC3526_PRIME_1536[] and RFC3526_GENERATOR_1536[] from crypto_wolfssl.c */ + +static const unsigned char RFC3526_PRIME_1536[] = { + 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xC9, 0x0F, 0xDA, 0xA2, + 0x21, 0x68, 0xC2, 0x34, 0xC4, 0xC6, 0x62, 0x8B, 0x80, 0xDC, 0x1C, 0xD1, + 0x29, 0x02, 0x4E, 0x08, 0x8A, 0x67, 0xCC, 0x74, 0x02, 0x0B, 0xBE, 0xA6, + 0x3B, 0x13, 0x9B, 0x22, 0x51, 0x4A, 0x08, 0x79, 0x8E, 0x34, 0x04, 0xDD, + 0xEF, 0x95, 0x19, 0xB3, 0xCD, 0x3A, 0x43, 0x1B, 0x30, 0x2B, 0x0A, 0x6D, + 0xF2, 0x5F, 0x14, 0x37, 0x4F, 0xE1, 0x35, 0x6D, 0x6D, 0x51, 0xC2, 0x45, + 0xE4, 0x85, 0xB5, 0x76, 0x62, 0x5E, 0x7E, 0xC6, 0xF4, 0x4C, 0x42, 0xE9, + 0xA6, 0x37, 0xED, 0x6B, 0x0B, 0xFF, 0x5C, 0xB6, 0xF4, 0x06, 0xB7, 0xED, + 0xEE, 0x38, 0x6B, 0xFB, 0x5A, 0x89, 0x9F, 0xA5, 0xAE, 0x9F, 0x24, 0x11, + 0x7C, 0x4B, 0x1F, 0xE6, 0x49, 0x28, 0x66, 0x51, 0xEC, 0xE4, 0x5B, 0x3D, + 0xC2, 0x00, 0x7C, 0xB8, 0xA1, 0x63, 0xBF, 0x05, 0x98, 0xDA, 0x48, 0x36, + 0x1C, 0x55, 0xD3, 0x9A, 0x69, 0x16, 0x3F, 0xA8, 0xFD, 0x24, 0xCF, 0x5F, + 0x83, 0x65, 0x5D, 0x23, 0xDC, 0xA3, 0xAD, 0x96, 0x1C, 0x62, 0xF3, 0x56, + 0x20, 0x85, 0x52, 0xBB, 0x9E, 0xD5, 0x29, 0x07, 0x70, 0x96, 0x96, 0x6D, + 0x67, 0x0C, 0x35, 0x4E, 0x4A, 0xBC, 0x98, 0x04, 0xF1, 0x74, 0x6C, 0x08, + 0xCA, 0x23, 0x73, 0x27, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF +}; + +static const unsigned char RFC3526_GENERATOR_1536[] = { + 0x02 +}; + +void * dh5_init(struct wpabuf **priv, struct wpabuf **publ) +{ + const unsigned char * const prime = RFC3526_PRIME_1536; + const size_t prime_len = sizeof(RFC3526_PRIME_1536); + const u8 generator = *RFC3526_GENERATOR_1536; + struct wpabuf *wpubl = NULL, *wpriv = NULL; + + mbedtls_dhm_context *ctx = os_malloc(sizeof(*ctx)); + if (ctx == NULL) + return NULL; + mbedtls_dhm_init(ctx); + + if ( (wpubl = wpabuf_alloc(prime_len)) + && (wpriv = wpabuf_alloc(prime_len)) + && crypto_mbedtls_dh_init_public(ctx, generator, prime, prime_len, + wpabuf_put(wpriv, prime_len), + wpabuf_put(wpubl, prime_len))==0) { + wpabuf_free(*publ); + wpabuf_clear_free(*priv); + *publ = wpubl; + *priv = wpriv; + return ctx; + } + + wpabuf_clear_free(wpriv); + wpabuf_free(wpubl); + mbedtls_dhm_free(ctx); + os_free(ctx); + return NULL; +} + +#ifdef CRYPTO_MBEDTLS_DH5_INIT_FIXED +void * dh5_init_fixed(const struct wpabuf *priv, const struct wpabuf *publ) +{ + const unsigned char * const prime = RFC3526_PRIME_1536; + const size_t prime_len = sizeof(RFC3526_PRIME_1536); + const u8 generator = *RFC3526_GENERATOR_1536; + + mbedtls_dhm_context *ctx = os_malloc(sizeof(*ctx)); + if (ctx == NULL) + return NULL; + mbedtls_dhm_init(ctx); + + if (crypto_mbedtls_dh_set_bin_pg(ctx, generator, prime, prime_len)==0 + #if 0 /*(ignore; not required to derive shared secret)*/ + && mbedtls_mpi_read_binary(&ctx->MBEDTLS_PRIVATE(GX), + wpabuf_head(publ),wpabuf_len(publ))==0 + #endif + && mbedtls_mpi_read_binary(&ctx->MBEDTLS_PRIVATE(X), + wpabuf_head(priv),wpabuf_len(priv))==0) { + return ctx; + } + + mbedtls_dhm_free(ctx); + os_free(ctx); + return NULL; +} +#endif + +struct wpabuf * dh5_derive_shared(void *ctx, const struct wpabuf *peer_public, + const struct wpabuf *own_private) +{ + /*((mbedtls_dhm_context *)ctx must already contain own_private)*/ + /* mbedtls 2.x: prime_len = ctx->len; */ + /* mbedtls 3.x: prime_len = mbedtls_dhm_get_len(ctx); */ + size_t olen = sizeof(RFC3526_PRIME_1536); /*(sizeof(); prime known)*/ + struct wpabuf *buf = wpabuf_alloc(olen); + if (buf == NULL) + return NULL; + if (mbedtls_dhm_read_public((mbedtls_dhm_context *)ctx, + wpabuf_head(peer_public), + wpabuf_len(peer_public)) == 0 + && mbedtls_dhm_calc_secret(ctx, wpabuf_mhead(buf), olen, &olen, + mbedtls_ctr_drbg_random, + crypto_mbedtls_ctr_drbg()) == 0) { + wpabuf_put(buf, olen); + return buf; + } + + wpabuf_free(buf); + return NULL; +} + +void dh5_free(void *ctx) +{ + mbedtls_dhm_free(ctx); + os_free(ctx); +} + +#endif /* CRYPTO_MBEDTLS_CRYPTO_DH */ + + +#if defined(CRYPTO_MBEDTLS_CRYPTO_ECDH) || defined(CRYPTO_MBEDTLS_CRYPTO_EC) + +#include + +#define CRYPTO_EC_pbits(e) (((mbedtls_ecp_group *)(e))->pbits) +#define CRYPTO_EC_plen(e) ((((mbedtls_ecp_group *)(e))->pbits+7)>>3) +#define CRYPTO_EC_P(e) (&((mbedtls_ecp_group *)(e))->P) +#define CRYPTO_EC_N(e) (&((mbedtls_ecp_group *)(e))->N) +#define CRYPTO_EC_A(e) (&((mbedtls_ecp_group *)(e))->A) +#define CRYPTO_EC_B(e) (&((mbedtls_ecp_group *)(e))->B) +#define CRYPTO_EC_G(e) (&((mbedtls_ecp_group *)(e))->G) + +static mbedtls_ecp_group_id crypto_mbedtls_ecp_group_id_from_ike_id(int group) +{ + /* https://www.iana.org/assignments/ikev2-parameters/ikev2-parameters.xhtml */ + switch (group) { + #ifdef MBEDTLS_ECP_DP_SECP256R1_ENABLED + case 19: return MBEDTLS_ECP_DP_SECP256R1; + #endif + #ifdef MBEDTLS_ECP_DP_SECP384R1_ENABLED + case 20: return MBEDTLS_ECP_DP_SECP384R1; + #endif + #ifdef MBEDTLS_ECP_DP_SECP521R1_ENABLED + case 21: return MBEDTLS_ECP_DP_SECP521R1; + #endif + #ifdef MBEDTLS_ECP_DP_SECP192R1_ENABLED + case 25: return MBEDTLS_ECP_DP_SECP192R1; + #endif + #ifdef MBEDTLS_ECP_DP_SECP224R1_ENABLED + case 26: return MBEDTLS_ECP_DP_SECP224R1; + #endif + #ifdef MBEDTLS_ECP_DP_BP256R1_ENABLED + case 28: return MBEDTLS_ECP_DP_BP256R1; + #endif + #ifdef MBEDTLS_ECP_DP_BP384R1_ENABLED + case 29: return MBEDTLS_ECP_DP_BP384R1; + #endif + #ifdef MBEDTLS_ECP_DP_BP512R1_ENABLED + case 30: return MBEDTLS_ECP_DP_BP512R1; + #endif + #ifdef MBEDTLS_ECP_DP_CURVE25519_ENABLED + case 31: return MBEDTLS_ECP_DP_CURVE25519; + #endif + #ifdef MBEDTLS_ECP_DP_CURVE448_ENABLED + case 32: return MBEDTLS_ECP_DP_CURVE448; + #endif + default: return MBEDTLS_ECP_DP_NONE; + } +} + +#ifdef CRYPTO_MBEDTLS_CRYPTO_EC +static int crypto_mbedtls_ike_id_from_ecp_group_id(mbedtls_ecp_group_id grp_id) +{ + /* https://www.iana.org/assignments/ikev2-parameters/ikev2-parameters.xhtml */ + /*(for crypto_ec_key_group())*/ + switch (grp_id) { + #ifdef MBEDTLS_ECP_DP_SECP256R1_ENABLED + case MBEDTLS_ECP_DP_SECP256R1: return 19; + #endif + #ifdef MBEDTLS_ECP_DP_SECP384R1_ENABLED + case MBEDTLS_ECP_DP_SECP384R1: return 20; + #endif + #ifdef MBEDTLS_ECP_DP_SECP521R1_ENABLED + case MBEDTLS_ECP_DP_SECP521R1: return 21; + #endif + #ifdef MBEDTLS_ECP_DP_SECP192R1_ENABLED + case MBEDTLS_ECP_DP_SECP192R1: return 25; + #endif + #ifdef MBEDTLS_ECP_DP_SECP224R1_ENABLED + case MBEDTLS_ECP_DP_SECP224R1: return 26; + #endif + #ifdef MBEDTLS_ECP_DP_BP256R1_ENABLED + case MBEDTLS_ECP_DP_BP256R1: return 28; + #endif + #ifdef MBEDTLS_ECP_DP_BP384R1_ENABLED + case MBEDTLS_ECP_DP_BP384R1: return 29; + #endif + #ifdef MBEDTLS_ECP_DP_BP512R1_ENABLED + case MBEDTLS_ECP_DP_BP512R1: return 30; + #endif + #ifdef MBEDTLS_ECP_DP_CURVE25519_ENABLED + case MBEDTLS_ECP_DP_CURVE25519: return 31; + #endif + #ifdef MBEDTLS_ECP_DP_CURVE448_ENABLED + case MBEDTLS_ECP_DP_CURVE448: return 32; + #endif + default: return -1; + } +} +#endif + +#endif /* CRYPTO_MBEDTLS_CRYPTO_ECDH || CRYPTO_MBEDTLS_CRYPTO_EC */ + + +#if defined(CRYPTO_MBEDTLS_CRYPTO_ECDH) || defined(CRYPTO_MBEDTLS_CRYPTO_EC_DPP) + +#include +#include + +static int crypto_mbedtls_keypair_gen(int group, mbedtls_pk_context *pk) +{ + mbedtls_ecp_group_id grp_id = + crypto_mbedtls_ecp_group_id_from_ike_id(group); + if (grp_id == MBEDTLS_ECP_DP_NONE) + return -1; + const mbedtls_pk_info_t *pk_info = + mbedtls_pk_info_from_type(MBEDTLS_PK_ECKEY); + if (pk_info == NULL) + return -1; + return mbedtls_pk_setup(pk, pk_info) + || mbedtls_ecp_gen_key(grp_id, mbedtls_pk_ec(*pk), + mbedtls_ctr_drbg_random, + crypto_mbedtls_ctr_drbg()) ? -1 : 0; +} + +#endif + + +#ifdef CRYPTO_MBEDTLS_CRYPTO_ECDH + +#include +#include +#include +#include + +/* wrap mbedtls_ecdh_context for more future-proof direct access to components + * (mbedtls_ecdh_context internal implementation may change between releases) + * + * If mbedtls_pk_context -- specifically underlying mbedtls_ecp_keypair -- + * lifetime were guaranteed to be longer than that of mbedtls_ecdh_context, + * then mbedtls_pk_context or mbedtls_ecp_keypair could be stored in crypto_ecdh + * (or crypto_ec_key could be stored in crypto_ecdh, and crypto_ec_key could + * wrap mbedtls_ecp_keypair and components, to avoid MBEDTLS_PRIVATE access) */ +struct crypto_ecdh { + mbedtls_ecdh_context ctx; + mbedtls_ecp_group grp; + mbedtls_ecp_point Q; +}; + +struct crypto_ecdh * crypto_ecdh_init(int group) +{ + mbedtls_pk_context pk; + mbedtls_pk_init(&pk); + struct crypto_ecdh *ecdh = crypto_mbedtls_keypair_gen(group, &pk) == 0 + ? crypto_ecdh_init2(group, (struct crypto_ec_key *)&pk) + : NULL; + mbedtls_pk_free(&pk); + return ecdh; +} + +struct crypto_ecdh * crypto_ecdh_init2(int group, + struct crypto_ec_key *own_key) +{ + mbedtls_ecp_group_id grp_id = + crypto_mbedtls_ecp_group_id_from_ike_id(group); + if (grp_id == MBEDTLS_ECP_DP_NONE) + return NULL; + mbedtls_ecp_keypair *ecp_kp = mbedtls_pk_ec(*(mbedtls_pk_context *)own_key); + struct crypto_ecdh *ecdh = os_malloc(sizeof(*ecdh)); + if (ecdh == NULL) + return NULL; + mbedtls_ecdh_init(&ecdh->ctx); + mbedtls_ecp_group_init(&ecdh->grp); + mbedtls_ecp_point_init(&ecdh->Q); + if (mbedtls_ecdh_setup(&ecdh->ctx, grp_id) == 0 + && mbedtls_ecdh_get_params(&ecdh->ctx,ecp_kp,MBEDTLS_ECDH_OURS) == 0) { + /* copy grp and Q for later use + * (retrieving this info later is more convoluted + * even if mbedtls_ecdh_make_public() is considered)*/ + #if MBEDTLS_VERSION_NUMBER >= 0x03020000 /* mbedtls 3.2.0 */ + mbedtls_mpi d; + mbedtls_mpi_init(&d); + if (mbedtls_ecp_export(ecp_kp, &ecdh->grp, &d, &ecdh->Q) == 0) { + mbedtls_mpi_free(&d); + return ecdh; + } + mbedtls_mpi_free(&d); + #else + if (mbedtls_ecp_group_load(&ecdh->grp, grp_id) == 0 + && mbedtls_ecp_copy(&ecdh->Q, &ecp_kp->MBEDTLS_PRIVATE(Q)) == 0) + return ecdh; + #endif + } + + mbedtls_ecp_point_free(&ecdh->Q); + mbedtls_ecp_group_free(&ecdh->grp); + mbedtls_ecdh_free(&ecdh->ctx); + os_free(ecdh); + return NULL; +} + +struct wpabuf * crypto_ecdh_get_pubkey(struct crypto_ecdh *ecdh, int inc_y) +{ + mbedtls_ecp_group *grp = &ecdh->grp; + size_t len = CRYPTO_EC_plen(grp); + #ifdef MBEDTLS_ECP_MONTGOMERY_ENABLED + /* len */ + #endif + #ifdef MBEDTLS_ECP_SHORT_WEIERSTRASS_ENABLED + if (mbedtls_ecp_get_type(grp) == MBEDTLS_ECP_TYPE_SHORT_WEIERSTRASS) + len = inc_y ? len*2+1 : len+1; + #endif + struct wpabuf *buf = wpabuf_alloc(len); + if (buf == NULL) + return NULL; + inc_y = inc_y ? MBEDTLS_ECP_PF_UNCOMPRESSED : MBEDTLS_ECP_PF_COMPRESSED; + if (mbedtls_ecp_point_write_binary(grp, &ecdh->Q, inc_y, &len, + wpabuf_mhead_u8(buf), len) == 0) { + wpabuf_put(buf, len); + return buf; + } + + wpabuf_free(buf); + return NULL; +} + +#if defined(MBEDTLS_ECP_SHORT_WEIERSTRASS_ENABLED) +static int crypto_mbedtls_short_weierstrass_derive_y(mbedtls_ecp_group *grp, + mbedtls_mpi *bn, + int parity_bit) +{ + /* y^2 = x^3 + ax + b + * sqrt(w) = w^((p+1)/4) mod p (for prime p where p = 3 mod 4) */ + mbedtls_mpi *cy2 = (mbedtls_mpi *) + crypto_ec_point_compute_y_sqr((struct crypto_ec *)grp, + (const struct crypto_bignum *)bn); /*x*/ + if (cy2 == NULL) + return -1; + + /*mbedtls_mpi_free(bn);*/ + /*(reuse bn to store result (y))*/ + + mbedtls_mpi exp; + mbedtls_mpi_init(&exp); + int ret = mbedtls_mpi_get_bit(&grp->P, 0) != 1 /*(p = 3 mod 4)*/ + || mbedtls_mpi_get_bit(&grp->P, 1) != 1 /*(p = 3 mod 4)*/ + || mbedtls_mpi_add_int(&exp, &grp->P, 1) + || mbedtls_mpi_shift_r(&exp, 2) + || mbedtls_mpi_exp_mod(bn, cy2, &exp, &grp->P, NULL) + || (mbedtls_mpi_get_bit(bn, 0) != parity_bit + && mbedtls_mpi_sub_mpi(bn, &grp->P, bn)); + mbedtls_mpi_free(&exp); + mbedtls_mpi_free(cy2); + os_free(cy2); + return ret; +} +#endif + +struct wpabuf * crypto_ecdh_set_peerkey(struct crypto_ecdh *ecdh, int inc_y, + const u8 *key, size_t len) +{ + if (len == 0) /*(invalid peer key)*/ + return NULL; + + mbedtls_ecp_group *grp = &ecdh->grp; + + #if defined(MBEDTLS_ECP_SHORT_WEIERSTRASS_ENABLED) + if (mbedtls_ecp_get_type(grp) == MBEDTLS_ECP_TYPE_SHORT_WEIERSTRASS) { + /* add header for mbedtls_ecdh_read_public() */ + u8 buf[256]; + if (sizeof(buf)-1 < len) + return NULL; + buf[0] = (u8)(len); + os_memcpy(buf+1, key, len); + + if (inc_y) { + if (!(len & 1)) { /*(dpp code/tests does not include tag?!?)*/ + if (sizeof(buf)-2 < len) + return NULL; + buf[0] = (u8)(1+len); + buf[1] = 0x04; + os_memcpy(buf+2, key, len); + } + len >>= 1; /*(repurpose len to prime_len)*/ + } + else if (key[0] == 0x02 || key[0] == 0x03) { /* (inc_y == 0) */ + --len; /*(repurpose len to prime_len)*/ + + /* mbedtls_ecp_point_read_binary() does not currently support + * MBEDTLS_ECP_PF_COMPRESSED format (buf[1] = 0x02 or 0x03) + * (returns MBEDTLS_ERR_ECP_FEATURE_UNAVAILABLE) */ + + /* derive y, amend buf[] with y for UNCOMPRESSED format */ + if (sizeof(buf)-2 < len*2 || len == 0) + return NULL; + buf[0] = (u8)(1+len*2); + buf[1] = 0x04; + mbedtls_mpi bn; + mbedtls_mpi_init(&bn); + int ret = mbedtls_mpi_read_binary(&bn, key+1, len) + || crypto_mbedtls_short_weierstrass_derive_y(grp, &bn, + key[0] & 1) + || mbedtls_mpi_write_binary(&bn, buf+2+len, len); + mbedtls_mpi_free(&bn); + if (ret != 0) + return NULL; + } + + if (key[0] == 0) /*(repurpose len to prime_len)*/ + len = CRYPTO_EC_plen(grp); + + if (mbedtls_ecdh_read_public(&ecdh->ctx, buf, buf[0]+1)) + return NULL; + } + #endif + #if defined(MBEDTLS_ECP_MONTGOMERY_ENABLED) + if (mbedtls_ecp_get_type(grp) == MBEDTLS_ECP_TYPE_MONTGOMERY) { + if (mbedtls_ecdh_read_public(&ecdh->ctx, key, len)) + return NULL; + } + #endif + + struct wpabuf *buf = wpabuf_alloc(len); + if (buf == NULL) + return NULL; + + if (mbedtls_ecdh_calc_secret(&ecdh->ctx, &len, + wpabuf_mhead(buf), len, + mbedtls_ctr_drbg_random, + crypto_mbedtls_ctr_drbg()) == 0) { + wpabuf_put(buf, len); + return buf; + } + + wpabuf_clear_free(buf); + return NULL; +} + +void crypto_ecdh_deinit(struct crypto_ecdh *ecdh) +{ + if (ecdh == NULL) + return; + mbedtls_ecp_point_free(&ecdh->Q); + mbedtls_ecp_group_free(&ecdh->grp); + mbedtls_ecdh_free(&ecdh->ctx); + os_free(ecdh); +} + +size_t crypto_ecdh_prime_len(struct crypto_ecdh *ecdh) +{ + return CRYPTO_EC_plen(&ecdh->grp); +} + +#endif /* CRYPTO_MBEDTLS_CRYPTO_ECDH */ + + +#ifdef CRYPTO_MBEDTLS_CRYPTO_EC + +#include + +struct crypto_ec *crypto_ec_init(int group) +{ + mbedtls_ecp_group_id grp_id = + crypto_mbedtls_ecp_group_id_from_ike_id(group); + if (grp_id == MBEDTLS_ECP_DP_NONE) + return NULL; + mbedtls_ecp_group *e = os_malloc(sizeof(*e)); + if (e == NULL) + return NULL; + mbedtls_ecp_group_init(e); + if (mbedtls_ecp_group_load(e, grp_id) == 0) + return (struct crypto_ec *)e; + + mbedtls_ecp_group_free(e); + os_free(e); + return NULL; +} + +void crypto_ec_deinit(struct crypto_ec *e) +{ + mbedtls_ecp_group_free((mbedtls_ecp_group *)e); + os_free(e); +} + +size_t crypto_ec_prime_len(struct crypto_ec *e) +{ + return CRYPTO_EC_plen(e); +} + +size_t crypto_ec_prime_len_bits(struct crypto_ec *e) +{ + return CRYPTO_EC_pbits(e); +} + +size_t crypto_ec_order_len(struct crypto_ec *e) +{ + return (mbedtls_mpi_bitlen(CRYPTO_EC_N(e)) + 7) / 8; +} + +const struct crypto_bignum *crypto_ec_get_prime(struct crypto_ec *e) +{ + return (const struct crypto_bignum *)CRYPTO_EC_P(e); +} + +const struct crypto_bignum *crypto_ec_get_order(struct crypto_ec *e) +{ + return (const struct crypto_bignum *)CRYPTO_EC_N(e); +} + +const struct crypto_bignum *crypto_ec_get_a(struct crypto_ec *e) +{ + static const uint8_t secp256r1_a[] = + {0xff,0xff,0xff,0xff,0x00,0x00,0x00,0x01, + 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, + 0x00,0x00,0x00,0x00,0xff,0xff,0xff,0xff, + 0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xfc}; + static const uint8_t secp384r1_a[] = + {0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, + 0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, + 0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, + 0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xfe, + 0xff,0xff,0xff,0xff,0x00,0x00,0x00,0x00, + 0x00,0x00,0x00,0x00,0xff,0xff,0xff,0xfc}; + static const uint8_t secp521r1_a[] = + {0x01,0xff,0xff,0xff,0xff,0xff,0xff,0xff, + 0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, + 0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, + 0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, + 0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, + 0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, + 0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, + 0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, + 0xff,0xfc}; + static const uint8_t secp192r1_a[] = + {0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, + 0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xfe, + 0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xfc}; + static const uint8_t secp224r1_a[] = + {0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, + 0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xfe, + 0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, + 0xff,0xff,0xff,0xfe}; + + const uint8_t *bin = NULL; + size_t len = 0; + + /* (mbedtls groups matching supported sswu_curve_param() IKE groups) */ + switch (((mbedtls_ecp_group *)e)->id) { + #ifdef MBEDTLS_ECP_DP_SECP256R1_ENABLED + case MBEDTLS_ECP_DP_SECP256R1: + bin = secp256r1_a; + len = sizeof(secp256r1_a); + break; + #endif + #ifdef MBEDTLS_ECP_DP_SECP384R1_ENABLED + case MBEDTLS_ECP_DP_SECP384R1: + bin = secp384r1_a; + len = sizeof(secp384r1_a); + break; + #endif + #ifdef MBEDTLS_ECP_DP_SECP521R1_ENABLED + case MBEDTLS_ECP_DP_SECP521R1: + bin = secp521r1_a; + len = sizeof(secp521r1_a); + break; + #endif + #ifdef MBEDTLS_ECP_DP_SECP192R1_ENABLED + case MBEDTLS_ECP_DP_SECP192R1: + bin = secp192r1_a; + len = sizeof(secp192r1_a); + break; + #endif + #ifdef MBEDTLS_ECP_DP_SECP224R1_ENABLED + case MBEDTLS_ECP_DP_SECP224R1: + bin = secp224r1_a; + len = sizeof(secp224r1_a); + break; + #endif + #ifdef MBEDTLS_ECP_DP_BP256R1_ENABLED + case MBEDTLS_ECP_DP_BP256R1: + return (const struct crypto_bignum *)CRYPTO_EC_A(e); + #endif + #ifdef MBEDTLS_ECP_DP_BP384R1_ENABLED + case MBEDTLS_ECP_DP_BP384R1: + return (const struct crypto_bignum *)CRYPTO_EC_A(e); + #endif + #ifdef MBEDTLS_ECP_DP_BP512R1_ENABLED + case MBEDTLS_ECP_DP_BP512R1: + return (const struct crypto_bignum *)CRYPTO_EC_A(e); + #endif + #ifdef MBEDTLS_ECP_DP_CURVE25519_ENABLED + case MBEDTLS_ECP_DP_CURVE25519: + return (const struct crypto_bignum *)CRYPTO_EC_A(e); + #endif + #ifdef MBEDTLS_ECP_DP_CURVE448_ENABLED + case MBEDTLS_ECP_DP_CURVE448: + return (const struct crypto_bignum *)CRYPTO_EC_A(e); + #endif + default: + return NULL; + } + + /*(note: not thread-safe; returns file-scoped static storage)*/ + if (mbedtls_mpi_read_binary(&mpi_sw_A, bin, len) == 0) + return (const struct crypto_bignum *)&mpi_sw_A; + return NULL; +} + +const struct crypto_bignum *crypto_ec_get_b(struct crypto_ec *e) +{ + return (const struct crypto_bignum *)CRYPTO_EC_B(e); +} + +const struct crypto_ec_point * crypto_ec_get_generator(struct crypto_ec *e) +{ + return (const struct crypto_ec_point *)CRYPTO_EC_G(e); +} + +struct crypto_ec_point *crypto_ec_point_init(struct crypto_ec *e) +{ + mbedtls_ecp_point *p = os_malloc(sizeof(*p)); + if (p != NULL) + mbedtls_ecp_point_init(p); + return (struct crypto_ec_point *)p; +} + +void crypto_ec_point_deinit(struct crypto_ec_point *p, int clear) +{ + mbedtls_ecp_point_free((mbedtls_ecp_point *)p); + os_free(p); +} + +int crypto_ec_point_x(struct crypto_ec *e, const struct crypto_ec_point *p, + struct crypto_bignum *x) +{ + mbedtls_mpi *px = &((mbedtls_ecp_point *)p)->MBEDTLS_PRIVATE(X); + return mbedtls_mpi_copy((mbedtls_mpi *)x, px) + ? -1 + : 0; +} + +int crypto_ec_point_to_bin(struct crypto_ec *e, + const struct crypto_ec_point *point, u8 *x, u8 *y) +{ + /* crypto.h documents crypto_ec_point_to_bin() output is big-endian */ + size_t len = CRYPTO_EC_plen(e); + if (x) { + mbedtls_mpi *px = &((mbedtls_ecp_point *)point)->MBEDTLS_PRIVATE(X); + if (mbedtls_mpi_write_binary(px, x, len)) + return -1; + } + if (y) { + #if 0 /*(should not be necessary; py mpi should be in initial state)*/ + #ifdef MBEDTLS_ECP_MONTGOMERY_ENABLED + if (mbedtls_ecp_get_type((mbedtls_ecp_group *)e) + == MBEDTLS_ECP_TYPE_MONTGOMERY) { + os_memset(y, 0, len); + return 0; + } + #endif + #endif + mbedtls_mpi *py = &((mbedtls_ecp_point *)point)->MBEDTLS_PRIVATE(Y); + if (mbedtls_mpi_write_binary(py, y, len)) + return -1; + } + return 0; +} + +struct crypto_ec_point * crypto_ec_point_from_bin(struct crypto_ec *e, + const u8 *val) +{ + size_t len = CRYPTO_EC_plen(e); + mbedtls_ecp_point *p = os_malloc(sizeof(*p)); + u8 buf[1+MBEDTLS_MPI_MAX_SIZE*2]; + if (p == NULL) + return NULL; + mbedtls_ecp_point_init(p); + + #ifdef MBEDTLS_ECP_SHORT_WEIERSTRASS_ENABLED + if (mbedtls_ecp_get_type((mbedtls_ecp_group *)e) + == MBEDTLS_ECP_TYPE_SHORT_WEIERSTRASS) { + #if 0 /* prefer alternative to MBEDTLS_PRIVATE() access */ + mbedtls_mpi *px = &((mbedtls_ecp_point *)p)->MBEDTLS_PRIVATE(X); + mbedtls_mpi *py = &((mbedtls_ecp_point *)p)->MBEDTLS_PRIVATE(Y); + mbedtls_mpi *pz = &((mbedtls_ecp_point *)p)->MBEDTLS_PRIVATE(Z); + + if (mbedtls_mpi_read_binary(px, val, len) == 0 + && mbedtls_mpi_read_binary(py, val + len, len) == 0 + && mbedtls_mpi_lset(pz, 1) == 0) + return (struct crypto_ec_point *)p; + #else + buf[0] = 0x04; + os_memcpy(buf+1, val, len*2); + if (mbedtls_ecp_point_read_binary((mbedtls_ecp_group *)e, p, + buf, 1+len*2) == 0) + return (struct crypto_ec_point *)p; + #endif + } + #endif + #ifdef MBEDTLS_ECP_MONTGOMERY_ENABLED + if (mbedtls_ecp_get_type((mbedtls_ecp_group *)e) + == MBEDTLS_ECP_TYPE_MONTGOMERY) { + /* crypto.h interface documents crypto_ec_point_from_bin() + * val is length: prime_len * 2 and is big-endian + * (Short Weierstrass is assumed by hostap) + * Reverse to little-endian format for Montgomery */ + for (unsigned int i = 0; i < len; ++i) + buf[i] = val[len-1-i]; + if (mbedtls_ecp_point_read_binary((mbedtls_ecp_group *)e, p, + buf, len) == 0) + return (struct crypto_ec_point *)p; + } + #endif + + mbedtls_ecp_point_free(p); + os_free(p); + return NULL; +} + +int crypto_ec_point_add(struct crypto_ec *e, const struct crypto_ec_point *a, + const struct crypto_ec_point *b, + struct crypto_ec_point *c) +{ + /* mbedtls does not provide an mbedtls_ecp_point add function */ + mbedtls_mpi one; + mbedtls_mpi_init(&one); + int ret = mbedtls_mpi_lset(&one, 1) + || mbedtls_ecp_muladd( + (mbedtls_ecp_group *)e, (mbedtls_ecp_point *)c, + &one, (const mbedtls_ecp_point *)a, + &one, (const mbedtls_ecp_point *)b) ? -1 : 0; + mbedtls_mpi_free(&one); + return ret; +} + +int crypto_ec_point_mul(struct crypto_ec *e, const struct crypto_ec_point *p, + const struct crypto_bignum *b, + struct crypto_ec_point *res) +{ + return mbedtls_ecp_mul( + (mbedtls_ecp_group *)e, (mbedtls_ecp_point *)res, + (const mbedtls_mpi *)b, (const mbedtls_ecp_point *)p, + mbedtls_ctr_drbg_random, crypto_mbedtls_ctr_drbg()) ? -1 : 0; +} + +int crypto_ec_point_invert(struct crypto_ec *e, struct crypto_ec_point *p) +{ + if (mbedtls_ecp_get_type((mbedtls_ecp_group *)e) + == MBEDTLS_ECP_TYPE_MONTGOMERY) { + /* e.g. MBEDTLS_ECP_DP_CURVE25519 and MBEDTLS_ECP_DP_CURVE448 */ + wpa_printf(MSG_ERROR, + "%s not implemented for Montgomery curves",__func__); + return -1; + } + + /* mbedtls does not provide an mbedtls_ecp_point invert function */ + /* below works for Short Weierstrass; incorrect for Montgomery curves */ + mbedtls_mpi *py = &((mbedtls_ecp_point *)p)->MBEDTLS_PRIVATE(Y); + return mbedtls_ecp_is_zero((mbedtls_ecp_point *)p) /*point at infinity*/ + || mbedtls_mpi_cmp_int(py, 0) == 0 /*point is its own inverse*/ + || mbedtls_mpi_sub_abs(py, CRYPTO_EC_P(e), py) == 0 ? 0 : -1; +} + +#ifdef MBEDTLS_ECP_SHORT_WEIERSTRASS_ENABLED +static int +crypto_ec_point_y_sqr_weierstrass(mbedtls_ecp_group *e, const mbedtls_mpi *x, + mbedtls_mpi *y2) +{ + /* MBEDTLS_ECP_TYPE_SHORT_WEIERSTRASS y^2 = x^3 + a x + b */ + + /* Short Weierstrass elliptic curve group w/o A set treated as A = -3 */ + /* Attempt to match mbedtls/library/ecp.c:ecp_check_pubkey_sw() behavior + * and elsewhere in mbedtls/library/ecp.c where if A is not set, it is + * treated as if A = -3. */ + + #if 0 + /* y^2 = x^3 + ax + b */ + mbedtls_mpi *A = &e->A; + mbedtls_mpi t, A_neg3; + if (&e->A.p == NULL) { + mbedtls_mpi_init(&A_neg3); + if (mbedtls_mpi_lset(&A_neg3, -3) != 0) { + mbedtls_mpi_free(&A_neg3); + return -1; + } + A = &A_neg3; + } + mbedtls_mpi_init(&t); + int ret = /* x^3 */ + mbedtls_mpi_lset(&t, 3) + || mbedtls_mpi_exp_mod(y2, x, &t, &e->P, NULL) + /* ax */ + || mbedtls_mpi_mul_mpi(y2, y2, A) + || mbedtls_mpi_mod_mpi(&t, &t, &e->P) + /* ax + b */ + || mbedtls_mpi_add_mpi(&t, &t, &e->B) + || mbedtls_mpi_mod_mpi(&t, &t, &e->P) + /* x^3 + ax + b */ + || mbedtls_mpi_add_mpi(&t, &t, y2) /* ax + b + x^3 */ + || mbedtls_mpi_mod_mpi(y2, &t, &e->P); + mbedtls_mpi_free(&t); + if (A == &A_neg3) + mbedtls_mpi_free(&A_neg3); + return ret; /* 0: success, non-zero: failure */ + #else + /* y^2 = x^3 + ax + b = (x^2 + a)x + b */ + return /* x^2 */ + mbedtls_mpi_mul_mpi(y2, x, x) + || mbedtls_mpi_mod_mpi(y2, y2, &e->P) + /* x^2 + a */ + || (e->A.MBEDTLS_PRIVATE(p) + ? mbedtls_mpi_add_mpi(y2, y2, &e->A) + : mbedtls_mpi_sub_int(y2, y2, 3)) + || mbedtls_mpi_mod_mpi(y2, y2, &e->P) + /* (x^2 + a)x */ + || mbedtls_mpi_mul_mpi(y2, y2, x) + || mbedtls_mpi_mod_mpi(y2, y2, &e->P) + /* (x^2 + a)x + b */ + || mbedtls_mpi_add_mpi(y2, y2, &e->B) + || mbedtls_mpi_mod_mpi(y2, y2, &e->P); + #endif +} +#endif /* MBEDTLS_ECP_SHORT_WEIERSTRASS_ENABLED */ + +#if 0 /* not used by hostap */ +#ifdef MBEDTLS_ECP_MONTGOMERY_ENABLED +static int +crypto_ec_point_y_sqr_montgomery(mbedtls_ecp_group *e, const mbedtls_mpi *x, + mbedtls_mpi *y2) +{ + /* XXX: !!! must be reviewed and audited for correctness !!! */ + + /* MBEDTLS_ECP_TYPE_MONTGOMERY y^2 = x^3 + a x^2 + x */ + + /* y^2 = x^3 + a x^2 + x = (x + a)x^2 + x */ + mbedtls_mpi x2; + mbedtls_mpi_init(&x2); + int ret = /* x^2 */ + mbedtls_mpi_mul_mpi(&x2, x, x) + || mbedtls_mpi_mod_mpi(&x2, &x2, &e->P) + /* x + a */ + || mbedtls_mpi_add_mpi(y2, x, &e->A) + || mbedtls_mpi_mod_mpi(y2, y2, &e->P) + /* (x + a)x^2 */ + || mbedtls_mpi_mul_mpi(y2, y2, &x2) + || mbedtls_mpi_mod_mpi(y2, y2, &e->P) + /* (x + a)x^2 + x */ + || mbedtls_mpi_add_mpi(y2, y2, x) + || mbedtls_mpi_mod_mpi(y2, y2, &e->P); + mbedtls_mpi_free(&x2); + return ret; /* 0: success, non-zero: failure */ +} +#endif /* MBEDTLS_ECP_MONTGOMERY_ENABLED */ +#endif + +struct crypto_bignum * +crypto_ec_point_compute_y_sqr(struct crypto_ec *e, + const struct crypto_bignum *x) +{ + mbedtls_mpi *y2 = os_malloc(sizeof(*y2)); + if (y2 == NULL) + return NULL; + mbedtls_mpi_init(y2); + + #ifdef MBEDTLS_ECP_SHORT_WEIERSTRASS_ENABLED + if (mbedtls_ecp_get_type((mbedtls_ecp_group *)e) + == MBEDTLS_ECP_TYPE_SHORT_WEIERSTRASS + && crypto_ec_point_y_sqr_weierstrass((mbedtls_ecp_group *)e, + (const mbedtls_mpi *)x, + y2) == 0) + return (struct crypto_bignum *)y2; + #endif + #if 0 /* not used by hostap */ + #ifdef MBEDTLS_ECP_MONTGOMERY_ENABLED + if (mbedtls_ecp_get_type((mbedtls_ecp_group *)e) + == MBEDTLS_ECP_TYPE_MONTGOMERY + && crypto_ec_point_y_sqr_montgomery((mbedtls_ecp_group *)e, + (const mbedtls_mpi *)x, + y2) == 0) + return (struct crypto_bignum *)y2; + #endif + #endif + + mbedtls_mpi_free(y2); + os_free(y2); + return NULL; +} + +int crypto_ec_point_is_at_infinity(struct crypto_ec *e, + const struct crypto_ec_point *p) +{ + return mbedtls_ecp_is_zero((mbedtls_ecp_point *)p); +} + +int crypto_ec_point_is_on_curve(struct crypto_ec *e, + const struct crypto_ec_point *p) +{ + #if 1 + return mbedtls_ecp_check_pubkey((const mbedtls_ecp_group *)e, + (const mbedtls_ecp_point *)p) == 0; + #else + /* compute y^2 mod P and compare to y^2 mod P */ + /*(ref: src/eap_common/eap_pwd_common.c:compute_password_element())*/ + const mbedtls_mpi *px = &((const mbedtls_ecp_point *)p)->MBEDTLS_PRIVATE(X); + mbedtls_mpi *cy2 = (mbedtls_mpi *) + crypto_ec_point_compute_y_sqr(e, (const struct crypto_bignum *)px); + if (cy2 == NULL) + return 0; + + mbedtls_mpi y2; + mbedtls_mpi_init(&y2); + const mbedtls_mpi *py = &((const mbedtls_ecp_point *)p)->MBEDTLS_PRIVATE(Y); + int is_on_curve = mbedtls_mpi_mul_mpi(&y2, py, py) /* y^2 mod P */ + || mbedtls_mpi_mod_mpi(&y2, &y2, CRYPTO_EC_P(e)) + || mbedtls_mpi_cmp_mpi(&y2, cy2) != 0 ? 0 : 1; + + mbedtls_mpi_free(&y2); + mbedtls_mpi_free(cy2); + os_free(cy2); + return is_on_curve; + #endif +} + +int crypto_ec_point_cmp(const struct crypto_ec *e, + const struct crypto_ec_point *a, + const struct crypto_ec_point *b) +{ + return mbedtls_ecp_point_cmp((const mbedtls_ecp_point *)a, + (const mbedtls_ecp_point *)b); +} + +#if !defined(CONFIG_NO_STDOUT_DEBUG) +void crypto_ec_point_debug_print(const struct crypto_ec *e, + const struct crypto_ec_point *p, + const char *title) +{ + u8 x[MBEDTLS_MPI_MAX_SIZE]; + u8 y[MBEDTLS_MPI_MAX_SIZE]; + size_t len = CRYPTO_EC_plen(e); + /* crypto_ec_point_to_bin ought to take (const struct crypto_ec *e) */ + struct crypto_ec *ee; + *(const struct crypto_ec **)&ee = e; /*(cast away const)*/ + if (crypto_ec_point_to_bin(ee, p, x, y) == 0) { + if (title) + wpa_printf(MSG_DEBUG, "%s", title); + wpa_hexdump(MSG_DEBUG, "x:", x, len); + wpa_hexdump(MSG_DEBUG, "y:", y, len); + } +} +#endif + + +struct crypto_ec_key * crypto_ec_key_parse_priv(const u8 *der, size_t der_len) +{ + mbedtls_pk_context *ctx = os_malloc(sizeof(*ctx)); + if (ctx == NULL) + return NULL; + mbedtls_pk_init(ctx); + #if MBEDTLS_VERSION_NUMBER < 0x03000000 /* mbedtls 3.0.0 */ + if (mbedtls_pk_parse_key(ctx, der, der_len, NULL, 0) == 0) + #else + if (mbedtls_pk_parse_key(ctx, der, der_len, NULL, 0, + mbedtls_ctr_drbg_random, + crypto_mbedtls_ctr_drbg()) == 0) + #endif + return (struct crypto_ec_key *)ctx; + + mbedtls_pk_free(ctx); + os_free(ctx); + return NULL; +} + +#ifdef CRYPTO_MBEDTLS_CRYPTO_HPKE +#ifdef CONFIG_MODULE_TESTS +/*(for crypto_module_tests.c)*/ +struct crypto_ec_key * crypto_ec_key_set_priv(int group, + const u8 *raw, size_t raw_len) +{ + mbedtls_ecp_group_id grp_id = + crypto_mbedtls_ecp_group_id_from_ike_id(group); + if (grp_id == MBEDTLS_ECP_DP_NONE) + return NULL; + const mbedtls_pk_info_t *pk_info = + mbedtls_pk_info_from_type(MBEDTLS_PK_ECKEY); + if (pk_info == NULL) + return NULL; + mbedtls_pk_context *ctx = os_malloc(sizeof(*ctx)); + if (ctx == NULL) + return NULL; + mbedtls_pk_init(ctx); + if (mbedtls_pk_setup(ctx, pk_info) == 0 + && mbedtls_ecp_read_key(grp_id,mbedtls_pk_ec(*ctx),raw,raw_len) == 0) { + return (struct crypto_ec_key *)ctx; + } + + mbedtls_pk_free(ctx); + os_free(ctx); + return NULL; +} +#endif +#endif + +#include +#include +static int crypto_mbedtls_pk_parse_subpubkey_compressed(mbedtls_pk_context *ctx, const u8 *der, size_t der_len) +{ + /* The following is modified from: + * mbedtls/library/pkparse.c:mbedtls_pk_parse_subpubkey() + * mbedtls/library/pkparse.c:pk_get_pk_alg() + * mbedtls/library/pkparse.c:pk_use_ecparams() + */ + mbedtls_pk_type_t pk_alg = MBEDTLS_PK_NONE; + const mbedtls_pk_info_t *pk_info; + int ret; + size_t len; + const unsigned char *end = der+der_len; + unsigned char *p; + *(const unsigned char **)&p = der; + + if( ( ret = mbedtls_asn1_get_tag( &p, end, &len, + MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 ) + { + return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT, ret ) ); + } + + end = p + len; + + /* + if( ( ret = pk_get_pk_alg( &p, end, &pk_alg, &alg_params ) ) != 0 ) + return( ret ); + */ + mbedtls_asn1_buf alg_oid, params; + memset( ¶ms, 0, sizeof(mbedtls_asn1_buf) ); + if( ( ret = mbedtls_asn1_get_alg( &p, end, &alg_oid, ¶ms ) ) != 0 ) + return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_PK_INVALID_ALG, ret ) ); + if( mbedtls_oid_get_pk_alg( &alg_oid, &pk_alg ) != 0 ) + return( MBEDTLS_ERR_PK_UNKNOWN_PK_ALG ); + + if( ( ret = mbedtls_asn1_get_bitstring_null( &p, end, &len ) ) != 0 ) + return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_PK_INVALID_PUBKEY, ret ) ); + + if( p + len != end ) + return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_PK_INVALID_PUBKEY, + MBEDTLS_ERR_ASN1_LENGTH_MISMATCH ) ); + + if( ( pk_info = mbedtls_pk_info_from_type( pk_alg ) ) == NULL ) + return( MBEDTLS_ERR_PK_UNKNOWN_PK_ALG ); + + if( ( ret = mbedtls_pk_setup( ctx, pk_info ) ) != 0 ) + return( ret ); + + /* assume mbedtls_pk_parse_subpubkey(&der, der+der_len, ctx) + * has already run with ctx initialized up to pk_get_ecpubkey(), + * and pk_get_ecpubkey() has returned MBEDTLS_ERR_ECP_FEATURE_UNAVAILABLE + * + * mbedtls mbedtls_ecp_point_read_binary() + * does not handle point in COMPRESSED format + * + * (validate assumption that algorithm is EC) */ + mbedtls_ecp_keypair *ecp_kp = mbedtls_pk_ec(*ctx); + if (ecp_kp == NULL) + return( MBEDTLS_ERR_ECP_FEATURE_UNAVAILABLE ); + mbedtls_ecp_group *ecp_kp_grp = &ecp_kp->MBEDTLS_PRIVATE(grp); + mbedtls_ecp_point *ecp_kp_Q = &ecp_kp->MBEDTLS_PRIVATE(Q); + mbedtls_ecp_group_id grp_id; + + + /* mbedtls/library/pkparse.c:pk_use_ecparams() */ + + if( params.tag == MBEDTLS_ASN1_OID ) + { + if( mbedtls_oid_get_ec_grp( ¶ms, &grp_id ) != 0 ) + return( MBEDTLS_ERR_PK_UNKNOWN_NAMED_CURVE ); + } + else + { +#if defined(MBEDTLS_PK_PARSE_EC_EXTENDED) + /*(large code block not copied from mbedtls; unsupported)*/ + #if 0 + if( ( ret = pk_group_id_from_specified( ¶ms, &grp_id ) ) != 0 ) + return( ret ); + #endif +#endif + return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT ); + } + + /* + * grp may already be initialized; if so, make sure IDs match + */ + if( ecp_kp_grp->id != MBEDTLS_ECP_DP_NONE && ecp_kp_grp->id != grp_id ) + return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT ); + + if( ( ret = mbedtls_ecp_group_load( ecp_kp_grp, grp_id ) ) != 0 ) + return( ret ); + + + /* (validate assumption that EC point is in COMPRESSED format) */ + len = CRYPTO_EC_plen(ecp_kp_grp); + if( mbedtls_ecp_get_type(ecp_kp_grp) != MBEDTLS_ECP_TYPE_SHORT_WEIERSTRASS + || (end - p) != 1+len + || (*p != 0x02 && *p != 0x03) ) + return( MBEDTLS_ERR_ECP_FEATURE_UNAVAILABLE ); + + /* Instead of calling mbedtls/library/pkparse.c:pk_get_ecpubkey() to call + * mbedtls_ecp_point_read_binary(), manually parse point into ecp_kp_Q */ + mbedtls_mpi *X = &ecp_kp_Q->MBEDTLS_PRIVATE(X); + mbedtls_mpi *Y = &ecp_kp_Q->MBEDTLS_PRIVATE(Y); + mbedtls_mpi *Z = &ecp_kp_Q->MBEDTLS_PRIVATE(Z); + ret = mbedtls_mpi_lset(Z, 1); + if (ret != 0) + return( ret ); + ret = mbedtls_mpi_read_binary(X, p+1, len); + if (ret != 0) + return( ret ); + /* derive Y + * (similar derivation of Y in crypto_mbedtls.c:crypto_ecdh_set_peerkey())*/ + ret = mbedtls_mpi_copy(Y, X) /*(Y is used as input and output obj below)*/ + || crypto_mbedtls_short_weierstrass_derive_y(ecp_kp_grp, Y, (*p & 1)); + if (ret != 0) + return( ret ); + + return mbedtls_ecp_check_pubkey( ecp_kp_grp, ecp_kp_Q ); +} + +struct crypto_ec_key * crypto_ec_key_parse_pub(const u8 *der, size_t der_len) +{ + mbedtls_pk_context *ctx = os_malloc(sizeof(*ctx)); + if (ctx == NULL) + return NULL; + mbedtls_pk_init(ctx); + /*int rc = mbedtls_pk_parse_subpubkey(&der, der+der_len, ctx);*/ + int rc = mbedtls_pk_parse_public_key(ctx, der, der_len); + if (rc == 0) + return (struct crypto_ec_key *)ctx; + else if (rc == MBEDTLS_ERR_ECP_FEATURE_UNAVAILABLE) { + /* mbedtls mbedtls_ecp_point_read_binary() + * does not handle point in COMPRESSED format; parse internally */ + rc = crypto_mbedtls_pk_parse_subpubkey_compressed(ctx,der,der_len); + if (rc == 0) + return (struct crypto_ec_key *)ctx; + } + + mbedtls_pk_free(ctx); + os_free(ctx); + return NULL; +} + +#ifdef CRYPTO_MBEDTLS_CRYPTO_EC_DPP + +static struct crypto_ec_key * +crypto_ec_key_set_pub_point_for_group(mbedtls_ecp_group_id grp_id, + const mbedtls_ecp_point *pub, + const u8 *buf, size_t len) +{ + const mbedtls_pk_info_t *pk_info = + mbedtls_pk_info_from_type(MBEDTLS_PK_ECKEY); + if (pk_info == NULL) + return NULL; + mbedtls_pk_context *ctx = os_malloc(sizeof(*ctx)); + if (ctx == NULL) + return NULL; + mbedtls_pk_init(ctx); + if (mbedtls_pk_setup(ctx, pk_info) == 0) { + /* (Is private key generation necessary for callers?) + * alt: gen key then overwrite Q + * mbedtls_ecp_gen_key(grp_id, ecp_kp, + * mbedtls_ctr_drbg_random, + * crypto_mbedtls_ctr_drbg()) == 0 + */ + mbedtls_ecp_keypair *ecp_kp = mbedtls_pk_ec(*ctx); + mbedtls_ecp_group *ecp_kp_grp = &ecp_kp->MBEDTLS_PRIVATE(grp); + mbedtls_ecp_point *ecp_kp_Q = &ecp_kp->MBEDTLS_PRIVATE(Q); + mbedtls_mpi *ecp_kp_d = &ecp_kp->MBEDTLS_PRIVATE(d); + if (mbedtls_ecp_group_load(ecp_kp_grp, grp_id) == 0 + && (pub + ? mbedtls_ecp_copy(ecp_kp_Q, pub) == 0 + : mbedtls_ecp_point_read_binary(ecp_kp_grp, ecp_kp_Q, + buf, len) == 0) + && mbedtls_ecp_gen_privkey(ecp_kp_grp, ecp_kp_d, + mbedtls_ctr_drbg_random, + crypto_mbedtls_ctr_drbg()) == 0){ + return (struct crypto_ec_key *)ctx; + } + } + + mbedtls_pk_free(ctx); + os_free(ctx); + return NULL; +} + +struct crypto_ec_key * crypto_ec_key_set_pub(int group, const u8 *x, + const u8 *y, size_t len) +{ + mbedtls_ecp_group_id grp_id = + crypto_mbedtls_ecp_group_id_from_ike_id(group); + if (grp_id == MBEDTLS_ECP_DP_NONE) + return NULL; + if (len > MBEDTLS_MPI_MAX_SIZE) + return NULL; + u8 buf[1+MBEDTLS_MPI_MAX_SIZE*2]; + buf[0] = 0x04; /* assume x,y for Short Weierstrass */ + os_memcpy(buf+1, x, len); + os_memcpy(buf+1+len, y, len); + + return crypto_ec_key_set_pub_point_for_group(grp_id,NULL,buf,1+len*2); +} + +struct crypto_ec_key * +crypto_ec_key_set_pub_point(struct crypto_ec *e, + const struct crypto_ec_point *pub) +{ + mbedtls_ecp_group_id grp_id = ((mbedtls_ecp_group *)e)->id; + mbedtls_ecp_point *p = (mbedtls_ecp_point *)pub; + return crypto_ec_key_set_pub_point_for_group(grp_id, p, NULL, 0); +} + + +struct crypto_ec_key * crypto_ec_key_gen(int group) +{ + mbedtls_pk_context *ctx = os_malloc(sizeof(*ctx)); + if (ctx == NULL) + return NULL; + mbedtls_pk_init(ctx); + if (crypto_mbedtls_keypair_gen(group, ctx) == 0) + return (struct crypto_ec_key *)ctx; + mbedtls_pk_free(ctx); + os_free(ctx); + return NULL; +} + +#endif /* CRYPTO_MBEDTLS_CRYPTO_EC_DPP */ + +void crypto_ec_key_deinit(struct crypto_ec_key *key) +{ + mbedtls_pk_free((mbedtls_pk_context *)key); + os_free(key); +} + +struct wpabuf * crypto_ec_key_get_subject_public_key(struct crypto_ec_key *key) +{ + /* (similar to crypto_ec_key_get_pubkey_point(), + * but compressed point format and ASN.1 DER wrapping)*/ +#ifndef MBEDTLS_PK_ECP_PUB_DER_MAX_BYTES /*(mbedtls/library/pkwrite.h)*/ +#define MBEDTLS_PK_ECP_PUB_DER_MAX_BYTES ( 30 + 2 * MBEDTLS_ECP_MAX_BYTES ) +#endif + unsigned char buf[MBEDTLS_PK_ECP_PUB_DER_MAX_BYTES]; + int len = mbedtls_pk_write_pubkey_der((mbedtls_pk_context *)key, + buf, sizeof(buf)); + if (len < 0) + return NULL; + /* Note: data is written at the end of the buffer! Use the + * return value to determine where you should start + * using the buffer */ + unsigned char *p = buf+sizeof(buf)-len; + + #ifdef MBEDTLS_ECP_SHORT_WEIERSTRASS_ENABLED + mbedtls_ecp_keypair *ecp_kp = mbedtls_pk_ec(*(mbedtls_pk_context *)key); + if (ecp_kp == NULL) + return NULL; + mbedtls_ecp_group *grp = &ecp_kp->MBEDTLS_PRIVATE(grp); + /* Note: sae_pk.c expects pubkey point in compressed format, + * but mbedtls_pk_write_pubkey_der() writes uncompressed format. + * Manually translate format and update lengths in DER format */ + if (mbedtls_ecp_get_type(grp) == MBEDTLS_ECP_TYPE_SHORT_WEIERSTRASS) { + unsigned char *end = buf+sizeof(buf); + size_t n; + /* SubjectPublicKeyInfo SEQUENCE */ + mbedtls_asn1_get_tag(&p, end, &n, + MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE); + /* algorithm AlgorithmIdentifier */ + unsigned char *a = p; + size_t alen; + mbedtls_asn1_get_tag(&p, end, &alen, + MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE); + p += alen; + alen = (size_t)(p - a); + /* subjectPublicKey BIT STRING */ + mbedtls_asn1_get_tag(&p, end, &n, MBEDTLS_ASN1_BIT_STRING); + /* rewrite into compressed point format and rebuild ASN.1 */ + p[1] = (buf[sizeof(buf)-1] & 1) ? 0x03 : 0x02; + n = 1 + 1 + (n-2)/2; + len = mbedtls_asn1_write_len(&p, buf, n) + (int)n; + len += mbedtls_asn1_write_tag(&p, buf, MBEDTLS_ASN1_BIT_STRING); + os_memmove(p-alen, a, alen); + len += alen; + p -= alen; + len += mbedtls_asn1_write_len(&p, buf, (size_t)len); + len += mbedtls_asn1_write_tag(&p, buf, + MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE); + } + #endif + return wpabuf_alloc_copy(p, (size_t)len); +} + +#ifdef CRYPTO_MBEDTLS_CRYPTO_EC_DPP + +struct wpabuf * crypto_ec_key_get_ecprivate_key(struct crypto_ec_key *key, + bool include_pub) +{ +#ifndef MBEDTLS_PK_ECP_PRV_DER_MAX_BYTES /*(mbedtls/library/pkwrite.h)*/ +#define MBEDTLS_PK_ECP_PRV_DER_MAX_BYTES ( 29 + 3 * MBEDTLS_ECP_MAX_BYTES ) +#endif + unsigned char priv[MBEDTLS_PK_ECP_PRV_DER_MAX_BYTES]; + int privlen = mbedtls_pk_write_key_der((mbedtls_pk_context *)key, + priv, sizeof(priv)); + if (privlen < 0) + return NULL; + + struct wpabuf *wbuf; + + /* Note: data is written at the end of the buffer! Use the + * return value to determine where you should start + * using the buffer */ + /* mbedtls_pk_write_key_der() includes publicKey in DER */ + if (include_pub) + wbuf = wpabuf_alloc_copy(priv+sizeof(priv)-privlen, privlen); + else { + /* calculate publicKey offset and skip from end of buffer */ + unsigned char *p = priv+sizeof(priv)-privlen; + unsigned char *end = priv+sizeof(priv); + size_t len; + /* ECPrivateKey SEQUENCE */ + mbedtls_asn1_get_tag(&p, end, &len, + MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE); + /* version INTEGER */ + unsigned char *v = p; + mbedtls_asn1_get_tag(&p, end, &len, MBEDTLS_ASN1_INTEGER); + p += len; + /* privateKey OCTET STRING */ + mbedtls_asn1_get_tag(&p, end, &len, MBEDTLS_ASN1_OCTET_STRING); + p += len; + /* parameters ECParameters */ + mbedtls_asn1_get_tag(&p, end, &len, + MBEDTLS_ASN1_CONTEXT_SPECIFIC | MBEDTLS_ASN1_CONSTRUCTED); + p += len; + + /* write new SEQUENCE header (we know that it fits in priv[]) */ + len = (size_t)(p - v); + p = v; + len += mbedtls_asn1_write_len(&p, priv, len); + len += mbedtls_asn1_write_tag(&p, priv, + MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE); + wbuf = wpabuf_alloc_copy(p, len); + } + + forced_memzero(priv, sizeof(priv)); + return wbuf; +} + +struct wpabuf * crypto_ec_key_get_pubkey_point(struct crypto_ec_key *key, + int prefix) +{ + /*(similarities to crypto_ecdh_get_pubkey(), but different struct)*/ + mbedtls_ecp_keypair *ecp_kp = mbedtls_pk_ec(*(mbedtls_pk_context *)key); + if (ecp_kp == NULL) + return NULL; + mbedtls_ecp_group *grp = &ecp_kp->MBEDTLS_PRIVATE(grp); + size_t len = CRYPTO_EC_plen(grp); + #ifdef MBEDTLS_ECP_MONTGOMERY_ENABLED + /* len */ + #endif + #ifdef MBEDTLS_ECP_SHORT_WEIERSTRASS_ENABLED + if (mbedtls_ecp_get_type(grp) == MBEDTLS_ECP_TYPE_SHORT_WEIERSTRASS) + len = len*2+1; + #endif + struct wpabuf *buf = wpabuf_alloc(len); + if (buf == NULL) + return NULL; + mbedtls_ecp_point *ecp_kp_Q = &ecp_kp->MBEDTLS_PRIVATE(Q); + if (mbedtls_ecp_point_write_binary(grp, ecp_kp_Q, + MBEDTLS_ECP_PF_UNCOMPRESSED, &len, + wpabuf_mhead_u8(buf), len) == 0) { + if (!prefix) /* Remove 0x04 prefix if requested */ + os_memmove(wpabuf_mhead(buf),wpabuf_mhead(buf)+1,--len); + wpabuf_put(buf, len); + return buf; + } + + wpabuf_free(buf); + return NULL; +} + +struct crypto_ec_point * +crypto_ec_key_get_public_key(struct crypto_ec_key *key) +{ + mbedtls_ecp_keypair *ecp_kp = mbedtls_pk_ec(*(mbedtls_pk_context *)key); + if (ecp_kp == NULL) + return NULL; + mbedtls_ecp_point *p = os_malloc(sizeof(*p)); + if (p != NULL) { + /*(mbedtls_ecp_export() uses &ecp_kp->MBEDTLS_PRIVATE(grp))*/ + mbedtls_ecp_point_init(p); + mbedtls_ecp_point *ecp_kp_Q = &ecp_kp->MBEDTLS_PRIVATE(Q); + if (mbedtls_ecp_copy(p, ecp_kp_Q)) { + mbedtls_ecp_point_free(p); + os_free(p); + p = NULL; + } + } + return (struct crypto_ec_point *)p; +} + +struct crypto_bignum * +crypto_ec_key_get_private_key(struct crypto_ec_key *key) +{ + mbedtls_ecp_keypair *ecp_kp = mbedtls_pk_ec(*(mbedtls_pk_context *)key); + if (ecp_kp == NULL) + return NULL; + mbedtls_mpi *bn = os_malloc(sizeof(*bn)); + if (bn) { + /*(mbedtls_ecp_export() uses &ecp_kp->MBEDTLS_PRIVATE(grp))*/ + mbedtls_mpi_init(bn); + mbedtls_mpi *ecp_kp_d = &ecp_kp->MBEDTLS_PRIVATE(d); + if (mbedtls_mpi_copy(bn, ecp_kp_d)) { + mbedtls_mpi_free(bn); + os_free(bn); + bn = NULL; + } + } + return (struct crypto_bignum *)bn; +} + +#endif /* CRYPTO_MBEDTLS_CRYPTO_EC_DPP */ + +static mbedtls_md_type_t crypto_ec_key_sign_md(size_t len) +{ + /* get mbedtls_md_type_t from length of hash data to be signed */ + switch (len) { + case 64: return MBEDTLS_MD_SHA512; + case 48: return MBEDTLS_MD_SHA384; + case 32: return MBEDTLS_MD_SHA256; + case 20: return MBEDTLS_MD_SHA1; + case 16: return MBEDTLS_MD_MD5; + default: return MBEDTLS_MD_NONE; + } +} + +struct wpabuf * crypto_ec_key_sign(struct crypto_ec_key *key, const u8 *data, + size_t len) +{ + #ifndef MBEDTLS_PK_SIGNATURE_MAX_SIZE /*(defined since mbedtls 2.20.0)*/ + #if MBEDTLS_ECDSA_MAX_LEN > MBEDTLS_MPI_MAX_SIZE + #define MBEDTLS_PK_SIGNATURE_MAX_SIZE MBEDTLS_ECDSA_MAX_LEN + #else + #define MBEDTLS_PK_SIGNATURE_MAX_SIZE MBEDTLS_MPI_MAX_SIZE + #endif + #endif + size_t sig_len = MBEDTLS_PK_SIGNATURE_MAX_SIZE; + struct wpabuf *buf = wpabuf_alloc(sig_len); + if (buf == NULL) + return NULL; + if (mbedtls_pk_sign((mbedtls_pk_context *)key, + crypto_ec_key_sign_md(len), data, len, + wpabuf_mhead_u8(buf), + #if MBEDTLS_VERSION_NUMBER >= 0x03000000 /* mbedtls 3.0.0 */ + sig_len, + #endif + &sig_len, + mbedtls_ctr_drbg_random, + crypto_mbedtls_ctr_drbg()) == 0) { + wpabuf_put(buf, sig_len); + return buf; + } + + wpabuf_free(buf); + return NULL; +} + +#ifdef CRYPTO_MBEDTLS_CRYPTO_EC_DPP +struct wpabuf * crypto_ec_key_sign_r_s(struct crypto_ec_key *key, + const u8 *data, size_t len) +{ + mbedtls_ecp_keypair *ecp_kp = mbedtls_pk_ec(*(mbedtls_pk_context *)key); + if (ecp_kp == NULL) + return NULL; + + size_t sig_len = MBEDTLS_ECDSA_MAX_LEN; + u8 buf[MBEDTLS_ECDSA_MAX_LEN]; + if (mbedtls_ecdsa_write_signature(ecp_kp, crypto_ec_key_sign_md(len), + data, len, buf, + #if MBEDTLS_VERSION_NUMBER >= 0x03000000 /* mbedtls 3.0.0 */ + sig_len, + #endif + &sig_len, + mbedtls_ctr_drbg_random, + crypto_mbedtls_ctr_drbg())) { + return NULL; + } + + /*(mbedtls_ecdsa_write_signature() writes signature in ASN.1)*/ + /* parse ASN.1 to get r and s and lengths */ + u8 *p = buf, *r, *s; + u8 *end = p + sig_len; + size_t rlen, slen; + mbedtls_asn1_get_tag(&p, end, &rlen, + MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE); + mbedtls_asn1_get_tag(&p, end, &rlen, MBEDTLS_ASN1_INTEGER); + r = p; + p += rlen; + mbedtls_asn1_get_tag(&p, end, &slen, MBEDTLS_ASN1_INTEGER); + s = p; + + /* write raw r and s into out + * (including removal of leading 0 if added for ASN.1 integer) + * note: DPP caller expects raw r, s each padded to prime len */ + mbedtls_ecp_group *ecp_kp_grp = &ecp_kp->MBEDTLS_PRIVATE(grp); + size_t plen = CRYPTO_EC_plen(ecp_kp_grp); + if (rlen > plen) { + r += (rlen - plen); + rlen = plen; + } + if (slen > plen) { + s += (slen - plen); + slen = plen; + } + struct wpabuf *out = wpabuf_alloc(plen*2); + if (out) { + wpabuf_put(out, plen*2); + p = wpabuf_mhead_u8(out); + os_memset(p, 0, plen*2); + os_memcpy(p+plen*1-rlen, r, rlen); + os_memcpy(p+plen*2-slen, s, slen); + } + return out; +} +#endif /* CRYPTO_MBEDTLS_CRYPTO_EC_DPP */ + +int crypto_ec_key_verify_signature(struct crypto_ec_key *key, const u8 *data, + size_t len, const u8 *sig, size_t sig_len) +{ + switch (mbedtls_pk_verify((mbedtls_pk_context *)key, + crypto_ec_key_sign_md(len), data, len, + sig, sig_len)) { + case 0: + /*case MBEDTLS_ERR_ECP_SIG_LEN_MISMATCH:*//* XXX: allow? */ + return 1; + case MBEDTLS_ERR_ECP_VERIFY_FAILED: + return 0; + default: + return -1; + } +} + +#ifdef CRYPTO_MBEDTLS_CRYPTO_EC_DPP +int crypto_ec_key_verify_signature_r_s(struct crypto_ec_key *key, + const u8 *data, size_t len, + const u8 *r, size_t r_len, + const u8 *s, size_t s_len) +{ + /* reimplement mbedtls_ecdsa_read_signature() without encoding r and s + * into ASN.1 just for mbedtls_ecdsa_read_signature() to decode ASN.1 */ + mbedtls_ecp_keypair *ecp_kp = mbedtls_pk_ec(*(mbedtls_pk_context *)key); + if (ecp_kp == NULL) + return -1; + mbedtls_ecp_group *ecp_kp_grp = &ecp_kp->MBEDTLS_PRIVATE(grp); + mbedtls_ecp_point *ecp_kp_Q = &ecp_kp->MBEDTLS_PRIVATE(Q); + + mbedtls_mpi mpi_r; + mbedtls_mpi mpi_s; + mbedtls_mpi_init(&mpi_r); + mbedtls_mpi_init(&mpi_s); + int ret = mbedtls_mpi_read_binary(&mpi_r, r, r_len) + || mbedtls_mpi_read_binary(&mpi_s, s, s_len) ? -1 : 0; + if (ret == 0) { + ret = mbedtls_ecdsa_verify(ecp_kp_grp, data, len, + ecp_kp_Q, &mpi_r, &mpi_s); + ret = ret ? ret == MBEDTLS_ERR_ECP_BAD_INPUT_DATA ? 0 : -1 : 1; + } + mbedtls_mpi_free(&mpi_r); + mbedtls_mpi_free(&mpi_s); + return ret; +} +#endif /* CRYPTO_MBEDTLS_CRYPTO_EC_DPP */ + +int crypto_ec_key_group(struct crypto_ec_key *key) +{ + mbedtls_ecp_keypair *ecp_kp = mbedtls_pk_ec(*(mbedtls_pk_context *)key); + if (ecp_kp == NULL) + return -1; + mbedtls_ecp_group *ecp_group = &ecp_kp->MBEDTLS_PRIVATE(grp); + return crypto_mbedtls_ike_id_from_ecp_group_id(ecp_group->id); +} + +#ifdef CRYPTO_MBEDTLS_CRYPTO_EC_DPP + +int crypto_ec_key_cmp(struct crypto_ec_key *key1, struct crypto_ec_key *key2) +{ +#if 0 /*(DPP is passing two public keys; unable to use pk_check_pair())*/ + #if MBEDTLS_VERSION_NUMBER < 0x03000000 /* mbedtls 3.0.0 */ + return mbedtls_pk_check_pair((const mbedtls_pk_context *)key1, + (const mbedtls_pk_context *)key2) ? -1 : 0; + #else + return mbedtls_pk_check_pair((const mbedtls_pk_context *)key1, + (const mbedtls_pk_context *)key2, + mbedtls_ctr_drbg_random, + crypto_mbedtls_ctr_drbg()) ? -1 : 0; + #endif +#else + mbedtls_ecp_keypair *ecp_kp1=mbedtls_pk_ec(*(mbedtls_pk_context *)key1); + mbedtls_ecp_keypair *ecp_kp2=mbedtls_pk_ec(*(mbedtls_pk_context *)key2); + if (ecp_kp1 == NULL || ecp_kp2 == NULL) + return -1; + mbedtls_ecp_group *ecp_kp1_grp = &ecp_kp1->MBEDTLS_PRIVATE(grp); + mbedtls_ecp_group *ecp_kp2_grp = &ecp_kp2->MBEDTLS_PRIVATE(grp); + mbedtls_ecp_point *ecp_kp1_Q = &ecp_kp1->MBEDTLS_PRIVATE(Q); + mbedtls_ecp_point *ecp_kp2_Q = &ecp_kp2->MBEDTLS_PRIVATE(Q); + return ecp_kp1_grp->id != ecp_kp2_grp->id + || mbedtls_ecp_point_cmp(ecp_kp1_Q, ecp_kp2_Q) ? -1 : 0; +#endif +} + +void crypto_ec_key_debug_print(const struct crypto_ec_key *key, + const char *title) +{ + /* TBD: what info is desirable here and in what human readable format?*/ + /*(crypto_openssl.c prints a human-readably public key and attributes)*/ + #if 0 + struct mbedtls_pk_debug_item debug_item; + if (mbedtls_pk_debug((const mbedtls_pk_context *)key, &debug_item)) + return; + /* ... */ + #endif + wpa_printf(MSG_DEBUG, "%s: %s not implemented", title, __func__); +} + +#endif /* CRYPTO_MBEDTLS_CRYPTO_EC_DPP */ + +#endif /* CRYPTO_MBEDTLS_CRYPTO_EC */ + + +#ifdef CRYPTO_MBEDTLS_CRYPTO_CSR + +#include +#include + +struct crypto_csr * crypto_csr_init(void) +{ + mbedtls_x509write_csr *csr = os_malloc(sizeof(*csr)); + if (csr != NULL) + mbedtls_x509write_csr_init(csr); + return (struct crypto_csr *)csr; +} + +struct crypto_csr * crypto_csr_verify(const struct wpabuf *req) +{ + /* future: look for alternatives to MBEDTLS_PRIVATE() access */ + + /* sole caller src/common/dpp_crypto.c:dpp_validate_csr() + * uses (mbedtls_x509_csr *) to obtain CSR_ATTR_CHALLENGE_PASSWORD + * so allocate different object (mbedtls_x509_csr *) and special-case + * object when used in crypto_csr_get_attribute() and when free()d in + * crypto_csr_deinit(). */ + + mbedtls_x509_csr *csr = os_malloc(sizeof(*csr)); + if (csr == NULL) + return NULL; + mbedtls_x509_csr_init(csr); + const mbedtls_md_info_t *md_info; + unsigned char digest[MBEDTLS_MD_MAX_SIZE]; + if (mbedtls_x509_csr_parse_der(csr,wpabuf_head(req),wpabuf_len(req))==0 + && (md_info=mbedtls_md_info_from_type(csr->MBEDTLS_PRIVATE(sig_md))) + != NULL + && mbedtls_md(md_info, csr->cri.p, csr->cri.len, digest) == 0) { + switch (mbedtls_pk_verify(&csr->pk,csr->MBEDTLS_PRIVATE(sig_md), + digest, mbedtls_md_get_size(md_info), + csr->MBEDTLS_PRIVATE(sig).p, + csr->MBEDTLS_PRIVATE(sig).len)) { + case 0: + /*case MBEDTLS_ERR_ECP_SIG_LEN_MISMATCH:*//* XXX: allow? */ + return (struct crypto_csr *)((uintptr_t)csr | 1uL); + default: + break; + } + } + + mbedtls_x509_csr_free(csr); + os_free(csr); + return NULL; +} + +void crypto_csr_deinit(struct crypto_csr *csr) +{ + if ((uintptr_t)csr & 1uL) { + csr = (struct crypto_csr *)((uintptr_t)csr & ~1uL); + mbedtls_x509_csr_free((mbedtls_x509_csr *)csr); + } + else + mbedtls_x509write_csr_free((mbedtls_x509write_csr *)csr); + os_free(csr); +} + +int crypto_csr_set_ec_public_key(struct crypto_csr *csr, + struct crypto_ec_key *key) +{ + mbedtls_x509write_csr_set_key((mbedtls_x509write_csr *)csr, + (mbedtls_pk_context *)key); + return 0; +} + +int crypto_csr_set_name(struct crypto_csr *csr, enum crypto_csr_name type, + const char *name) +{ + /* specialized for src/common/dpp_crypto.c */ + + /* sole caller src/common/dpp_crypto.c:dpp_build_csr() + * calls this function only once, using type == CSR_NAME_CN + * (If called more than once, this code would need to append + * components to the subject name, which we could do by + * appending to (mbedtls_x509write_csr *) private member + * mbedtls_asn1_named_data *MBEDTLS_PRIVATE(subject)) */ + + const char *label; + switch (type) { + case CSR_NAME_CN: label = "CN="; break; + case CSR_NAME_SN: label = "SN="; break; + case CSR_NAME_C: label = "C="; break; + case CSR_NAME_O: label = "O="; break; + case CSR_NAME_OU: label = "OU="; break; + default: return -1; + } + + size_t len = strlen(name); + struct wpabuf *buf = wpabuf_alloc(3+len+1); + if (buf == NULL) + return -1; + wpabuf_put_data(buf, label, strlen(label)); + wpabuf_put_data(buf, name, len+1); /*(include trailing '\0')*/ + /* Note: 'name' provided is set as given and should be backslash-escaped + * by caller when necessary, e.g. literal ',' which are not separating + * components should be backslash-escaped */ + + int ret = + mbedtls_x509write_csr_set_subject_name((mbedtls_x509write_csr *)csr, + wpabuf_head(buf)) ? -1 : 0; + wpabuf_free(buf); + return ret; +} + +/* OBJ_pkcs9_challengePassword 1 2 840 113549 1 9 7 */ +static const char OBJ_pkcs9_challengePassword[] = MBEDTLS_OID_PKCS9 "\x07"; + +int crypto_csr_set_attribute(struct crypto_csr *csr, enum crypto_csr_attr attr, + int attr_type, const u8 *value, size_t len) +{ + /* specialized for src/common/dpp_crypto.c */ + /* sole caller src/common/dpp_crypto.c:dpp_build_csr() passes + * attr == CSR_ATTR_CHALLENGE_PASSWORD + * attr_type == ASN1_TAG_UTF8STRING */ + + const char *oid; + size_t oid_len; + switch (attr) { + case CSR_ATTR_CHALLENGE_PASSWORD: + oid = OBJ_pkcs9_challengePassword; + oid_len = sizeof(OBJ_pkcs9_challengePassword)-1; + break; + default: + return -1; + } + + #if 0 /*(incorrect; sets an extension, not an attribute)*/ + return mbedtls_x509write_csr_set_extension((mbedtls_x509write_csr *)csr, + oid, oid_len, + #if MBEDTLS_VERSION_NUMBER >= 0x03000000 /* mbedtls 3.0.0 */ + 0, /*(critical flag)*/ + #endif + value, len) ? -1 : 0; + #else + (void)oid; + (void)oid_len; + #endif + + /* mbedtls does not currently provide way to set an attribute in a CSR: + * https://github.com/Mbed-TLS/mbedtls/issues/4886 */ + wpa_printf(MSG_ERROR, + "mbedtls does not currently support setting challengePassword " + "attribute in CSR"); + return -1; +} + +const u8 * mbedtls_x509_csr_attr_oid_value(mbedtls_x509_csr *csr, + const char *oid, size_t oid_len, + size_t *vlen, int *vtype) +{ + /* Note: mbedtls_x509_csr_parse_der() has parsed and validated CSR, + * so validation checks are not repeated here + * + * It would be nicer if (mbedtls_x509_csr *) had an mbedtls_x509_buf of + * Attributes (or at least a pointer) since mbedtls_x509_csr_parse_der() + * already parsed the rest of CertificationRequestInfo, some of which is + * repeated here to step to Attributes. Since csr->subject_raw.p points + * into csr->cri.p, which points into csr->raw.p, step over version and + * subject of CertificationRequestInfo (SEQUENCE) */ + unsigned char *p = csr->subject_raw.p + csr->subject_raw.len; + unsigned char *end = csr->cri.p + csr->cri.len, *ext; + size_t len; + + /* step over SubjectPublicKeyInfo */ + mbedtls_asn1_get_tag(&p, end, &len, + MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE); + p += len; + + /* Attributes + * { ATTRIBUTE:IOSet } ::= SET OF { SEQUENCE { OID, value } } + */ + if (mbedtls_asn1_get_tag(&p, end, &len, + MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_CONTEXT_SPECIFIC) != 0) { + return NULL; + } + while (p < end) { + if (mbedtls_asn1_get_tag(&p, end, &len, + MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE) != 0) { + return NULL; + } + ext = p; + p += len; + + if (mbedtls_asn1_get_tag(&ext,end,&len,MBEDTLS_ASN1_OID) != 0) + return NULL; + if (oid_len != len || 0 != memcmp(ext, oid, oid_len)) + continue; + + /* found oid; return value */ + *vtype = *ext++; /* tag */ + return (mbedtls_asn1_get_len(&ext,end,vlen) == 0) ? ext : NULL; + } + + return NULL; +} + +const u8 * crypto_csr_get_attribute(struct crypto_csr *csr, + enum crypto_csr_attr attr, + size_t *len, int *type) +{ + /* specialized for src/common/dpp_crypto.c */ + /* sole caller src/common/dpp_crypto.c:dpp_build_csr() passes + * attr == CSR_ATTR_CHALLENGE_PASSWORD */ + + const char *oid; + size_t oid_len; + switch (attr) { + case CSR_ATTR_CHALLENGE_PASSWORD: + oid = OBJ_pkcs9_challengePassword; + oid_len = sizeof(OBJ_pkcs9_challengePassword)-1; + break; + default: + return NULL; + } + + /* see crypto_csr_verify(); expecting (mbedtls_x509_csr *) tagged |=1 */ + if (!((uintptr_t)csr & 1uL)) + return NULL; + csr = (struct crypto_csr *)((uintptr_t)csr & ~1uL); + + return mbedtls_x509_csr_attr_oid_value((mbedtls_x509_csr *)csr, + oid, oid_len, len, type); +} + +struct wpabuf * crypto_csr_sign(struct crypto_csr *csr, + struct crypto_ec_key *key, + enum crypto_hash_alg algo) +{ + mbedtls_md_type_t sig_md; + switch (algo) { + #ifdef MBEDTLS_SHA256_C + case CRYPTO_HASH_ALG_SHA256: sig_md = MBEDTLS_MD_SHA256; break; + #endif + #ifdef MBEDTLS_SHA512_C + case CRYPTO_HASH_ALG_SHA384: sig_md = MBEDTLS_MD_SHA384; break; + case CRYPTO_HASH_ALG_SHA512: sig_md = MBEDTLS_MD_SHA512; break; + #endif + default: + return NULL; + } + mbedtls_x509write_csr_set_md_alg((mbedtls_x509write_csr *)csr, sig_md); + + #if 0 + unsigned char key_usage = MBEDTLS_X509_KU_DIGITAL_SIGNATURE + | MBEDTLS_X509_KU_KEY_CERT_SIGN; + if (mbedtls_x509write_csr_set_key_usage((mbedtls_x509write_csr *)csr, + key_usage)) + return NULL; + #endif + + #if 0 + unsigned char ns_cert_type = MBEDTLS_X509_NS_CERT_TYPE_SSL_CLIENT + | MBEDTLS_X509_NS_CERT_TYPE_EMAIL; + if (mbedtls_x509write_csr_set_ns_cert_type((mbedtls_x509write_csr *)csr, + ns_cert_type)) + return NULL; + #endif + + #if 0 + /* mbedtls does not currently provide way to set an attribute in a CSR: + * https://github.com/Mbed-TLS/mbedtls/issues/4886 + * XXX: hwsim dpp_enterprise test fails due to this limitation. + * + * Current usage of this function is solely by dpp_build_csr(), + * so as a kludge, might consider custom (struct crypto_csr *) + * containing (mbedtls_x509write_csr *) and a list of attributes + * (i.e. challengePassword). Might have to totally reimplement + * mbedtls_x509write_csr_der(); underlying x509write_csr_der_internal() + * handles signing the CSR. (This is more work that appending an + * Attributes section to end of CSR and adjusting ASN.1 length of CSR.) + */ + #endif + + unsigned char buf[4096]; /* XXX: large enough? too large? */ + int len = mbedtls_x509write_csr_der((mbedtls_x509write_csr *)csr, + buf, sizeof(buf), + mbedtls_ctr_drbg_random, + crypto_mbedtls_ctr_drbg()); + if (len < 0) + return NULL; + /* Note: data is written at the end of the buffer! Use the + * return value to determine where you should start + * using the buffer */ + return wpabuf_alloc_copy(buf+sizeof(buf)-len, (size_t)len); +} + +#endif /* CRYPTO_MBEDTLS_CRYPTO_CSR */ + + +#ifdef CRYPTO_MBEDTLS_CRYPTO_PKCS7 + +#if 0 +#include /* PKCS7 is not currently supported in mbedtls */ +#include +#endif + +struct wpabuf * crypto_pkcs7_get_certificates(const struct wpabuf *pkcs7) +{ + /* PKCS7 is not currently supported in mbedtls */ + return NULL; + +#if 0 + /* https://github.com/naynajain/mbedtls-1 branch: development-pkcs7 + * (??? potential future contribution to mbedtls ???) */ + + /* Note: PKCS7 signature *is not* verified by this function. + * The function interface does not provide for passing a certificate */ + + mbedtls_pkcs7 mpkcs7; + mbedtls_pkcs7_init(&mpkcs7); + int pkcs7_type = mbedtls_pkcs7_parse_der(wpabuf_head(pkcs7), + wpabuf_len(pkcs7), + &mpkcs7); + wpabuf *buf = NULL; + do { + if (pkcs7_type < 0) + break; + + /* src/common/dpp.c:dpp_parse_cred_dot1x() interested in certs + * for wpa_supplicant/dpp_supplicant.c:wpas_dpp_add_network() + * (? are adding certificate headers and footers desired ?) */ + + /* development-pkcs7 branch does not currently provide + * additional interfaces to retrieve the parsed data */ + + mbedtls_x509_crt *certs = + &mpkcs7.MBEDTLS_PRIVATE(signed_data).MBEDTLS_PRIVATE(certs); + int ncerts = + mpkcs7.MBEDTLS_PRIVATE(signed_data).MBEDTLS_PRIVATE(no_of_certs); + + /* allocate buffer for PEM (base64-encoded DER) + * plus header, footer, newlines, and some extra */ + buf = wpabuf_alloc((wpabuf_len(pkcs7)+2)/3*4 + ncerts*64); + if (buf == NULL) + break; + + #define PEM_BEGIN_CRT "-----BEGIN CERTIFICATE-----\n" + #define PEM_END_CRT "-----END CERTIFICATE-----\n" + size_t olen; + for (int i = 0; i < ncerts; ++i) { + int ret = mbedtls_pem_write_buffer( + PEM_BEGIN_CRT, PEM_END_CRT, + certs[i].raw.p, certs[i].raw.len, + wpabuf_mhead(buf, 0), wpabuf_tailroom(buf), + &olen)); + if (ret == 0) + wpabuf_put(buf, olen); + } else { + if (ret == MBEDTLS_ERR_BASE64_BUFFER_TOO_SMALL) + ret = wpabuf_resize( + &buf,olen-wpabuf_tailroom(buf)); + if (ret == 0) { + --i;/*(adjust loop iterator for retry)*/ + continue; + } + wpabuf_free(buf); + buf = NULL; + break; + } + } + } while (0); + + mbedtls_pkcs7_free(&mpkcs7); + return buf; +#endif +} + +#endif /* CRYPTO_MBEDTLS_CRYPTO_PKCS7 */ + + +#ifdef MBEDTLS_ARC4_C +#include +int rc4_skip(const u8 *key, size_t keylen, size_t skip, + u8 *data, size_t data_len) +{ + mbedtls_arc4_context ctx; + mbedtls_arc4_init(&ctx); + mbedtls_arc4_setup(&ctx, key, keylen); + + if (skip) { + /*(prefer [16] on ancient hardware with smaller cache lines)*/ + unsigned char skip_buf[64]; /*('skip' is generally small)*/ + /*os_memset(skip_buf, 0, sizeof(skip_buf));*/ /*(necessary?)*/ + size_t len; + do { + len = skip > sizeof(skip_buf) ? sizeof(skip_buf) : skip; + mbedtls_arc4_crypt(&ctx, len, skip_buf, skip_buf); + } while ((skip -= len)); + } + + int ret = mbedtls_arc4_crypt(&ctx, data_len, data, data); + mbedtls_arc4_free(&ctx); + return ret; +} +#endif + + +/* duplicated in tls_mbedtls.c:tls_mbedtls_readfile()*/ +__attribute_noinline__ +static int crypto_mbedtls_readfile(const char *path, u8 **buf, size_t *n) +{ + #if 0 /* #ifdef MBEDTLS_FS_IO */ + /*(includes +1 for '\0' needed by mbedtls PEM parsing funcs)*/ + if (mbedtls_pk_load_file(path, (unsigned char **)buf, n) != 0) { + wpa_printf(MSG_ERROR, "error: mbedtls_pk_load_file %s", path); + return -1; + } + #else + /*(use os_readfile() so that we can use os_free() + *(if we use mbedtls_pk_load_file() above, macros prevent calling free() + * directly #if defined(OS_REJECT_C_LIB_FUNCTIONS) and calling os_free() + * on buf aborts in tests if buf not allocated via os_malloc())*/ + *buf = (u8 *)os_readfile(path, n); + if (!*buf) { + wpa_printf(MSG_ERROR, "error: os_readfile %s", path); + return -1; + } + u8 *buf0 = os_realloc(*buf, *n+1); + if (!buf0) { + bin_clear_free(*buf, *n); + *buf = NULL; + return -1; + } + buf0[(*n)++] = '\0'; + *buf = buf0; + #endif + return 0; +} + + +#ifdef CRYPTO_MBEDTLS_CRYPTO_RSA +#ifdef MBEDTLS_RSA_C + +#include +#include + +struct crypto_rsa_key * crypto_rsa_key_read(const char *file, bool private_key) +{ + /* mbedtls_pk_parse_keyfile() and mbedtls_pk_parse_public_keyfile() + * require #ifdef MBEDTLS_FS_IO in mbedtls library. Prefer to use + * crypto_mbedtls_readfile(), which wraps os_readfile() */ + u8 *data; + size_t len; + if (crypto_mbedtls_readfile(file, &data, &len) != 0) + return NULL; + + mbedtls_pk_context *ctx = os_malloc(sizeof(*ctx)); + if (ctx == NULL) { + bin_clear_free(data, len); + return NULL; + } + mbedtls_pk_init(ctx); + + int rc; + rc = (private_key + ? mbedtls_pk_parse_key(ctx, data, len, NULL, 0 + #if MBEDTLS_VERSION_NUMBER >= 0x03000000 /* mbedtls 3.0.0 */ + ,mbedtls_ctr_drbg_random, + crypto_mbedtls_ctr_drbg() + #endif + ) + : mbedtls_pk_parse_public_key(ctx, data, len)) == 0 + && mbedtls_pk_can_do(ctx, MBEDTLS_PK_RSA); + + bin_clear_free(data, len); + + if (rc) { + /* use MBEDTLS_RSA_PKCS_V21 padding for RSAES-OAEP */ + /* use MBEDTLS_MD_SHA256 for these hostap interfaces */ + #if MBEDTLS_VERSION_NUMBER < 0x03000000 /* mbedtls 3.0.0 */ + /*(no return value in mbedtls 2.x)*/ + mbedtls_rsa_set_padding(mbedtls_pk_rsa(*ctx), + MBEDTLS_RSA_PKCS_V21, + MBEDTLS_MD_SHA256); + #else + if (mbedtls_rsa_set_padding(mbedtls_pk_rsa(*ctx), + MBEDTLS_RSA_PKCS_V21, + MBEDTLS_MD_SHA256) == 0) + #endif + return (struct crypto_rsa_key *)ctx; + } + + mbedtls_pk_free(ctx); + os_free(ctx); + return NULL; +} + +struct wpabuf * crypto_rsa_oaep_sha256_encrypt(struct crypto_rsa_key *key, + const struct wpabuf *in) +{ + mbedtls_rsa_context *pk_rsa = mbedtls_pk_rsa(*(mbedtls_pk_context*)key); + size_t olen = mbedtls_rsa_get_len(pk_rsa); + struct wpabuf *buf = wpabuf_alloc(olen); + if (buf == NULL) + return NULL; + + /* mbedtls_pk_encrypt() takes a few more hops to get to same func */ + if (mbedtls_rsa_rsaes_oaep_encrypt(pk_rsa, + mbedtls_ctr_drbg_random, + crypto_mbedtls_ctr_drbg(), + #if MBEDTLS_VERSION_NUMBER < 0x03000000 /* mbedtls 3.0.0 */ + MBEDTLS_RSA_PRIVATE, + #endif + NULL, 0, + wpabuf_len(in), wpabuf_head(in), + wpabuf_put(buf, olen)) == 0) { + return buf; + } + + wpabuf_clear_free(buf); + return NULL; +} + +struct wpabuf * crypto_rsa_oaep_sha256_decrypt(struct crypto_rsa_key *key, + const struct wpabuf *in) +{ + mbedtls_rsa_context *pk_rsa = mbedtls_pk_rsa(*(mbedtls_pk_context*)key); + size_t olen = mbedtls_rsa_get_len(pk_rsa); + struct wpabuf *buf = wpabuf_alloc(olen); + if (buf == NULL) + return NULL; + + /* mbedtls_pk_decrypt() takes a few more hops to get to same func */ + if (mbedtls_rsa_rsaes_oaep_decrypt(pk_rsa, + mbedtls_ctr_drbg_random, + crypto_mbedtls_ctr_drbg(), + #if MBEDTLS_VERSION_NUMBER < 0x03000000 /* mbedtls 3.0.0 */ + MBEDTLS_RSA_PUBLIC, + #endif + NULL, 0, &olen, wpabuf_head(in), + wpabuf_mhead(buf), olen) == 0) { + wpabuf_put(buf, olen); + return buf; + } + + wpabuf_clear_free(buf); + return NULL; +} + +void crypto_rsa_key_free(struct crypto_rsa_key *key) +{ + mbedtls_pk_free((mbedtls_pk_context *)key); + os_free(key); +} + +#endif /* MBEDTLS_RSA_C */ +#endif /* CRYPTO_MBEDTLS_CRYPTO_RSA */ + +#ifdef CRYPTO_MBEDTLS_CRYPTO_HPKE + +struct wpabuf * hpke_base_seal(enum hpke_kem_id kem_id, + enum hpke_kdf_id kdf_id, + enum hpke_aead_id aead_id, + struct crypto_ec_key *peer_pub, + const u8 *info, size_t info_len, + const u8 *aad, size_t aad_len, + const u8 *pt, size_t pt_len) +{ + /* not yet implemented */ + return NULL; +} + +struct wpabuf * hpke_base_open(enum hpke_kem_id kem_id, + enum hpke_kdf_id kdf_id, + enum hpke_aead_id aead_id, + struct crypto_ec_key *own_priv, + const u8 *info, size_t info_len, + const u8 *aad, size_t aad_len, + const u8 *enc_ct, size_t enc_ct_len) +{ + /* not yet implemented */ + return NULL; +} + +#endif --- /dev/null +++ b/src/crypto/tls_mbedtls.c @@ -0,0 +1,3313 @@ +/* + * SSL/TLS interface functions for mbed TLS + * + * SPDX-FileCopyrightText: 2022 Glenn Strauss + * SPDX-License-Identifier: BSD-3-Clause + * + * This software may be distributed under the terms of the BSD license. + * See README for more details. + * + * template: src/crypto/tls_none.c + * reference: src/crypto/tls_*.c + * + * Known Limitations: + * - no TLSv1.3 (not available in mbedtls 2.x; experimental in mbedtls 3.x) + * - no OCSP (not yet available in mbedtls) + * - mbedtls does not support all certificate encodings used by hwsim tests + * PCKS#5 v1.5 + * PCKS#12 + * DH DSA + * - EAP-FAST, EAP-TEAP session ticket support not implemented in tls_mbedtls.c + * - mbedtls does not currently provide way to set an attribute in a CSR + * https://github.com/Mbed-TLS/mbedtls/issues/4886 + * so tests/hwsim dpp_enterprise tests fail + * - DPP2 not supported + * PKCS#7 parsing is not supported in mbedtls + * See crypto_mbedtls.c:crypto_pkcs7_get_certificates() comments + * - DPP3 not supported + * hpke_base_seal() and hpke_base_seal() not implemented in crypto_mbedtls.c + * + * Status: + * - code written to be compatible with mbedtls 2.x and mbedtls 3.x + * (currently requires mbedtls >= 2.27.0 for mbedtls_mpi_random()) + * (currently requires mbedtls >= 2.18.0 for mbedtls_ssl_tls_prf()) + * - builds with tests/build/build-wpa_supplicant-mbedtls.config + * - passes all tests/ crypto module tests (incomplete coverage) + * ($ cd tests; make clean; make -j 4 run-tests CONFIG_TLS=mbedtls) + * - passes almost all tests/hwsim tests + * (hwsim tests skipped for missing features) + * + * RFE: + * - EAP-FAST, EAP-TEAP session ticket support not implemented in tls_mbedtls.c + * - client/server session resumption, and/or save client session ticket + */ + +#include "includes.h" +#include "common.h" + +#include +#include +#include +#include +#include +#include /* mbedtls_calloc() mbedtls_free() */ +#include /* mbedtls_platform_zeroize() */ +#include +#include +#include +#include + +#if MBEDTLS_VERSION_NUMBER >= 0x02040000 /* mbedtls 2.4.0 */ +#include +#else +#include +#endif + +#ifndef MBEDTLS_PRIVATE +#define MBEDTLS_PRIVATE(x) x +#endif + +#if MBEDTLS_VERSION_NUMBER < 0x03020000 /* mbedtls 3.2.0 */ +#define mbedtls_ssl_get_ciphersuite_id_from_ssl(ssl) \ + ((ssl)->MBEDTLS_PRIVATE(session) \ + ?(ssl)->MBEDTLS_PRIVATE(session)->MBEDTLS_PRIVATE(ciphersuite) \ + : 0) +#define mbedtls_ssl_ciphersuite_get_name(info) \ + (info)->MBEDTLS_PRIVATE(name) +#endif + +#include "crypto.h" /* sha256_vector() */ +#include "tls.h" + +#ifndef SHA256_DIGEST_LENGTH +#define SHA256_DIGEST_LENGTH 32 +#endif + +#ifndef MBEDTLS_EXPKEY_FIXED_SECRET_LEN +#define MBEDTLS_EXPKEY_FIXED_SECRET_LEN 48 +#endif + +#ifndef MBEDTLS_EXPKEY_RAND_LEN +#define MBEDTLS_EXPKEY_RAND_LEN 32 +#endif + +#if MBEDTLS_VERSION_NUMBER >= 0x03000000 /* mbedtls 3.0.0 */ +static mbedtls_ssl_export_keys_t tls_connection_export_keys_cb; +#elif MBEDTLS_VERSION_NUMBER >= 0x02120000 /* mbedtls 2.18.0 */ +static mbedtls_ssl_export_keys_ext_t tls_connection_export_keys_cb; +#else /*(not implemented; return error)*/ +#define mbedtls_ssl_tls_prf(a,b,c,d,e,f,g,h) (-1) +typedef mbedtls_tls_prf_types int; +#endif + + +/* hostapd/wpa_supplicant provides forced_memzero(), + * but prefer mbedtls_platform_zeroize() */ +#define forced_memzero(ptr,sz) mbedtls_platform_zeroize(ptr,sz) + + +#if defined(EAP_FAST) || defined(EAP_FAST_DYNAMIC) || defined(EAP_SERVER_FAST) \ + || defined(EAP_TEAP) || defined(EAP_SERVER_TEAP) +#ifdef MBEDTLS_SSL_SESSION_TICKETS +#ifdef MBEDTLS_SSL_TICKET_C +#define TLS_MBEDTLS_SESSION_TICKETS +#if defined(EAP_TEAP) || defined(EAP_SERVER_TEAP) +#define TLS_MBEDTLS_EAP_TEAP +#endif +#if !defined(CONFIG_FIPS) /* EAP-FAST keys cannot be exported in FIPS mode */ +#if defined(EAP_FAST) || defined(EAP_FAST_DYNAMIC) || defined(EAP_SERVER_FAST) +#define TLS_MBEDTLS_EAP_FAST +#endif +#endif +#endif +#endif +#endif + + +struct tls_conf { + mbedtls_ssl_config conf; + + unsigned int verify_peer:1; + unsigned int verify_depth0_only:1; + unsigned int check_crl:2; /*(needs :2 bits for 0, 1, 2)*/ + unsigned int check_crl_strict:1; /*(needs :1 bit for 0, 1)*/ + unsigned int ca_cert_probe:1; + unsigned int has_ca_cert:1; + unsigned int has_client_cert:1; + unsigned int has_private_key:1; + unsigned int suiteb128:1; + unsigned int suiteb192:1; + mbedtls_x509_crl *crl; + mbedtls_x509_crt ca_cert; + mbedtls_x509_crt client_cert; + mbedtls_pk_context private_key; + + uint32_t refcnt; + + unsigned int flags; + char *subject_match; + char *altsubject_match; + char *suffix_match; + char *domain_match; + char *check_cert_subject; + u8 ca_cert_hash[SHA256_DIGEST_LENGTH]; + + int *ciphersuites; /* list of ciphersuite ids for mbedtls_ssl_config */ +#if MBEDTLS_VERSION_NUMBER < 0x03010000 /* mbedtls 3.1.0 */ + mbedtls_ecp_group_id *curves; +#else + uint16_t *curves; /* list of curve ids for mbedtls_ssl_config */ +#endif +}; + + +struct tls_global { + struct tls_conf *tls_conf; + char *ocsp_stapling_response; + mbedtls_ctr_drbg_context *ctr_drbg; /*(see crypto_mbedtls.c)*/ + #ifdef MBEDTLS_SSL_SESSION_TICKETS + mbedtls_ssl_ticket_context ticket_ctx; + #endif + char *ca_cert_file; + struct os_reltime crl_reload_previous; + unsigned int crl_reload_interval; + uint32_t refcnt; + struct tls_config init_conf; +}; + +static struct tls_global tls_ctx_global; + + +struct tls_connection { + struct tls_conf *tls_conf; + struct wpabuf *push_buf; + struct wpabuf *pull_buf; + size_t pull_buf_offset; + + unsigned int established:1; + unsigned int resumed:1; + unsigned int verify_peer:1; + unsigned int is_server:1; + + mbedtls_ssl_context ssl; + + mbedtls_tls_prf_types tls_prf_type; + size_t expkey_keyblock_size; + size_t expkey_secret_len; + #if MBEDTLS_VERSION_NUMBER < 0x03000000 /* mbedtls 3.0.0 */ + unsigned char expkey_secret[MBEDTLS_EXPKEY_FIXED_SECRET_LEN]; + #else + unsigned char expkey_secret[MBEDTLS_MD_MAX_SIZE]; + #endif + unsigned char expkey_randbytes[MBEDTLS_EXPKEY_RAND_LEN*2]; + + int read_alerts, write_alerts, failed; + + #ifdef TLS_MBEDTLS_SESSION_TICKETS + tls_session_ticket_cb session_ticket_cb; + void *session_ticket_cb_ctx; + unsigned char *clienthello_session_ticket; + size_t clienthello_session_ticket_len; + #endif + char *peer_subject; /* peer subject info for authenticated peer */ + struct wpabuf *success_data; +}; + + +#ifndef __has_attribute +#define __has_attribute(x) 0 +#endif + +#ifndef __GNUC_PREREQ +#define __GNUC_PREREQ(maj,min) 0 +#endif + +#ifndef __attribute_cold__ +#if __has_attribute(cold) \ + || __GNUC_PREREQ(4,3) +#define __attribute_cold__ __attribute__((__cold__)) +#else +#define __attribute_cold__ +#endif +#endif + +#ifndef __attribute_noinline__ +#if __has_attribute(noinline) \ + || __GNUC_PREREQ(3,1) +#define __attribute_noinline__ __attribute__((__noinline__)) +#else +#define __attribute_noinline__ +#endif +#endif + + +__attribute_cold__ +__attribute_noinline__ +static void emsg(int level, const char * const msg) +{ + wpa_printf(level, "MTLS: %s", msg); +} + + +__attribute_cold__ +__attribute_noinline__ +static void emsgrc(int level, const char * const msg, int rc) +{ + #ifdef MBEDTLS_ERROR_C + /* error logging convenience function that decodes mbedtls result codes */ + char buf[256]; + mbedtls_strerror(rc, buf, sizeof(buf)); + wpa_printf(level, "MTLS: %s: %s (-0x%04x)", msg, buf, -rc); + #else + wpa_printf(level, "MTLS: %s: (-0x%04x)", msg, -rc); + #endif +} + + +#define elog(rc, msg) emsgrc(MSG_ERROR, (msg), (rc)) +#define ilog(rc, msg) emsgrc(MSG_INFO, (msg), (rc)) + + +struct tls_conf * tls_conf_init(void *tls_ctx) +{ + struct tls_conf *tls_conf = os_zalloc(sizeof(*tls_conf)); + if (tls_conf == NULL) + return NULL; + tls_conf->refcnt = 1; + + mbedtls_ssl_config_init(&tls_conf->conf); + mbedtls_ssl_conf_rng(&tls_conf->conf, + mbedtls_ctr_drbg_random, tls_ctx_global.ctr_drbg); + mbedtls_x509_crt_init(&tls_conf->ca_cert); + mbedtls_x509_crt_init(&tls_conf->client_cert); + mbedtls_pk_init(&tls_conf->private_key); + + return tls_conf; +} + + +void tls_conf_deinit(struct tls_conf *tls_conf) +{ + if (tls_conf == NULL || --tls_conf->refcnt != 0) + return; + + mbedtls_x509_crt_free(&tls_conf->ca_cert); + mbedtls_x509_crt_free(&tls_conf->client_cert); + if (tls_conf->crl) { + mbedtls_x509_crl_free(tls_conf->crl); + os_free(tls_conf->crl); + } + mbedtls_pk_free(&tls_conf->private_key); + mbedtls_ssl_config_free(&tls_conf->conf); + os_free(tls_conf->curves); + os_free(tls_conf->ciphersuites); + os_free(tls_conf->subject_match); + os_free(tls_conf->altsubject_match); + os_free(tls_conf->suffix_match); + os_free(tls_conf->domain_match); + os_free(tls_conf->check_cert_subject); + os_free(tls_conf); +} + + +mbedtls_ctr_drbg_context * crypto_mbedtls_ctr_drbg(void); /*(not in header)*/ + +__attribute_cold__ +void * tls_init(const struct tls_config *conf) +{ + /* RFE: review struct tls_config *conf (different from tls_conf) */ + + if (++tls_ctx_global.refcnt > 1) + return &tls_ctx_global; + + tls_ctx_global.ctr_drbg = crypto_mbedtls_ctr_drbg(); + #ifdef MBEDTLS_SSL_SESSION_TICKETS + mbedtls_ssl_ticket_init(&tls_ctx_global.ticket_ctx); + mbedtls_ssl_ticket_setup(&tls_ctx_global.ticket_ctx, + mbedtls_ctr_drbg_random, + tls_ctx_global.ctr_drbg, + MBEDTLS_CIPHER_AES_256_GCM, + 43200); /* ticket timeout: 12 hours */ + #endif + /* copy struct for future use */ + tls_ctx_global.init_conf = *conf; + if (conf->openssl_ciphers) + tls_ctx_global.init_conf.openssl_ciphers = + os_strdup(conf->openssl_ciphers); + + tls_ctx_global.crl_reload_interval = conf->crl_reload_interval; + os_get_reltime(&tls_ctx_global.crl_reload_previous); + + return &tls_ctx_global; +} + + +__attribute_cold__ +void tls_deinit(void *tls_ctx) +{ + if (tls_ctx == NULL || --tls_ctx_global.refcnt != 0) + return; + + tls_conf_deinit(tls_ctx_global.tls_conf); + os_free(tls_ctx_global.ca_cert_file); + os_free(tls_ctx_global.ocsp_stapling_response); + char *openssl_ciphers; /*(allocated in tls_init())*/ + *(const char **)&openssl_ciphers = + tls_ctx_global.init_conf.openssl_ciphers; + os_free(openssl_ciphers); + #ifdef MBEDTLS_SSL_SESSION_TICKETS + mbedtls_ssl_ticket_free(&tls_ctx_global.ticket_ctx); + #endif + os_memset(&tls_ctx_global, 0, sizeof(tls_ctx_global)); +} + + +int tls_get_errors(void *tls_ctx) +{ + return 0; +} + + +static void tls_connection_deinit_expkey(struct tls_connection *conn) +{ + conn->tls_prf_type = 0; /* MBEDTLS_SSL_TLS_PRF_NONE; */ + conn->expkey_keyblock_size = 0; + conn->expkey_secret_len = 0; + forced_memzero(conn->expkey_secret, sizeof(conn->expkey_secret)); + forced_memzero(conn->expkey_randbytes, sizeof(conn->expkey_randbytes)); +} + + +#ifdef TLS_MBEDTLS_SESSION_TICKETS +void tls_connection_deinit_clienthello_session_ticket(struct tls_connection *conn) +{ + if (conn->clienthello_session_ticket) { + mbedtls_platform_zeroize(conn->clienthello_session_ticket, + conn->clienthello_session_ticket_len); + mbedtls_free(conn->clienthello_session_ticket); + conn->clienthello_session_ticket = NULL; + conn->clienthello_session_ticket_len = 0; + } +} +#endif + + +void tls_connection_deinit(void *tls_ctx, struct tls_connection *conn) +{ + if (conn == NULL) + return; + + #if 0 /*(good intention, but never sent since we destroy self below)*/ + if (conn->established) + mbedtls_ssl_close_notify(&conn->ssl); + #endif + + if (conn->tls_prf_type) + tls_connection_deinit_expkey(conn); + + #ifdef TLS_MBEDTLS_SESSION_TICKETS + if (conn->clienthello_session_ticket) + tls_connection_deinit_clienthello_session_ticket(conn); + #endif + + os_free(conn->peer_subject); + wpabuf_free(conn->success_data); + wpabuf_free(conn->push_buf); + wpabuf_free(conn->pull_buf); + mbedtls_ssl_free(&conn->ssl); + tls_conf_deinit(conn->tls_conf); + os_free(conn); +} + + +static void tls_mbedtls_refresh_crl(void); +static int tls_mbedtls_ssl_setup(struct tls_connection *conn); + +struct tls_connection * tls_connection_init(void *tls_ctx) +{ + struct tls_connection *conn = os_zalloc(sizeof(*conn)); + if (conn == NULL) + return NULL; + + mbedtls_ssl_init(&conn->ssl); + + conn->tls_conf = tls_ctx_global.tls_conf; /*(inherit global conf, if set)*/ + if (conn->tls_conf) { + ++conn->tls_conf->refcnt; + /* check for CRL refresh if inheriting from global config */ + tls_mbedtls_refresh_crl(); + + conn->verify_peer = conn->tls_conf->verify_peer; + if (tls_mbedtls_ssl_setup(conn) != 0) { + tls_connection_deinit(&tls_ctx_global, conn); + return NULL; + } + } + + return conn; +} + + +int tls_connection_established(void *tls_ctx, struct tls_connection *conn) +{ + return conn ? conn->established : 0; +} + + +__attribute_noinline__ +char * tls_mbedtls_peer_serial_num(const mbedtls_x509_crt *crt, char *serial_num, size_t len) +{ + /* mbedtls_x509_serial_gets() inefficiently formats to hex separated by + * colons, so generate the hex serial number here. The func + * wpa_snprintf_hex_uppercase() is similarly inefficient. */ + size_t i = 0; /* skip leading 0's per Distinguished Encoding Rules (DER) */ + while (i < crt->serial.len && crt->serial.p[i] == 0) ++i; + if (i == crt->serial.len) --i; + + const unsigned char *s = crt->serial.p + i; + const size_t e = (crt->serial.len - i) * 2; + if (e >= len) + return NULL; + #if 0 + wpa_snprintf_hex_uppercase(serial_num, len, s, crt->serial.len-i); + #else + for (i = 0; i < e; i+=2, ++s) { + serial_num[i+0] = "0123456789ABCDEF"[(*s >> 4)]; + serial_num[i+1] = "0123456789ABCDEF"[(*s & 0xF)]; + } + serial_num[e] = '\0'; + #endif + return serial_num; +} + + +char * tls_connection_peer_serial_num(void *tls_ctx, + struct tls_connection *conn) +{ + const mbedtls_x509_crt *crt = mbedtls_ssl_get_peer_cert(&conn->ssl); + if (crt == NULL) + return NULL; + size_t len = crt->serial.len * 2 + 1; + char *serial_num = os_malloc(len); + if (!serial_num) + return NULL; + return tls_mbedtls_peer_serial_num(crt, serial_num, len); +} + + +static void tls_pull_buf_reset(struct tls_connection *conn); + +int tls_connection_shutdown(void *tls_ctx, struct tls_connection *conn) +{ + /* Note: this function called from eap_peer_tls_reauth_init() + * for session resumption, not for connection shutdown */ + + if (conn == NULL) + return -1; + + tls_pull_buf_reset(conn); + wpabuf_free(conn->push_buf); + conn->push_buf = NULL; + conn->established = 0; + conn->resumed = 0; + if (conn->tls_prf_type) + tls_connection_deinit_expkey(conn); + + /* RFE: prepare for session resumption? (see doc in crypto/tls.h) */ + + return mbedtls_ssl_session_reset(&conn->ssl); +} + + +static int tls_wpabuf_resize_put_data(struct wpabuf **buf, + const unsigned char *data, size_t dlen) +{ + if (wpabuf_resize(buf, dlen) < 0) + return 0; + wpabuf_put_data(*buf, data, dlen); + return 1; +} + + +static int tls_pull_buf_append(struct tls_connection *conn, + const struct wpabuf *in_data) +{ + /*(interface does not lend itself to move semantics)*/ + return tls_wpabuf_resize_put_data(&conn->pull_buf, + wpabuf_head(in_data), + wpabuf_len(in_data)); +} + + +static void tls_pull_buf_reset(struct tls_connection *conn) +{ + /*(future: might consider reusing conn->pull_buf)*/ + wpabuf_free(conn->pull_buf); + conn->pull_buf = NULL; + conn->pull_buf_offset = 0; +} + + +__attribute_cold__ +static void tls_pull_buf_discard(struct tls_connection *conn, const char *func) +{ + size_t discard = wpabuf_len(conn->pull_buf) - conn->pull_buf_offset; + if (discard) + wpa_printf(MSG_DEBUG, + "%s - %zu bytes remaining in pull_buf; discarding", + func, discard); + tls_pull_buf_reset(conn); +} + + +static int tls_pull_func(void *ptr, unsigned char *buf, size_t len) +{ + struct tls_connection *conn = (struct tls_connection *) ptr; + if (conn->pull_buf == NULL) + return MBEDTLS_ERR_SSL_WANT_READ; + const size_t dlen = wpabuf_len(conn->pull_buf) - conn->pull_buf_offset; + if (dlen == 0) + return MBEDTLS_ERR_SSL_WANT_READ; + + if (len > dlen) + len = dlen; + os_memcpy(buf, wpabuf_head(conn->pull_buf)+conn->pull_buf_offset, len); + + if (len == dlen) { + tls_pull_buf_reset(conn); + /*wpa_printf(MSG_DEBUG, "%s - emptied pull_buf", __func__);*/ + } + else { + conn->pull_buf_offset += len; + /*wpa_printf(MSG_DEBUG, "%s - %zu bytes remaining in pull_buf", + __func__, dlen - len);*/ + } + return (int)len; +} + + +static int tls_push_func(void *ptr, const unsigned char *buf, size_t len) +{ + struct tls_connection *conn = (struct tls_connection *) ptr; + return tls_wpabuf_resize_put_data(&conn->push_buf, buf, len) + ? (int)len + : MBEDTLS_ERR_SSL_ALLOC_FAILED; +} + + +static int +tls_mbedtls_verify_cb (void *arg, mbedtls_x509_crt *crt, int depth, uint32_t *flags); + + +static int tls_mbedtls_ssl_setup(struct tls_connection *conn) +{ + #if 0 + /* mbedtls_ssl_setup() must be called only once */ + /* If this func might be called multiple times (e.g. via set_params), + * then we should set a flag in conn that ssl was initialized */ + if (conn->ssl_is_init) { + mbedtls_ssl_free(&conn->ssl); + mbedtls_ssl_init(&conn->ssl); + } + #endif + + int ret = mbedtls_ssl_setup(&conn->ssl, &conn->tls_conf->conf); + if (ret != 0) { + elog(ret, "mbedtls_ssl_setup"); + return -1; + } + + mbedtls_ssl_set_bio(&conn->ssl, conn, tls_push_func, tls_pull_func, NULL); + #if MBEDTLS_VERSION_NUMBER >= 0x03000000 /* mbedtls 3.0.0 */ + mbedtls_ssl_set_export_keys_cb( + &conn->ssl, tls_connection_export_keys_cb, conn); + #elif MBEDTLS_VERSION_NUMBER >= 0x02120000 /* mbedtls 2.18.0 */ + mbedtls_ssl_conf_export_keys_ext_cb( + &conn->tls_conf->conf, tls_connection_export_keys_cb, conn); + #endif + if (conn->verify_peer) + mbedtls_ssl_set_verify(&conn->ssl, tls_mbedtls_verify_cb, conn); + + return 0; +} + + +static int tls_mbedtls_data_is_pem(const u8 *data) +{ + return (NULL != os_strstr((char *)data, "-----")); +} + + +static void tls_mbedtls_set_allowed_tls_vers(struct tls_conf *tls_conf, + mbedtls_ssl_config *conf) +{ + #if !defined(MBEDTLS_SSL_PROTO_TLS1_3) + tls_conf->flags |= TLS_CONN_DISABLE_TLSv1_3; + #endif + + /* unconditionally require TLSv1.2+ for TLS_CONN_SUITEB */ + if (tls_conf->flags & TLS_CONN_SUITEB) { + tls_conf->flags |= TLS_CONN_DISABLE_TLSv1_0; + tls_conf->flags |= TLS_CONN_DISABLE_TLSv1_1; + } + + const unsigned int flags = tls_conf->flags; + + /* attempt to map flags to min and max TLS protocol version */ + + int min = (flags & TLS_CONN_DISABLE_TLSv1_0) + ? (flags & TLS_CONN_DISABLE_TLSv1_1) + ? (flags & TLS_CONN_DISABLE_TLSv1_2) + ? (flags & TLS_CONN_DISABLE_TLSv1_3) + ? 4 + : 3 + : 2 + : 1 + : 0; + + int max = (flags & TLS_CONN_DISABLE_TLSv1_3) + ? (flags & TLS_CONN_DISABLE_TLSv1_2) + ? (flags & TLS_CONN_DISABLE_TLSv1_1) + ? (flags & TLS_CONN_DISABLE_TLSv1_0) + ? -1 + : 0 + : 1 + : 2 + : 3; + + if ((flags & TLS_CONN_ENABLE_TLSv1_2) && min > 2) min = 2; + if ((flags & TLS_CONN_ENABLE_TLSv1_1) && min > 1) min = 1; + if ((flags & TLS_CONN_ENABLE_TLSv1_0) && min > 0) min = 0; + if (max < min) { + emsg(MSG_ERROR, "invalid tls_disable_tlsv* params; ignoring"); + return; + } + #if MBEDTLS_VERSION_NUMBER >= 0x03000000 /* mbedtls 3.0.0 */ + /* mbed TLS 3.0.0 removes support for protocols < TLSv1.2 */ + if (min < 2 || max < 2) { + emsg(MSG_ERROR, "invalid tls_disable_tlsv* params; ignoring"); + if (min < 2) min = 2; + if (max < 2) max = 2; + } + #endif + + #if MBEDTLS_VERSION_NUMBER >= 0x03020000 /* mbedtls 3.2.0 */ + /* MBEDTLS_SSL_VERSION_TLS1_2 = 0x0303 *//*!< (D)TLS 1.2 */ + /* MBEDTLS_SSL_VERSION_TLS1_3 = 0x0304 *//*!< (D)TLS 1.3 */ + min = (min == 2) ? MBEDTLS_SSL_VERSION_TLS1_2 : MBEDTLS_SSL_VERSION_TLS1_3; + max = (max == 2) ? MBEDTLS_SSL_VERSION_TLS1_2 : MBEDTLS_SSL_VERSION_TLS1_3; + mbedtls_ssl_conf_min_tls_version(conf, min); + mbedtls_ssl_conf_max_tls_version(conf, max); + #else + #ifndef MBEDTLS_SSL_MINOR_VERSION_4 + if (min == 3) min = 2; + if (max == 3) max = 2; + #endif + /* MBEDTLS_SSL_MINOR_VERSION_0 0 *//*!< SSL v3.0 */ + /* MBEDTLS_SSL_MINOR_VERSION_1 1 *//*!< TLS v1.0 */ + /* MBEDTLS_SSL_MINOR_VERSION_2 2 *//*!< TLS v1.1 */ + /* MBEDTLS_SSL_MINOR_VERSION_3 3 *//*!< TLS v1.2 */ + /* MBEDTLS_SSL_MINOR_VERSION_4 4 *//*!< TLS v1.3 */ + mbedtls_ssl_conf_min_version(conf, MBEDTLS_SSL_MAJOR_VERSION_3, min+1); + mbedtls_ssl_conf_max_version(conf, MBEDTLS_SSL_MAJOR_VERSION_3, max+1); + #endif +} + + +__attribute_noinline__ +static int tls_mbedtls_readfile(const char *path, u8 **buf, size_t *n); + + +static int +tls_mbedtls_set_dhparams(struct tls_conf *tls_conf, const char *dh_file) +{ + size_t len; + u8 *data; + if (tls_mbedtls_readfile(dh_file, &data, &len)) + return 0; + + /* parse only if DH parameters if in PEM format */ + if (tls_mbedtls_data_is_pem(data) + && NULL == os_strstr((char *)data, "-----BEGIN DH PARAMETERS-----")) { + if (os_strstr((char *)data, "-----BEGIN DSA PARAMETERS-----")) + wpa_printf(MSG_WARNING, "DSA parameters not handled (%s)", dh_file); + else + wpa_printf(MSG_WARNING, "unexpected DH param content (%s)",dh_file); + forced_memzero(data, len); + os_free(data); + return 0; + } + + /* mbedtls_dhm_parse_dhm() expects "-----BEGIN DH PARAMETERS-----" if PEM */ + mbedtls_dhm_context dhm; + mbedtls_dhm_init(&dhm); + int rc = mbedtls_dhm_parse_dhm(&dhm, data, len); + if (0 == rc) + rc = mbedtls_ssl_conf_dh_param_ctx(&tls_conf->conf, &dhm); + if (0 != rc) + elog(rc, dh_file); + mbedtls_dhm_free(&dhm); + + forced_memzero(data, len); + os_free(data); + return (0 == rc); +} + + +/* reference: lighttpd src/mod_mbedtls.c:mod_mbedtls_ssl_append_curve() + * (same author: gstrauss@gluelogic.com; same license: BSD-3-Clause) */ +#if MBEDTLS_VERSION_NUMBER < 0x03010000 /* mbedtls 3.1.0 */ +static int +tls_mbedtls_append_curve (mbedtls_ecp_group_id *ids, int nids, int idsz, const mbedtls_ecp_group_id id) +{ + if (1 >= idsz - (nids + 1)) { + emsg(MSG_ERROR, "error: too many curves during list expand"); + return -1; + } + ids[++nids] = id; + return nids; +} + + +static int +tls_mbedtls_set_curves(struct tls_conf *tls_conf, const char *curvelist) +{ + mbedtls_ecp_group_id ids[512]; + int nids = -1; + const int idsz = (int)(sizeof(ids)/sizeof(*ids)-1); + const mbedtls_ecp_curve_info * const curve_info = mbedtls_ecp_curve_list(); + + for (const char *e = curvelist-1; e; ) { + const char * const n = e+1; + e = os_strchr(n, ':'); + size_t len = e ? (size_t)(e - n) : os_strlen(n); + mbedtls_ecp_group_id grp_id = MBEDTLS_ECP_DP_NONE; + switch (len) { + case 5: + if (0 == os_memcmp("P-521", n, 5)) + grp_id = MBEDTLS_ECP_DP_SECP521R1; + else if (0 == os_memcmp("P-384", n, 5)) + grp_id = MBEDTLS_ECP_DP_SECP384R1; + else if (0 == os_memcmp("P-256", n, 5)) + grp_id = MBEDTLS_ECP_DP_SECP256R1; + break; + case 6: + if (0 == os_memcmp("BP-521", n, 6)) + grp_id = MBEDTLS_ECP_DP_BP512R1; + else if (0 == os_memcmp("BP-384", n, 6)) + grp_id = MBEDTLS_ECP_DP_BP384R1; + else if (0 == os_memcmp("BP-256", n, 6)) + grp_id = MBEDTLS_ECP_DP_BP256R1; + break; + default: + break; + } + if (grp_id != MBEDTLS_ECP_DP_NONE) { + nids = tls_mbedtls_append_curve(ids, nids, idsz, grp_id); + if (-1 == nids) return 0; + continue; + } + /* similar to mbedtls_ecp_curve_info_from_name() */ + const mbedtls_ecp_curve_info *info; + for (info = curve_info; info->grp_id != MBEDTLS_ECP_DP_NONE; ++info) { + if (0 == os_strncmp(info->name, n, len) && info->name[len] == '\0') + break; + } + if (info->grp_id == MBEDTLS_ECP_DP_NONE) { + wpa_printf(MSG_ERROR, "MTLS: unrecognized curve: %.*s",(int)len,n); + return 0; + } + + nids = tls_mbedtls_append_curve(ids, nids, idsz, info->grp_id); + if (-1 == nids) return 0; + } + + /* mod_openssl configures "prime256v1" if curve list not specified, + * but mbedtls provides a list of supported curves if not explicitly set */ + if (-1 == nids) return 1; /* empty list; no-op */ + + ids[++nids] = MBEDTLS_ECP_DP_NONE; /* terminate list */ + ++nids; + + /* curves list must be persistent for lifetime of mbedtls_ssl_config */ + tls_conf->curves = os_malloc(nids * sizeof(mbedtls_ecp_group_id)); + if (tls_conf->curves == NULL) + return 0; + os_memcpy(tls_conf->curves, ids, nids * sizeof(mbedtls_ecp_group_id)); + + mbedtls_ssl_conf_curves(&tls_conf->conf, tls_conf->curves); + return 1; +} +#else +static int +tls_mbedtls_append_curve (uint16_t *ids, int nids, int idsz, const uint16_t id) +{ + if (1 >= idsz - (nids + 1)) { + emsg(MSG_ERROR, "error: too many curves during list expand"); + return -1; + } + ids[++nids] = id; + return nids; +} + + +static int +tls_mbedtls_set_curves(struct tls_conf *tls_conf, const char *curvelist) +{ + /* TLS Supported Groups (renamed from "EC Named Curve Registry") + * https://www.iana.org/assignments/tls-parameters/tls-parameters.xhtml#tls-parameters-8 + */ + uint16_t ids[512]; + int nids = -1; + const int idsz = (int)(sizeof(ids)/sizeof(*ids)-1); + const mbedtls_ecp_curve_info * const curve_info = mbedtls_ecp_curve_list(); + + for (const char *e = curvelist-1; e; ) { + const char * const n = e+1; + e = os_strchr(n, ':'); + size_t len = e ? (size_t)(e - n) : os_strlen(n); + uint16_t tls_id = 0; + switch (len) { + case 5: + if (0 == os_memcmp("P-521", n, 5)) + tls_id = 25; /* mbedtls_ecp_group_id MBEDTLS_ECP_DP_SECP521R1 */ + else if (0 == os_memcmp("P-384", n, 5)) + tls_id = 24; /* mbedtls_ecp_group_id MBEDTLS_ECP_DP_SECP384R1 */ + else if (0 == os_memcmp("P-256", n, 5)) + tls_id = 23; /* mbedtls_ecp_group_id MBEDTLS_ECP_DP_SECP256R1 */ + break; + case 6: + if (0 == os_memcmp("BP-521", n, 6)) + tls_id = 28; /* mbedtls_ecp_group_id MBEDTLS_ECP_DP_BP512R1 */ + else if (0 == os_memcmp("BP-384", n, 6)) + tls_id = 27; /* mbedtls_ecp_group_id MBEDTLS_ECP_DP_BP384R1 */ + else if (0 == os_memcmp("BP-256", n, 6)) + tls_id = 26; /* mbedtls_ecp_group_id MBEDTLS_ECP_DP_BP256R1 */ + break; + default: + break; + } + if (tls_id != 0) { + nids = tls_mbedtls_append_curve(ids, nids, idsz, tls_id); + if (-1 == nids) return 0; + continue; + } + /* similar to mbedtls_ecp_curve_info_from_name() */ + const mbedtls_ecp_curve_info *info; + for (info = curve_info; info->tls_id != 0; ++info) { + if (0 == os_strncmp(info->name, n, len) && info->name[len] == '\0') + break; + } + if (info->tls_id == 0) { + wpa_printf(MSG_ERROR, "MTLS: unrecognized curve: %.*s",(int)len,n); + return 0; + } + + nids = tls_mbedtls_append_curve(ids, nids, idsz, info->tls_id); + if (-1 == nids) return 0; + } + + /* mod_openssl configures "prime256v1" if curve list not specified, + * but mbedtls provides a list of supported curves if not explicitly set */ + if (-1 == nids) return 1; /* empty list; no-op */ + + ids[++nids] = 0; /* terminate list */ + ++nids; + + /* curves list must be persistent for lifetime of mbedtls_ssl_config */ + tls_conf->curves = os_malloc(nids * sizeof(uint16_t)); + if (tls_conf->curves == NULL) + return 0; + os_memcpy(tls_conf->curves, ids, nids * sizeof(uint16_t)); + + mbedtls_ssl_conf_groups(&tls_conf->conf, tls_conf->curves); + return 1; +} +#endif /* MBEDTLS_VERSION_NUMBER >= 0x03010000 */ /* mbedtls 3.1.0 */ + + +/* data copied from lighttpd src/mod_mbedtls.c (BSD-3-Clause) */ +static const int suite_AES_256_ephemeral[] = { + /* All AES-256 ephemeral suites */ + MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, + MBEDTLS_TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, + MBEDTLS_TLS_DHE_RSA_WITH_AES_256_GCM_SHA384, + MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_256_CCM, + MBEDTLS_TLS_DHE_RSA_WITH_AES_256_CCM, + MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384, + MBEDTLS_TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384, + MBEDTLS_TLS_DHE_RSA_WITH_AES_256_CBC_SHA256, + MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA, + MBEDTLS_TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, + MBEDTLS_TLS_DHE_RSA_WITH_AES_256_CBC_SHA, + MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_256_CCM_8, + MBEDTLS_TLS_DHE_RSA_WITH_AES_256_CCM_8 +}; + +/* data copied from lighttpd src/mod_mbedtls.c (BSD-3-Clause) */ +static const int suite_AES_128_ephemeral[] = { + /* All AES-128 ephemeral suites */ + MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, + MBEDTLS_TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + MBEDTLS_TLS_DHE_RSA_WITH_AES_128_GCM_SHA256, + MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_128_CCM, + MBEDTLS_TLS_DHE_RSA_WITH_AES_128_CCM, + MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256, + MBEDTLS_TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256, + MBEDTLS_TLS_DHE_RSA_WITH_AES_128_CBC_SHA256, + MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA, + MBEDTLS_TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, + MBEDTLS_TLS_DHE_RSA_WITH_AES_128_CBC_SHA, + MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_128_CCM_8, + MBEDTLS_TLS_DHE_RSA_WITH_AES_128_CCM_8 +}; + +/* data copied from lighttpd src/mod_mbedtls.c (BSD-3-Clause) */ +/* HIGH cipher list (mapped from openssl list to mbedtls) */ +static const int suite_HIGH[] = { + MBEDTLS_TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256, + MBEDTLS_TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256, + MBEDTLS_TLS_DHE_RSA_WITH_CHACHA20_POLY1305_SHA256, + MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, + MBEDTLS_TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, + MBEDTLS_TLS_DHE_RSA_WITH_AES_256_GCM_SHA384, + MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_256_CCM, + MBEDTLS_TLS_DHE_RSA_WITH_AES_256_CCM, + MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384, + MBEDTLS_TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384, + MBEDTLS_TLS_DHE_RSA_WITH_AES_256_CBC_SHA256, + MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA, + MBEDTLS_TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, + MBEDTLS_TLS_DHE_RSA_WITH_AES_256_CBC_SHA, + MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_256_CCM_8, + MBEDTLS_TLS_DHE_RSA_WITH_AES_256_CCM_8, + MBEDTLS_TLS_ECDHE_ECDSA_WITH_CAMELLIA_256_CBC_SHA384, + MBEDTLS_TLS_ECDHE_RSA_WITH_CAMELLIA_256_CBC_SHA384, + MBEDTLS_TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA256, + MBEDTLS_TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA, + MBEDTLS_TLS_ECDHE_ECDSA_WITH_ARIA_256_GCM_SHA384, + MBEDTLS_TLS_ECDHE_RSA_WITH_ARIA_256_GCM_SHA384, + MBEDTLS_TLS_DHE_RSA_WITH_ARIA_256_GCM_SHA384, + MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, + MBEDTLS_TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + MBEDTLS_TLS_DHE_RSA_WITH_AES_128_GCM_SHA256, + MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_128_CCM, + MBEDTLS_TLS_DHE_RSA_WITH_AES_128_CCM, + MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256, + MBEDTLS_TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256, + MBEDTLS_TLS_DHE_RSA_WITH_AES_128_CBC_SHA256, + MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA, + MBEDTLS_TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, + MBEDTLS_TLS_DHE_RSA_WITH_AES_128_CBC_SHA, + MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_128_CCM_8, + MBEDTLS_TLS_DHE_RSA_WITH_AES_128_CCM_8, + MBEDTLS_TLS_ECDHE_ECDSA_WITH_CAMELLIA_128_CBC_SHA256, + MBEDTLS_TLS_ECDHE_RSA_WITH_CAMELLIA_128_CBC_SHA256, + MBEDTLS_TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA256, + MBEDTLS_TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA, + MBEDTLS_TLS_ECDHE_ECDSA_WITH_ARIA_128_GCM_SHA256, + MBEDTLS_TLS_ECDHE_RSA_WITH_ARIA_128_GCM_SHA256, + MBEDTLS_TLS_DHE_RSA_WITH_ARIA_128_GCM_SHA256, + MBEDTLS_TLS_ECDHE_PSK_WITH_CHACHA20_POLY1305_SHA256, + MBEDTLS_TLS_DHE_PSK_WITH_CHACHA20_POLY1305_SHA256, + MBEDTLS_TLS_DHE_PSK_WITH_AES_256_GCM_SHA384, + MBEDTLS_TLS_DHE_PSK_WITH_AES_256_CCM, + MBEDTLS_TLS_ECDHE_PSK_WITH_AES_256_CBC_SHA384, + MBEDTLS_TLS_DHE_PSK_WITH_AES_256_CBC_SHA384, + MBEDTLS_TLS_ECDHE_PSK_WITH_AES_256_CBC_SHA, + MBEDTLS_TLS_DHE_PSK_WITH_AES_256_CBC_SHA, + MBEDTLS_TLS_ECDHE_PSK_WITH_CAMELLIA_256_CBC_SHA384, + MBEDTLS_TLS_DHE_PSK_WITH_CAMELLIA_256_CBC_SHA384, + MBEDTLS_TLS_DHE_PSK_WITH_AES_256_CCM_8, + MBEDTLS_TLS_DHE_PSK_WITH_ARIA_256_GCM_SHA384, + MBEDTLS_TLS_DHE_PSK_WITH_AES_128_GCM_SHA256, + MBEDTLS_TLS_DHE_PSK_WITH_AES_128_CCM, + MBEDTLS_TLS_ECDHE_PSK_WITH_AES_128_CBC_SHA256, + MBEDTLS_TLS_DHE_PSK_WITH_AES_128_CBC_SHA256, + MBEDTLS_TLS_ECDHE_PSK_WITH_AES_128_CBC_SHA, + MBEDTLS_TLS_DHE_PSK_WITH_AES_128_CBC_SHA, + MBEDTLS_TLS_DHE_PSK_WITH_CAMELLIA_128_CBC_SHA256, + MBEDTLS_TLS_ECDHE_PSK_WITH_CAMELLIA_128_CBC_SHA256, + MBEDTLS_TLS_DHE_PSK_WITH_AES_128_CCM_8, + MBEDTLS_TLS_DHE_PSK_WITH_ARIA_128_GCM_SHA256, + MBEDTLS_TLS_RSA_WITH_AES_256_GCM_SHA384, + MBEDTLS_TLS_RSA_WITH_AES_256_CCM, + MBEDTLS_TLS_RSA_WITH_AES_256_CBC_SHA256, + MBEDTLS_TLS_RSA_WITH_AES_256_CBC_SHA, + MBEDTLS_TLS_RSA_WITH_AES_256_CCM_8, + MBEDTLS_TLS_RSA_WITH_CAMELLIA_256_CBC_SHA256, + MBEDTLS_TLS_RSA_WITH_CAMELLIA_256_CBC_SHA, + MBEDTLS_TLS_RSA_WITH_ARIA_256_GCM_SHA384, + MBEDTLS_TLS_RSA_WITH_AES_128_GCM_SHA256, + MBEDTLS_TLS_RSA_WITH_AES_128_CCM, + MBEDTLS_TLS_RSA_WITH_AES_128_CBC_SHA256, + MBEDTLS_TLS_RSA_WITH_AES_128_CBC_SHA, + MBEDTLS_TLS_RSA_WITH_AES_128_CCM_8, + MBEDTLS_TLS_RSA_WITH_CAMELLIA_128_CBC_SHA256, + MBEDTLS_TLS_RSA_WITH_CAMELLIA_128_CBC_SHA, + MBEDTLS_TLS_RSA_WITH_ARIA_128_GCM_SHA256, + MBEDTLS_TLS_RSA_PSK_WITH_CHACHA20_POLY1305_SHA256, + MBEDTLS_TLS_RSA_PSK_WITH_AES_256_GCM_SHA384, + MBEDTLS_TLS_RSA_PSK_WITH_AES_256_CBC_SHA384, + MBEDTLS_TLS_RSA_PSK_WITH_AES_256_CBC_SHA, + MBEDTLS_TLS_RSA_PSK_WITH_CAMELLIA_256_CBC_SHA384, + MBEDTLS_TLS_RSA_PSK_WITH_ARIA_256_GCM_SHA384, + MBEDTLS_TLS_RSA_PSK_WITH_AES_128_GCM_SHA256, + MBEDTLS_TLS_RSA_PSK_WITH_AES_128_CBC_SHA256, + MBEDTLS_TLS_RSA_PSK_WITH_AES_128_CBC_SHA, + MBEDTLS_TLS_RSA_PSK_WITH_CAMELLIA_128_CBC_SHA256, + MBEDTLS_TLS_RSA_PSK_WITH_ARIA_128_GCM_SHA256, + MBEDTLS_TLS_PSK_WITH_CHACHA20_POLY1305_SHA256, + MBEDTLS_TLS_PSK_WITH_AES_256_GCM_SHA384, + MBEDTLS_TLS_PSK_WITH_AES_256_CCM, + MBEDTLS_TLS_PSK_WITH_AES_256_CBC_SHA384, + MBEDTLS_TLS_PSK_WITH_AES_256_CBC_SHA, + MBEDTLS_TLS_PSK_WITH_CAMELLIA_256_CBC_SHA384, + MBEDTLS_TLS_PSK_WITH_AES_256_CCM_8, + MBEDTLS_TLS_PSK_WITH_ARIA_256_GCM_SHA384, + MBEDTLS_TLS_PSK_WITH_AES_128_GCM_SHA256, + MBEDTLS_TLS_PSK_WITH_AES_128_CCM, + MBEDTLS_TLS_PSK_WITH_AES_128_CBC_SHA256, + MBEDTLS_TLS_PSK_WITH_AES_128_CBC_SHA, + MBEDTLS_TLS_PSK_WITH_CAMELLIA_128_CBC_SHA256, + MBEDTLS_TLS_PSK_WITH_AES_128_CCM_8, + MBEDTLS_TLS_PSK_WITH_ARIA_128_GCM_SHA256 +}; + + +__attribute_noinline__ +static int +tls_mbedtls_append_ciphersuite (int *ids, int nids, int idsz, const int *x, int xsz) +{ + if (xsz >= idsz - (nids + 1)) { + emsg(MSG_ERROR, "error: too many ciphers during list expand"); + return -1; + } + + for (int i = 0; i < xsz; ++i) + ids[++nids] = x[i]; + + return nids; +} + + +static int +tls_mbedtls_translate_ciphername(int id, char *buf, size_t buflen) +{ + const mbedtls_ssl_ciphersuite_t *info = + mbedtls_ssl_ciphersuite_from_id(id); + if (info == NULL) + return 0; + const char *name = mbedtls_ssl_ciphersuite_get_name(info); + const size_t len = os_strlen(name); + if (len == 7 && 0 == os_memcmp(name, "unknown", 7)) + return 0; + if (len >= buflen) + return 0; + os_strlcpy(buf, name, buflen); + + /* attempt to translate mbedtls string to openssl string + * (some heuristics; incomplete) */ + size_t i = 0, j = 0; + if (buf[0] == 'T') { + if (os_strncmp(buf, "TLS1-3-", 7) == 0) { + buf[3] = '-'; + j = 4; /* remove "1-3" from "TLS1-3-" prefix */ + i = 7; + } + else if (os_strncmp(buf, "TLS-", 4) == 0) + i = 4; /* remove "TLS-" prefix */ + } + for (; buf[i]; ++i) { + if (buf[i] == '-') { + if (i >= 3) { + if (0 == os_memcmp(buf+i-3, "AES", 3)) + continue; /* "AES-" -> "AES" */ + } + if (i >= 4) { + if (0 == os_memcmp(buf+i-4, "WITH", 4)) { + j -= 4; /* remove "WITH-" */ + continue; + } + } + } + buf[j++] = buf[i]; + } + buf[j] = '\0'; + + return j; +} + + +__attribute_noinline__ +static int +tls_mbedtls_set_ciphersuites(struct tls_conf *tls_conf, int *ids, int nids) +{ + /* ciphersuites list must be persistent for lifetime of mbedtls_ssl_config*/ + os_free(tls_conf->ciphersuites); + tls_conf->ciphersuites = os_malloc(nids * sizeof(int)); + if (tls_conf->ciphersuites == NULL) + return 0; + os_memcpy(tls_conf->ciphersuites, ids, nids * sizeof(int)); + mbedtls_ssl_conf_ciphersuites(&tls_conf->conf, tls_conf->ciphersuites); + return 1; +} + + +static int +tls_mbedtls_set_ciphers(struct tls_conf *tls_conf, const char *ciphers) +{ + char buf[64]; + int ids[512]; + int nids = -1; + const int idsz = (int)(sizeof(ids)/sizeof(*ids)-1); + const char *next; + size_t blen, clen; + do { + next = os_strchr(ciphers, ':'); + clen = next ? (size_t)(next - ciphers) : os_strlen(ciphers); + if (!clen) + continue; + + /* special-case a select set of openssl group names for hwsim tests */ + /* (review; remove excess code if tests are not run for non-OpenSSL?) */ + if (clen == 9 && os_memcmp(ciphers, "SUITEB192", 9) == 0) { + static int ssl_preset_suiteb192_ciphersuites[] = { + MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, + 0 + }; + return tls_mbedtls_set_ciphersuites(tls_conf, + ssl_preset_suiteb192_ciphersuites, + 2); + } + if (clen == 9 && os_memcmp(ciphers, "SUITEB128", 9) == 0) { + static int ssl_preset_suiteb128_ciphersuites[] = { + MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, + 0 + }; + return tls_mbedtls_set_ciphersuites(tls_conf, + ssl_preset_suiteb128_ciphersuites, + 2); + } + if (clen == 7 && os_memcmp(ciphers, "DEFAULT", 7) == 0) + continue; + if (clen == 6 && os_memcmp(ciphers, "AES128", 6) == 0) { + nids = tls_mbedtls_append_ciphersuite(ids, nids, idsz, + suite_AES_128_ephemeral, + (int)ARRAY_SIZE(suite_AES_128_ephemeral)); + if (nids == -1) + return 0; + continue; + } + if (clen == 6 && os_memcmp(ciphers, "AES256", 6) == 0) { + nids = tls_mbedtls_append_ciphersuite(ids, nids, idsz, + suite_AES_256_ephemeral, + (int)ARRAY_SIZE(suite_AES_256_ephemeral)); + if (nids == -1) + return 0; + continue; + } + if (clen == 4 && os_memcmp(ciphers, "HIGH", 4) == 0) { + nids = tls_mbedtls_append_ciphersuite(ids, nids, idsz, suite_HIGH, + (int)ARRAY_SIZE(suite_HIGH)); + if (nids == -1) + return 0; + continue; + } + /* ignore anonymous cipher group names (?not supported by mbedtls?) */ + if (clen == 4 && os_memcmp(ciphers, "!ADH", 4) == 0) + continue; + if (clen == 6 && os_memcmp(ciphers, "-aECDH", 6) == 0) + continue; + if (clen == 7 && os_memcmp(ciphers, "-aECDSA", 7) == 0) + continue; + + /* attempt to match mbedtls cipher names + * nb: does not support openssl group names or list manipulation syntax + * (alt: could copy almost 1200 lines (!!!) of lighttpd mod_mbedtls.c + * mod_mbedtls_ssl_conf_ciphersuites() to translate strings) + * note: not efficient to rewrite list for each ciphers entry, + * but this code is expected to run only at startup + */ + const int *list = mbedtls_ssl_list_ciphersuites(); + for (; *list; ++list) { + blen = tls_mbedtls_translate_ciphername(*list,buf,sizeof(buf)); + if (!blen) + continue; + + /* matching heuristics additional to translate_ciphername above */ + if (blen == clen+4) { + char *cbc = os_strstr(buf, "CBC-"); + if (cbc) { + os_memmove(cbc, cbc+4, blen-(cbc+4-buf)+1); /*(w/ '\0')*/ + blen -= 4; + } + } + if (blen >= clen && os_memcmp(ciphers, buf, clen) == 0 + && (blen == clen + || (blen == clen+7 && os_memcmp(buf+clen, "-SHA256", 7)))) { + if (1 >= idsz - (nids + 1)) { + emsg(MSG_ERROR, + "error: too many ciphers during list expand"); + return 0; + } + ids[++nids] = *list; + break; + } + } + if (*list == 0) { + wpa_printf(MSG_ERROR, + "MTLS: unrecognized cipher: %.*s", (int)clen, ciphers); + return 0; + } + } while ((ciphers = next ? next+1 : NULL)); + + if (-1 == nids) return 1; /* empty list; no-op */ + + ids[++nids] = 0; /* terminate list */ + ++nids; + + return tls_mbedtls_set_ciphersuites(tls_conf, ids, nids); +} + + +__attribute_noinline__ +static int tls_mbedtls_set_item(char **config_item, const char *item) +{ + os_free(*config_item); + *config_item = NULL; + return item ? (*config_item = os_strdup(item)) != NULL : 1; +} + + +static int tls_connection_set_subject_match(struct tls_conf *tls_conf, + const struct tls_connection_params *params) +{ + int rc = 1; + rc &= tls_mbedtls_set_item(&tls_conf->subject_match, + params->subject_match); + rc &= tls_mbedtls_set_item(&tls_conf->altsubject_match, + params->altsubject_match); + rc &= tls_mbedtls_set_item(&tls_conf->suffix_match, + params->suffix_match); + rc &= tls_mbedtls_set_item(&tls_conf->domain_match, + params->domain_match); + rc &= tls_mbedtls_set_item(&tls_conf->check_cert_subject, + params->check_cert_subject); + return rc; +} + + +/* duplicated in crypto_mbedtls.c:crypto_mbedtls_readfile()*/ +__attribute_noinline__ +static int tls_mbedtls_readfile(const char *path, u8 **buf, size_t *n) +{ + #if 0 /* #ifdef MBEDTLS_FS_IO */ + /*(includes +1 for '\0' needed by mbedtls PEM parsing funcs)*/ + if (mbedtls_pk_load_file(path, (unsigned char **)buf, n) != 0) { + wpa_printf(MSG_ERROR, "error: mbedtls_pk_load_file %s", path); + return -1; + } + #else + /*(use os_readfile() so that we can use os_free() + *(if we use mbedtls_pk_load_file() above, macros prevent calling free() + * directly #if defined(OS_REJECT_C_LIB_FUNCTIONS) and calling os_free() + * on buf aborts in tests if buf not allocated via os_malloc())*/ + *buf = (u8 *)os_readfile(path, n); + if (!*buf) { + wpa_printf(MSG_ERROR, "error: os_readfile %s", path); + return -1; + } + u8 *buf0 = os_realloc(*buf, *n+1); + if (!buf0) { + bin_clear_free(*buf, *n); + *buf = NULL; + return -1; + } + buf0[(*n)++] = '\0'; + *buf = buf0; + #endif + return 0; +} + + +static int tls_mbedtls_set_crl(struct tls_conf *tls_conf, const u8 *data, size_t len) +{ + /* do not use mbedtls_x509_crl_parse() on PEM unless it contains CRL */ + if (len && data[len-1] == '\0' + && NULL == os_strstr((const char *)data,"-----BEGIN X509 CRL-----") + && tls_mbedtls_data_is_pem(data)) + return 0; + + mbedtls_x509_crl crl; + mbedtls_x509_crl_init(&crl); + int rc = mbedtls_x509_crl_parse(&crl, data, len); + if (rc < 0) { + mbedtls_x509_crl_free(&crl); + return rc == MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT ? 0 : rc; + } + + mbedtls_x509_crl *crl_new = os_malloc(sizeof(crl)); + if (crl_new == NULL) { + mbedtls_x509_crl_free(&crl); + return MBEDTLS_ERR_X509_ALLOC_FAILED; + } + os_memcpy(crl_new, &crl, sizeof(crl)); + + mbedtls_x509_crl *crl_old = tls_conf->crl; + tls_conf->crl = crl_new; + if (crl_old) { + mbedtls_x509_crl_free(crl_old); + os_free(crl_old); + } + return 0; +} + + +static int tls_mbedtls_set_ca(struct tls_conf *tls_conf, u8 *data, size_t len) +{ + /* load crt struct onto stack and then copy into tls_conf in + * order to preserve existing tls_conf value if error occurs + * + * hostapd is not threaded, or else should allocate memory and swap in + * pointer reduce race condition. (If threaded, would also need to + * keep reference count of use to avoid freeing while still in use.) */ + + mbedtls_x509_crt crt; + mbedtls_x509_crt_init(&crt); + int rc = mbedtls_x509_crt_parse(&crt, data, len); + if (rc < 0) { + mbedtls_x509_crt_free(&crt); + return rc; + } + + mbedtls_x509_crt_free(&tls_conf->ca_cert); + os_memcpy(&tls_conf->ca_cert, &crt, sizeof(crt)); + return 0; +} + + +static int tls_mbedtls_set_ca_and_crl(struct tls_conf *tls_conf, const char *ca_cert_file) +{ + size_t len; + u8 *data; + if (tls_mbedtls_readfile(ca_cert_file, &data, &len)) + return -1; + + int rc; + if (0 == (rc = tls_mbedtls_set_ca(tls_conf, data, len)) + && (!tls_mbedtls_data_is_pem(data) /*skip parse for CRL if not PEM*/ + || 0 == (rc = tls_mbedtls_set_crl(tls_conf, data, len)))) { + mbedtls_ssl_conf_ca_chain(&tls_conf->conf, + &tls_conf->ca_cert, + tls_conf->crl); + } + else { + elog(rc, __func__); + emsg(MSG_ERROR, ca_cert_file); + } + + forced_memzero(data, len); + os_free(data); + return rc; +} + + +static void tls_mbedtls_refresh_crl(void) +{ + /* check for CRL refresh + * continue even if error occurs; continue with previous cert, CRL */ + unsigned int crl_reload_interval = tls_ctx_global.crl_reload_interval; + const char *ca_cert_file = tls_ctx_global.ca_cert_file; + if (!crl_reload_interval || !ca_cert_file) + return; + + struct os_reltime *previous = &tls_ctx_global.crl_reload_previous; + struct os_reltime now; + if (os_get_reltime(&now) != 0 + || !os_reltime_expired(&now, previous, crl_reload_interval)) + return; + + /* Note: modifying global state is not thread-safe + * if in use by existing connections + * + * src/utils/os.h does not provide a portable stat() + * or else it would be a good idea to check mtime and size, + * and avoid reloading if file has not changed */ + + if (tls_mbedtls_set_ca_and_crl(tls_ctx_global.tls_conf, ca_cert_file) == 0) + *previous = now; +} + + +static int tls_mbedtls_set_ca_cert(struct tls_conf *tls_conf, + const struct tls_connection_params *params) +{ + if (params->ca_cert) { + if (os_strncmp(params->ca_cert, "probe://", 8) == 0) { + tls_conf->ca_cert_probe = 1; + tls_conf->has_ca_cert = 1; + return 0; + } + + if (os_strncmp(params->ca_cert, "hash://", 7) == 0) { + const char *pos = params->ca_cert + 7; + if (os_strncmp(pos, "server/sha256/", 14) != 0) { + emsg(MSG_ERROR, "unsupported ca_cert hash value"); + return -1; + } + pos += 14; + if (os_strlen(pos) != SHA256_DIGEST_LENGTH*2) { + emsg(MSG_ERROR, "unexpected ca_cert hash length"); + return -1; + } + if (hexstr2bin(pos, tls_conf->ca_cert_hash, + SHA256_DIGEST_LENGTH) < 0) { + emsg(MSG_ERROR, "invalid ca_cert hash value"); + return -1; + } + emsg(MSG_DEBUG, "checking only server certificate match"); + tls_conf->verify_depth0_only = 1; + tls_conf->has_ca_cert = 1; + return 0; + } + + if (tls_mbedtls_set_ca_and_crl(tls_conf, params->ca_cert) != 0) + return -1; + } + if (params->ca_cert_blob) { + size_t len = params->ca_cert_blob_len; + int is_pem = tls_mbedtls_data_is_pem(params->ca_cert_blob); + if (len && params->ca_cert_blob[len-1] != '\0' && is_pem) + ++len; /*(include '\0' in len for PEM)*/ + int ret = mbedtls_x509_crt_parse(&tls_conf->ca_cert, + params->ca_cert_blob, len); + if (ret != 0) { + elog(ret, "mbedtls_x509_crt_parse"); + return -1; + } + if (is_pem) { /*(ca_cert_blob in DER format contains ca cert only)*/ + ret = tls_mbedtls_set_crl(tls_conf, params->ca_cert_blob, len); + if (ret != 0) { + elog(ret, "mbedtls_x509_crl_parse"); + return -1; + } + } + } + + if (mbedtls_x509_time_is_future(&tls_conf->ca_cert.valid_from) + || mbedtls_x509_time_is_past(&tls_conf->ca_cert.valid_to)) { + emsg(MSG_WARNING, "ca_cert expired or not yet valid"); + if (params->ca_cert) + emsg(MSG_WARNING, params->ca_cert); + } + + tls_conf->has_ca_cert = 1; + return 0; +} + + +static int tls_mbedtls_set_certs(struct tls_conf *tls_conf, + const struct tls_connection_params *params) +{ + int ret; + + if (params->ca_cert || params->ca_cert_blob) { + if (tls_mbedtls_set_ca_cert(tls_conf, params) != 0) + return -1; + } + else if (params->ca_path) { + emsg(MSG_INFO, "ca_path support not implemented"); + return -1; + } + + if (!tls_conf->has_ca_cert) + mbedtls_ssl_conf_authmode(&tls_conf->conf, MBEDTLS_SSL_VERIFY_NONE); + else { + /* Initial setting: REQUIRED for client, OPTIONAL for server + * (see also tls_connection_set_verify()) */ + tls_conf->verify_peer = (tls_ctx_global.tls_conf == NULL); + int authmode = tls_conf->verify_peer + ? MBEDTLS_SSL_VERIFY_REQUIRED + : MBEDTLS_SSL_VERIFY_OPTIONAL; + mbedtls_ssl_conf_authmode(&tls_conf->conf, authmode); + mbedtls_ssl_conf_ca_chain(&tls_conf->conf, + &tls_conf->ca_cert, + tls_conf->crl); + + if (!tls_connection_set_subject_match(tls_conf, params)) + return -1; + } + + if (params->client_cert2) /*(yes, server_cert2 in msg below)*/ + emsg(MSG_INFO, "server_cert2 support not implemented"); + + if (params->client_cert) { + size_t len; + u8 *data; + if (tls_mbedtls_readfile(params->client_cert, &data, &len)) + return -1; + ret = mbedtls_x509_crt_parse(&tls_conf->client_cert, data, len); + forced_memzero(data, len); + os_free(data); + } + if (params->client_cert_blob) { + size_t len = params->client_cert_blob_len; + if (len && params->client_cert_blob[len-1] != '\0' + && tls_mbedtls_data_is_pem(params->client_cert_blob)) + ++len; /*(include '\0' in len for PEM)*/ + ret = mbedtls_x509_crt_parse(&tls_conf->client_cert, + params->client_cert_blob, len); + } + if (params->client_cert || params->client_cert_blob) { + if (ret < 0) { + elog(ret, "mbedtls_x509_crt_parse"); + if (params->client_cert) + emsg(MSG_ERROR, params->client_cert); + return -1; + } + if (mbedtls_x509_time_is_future(&tls_conf->client_cert.valid_from) + || mbedtls_x509_time_is_past(&tls_conf->client_cert.valid_to)) { + emsg(MSG_WARNING, "cert expired or not yet valid"); + if (params->client_cert) + emsg(MSG_WARNING, params->client_cert); + } + tls_conf->has_client_cert = 1; + } + + if (params->private_key || params->private_key_blob) { + size_t len = params->private_key_blob_len; + u8 *data; + *(const u8 **)&data = params->private_key_blob; + if (len && data[len-1] != '\0' && tls_mbedtls_data_is_pem(data)) + ++len; /*(include '\0' in len for PEM)*/ + if (params->private_key + && tls_mbedtls_readfile(params->private_key, &data, &len)) { + return -1; + } + const char *pwd = params->private_key_passwd; + #if MBEDTLS_VERSION_NUMBER >= 0x03000000 /* mbedtls 3.0.0 */ + ret = mbedtls_pk_parse_key(&tls_conf->private_key, + data, len, + (const unsigned char *)pwd, + pwd ? os_strlen(pwd) : 0, + mbedtls_ctr_drbg_random, + tls_ctx_global.ctr_drbg); + #else + ret = mbedtls_pk_parse_key(&tls_conf->private_key, + data, len, + (const unsigned char *)pwd, + pwd ? os_strlen(pwd) : 0); + #endif + if (params->private_key) { + forced_memzero(data, len); + os_free(data); + } + if (ret < 0) { + elog(ret, "mbedtls_pk_parse_key"); + return -1; + } + tls_conf->has_private_key = 1; + } + + if (tls_conf->has_client_cert && tls_conf->has_private_key) { + ret = mbedtls_ssl_conf_own_cert( + &tls_conf->conf, &tls_conf->client_cert, &tls_conf->private_key); + if (ret < 0) { + elog(ret, "mbedtls_ssl_conf_own_cert"); + return -1; + } + } + + return 0; +} + + +/* mbedtls_x509_crt_profile_suiteb plus rsa_min_bitlen 2048 */ +/* (reference: see also mbedtls_x509_crt_profile_next) */ +/* ??? should permit SHA-512, too, and additional curves ??? */ +static const mbedtls_x509_crt_profile tls_mbedtls_crt_profile_suiteb128 = +{ + /* Only SHA-256 and 384 */ + MBEDTLS_X509_ID_FLAG( MBEDTLS_MD_SHA256 ) | + MBEDTLS_X509_ID_FLAG( MBEDTLS_MD_SHA384 ), + /* Only ECDSA */ + MBEDTLS_X509_ID_FLAG( MBEDTLS_PK_ECDSA ) | + MBEDTLS_X509_ID_FLAG( MBEDTLS_PK_ECKEY ), +#if defined(MBEDTLS_ECP_C) + /* Only NIST P-256 and P-384 */ + MBEDTLS_X509_ID_FLAG( MBEDTLS_ECP_DP_SECP256R1 ) | + MBEDTLS_X509_ID_FLAG( MBEDTLS_ECP_DP_SECP384R1 ), +#else + 0, +#endif + 2048, +}; + + +/* stricter than mbedtls_x509_crt_profile_suiteb */ +/* (reference: see also mbedtls_x509_crt_profile_next) */ +/* ??? should permit SHA-512, too, and additional curves ??? */ +static const mbedtls_x509_crt_profile tls_mbedtls_crt_profile_suiteb192 = +{ + /* Only SHA-384 */ + MBEDTLS_X509_ID_FLAG( MBEDTLS_MD_SHA384 ), + /* Only ECDSA */ + MBEDTLS_X509_ID_FLAG( MBEDTLS_PK_ECDSA ) | + MBEDTLS_X509_ID_FLAG( MBEDTLS_PK_ECKEY ), +#if defined(MBEDTLS_ECP_C) + /* Only NIST P-384 */ + MBEDTLS_X509_ID_FLAG( MBEDTLS_ECP_DP_SECP384R1 ), +#else + 0, +#endif + 3072, +}; + + +/* stricter than mbedtls_x509_crt_profile_suiteb except allow any PK alg */ +/* (reference: see also mbedtls_x509_crt_profile_next) */ +/* ??? should permit SHA-512, too, and additional curves ??? */ +static const mbedtls_x509_crt_profile tls_mbedtls_crt_profile_suiteb192_anypk = +{ + /* Only SHA-384 */ + MBEDTLS_X509_ID_FLAG( MBEDTLS_MD_SHA384 ), + 0xFFFFFFF, /* Any PK alg */ +#if defined(MBEDTLS_ECP_C) + /* Only NIST P-384 */ + MBEDTLS_X509_ID_FLAG( MBEDTLS_ECP_DP_SECP384R1 ), +#else + 0, +#endif + 3072, +}; + + +static int tls_mbedtls_set_params(struct tls_conf *tls_conf, + const struct tls_connection_params *params) +{ + tls_conf->flags = params->flags; + + if (tls_conf->flags & TLS_CONN_REQUIRE_OCSP_ALL) { + emsg(MSG_INFO, "ocsp=3 not supported"); + return -1; + } + + if (tls_conf->flags & TLS_CONN_REQUIRE_OCSP) { + emsg(MSG_INFO, "ocsp not supported"); + return -1; + } + + int suiteb128 = 0; + int suiteb192 = 0; + if (params->openssl_ciphers) { + if (os_strcmp(params->openssl_ciphers, "SUITEB192") == 0) { + suiteb192 = 1; + tls_conf->flags |= TLS_CONN_SUITEB; + } + if (os_strcmp(params->openssl_ciphers, "SUITEB128") == 0) { + suiteb128 = 1; + tls_conf->flags |= TLS_CONN_SUITEB; + } + } + + int ret = mbedtls_ssl_config_defaults( + &tls_conf->conf, tls_ctx_global.tls_conf ? MBEDTLS_SSL_IS_SERVER + : MBEDTLS_SSL_IS_CLIENT, + MBEDTLS_SSL_TRANSPORT_STREAM, + (tls_conf->flags & TLS_CONN_SUITEB) ? MBEDTLS_SSL_PRESET_SUITEB + : MBEDTLS_SSL_PRESET_DEFAULT); + if (ret != 0) { + elog(ret, "mbedtls_ssl_config_defaults"); + return -1; + } + + if (suiteb128) { + mbedtls_ssl_conf_cert_profile(&tls_conf->conf, + &tls_mbedtls_crt_profile_suiteb128); + mbedtls_ssl_conf_dhm_min_bitlen(&tls_conf->conf, 2048); + } + else if (suiteb192) { + mbedtls_ssl_conf_cert_profile(&tls_conf->conf, + &tls_mbedtls_crt_profile_suiteb192); + mbedtls_ssl_conf_dhm_min_bitlen(&tls_conf->conf, 3072); + } + else if (tls_conf->flags & TLS_CONN_SUITEB) { + /* treat as suiteb192 while allowing any PK algorithm */ + mbedtls_ssl_conf_cert_profile(&tls_conf->conf, + &tls_mbedtls_crt_profile_suiteb192_anypk); + mbedtls_ssl_conf_dhm_min_bitlen(&tls_conf->conf, 3072); + } + + tls_mbedtls_set_allowed_tls_vers(tls_conf, &tls_conf->conf); + ret = tls_mbedtls_set_certs(tls_conf, params); + if (ret != 0) + return -1; + + if (params->dh_file + && !tls_mbedtls_set_dhparams(tls_conf, params->dh_file)) { + return -1; + } + + if (params->openssl_ecdh_curves + && !tls_mbedtls_set_curves(tls_conf, params->openssl_ecdh_curves)) { + return -1; + } + + if (params->openssl_ciphers) { + if (!tls_mbedtls_set_ciphers(tls_conf, params->openssl_ciphers)) + return -1; + } + else if (tls_conf->flags & TLS_CONN_SUITEB) { + /* special-case a select set of ciphers for hwsim tests */ + if (!tls_mbedtls_set_ciphers(tls_conf, + (tls_conf->flags & TLS_CONN_SUITEB_NO_ECDH) + ? "DHE-RSA-AES256-GCM-SHA384" + : "ECDHE-RSA-AES256-GCM-SHA384:DHE-RSA-AES256-GCM-SHA384")) + return -1; + } + + return 0; +} + + +int tls_connection_set_params(void *tls_ctx, struct tls_connection *conn, + const struct tls_connection_params *params) +{ + if (conn == NULL || params == NULL) + return -1; + + tls_conf_deinit(conn->tls_conf); + struct tls_conf *tls_conf = conn->tls_conf = tls_conf_init(tls_ctx); + if (tls_conf == NULL) + return -1; + + if (tls_ctx_global.tls_conf) { + tls_conf->check_crl = tls_ctx_global.tls_conf->check_crl; + tls_conf->check_crl_strict = tls_ctx_global.tls_conf->check_crl_strict; + /*(tls_openssl.c inherits check_cert_subject from global conf)*/ + if (tls_ctx_global.tls_conf->check_cert_subject) { + tls_conf->check_cert_subject = + os_strdup(tls_ctx_global.tls_conf->check_cert_subject); + if (tls_conf->check_cert_subject == NULL) + return -1; + } + } + + if (tls_mbedtls_set_params(tls_conf, params) != 0) + return -1; + conn->verify_peer = tls_conf->verify_peer; + + return tls_mbedtls_ssl_setup(conn); +} + + +#ifdef TLS_MBEDTLS_SESSION_TICKETS + +static int tls_mbedtls_clienthello_session_ticket_prep (struct tls_connection *conn, + const u8 *data, size_t len) +{ + if (conn->tls_conf->flags & TLS_CONN_DISABLE_SESSION_TICKET) + return -1; + if (conn->clienthello_session_ticket) + tls_connection_deinit_clienthello_session_ticket(conn); + if (len) { + conn->clienthello_session_ticket = mbedtls_calloc(1, len); + if (conn->clienthello_session_ticket == NULL) + return -1; + conn->clienthello_session_ticket_len = len; + os_memcpy(conn->clienthello_session_ticket, data, len); + } + return 0; +} + + +static void tls_mbedtls_clienthello_session_ticket_set (struct tls_connection *conn) +{ + mbedtls_ssl_session *sess = conn->ssl.MBEDTLS_PRIVATE(session_negotiate); + if (sess->MBEDTLS_PRIVATE(ticket)) { + mbedtls_platform_zeroize(sess->MBEDTLS_PRIVATE(ticket), + sess->MBEDTLS_PRIVATE(ticket_len)); + mbedtls_free(sess->MBEDTLS_PRIVATE(ticket)); + } + sess->MBEDTLS_PRIVATE(ticket) = conn->clienthello_session_ticket; + sess->MBEDTLS_PRIVATE(ticket_len) = conn->clienthello_session_ticket_len; + sess->MBEDTLS_PRIVATE(ticket_lifetime) = 86400;/* XXX: can hint be 0? */ + + conn->clienthello_session_ticket = NULL; + conn->clienthello_session_ticket_len = 0; +} + + +static int tls_mbedtls_ssl_ticket_write(void *p_ticket, + const mbedtls_ssl_session *session, + unsigned char *start, + const unsigned char *end, + size_t *tlen, + uint32_t *lifetime) +{ + struct tls_connection *conn = p_ticket; + if (conn && conn->session_ticket_cb) { + /* see tls_mbedtls_clienthello_session_ticket_prep() */ + /* see tls_mbedtls_clienthello_session_ticket_set() */ + return 0; + } + + return mbedtls_ssl_ticket_write(&tls_ctx_global.ticket_ctx, + session, start, end, tlen, lifetime); +} + + +static int tls_mbedtls_ssl_ticket_parse(void *p_ticket, + mbedtls_ssl_session *session, + unsigned char *buf, + size_t len) +{ + /* XXX: TODO: not implemented in client; + * mbedtls_ssl_conf_session_tickets_cb() callbacks only for TLS server*/ + + if (len == 0) + return MBEDTLS_ERR_SSL_BAD_INPUT_DATA; + + struct tls_connection *conn = p_ticket; + if (conn && conn->session_ticket_cb) { + /* XXX: have random and secret been initialized yet? + * or must keys first be exported? + * EAP-FAST uses all args, EAP-TEAP only uses secret */ + struct tls_random data; + if (tls_connection_get_random(NULL, conn, &data) != 0) + return MBEDTLS_ERR_SSL_INTERNAL_ERROR; + int ret = + conn->session_ticket_cb(conn->session_ticket_cb_ctx, + buf, len, + data.client_random, + data.server_random, + conn->expkey_secret); + if (ret == 1) { + conn->resumed = 1; + return 0; + } + emsg(MSG_ERROR, "EAP session ticket ext not implemented"); + return MBEDTLS_ERR_SSL_INVALID_MAC; + /*(non-zero return used for mbedtls debug logging)*/ + } + + /* XXX: TODO always use tls_mbedtls_ssl_ticket_parse() for callback? */ + int rc = mbedtls_ssl_ticket_parse(&tls_ctx_global.ticket_ctx, + session, buf, len); + if (conn) + conn->resumed = (rc == 0); + return rc; +} + +#endif /* TLS_MBEDTLS_SESSION_TICKETS */ + + +__attribute_cold__ +int tls_global_set_params(void *tls_ctx, + const struct tls_connection_params *params) +{ + /* XXX: why might global_set_params be called more than once? */ + if (tls_ctx_global.tls_conf) + tls_conf_deinit(tls_ctx_global.tls_conf); + tls_ctx_global.tls_conf = tls_conf_init(tls_ctx); + if (tls_ctx_global.tls_conf == NULL) + return -1; + + #ifdef MBEDTLS_SSL_SESSION_TICKETS + #ifdef MBEDTLS_SSL_TICKET_C + if (!(params->flags & TLS_CONN_DISABLE_SESSION_TICKET)) + #ifdef TLS_MBEDTLS_SESSION_TICKETS + mbedtls_ssl_conf_session_tickets_cb(&tls_ctx_global.tls_conf->conf, + tls_mbedtls_ssl_ticket_write, + tls_mbedtls_ssl_ticket_parse, + NULL); + #else + mbedtls_ssl_conf_session_tickets_cb(&tls_ctx_global.tls_conf->conf, + mbedtls_ssl_ticket_write, + mbedtls_ssl_ticket_parse, + &tls_ctx_global.ticket_ctx); + #endif + #endif + #endif + + os_free(tls_ctx_global.ocsp_stapling_response); + tls_ctx_global.ocsp_stapling_response = NULL; + if (params->ocsp_stapling_response) + tls_ctx_global.ocsp_stapling_response = + os_strdup(params->ocsp_stapling_response); + + os_free(tls_ctx_global.ca_cert_file); + tls_ctx_global.ca_cert_file = NULL; + if (params->ca_cert) + tls_ctx_global.ca_cert_file = os_strdup(params->ca_cert); + return tls_mbedtls_set_params(tls_ctx_global.tls_conf, params); +} + + +int tls_global_set_verify(void *tls_ctx, int check_crl, int strict) +{ + tls_ctx_global.tls_conf->check_crl = check_crl; + tls_ctx_global.tls_conf->check_crl_strict = strict; /*(time checks)*/ + return 0; +} + + +int tls_connection_set_verify(void *tls_ctx, struct tls_connection *conn, + int verify_peer, unsigned int flags, + const u8 *session_ctx, size_t session_ctx_len) +{ + /*(EAP server-side calls this from eap_server_tls_ssl_init())*/ + if (conn == NULL) + return -1; + + conn->tls_conf->flags |= flags;/* TODO: reprocess flags, if necessary */ + + int authmode; + switch (verify_peer) { + case 2: authmode = MBEDTLS_SSL_VERIFY_OPTIONAL; break;/*(eap_teap_init())*/ + case 1: authmode = MBEDTLS_SSL_VERIFY_REQUIRED; break; + default: authmode = MBEDTLS_SSL_VERIFY_NONE; break; + } + mbedtls_ssl_set_hs_authmode(&conn->ssl, authmode); + + if ((conn->verify_peer = (authmode != MBEDTLS_SSL_VERIFY_NONE))) + mbedtls_ssl_set_verify(&conn->ssl, tls_mbedtls_verify_cb, conn); + else + mbedtls_ssl_set_verify(&conn->ssl, NULL, NULL); + + return 0; +} + + +#if MBEDTLS_VERSION_NUMBER >= 0x03000000 /* mbedtls 3.0.0 */ +static void tls_connection_export_keys_cb( + void *p_expkey, mbedtls_ssl_key_export_type secret_type, + const unsigned char *secret, size_t secret_len, + const unsigned char client_random[MBEDTLS_EXPKEY_RAND_LEN], + const unsigned char server_random[MBEDTLS_EXPKEY_RAND_LEN], + mbedtls_tls_prf_types tls_prf_type) +{ + struct tls_connection *conn = p_expkey; + conn->tls_prf_type = tls_prf_type; + if (!tls_prf_type) + return; + if (secret_len > sizeof(conn->expkey_secret)) { + emsg(MSG_ERROR, "tls_connection_export_keys_cb secret too long"); + conn->tls_prf_type = MBEDTLS_SSL_TLS_PRF_NONE; /* 0 */ + return; + } + conn->expkey_secret_len = secret_len; + os_memcpy(conn->expkey_secret, secret, secret_len); + os_memcpy(conn->expkey_randbytes, + client_random, MBEDTLS_EXPKEY_RAND_LEN); + os_memcpy(conn->expkey_randbytes + MBEDTLS_EXPKEY_RAND_LEN, + server_random, MBEDTLS_EXPKEY_RAND_LEN); +} +#elif MBEDTLS_VERSION_NUMBER >= 0x02120000 /* mbedtls 2.18.0 */ +static int tls_connection_export_keys_cb( + void *p_expkey, + const unsigned char *ms, + const unsigned char *kb, + size_t maclen, + size_t keylen, + size_t ivlen, + const unsigned char client_random[MBEDTLS_EXPKEY_RAND_LEN], + const unsigned char server_random[MBEDTLS_EXPKEY_RAND_LEN], + mbedtls_tls_prf_types tls_prf_type ) +{ + struct tls_connection *conn = p_expkey; + conn->tls_prf_type = tls_prf_type; + if (!tls_prf_type) + return -1; /*(return value ignored by mbedtls)*/ + conn->expkey_keyblock_size = maclen + keylen + ivlen; + conn->expkey_secret_len = MBEDTLS_EXPKEY_FIXED_SECRET_LEN; + os_memcpy(conn->expkey_secret, ms, MBEDTLS_EXPKEY_FIXED_SECRET_LEN); + os_memcpy(conn->expkey_randbytes, + client_random, MBEDTLS_EXPKEY_RAND_LEN); + os_memcpy(conn->expkey_randbytes + MBEDTLS_EXPKEY_RAND_LEN, + server_random, MBEDTLS_EXPKEY_RAND_LEN); + return 0; +} +#endif + + +int tls_connection_get_random(void *tls_ctx, struct tls_connection *conn, + struct tls_random *data) +{ + if (!conn || !conn->tls_prf_type) + return -1; + data->client_random = conn->expkey_randbytes; + data->client_random_len = MBEDTLS_EXPKEY_RAND_LEN; + data->server_random = conn->expkey_randbytes + MBEDTLS_EXPKEY_RAND_LEN; + data->server_random_len = MBEDTLS_EXPKEY_RAND_LEN; + return 0; +} + + +int tls_connection_export_key(void *tls_ctx, struct tls_connection *conn, + const char *label, const u8 *context, + size_t context_len, u8 *out, size_t out_len) +{ + /* (EAP-PEAP EAP-TLS EAP-TTLS) */ + #if MBEDTLS_VERSION_NUMBER >= 0x02120000 /* mbedtls 2.18.0 */ + return (conn && conn->established && conn->tls_prf_type) + ? mbedtls_ssl_tls_prf(conn->tls_prf_type, + conn->expkey_secret, conn->expkey_secret_len, label, + conn->expkey_randbytes, + sizeof(conn->expkey_randbytes), out, out_len) + : -1; + #else + /* not implemented here for mbedtls < 2.18.0 */ + return -1; + #endif +} + + +#ifdef TLS_MBEDTLS_EAP_FAST + +#if MBEDTLS_VERSION_NUMBER >= 0x03000000 /* mbedtls 3.0.0 */ +/* keyblock size info is not exposed in mbed TLS 3.0.0 */ +/* extracted from mbedtls library/ssl_tls.c:ssl_tls12_populate_transform() */ +#include +#include +static size_t tls_mbedtls_ssl_keyblock_size (mbedtls_ssl_context *ssl) +{ + #if !defined(MBEDTLS_USE_PSA_CRYPTO) /* XXX: (not extracted for PSA crypto) */ + #if defined(MBEDTLS_SSL_PROTO_TLS1_3) + if (mbedtls_ssl_get_version_number(ssl) == MBEDTLS_SSL_VERSION_TLS1_3) + return 0; /* (calculation not extracted) */ + #endif /* MBEDTLS_SSL_PROTO_TLS1_3 */ + + int ciphersuite = mbedtls_ssl_get_ciphersuite_id_from_ssl(ssl); + const mbedtls_ssl_ciphersuite_t *ciphersuite_info = + mbedtls_ssl_ciphersuite_from_id(ciphersuite); + if (ciphersuite_info == NULL) + return 0; + + const mbedtls_cipher_info_t *cipher_info = + mbedtls_cipher_info_from_type(ciphersuite_info->MBEDTLS_PRIVATE(cipher)); + if (cipher_info == NULL) + return 0; + + #if MBEDTLS_VERSION_NUMBER >= 0x03010000 /* mbedtls 3.1.0 */ + size_t keylen = mbedtls_cipher_info_get_key_bitlen(cipher_info) / 8; + mbedtls_cipher_mode_t mode = mbedtls_cipher_info_get_mode(cipher_info); + #else + size_t keylen = cipher_info->MBEDTLS_PRIVATE(key_bitlen) / 8; + mbedtls_cipher_mode_t mode = cipher_info->MBEDTLS_PRIVATE(mode); + #endif + #if defined(MBEDTLS_GCM_C) || \ + defined(MBEDTLS_CCM_C) || \ + defined(MBEDTLS_CHACHAPOLY_C) + if (mode == MBEDTLS_MODE_GCM || mode == MBEDTLS_MODE_CCM) + return keylen + 4; + else if (mode == MBEDTLS_MODE_CHACHAPOLY) + return keylen + 12; + else + #endif /* MBEDTLS_GCM_C || MBEDTLS_CCM_C || MBEDTLS_CHACHAPOLY_C */ + #if defined(MBEDTLS_SSL_SOME_SUITES_USE_MAC) + { + const mbedtls_md_info_t *md_info = + mbedtls_md_info_from_type(ciphersuite_info->MBEDTLS_PRIVATE(mac)); + if (md_info == NULL) + return 0; + size_t mac_key_len = mbedtls_md_get_size(md_info); + size_t ivlen = mbedtls_cipher_info_get_iv_size(cipher_info); + return keylen + mac_key_len + ivlen; + } + #endif /* MBEDTLS_SSL_SOME_SUITES_USE_MAC */ + #endif /* !MBEDTLS_USE_PSA_CRYPTO *//* (not extracted for PSA crypto) */ + return 0; +} +#endif /* MBEDTLS_VERSION_NUMBER >= 0x03000000 *//* mbedtls 3.0.0 */ + + +int tls_connection_get_eap_fast_key(void *tls_ctx, struct tls_connection *conn, + u8 *out, size_t out_len) +{ + /* XXX: has export keys callback been run? */ + if (!conn || !conn->tls_prf_type) + return -1; + + #if MBEDTLS_VERSION_NUMBER >= 0x03000000 /* mbedtls 3.0.0 */ + conn->expkey_keyblock_size = tls_mbedtls_ssl_keyblock_size(&conn->ssl); + if (conn->expkey_keyblock_size == 0) + return -1; + #endif + size_t skip = conn->expkey_keyblock_size * 2; + unsigned char *tmp_out = os_malloc(skip + out_len); + if (!tmp_out) + return -1; + + /* server_random and then client_random */ + unsigned char seed[MBEDTLS_EXPKEY_RAND_LEN*2]; + os_memcpy(seed, conn->expkey_randbytes + MBEDTLS_EXPKEY_RAND_LEN, + MBEDTLS_EXPKEY_RAND_LEN); + os_memcpy(seed + MBEDTLS_EXPKEY_RAND_LEN, conn->expkey_randbytes, + MBEDTLS_EXPKEY_RAND_LEN); + + #if MBEDTLS_VERSION_NUMBER >= 0x02120000 /* mbedtls 2.18.0 */ + int ret = mbedtls_ssl_tls_prf(conn->tls_prf_type, + conn->expkey_secret, conn->expkey_secret_len, + "key expansion", seed, sizeof(seed), + tmp_out, skip + out_len); + if (ret == 0) + os_memcpy(out, tmp_out + skip, out_len); + #else + int ret = -1; /*(not reached if not impl; return -1 at top of func)*/ + #endif + + bin_clear_free(tmp_out, skip + out_len); + forced_memzero(seed, sizeof(seed)); + return ret; +} + +#endif /* TLS_MBEDTLS_EAP_FAST */ + + +__attribute_cold__ +static void tls_mbedtls_suiteb_handshake_alert (struct tls_connection *conn) +{ + /* tests/hwsim/test_suite_b.py test_suite_b_192_rsa_insufficient_dh */ + if (!(conn->tls_conf->flags & TLS_CONN_SUITEB)) + return; + if (tls_ctx_global.tls_conf) /*(is server; want issue event on client)*/ + return; + #if 0 + /*(info not available on client; + * mbed TLS library enforces dhm min bitlen in ServerKeyExchange)*/ + if (MBEDTLS_TLS_DHE_RSA_WITH_AES_256_GCM_SHA384 == + #if MBEDTLS_VERSION_NUMBER < 0x03020000 /* mbedtls 3.2.0 */ + mbedtls_ssl_get_ciphersuite_id_from_ssl(&conn->ssl) + #else + mbedtls_ssl_get_ciphersuite_id( + mbedtls_ssl_get_ciphersuite(&conn->ssl)) + #endif + && mbedtls_mpi_size(&conn->tls_conf->conf.MBEDTLS_PRIVATE(dhm_P)) + < 384 /*(3072/8)*/) + #endif + { + struct tls_config *init_conf = &tls_ctx_global.init_conf; + if (init_conf->event_cb) { + union tls_event_data ev; + os_memset(&ev, 0, sizeof(ev)); + ev.alert.is_local = 1; + ev.alert.type = "fatal"; + /*"internal error" string for tests/hwsim/test_suiteb.py */ + ev.alert.description = "internal error: handshake failure"; + /*ev.alert.description = "insufficient security";*/ + init_conf->event_cb(init_conf->cb_ctx, TLS_ALERT, &ev); + } + } +} + + +struct wpabuf * tls_connection_handshake(void *tls_ctx, + struct tls_connection *conn, + const struct wpabuf *in_data, + struct wpabuf **appl_data) +{ + if (appl_data) + *appl_data = NULL; + + if (in_data && wpabuf_len(in_data)) { + /*(unsure why tls_gnutls.c discards buffer contents; skip here)*/ + if (conn->pull_buf && 0) /* disable; appears unwise */ + tls_pull_buf_discard(conn, __func__); + if (!tls_pull_buf_append(conn, in_data)) + return NULL; + } + + if (conn->tls_conf == NULL) { + struct tls_connection_params params; + os_memset(¶ms, 0, sizeof(params)); + params.openssl_ciphers = + tls_ctx_global.init_conf.openssl_ciphers; + params.flags = tls_ctx_global.tls_conf->flags; + if (tls_connection_set_params(tls_ctx, conn, ¶ms) != 0) + return NULL; + } + + if (conn->verify_peer) /*(call here might be redundant; nbd)*/ + mbedtls_ssl_set_verify(&conn->ssl, tls_mbedtls_verify_cb, conn); + + #ifdef TLS_MBEDTLS_SESSION_TICKETS + if (conn->clienthello_session_ticket) + /*(starting handshake for EAP-FAST and EAP-TEAP)*/ + tls_mbedtls_clienthello_session_ticket_set(conn); + + /* (not thread-safe due to need to set userdata 'conn' for callback) */ + /* (unable to use mbedtls_ssl_set_user_data_p() with mbedtls 3.2.0+ + * since ticket write and parse callbacks take (mbedtls_ssl_session *) + * param instead of (mbedtls_ssl_context *) param) */ + if (conn->tls_conf->flags & TLS_CONN_DISABLE_SESSION_TICKET) + mbedtls_ssl_conf_session_tickets_cb(&conn->tls_conf->conf, + NULL, NULL, NULL); + else + mbedtls_ssl_conf_session_tickets_cb(&conn->tls_conf->conf, + tls_mbedtls_ssl_ticket_write, + tls_mbedtls_ssl_ticket_parse, + conn); + #endif + + #if MBEDTLS_VERSION_NUMBER >= 0x03020000 /* mbedtls 3.2.0 */ + int ret = mbedtls_ssl_handshake(&conn->ssl); + #else + int ret = 0; + while (conn->ssl.MBEDTLS_PRIVATE(state) != MBEDTLS_SSL_HANDSHAKE_OVER) { + ret = mbedtls_ssl_handshake_step(&conn->ssl); + if (ret != 0) + break; + } + #endif + + #ifdef TLS_MBEDTLS_SESSION_TICKETS + mbedtls_ssl_conf_session_tickets_cb(&conn->tls_conf->conf, + tls_mbedtls_ssl_ticket_write, + tls_mbedtls_ssl_ticket_parse, + NULL); + #endif + + switch (ret) { + case 0: + conn->established = 1; + if (conn->push_buf == NULL) + /* Need to return something to get final TLS ACK. */ + conn->push_buf = wpabuf_alloc(0); + + if (appl_data /*&& conn->pull_buf && wpabuf_len(conn->pull_buf)*/) + *appl_data = NULL; /* RFE: check for application data */ + break; + case MBEDTLS_ERR_SSL_WANT_WRITE: + case MBEDTLS_ERR_SSL_WANT_READ: + case MBEDTLS_ERR_SSL_CRYPTO_IN_PROGRESS: + case MBEDTLS_ERR_SSL_ASYNC_IN_PROGRESS: + if (tls_ctx_global.tls_conf /*(is server)*/ + && conn->established && conn->push_buf == NULL) + /* Need to return something to trigger completion of EAP-TLS. */ + conn->push_buf = wpabuf_alloc(0); + break; + default: + ++conn->failed; + switch (ret) { + case MBEDTLS_ERR_SSL_CLIENT_RECONNECT: + case MBEDTLS_ERR_NET_CONN_RESET: + case MBEDTLS_ERR_NET_SEND_FAILED: + ++conn->write_alerts; + break; + #if MBEDTLS_VERSION_NUMBER >= 0x03000000 /* mbedtls 3.0.0 */ + case MBEDTLS_ERR_SSL_HANDSHAKE_FAILURE: + #else + case MBEDTLS_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE: + #endif + tls_mbedtls_suiteb_handshake_alert(conn); + /* fall through */ + case MBEDTLS_ERR_NET_RECV_FAILED: + case MBEDTLS_ERR_SSL_CONN_EOF: + case MBEDTLS_ERR_SSL_PEER_CLOSE_NOTIFY: + case MBEDTLS_ERR_SSL_FATAL_ALERT_MESSAGE: + ++conn->read_alerts; + break; + default: + break; + } + + ilog(ret, "mbedtls_ssl_handshake"); + break; + } + + struct wpabuf *out_data = conn->push_buf; + conn->push_buf = NULL; + return out_data; +} + + +struct wpabuf * tls_connection_server_handshake(void *tls_ctx, + struct tls_connection *conn, + const struct wpabuf *in_data, + struct wpabuf **appl_data) +{ + conn->is_server = 1; + return tls_connection_handshake(tls_ctx, conn, in_data, appl_data); +} + + +struct wpabuf * tls_connection_encrypt(void *tls_ctx, + struct tls_connection *conn, + const struct wpabuf *in_data) +{ + int res = mbedtls_ssl_write(&conn->ssl, + wpabuf_head_u8(in_data), wpabuf_len(in_data)); + if (res < 0) { + elog(res, "mbedtls_ssl_write"); + return NULL; + } + + struct wpabuf *buf = conn->push_buf; + conn->push_buf = NULL; + return buf; +} + + +struct wpabuf * tls_connection_decrypt(void *tls_ctx, + struct tls_connection *conn, + const struct wpabuf *in_data) +{ + int res; + struct wpabuf *out; + + /*assert(in_data != NULL);*/ + if (!tls_pull_buf_append(conn, in_data)) + return NULL; + + #if defined(MBEDTLS_ZLIB_SUPPORT) /* removed in mbedtls 3.x */ + /* Add extra buffer space to handle the possibility of decrypted + * data being longer than input data due to TLS compression. */ + out = wpabuf_alloc((wpabuf_len(in_data) + 500) * 3); + #else /* TLS compression is disabled in mbedtls 3.x */ + out = wpabuf_alloc(wpabuf_len(in_data)); + #endif + if (out == NULL) + return NULL; + + res = mbedtls_ssl_read(&conn->ssl, wpabuf_mhead(out), wpabuf_size(out)); + if (res < 0) { + #if 1 /*(seems like a different error if wpabuf_len(in_data) == 0)*/ + if (res == MBEDTLS_ERR_SSL_WANT_READ) + return out; + #endif + elog(res, "mbedtls_ssl_read"); + wpabuf_free(out); + return NULL; + } + wpabuf_put(out, res); + + return out; +} + + +int tls_connection_resumed(void *tls_ctx, struct tls_connection *conn) +{ + /* XXX: might need to detect if session resumed from TLS session ticket + * even if not special session ticket handling for EAP-FAST, EAP-TEAP */ + /* (?ssl->handshake->resume during session ticket validation?) */ + return conn && conn->resumed; +} + + +#ifdef TLS_MBEDTLS_EAP_FAST +int tls_connection_set_cipher_list(void *tls_ctx, struct tls_connection *conn, + u8 *ciphers) +{ + /* ciphers is list of TLS_CIPHER_* from hostap/src/crypto/tls.h */ + int ids[7]; + const int idsz = (int)sizeof(ids); + int nids = -1, id; + for ( ; *ciphers != TLS_CIPHER_NONE; ++ciphers) { + switch (*ciphers) { + case TLS_CIPHER_RC4_SHA: + #ifdef MBEDTLS_TLS_RSA_WITH_RC4_128_SHA + id = MBEDTLS_TLS_RSA_WITH_RC4_128_SHA; + break; + #else + continue; /*(not supported in mbedtls 3.x; ignore)*/ + #endif + case TLS_CIPHER_AES128_SHA: + id = MBEDTLS_TLS_RSA_WITH_AES_128_CBC_SHA; + break; + case TLS_CIPHER_RSA_DHE_AES128_SHA: + id = MBEDTLS_TLS_DHE_RSA_WITH_AES_128_CBC_SHA; + break; + case TLS_CIPHER_ANON_DH_AES128_SHA: + continue; /*(not supported in mbedtls; ignore)*/ + case TLS_CIPHER_RSA_DHE_AES256_SHA: + id = MBEDTLS_TLS_DHE_RSA_WITH_AES_256_CBC_SHA; + break; + case TLS_CIPHER_AES256_SHA: + id = MBEDTLS_TLS_RSA_WITH_AES_256_CBC_SHA; + break; + default: + return -1; /* should not happen */ + } + if (++nids == idsz) + return -1; /* should not happen */ + ids[nids] = id; + } + if (nids < 0) + return 0; /* nothing to do */ + if (++nids == idsz) + return -1; /* should not happen */ + ids[nids] = 0; /* terminate list */ + ++nids; + + return tls_mbedtls_set_ciphersuites(conn->tls_conf, ids, nids) ? 0 : -1; +} +#endif + + +int tls_get_version(void *ssl_ctx, struct tls_connection *conn, + char *buf, size_t buflen) +{ + if (conn == NULL) + return -1; + os_strlcpy(buf, mbedtls_ssl_get_version(&conn->ssl), buflen); + return buf[0] != 'u' ? 0 : -1; /*(-1 if "unknown")*/ +} + + +#ifdef TLS_MBEDTLS_EAP_TEAP +u16 tls_connection_get_cipher_suite(struct tls_connection *conn) +{ + if (conn == NULL) + return 0; + return (u16)mbedtls_ssl_get_ciphersuite_id_from_ssl(&conn->ssl); +} +#endif + + +int tls_get_cipher(void *tls_ctx, struct tls_connection *conn, + char *buf, size_t buflen) +{ + if (conn == NULL) + return -1; + const int id = mbedtls_ssl_get_ciphersuite_id_from_ssl(&conn->ssl); + return tls_mbedtls_translate_ciphername(id, buf, buflen) ? 0 : -1; +} + + +#ifdef TLS_MBEDTLS_SESSION_TICKETS + +int tls_connection_enable_workaround(void *tls_ctx, + struct tls_connection *conn) +{ + /* (see comment in src/eap_peer/eap_fast.c:eap_fast_init()) */ + /* XXX: is there a relevant setting for this in mbed TLS? */ + /* (do we even care that much about older CBC ciphers?) */ + return 0; +} + + +int tls_connection_client_hello_ext(void *tls_ctx, struct tls_connection *conn, + int ext_type, const u8 *data, + size_t data_len) +{ + /* (EAP-FAST and EAP-TEAP) */ + if (ext_type == MBEDTLS_TLS_EXT_SESSION_TICKET) /*(ext_type == 35)*/ + return tls_mbedtls_clienthello_session_ticket_prep(conn, data, + data_len); + + return -1; +} + +#endif /* TLS_MBEDTLS_SESSION_TICKETS */ + + +int tls_connection_get_failed(void *tls_ctx, struct tls_connection *conn) +{ + return conn ? conn->failed : -1; +} + + +int tls_connection_get_read_alerts(void *tls_ctx, struct tls_connection *conn) +{ + return conn ? conn->read_alerts : -1; +} + + +int tls_connection_get_write_alerts(void *tls_ctx, + struct tls_connection *conn) +{ + return conn ? conn->write_alerts : -1; +} + + +#ifdef TLS_MBEDTLS_SESSION_TICKETS +int tls_connection_set_session_ticket_cb( + void *tls_ctx, struct tls_connection *conn, + tls_session_ticket_cb cb, void *ctx) +{ + if (!(conn->tls_conf->flags & TLS_CONN_DISABLE_SESSION_TICKET)) { + /* (EAP-FAST and EAP-TEAP) */ + conn->session_ticket_cb = cb; + conn->session_ticket_cb_ctx = ctx; + return 0; + } + return -1; +} +#endif + + +int tls_get_library_version(char *buf, size_t buf_len) +{ + #ifndef MBEDTLS_VERSION_C + const char * const ver = "n/a"; + #else + char ver[9]; + mbedtls_version_get_string(ver); + #endif + return os_snprintf(buf, buf_len, + "mbed TLS build=" MBEDTLS_VERSION_STRING " run=%s", ver); +} + + +void tls_connection_set_success_data(struct tls_connection *conn, + struct wpabuf *data) +{ + wpabuf_free(conn->success_data); + conn->success_data = data; +} + + +void tls_connection_set_success_data_resumed(struct tls_connection *conn) +{ +} + + +const struct wpabuf * +tls_connection_get_success_data(struct tls_connection *conn) +{ + return conn->success_data; +} + + +void tls_connection_remove_session(struct tls_connection *conn) +{ +} + + +#ifdef TLS_MBEDTLS_EAP_TEAP +int tls_get_tls_unique(struct tls_connection *conn, u8 *buf, size_t max_len) +{ + #if defined(MBEDTLS_SSL_RENEGOTIATION) /* XXX: renegotiation or resumption? */ + /* data from TLS handshake Finished message */ + size_t verify_len = conn->ssl.MBEDTLS_PRIVATE(verify_data_len); + char *verify_data = (conn->is_server ^ conn->resumed) + ? conn->ssl.MBEDTLS_PRIVATE(peer_verify_data) + : conn->ssl.MBEDTLS_PRIVATE(own_verify_data); + if (verify_len && verify_len <= max_len) { + os_memcpy(buf, verify_data, verify_len); + return (int)verify_len; + } + #endif + return -1; +} +#endif + + +__attribute_noinline__ +static void tls_mbedtls_set_peer_subject(struct tls_connection *conn, const mbedtls_x509_crt *crt) +{ + if (conn->peer_subject) + return; + char buf[MBEDTLS_X509_MAX_DN_NAME_SIZE*2]; + int buflen = mbedtls_x509_dn_gets(buf, sizeof(buf), &crt->subject); + if (buflen >= 0 && (conn->peer_subject = os_malloc((size_t)buflen+1))) + os_memcpy(conn->peer_subject, buf, (size_t)buflen+1); +} + + +#ifdef TLS_MBEDTLS_EAP_TEAP +const char * tls_connection_get_peer_subject(struct tls_connection *conn) +{ + if (!conn) + return NULL; + if (!conn->peer_subject) { /*(if not set during cert verify)*/ + const mbedtls_x509_crt *peer_cert = + mbedtls_ssl_get_peer_cert(&conn->ssl); + if (peer_cert) + tls_mbedtls_set_peer_subject(conn, peer_cert); + } + return conn->peer_subject; +} +#endif + + +#ifdef TLS_MBEDTLS_EAP_TEAP +bool tls_connection_get_own_cert_used(struct tls_connection *conn) +{ + /* XXX: availability of cert does not necessary mean that client + * received certificate request from server and then sent cert. + * ? step handshake in tls_connection_handshake() looking for + * MBEDTLS_SSL_CERTIFICATE_REQUEST ? */ + const struct tls_conf * const tls_conf = conn->tls_conf; + return (tls_conf->has_client_cert && tls_conf->has_private_key); +} +#endif + + +#if defined(CONFIG_FIPS) +#define TLS_MBEDTLS_CONFIG_FIPS +#endif + +#if defined(CONFIG_SHA256) +#define TLS_MBEDTLS_TLS_PRF_SHA256 +#endif + +#if defined(CONFIG_SHA384) +#define TLS_MBEDTLS_TLS_PRF_SHA384 +#endif + + +#ifndef TLS_MBEDTLS_CONFIG_FIPS +#if defined(CONFIG_MODULE_TESTS) +/* unused with CONFIG_TLS=mbedtls except in crypto_module_tests.c */ +#if MBEDTLS_VERSION_NUMBER >= 0x02120000 /* mbedtls 2.18.0 */ \ + && MBEDTLS_VERSION_NUMBER < 0x03000000 /* mbedtls 3.0.0 */ +/* sha1-tlsprf.c */ +#include "sha1.h" +int tls_prf_sha1_md5(const u8 *secret, size_t secret_len, const char *label, + const u8 *seed, size_t seed_len, u8 *out, size_t outlen) +{ + return mbedtls_ssl_tls_prf(MBEDTLS_SSL_TLS_PRF_TLS1, + secret, secret_len, label, + seed, seed_len, out, outlen) ? -1 : 0; +} +#else +#include "sha1-tlsprf.c" /* pull in hostap local implementation */ +#endif +#endif +#endif + +#ifdef TLS_MBEDTLS_TLS_PRF_SHA256 +/* sha256-tlsprf.c */ +#if MBEDTLS_VERSION_NUMBER >= 0x02120000 /* mbedtls 2.18.0 */ +#include "sha256.h" +int tls_prf_sha256(const u8 *secret, size_t secret_len, const char *label, + const u8 *seed, size_t seed_len, u8 *out, size_t outlen) +{ + return mbedtls_ssl_tls_prf(MBEDTLS_SSL_TLS_PRF_SHA256, + secret, secret_len, label, + seed, seed_len, out, outlen) ? -1 : 0; +} +#else +#include "sha256-tlsprf.c" /* pull in hostap local implementation */ +#endif +#endif + +#ifdef TLS_MBEDTLS_TLS_PRF_SHA384 +/* sha384-tlsprf.c */ +#if MBEDTLS_VERSION_NUMBER >= 0x02120000 /* mbedtls 2.18.0 */ +#include "sha384.h" +int tls_prf_sha384(const u8 *secret, size_t secret_len, const char *label, + const u8 *seed, size_t seed_len, u8 *out, size_t outlen) +{ + return mbedtls_ssl_tls_prf(MBEDTLS_SSL_TLS_PRF_SHA384, + secret, secret_len, label, + seed, seed_len, out, outlen) ? -1 : 0; +} +#else +#include "sha384-tlsprf.c" /* pull in hostap local implementation */ +#endif +#endif + + +#if MBEDTLS_VERSION_NUMBER < 0x03020000 /* mbedtls 3.2.0 */ +#define mbedtls_x509_crt_has_ext_type(crt, ext_type) \ + ((crt)->MBEDTLS_PRIVATE(ext_types) & (ext_type)) +#endif + +struct mlist { const char *p; size_t n; }; + + +static int +tls_mbedtls_match_altsubject(mbedtls_x509_crt *crt, const char *match) +{ + /* RFE: this could be pre-parsed into structured data at config time */ + struct mlist list[256]; /*(much larger than expected)*/ + int nlist = 0; + if ( os_strncmp(match, "EMAIL:", 6) != 0 + && os_strncmp(match, "DNS:", 4) != 0 + && os_strncmp(match, "URI:", 4) != 0 ) { + wpa_printf(MSG_INFO, "MTLS: Invalid altSubjectName match '%s'", match); + return 0; + } + for (const char *s = match, *tok; *s; s = tok ? tok+1 : "") { + do { } while ((tok = os_strchr(s, ';')) + && os_strncmp(tok+1, "EMAIL:", 6) != 0 + && os_strncmp(tok+1, "DNS:", 4) != 0 + && os_strncmp(tok+1, "URI:", 4) != 0); + list[nlist].p = s; + list[nlist].n = tok ? (size_t)(tok - s) : os_strlen(s); + if (list[nlist].n && ++nlist == sizeof(list)/sizeof(*list)) { + wpa_printf(MSG_INFO, "MTLS: excessive altSubjectName match '%s'", + match); + break; /* truncate huge list and continue */ + } + } + + if (!mbedtls_x509_crt_has_ext_type(crt, MBEDTLS_X509_EXT_SUBJECT_ALT_NAME)) + return 0; + + const mbedtls_x509_sequence *cur = &crt->subject_alt_names; + for (; cur != NULL; cur = cur->next) { + const unsigned char san_type = (unsigned char)cur->buf.tag + & MBEDTLS_ASN1_TAG_VALUE_MASK; + char t; + size_t step = 4; + switch (san_type) { /* "EMAIL:" or "DNS:" or "URI:" */ + case MBEDTLS_X509_SAN_RFC822_NAME: step = 6; t = 'E'; break; + case MBEDTLS_X509_SAN_DNS_NAME: t = 'D'; break; + case MBEDTLS_X509_SAN_UNIFORM_RESOURCE_IDENTIFIER: t = 'U'; break; + default: continue; + } + + for (int i = 0; i < nlist; ++i) { + /* step over "EMAIL:" or "DNS:" or "URI:" in list[i].p */ + /* Note: v is not '\0'-terminated, but is a known length vlen, + * so okay to pass to os_strncasecmp() even though not z-string */ + if (cur->buf.len == list[i].n - step && t == *list[i].p + && 0 == os_strncasecmp((char *)cur->buf.p, + list[i].p+step, cur->buf.len)) { + return 1; /* match */ + } + } + } + return 0; /* no match */ +} + + +static int +tls_mbedtls_match_suffix(const char *v, size_t vlen, + const struct mlist *list, int nlist, int full) +{ + /* Note: v is not '\0'-terminated, but is a known length vlen, + * so okay to pass to os_strncasecmp() even though not z-string */ + for (int i = 0; i < nlist; ++i) { + size_t n = list[i].n; + if ((n == vlen || (n < vlen && v[vlen-n-1] == '.' && !full)) + && 0 == os_strncasecmp(v+vlen-n, list[i].p, n)) + return 1; /* match */ + } + return 0; /* no match */ +} + + +static int +tls_mbedtls_match_suffixes(mbedtls_x509_crt *crt, const char *match, int full) +{ + /* RFE: this could be pre-parsed into structured data at config time */ + struct mlist list[256]; /*(much larger than expected)*/ + int nlist = 0; + for (const char *s = match, *tok; *s; s = tok ? tok+1 : "") { + tok = os_strchr(s, ';'); + list[nlist].p = s; + list[nlist].n = tok ? (size_t)(tok - s) : os_strlen(s); + if (list[nlist].n && ++nlist == sizeof(list)/sizeof(*list)) { + wpa_printf(MSG_INFO, "MTLS: excessive suffix match '%s'", match); + break; /* truncate huge list and continue */ + } + } + + /* check subjectAltNames */ + if (mbedtls_x509_crt_has_ext_type(crt, MBEDTLS_X509_EXT_SUBJECT_ALT_NAME)) { + const mbedtls_x509_sequence *cur = &crt->subject_alt_names; + for (; cur != NULL; cur = cur->next) { + const unsigned char san_type = (unsigned char)cur->buf.tag + & MBEDTLS_ASN1_TAG_VALUE_MASK; + if (san_type == MBEDTLS_X509_SAN_DNS_NAME + && tls_mbedtls_match_suffix((char *)cur->buf.p, + cur->buf.len, + list, nlist, full)) { + return 1; /* match */ + } + } + } + + /* check subject CN */ + const mbedtls_x509_name *name = &crt->subject; + for (; name != NULL; name = name->next) { + if (name->oid.p && MBEDTLS_OID_CMP(MBEDTLS_OID_AT_CN, &name->oid) == 0) + break; + } + if (name && tls_mbedtls_match_suffix((char *)name->val.p, name->val.len, + list, nlist, full)) { + return 1; /* match */ + } + + return 0; /* no match */ +} + + +static int +tls_mbedtls_match_dn_field(mbedtls_x509_crt *crt, const char *match) +{ + /* RFE: this could be pre-parsed into structured data at config time */ + struct mlistoid { const char *p; size_t n; + const char *oid; size_t olen; + int prefix; }; + struct mlistoid list[32]; /*(much larger than expected)*/ + int nlist = 0; + for (const char *s = match, *tok, *e; *s; s = tok ? tok+1 : "") { + tok = os_strchr(s, '/'); + list[nlist].oid = NULL; + list[nlist].olen = 0; + list[nlist].n = tok ? (size_t)(tok - s) : os_strlen(s); + e = memchr(s, '=', list[nlist].n); + if (e == NULL) { + if (list[nlist].n == 0) + continue; /* skip consecutive, repeated '/' */ + if (list[nlist].n == 1 && *s == '*') { + /* special-case "*" to match any OID and value */ + s = e = "=*"; + list[nlist].n = 2; + list[nlist].oid = ""; + } + else { + wpa_printf(MSG_INFO, + "MTLS: invalid check_cert_subject '%s' missing '='", + match); + return 0; + } + } + switch (e - s) { + case 1: + if (*s == 'C') { + list[nlist].oid = MBEDTLS_OID_AT_COUNTRY; + list[nlist].olen = sizeof(MBEDTLS_OID_AT_COUNTRY)-1; + } + else if (*s == 'L') { + list[nlist].oid = MBEDTLS_OID_AT_LOCALITY; + list[nlist].olen = sizeof(MBEDTLS_OID_AT_LOCALITY)-1; + } + else if (*s == 'O') { + list[nlist].oid = MBEDTLS_OID_AT_ORGANIZATION; + list[nlist].olen = sizeof(MBEDTLS_OID_AT_ORGANIZATION)-1; + } + break; + case 2: + if (s[0] == 'C' && s[1] == 'N') { + list[nlist].oid = MBEDTLS_OID_AT_CN; + list[nlist].olen = sizeof(MBEDTLS_OID_AT_CN)-1; + } + else if (s[0] == 'S' && s[1] == 'T') { + list[nlist].oid = MBEDTLS_OID_AT_STATE; + list[nlist].olen = sizeof(MBEDTLS_OID_AT_STATE)-1; + } + else if (s[0] == 'O' && s[1] == 'U') { + list[nlist].oid = MBEDTLS_OID_AT_ORG_UNIT; + list[nlist].olen = sizeof(MBEDTLS_OID_AT_ORG_UNIT)-1; + } + break; + case 12: + if (os_memcmp(s, "emailAddress", 12) == 0) { + list[nlist].oid = MBEDTLS_OID_PKCS9_EMAIL; + list[nlist].olen = sizeof(MBEDTLS_OID_PKCS9_EMAIL)-1; + } + break; + default: + break; + } + if (list[nlist].oid == NULL) { + wpa_printf(MSG_INFO, + "MTLS: Unknown field in check_cert_subject '%s'", + match); + return 0; + } + list[nlist].n -= (size_t)(++e - s); + list[nlist].p = e; + if (list[nlist].n && e[list[nlist].n-1] == '*') { + --list[nlist].n; + list[nlist].prefix = 1; + } + /*(could easily add support for suffix matches if value begins with '*', + * but suffix match is not currently supported by other TLS modules)*/ + + if (list[nlist].n && ++nlist == sizeof(list)/sizeof(*list)) { + wpa_printf(MSG_INFO, + "MTLS: excessive check_cert_subject match '%s'", + match); + break; /* truncate huge list and continue */ + } + } + + /* each component in match string must match cert Subject in order listed + * The behavior below preserves ordering but is slightly different than + * the grossly inefficient contortions implemented in tls_openssl.c */ + const mbedtls_x509_name *name = &crt->subject; + for (int i = 0; i < nlist; ++i) { + int found = 0; + for (; name != NULL && !found; name = name->next) { + if (!name->oid.p) + continue; + /* special-case "*" to match any OID and value */ + if (list[i].olen == 0) { + found = 1; + continue; + } + /* perform equalent of !MBEDTLS_OID_CMP() with oid ptr and len */ + if (list[i].olen != name->oid.len + || os_memcmp(list[i].oid, name->oid.p, name->oid.len) != 0) + continue; + /* Note: v is not '\0'-terminated, but is a known length vlen, + * so okay to pass to os_strncasecmp() even though not z-string */ + if ((list[i].prefix + ? list[i].n <= name->val.len /* prefix match */ + : list[i].n == name->val.len) /* full match */ + && 0 == os_strncasecmp((char *)name->val.p, + list[i].p, list[i].n)) { + found = 1; + continue; + } + } + if (!found) + return 0; /* no match */ + } + return 1; /* match */ +} + + +__attribute_cold__ +static void +tls_mbedtls_verify_fail_event (mbedtls_x509_crt *crt, int depth, + const char *errmsg, enum tls_fail_reason reason) +{ + struct tls_config *init_conf = &tls_ctx_global.init_conf; + if (init_conf->event_cb == NULL) + return; + + struct wpabuf *certbuf = wpabuf_alloc_copy(crt->raw.p, crt->raw.len); + char subject[MBEDTLS_X509_MAX_DN_NAME_SIZE*2]; + if (mbedtls_x509_dn_gets(subject, sizeof(subject), &crt->subject) < 0) + subject[0] = '\0'; + union tls_event_data ev; + os_memset(&ev, 0, sizeof(ev)); + ev.cert_fail.reason = reason; + ev.cert_fail.depth = depth; + ev.cert_fail.subject = subject; + ev.cert_fail.reason_txt = errmsg; + ev.cert_fail.cert = certbuf; + + init_conf->event_cb(init_conf->cb_ctx, TLS_CERT_CHAIN_FAILURE, &ev); + + wpabuf_free(certbuf); +} + + +__attribute_noinline__ +static void +tls_mbedtls_verify_cert_event (struct tls_connection *conn, + mbedtls_x509_crt *crt, int depth) +{ + struct tls_config *init_conf = &tls_ctx_global.init_conf; + if (init_conf->event_cb == NULL) + return; + + struct wpabuf *certbuf = NULL; + union tls_event_data ev; + os_memset(&ev, 0, sizeof(ev)); + + #ifdef MBEDTLS_SHA256_C + u8 hash[SHA256_DIGEST_LENGTH]; + const u8 *addr[] = { (u8 *)crt->raw.p }; + if (sha256_vector(1, addr, &crt->raw.len, hash) == 0) { + ev.peer_cert.hash = hash; + ev.peer_cert.hash_len = sizeof(hash); + } + #endif + ev.peer_cert.depth = depth; + char subject[MBEDTLS_X509_MAX_DN_NAME_SIZE*2]; + if (depth == 0) + ev.peer_cert.subject = conn->peer_subject; + if (ev.peer_cert.subject == NULL) { + ev.peer_cert.subject = subject; + if (mbedtls_x509_dn_gets(subject, sizeof(subject), &crt->subject) < 0) + subject[0] = '\0'; + } + + char serial_num[128+1]; + ev.peer_cert.serial_num = + tls_mbedtls_peer_serial_num(crt, serial_num, sizeof(serial_num)); + + const mbedtls_x509_sequence *cur; + + cur = NULL; + if (mbedtls_x509_crt_has_ext_type(crt, MBEDTLS_X509_EXT_SUBJECT_ALT_NAME)) + cur = &crt->subject_alt_names; + for (; cur != NULL; cur = cur->next) { + const unsigned char san_type = (unsigned char)cur->buf.tag + & MBEDTLS_ASN1_TAG_VALUE_MASK; + size_t prelen = 4; + const char *pre; + switch (san_type) { + case MBEDTLS_X509_SAN_RFC822_NAME: prelen = 6; pre = "EMAIL:";break; + case MBEDTLS_X509_SAN_DNS_NAME: pre = "DNS:"; break; + case MBEDTLS_X509_SAN_UNIFORM_RESOURCE_IDENTIFIER: pre = "URI:"; break; + default: continue; + } + + char *pos = os_malloc(prelen + cur->buf.len + 1); + if (pos == NULL) + break; + ev.peer_cert.altsubject[ev.peer_cert.num_altsubject] = pos; + os_memcpy(pos, pre, prelen); + /* data should be properly backslash-escaped if needed, + * so code below does not re-escape, but does replace CTLs */ + /*os_memcpy(pos+prelen, cur->buf.p, cur->buf.len);*/ + /*pos[prelen+cur->buf.len] = '\0';*/ + pos += prelen; + for (size_t i = 0; i < cur->buf.len; ++i) { + unsigned char c = cur->buf.p[i]; + *pos++ = (c >= 32 && c != 127) ? c : '?'; + } + *pos = '\0'; + + if (++ev.peer_cert.num_altsubject == TLS_MAX_ALT_SUBJECT) + break; + } + + cur = NULL; + if (mbedtls_x509_crt_has_ext_type(crt, MBEDTLS_X509_EXT_CERTIFICATE_POLICIES)) + cur = &crt->certificate_policies; + for (; cur != NULL; cur = cur->next) { + if (cur->buf.len != 11) /* len of OID_TOD_STRICT or OID_TOD_TOFU */ + continue; + /* TOD-STRICT "1.3.6.1.4.1.40808.1.3.1" */ + /* TOD-TOFU "1.3.6.1.4.1.40808.1.3.2" */ + #define OID_TOD_STRICT "\x2b\x06\x01\x04\x01\x82\xbe\x68\x01\x03\x01" + #define OID_TOD_TOFU "\x2b\x06\x01\x04\x01\x82\xbe\x68\x01\x03\x02" + if (os_memcmp(cur->buf.p, + OID_TOD_STRICT, sizeof(OID_TOD_STRICT)-1) == 0) { + ev.peer_cert.tod = 1; /* TOD-STRICT */ + break; + } + if (os_memcmp(cur->buf.p, + OID_TOD_TOFU, sizeof(OID_TOD_TOFU)-1) == 0) { + ev.peer_cert.tod = 2; /* TOD-TOFU */ + break; + } + } + + struct tls_conf *tls_conf = conn->tls_conf; + if (tls_conf->ca_cert_probe || (tls_conf->flags & TLS_CONN_EXT_CERT_CHECK) + || init_conf->cert_in_cb) { + certbuf = wpabuf_alloc_copy(crt->raw.p, crt->raw.len); + ev.peer_cert.cert = certbuf; + } + + init_conf->event_cb(init_conf->cb_ctx, TLS_PEER_CERTIFICATE, &ev); + + wpabuf_free(certbuf); + char **altsubject; + *(const char ***)&altsubject = ev.peer_cert.altsubject; + for (size_t i = 0; i < ev.peer_cert.num_altsubject; ++i) + os_free(altsubject[i]); +} + + +static int +tls_mbedtls_verify_cb (void *arg, mbedtls_x509_crt *crt, int depth, uint32_t *flags) +{ + /* XXX: N.B. verify code not carefully tested besides hwsim tests + * + * RFE: mbedtls_x509_crt_verify_info() and enhance log trace messages + * RFE: review and add support for additional TLS_CONN_* flags + * not handling OCSP (not available in mbedtls) + * ... */ + + struct tls_connection *conn = (struct tls_connection *)arg; + struct tls_conf *tls_conf = conn->tls_conf; + uint32_t flags_in = *flags; + + if (depth > 8) { /*(depth 8 picked as arbitrary limit)*/ + emsg(MSG_WARNING, "client cert chain too long"); + *flags |= MBEDTLS_X509_BADCERT_OTHER; /* cert chain too long */ + tls_mbedtls_verify_fail_event(crt, depth, + "client cert chain too long", + TLS_FAIL_BAD_CERTIFICATE); + } + else if (tls_conf->verify_depth0_only) { + if (depth > 0) + *flags = 0; + else { + #ifdef MBEDTLS_SHA256_C + u8 hash[SHA256_DIGEST_LENGTH]; + const u8 *addr[] = { (u8 *)crt->raw.p }; + if (sha256_vector(1, addr, &crt->raw.len, hash) < 0 + || os_memcmp(tls_conf->ca_cert_hash, hash, sizeof(hash)) != 0) { + *flags |= MBEDTLS_X509_BADCERT_NOT_TRUSTED; + tls_mbedtls_verify_fail_event(crt, depth, + "cert hash mismatch", + TLS_FAIL_UNTRUSTED); + } + else /* hash matches; ignore other issues *except* if revoked)*/ + *flags &= MBEDTLS_X509_BADCERT_REVOKED; + #endif + } + } + else if (depth == 0) { + if (!conn->peer_subject) + tls_mbedtls_set_peer_subject(conn, crt); + /*(use same labels to tls_mbedtls_verify_fail_event() as used in + * other TLS modules so that hwsim tests find exact string match)*/ + if (!conn->peer_subject) { /* error copying subject string */ + *flags |= MBEDTLS_X509_BADCERT_OTHER; + tls_mbedtls_verify_fail_event(crt, depth, + "internal error", + TLS_FAIL_UNSPECIFIED); + } + /*(use os_strstr() for subject match as is done in tls_mbedtls.c + * to follow the same behavior, even though a suffix match would + * make more sense. Also, note that strstr match does not + * normalize whitespace (between components) for comparison)*/ + else if (tls_conf->subject_match + && os_strstr(conn->peer_subject, + tls_conf->subject_match) == NULL) { + wpa_printf(MSG_WARNING, + "MTLS: Subject '%s' did not match with '%s'", + conn->peer_subject, tls_conf->subject_match); + *flags |= MBEDTLS_X509_BADCERT_CN_MISMATCH; + tls_mbedtls_verify_fail_event(crt, depth, + "Subject mismatch", + TLS_FAIL_SUBJECT_MISMATCH); + } + if (tls_conf->altsubject_match + && !tls_mbedtls_match_altsubject(crt, tls_conf->altsubject_match)) { + wpa_printf(MSG_WARNING, + "MTLS: altSubjectName match '%s' not found", + tls_conf->altsubject_match); + *flags |= MBEDTLS_X509_BADCERT_CN_MISMATCH; + tls_mbedtls_verify_fail_event(crt, depth, + "AltSubject mismatch", + TLS_FAIL_ALTSUBJECT_MISMATCH); + } + if (tls_conf->suffix_match + && !tls_mbedtls_match_suffixes(crt, tls_conf->suffix_match, 0)) { + wpa_printf(MSG_WARNING, + "MTLS: Domain suffix match '%s' not found", + tls_conf->suffix_match); + *flags |= MBEDTLS_X509_BADCERT_CN_MISMATCH; + tls_mbedtls_verify_fail_event(crt, depth, + "Domain suffix mismatch", + TLS_FAIL_DOMAIN_SUFFIX_MISMATCH); + } + if (tls_conf->domain_match + && !tls_mbedtls_match_suffixes(crt, tls_conf->domain_match, 1)) { + wpa_printf(MSG_WARNING, + "MTLS: Domain match '%s' not found", + tls_conf->domain_match); + *flags |= MBEDTLS_X509_BADCERT_CN_MISMATCH; + tls_mbedtls_verify_fail_event(crt, depth, + "Domain mismatch", + TLS_FAIL_DOMAIN_MISMATCH); + } + if (tls_conf->check_cert_subject + && !tls_mbedtls_match_dn_field(crt, tls_conf->check_cert_subject)) { + *flags |= MBEDTLS_X509_BADCERT_CN_MISMATCH; + tls_mbedtls_verify_fail_event(crt, depth, + "Distinguished Name", + TLS_FAIL_DN_MISMATCH); + } + if (tls_conf->flags & TLS_CONN_SUITEB) { + /* check RSA modulus size (public key bitlen) */ + const mbedtls_pk_type_t pk_alg = mbedtls_pk_get_type(&crt->pk); + if ((pk_alg == MBEDTLS_PK_RSA || pk_alg == MBEDTLS_PK_RSASSA_PSS) + && mbedtls_pk_get_bitlen(&crt->pk) < 3072) { + /* hwsim suite_b RSA tests expect 3072 + * suite_b_192_rsa_ecdhe_radius_rsa2048_client + * suite_b_192_rsa_dhe_radius_rsa2048_client */ + *flags |= MBEDTLS_X509_BADCERT_BAD_KEY; + tls_mbedtls_verify_fail_event(crt, depth, + "Insufficient RSA modulus size", + TLS_FAIL_INSUFFICIENT_KEY_LEN); + } + } + if (tls_conf->check_crl && tls_conf->crl == NULL) { + /* see tests/hwsim test_ap_eap.py ap_wpa2_eap_tls_check_crl */ + emsg(MSG_WARNING, "check_crl set but no CRL loaded; reject all?"); + *flags |= MBEDTLS_X509_BADCERT_OTHER; + tls_mbedtls_verify_fail_event(crt, depth, + "check_crl set but no CRL loaded; " + "reject all?", + TLS_FAIL_BAD_CERTIFICATE); + } + } + else { + if (tls_conf->check_crl != 2) /* 2 == verify CRLs for all certs */ + *flags &= ~MBEDTLS_X509_BADCERT_REVOKED; + } + + if (!tls_conf->check_crl_strict) { + *flags &= ~MBEDTLS_X509_BADCRL_EXPIRED; + *flags &= ~MBEDTLS_X509_BADCRL_FUTURE; + } + + if (tls_conf->flags & TLS_CONN_DISABLE_TIME_CHECKS) { + *flags &= ~MBEDTLS_X509_BADCERT_EXPIRED; + *flags &= ~MBEDTLS_X509_BADCERT_FUTURE; + } + + tls_mbedtls_verify_cert_event(conn, crt, depth); + + if (*flags) { + if (*flags & (MBEDTLS_X509_BADCERT_NOT_TRUSTED + |MBEDTLS_X509_BADCERT_CN_MISMATCH + |MBEDTLS_X509_BADCERT_REVOKED)) { + emsg(MSG_WARNING, "client cert not trusted"); + } + /* report event if flags set but no additional flags set above */ + /* (could translate flags to more detailed TLS_FAIL_* if needed) */ + if (!(*flags & ~flags_in)) { + enum tls_fail_reason reason = TLS_FAIL_UNSPECIFIED; + const char *errmsg = "cert verify fail unspecified"; + if (*flags & MBEDTLS_X509_BADCERT_NOT_TRUSTED) { + reason = TLS_FAIL_UNTRUSTED; + errmsg = "certificate not trusted"; + } + if (*flags & MBEDTLS_X509_BADCERT_REVOKED) { + reason = TLS_FAIL_REVOKED; + errmsg = "certificate has been revoked"; + } + if (*flags & MBEDTLS_X509_BADCERT_FUTURE) { + reason = TLS_FAIL_NOT_YET_VALID; + errmsg = "certificate not yet valid"; + } + if (*flags & MBEDTLS_X509_BADCERT_EXPIRED) { + reason = TLS_FAIL_EXPIRED; + errmsg = "certificate has expired"; + } + if (*flags & MBEDTLS_X509_BADCERT_BAD_MD) { + reason = TLS_FAIL_BAD_CERTIFICATE; + errmsg = "certificate uses insecure algorithm"; + } + tls_mbedtls_verify_fail_event(crt, depth, errmsg, reason); + } + #if 0 + /* ??? send (again) cert events for all certs in chain ??? + * (should already have been called for greater depths) */ + /* tls_openssl.c:tls_verify_cb() sends cert events for all certs + * in chain if certificate validation fails, but sends all events + * with depth set to 0 (might be a bug) */ + if (depth > 0) { + int pdepth = depth + 1; + for (mbedtls_x509_crt *pcrt; (pcrt = crt->next); ++pdepth) { + tls_mbedtls_verify_cert_event(conn, pcrt, pdepth); + } + } + #endif + /*(do not preserve subject if verification failed but was optional)*/ + if (depth == 0 && conn->peer_subject) { + os_free(conn->peer_subject); + conn->peer_subject = NULL; + } + } + else if (depth == 0) { + struct tls_config *init_conf = &tls_ctx_global.init_conf; + if (tls_conf->ca_cert_probe) { + /* reject server certificate on probe-only run */ + *flags |= MBEDTLS_X509_BADCERT_OTHER; + tls_mbedtls_verify_fail_event(crt, depth, + "server chain probe", + TLS_FAIL_SERVER_CHAIN_PROBE); + } + else if (init_conf->event_cb) { + /* ??? send event as soon as depth == 0 is verified ??? + * What about rest of chain? + * Follows tls_mbedtls.c behavior: */ + init_conf->event_cb(init_conf->cb_ctx, + TLS_CERT_CHAIN_SUCCESS, NULL); + } + } + + return 0; +} --- /dev/null +++ b/tests/build/build-wpa_supplicant-mbedtls.config @@ -0,0 +1,24 @@ +CONFIG_TLS=mbedtls + +CONFIG_WPS=y +CONFIG_EAP_TLS=y +CONFIG_EAP_MSCHAPV2=y + +CONFIG_EAP_PSK=y +CONFIG_EAP_GPSK=y +CONFIG_EAP_AKA=y +CONFIG_EAP_SIM=y +CONFIG_EAP_SAKE=y +CONFIG_EAP_PAX=y +CONFIG_EAP_FAST=y +CONFIG_EAP_IKEV2=y + +CONFIG_SAE=y +CONFIG_FILS=y +CONFIG_FILS_SK_PFS=y +CONFIG_OWE=y +CONFIG_DPP=y +CONFIG_SUITEB=y +CONFIG_SUITEB192=y + +CFLAGS += -Werror --- a/tests/hwsim/example-hostapd.config +++ b/tests/hwsim/example-hostapd.config @@ -4,6 +4,7 @@ CONFIG_DRIVER_NONE=y CONFIG_DRIVER_NL80211=y CONFIG_RSN_PREAUTH=y +#CONFIG_TLS=mbedtls #CONFIG_TLS=internal #CONFIG_INTERNAL_LIBTOMMATH=y #CONFIG_INTERNAL_LIBTOMMATH_FAST=y @@ -39,6 +40,9 @@ endif ifeq ($(CONFIG_TLS), wolfssl) CONFIG_EAP_PWD=y endif +ifeq ($(CONFIG_TLS), mbedtls) +CONFIG_EAP_PWD=y +endif CONFIG_EAP_EKE=y CONFIG_PKCS12=y CONFIG_RADIUS_SERVER=y --- a/tests/hwsim/example-wpa_supplicant.config +++ b/tests/hwsim/example-wpa_supplicant.config @@ -2,6 +2,7 @@ CONFIG_TLS=openssl #CONFIG_TLS=wolfssl +#CONFIG_TLS=mbedtls #CONFIG_TLS=internal #CONFIG_INTERNAL_LIBTOMMATH=y #CONFIG_INTERNAL_LIBTOMMATH_FAST=y @@ -41,6 +42,9 @@ endif ifeq ($(CONFIG_TLS), wolfssl) CONFIG_EAP_PWD=y endif +ifeq ($(CONFIG_TLS), mbedtls) +CONFIG_EAP_PWD=y +endif CONFIG_USIM_SIMULATOR=y CONFIG_SIM_SIMULATOR=y --- a/wpa_supplicant/Makefile +++ b/wpa_supplicant/Makefile @@ -1229,6 +1229,29 @@ endif CFLAGS += -DTLS_DEFAULT_CIPHERS=\"$(CONFIG_TLS_DEFAULT_CIPHERS)\" endif +ifeq ($(CONFIG_TLS), mbedtls) +ifndef CONFIG_CRYPTO +CONFIG_CRYPTO=mbedtls +endif +ifdef TLS_FUNCS +OBJS += ../src/crypto/tls_mbedtls.o +LIBS += -lmbedtls -lmbedx509 +endif +OBJS += ../src/crypto/crypto_$(CONFIG_CRYPTO).o +OBJS_p += ../src/crypto/crypto_$(CONFIG_CRYPTO).o +OBJS_priv += ../src/crypto/crypto_$(CONFIG_CRYPTO).o +ifdef NEED_FIPS186_2_PRF +OBJS += ../src/crypto/fips_prf_internal.o +SHA1OBJS += ../src/crypto/sha1-internal.o +endif +ifeq ($(CONFIG_CRYPTO), mbedtls) +LIBS += -lmbedcrypto +LIBS_p += -lmbedcrypto +# XXX: create a config option? +CFLAGS += -DCRYPTO_RSA_OAEP_SHA256 +endif +endif + ifeq ($(CONFIG_TLS), gnutls) ifndef CONFIG_CRYPTO # default to libgcrypt @@ -1421,9 +1444,11 @@ endif ifneq ($(CONFIG_TLS), openssl) ifneq ($(CONFIG_TLS), wolfssl) +ifneq ($(CONFIG_TLS), mbedtls) NEED_INTERNAL_AES_WRAP=y endif endif +endif ifdef CONFIG_OPENSSL_INTERNAL_AES_WRAP # Seems to be needed at least with BoringSSL NEED_INTERNAL_AES_WRAP=y @@ -1437,9 +1462,11 @@ endif ifdef NEED_INTERNAL_AES_WRAP ifneq ($(CONFIG_TLS), linux) +ifneq ($(CONFIG_TLS), mbedtls) AESOBJS += ../src/crypto/aes-unwrap.o endif endif +endif ifdef NEED_AES_EAX AESOBJS += ../src/crypto/aes-eax.o NEED_AES_CTR=y @@ -1449,35 +1476,45 @@ AESOBJS += ../src/crypto/aes-siv.o NEED_AES_CTR=y endif ifdef NEED_AES_CTR +ifneq ($(CONFIG_TLS), mbedtls) AESOBJS += ../src/crypto/aes-ctr.o endif +endif ifdef NEED_AES_ENCBLOCK +ifneq ($(CONFIG_TLS), mbedtls) AESOBJS += ../src/crypto/aes-encblock.o endif +endif NEED_AES_ENC=y ifneq ($(CONFIG_TLS), openssl) ifneq ($(CONFIG_TLS), linux) ifneq ($(CONFIG_TLS), wolfssl) +ifneq ($(CONFIG_TLS), mbedtls) AESOBJS += ../src/crypto/aes-omac1.o endif endif endif +endif ifdef NEED_AES_WRAP NEED_AES_ENC=y ifdef NEED_INTERNAL_AES_WRAP +ifneq ($(CONFIG_TLS), mbedtls) AESOBJS += ../src/crypto/aes-wrap.o endif endif +endif ifdef NEED_AES_CBC NEED_AES_ENC=y ifneq ($(CONFIG_TLS), openssl) ifneq ($(CONFIG_TLS), linux) ifneq ($(CONFIG_TLS), wolfssl) +ifneq ($(CONFIG_TLS), mbedtls) AESOBJS += ../src/crypto/aes-cbc.o endif endif endif endif +endif ifdef NEED_AES_ENC ifdef CONFIG_INTERNAL_AES AESOBJS += ../src/crypto/aes-internal-enc.o @@ -1492,12 +1529,16 @@ ifneq ($(CONFIG_TLS), openssl) ifneq ($(CONFIG_TLS), linux) ifneq ($(CONFIG_TLS), gnutls) ifneq ($(CONFIG_TLS), wolfssl) +ifneq ($(CONFIG_TLS), mbedtls) SHA1OBJS += ../src/crypto/sha1.o endif endif endif endif +endif +ifneq ($(CONFIG_TLS), mbedtls) SHA1OBJS += ../src/crypto/sha1-prf.o +endif ifdef CONFIG_INTERNAL_SHA1 SHA1OBJS += ../src/crypto/sha1-internal.o ifdef NEED_FIPS186_2_PRF @@ -1509,29 +1550,37 @@ CFLAGS += -DCONFIG_NO_PBKDF2 else ifneq ($(CONFIG_TLS), openssl) ifneq ($(CONFIG_TLS), wolfssl) +ifneq ($(CONFIG_TLS), mbedtls) SHA1OBJS += ../src/crypto/sha1-pbkdf2.o endif endif endif +endif ifdef NEED_T_PRF +ifneq ($(CONFIG_TLS), mbedtls) SHA1OBJS += ../src/crypto/sha1-tprf.o endif +endif ifdef NEED_TLS_PRF +ifneq ($(CONFIG_TLS), mbedtls) SHA1OBJS += ../src/crypto/sha1-tlsprf.o endif endif +endif ifndef CONFIG_FIPS ifneq ($(CONFIG_TLS), openssl) ifneq ($(CONFIG_TLS), linux) ifneq ($(CONFIG_TLS), gnutls) ifneq ($(CONFIG_TLS), wolfssl) +ifneq ($(CONFIG_TLS), mbedtls) MD5OBJS += ../src/crypto/md5.o endif endif endif endif endif +endif ifdef NEED_MD5 ifdef CONFIG_INTERNAL_MD5 MD5OBJS += ../src/crypto/md5-internal.o @@ -1586,12 +1635,17 @@ ifneq ($(CONFIG_TLS), openssl) ifneq ($(CONFIG_TLS), linux) ifneq ($(CONFIG_TLS), gnutls) ifneq ($(CONFIG_TLS), wolfssl) +ifneq ($(CONFIG_TLS), mbedtls) SHA256OBJS += ../src/crypto/sha256.o endif endif endif endif +endif + +ifneq ($(CONFIG_TLS), mbedtls) SHA256OBJS += ../src/crypto/sha256-prf.o +endif ifdef CONFIG_INTERNAL_SHA256 SHA256OBJS += ../src/crypto/sha256-internal.o endif @@ -1604,50 +1658,68 @@ CFLAGS += -DCONFIG_INTERNAL_SHA512 SHA256OBJS += ../src/crypto/sha512-internal.o endif ifdef NEED_TLS_PRF_SHA256 +ifneq ($(CONFIG_TLS), mbedtls) SHA256OBJS += ../src/crypto/sha256-tlsprf.o endif +endif ifdef NEED_TLS_PRF_SHA384 +ifneq ($(CONFIG_TLS), mbedtls) SHA256OBJS += ../src/crypto/sha384-tlsprf.o endif +endif ifdef NEED_HMAC_SHA256_KDF CFLAGS += -DCONFIG_HMAC_SHA256_KDF +ifneq ($(CONFIG_TLS), mbedtls) OBJS += ../src/crypto/sha256-kdf.o endif +endif ifdef NEED_HMAC_SHA384_KDF CFLAGS += -DCONFIG_HMAC_SHA384_KDF +ifneq ($(CONFIG_TLS), mbedtls) OBJS += ../src/crypto/sha384-kdf.o endif +endif ifdef NEED_HMAC_SHA512_KDF CFLAGS += -DCONFIG_HMAC_SHA512_KDF +ifneq ($(CONFIG_TLS), mbedtls) OBJS += ../src/crypto/sha512-kdf.o endif +endif OBJS += $(SHA256OBJS) ifdef NEED_SHA384 ifneq ($(CONFIG_TLS), openssl) ifneq ($(CONFIG_TLS), linux) ifneq ($(CONFIG_TLS), gnutls) ifneq ($(CONFIG_TLS), wolfssl) +ifneq ($(CONFIG_TLS), mbedtls) OBJS += ../src/crypto/sha384.o endif endif endif endif +endif CFLAGS += -DCONFIG_SHA384 +ifneq ($(CONFIG_TLS), mbedtls) OBJS += ../src/crypto/sha384-prf.o endif +endif ifdef NEED_SHA512 ifneq ($(CONFIG_TLS), openssl) ifneq ($(CONFIG_TLS), linux) ifneq ($(CONFIG_TLS), gnutls) ifneq ($(CONFIG_TLS), wolfssl) +ifneq ($(CONFIG_TLS), mbedtls) OBJS += ../src/crypto/sha512.o endif endif endif endif +endif CFLAGS += -DCONFIG_SHA512 +ifneq ($(CONFIG_TLS), mbedtls) OBJS += ../src/crypto/sha512-prf.o endif +endif ifdef NEED_ASN1 OBJS += ../src/tls/asn1.o @@ -1822,10 +1894,12 @@ ifdef CONFIG_FIPS CFLAGS += -DCONFIG_FIPS ifneq ($(CONFIG_TLS), openssl) ifneq ($(CONFIG_TLS), wolfssl) +ifneq ($(CONFIG_TLS), mbedtls) $(error CONFIG_FIPS=y requires CONFIG_TLS=openssl) endif endif endif +endif OBJS += $(SHA1OBJS) $(DESOBJS) --- a/wpa_supplicant/defconfig +++ b/wpa_supplicant/defconfig @@ -10,8 +10,8 @@ # to override previous values of the variables. -# Uncomment following two lines and fix the paths if you have installed OpenSSL -# or GnuTLS in non-default location +# Uncomment following two lines and fix the paths if you have installed TLS +# libraries in a non-default location #CFLAGS += -I/usr/local/openssl/include #LIBS += -L/usr/local/openssl/lib @@ -20,6 +20,7 @@ # used to fix build issues on such systems (krb5.h not found). #CFLAGS += -I/usr/include/kerberos + # Driver interface for generic Linux wireless extensions # Note: WEXT is deprecated in the current Linux kernel version and no new # functionality is added to it. nl80211-based interface is the new @@ -329,6 +330,7 @@ CONFIG_BACKEND=file # openssl = OpenSSL (default) # gnutls = GnuTLS # internal = Internal TLSv1 implementation (experimental) +# mbedtls = mbed TLS # linux = Linux kernel AF_ALG and internal TLSv1 implementation (experimental) # none = Empty template #CONFIG_TLS=openssl