From 545819df2bad7da07df15ad8c1db947d9877cd19 Mon Sep 17 00:00:00 2001 From: HuangHaitao Date: Mon, 6 Jan 2025 15:18:12 +0800 Subject: [PATCH] Fix CVE-2024-45159, CVE-2024-45158 Signed-off-by: HuangHaitao --- ChangeLog.d/MBEDTLS_PSA_HMAC_DRBG_MD_TYPE.txt | 4 + .../fix_reporting_of_key_usage_issues.txt | 11 + ...sa_rsa_load_representation-memory_leak.txt | 3 + ChangeLog.d/tls13-cert-regressions.txt | 18 + include/mbedtls/mbedtls_config.h | 17 +- library/psa_crypto_random_impl.h | 17 +- library/psa_crypto_rsa.c | 17 +- library/ssl_misc.h | 45 +- library/ssl_tls.c | 554 +++++++++--------- library/ssl_tls12_server.c | 4 +- library/ssl_tls13_generic.c | 143 +---- programs/ssl/ssl_client2.c | 10 +- programs/ssl/ssl_server2.c | 3 +- 13 files changed, 404 insertions(+), 442 deletions(-) create mode 100644 ChangeLog.d/MBEDTLS_PSA_HMAC_DRBG_MD_TYPE.txt create mode 100644 ChangeLog.d/fix_reporting_of_key_usage_issues.txt create mode 100644 ChangeLog.d/mbedtls_psa_rsa_load_representation-memory_leak.txt create mode 100644 ChangeLog.d/tls13-cert-regressions.txt diff --git a/ChangeLog.d/MBEDTLS_PSA_HMAC_DRBG_MD_TYPE.txt b/ChangeLog.d/MBEDTLS_PSA_HMAC_DRBG_MD_TYPE.txt new file mode 100644 index 000000000..079cd741d --- /dev/null +++ b/ChangeLog.d/MBEDTLS_PSA_HMAC_DRBG_MD_TYPE.txt @@ -0,0 +1,4 @@ +Security + * Unlike previously documented, enabling MBEDTLS_PSA_HMAC_DRBG_MD_TYPE does + not cause the PSA subsystem to use HMAC_DRBG: it uses HMAC_DRBG only when + MBEDTLS_PSA_CRYPTO_EXTERNAL_RNG and MBEDTLS_CTR_DRBG_C are disabled. diff --git a/ChangeLog.d/fix_reporting_of_key_usage_issues.txt b/ChangeLog.d/fix_reporting_of_key_usage_issues.txt new file mode 100644 index 000000000..b81fb426a --- /dev/null +++ b/ChangeLog.d/fix_reporting_of_key_usage_issues.txt @@ -0,0 +1,11 @@ +Security + * With TLS 1.3, when a server enables optional authentication of the + client, if the client-provided certificate does not have appropriate values + in keyUsage or extKeyUsage extensions, then the return value of + mbedtls_ssl_get_verify_result() would incorrectly have the + MBEDTLS_X509_BADCERT_KEY_USAGE and MBEDTLS_X509_BADCERT_EXT_KEY_USAGE bits + clear. As a result, an attacker that had a certificate valid for uses other + than TLS client authentication could be able to use it for TLS client + authentication anyway. Only TLS 1.3 servers were affected, and only with + optional authentication (required would abort the handshake with a fatal + alert). diff --git a/ChangeLog.d/mbedtls_psa_rsa_load_representation-memory_leak.txt b/ChangeLog.d/mbedtls_psa_rsa_load_representation-memory_leak.txt new file mode 100644 index 000000000..dba25af61 --- /dev/null +++ b/ChangeLog.d/mbedtls_psa_rsa_load_representation-memory_leak.txt @@ -0,0 +1,3 @@ +Bugfix + * Fix a memory leak that could occur when failing to process an RSA + key through some PSA functions due to low memory conditions. diff --git a/ChangeLog.d/tls13-cert-regressions.txt b/ChangeLog.d/tls13-cert-regressions.txt new file mode 100644 index 000000000..8dd8a327d --- /dev/null +++ b/ChangeLog.d/tls13-cert-regressions.txt @@ -0,0 +1,18 @@ +Bugfix + * Fixed a regression introduced in 3.6.0 where the CA callback set with + mbedtls_ssl_conf_ca_cb() would stop working when connections were + upgraded to TLS 1.3. Fixed by adding support for the CA callback with TLS + 1.3. + * Fixed a regression introduced in 3.6.0 where clients that relied on + optional/none authentication mode, by calling mbedtls_ssl_conf_authmode() + with MBEDTLS_SSL_VERIFY_OPTIONAL or MBEDTLS_SSL_VERIFY_NONE, would stop + working when connections were upgraded to TLS 1.3. Fixed by adding + support for optional/none with TLS 1.3 as well. Note that the TLS 1.3 + standard makes server authentication mandatory; users are advised not to + use authmode none, and to carefully check the results when using optional + mode. + * Fixed a regression introduced in 3.6.0 where context-specific certificate + verify callbacks, set with mbedtls_ssl_set_verify() as opposed to + mbedtls_ssl_conf_verify(), would stop working when connections were + upgraded to TLS 1.3. Fixed by adding support for context-specific verify + callback in TLS 1.3. diff --git a/include/mbedtls/mbedtls_config.h b/include/mbedtls/mbedtls_config.h index 727dd64ae..458bb7ffd 100644 --- a/include/mbedtls/mbedtls_config.h +++ b/include/mbedtls/mbedtls_config.h @@ -3996,11 +3996,18 @@ * Use HMAC_DRBG with the specified hash algorithm for HMAC_DRBG for the * PSA crypto subsystem. * - * If this option is unset: - * - If CTR_DRBG is available, the PSA subsystem uses it rather than HMAC_DRBG. - * - Otherwise, the PSA subsystem uses HMAC_DRBG with either - * #MBEDTLS_MD_SHA512 or #MBEDTLS_MD_SHA256 based on availability and - * on unspecified heuristics. + * If this option is unset, the library chooses a hash (currently between + * #MBEDTLS_MD_SHA512 and #MBEDTLS_MD_SHA256) based on availability and + * unspecified heuristics. + * + * \note The PSA crypto subsystem uses the first available mechanism amongst + * the following: + * - #MBEDTLS_PSA_CRYPTO_EXTERNAL_RNG if enabled; + * - Entropy from #MBEDTLS_ENTROPY_C plus CTR_DRBG with AES + * if #MBEDTLS_CTR_DRBG_C is enabled; + * - Entropy from #MBEDTLS_ENTROPY_C plus HMAC_DRBG. + * + * A future version may reevaluate the prioritization of DRBG mechanisms. */ //#define MBEDTLS_PSA_HMAC_DRBG_MD_TYPE MBEDTLS_MD_SHA256 diff --git a/library/psa_crypto_random_impl.h b/library/psa_crypto_random_impl.h index 533fb2e94..5b5163111 100644 --- a/library/psa_crypto_random_impl.h +++ b/library/psa_crypto_random_impl.h @@ -21,13 +21,10 @@ typedef mbedtls_psa_external_random_context_t mbedtls_psa_random_context_t; #include "mbedtls/entropy.h" /* Choose a DRBG based on configuration and availability */ -#if defined(MBEDTLS_PSA_HMAC_DRBG_MD_TYPE) - -#include "mbedtls/hmac_drbg.h" - -#elif defined(MBEDTLS_CTR_DRBG_C) +#if defined(MBEDTLS_CTR_DRBG_C) #include "mbedtls/ctr_drbg.h" +#undef MBEDTLS_PSA_HMAC_DRBG_MD_TYPE #elif defined(MBEDTLS_HMAC_DRBG_C) @@ -49,17 +46,11 @@ typedef mbedtls_psa_external_random_context_t mbedtls_psa_random_context_t; #error "No hash algorithm available for HMAC_DBRG." #endif -#else /* !MBEDTLS_PSA_HMAC_DRBG_MD_TYPE && !MBEDTLS_CTR_DRBG_C && !MBEDTLS_HMAC_DRBG_C*/ +#else /* !MBEDTLS_CTR_DRBG_C && !MBEDTLS_HMAC_DRBG_C*/ #error "No DRBG module available for the psa_crypto module." -#endif /* !MBEDTLS_PSA_HMAC_DRBG_MD_TYPE && !MBEDTLS_CTR_DRBG_C && !MBEDTLS_HMAC_DRBG_C*/ - -#if defined(MBEDTLS_CTR_DRBG_C) -#include "mbedtls/ctr_drbg.h" -#elif defined(MBEDTLS_HMAC_DRBG_C) -#include "mbedtls/hmac_drbg.h" -#endif /* !MBEDTLS_CTR_DRBG_C && !MBEDTLS_HMAC_DRBG_C */ +#endif /* !MBEDTLS_CTR_DRBG_C && !MBEDTLS_HMAC_DRBG_C*/ /* The maximum number of bytes that mbedtls_psa_get_random() is expected to return. */ #if defined(MBEDTLS_CTR_DRBG_C) diff --git a/library/psa_crypto_rsa.c b/library/psa_crypto_rsa.c index 7dce9aac4..1318aeb4a 100644 --- a/library/psa_crypto_rsa.c +++ b/library/psa_crypto_rsa.c @@ -197,16 +197,14 @@ psa_status_t mbedtls_psa_rsa_export_public_key( status = mbedtls_psa_rsa_load_representation( attributes->type, key_buffer, key_buffer_size, &rsa); - if (status != PSA_SUCCESS) { - return status; + if (status == PSA_SUCCESS) { + status = mbedtls_psa_rsa_export_key(PSA_KEY_TYPE_RSA_PUBLIC_KEY, + rsa, + data, + data_size, + data_length); } - status = mbedtls_psa_rsa_export_key(PSA_KEY_TYPE_RSA_PUBLIC_KEY, - rsa, - data, - data_size, - data_length); - mbedtls_rsa_free(rsa); mbedtls_free(rsa); @@ -264,6 +262,7 @@ psa_status_t mbedtls_psa_rsa_generate_key( (unsigned int) attributes->bits, exponent); if (ret != 0) { + mbedtls_rsa_free(&rsa); return mbedtls_to_psa_error(ret); } @@ -330,7 +329,7 @@ psa_status_t mbedtls_psa_rsa_sign_hash( key_buffer_size, &rsa); if (status != PSA_SUCCESS) { - return status; + goto exit; } status = psa_rsa_decode_md_type(alg, hash_length, &md_alg); diff --git a/library/ssl_misc.h b/library/ssl_misc.h index cfacb1da5..764e14406 100644 --- a/library/ssl_misc.h +++ b/library/ssl_misc.h @@ -1677,18 +1677,53 @@ static inline mbedtls_x509_crt *mbedtls_ssl_own_cert(mbedtls_ssl_context *ssl) } /* - * Check usage of a certificate wrt extensions: - * keyUsage, extendedKeyUsage (later), and nSCertType (later). + * Verify a certificate. + * + * [in/out] ssl: misc. things read + * ssl->session_negotiate->verify_result updated + * [in] authmode: one of MBEDTLS_SSL_VERIFY_{NONE,OPTIONAL,REQUIRED} + * [in] chain: the certificate chain to verify (ie the peer's chain) + * [in] ciphersuite_info: For TLS 1.2, this session's ciphersuite; + * for TLS 1.3, may be left NULL. + * [in] rs_ctx: restart context if restartable ECC is in use; + * leave NULL for no restartable behaviour. + * + * Return: + * - 0 if the handshake should continue. Depending on the + * authmode it means: + * - REQUIRED: the certificate was found to be valid, trusted & acceptable. + * ssl->session_negotiate->verify_result is 0. + * - OPTIONAL: the certificate may or may not be acceptable, but + * ssl->session_negotiate->verify_result was updated with the result. + * - NONE: the certificate wasn't even checked. + * - MBEDTLS_ERR_X509_CERT_VERIFY_FAILED or MBEDTLS_ERR_SSL_BAD_CERTIFICATE if + * the certificate was found to be invalid/untrusted/unacceptable and the + * handshake should be aborted (can only happen with REQUIRED). + * - another error code if another error happened (out-of-memory, etc.) + */ +MBEDTLS_CHECK_RETURN_CRITICAL +int mbedtls_ssl_verify_certificate(mbedtls_ssl_context *ssl, + int authmode, + mbedtls_x509_crt *chain, + const mbedtls_ssl_ciphersuite_t *ciphersuite_info, + void *rs_ctx); + +/* + * Check usage of a certificate wrt usage extensions: + * keyUsage and extendedKeyUsage. + * (Note: nSCertType is deprecated and not standard, we don't check it.) + * + * Note: if tls_version is 1.3, ciphersuite is ignored and can be NULL. * - * Warning: cert_endpoint is the endpoint of the cert (ie, of our peer when we - * check a cert we received from them)! + * Note: recv_endpoint is the receiver's endpoint. * * Return 0 if everything is OK, -1 if not. */ MBEDTLS_CHECK_RETURN_CRITICAL int mbedtls_ssl_check_cert_usage(const mbedtls_x509_crt *cert, const mbedtls_ssl_ciphersuite_t *ciphersuite, - int cert_endpoint, + int recv_endpoint, + mbedtls_ssl_protocol_version tls_version, uint32_t *flags); #endif /* MBEDTLS_X509_CRT_PARSE_C */ diff --git a/library/ssl_tls.c b/library/ssl_tls.c index c5e06491c..639c23be1 100644 --- a/library/ssl_tls.c +++ b/library/ssl_tls.c @@ -1354,29 +1354,6 @@ static int ssl_conf_check(const mbedtls_ssl_context *ssl) return ret; } -#if defined(MBEDTLS_SSL_PROTO_TLS1_3) - /* RFC 8446 section 4.4.3 - * - * If the verification fails, the receiver MUST terminate the handshake with - * a "decrypt_error" alert. - * - * If the client is configured as TLS 1.3 only with optional verify, return - * bad config. - * - */ - if (mbedtls_ssl_conf_tls13_is_ephemeral_enabled( - (mbedtls_ssl_context *) ssl) && - ssl->conf->endpoint == MBEDTLS_SSL_IS_CLIENT && - ssl->conf->max_tls_version == MBEDTLS_SSL_VERSION_TLS1_3 && - ssl->conf->min_tls_version == MBEDTLS_SSL_VERSION_TLS1_3 && - ssl->conf->authmode == MBEDTLS_SSL_VERIFY_OPTIONAL) { - MBEDTLS_SSL_DEBUG_MSG( - 1, ("Optional verify auth mode " - "is not available for TLS 1.3 client")); - return MBEDTLS_ERR_SSL_BAD_CONFIG; - } -#endif /* MBEDTLS_SSL_PROTO_TLS1_3 */ - if (ssl->conf->f_rng == NULL) { MBEDTLS_SSL_DEBUG_MSG(1, ("no RNG provided")); return MBEDTLS_ERR_SSL_NO_RNG; @@ -6344,71 +6321,6 @@ const char *mbedtls_ssl_get_curve_name_from_tls_id(uint16_t tls_id) } #endif -#if defined(MBEDTLS_X509_CRT_PARSE_C) -int mbedtls_ssl_check_cert_usage(const mbedtls_x509_crt *cert, - const mbedtls_ssl_ciphersuite_t *ciphersuite, - int cert_endpoint, - uint32_t *flags) -{ - int ret = 0; - unsigned int usage = 0; - const char *ext_oid; - size_t ext_len; - - if (cert_endpoint == MBEDTLS_SSL_IS_SERVER) { - /* Server part of the key exchange */ - switch (ciphersuite->key_exchange) { - case MBEDTLS_KEY_EXCHANGE_RSA: - case MBEDTLS_KEY_EXCHANGE_RSA_PSK: - usage = MBEDTLS_X509_KU_KEY_ENCIPHERMENT; - break; - - case MBEDTLS_KEY_EXCHANGE_DHE_RSA: - case MBEDTLS_KEY_EXCHANGE_ECDHE_RSA: - case MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA: - usage = MBEDTLS_X509_KU_DIGITAL_SIGNATURE; - break; - - case MBEDTLS_KEY_EXCHANGE_ECDH_RSA: - case MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA: - usage = MBEDTLS_X509_KU_KEY_AGREEMENT; - break; - - /* Don't use default: we want warnings when adding new values */ - case MBEDTLS_KEY_EXCHANGE_NONE: - case MBEDTLS_KEY_EXCHANGE_PSK: - case MBEDTLS_KEY_EXCHANGE_DHE_PSK: - case MBEDTLS_KEY_EXCHANGE_ECDHE_PSK: - case MBEDTLS_KEY_EXCHANGE_ECJPAKE: - usage = 0; - } - } else { - /* Client auth: we only implement rsa_sign and mbedtls_ecdsa_sign for now */ - usage = MBEDTLS_X509_KU_DIGITAL_SIGNATURE; - } - - if (mbedtls_x509_crt_check_key_usage(cert, usage) != 0) { - *flags |= MBEDTLS_X509_BADCERT_KEY_USAGE; - ret = -1; - } - - if (cert_endpoint == MBEDTLS_SSL_IS_SERVER) { - ext_oid = MBEDTLS_OID_SERVER_AUTH; - ext_len = MBEDTLS_OID_SIZE(MBEDTLS_OID_SERVER_AUTH); - } else { - ext_oid = MBEDTLS_OID_CLIENT_AUTH; - ext_len = MBEDTLS_OID_SIZE(MBEDTLS_OID_CLIENT_AUTH); - } - - if (mbedtls_x509_crt_check_extended_key_usage(cert, ext_oid, ext_len) != 0) { - *flags |= MBEDTLS_X509_BADCERT_EXT_KEY_USAGE; - ret = -1; - } - - return ret; -} -#endif /* MBEDTLS_X509_CRT_PARSE_C */ - #if defined(MBEDTLS_USE_PSA_CRYPTO) int mbedtls_ssl_get_handshake_transcript(mbedtls_ssl_context *ssl, const mbedtls_md_type_t md, @@ -7927,196 +7839,6 @@ static int ssl_parse_certificate_coordinate(mbedtls_ssl_context *ssl, return SSL_CERTIFICATE_EXPECTED; } -MBEDTLS_CHECK_RETURN_CRITICAL -static int ssl_parse_certificate_verify(mbedtls_ssl_context *ssl, - int authmode, - mbedtls_x509_crt *chain, - void *rs_ctx) -{ - int ret = 0; - const mbedtls_ssl_ciphersuite_t *ciphersuite_info = - ssl->handshake->ciphersuite_info; - int have_ca_chain = 0; - - int (*f_vrfy)(void *, mbedtls_x509_crt *, int, uint32_t *); - void *p_vrfy; - - if (authmode == MBEDTLS_SSL_VERIFY_NONE) { - return 0; - } - - if (ssl->f_vrfy != NULL) { - MBEDTLS_SSL_DEBUG_MSG(3, ("Use context-specific verification callback")); - f_vrfy = ssl->f_vrfy; - p_vrfy = ssl->p_vrfy; - } else { - MBEDTLS_SSL_DEBUG_MSG(3, ("Use configuration-specific verification callback")); - f_vrfy = ssl->conf->f_vrfy; - p_vrfy = ssl->conf->p_vrfy; - } - - /* - * Main check: verify certificate - */ -#if defined(MBEDTLS_X509_TRUSTED_CERTIFICATE_CALLBACK) - if (ssl->conf->f_ca_cb != NULL) { - ((void) rs_ctx); - have_ca_chain = 1; - - MBEDTLS_SSL_DEBUG_MSG(3, ("use CA callback for X.509 CRT verification")); - ret = mbedtls_x509_crt_verify_with_ca_cb( - chain, - ssl->conf->f_ca_cb, - ssl->conf->p_ca_cb, - ssl->conf->cert_profile, - ssl->hostname, - &ssl->session_negotiate->verify_result, - f_vrfy, p_vrfy); - } else -#endif /* MBEDTLS_X509_TRUSTED_CERTIFICATE_CALLBACK */ - { - mbedtls_x509_crt *ca_chain; - mbedtls_x509_crl *ca_crl; - -#if defined(MBEDTLS_SSL_SERVER_NAME_INDICATION) - if (ssl->handshake->sni_ca_chain != NULL) { - ca_chain = ssl->handshake->sni_ca_chain; - ca_crl = ssl->handshake->sni_ca_crl; - } else -#endif - { - ca_chain = ssl->conf->ca_chain; - ca_crl = ssl->conf->ca_crl; - } - - if (ca_chain != NULL) { - have_ca_chain = 1; - } - - ret = mbedtls_x509_crt_verify_restartable( - chain, - ca_chain, ca_crl, - ssl->conf->cert_profile, - ssl->hostname, - &ssl->session_negotiate->verify_result, - f_vrfy, p_vrfy, rs_ctx); - } - - if (ret != 0) { - MBEDTLS_SSL_DEBUG_RET(1, "x509_verify_cert", ret); - } - -#if defined(MBEDTLS_SSL_ECP_RESTARTABLE_ENABLED) - if (ret == MBEDTLS_ERR_ECP_IN_PROGRESS) { - return MBEDTLS_ERR_SSL_CRYPTO_IN_PROGRESS; - } -#endif - - /* - * Secondary checks: always done, but change 'ret' only if it was 0 - */ - -#if defined(MBEDTLS_PK_HAVE_ECC_KEYS) - { - const mbedtls_pk_context *pk = &chain->pk; - - /* If certificate uses an EC key, make sure the curve is OK. - * This is a public key, so it can't be opaque, so can_do() is a good - * enough check to ensure pk_ec() is safe to use here. */ - if (mbedtls_pk_can_do(pk, MBEDTLS_PK_ECKEY)) { - /* and in the unlikely case the above assumption no longer holds - * we are making sure that pk_ec() here does not return a NULL - */ - mbedtls_ecp_group_id grp_id = mbedtls_pk_get_ec_group_id(pk); - if (grp_id == MBEDTLS_ECP_DP_NONE) { - MBEDTLS_SSL_DEBUG_MSG(1, ("invalid group ID")); - return MBEDTLS_ERR_SSL_INTERNAL_ERROR; - } - if (mbedtls_ssl_check_curve(ssl, grp_id) != 0) { - ssl->session_negotiate->verify_result |= - MBEDTLS_X509_BADCERT_BAD_KEY; - - MBEDTLS_SSL_DEBUG_MSG(1, ("bad certificate (EC key curve)")); - if (ret == 0) { - ret = MBEDTLS_ERR_SSL_BAD_CERTIFICATE; - } - } - } - } -#endif /* MBEDTLS_PK_HAVE_ECC_KEYS */ - - if (mbedtls_ssl_check_cert_usage(chain, - ciphersuite_info, - !ssl->conf->endpoint, - &ssl->session_negotiate->verify_result) != 0) { - MBEDTLS_SSL_DEBUG_MSG(1, ("bad certificate (usage extensions)")); - if (ret == 0) { - ret = MBEDTLS_ERR_SSL_BAD_CERTIFICATE; - } - } - - /* mbedtls_x509_crt_verify_with_profile is supposed to report a - * verification failure through MBEDTLS_ERR_X509_CERT_VERIFY_FAILED, - * with details encoded in the verification flags. All other kinds - * of error codes, including those from the user provided f_vrfy - * functions, are treated as fatal and lead to a failure of - * ssl_parse_certificate even if verification was optional. */ - if (authmode == MBEDTLS_SSL_VERIFY_OPTIONAL && - (ret == MBEDTLS_ERR_X509_CERT_VERIFY_FAILED || - ret == MBEDTLS_ERR_SSL_BAD_CERTIFICATE)) { - ret = 0; - } - - if (have_ca_chain == 0 && authmode == MBEDTLS_SSL_VERIFY_REQUIRED) { - MBEDTLS_SSL_DEBUG_MSG(1, ("got no CA chain")); - ret = MBEDTLS_ERR_SSL_CA_CHAIN_REQUIRED; - } - - if (ret != 0) { - uint8_t alert; - - /* The certificate may have been rejected for several reasons. - Pick one and send the corresponding alert. Which alert to send - may be a subject of debate in some cases. */ - if (ssl->session_negotiate->verify_result & MBEDTLS_X509_BADCERT_OTHER) { - alert = MBEDTLS_SSL_ALERT_MSG_ACCESS_DENIED; - } else if (ssl->session_negotiate->verify_result & MBEDTLS_X509_BADCERT_CN_MISMATCH) { - alert = MBEDTLS_SSL_ALERT_MSG_BAD_CERT; - } else if (ssl->session_negotiate->verify_result & MBEDTLS_X509_BADCERT_KEY_USAGE) { - alert = MBEDTLS_SSL_ALERT_MSG_UNSUPPORTED_CERT; - } else if (ssl->session_negotiate->verify_result & MBEDTLS_X509_BADCERT_EXT_KEY_USAGE) { - alert = MBEDTLS_SSL_ALERT_MSG_UNSUPPORTED_CERT; - } else if (ssl->session_negotiate->verify_result & MBEDTLS_X509_BADCERT_NS_CERT_TYPE) { - alert = MBEDTLS_SSL_ALERT_MSG_UNSUPPORTED_CERT; - } else if (ssl->session_negotiate->verify_result & MBEDTLS_X509_BADCERT_BAD_PK) { - alert = MBEDTLS_SSL_ALERT_MSG_UNSUPPORTED_CERT; - } else if (ssl->session_negotiate->verify_result & MBEDTLS_X509_BADCERT_BAD_KEY) { - alert = MBEDTLS_SSL_ALERT_MSG_UNSUPPORTED_CERT; - } else if (ssl->session_negotiate->verify_result & MBEDTLS_X509_BADCERT_EXPIRED) { - alert = MBEDTLS_SSL_ALERT_MSG_CERT_EXPIRED; - } else if (ssl->session_negotiate->verify_result & MBEDTLS_X509_BADCERT_REVOKED) { - alert = MBEDTLS_SSL_ALERT_MSG_CERT_REVOKED; - } else if (ssl->session_negotiate->verify_result & MBEDTLS_X509_BADCERT_NOT_TRUSTED) { - alert = MBEDTLS_SSL_ALERT_MSG_UNKNOWN_CA; - } else { - alert = MBEDTLS_SSL_ALERT_MSG_CERT_UNKNOWN; - } - mbedtls_ssl_send_alert_message(ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL, - alert); - } - -#if defined(MBEDTLS_DEBUG_C) - if (ssl->session_negotiate->verify_result != 0) { - MBEDTLS_SSL_DEBUG_MSG(3, ("! Certificate verification flags %08x", - (unsigned int) ssl->session_negotiate->verify_result)); - } else { - MBEDTLS_SSL_DEBUG_MSG(3, ("Certificate verification flags clear")); - } -#endif /* MBEDTLS_DEBUG_C */ - - return ret; -} - #if !defined(MBEDTLS_SSL_KEEP_PEER_CERTIFICATE) MBEDTLS_CHECK_RETURN_CRITICAL static int ssl_remember_peer_crt_digest(mbedtls_ssl_context *ssl, @@ -8173,6 +7895,7 @@ int mbedtls_ssl_parse_certificate(mbedtls_ssl_context *ssl) { int ret = 0; int crt_expected; + /* Authmode: precedence order is SNI if used else configuration */ #if defined(MBEDTLS_SSL_SRV_C) && defined(MBEDTLS_SSL_SERVER_NAME_INDICATION) const int authmode = ssl->handshake->sni_authmode != MBEDTLS_SSL_VERIFY_UNSET ? ssl->handshake->sni_authmode @@ -8252,8 +7975,9 @@ crt_verify: } #endif - ret = ssl_parse_certificate_verify(ssl, authmode, - chain, rs_ctx); + ret = mbedtls_ssl_verify_certificate(ssl, authmode, chain, + ssl->handshake->ciphersuite_info, + rs_ctx); if (ret != 0) { goto exit; } @@ -9919,4 +9643,274 @@ int mbedtls_ssl_session_set_ticket_alpn(mbedtls_ssl_session *session, return 0; } #endif /* MBEDTLS_SSL_SRV_C && MBEDTLS_SSL_EARLY_DATA && MBEDTLS_SSL_ALPN */ + +/* + * The following functions are used by 1.2 and 1.3, client and server. + */ +#if defined(MBEDTLS_SSL_HANDSHAKE_WITH_CERT_ENABLED) +int mbedtls_ssl_check_cert_usage(const mbedtls_x509_crt *cert, + const mbedtls_ssl_ciphersuite_t *ciphersuite, + int recv_endpoint, + mbedtls_ssl_protocol_version tls_version, + uint32_t *flags) +{ + int ret = 0; + unsigned int usage = 0; + const char *ext_oid; + size_t ext_len; + + /* + * keyUsage + */ + + /* Note: don't guard this with MBEDTLS_SSL_CLI_C because the server wants + * to check what a compliant client will think while choosing which cert + * to send to the client. */ +#if defined(MBEDTLS_SSL_PROTO_TLS1_2) + if (tls_version == MBEDTLS_SSL_VERSION_TLS1_2 && + recv_endpoint == MBEDTLS_SSL_IS_CLIENT) { + /* TLS 1.2 server part of the key exchange */ + switch (ciphersuite->key_exchange) { + case MBEDTLS_KEY_EXCHANGE_RSA: + case MBEDTLS_KEY_EXCHANGE_RSA_PSK: + usage = MBEDTLS_X509_KU_KEY_ENCIPHERMENT; + break; + + case MBEDTLS_KEY_EXCHANGE_DHE_RSA: + case MBEDTLS_KEY_EXCHANGE_ECDHE_RSA: + case MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA: + usage = MBEDTLS_X509_KU_DIGITAL_SIGNATURE; + break; + + case MBEDTLS_KEY_EXCHANGE_ECDH_RSA: + case MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA: + usage = MBEDTLS_X509_KU_KEY_AGREEMENT; + break; + + /* Don't use default: we want warnings when adding new values */ + case MBEDTLS_KEY_EXCHANGE_NONE: + case MBEDTLS_KEY_EXCHANGE_PSK: + case MBEDTLS_KEY_EXCHANGE_DHE_PSK: + case MBEDTLS_KEY_EXCHANGE_ECDHE_PSK: + case MBEDTLS_KEY_EXCHANGE_ECJPAKE: + usage = 0; + } + } else +#endif + { + /* This is either TLS 1.3 authentication, which always uses signatures, + * or 1.2 client auth: rsa_sign and mbedtls_ecdsa_sign are the only + * options we implement, both using signatures. */ + (void) tls_version; + (void) ciphersuite; + usage = MBEDTLS_X509_KU_DIGITAL_SIGNATURE; + } + + if (mbedtls_x509_crt_check_key_usage(cert, usage) != 0) { + *flags |= MBEDTLS_X509_BADCERT_KEY_USAGE; + ret = -1; + } + + /* + * extKeyUsage + */ + + if (recv_endpoint == MBEDTLS_SSL_IS_CLIENT) { + ext_oid = MBEDTLS_OID_SERVER_AUTH; + ext_len = MBEDTLS_OID_SIZE(MBEDTLS_OID_SERVER_AUTH); + } else { + ext_oid = MBEDTLS_OID_CLIENT_AUTH; + ext_len = MBEDTLS_OID_SIZE(MBEDTLS_OID_CLIENT_AUTH); + } + + if (mbedtls_x509_crt_check_extended_key_usage(cert, ext_oid, ext_len) != 0) { + *flags |= MBEDTLS_X509_BADCERT_EXT_KEY_USAGE; + ret = -1; + } + + return ret; +} + +int mbedtls_ssl_verify_certificate(mbedtls_ssl_context *ssl, + int authmode, + mbedtls_x509_crt *chain, + const mbedtls_ssl_ciphersuite_t *ciphersuite_info, + void *rs_ctx) +{ + if (authmode == MBEDTLS_SSL_VERIFY_NONE) { + return 0; + } + + /* + * Primary check: use the appropriate X.509 verification function + */ + int (*f_vrfy)(void *, mbedtls_x509_crt *, int, uint32_t *); + void *p_vrfy; + if (ssl->f_vrfy != NULL) { + MBEDTLS_SSL_DEBUG_MSG(3, ("Use context-specific verification callback")); + f_vrfy = ssl->f_vrfy; + p_vrfy = ssl->p_vrfy; + } else { + MBEDTLS_SSL_DEBUG_MSG(3, ("Use configuration-specific verification callback")); + f_vrfy = ssl->conf->f_vrfy; + p_vrfy = ssl->conf->p_vrfy; + } + + int ret = 0; + int have_ca_chain_or_callback = 0; +#if defined(MBEDTLS_X509_TRUSTED_CERTIFICATE_CALLBACK) + if (ssl->conf->f_ca_cb != NULL) { + ((void) rs_ctx); + have_ca_chain_or_callback = 1; + + MBEDTLS_SSL_DEBUG_MSG(3, ("use CA callback for X.509 CRT verification")); + ret = mbedtls_x509_crt_verify_with_ca_cb( + chain, + ssl->conf->f_ca_cb, + ssl->conf->p_ca_cb, + ssl->conf->cert_profile, + ssl->hostname, + &ssl->session_negotiate->verify_result, + f_vrfy, p_vrfy); + } else +#endif /* MBEDTLS_X509_TRUSTED_CERTIFICATE_CALLBACK */ + { + mbedtls_x509_crt *ca_chain; + mbedtls_x509_crl *ca_crl; +#if defined(MBEDTLS_SSL_SERVER_NAME_INDICATION) + if (ssl->handshake->sni_ca_chain != NULL) { + ca_chain = ssl->handshake->sni_ca_chain; + ca_crl = ssl->handshake->sni_ca_crl; + } else +#endif + { + ca_chain = ssl->conf->ca_chain; + ca_crl = ssl->conf->ca_crl; + } + + if (ca_chain != NULL) { + have_ca_chain_or_callback = 1; + } + + ret = mbedtls_x509_crt_verify_restartable( + chain, + ca_chain, ca_crl, + ssl->conf->cert_profile, + ssl->hostname, + &ssl->session_negotiate->verify_result, + f_vrfy, p_vrfy, rs_ctx); + } + + if (ret != 0) { + MBEDTLS_SSL_DEBUG_RET(1, "x509_verify_cert", ret); + } + +#if defined(MBEDTLS_SSL_ECP_RESTARTABLE_ENABLED) + if (ret == MBEDTLS_ERR_ECP_IN_PROGRESS) { + return MBEDTLS_ERR_SSL_CRYPTO_IN_PROGRESS; + } +#endif + + /* + * Secondary checks: always done, but change 'ret' only if it was 0 + */ + + /* With TLS 1.2 and ECC certs, check that the curve used by the + * certificate is on our list of acceptable curves. + * + * With TLS 1.3 this is not needed because the curve is part of the + * signature algorithm (eg ecdsa_secp256r1_sha256) which is checked when + * we validate the signature made with the key associated to this cert. + */ +#if defined(MBEDTLS_SSL_PROTO_TLS1_2) && \ + defined(MBEDTLS_PK_HAVE_ECC_KEYS) + if (ssl->tls_version == MBEDTLS_SSL_VERSION_TLS1_2 && + mbedtls_pk_can_do(&chain->pk, MBEDTLS_PK_ECKEY)) { + if (mbedtls_ssl_check_curve(ssl, mbedtls_pk_get_ec_group_id(&chain->pk)) != 0) { + MBEDTLS_SSL_DEBUG_MSG(1, ("bad certificate (EC key curve)")); + ssl->session_negotiate->verify_result |= MBEDTLS_X509_BADCERT_BAD_KEY; + if (ret == 0) { + ret = MBEDTLS_ERR_SSL_BAD_CERTIFICATE; + } + } + } +#endif /* MBEDTLS_SSL_PROTO_TLS1_2 && MBEDTLS_PK_HAVE_ECC_KEYS */ + + /* Check X.509 usage extensions (keyUsage, extKeyUsage) */ + if (mbedtls_ssl_check_cert_usage(chain, + ciphersuite_info, + ssl->conf->endpoint, + ssl->tls_version, + &ssl->session_negotiate->verify_result) != 0) { + MBEDTLS_SSL_DEBUG_MSG(1, ("bad certificate (usage extensions)")); + if (ret == 0) { + ret = MBEDTLS_ERR_SSL_BAD_CERTIFICATE; + } + } + + /* With authmode optional, we want to keep going if the certificate was + * unacceptable, but still fail on other errors (out of memory etc), + * including fatal errors from the f_vrfy callback. + * + * The only acceptable errors are: + * - MBEDTLS_ERR_X509_CERT_VERIFY_FAILED: cert rejected by primary check; + * - MBEDTLS_ERR_SSL_BAD_CERTIFICATE: cert rejected by secondary checks. + * Anything else is a fatal error. */ + if (authmode == MBEDTLS_SSL_VERIFY_OPTIONAL && + (ret == MBEDTLS_ERR_X509_CERT_VERIFY_FAILED || + ret == MBEDTLS_ERR_SSL_BAD_CERTIFICATE)) { + ret = 0; + } + + /* Return a specific error as this is a user error: inconsistent + * configuration - can't verify without trust anchors. */ + if (have_ca_chain_or_callback == 0 && authmode == MBEDTLS_SSL_VERIFY_REQUIRED) { + MBEDTLS_SSL_DEBUG_MSG(1, ("got no CA chain")); + ret = MBEDTLS_ERR_SSL_CA_CHAIN_REQUIRED; + } + + if (ret != 0) { + uint8_t alert; + + /* The certificate may have been rejected for several reasons. + Pick one and send the corresponding alert. Which alert to send + may be a subject of debate in some cases. */ + if (ssl->session_negotiate->verify_result & MBEDTLS_X509_BADCERT_OTHER) { + alert = MBEDTLS_SSL_ALERT_MSG_ACCESS_DENIED; + } else if (ssl->session_negotiate->verify_result & MBEDTLS_X509_BADCERT_CN_MISMATCH) { + alert = MBEDTLS_SSL_ALERT_MSG_BAD_CERT; + } else if (ssl->session_negotiate->verify_result & MBEDTLS_X509_BADCERT_KEY_USAGE) { + alert = MBEDTLS_SSL_ALERT_MSG_UNSUPPORTED_CERT; + } else if (ssl->session_negotiate->verify_result & MBEDTLS_X509_BADCERT_EXT_KEY_USAGE) { + alert = MBEDTLS_SSL_ALERT_MSG_UNSUPPORTED_CERT; + } else if (ssl->session_negotiate->verify_result & MBEDTLS_X509_BADCERT_BAD_PK) { + alert = MBEDTLS_SSL_ALERT_MSG_UNSUPPORTED_CERT; + } else if (ssl->session_negotiate->verify_result & MBEDTLS_X509_BADCERT_BAD_KEY) { + alert = MBEDTLS_SSL_ALERT_MSG_UNSUPPORTED_CERT; + } else if (ssl->session_negotiate->verify_result & MBEDTLS_X509_BADCERT_EXPIRED) { + alert = MBEDTLS_SSL_ALERT_MSG_CERT_EXPIRED; + } else if (ssl->session_negotiate->verify_result & MBEDTLS_X509_BADCERT_REVOKED) { + alert = MBEDTLS_SSL_ALERT_MSG_CERT_REVOKED; + } else if (ssl->session_negotiate->verify_result & MBEDTLS_X509_BADCERT_NOT_TRUSTED) { + alert = MBEDTLS_SSL_ALERT_MSG_UNKNOWN_CA; + } else { + alert = MBEDTLS_SSL_ALERT_MSG_CERT_UNKNOWN; + } + mbedtls_ssl_send_alert_message(ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL, + alert); + } + +#if defined(MBEDTLS_DEBUG_C) + if (ssl->session_negotiate->verify_result != 0) { + MBEDTLS_SSL_DEBUG_MSG(3, ("! Certificate verification flags %08x", + (unsigned int) ssl->session_negotiate->verify_result)); + } else { + MBEDTLS_SSL_DEBUG_MSG(3, ("Certificate verification flags clear")); + } +#endif /* MBEDTLS_DEBUG_C */ + + return ret; +} +#endif /* MBEDTLS_SSL_HANDSHAKE_WITH_CERT_ENABLED */ + #endif /* MBEDTLS_SSL_TLS_C */ diff --git a/library/ssl_tls12_server.c b/library/ssl_tls12_server.c index b49a8ae6a..08e2dbf78 100644 --- a/library/ssl_tls12_server.c +++ b/library/ssl_tls12_server.c @@ -756,7 +756,9 @@ static int ssl_pick_cert(mbedtls_ssl_context *ssl, * and decrypting with the same RSA key. */ if (mbedtls_ssl_check_cert_usage(cur->cert, ciphersuite_info, - MBEDTLS_SSL_IS_SERVER, &flags) != 0) { + MBEDTLS_SSL_IS_CLIENT, + MBEDTLS_SSL_VERSION_TLS1_2, + &flags) != 0) { MBEDTLS_SSL_DEBUG_MSG(3, ("certificate mismatch: " "(extended) key usage extension")); continue; diff --git a/library/ssl_tls13_generic.c b/library/ssl_tls13_generic.c index d448a054a..ea8aff613 100644 --- a/library/ssl_tls13_generic.c +++ b/library/ssl_tls13_generic.c @@ -470,6 +470,7 @@ int mbedtls_ssl_tls13_parse_certificate(mbedtls_ssl_context *ssl, mbedtls_free(ssl->session_negotiate->peer_cert); } + /* This is used by ssl_tls13_validate_certificate() */ if (certificate_list_len == 0) { ssl->session_negotiate->peer_cert = NULL; ret = 0; @@ -625,25 +626,13 @@ int mbedtls_ssl_tls13_parse_certificate(mbedtls_ssl_context *ssl, MBEDTLS_CHECK_RETURN_CRITICAL static int ssl_tls13_validate_certificate(mbedtls_ssl_context *ssl) { - int ret = 0; - int authmode = MBEDTLS_SSL_VERIFY_REQUIRED; - mbedtls_x509_crt *ca_chain; - mbedtls_x509_crl *ca_crl; - const char *ext_oid; - size_t ext_len; - uint32_t verify_result = 0; - - /* If SNI was used, overwrite authentication mode - * from the configuration. */ -#if defined(MBEDTLS_SSL_SRV_C) - if (ssl->conf->endpoint == MBEDTLS_SSL_IS_SERVER) { -#if defined(MBEDTLS_SSL_SERVER_NAME_INDICATION) - if (ssl->handshake->sni_authmode != MBEDTLS_SSL_VERIFY_UNSET) { - authmode = ssl->handshake->sni_authmode; - } else -#endif - authmode = ssl->conf->authmode; - } + /* Authmode: precedence order is SNI if used else configuration */ +#if defined(MBEDTLS_SSL_SRV_C) && defined(MBEDTLS_SSL_SERVER_NAME_INDICATION) + const int authmode = ssl->handshake->sni_authmode != MBEDTLS_SSL_VERIFY_UNSET + ? ssl->handshake->sni_authmode + : ssl->conf->authmode; +#else + const int authmode = ssl->conf->authmode; #endif /* @@ -675,6 +664,11 @@ static int ssl_tls13_validate_certificate(mbedtls_ssl_context *ssl) #endif /* MBEDTLS_SSL_SRV_C */ #if defined(MBEDTLS_SSL_CLI_C) + /* Regardless of authmode, the server is not allowed to send an empty + * certificate chain. (Last paragraph before 4.4.2.1 in RFC 8446: "The + * server's certificate_list MUST always be non-empty.") With authmode + * optional/none, we continue the handshake if we can't validate the + * server's cert, but we still break it if no certificate was sent. */ if (ssl->conf->endpoint == MBEDTLS_SSL_IS_CLIENT) { MBEDTLS_SSL_PEND_FATAL_ALERT(MBEDTLS_SSL_ALERT_MSG_NO_CERT, MBEDTLS_ERR_SSL_FATAL_ALERT_MESSAGE); @@ -683,114 +677,9 @@ static int ssl_tls13_validate_certificate(mbedtls_ssl_context *ssl) #endif /* MBEDTLS_SSL_CLI_C */ } -#if defined(MBEDTLS_SSL_SERVER_NAME_INDICATION) - if (ssl->handshake->sni_ca_chain != NULL) { - ca_chain = ssl->handshake->sni_ca_chain; - ca_crl = ssl->handshake->sni_ca_crl; - } else -#endif /* MBEDTLS_SSL_SERVER_NAME_INDICATION */ - { - ca_chain = ssl->conf->ca_chain; - ca_crl = ssl->conf->ca_crl; - } - - /* - * Main check: verify certificate - */ - ret = mbedtls_x509_crt_verify_with_profile( - ssl->session_negotiate->peer_cert, - ca_chain, ca_crl, - ssl->conf->cert_profile, - ssl->hostname, - &verify_result, - ssl->conf->f_vrfy, ssl->conf->p_vrfy); - - if (ret != 0) { - MBEDTLS_SSL_DEBUG_RET(1, "x509_verify_cert", ret); - } - - /* - * Secondary checks: always done, but change 'ret' only if it was 0 - */ - if (ssl->conf->endpoint == MBEDTLS_SSL_IS_CLIENT) { - ext_oid = MBEDTLS_OID_SERVER_AUTH; - ext_len = MBEDTLS_OID_SIZE(MBEDTLS_OID_SERVER_AUTH); - } else { - ext_oid = MBEDTLS_OID_CLIENT_AUTH; - ext_len = MBEDTLS_OID_SIZE(MBEDTLS_OID_CLIENT_AUTH); - } - - if ((mbedtls_x509_crt_check_key_usage( - ssl->session_negotiate->peer_cert, - MBEDTLS_X509_KU_DIGITAL_SIGNATURE) != 0) || - (mbedtls_x509_crt_check_extended_key_usage( - ssl->session_negotiate->peer_cert, - ext_oid, ext_len) != 0)) { - MBEDTLS_SSL_DEBUG_MSG(1, ("bad certificate (usage extensions)")); - if (ret == 0) { - ret = MBEDTLS_ERR_SSL_BAD_CERTIFICATE; - } - } - - /* mbedtls_x509_crt_verify_with_profile is supposed to report a - * verification failure through MBEDTLS_ERR_X509_CERT_VERIFY_FAILED, - * with details encoded in the verification flags. All other kinds - * of error codes, including those from the user provided f_vrfy - * functions, are treated as fatal and lead to a failure of - * mbedtls_ssl_tls13_parse_certificate even if verification was optional. - */ - if (authmode == MBEDTLS_SSL_VERIFY_OPTIONAL && - (ret == MBEDTLS_ERR_X509_CERT_VERIFY_FAILED || - ret == MBEDTLS_ERR_SSL_BAD_CERTIFICATE)) { - ret = 0; - } - - if (ca_chain == NULL && authmode == MBEDTLS_SSL_VERIFY_REQUIRED) { - MBEDTLS_SSL_DEBUG_MSG(1, ("got no CA chain")); - ret = MBEDTLS_ERR_SSL_CA_CHAIN_REQUIRED; - } - - if (ret != 0) { - /* The certificate may have been rejected for several reasons. - Pick one and send the corresponding alert. Which alert to send - may be a subject of debate in some cases. */ - if (verify_result & MBEDTLS_X509_BADCERT_OTHER) { - MBEDTLS_SSL_PEND_FATAL_ALERT( - MBEDTLS_SSL_ALERT_MSG_ACCESS_DENIED, ret); - } else if (verify_result & MBEDTLS_X509_BADCERT_CN_MISMATCH) { - MBEDTLS_SSL_PEND_FATAL_ALERT(MBEDTLS_SSL_ALERT_MSG_BAD_CERT, ret); - } else if (verify_result & (MBEDTLS_X509_BADCERT_KEY_USAGE | - MBEDTLS_X509_BADCERT_EXT_KEY_USAGE | - MBEDTLS_X509_BADCERT_NS_CERT_TYPE | - MBEDTLS_X509_BADCERT_BAD_PK | - MBEDTLS_X509_BADCERT_BAD_KEY)) { - MBEDTLS_SSL_PEND_FATAL_ALERT( - MBEDTLS_SSL_ALERT_MSG_UNSUPPORTED_CERT, ret); - } else if (verify_result & MBEDTLS_X509_BADCERT_EXPIRED) { - MBEDTLS_SSL_PEND_FATAL_ALERT( - MBEDTLS_SSL_ALERT_MSG_CERT_EXPIRED, ret); - } else if (verify_result & MBEDTLS_X509_BADCERT_REVOKED) { - MBEDTLS_SSL_PEND_FATAL_ALERT( - MBEDTLS_SSL_ALERT_MSG_CERT_REVOKED, ret); - } else if (verify_result & MBEDTLS_X509_BADCERT_NOT_TRUSTED) { - MBEDTLS_SSL_PEND_FATAL_ALERT(MBEDTLS_SSL_ALERT_MSG_UNKNOWN_CA, ret); - } else { - MBEDTLS_SSL_PEND_FATAL_ALERT( - MBEDTLS_SSL_ALERT_MSG_CERT_UNKNOWN, ret); - } - } - -#if defined(MBEDTLS_DEBUG_C) - if (verify_result != 0) { - MBEDTLS_SSL_DEBUG_MSG(3, ("! Certificate verification flags %08x", - (unsigned int) verify_result)); - } else { - MBEDTLS_SSL_DEBUG_MSG(3, ("Certificate verification flags clear")); - } -#endif /* MBEDTLS_DEBUG_C */ - - ssl->session_negotiate->verify_result = verify_result; - return ret; + return mbedtls_ssl_verify_certificate(ssl, authmode, + ssl->session_negotiate->peer_cert, + NULL, NULL); } #else /* MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */ MBEDTLS_CHECK_RETURN_CRITICAL diff --git a/programs/ssl/ssl_client2.c b/programs/ssl/ssl_client2.c index 43133d901..64564ab07 100644 --- a/programs/ssl/ssl_client2.c +++ b/programs/ssl/ssl_client2.c @@ -2204,7 +2204,9 @@ usage: ret != MBEDTLS_ERR_SSL_CRYPTO_IN_PROGRESS) { mbedtls_printf(" failed\n ! mbedtls_ssl_handshake returned -0x%x\n", (unsigned int) -ret); - if (ret == MBEDTLS_ERR_X509_CERT_VERIFY_FAILED) { +#if defined(MBEDTLS_SSL_HANDSHAKE_WITH_CERT_ENABLED) + if (ret == MBEDTLS_ERR_X509_CERT_VERIFY_FAILED || + ret == MBEDTLS_ERR_SSL_BAD_CERTIFICATE) { mbedtls_printf( " Unable to verify the server's certificate. " "Either it is invalid,\n" @@ -2215,7 +2217,13 @@ usage: "not using TLS 1.3.\n" " For TLS 1.3 server, try `ca_path=/etc/ssl/certs/`" "or other folder that has root certificates\n"); + + flags = mbedtls_ssl_get_verify_result(&ssl); + char vrfy_buf[512]; + x509_crt_verify_info(vrfy_buf, sizeof(vrfy_buf), " ! ", flags); + mbedtls_printf("%s\n", vrfy_buf); } +#endif mbedtls_printf("\n"); goto exit; } diff --git a/programs/ssl/ssl_server2.c b/programs/ssl/ssl_server2.c index a5d2ed102..0f871f712 100644 --- a/programs/ssl/ssl_server2.c +++ b/programs/ssl/ssl_server2.c @@ -3504,7 +3504,8 @@ handshake: (unsigned int) -ret); #if defined(MBEDTLS_SSL_HANDSHAKE_WITH_CERT_ENABLED) - if (ret == MBEDTLS_ERR_X509_CERT_VERIFY_FAILED) { + if (ret == MBEDTLS_ERR_X509_CERT_VERIFY_FAILED || + ret == MBEDTLS_ERR_SSL_BAD_CERTIFICATE) { char vrfy_buf[512]; flags = mbedtls_ssl_get_verify_result(&ssl); -- Gitee