Import mbedtls-3.6.2
Imports Mbed TLS 3.6.2 from https://github.com/Mbed-TLS/mbedtls.git
tags mbedtls-3.6.2, v3.6.2
Files that are not needed are removed:
cd lib/libmbedtls
rm -rf mbedtls
cp -R path/to/mbedtls-3.6.2/mbedtls .
cd mbedtls
rm CMakeLists.txt DartConfiguration.tcl Makefile
rm .gitignore .travis.yml .pylintrc .globalrc .mypy.ini BRANCHES.md
rm include/.gitignore include/CMakeLists.txt library/.gitignore
rm library/CMakeLists.txt library/Makefile
rm -r cmake
rm -rf .git .github doxygen configs programs scripts tests visualc
rm -rf 3rdparty ChangeLog.d docs pkgconfig .gitmodules .readthedocs.yaml
rm library/mps_*
cd ..
git add mbedtls
This is a complete overwrite of previous code so earlier changes in the
previous branch import/mbedtls-3.6.0 will be added on top of this
commit.
Signed-off-by: Sungbae Yoo <sungbaey@nvidia.com>
diff --git a/lib/libmbedtls/mbedtls/library/ssl_tls.c b/lib/libmbedtls/mbedtls/library/ssl_tls.c
index c5e0649..c773365 100644
--- a/lib/libmbedtls/mbedtls/library/ssl_tls.c
+++ b/lib/libmbedtls/mbedtls/library/ssl_tls.c
@@ -132,7 +132,7 @@
int mbedtls_ssl_get_own_cid(mbedtls_ssl_context *ssl,
int *enabled,
- unsigned char own_cid[MBEDTLS_SSL_CID_OUT_LEN_MAX],
+ unsigned char own_cid[MBEDTLS_SSL_CID_IN_LEN_MAX],
size_t *own_cid_len)
{
*enabled = MBEDTLS_SSL_CID_DISABLED;
@@ -1354,29 +1354,6 @@
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;
@@ -1760,6 +1737,7 @@
#if defined(MBEDTLS_SSL_PROTO_TLS1_3)
if (session->tls_version == MBEDTLS_SSL_VERSION_TLS1_3) {
+#if defined(MBEDTLS_SSL_SESSION_TICKETS)
const mbedtls_ssl_ciphersuite_t *ciphersuite_info =
mbedtls_ssl_ciphersuite_from_id(session->ciphersuite);
@@ -1770,6 +1748,14 @@
session->ciphersuite));
return MBEDTLS_ERR_SSL_BAD_INPUT_DATA;
}
+#else
+ /*
+ * If session tickets are not enabled, it is not possible to resume a
+ * TLS 1.3 session, thus do not make any change to the SSL context in
+ * the first place.
+ */
+ return 0;
+#endif
}
#endif /* MBEDTLS_SSL_PROTO_TLS1_3 */
@@ -2234,6 +2220,7 @@
mbedtls_zeroize_and_free(ssl->handshake->psk,
ssl->handshake->psk_len);
ssl->handshake->psk_len = 0;
+ ssl->handshake->psk = NULL;
}
#endif /* MBEDTLS_USE_PSA_CRYPTO */
}
@@ -2999,11 +2986,24 @@
#if defined(MBEDTLS_SSL_SESSION_TICKETS)
#if defined(MBEDTLS_SSL_CLI_C)
+
void mbedtls_ssl_conf_session_tickets(mbedtls_ssl_config *conf, int use_tickets)
{
- conf->session_tickets = use_tickets;
+ conf->session_tickets &= ~MBEDTLS_SSL_SESSION_TICKETS_TLS1_2_MASK;
+ conf->session_tickets |= (use_tickets != 0) <<
+ MBEDTLS_SSL_SESSION_TICKETS_TLS1_2_BIT;
}
-#endif
+
+#if defined(MBEDTLS_SSL_PROTO_TLS1_3)
+void mbedtls_ssl_conf_tls13_enable_signal_new_session_tickets(
+ mbedtls_ssl_config *conf, int signal_new_session_tickets)
+{
+ conf->session_tickets &= ~MBEDTLS_SSL_SESSION_TICKETS_TLS1_3_MASK;
+ conf->session_tickets |= (signal_new_session_tickets != 0) <<
+ MBEDTLS_SSL_SESSION_TICKETS_TLS1_3_BIT;
+}
+#endif /* MBEDTLS_SSL_PROTO_TLS1_3 */
+#endif /* MBEDTLS_SSL_CLI_C */
#if defined(MBEDTLS_SSL_SRV_C)
@@ -4049,7 +4049,7 @@
}
static int ssl_tls13_session_load(const mbedtls_ssl_session *session,
- unsigned char *buf,
+ const unsigned char *buf,
size_t buf_len)
{
((void) session);
@@ -5868,7 +5868,33 @@
if (endpoint == MBEDTLS_SSL_IS_CLIENT) {
conf->authmode = MBEDTLS_SSL_VERIFY_REQUIRED;
#if defined(MBEDTLS_SSL_SESSION_TICKETS)
- conf->session_tickets = MBEDTLS_SSL_SESSION_TICKETS_ENABLED;
+ mbedtls_ssl_conf_session_tickets(conf, MBEDTLS_SSL_SESSION_TICKETS_ENABLED);
+#if defined(MBEDTLS_SSL_PROTO_TLS1_3)
+ /* Contrary to TLS 1.2 tickets, TLS 1.3 NewSessionTicket message
+ * handling is disabled by default in Mbed TLS 3.6.x for backward
+ * compatibility with client applications developed using Mbed TLS 3.5
+ * or earlier with the default configuration.
+ *
+ * Up to Mbed TLS 3.5, in the default configuration TLS 1.3 was
+ * disabled, and a Mbed TLS client with the default configuration would
+ * establish a TLS 1.2 connection with a TLS 1.2 and TLS 1.3 capable
+ * server.
+ *
+ * Starting with Mbed TLS 3.6.0, TLS 1.3 is enabled by default, and thus
+ * an Mbed TLS client with the default configuration establishes a
+ * TLS 1.3 connection with a TLS 1.2 and TLS 1.3 capable server. If
+ * following the handshake the TLS 1.3 server sends NewSessionTicket
+ * messages and the Mbed TLS client processes them, this results in
+ * Mbed TLS high level APIs (mbedtls_ssl_read(),
+ * mbedtls_ssl_handshake(), ...) to eventually return an
+ * #MBEDTLS_ERR_SSL_RECEIVED_NEW_SESSION_TICKET non fatal error code
+ * (see the documentation of mbedtls_ssl_read() for more information on
+ * that error code). Applications unaware of that TLS 1.3 specific non
+ * fatal error code are then failing.
+ */
+ mbedtls_ssl_conf_tls13_enable_signal_new_session_tickets(
+ conf, MBEDTLS_SSL_TLS1_3_SIGNAL_NEW_SESSION_TICKETS_DISABLED);
+#endif
#endif
}
#endif
@@ -6030,6 +6056,10 @@
*/
void mbedtls_ssl_config_free(mbedtls_ssl_config *conf)
{
+ if (conf == NULL) {
+ return;
+ }
+
#if defined(MBEDTLS_DHM_C)
mbedtls_mpi_free(&conf->dhm_P);
mbedtls_mpi_free(&conf->dhm_G);
@@ -6344,71 +6374,6 @@
}
#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 +7892,6 @@
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 +7948,7 @@
{
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 +8028,9 @@
}
#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 +9696,274 @@
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 */