| /* Copyright (c) 2016, Google Inc. |
| * |
| * Permission to use, copy, modify, and/or distribute this software for any |
| * purpose with or without fee is hereby granted, provided that the above |
| * copyright notice and this permission notice appear in all copies. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
| * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
| * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY |
| * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
| * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION |
| * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN |
| * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ |
| |
| #include <openssl/ssl.h> |
| |
| #include <assert.h> |
| #include <string.h> |
| |
| #include <openssl/bytestring.h> |
| #include <openssl/digest.h> |
| #include <openssl/err.h> |
| #include <openssl/mem.h> |
| #include <openssl/stack.h> |
| #include <openssl/x509.h> |
| |
| #include "internal.h" |
| |
| |
| enum client_hs_state_t { |
| state_process_hello_retry_request = 0, |
| state_send_second_client_hello, |
| state_flush_second_client_hello, |
| state_process_server_hello, |
| state_process_encrypted_extensions, |
| state_process_certificate_request, |
| state_process_server_certificate, |
| state_process_server_certificate_verify, |
| state_process_server_finished, |
| state_certificate_callback, |
| state_send_client_certificate, |
| state_send_client_certificate_verify, |
| state_complete_client_certificate_verify, |
| state_send_client_finished, |
| state_flush, |
| state_done, |
| }; |
| |
| static enum ssl_hs_wait_t do_process_hello_retry_request(SSL *ssl, |
| SSL_HANDSHAKE *hs) { |
| if (ssl->s3->tmp.message_type != SSL3_MT_HELLO_RETRY_REQUEST) { |
| hs->state = state_process_server_hello; |
| return ssl_hs_ok; |
| } |
| |
| CBS cbs, extensions; |
| uint16_t server_wire_version, cipher_suite, group_id; |
| CBS_init(&cbs, ssl->init_msg, ssl->init_num); |
| if (!CBS_get_u16(&cbs, &server_wire_version) || |
| !CBS_get_u16(&cbs, &cipher_suite) || |
| !CBS_get_u16(&cbs, &group_id) || |
| /* We do not currently parse any HelloRetryRequest extensions. */ |
| !CBS_get_u16_length_prefixed(&cbs, &extensions) || |
| CBS_len(&cbs) != 0) { |
| ssl3_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
| return ssl_hs_error; |
| } |
| |
| /* TODO(svaldez): Don't do early_data on HelloRetryRequest. */ |
| |
| const uint16_t *groups; |
| size_t groups_len; |
| tls1_get_grouplist(ssl, 0 /* local groups */, &groups, &groups_len); |
| int found = 0; |
| for (size_t i = 0; i < groups_len; i++) { |
| if (groups[i] == group_id) { |
| found = 1; |
| break; |
| } |
| } |
| |
| if (!found) { |
| ssl3_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_ILLEGAL_PARAMETER); |
| OPENSSL_PUT_ERROR(SSL, SSL_R_WRONG_CURVE); |
| return ssl_hs_error; |
| } |
| |
| for (size_t i = 0; i < ssl->s3->hs->groups_len; i++) { |
| /* Check that the HelloRetryRequest does not request a key share that was |
| * provided in the initial ClientHello. |
| * |
| * TODO(svaldez): Don't enforce this check when the HelloRetryRequest is due |
| * to a cookie. */ |
| if (SSL_ECDH_CTX_get_id(&ssl->s3->hs->groups[i]) == group_id) { |
| ssl3_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_ILLEGAL_PARAMETER); |
| OPENSSL_PUT_ERROR(SSL, SSL_R_WRONG_CURVE); |
| return ssl_hs_error; |
| } |
| } |
| |
| ssl_handshake_clear_groups(ssl->s3->hs); |
| ssl->s3->hs->retry_group = group_id; |
| |
| hs->state = state_send_second_client_hello; |
| return ssl_hs_ok; |
| } |
| |
| static enum ssl_hs_wait_t do_send_second_client_hello(SSL *ssl, |
| SSL_HANDSHAKE *hs) { |
| CBB cbb, body; |
| if (!ssl->method->init_message(ssl, &cbb, &body, SSL3_MT_CLIENT_HELLO) || |
| !ssl_add_client_hello_body(ssl, &body) || |
| !ssl->method->finish_message(ssl, &cbb)) { |
| CBB_cleanup(&cbb); |
| return ssl_hs_error; |
| } |
| |
| hs->state = state_flush_second_client_hello; |
| return ssl_hs_write_message; |
| } |
| |
| static enum ssl_hs_wait_t do_flush_second_client_hello(SSL *ssl, |
| SSL_HANDSHAKE *hs) { |
| hs->state = state_process_server_hello; |
| return ssl_hs_flush_and_read_message; |
| } |
| |
| static enum ssl_hs_wait_t do_process_server_hello(SSL *ssl, SSL_HANDSHAKE *hs) { |
| if (!tls13_check_message_type(ssl, SSL3_MT_SERVER_HELLO)) { |
| return ssl_hs_error; |
| } |
| |
| CBS cbs, server_random, extensions; |
| uint16_t server_wire_version; |
| uint16_t cipher_suite; |
| CBS_init(&cbs, ssl->init_msg, ssl->init_num); |
| if (!CBS_get_u16(&cbs, &server_wire_version) || |
| !CBS_get_bytes(&cbs, &server_random, SSL3_RANDOM_SIZE) || |
| !CBS_get_u16(&cbs, &cipher_suite) || |
| !CBS_get_u16_length_prefixed(&cbs, &extensions) || |
| CBS_len(&cbs) != 0) { |
| ssl3_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
| OPENSSL_PUT_ERROR(SSL, SSL_R_DECODE_ERROR); |
| return ssl_hs_error; |
| } |
| |
| if (server_wire_version != ssl->version) { |
| ssl3_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
| OPENSSL_PUT_ERROR(SSL, SSL_R_WRONG_VERSION_NUMBER); |
| return ssl_hs_error; |
| } |
| |
| /* Parse out the extensions. */ |
| int have_key_share = 0, have_pre_shared_key = 0; |
| CBS key_share, pre_shared_key; |
| while (CBS_len(&extensions) != 0) { |
| uint16_t type; |
| CBS extension; |
| if (!CBS_get_u16(&extensions, &type) || |
| !CBS_get_u16_length_prefixed(&extensions, &extension)) { |
| OPENSSL_PUT_ERROR(SSL, SSL_R_PARSE_TLSEXT); |
| ssl3_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
| return ssl_hs_error; |
| } |
| |
| switch (type) { |
| case TLSEXT_TYPE_key_share: |
| if (have_key_share) { |
| OPENSSL_PUT_ERROR(SSL, SSL_R_DUPLICATE_EXTENSION); |
| ssl3_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
| return ssl_hs_error; |
| } |
| key_share = extension; |
| have_key_share = 1; |
| break; |
| case TLSEXT_TYPE_pre_shared_key: |
| if (have_pre_shared_key) { |
| OPENSSL_PUT_ERROR(SSL, SSL_R_DUPLICATE_EXTENSION); |
| ssl3_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
| return ssl_hs_error; |
| } |
| pre_shared_key = extension; |
| have_pre_shared_key = 1; |
| break; |
| default: |
| OPENSSL_PUT_ERROR(SSL, SSL_R_UNEXPECTED_EXTENSION); |
| ssl3_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_UNSUPPORTED_EXTENSION); |
| return ssl_hs_error; |
| } |
| } |
| |
| assert(ssl->s3->have_version); |
| memcpy(ssl->s3->server_random, CBS_data(&server_random), SSL3_RANDOM_SIZE); |
| |
| uint8_t alert = SSL_AD_DECODE_ERROR; |
| if (have_pre_shared_key) { |
| if (ssl->session == NULL) { |
| OPENSSL_PUT_ERROR(SSL, SSL_R_UNEXPECTED_EXTENSION); |
| ssl3_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_UNSUPPORTED_EXTENSION); |
| return ssl_hs_error; |
| } |
| |
| if (!ssl_ext_pre_shared_key_parse_serverhello(ssl, &alert, |
| &pre_shared_key)) { |
| ssl3_send_alert(ssl, SSL3_AL_FATAL, alert); |
| return ssl_hs_error; |
| } |
| |
| if (ssl->session->ssl_version != ssl->version) { |
| OPENSSL_PUT_ERROR(SSL, SSL_R_OLD_SESSION_VERSION_NOT_RETURNED); |
| ssl3_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_ILLEGAL_PARAMETER); |
| return ssl_hs_error; |
| } |
| |
| if (!ssl_session_is_context_valid(ssl, ssl->session)) { |
| /* This is actually a client application bug. */ |
| OPENSSL_PUT_ERROR(SSL, |
| SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT); |
| ssl3_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_ILLEGAL_PARAMETER); |
| return ssl_hs_error; |
| } |
| |
| ssl->s3->session_reused = 1; |
| /* Only authentication information carries over in TLS 1.3. */ |
| ssl->s3->new_session = |
| SSL_SESSION_dup(ssl->session, SSL_SESSION_DUP_AUTH_ONLY); |
| if (ssl->s3->new_session == NULL) { |
| ssl3_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); |
| return ssl_hs_error; |
| } |
| ssl_set_session(ssl, NULL); |
| } else { |
| if (!ssl_get_new_session(ssl, 0)) { |
| ssl3_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); |
| return ssl_hs_error; |
| } |
| } |
| |
| const SSL_CIPHER *cipher = SSL_get_cipher_by_value(cipher_suite); |
| if (cipher == NULL) { |
| OPENSSL_PUT_ERROR(SSL, SSL_R_UNKNOWN_CIPHER_RETURNED); |
| ssl3_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_ILLEGAL_PARAMETER); |
| return ssl_hs_error; |
| } |
| |
| if (!ssl->s3->session_reused) { |
| /* Check if the cipher is disabled. */ |
| if ((cipher->algorithm_mkey & ssl->cert->mask_k) || |
| (cipher->algorithm_auth & ssl->cert->mask_a) || |
| SSL_CIPHER_get_min_version(cipher) > ssl3_protocol_version(ssl) || |
| SSL_CIPHER_get_max_version(cipher) < ssl3_protocol_version(ssl) || |
| !sk_SSL_CIPHER_find(ssl_get_ciphers_by_id(ssl), NULL, cipher)) { |
| OPENSSL_PUT_ERROR(SSL, SSL_R_WRONG_CIPHER_RETURNED); |
| ssl3_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_ILLEGAL_PARAMETER); |
| return ssl_hs_error; |
| } |
| } else { |
| uint16_t resumption_cipher; |
| if (!ssl_cipher_get_ecdhe_psk_cipher(ssl->s3->new_session->cipher, |
| &resumption_cipher) || |
| resumption_cipher != ssl_cipher_get_value(cipher)) { |
| OPENSSL_PUT_ERROR(SSL, SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED); |
| ssl3_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_ILLEGAL_PARAMETER); |
| return ssl_hs_error; |
| } |
| } |
| |
| ssl->s3->new_session->cipher = cipher; |
| ssl->s3->tmp.new_cipher = cipher; |
| |
| /* The PRF hash is now known. Set up the key schedule. */ |
| static const uint8_t kZeroes[EVP_MAX_MD_SIZE] = {0}; |
| size_t resumption_ctx_len = |
| EVP_MD_size(ssl_get_handshake_digest(ssl_get_algorithm_prf(ssl))); |
| if (ssl->s3->session_reused) { |
| uint8_t resumption_ctx[EVP_MAX_MD_SIZE]; |
| if (!tls13_resumption_context(ssl, resumption_ctx, resumption_ctx_len, |
| ssl->s3->new_session) || |
| !tls13_init_key_schedule(ssl, resumption_ctx, resumption_ctx_len)) { |
| return ssl_hs_error; |
| } |
| } else if (!tls13_init_key_schedule(ssl, kZeroes, resumption_ctx_len)) { |
| return ssl_hs_error; |
| } |
| |
| /* Resolve PSK and incorporate it into the secret. */ |
| if (cipher->algorithm_auth == SSL_aPSK) { |
| if (!ssl->s3->session_reused) { |
| OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR); |
| return ssl_hs_error; |
| } |
| |
| uint8_t resumption_psk[EVP_MAX_MD_SIZE]; |
| if (!tls13_resumption_psk(ssl, resumption_psk, hs->hash_len, |
| ssl->s3->new_session) || |
| !tls13_advance_key_schedule(ssl, resumption_psk, hs->hash_len)) { |
| OPENSSL_PUT_ERROR(SSL, SSL_R_DECODE_ERROR); |
| ssl3_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
| return ssl_hs_error; |
| } |
| } else if (!tls13_advance_key_schedule(ssl, kZeroes, hs->hash_len)) { |
| return ssl_hs_error; |
| } |
| |
| /* Resolve ECDHE and incorporate it into the secret. */ |
| if (cipher->algorithm_mkey == SSL_kECDHE) { |
| if (!have_key_share) { |
| OPENSSL_PUT_ERROR(SSL, SSL_R_MISSING_KEY_SHARE); |
| ssl3_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_MISSING_EXTENSION); |
| return ssl_hs_error; |
| } |
| |
| uint8_t *dhe_secret; |
| size_t dhe_secret_len; |
| if (!ssl_ext_key_share_parse_serverhello(ssl, &dhe_secret, &dhe_secret_len, |
| &alert, &key_share)) { |
| ssl3_send_alert(ssl, SSL3_AL_FATAL, alert); |
| return ssl_hs_error; |
| } |
| |
| int ok = tls13_advance_key_schedule(ssl, dhe_secret, dhe_secret_len); |
| OPENSSL_free(dhe_secret); |
| if (!ok) { |
| return ssl_hs_error; |
| } |
| } else { |
| if (have_key_share) { |
| OPENSSL_PUT_ERROR(SSL, SSL_R_UNEXPECTED_EXTENSION); |
| ssl3_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_UNSUPPORTED_EXTENSION); |
| return ssl_hs_error; |
| } |
| if (!tls13_advance_key_schedule(ssl, kZeroes, hs->hash_len)) { |
| return ssl_hs_error; |
| } |
| } |
| |
| /* If there was no HelloRetryRequest, the version negotiation logic has |
| * already hashed the message. */ |
| if (ssl->s3->hs->retry_group != 0 && |
| !ssl->method->hash_current_message(ssl)) { |
| return ssl_hs_error; |
| } |
| |
| if (!tls13_set_handshake_traffic(ssl)) { |
| return ssl_hs_error; |
| } |
| |
| hs->state = state_process_encrypted_extensions; |
| return ssl_hs_read_message; |
| } |
| |
| static enum ssl_hs_wait_t do_process_encrypted_extensions(SSL *ssl, |
| SSL_HANDSHAKE *hs) { |
| if (!tls13_check_message_type(ssl, SSL3_MT_ENCRYPTED_EXTENSIONS)) { |
| return ssl_hs_error; |
| } |
| |
| CBS cbs; |
| CBS_init(&cbs, ssl->init_msg, ssl->init_num); |
| if (!ssl_parse_serverhello_tlsext(ssl, &cbs)) { |
| OPENSSL_PUT_ERROR(SSL, SSL_R_PARSE_TLSEXT); |
| return ssl_hs_error; |
| } |
| if (CBS_len(&cbs) != 0) { |
| OPENSSL_PUT_ERROR(SSL, SSL_R_DECODE_ERROR); |
| ssl3_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
| return ssl_hs_error; |
| } |
| |
| if (!ssl->method->hash_current_message(ssl)) { |
| return ssl_hs_error; |
| } |
| |
| hs->state = state_process_certificate_request; |
| return ssl_hs_read_message; |
| } |
| |
| static enum ssl_hs_wait_t do_process_certificate_request(SSL *ssl, |
| SSL_HANDSHAKE *hs) { |
| ssl->s3->tmp.cert_request = 0; |
| |
| /* CertificateRequest may only be sent in certificate-based ciphers. */ |
| if (!ssl_cipher_uses_certificate_auth(ssl->s3->tmp.new_cipher)) { |
| hs->state = state_process_server_finished; |
| return ssl_hs_ok; |
| } |
| |
| /* CertificateRequest is optional. */ |
| if (ssl->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST) { |
| hs->state = state_process_server_certificate; |
| return ssl_hs_ok; |
| } |
| |
| CBS cbs, context, supported_signature_algorithms; |
| CBS_init(&cbs, ssl->init_msg, ssl->init_num); |
| if (!CBS_get_u8_length_prefixed(&cbs, &context) || |
| /* The request context is always empty during the handshake. */ |
| CBS_len(&context) != 0 || |
| !CBS_get_u16_length_prefixed(&cbs, &supported_signature_algorithms) || |
| CBS_len(&supported_signature_algorithms) == 0 || |
| !tls1_parse_peer_sigalgs(ssl, &supported_signature_algorithms)) { |
| ssl3_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
| OPENSSL_PUT_ERROR(SSL, SSL_R_DECODE_ERROR); |
| return ssl_hs_error; |
| } |
| |
| uint8_t alert; |
| STACK_OF(X509_NAME) *ca_sk = ssl_parse_client_CA_list(ssl, &alert, &cbs); |
| if (ca_sk == NULL) { |
| ssl3_send_alert(ssl, SSL3_AL_FATAL, alert); |
| return ssl_hs_error; |
| } |
| |
| /* Ignore extensions. */ |
| CBS extensions; |
| if (!CBS_get_u16_length_prefixed(&cbs, &extensions) || |
| CBS_len(&cbs) != 0) { |
| ssl3_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
| sk_X509_NAME_pop_free(ca_sk, X509_NAME_free); |
| OPENSSL_PUT_ERROR(SSL, SSL_R_DECODE_ERROR); |
| return ssl_hs_error; |
| } |
| |
| ssl->s3->tmp.cert_request = 1; |
| sk_X509_NAME_pop_free(ssl->s3->tmp.ca_names, X509_NAME_free); |
| ssl->s3->tmp.ca_names = ca_sk; |
| |
| if (!ssl->method->hash_current_message(ssl)) { |
| return ssl_hs_error; |
| } |
| |
| hs->state = state_process_server_certificate; |
| return ssl_hs_read_message; |
| } |
| |
| static enum ssl_hs_wait_t do_process_server_certificate(SSL *ssl, |
| SSL_HANDSHAKE *hs) { |
| if (!tls13_check_message_type(ssl, SSL3_MT_CERTIFICATE) || |
| !tls13_process_certificate(ssl, 0 /* certificate required */) || |
| !ssl->method->hash_current_message(ssl)) { |
| return ssl_hs_error; |
| } |
| |
| /* Check the certificate matches the cipher suite. |
| * |
| * TODO(davidben): Remove this check when switching to the new TLS 1.3 cipher |
| * suite negotiation. */ |
| if (!ssl_check_leaf_certificate(ssl, ssl->s3->new_session->peer)) { |
| ssl3_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_ILLEGAL_PARAMETER); |
| return ssl_hs_error; |
| } |
| |
| hs->state = state_process_server_certificate_verify; |
| return ssl_hs_read_message; |
| } |
| |
| static enum ssl_hs_wait_t do_process_server_certificate_verify( |
| SSL *ssl, SSL_HANDSHAKE *hs) { |
| if (!tls13_check_message_type(ssl, SSL3_MT_CERTIFICATE_VERIFY) || |
| !tls13_process_certificate_verify(ssl) || |
| !ssl->method->hash_current_message(ssl)) { |
| return 0; |
| } |
| |
| hs->state = state_process_server_finished; |
| return ssl_hs_read_message; |
| } |
| |
| static enum ssl_hs_wait_t do_process_server_finished(SSL *ssl, |
| SSL_HANDSHAKE *hs) { |
| static const uint8_t kZeroes[EVP_MAX_MD_SIZE] = {0}; |
| |
| if (!tls13_check_message_type(ssl, SSL3_MT_FINISHED) || |
| !tls13_process_finished(ssl) || |
| !ssl->method->hash_current_message(ssl) || |
| /* Update the secret to the master secret and derive traffic keys. */ |
| !tls13_advance_key_schedule(ssl, kZeroes, hs->hash_len) || |
| !tls13_derive_traffic_secret_0(ssl)) { |
| return ssl_hs_error; |
| } |
| |
| ssl->method->received_flight(ssl); |
| hs->state = state_certificate_callback; |
| return ssl_hs_ok; |
| } |
| |
| static enum ssl_hs_wait_t do_certificate_callback(SSL *ssl, SSL_HANDSHAKE *hs) { |
| /* The peer didn't request a certificate. */ |
| if (!ssl->s3->tmp.cert_request) { |
| hs->state = state_send_client_finished; |
| return ssl_hs_ok; |
| } |
| |
| /* Call cert_cb to update the certificate. */ |
| if (ssl->cert->cert_cb != NULL) { |
| int rv = ssl->cert->cert_cb(ssl, ssl->cert->cert_cb_arg); |
| if (rv == 0) { |
| ssl3_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); |
| OPENSSL_PUT_ERROR(SSL, SSL_R_CERT_CB_ERROR); |
| return ssl_hs_error; |
| } |
| if (rv < 0) { |
| hs->state = state_certificate_callback; |
| return ssl_hs_x509_lookup; |
| } |
| } |
| |
| hs->state = state_send_client_certificate; |
| return ssl_hs_ok; |
| } |
| |
| static enum ssl_hs_wait_t do_send_client_certificate(SSL *ssl, |
| SSL_HANDSHAKE *hs) { |
| /* Call client_cert_cb to update the certificate. */ |
| int should_retry; |
| if (!ssl_do_client_cert_cb(ssl, &should_retry)) { |
| if (should_retry) { |
| hs->state = state_send_client_certificate; |
| return ssl_hs_x509_lookup; |
| } |
| return ssl_hs_error; |
| } |
| |
| if (!tls13_prepare_certificate(ssl)) { |
| return ssl_hs_error; |
| } |
| |
| hs->state = state_send_client_certificate_verify; |
| return ssl_hs_write_message; |
| } |
| |
| static enum ssl_hs_wait_t do_send_client_certificate_verify(SSL *ssl, |
| SSL_HANDSHAKE *hs, |
| int is_first_run) { |
| /* Don't send CertificateVerify if there is no certificate. */ |
| if (!ssl_has_certificate(ssl)) { |
| hs->state = state_send_client_finished; |
| return ssl_hs_ok; |
| } |
| |
| switch (tls13_prepare_certificate_verify(ssl, is_first_run)) { |
| case ssl_private_key_success: |
| hs->state = state_send_client_finished; |
| return ssl_hs_write_message; |
| |
| case ssl_private_key_retry: |
| hs->state = state_complete_client_certificate_verify; |
| return ssl_hs_private_key_operation; |
| |
| case ssl_private_key_failure: |
| return ssl_hs_error; |
| } |
| |
| assert(0); |
| return ssl_hs_error; |
| } |
| |
| static enum ssl_hs_wait_t do_send_client_finished(SSL *ssl, SSL_HANDSHAKE *hs) { |
| if (!tls13_prepare_finished(ssl)) { |
| return ssl_hs_error; |
| } |
| |
| hs->state = state_flush; |
| return ssl_hs_write_message; |
| } |
| |
| static enum ssl_hs_wait_t do_flush(SSL *ssl, SSL_HANDSHAKE *hs) { |
| if (!tls13_set_traffic_key(ssl, type_data, evp_aead_open, |
| hs->traffic_secret_0, hs->hash_len) || |
| !tls13_set_traffic_key(ssl, type_data, evp_aead_seal, |
| hs->traffic_secret_0, hs->hash_len) || |
| !tls13_finalize_keys(ssl)) { |
| return ssl_hs_error; |
| } |
| |
| hs->state = state_done; |
| return ssl_hs_flush; |
| } |
| |
| enum ssl_hs_wait_t tls13_client_handshake(SSL *ssl) { |
| SSL_HANDSHAKE *hs = ssl->s3->hs; |
| |
| while (hs->state != state_done) { |
| enum ssl_hs_wait_t ret = ssl_hs_error; |
| enum client_hs_state_t state = hs->state; |
| switch (state) { |
| case state_process_hello_retry_request: |
| ret = do_process_hello_retry_request(ssl, hs); |
| break; |
| case state_send_second_client_hello: |
| ret = do_send_second_client_hello(ssl, hs); |
| break; |
| case state_flush_second_client_hello: |
| ret = do_flush_second_client_hello(ssl, hs); |
| break; |
| case state_process_server_hello: |
| ret = do_process_server_hello(ssl, hs); |
| break; |
| case state_process_encrypted_extensions: |
| ret = do_process_encrypted_extensions(ssl, hs); |
| break; |
| case state_process_certificate_request: |
| ret = do_process_certificate_request(ssl, hs); |
| break; |
| case state_process_server_certificate: |
| ret = do_process_server_certificate(ssl, hs); |
| break; |
| case state_process_server_certificate_verify: |
| ret = do_process_server_certificate_verify(ssl, hs); |
| break; |
| case state_process_server_finished: |
| ret = do_process_server_finished(ssl, hs); |
| break; |
| case state_certificate_callback: |
| ret = do_certificate_callback(ssl, hs); |
| break; |
| case state_send_client_certificate: |
| ret = do_send_client_certificate(ssl, hs); |
| break; |
| case state_send_client_certificate_verify: |
| ret = do_send_client_certificate_verify(ssl, hs, 1 /* first run */); |
| break; |
| case state_complete_client_certificate_verify: |
| ret = do_send_client_certificate_verify(ssl, hs, 0 /* complete */); |
| break; |
| case state_send_client_finished: |
| ret = do_send_client_finished(ssl, hs); |
| break; |
| case state_flush: |
| ret = do_flush(ssl, hs); |
| break; |
| case state_done: |
| ret = ssl_hs_ok; |
| break; |
| } |
| |
| if (ret != ssl_hs_ok) { |
| return ret; |
| } |
| } |
| |
| return ssl_hs_ok; |
| } |
| |
| int tls13_process_new_session_ticket(SSL *ssl) { |
| SSL_SESSION *session = |
| SSL_SESSION_dup(ssl->s3->established_session, |
| SSL_SESSION_INCLUDE_NONAUTH); |
| if (session == NULL) { |
| return 0; |
| } |
| |
| CBS cbs, extensions, ticket; |
| CBS_init(&cbs, ssl->init_msg, ssl->init_num); |
| if (!CBS_get_u32(&cbs, &session->tlsext_tick_lifetime_hint) || |
| !CBS_get_u32(&cbs, &session->ticket_flags) || |
| !CBS_get_u32(&cbs, &session->ticket_age_add) || |
| !CBS_get_u16_length_prefixed(&cbs, &extensions) || |
| !CBS_get_u16_length_prefixed(&cbs, &ticket) || |
| !CBS_stow(&ticket, &session->tlsext_tick, &session->tlsext_ticklen) || |
| CBS_len(&cbs) != 0) { |
| SSL_SESSION_free(session); |
| ssl3_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
| OPENSSL_PUT_ERROR(SSL, SSL_R_DECODE_ERROR); |
| return 0; |
| } |
| |
| session->ticket_age_add_valid = 1; |
| session->not_resumable = 0; |
| |
| if (ssl->ctx->new_session_cb != NULL && |
| ssl->ctx->new_session_cb(ssl, session)) { |
| /* |new_session_cb|'s return value signals that it took ownership. */ |
| return 1; |
| } |
| |
| SSL_SESSION_free(session); |
| return 1; |
| } |