|
- /* 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;
- }
|