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; }
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_client_hello(SSL *ssl, SSL_HANDSHAKE *hs) { if (!tls13_check_message_type(ssl, SSL3_MT_CLIENT_HELLO)) { return ssl_hs_error; } struct ssl_early_callback_ctx client_hello; if (!ssl_early_callback_init(ssl, &client_hello, ssl->init_msg, ssl->init_num)) { OPENSSL_PUT_ERROR(SSL, SSL_R_CLIENTHELLO_PARSE_FAILED); ssl3_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); return ssl_hs_error; } assert(ssl->s3->have_version); /* Load the client random. */ if (client_hello.random_len != SSL3_RANDOM_SIZE) { OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR); return -1; } memcpy(ssl->s3->client_random, client_hello.random, client_hello.random_len); uint8_t alert = SSL_AD_DECODE_ERROR; SSL_SESSION *session = NULL; CBS pre_shared_key; if (ssl_early_callback_get_extension(&client_hello, &pre_shared_key, TLSEXT_TYPE_pre_shared_key) && !ssl_ext_pre_shared_key_parse_clienthello(ssl, &session, &alert, &pre_shared_key)) { ssl3_send_alert(ssl, SSL3_AL_FATAL, alert); return 0; } uint16_t resumption_cipher; if (session != NULL && /* We currently only support ECDHE-PSK resumption. */ ((session->ticket_flags & SSL_TICKET_ALLOW_DHE_RESUMPTION) == 0 || /* Only resume if the session's version matches. */ session->ssl_version != ssl->version || !ssl_cipher_get_ecdhe_psk_cipher(session->cipher, &resumption_cipher) || !ssl_client_cipher_list_contains_cipher(&client_hello, resumption_cipher))) { SSL_SESSION_free(session); session = NULL; } if (session == NULL) { if (!ssl_get_new_session(ssl, 1 /* server */)) { ssl3_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); return ssl_hs_error; } } else { /* Only authentication information carries over in TLS 1.3. */ ssl->s3->new_session = SSL_SESSION_dup(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->s3->session_reused = 1; SSL_SESSION_free(session); } if (ssl->ctx->dos_protection_cb != NULL && ssl->ctx->dos_protection_cb(&client_hello) == 0) { /* Connection rejected for DOS reasons. */ OPENSSL_PUT_ERROR(SSL, SSL_R_CONNECTION_REJECTED); ssl3_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); return ssl_hs_error; } /* TLS 1.3 requires the peer only advertise the null compression. */ if (client_hello.compression_methods_len != 1 || client_hello.compression_methods[0] != 0) { OPENSSL_PUT_ERROR(SSL, SSL_R_INVALID_COMPRESSION_LIST); ssl3_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_ILLEGAL_PARAMETER); return ssl_hs_error; } /* TLS extensions. */ if (!ssl_parse_clienthello_tlsext(ssl, &client_hello)) { OPENSSL_PUT_ERROR(SSL, SSL_R_PARSE_TLSEXT); return ssl_hs_error; } hs->state = state_select_parameters; return ssl_hs_ok; }
static enum ssl_hs_wait_t do_select_parameters(SSL_HANDSHAKE *hs) { SSL *const ssl = hs->ssl; /* The short record header extension is incompatible with early data. */ if (ssl->s3->skip_early_data && ssl->s3->short_header) { OPENSSL_PUT_ERROR(SSL, SSL_R_UNEXPECTED_EXTENSION); return ssl_hs_error; } SSL_CLIENT_HELLO client_hello; if (!ssl_client_hello_init(ssl, &client_hello, ssl->init_msg, ssl->init_num)) { OPENSSL_PUT_ERROR(SSL, SSL_R_CLIENTHELLO_PARSE_FAILED); ssl3_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); return ssl_hs_error; } /* Negotiate the cipher suite. */ ssl->s3->tmp.new_cipher = choose_tls13_cipher(ssl, &client_hello); if (ssl->s3->tmp.new_cipher == NULL) { OPENSSL_PUT_ERROR(SSL, SSL_R_NO_SHARED_CIPHER); ssl3_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); return ssl_hs_error; } /* Decode the ticket if we agree on a PSK key exchange mode. */ uint8_t alert = SSL_AD_DECODE_ERROR; SSL_SESSION *session = NULL; CBS pre_shared_key, binders; if (hs->accept_psk_mode && ssl_client_hello_get_extension(&client_hello, &pre_shared_key, TLSEXT_TYPE_pre_shared_key)) { /* Verify that the pre_shared_key extension is the last extension in * ClientHello. */ if (CBS_data(&pre_shared_key) + CBS_len(&pre_shared_key) != client_hello.extensions + client_hello.extensions_len) { OPENSSL_PUT_ERROR(SSL, SSL_R_PRE_SHARED_KEY_MUST_BE_LAST); ssl3_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_ILLEGAL_PARAMETER); return ssl_hs_error; } if (!ssl_ext_pre_shared_key_parse_clienthello(hs, &session, &binders, &alert, &pre_shared_key)) { ssl3_send_alert(ssl, SSL3_AL_FATAL, alert); return ssl_hs_error; } } if (session != NULL && !ssl_session_is_resumable(ssl, session)) { SSL_SESSION_free(session); session = NULL; } /* Set up the new session, either using the original one as a template or * creating a fresh one. */ if (session == NULL) { if (!ssl_get_new_session(hs, 1 /* server */)) { ssl3_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); return ssl_hs_error; } ssl->s3->new_session->cipher = ssl->s3->tmp.new_cipher; /* On new sessions, stash the SNI value in the session. */ if (hs->hostname != NULL) { OPENSSL_free(ssl->s3->new_session->tlsext_hostname); ssl->s3->new_session->tlsext_hostname = BUF_strdup(hs->hostname); if (ssl->s3->new_session->tlsext_hostname == NULL) { ssl3_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); return ssl_hs_error; } } } else { /* Check the PSK binder. */ if (!tls13_verify_psk_binder(ssl, session, &binders)) { SSL_SESSION_free(session); ssl3_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_DECRYPT_ERROR); return ssl_hs_error; } /* Only authentication information carries over in TLS 1.3. */ ssl->s3->new_session = SSL_SESSION_dup(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->s3->session_reused = 1; SSL_SESSION_free(session); /* Resumption incorporates fresh key material, so refresh the timeout. */ ssl_session_renew_timeout(ssl, ssl->s3->new_session, ssl->initial_ctx->session_psk_dhe_timeout); } if (ssl->ctx->dos_protection_cb != NULL && ssl->ctx->dos_protection_cb(&client_hello) == 0) { /* Connection rejected for DOS reasons. */ OPENSSL_PUT_ERROR(SSL, SSL_R_CONNECTION_REJECTED); ssl3_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); return ssl_hs_error; } /* HTTP/2 negotiation depends on the cipher suite, so ALPN negotiation was * deferred. Complete it now. */ if (!ssl_negotiate_alpn(hs, &alert, &client_hello)) { ssl3_send_alert(ssl, SSL3_AL_FATAL, alert); return ssl_hs_error; } /* The PRF hash is now known. Set up the key schedule and hash the * ClientHello. */ size_t hash_len = EVP_MD_size(ssl_get_handshake_digest(ssl_get_algorithm_prf(ssl))); if (!tls13_init_key_schedule(hs) || !ssl_hash_current_message(ssl)) { return ssl_hs_error; } /* Incorporate the PSK into the running secret. */ if (ssl->s3->session_reused) { if (!tls13_advance_key_schedule(hs, ssl->s3->new_session->master_key, ssl->s3->new_session->master_key_length)) { return ssl_hs_error; } } else if (!tls13_advance_key_schedule(hs, kZeroes, hash_len)) { return ssl_hs_error; } ssl->method->received_flight(ssl); /* Resolve ECDHE and incorporate it into the secret. */ int need_retry; if (!resolve_ecdhe_secret(hs, &need_retry, &client_hello)) { if (need_retry) { hs->tls13_state = state_send_hello_retry_request; return ssl_hs_ok; } return ssl_hs_error; } hs->tls13_state = state_send_server_hello; return ssl_hs_ok; }
static enum ssl_hs_wait_t do_select_session(SSL_HANDSHAKE *hs) { SSL *const ssl = hs->ssl; SSL_CLIENT_HELLO client_hello; if (!ssl_client_hello_init(ssl, &client_hello, ssl->init_msg, ssl->init_num)) { OPENSSL_PUT_ERROR(SSL, SSL_R_CLIENTHELLO_PARSE_FAILED); ssl3_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); return ssl_hs_error; } uint8_t alert = SSL_AD_DECODE_ERROR; SSL_SESSION *session = NULL; switch (select_session(hs, &alert, &session, &ssl->s3->ticket_age_skew, &client_hello)) { case ssl_ticket_aead_ignore_ticket: assert(session == NULL); if (!ssl_get_new_session(hs, 1 /* server */)) { ssl3_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); return ssl_hs_error; } break; case ssl_ticket_aead_success: /* Carry over authentication information from the previous handshake into * a fresh session. */ hs->new_session = SSL_SESSION_dup(session, SSL_SESSION_DUP_AUTH_ONLY); if (/* Early data must be acceptable for this ticket. */ ssl->cert->enable_early_data && session->ticket_max_early_data != 0 && /* The client must have offered early data. */ hs->early_data_offered && /* Channel ID is incompatible with 0-RTT. */ !ssl->s3->tlsext_channel_id_valid && /* The negotiated ALPN must match the one in the ticket. */ ssl->s3->alpn_selected_len == session->early_alpn_len && OPENSSL_memcmp(ssl->s3->alpn_selected, session->early_alpn, ssl->s3->alpn_selected_len) == 0) { ssl->early_data_accepted = 1; } SSL_SESSION_free(session); if (hs->new_session == NULL) { ssl3_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); return ssl_hs_error; } ssl->s3->session_reused = 1; /* Resumption incorporates fresh key material, so refresh the timeout. */ ssl_session_renew_timeout(ssl, hs->new_session, ssl->session_ctx->session_psk_dhe_timeout); break; case ssl_ticket_aead_error: ssl3_send_alert(ssl, SSL3_AL_FATAL, alert); return ssl_hs_error; case ssl_ticket_aead_retry: hs->tls13_state = state_select_session; return ssl_hs_pending_ticket; } /* Record connection properties in the new session. */ hs->new_session->cipher = hs->new_cipher; if (hs->hostname != NULL) { OPENSSL_free(hs->new_session->tlsext_hostname); hs->new_session->tlsext_hostname = BUF_strdup(hs->hostname); if (hs->new_session->tlsext_hostname == NULL) { ssl3_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); return ssl_hs_error; } } /* Store the initial negotiated ALPN in the session. */ if (ssl->s3->alpn_selected != NULL) { hs->new_session->early_alpn = BUF_memdup(ssl->s3->alpn_selected, ssl->s3->alpn_selected_len); if (hs->new_session->early_alpn == NULL) { ssl3_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); return ssl_hs_error; } hs->new_session->early_alpn_len = ssl->s3->alpn_selected_len; } if (ssl->ctx->dos_protection_cb != NULL && ssl->ctx->dos_protection_cb(&client_hello) == 0) { /* Connection rejected for DOS reasons. */ OPENSSL_PUT_ERROR(SSL, SSL_R_CONNECTION_REJECTED); ssl3_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); return ssl_hs_error; } /* Incorporate the PSK into the running secret. */ if (ssl->s3->session_reused) { if (!tls13_advance_key_schedule(hs, hs->new_session->master_key, hs->new_session->master_key_length)) { return ssl_hs_error; } } else if (!tls13_advance_key_schedule(hs, kZeroes, hs->hash_len)) { return ssl_hs_error; } if (ssl->early_data_accepted) { if (!tls13_derive_early_secrets(hs)) { return ssl_hs_error; } } else if (hs->early_data_offered) { ssl->s3->skip_early_data = 1; } ssl->method->received_flight(ssl); /* Resolve ECDHE and incorporate it into the secret. */ int need_retry; if (!resolve_ecdhe_secret(hs, &need_retry, &client_hello)) { if (need_retry) { ssl->early_data_accepted = 0; ssl->s3->skip_early_data = 1; hs->tls13_state = state_send_hello_retry_request; return ssl_hs_ok; } return ssl_hs_error; } hs->tls13_state = state_send_server_hello; return ssl_hs_ok; }