| // Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // https://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| #include <openssl/ssl.h> |
| |
| #include <assert.h> |
| #include <string.h> |
| |
| #include <openssl/err.h> |
| |
| #include "../crypto/internal.h" |
| #include "internal.h" |
| |
| |
| BSSL_NAMESPACE_BEGIN |
| |
| static void tls_on_handshake_complete(SSL *ssl) { |
| // The handshake should have released its final message. |
| assert(!ssl->s3->has_message); |
| |
| // During the handshake, |hs_buf| is retained. Release if it there is no |
| // excess in it. There should not be any excess because the handshake logic |
| // rejects unprocessed data after each Finished message. Note this means we do |
| // not allow a TLS 1.2 HelloRequest to be packed into the same record as |
| // Finished. (Schannel also rejects this.) |
| assert(!ssl->s3->hs_buf || ssl->s3->hs_buf->length == 0); |
| if (ssl->s3->hs_buf && ssl->s3->hs_buf->length == 0) { |
| ssl->s3->hs_buf.reset(); |
| } |
| } |
| |
| static bool tls_set_read_state(SSL *ssl, ssl_encryption_level_t level, |
| UniquePtr<SSLAEADContext> aead_ctx, |
| Span<const uint8_t> traffic_secret) { |
| // Cipher changes are forbidden if the current epoch has leftover data. |
| if (tls_has_unprocessed_handshake_data(ssl)) { |
| OPENSSL_PUT_ERROR(SSL, SSL_R_EXCESS_HANDSHAKE_DATA); |
| ssl_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_UNEXPECTED_MESSAGE); |
| return false; |
| } |
| |
| if (SSL_is_quic(ssl)) { |
| if ((ssl->s3->hs == nullptr || !ssl->s3->hs->hints_requested) && |
| !ssl->quic_method->set_read_secret(ssl, level, aead_ctx->cipher(), |
| traffic_secret.data(), |
| traffic_secret.size())) { |
| return false; |
| } |
| |
| // QUIC only uses |ssl| for handshake messages, which never use early data |
| // keys, so we return without installing anything. This avoids needing to |
| // have two secrets active at once in 0-RTT. |
| if (level == ssl_encryption_early_data) { |
| return true; |
| } |
| ssl->s3->quic_read_level = level; |
| } |
| |
| ssl->s3->read_sequence = 0; |
| ssl->s3->aead_read_ctx = std::move(aead_ctx); |
| return true; |
| } |
| |
| static bool tls_set_write_state(SSL *ssl, ssl_encryption_level_t level, |
| UniquePtr<SSLAEADContext> aead_ctx, |
| Span<const uint8_t> traffic_secret) { |
| if (!tls_flush_pending_hs_data(ssl)) { |
| return false; |
| } |
| |
| if (SSL_is_quic(ssl)) { |
| if ((ssl->s3->hs == nullptr || !ssl->s3->hs->hints_requested) && |
| !ssl->quic_method->set_write_secret(ssl, level, aead_ctx->cipher(), |
| traffic_secret.data(), |
| traffic_secret.size())) { |
| return false; |
| } |
| |
| // QUIC only uses |ssl| for handshake messages, which never use early data |
| // keys, so we return without installing anything. This avoids needing to |
| // have two secrets active at once in 0-RTT. |
| if (level == ssl_encryption_early_data) { |
| return true; |
| } |
| ssl->s3->quic_write_level = level; |
| } |
| |
| ssl->s3->write_sequence = 0; |
| ssl->s3->aead_write_ctx = std::move(aead_ctx); |
| return true; |
| } |
| |
| static void tls_finish_flight(SSL *ssl) { |
| // We don't track whether a flight is complete in TLS and instead always flush |
| // every queued message in |tls_flush|, whether the flight is complete or not. |
| } |
| |
| static void tls_schedule_ack(SSL *ssl) { |
| // TLS does not use ACKs. |
| } |
| |
| static const SSL_PROTOCOL_METHOD kTLSProtocolMethod = { |
| false /* is_dtls */, |
| tls_new, |
| tls_free, |
| tls_get_message, |
| tls_next_message, |
| tls_has_unprocessed_handshake_data, |
| tls_open_handshake, |
| tls_open_change_cipher_spec, |
| tls_open_app_data, |
| tls_write_app_data, |
| tls_dispatch_alert, |
| tls_init_message, |
| tls_finish_message, |
| tls_add_message, |
| tls_add_change_cipher_spec, |
| tls_finish_flight, |
| tls_schedule_ack, |
| tls_flush, |
| tls_on_handshake_complete, |
| tls_set_read_state, |
| tls_set_write_state, |
| }; |
| |
| static bool ssl_noop_x509_check_client_CA_names( |
| STACK_OF(CRYPTO_BUFFER) *names) { |
| return true; |
| } |
| |
| static void ssl_noop_x509_clear(CERT *cert) {} |
| static void ssl_noop_x509_free(CERT *cert) {} |
| static void ssl_noop_x509_dup(CERT *new_cert, const CERT *cert) {} |
| static void ssl_noop_x509_flush_cached_leaf(CERT *cert) {} |
| static void ssl_noop_x509_flush_cached_chain(CERT *cert) {} |
| static bool ssl_noop_x509_session_cache_objects(SSL_SESSION *sess) { |
| return true; |
| } |
| static bool ssl_noop_x509_session_dup(SSL_SESSION *new_session, |
| const SSL_SESSION *session) { |
| return true; |
| } |
| static void ssl_noop_x509_session_clear(SSL_SESSION *session) {} |
| static bool ssl_noop_x509_session_verify_cert_chain(SSL_SESSION *session, |
| SSL_HANDSHAKE *hs, |
| uint8_t *out_alert) { |
| return false; |
| } |
| |
| static void ssl_noop_x509_hs_flush_cached_ca_names(SSL_HANDSHAKE *hs) {} |
| static bool ssl_noop_x509_ssl_new(SSL_HANDSHAKE *hs) { return true; } |
| static void ssl_noop_x509_ssl_config_free(SSL_CONFIG *cfg) {} |
| static void ssl_noop_x509_ssl_flush_cached_client_CA(SSL_CONFIG *cfg) {} |
| static bool ssl_noop_x509_ssl_auto_chain_if_needed(SSL_HANDSHAKE *hs) { |
| return true; |
| } |
| static bool ssl_noop_x509_ssl_ctx_new(SSL_CTX *ctx) { return true; } |
| static void ssl_noop_x509_ssl_ctx_free(SSL_CTX *ctx) {} |
| static void ssl_noop_x509_ssl_ctx_flush_cached_client_CA(SSL_CTX *ctx) {} |
| |
| const SSL_X509_METHOD ssl_noop_x509_method = { |
| ssl_noop_x509_check_client_CA_names, |
| ssl_noop_x509_clear, |
| ssl_noop_x509_free, |
| ssl_noop_x509_dup, |
| ssl_noop_x509_flush_cached_chain, |
| ssl_noop_x509_flush_cached_leaf, |
| ssl_noop_x509_session_cache_objects, |
| ssl_noop_x509_session_dup, |
| ssl_noop_x509_session_clear, |
| ssl_noop_x509_session_verify_cert_chain, |
| ssl_noop_x509_hs_flush_cached_ca_names, |
| ssl_noop_x509_ssl_new, |
| ssl_noop_x509_ssl_config_free, |
| ssl_noop_x509_ssl_flush_cached_client_CA, |
| ssl_noop_x509_ssl_auto_chain_if_needed, |
| ssl_noop_x509_ssl_ctx_new, |
| ssl_noop_x509_ssl_ctx_free, |
| ssl_noop_x509_ssl_ctx_flush_cached_client_CA, |
| }; |
| |
| BSSL_NAMESPACE_END |
| |
| using namespace bssl; |
| |
| const SSL_METHOD *TLS_method(void) { |
| static const SSL_METHOD kMethod = { |
| 0, |
| &kTLSProtocolMethod, |
| &ssl_crypto_x509_method, |
| }; |
| return &kMethod; |
| } |
| |
| const SSL_METHOD *SSLv23_method(void) { return TLS_method(); } |
| |
| const SSL_METHOD *TLS_with_buffers_method(void) { |
| static const SSL_METHOD kMethod = { |
| 0, |
| &kTLSProtocolMethod, |
| &ssl_noop_x509_method, |
| }; |
| return &kMethod; |
| } |
| |
| // Legacy version-locked methods. |
| |
| const SSL_METHOD *TLSv1_2_method(void) { |
| static const SSL_METHOD kMethod = { |
| TLS1_2_VERSION, |
| &kTLSProtocolMethod, |
| &ssl_crypto_x509_method, |
| }; |
| return &kMethod; |
| } |
| |
| const SSL_METHOD *TLSv1_1_method(void) { |
| static const SSL_METHOD kMethod = { |
| TLS1_1_VERSION, |
| &kTLSProtocolMethod, |
| &ssl_crypto_x509_method, |
| }; |
| return &kMethod; |
| } |
| |
| const SSL_METHOD *TLSv1_method(void) { |
| static const SSL_METHOD kMethod = { |
| TLS1_VERSION, |
| &kTLSProtocolMethod, |
| &ssl_crypto_x509_method, |
| }; |
| return &kMethod; |
| } |
| |
| // Legacy side-specific methods. |
| |
| const SSL_METHOD *TLSv1_2_server_method(void) { return TLSv1_2_method(); } |
| |
| const SSL_METHOD *TLSv1_1_server_method(void) { return TLSv1_1_method(); } |
| |
| const SSL_METHOD *TLSv1_server_method(void) { return TLSv1_method(); } |
| |
| const SSL_METHOD *TLSv1_2_client_method(void) { return TLSv1_2_method(); } |
| |
| const SSL_METHOD *TLSv1_1_client_method(void) { return TLSv1_1_method(); } |
| |
| const SSL_METHOD *TLSv1_client_method(void) { return TLSv1_method(); } |
| |
| const SSL_METHOD *SSLv23_server_method(void) { return SSLv23_method(); } |
| |
| const SSL_METHOD *SSLv23_client_method(void) { return SSLv23_method(); } |
| |
| const SSL_METHOD *TLS_server_method(void) { return TLS_method(); } |
| |
| const SSL_METHOD *TLS_client_method(void) { return TLS_method(); } |