/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) * All rights reserved. * * This package is an SSL implementation written * by Eric Young (eay@cryptsoft.com). * The implementation was written so as to conform with Netscapes SSL. * * This library is free for commercial and non-commercial use as long as * the following conditions are aheared to. The following conditions * apply to all code found in this distribution, be it the RC4, RSA, * lhash, DES, etc., code; not just the SSL code. The SSL documentation * included with this distribution is covered by the same copyright terms * except that the holder is Tim Hudson (tjh@cryptsoft.com). * * Copyright remains Eric Young's, and as such any Copyright notices in * the code are not to be removed. * If this package is used in a product, Eric Young should be given attribution * as the author of the parts of the library used. * This can be in the form of a textual message at program startup or * in documentation (online or textual) provided with the package. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * "This product includes cryptographic software written by * Eric Young (eay@cryptsoft.com)" * The word 'cryptographic' can be left out if the rouines from the library * being used are not cryptographic related :-). * 4. If you include any Windows specific code (or a derivative thereof) from * the apps directory (application code) you must include an acknowledgement: * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" * * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * The licence and distribution terms for any publically available version or * derivative of this code cannot be changed. i.e. this code cannot simply be * copied and put under another distribution licence * [including the GNU Public Licence.] */ #include <openssl_grpc/ssl.h> #include <assert.h> #include <string.h> #include <openssl_grpc/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> secret_for_quic) { // 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->quic_method != nullptr) { if ((ssl->s3->hs == nullptr || !ssl->s3->hs->hints_requested) && !ssl->quic_method->set_read_secret(ssl, level, aead_ctx->cipher(), secret_for_quic.data(), secret_for_quic.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; } } OPENSSL_memset(ssl->s3->read_sequence, 0, sizeof(ssl->s3->read_sequence)); ssl->s3->aead_read_ctx = std::move(aead_ctx); ssl->s3->read_level = level; return true; } static bool tls_set_write_state(SSL *ssl, ssl_encryption_level_t level, UniquePtr<SSLAEADContext> aead_ctx, Span<const uint8_t> secret_for_quic) { if (!tls_flush_pending_hs_data(ssl)) { return false; } if (ssl->quic_method != nullptr) { if ((ssl->s3->hs == nullptr || !ssl->s3->hs->hints_requested) && !ssl->quic_method->set_write_secret(ssl, level, aead_ctx->cipher(), secret_for_quic.data(), secret_for_quic.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; } } OPENSSL_memset(ssl->s3->write_sequence, 0, sizeof(ssl->s3->write_sequence)); ssl->s3->aead_write_ctx = std::move(aead_ctx); ssl->s3->write_level = level; return true; } 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_flush_flight, 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(); }