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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 00:47:55 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 00:47:55 +0000 |
commit | 26a029d407be480d791972afb5975cf62c9360a6 (patch) | |
tree | f435a8308119effd964b339f76abb83a57c29483 /third_party/libwebrtc/rtc_base/openssl_stream_adapter.cc | |
parent | Initial commit. (diff) | |
download | firefox-26a029d407be480d791972afb5975cf62c9360a6.tar.xz firefox-26a029d407be480d791972afb5975cf62c9360a6.zip |
Adding upstream version 124.0.1.upstream/124.0.1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'third_party/libwebrtc/rtc_base/openssl_stream_adapter.cc')
-rw-r--r-- | third_party/libwebrtc/rtc_base/openssl_stream_adapter.cc | 1305 |
1 files changed, 1305 insertions, 0 deletions
diff --git a/third_party/libwebrtc/rtc_base/openssl_stream_adapter.cc b/third_party/libwebrtc/rtc_base/openssl_stream_adapter.cc new file mode 100644 index 0000000000..353cbbe681 --- /dev/null +++ b/third_party/libwebrtc/rtc_base/openssl_stream_adapter.cc @@ -0,0 +1,1305 @@ +/* + * Copyright 2004 The WebRTC Project Authors. All rights reserved. + * + * Use of this source code is governed by a BSD-style license + * that can be found in the LICENSE file in the root of the source + * tree. An additional intellectual property rights grant can be found + * in the file PATENTS. All contributing project authors may + * be found in the AUTHORS file in the root of the source tree. + */ + +#include "rtc_base/openssl_stream_adapter.h" + +#include <openssl/bio.h> +#include <openssl/crypto.h> +#include <openssl/err.h> +#include <openssl/rand.h> +#include <openssl/tls1.h> +#include <openssl/x509v3.h> + +#include "absl/strings/string_view.h" +#ifndef OPENSSL_IS_BORINGSSL +#include <openssl/dtls1.h> +#include <openssl/ssl.h> +#endif + +#include <atomic> +#include <memory> +#include <utility> +#include <vector> + +#include "api/array_view.h" +#include "rtc_base/checks.h" +#include "rtc_base/logging.h" +#include "rtc_base/numerics/safe_conversions.h" +#include "rtc_base/openssl.h" +#include "rtc_base/openssl_adapter.h" +#include "rtc_base/openssl_digest.h" +#ifdef OPENSSL_IS_BORINGSSL +#include "rtc_base/boringssl_identity.h" +#else +#include "rtc_base/openssl_identity.h" +#endif +#include "rtc_base/openssl_utility.h" +#include "rtc_base/ssl_certificate.h" +#include "rtc_base/stream.h" +#include "rtc_base/string_encode.h" +#include "rtc_base/thread.h" +#include "rtc_base/time_utils.h" +#include "system_wrappers/include/field_trial.h" + +#if (OPENSSL_VERSION_NUMBER < 0x10100000L) +#error "webrtc requires at least OpenSSL version 1.1.0, to support DTLS-SRTP" +#endif + +// Defines for the TLS Cipher Suite Map. +#define DEFINE_CIPHER_ENTRY_SSL3(name) \ + { SSL3_CK_##name, "TLS_" #name } +#define DEFINE_CIPHER_ENTRY_TLS1(name) \ + { TLS1_CK_##name, "TLS_" #name } + +namespace rtc { +namespace { +using ::webrtc::SafeTask; +// SRTP cipher suite table. `internal_name` is used to construct a +// colon-separated profile strings which is needed by +// SSL_CTX_set_tlsext_use_srtp(). +struct SrtpCipherMapEntry { + const char* internal_name; + const int id; +}; + +// Cipher name table. Maps internal OpenSSL cipher ids to the RFC name. +struct SslCipherMapEntry { + uint32_t openssl_id; + const char* rfc_name; +}; + +// This isn't elegant, but it's better than an external reference +constexpr SrtpCipherMapEntry kSrtpCipherMap[] = { + {"SRTP_AES128_CM_SHA1_80", kSrtpAes128CmSha1_80}, + {"SRTP_AES128_CM_SHA1_32", kSrtpAes128CmSha1_32}, + {"SRTP_AEAD_AES_128_GCM", kSrtpAeadAes128Gcm}, + {"SRTP_AEAD_AES_256_GCM", kSrtpAeadAes256Gcm}}; + +#ifndef OPENSSL_IS_BORINGSSL +// The "SSL_CIPHER_standard_name" function is only available in OpenSSL when +// compiled with tracing, so we need to define the mapping manually here. +constexpr SslCipherMapEntry kSslCipherMap[] = { + // TLS v1.0 ciphersuites from RFC2246. + DEFINE_CIPHER_ENTRY_SSL3(RSA_RC4_128_SHA), + {SSL3_CK_RSA_DES_192_CBC3_SHA, "TLS_RSA_WITH_3DES_EDE_CBC_SHA"}, + + // AES ciphersuites from RFC3268. + {TLS1_CK_RSA_WITH_AES_128_SHA, "TLS_RSA_WITH_AES_128_CBC_SHA"}, + {TLS1_CK_DHE_RSA_WITH_AES_128_SHA, "TLS_DHE_RSA_WITH_AES_128_CBC_SHA"}, + {TLS1_CK_RSA_WITH_AES_256_SHA, "TLS_RSA_WITH_AES_256_CBC_SHA"}, + {TLS1_CK_DHE_RSA_WITH_AES_256_SHA, "TLS_DHE_RSA_WITH_AES_256_CBC_SHA"}, + + // ECC ciphersuites from RFC4492. + DEFINE_CIPHER_ENTRY_TLS1(ECDHE_ECDSA_WITH_RC4_128_SHA), + {TLS1_CK_ECDHE_ECDSA_WITH_DES_192_CBC3_SHA, + "TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA"}, + DEFINE_CIPHER_ENTRY_TLS1(ECDHE_ECDSA_WITH_AES_128_CBC_SHA), + DEFINE_CIPHER_ENTRY_TLS1(ECDHE_ECDSA_WITH_AES_256_CBC_SHA), + + DEFINE_CIPHER_ENTRY_TLS1(ECDHE_RSA_WITH_RC4_128_SHA), + {TLS1_CK_ECDHE_RSA_WITH_DES_192_CBC3_SHA, + "TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA"}, + DEFINE_CIPHER_ENTRY_TLS1(ECDHE_RSA_WITH_AES_128_CBC_SHA), + DEFINE_CIPHER_ENTRY_TLS1(ECDHE_RSA_WITH_AES_256_CBC_SHA), + + // TLS v1.2 ciphersuites. + {TLS1_CK_RSA_WITH_AES_128_SHA256, "TLS_RSA_WITH_AES_128_CBC_SHA256"}, + {TLS1_CK_RSA_WITH_AES_256_SHA256, "TLS_RSA_WITH_AES_256_CBC_SHA256"}, + {TLS1_CK_DHE_RSA_WITH_AES_128_SHA256, + "TLS_DHE_RSA_WITH_AES_128_CBC_SHA256"}, + {TLS1_CK_DHE_RSA_WITH_AES_256_SHA256, + "TLS_DHE_RSA_WITH_AES_256_CBC_SHA256"}, + + // TLS v1.2 GCM ciphersuites from RFC5288. + DEFINE_CIPHER_ENTRY_TLS1(RSA_WITH_AES_128_GCM_SHA256), + DEFINE_CIPHER_ENTRY_TLS1(RSA_WITH_AES_256_GCM_SHA384), + DEFINE_CIPHER_ENTRY_TLS1(DHE_RSA_WITH_AES_128_GCM_SHA256), + DEFINE_CIPHER_ENTRY_TLS1(DHE_RSA_WITH_AES_256_GCM_SHA384), + DEFINE_CIPHER_ENTRY_TLS1(DH_RSA_WITH_AES_128_GCM_SHA256), + DEFINE_CIPHER_ENTRY_TLS1(DH_RSA_WITH_AES_256_GCM_SHA384), + + // ECDH HMAC based ciphersuites from RFC5289. + {TLS1_CK_ECDHE_ECDSA_WITH_AES_128_SHA256, + "TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256"}, + {TLS1_CK_ECDHE_ECDSA_WITH_AES_256_SHA384, + "TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384"}, + {TLS1_CK_ECDHE_RSA_WITH_AES_128_SHA256, + "TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256"}, + {TLS1_CK_ECDHE_RSA_WITH_AES_256_SHA384, + "TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384"}, + + // ECDH GCM based ciphersuites from RFC5289. + DEFINE_CIPHER_ENTRY_TLS1(ECDHE_ECDSA_WITH_AES_128_GCM_SHA256), + DEFINE_CIPHER_ENTRY_TLS1(ECDHE_ECDSA_WITH_AES_256_GCM_SHA384), + DEFINE_CIPHER_ENTRY_TLS1(ECDHE_RSA_WITH_AES_128_GCM_SHA256), + DEFINE_CIPHER_ENTRY_TLS1(ECDHE_RSA_WITH_AES_256_GCM_SHA384), + + {0, nullptr}}; +#endif // #ifndef OPENSSL_IS_BORINGSSL + +#ifdef OPENSSL_IS_BORINGSSL +// Enabled by EnableTimeCallbackForTesting. Should never be set in production +// code. +bool g_use_time_callback_for_testing = false; +// Not used in production code. Actual time should be relative to Jan 1, 1970. +void TimeCallbackForTesting(const SSL* ssl, struct timeval* out_clock) { + int64_t time = TimeNanos(); + out_clock->tv_sec = time / kNumNanosecsPerSec; + out_clock->tv_usec = (time % kNumNanosecsPerSec) / kNumNanosecsPerMicrosec; +} +#endif + +} // namespace + +////////////////////////////////////////////////////////////////////// +// StreamBIO +////////////////////////////////////////////////////////////////////// + +static int stream_write(BIO* h, const char* buf, int num); +static int stream_read(BIO* h, char* buf, int size); +static int stream_puts(BIO* h, const char* str); +static long stream_ctrl(BIO* h, int cmd, long arg1, void* arg2); +static int stream_new(BIO* h); +static int stream_free(BIO* data); + +static BIO_METHOD* BIO_stream_method() { + static BIO_METHOD* method = [] { + BIO_METHOD* method = BIO_meth_new(BIO_TYPE_BIO, "stream"); + BIO_meth_set_write(method, stream_write); + BIO_meth_set_read(method, stream_read); + BIO_meth_set_puts(method, stream_puts); + BIO_meth_set_ctrl(method, stream_ctrl); + BIO_meth_set_create(method, stream_new); + BIO_meth_set_destroy(method, stream_free); + return method; + }(); + return method; +} + +static BIO* BIO_new_stream(StreamInterface* stream) { + BIO* ret = BIO_new(BIO_stream_method()); + if (ret == nullptr) { + return nullptr; + } + BIO_set_data(ret, stream); + return ret; +} + +// bio methods return 1 (or at least non-zero) on success and 0 on failure. + +static int stream_new(BIO* b) { + BIO_set_shutdown(b, 0); + BIO_set_init(b, 1); + BIO_set_data(b, 0); + return 1; +} + +static int stream_free(BIO* b) { + if (b == nullptr) { + return 0; + } + return 1; +} + +static int stream_read(BIO* b, char* out, int outl) { + if (!out) { + return -1; + } + StreamInterface* stream = static_cast<StreamInterface*>(BIO_get_data(b)); + BIO_clear_retry_flags(b); + size_t read; + int error; + StreamResult result = stream->Read( + rtc::MakeArrayView(reinterpret_cast<uint8_t*>(out), outl), read, error); + if (result == SR_SUCCESS) { + return checked_cast<int>(read); + } else if (result == SR_BLOCK) { + BIO_set_retry_read(b); + } + return -1; +} + +static int stream_write(BIO* b, const char* in, int inl) { + if (!in) { + return -1; + } + StreamInterface* stream = static_cast<StreamInterface*>(BIO_get_data(b)); + BIO_clear_retry_flags(b); + size_t written; + int error; + StreamResult result = stream->Write( + rtc::MakeArrayView(reinterpret_cast<const uint8_t*>(in), inl), written, + error); + if (result == SR_SUCCESS) { + return checked_cast<int>(written); + } else if (result == SR_BLOCK) { + BIO_set_retry_write(b); + } + return -1; +} + +static int stream_puts(BIO* b, const char* str) { + return stream_write(b, str, checked_cast<int>(strlen(str))); +} + +static long stream_ctrl(BIO* b, int cmd, long num, void* ptr) { + switch (cmd) { + case BIO_CTRL_RESET: + return 0; + case BIO_CTRL_EOF: { + StreamInterface* stream = static_cast<StreamInterface*>(ptr); + // 1 means end-of-stream. + return (stream->GetState() == SS_CLOSED) ? 1 : 0; + } + case BIO_CTRL_WPENDING: + case BIO_CTRL_PENDING: + return 0; + case BIO_CTRL_FLUSH: + return 1; + case BIO_CTRL_DGRAM_QUERY_MTU: + // openssl defaults to mtu=256 unless we return something here. + // The handshake doesn't actually need to send packets above 1k, + // so this seems like a sensible value that should work in most cases. + // Webrtc uses the same value for video packets. + return 1200; + default: + return 0; + } +} + +///////////////////////////////////////////////////////////////////////////// +// OpenSSLStreamAdapter +///////////////////////////////////////////////////////////////////////////// + +static std::atomic<bool> g_use_legacy_tls_protocols_override(false); +static std::atomic<bool> g_allow_legacy_tls_protocols(false); + +void SetAllowLegacyTLSProtocols(const absl::optional<bool>& allow) { + g_use_legacy_tls_protocols_override.store(allow.has_value()); + if (allow.has_value()) + g_allow_legacy_tls_protocols.store(allow.value()); +} + +bool ShouldAllowLegacyTLSProtocols() { + return g_use_legacy_tls_protocols_override.load() + ? g_allow_legacy_tls_protocols.load() + : webrtc::field_trial::IsEnabled("WebRTC-LegacyTlsProtocols"); +} + +OpenSSLStreamAdapter::OpenSSLStreamAdapter( + std::unique_ptr<StreamInterface> stream, + absl::AnyInvocable<void(SSLHandshakeError)> handshake_error) + : stream_(std::move(stream)), + handshake_error_(std::move(handshake_error)), + owner_(rtc::Thread::Current()), + state_(SSL_NONE), + role_(SSL_CLIENT), + ssl_read_needs_write_(false), + ssl_write_needs_read_(false), + ssl_(nullptr), + ssl_ctx_(nullptr), + ssl_mode_(SSL_MODE_TLS), + ssl_max_version_(SSL_PROTOCOL_TLS_12), + // Default is to support legacy TLS protocols. + // This will be changed to default non-support in M82 or M83. + support_legacy_tls_protocols_flag_(ShouldAllowLegacyTLSProtocols()) { + stream_->SignalEvent.connect(this, &OpenSSLStreamAdapter::OnEvent); +} + +OpenSSLStreamAdapter::~OpenSSLStreamAdapter() { + timeout_task_.Stop(); + Cleanup(0); +} + +void OpenSSLStreamAdapter::SetIdentity(std::unique_ptr<SSLIdentity> identity) { + RTC_DCHECK(!identity_); +#ifdef OPENSSL_IS_BORINGSSL + identity_.reset(static_cast<BoringSSLIdentity*>(identity.release())); +#else + identity_.reset(static_cast<OpenSSLIdentity*>(identity.release())); +#endif +} + +SSLIdentity* OpenSSLStreamAdapter::GetIdentityForTesting() const { + return identity_.get(); +} + +void OpenSSLStreamAdapter::SetServerRole(SSLRole role) { + role_ = role; +} + +bool OpenSSLStreamAdapter::SetPeerCertificateDigest( + absl::string_view digest_alg, + const unsigned char* digest_val, + size_t digest_len, + SSLPeerCertificateDigestError* error) { + RTC_DCHECK(!peer_certificate_verified_); + RTC_DCHECK(!HasPeerCertificateDigest()); + size_t expected_len; + if (error) { + *error = SSLPeerCertificateDigestError::NONE; + } + + if (!OpenSSLDigest::GetDigestSize(digest_alg, &expected_len)) { + RTC_LOG(LS_WARNING) << "Unknown digest algorithm: " << digest_alg; + if (error) { + *error = SSLPeerCertificateDigestError::UNKNOWN_ALGORITHM; + } + return false; + } + if (expected_len != digest_len) { + if (error) { + *error = SSLPeerCertificateDigestError::INVALID_LENGTH; + } + return false; + } + + peer_certificate_digest_value_.SetData(digest_val, digest_len); + peer_certificate_digest_algorithm_ = std::string(digest_alg); + + if (!peer_cert_chain_) { + // Normal case, where the digest is set before we obtain the certificate + // from the handshake. + return true; + } + + if (!VerifyPeerCertificate()) { + Error("SetPeerCertificateDigest", -1, SSL_AD_BAD_CERTIFICATE, false); + if (error) { + *error = SSLPeerCertificateDigestError::VERIFICATION_FAILED; + } + return false; + } + + if (state_ == SSL_CONNECTED) { + // Post the event asynchronously to unwind the stack. The caller + // of ContinueSSL may be the same object listening for these + // events and may not be prepared for reentrancy. + PostEvent(SE_OPEN | SE_READ | SE_WRITE, 0); + } + + return true; +} + +std::string OpenSSLStreamAdapter::SslCipherSuiteToName(int cipher_suite) { +#ifdef OPENSSL_IS_BORINGSSL + const SSL_CIPHER* ssl_cipher = SSL_get_cipher_by_value(cipher_suite); + if (!ssl_cipher) { + return std::string(); + } + return SSL_CIPHER_standard_name(ssl_cipher); +#else + const int openssl_cipher_id = 0x03000000L | cipher_suite; + for (const SslCipherMapEntry* entry = kSslCipherMap; entry->rfc_name; + ++entry) { + if (openssl_cipher_id == static_cast<int>(entry->openssl_id)) { + return entry->rfc_name; + } + } + return std::string(); +#endif +} + +bool OpenSSLStreamAdapter::GetSslCipherSuite(int* cipher_suite) { + if (state_ != SSL_CONNECTED) { + return false; + } + + const SSL_CIPHER* current_cipher = SSL_get_current_cipher(ssl_); + if (current_cipher == nullptr) { + return false; + } + + *cipher_suite = static_cast<uint16_t>(SSL_CIPHER_get_id(current_cipher)); + return true; +} + +SSLProtocolVersion OpenSSLStreamAdapter::GetSslVersion() const { + if (state_ != SSL_CONNECTED) { + return SSL_PROTOCOL_NOT_GIVEN; + } + + int ssl_version = SSL_version(ssl_); + if (ssl_mode_ == SSL_MODE_DTLS) { + if (ssl_version == DTLS1_VERSION) { + return SSL_PROTOCOL_DTLS_10; + } else if (ssl_version == DTLS1_2_VERSION) { + return SSL_PROTOCOL_DTLS_12; + } + } else { + if (ssl_version == TLS1_VERSION) { + return SSL_PROTOCOL_TLS_10; + } else if (ssl_version == TLS1_1_VERSION) { + return SSL_PROTOCOL_TLS_11; + } else if (ssl_version == TLS1_2_VERSION) { + return SSL_PROTOCOL_TLS_12; + } + } + + return SSL_PROTOCOL_NOT_GIVEN; +} + +bool OpenSSLStreamAdapter::GetSslVersionBytes(int* version) const { + if (state_ != SSL_CONNECTED) { + return false; + } + *version = SSL_version(ssl_); + return true; +} + +// Key Extractor interface +bool OpenSSLStreamAdapter::ExportKeyingMaterial(absl::string_view label, + const uint8_t* context, + size_t context_len, + bool use_context, + uint8_t* result, + size_t result_len) { + if (SSL_export_keying_material(ssl_, result, result_len, label.data(), + label.length(), context, context_len, + use_context) != 1) { + return false; + } + return true; +} + +uint16_t OpenSSLStreamAdapter::GetPeerSignatureAlgorithm() const { + if (state_ != SSL_CONNECTED) { + return 0; + } +#ifdef OPENSSL_IS_BORINGSSL + return SSL_get_peer_signature_algorithm(ssl_); +#else + return kSslSignatureAlgorithmUnknown; +#endif +} + +bool OpenSSLStreamAdapter::SetDtlsSrtpCryptoSuites( + const std::vector<int>& ciphers) { + if (state_ != SSL_NONE) { + return false; + } + + std::string internal_ciphers; + for (const int cipher : ciphers) { + bool found = false; + for (const auto& entry : kSrtpCipherMap) { + if (cipher == entry.id) { + found = true; + if (!internal_ciphers.empty()) { + internal_ciphers += ":"; + } + internal_ciphers += entry.internal_name; + break; + } + } + + if (!found) { + RTC_LOG(LS_ERROR) << "Could not find cipher: " << cipher; + return false; + } + } + + if (internal_ciphers.empty()) { + return false; + } + + srtp_ciphers_ = internal_ciphers; + return true; +} + +bool OpenSSLStreamAdapter::GetDtlsSrtpCryptoSuite(int* crypto_suite) { + RTC_DCHECK(state_ == SSL_CONNECTED); + if (state_ != SSL_CONNECTED) { + return false; + } + + const SRTP_PROTECTION_PROFILE* srtp_profile = + SSL_get_selected_srtp_profile(ssl_); + + if (!srtp_profile) { + return false; + } + + *crypto_suite = srtp_profile->id; + RTC_DCHECK(!SrtpCryptoSuiteToName(*crypto_suite).empty()); + return true; +} + +bool OpenSSLStreamAdapter::IsTlsConnected() { + return state_ == SSL_CONNECTED; +} + +int OpenSSLStreamAdapter::StartSSL() { + // Don't allow StartSSL to be called twice. + if (state_ != SSL_NONE) { + return -1; + } + + if (stream_->GetState() != SS_OPEN) { + state_ = SSL_WAIT; + return 0; + } + + state_ = SSL_CONNECTING; + if (int err = BeginSSL()) { + Error("BeginSSL", err, 0, false); + return err; + } + + return 0; +} + +void OpenSSLStreamAdapter::SetMode(SSLMode mode) { + RTC_DCHECK(state_ == SSL_NONE); + ssl_mode_ = mode; +} + +void OpenSSLStreamAdapter::SetMaxProtocolVersion(SSLProtocolVersion version) { + RTC_DCHECK(ssl_ctx_ == nullptr); + ssl_max_version_ = version; +} + +void OpenSSLStreamAdapter::SetInitialRetransmissionTimeout(int timeout_ms) { + RTC_DCHECK(ssl_ctx_ == nullptr); + dtls_handshake_timeout_ms_ = timeout_ms; +} + +// +// StreamInterface Implementation +// +StreamResult OpenSSLStreamAdapter::Write(rtc::ArrayView<const uint8_t> data, + size_t& written, + int& error) { + RTC_DLOG(LS_VERBOSE) << "OpenSSLStreamAdapter::Write(" << data.size() << ")"; + + switch (state_) { + case SSL_NONE: + // pass-through in clear text + return stream_->Write(data, written, error); + + case SSL_WAIT: + case SSL_CONNECTING: + return SR_BLOCK; + + case SSL_CONNECTED: + if (WaitingToVerifyPeerCertificate()) { + return SR_BLOCK; + } + break; + + case SSL_ERROR: + case SSL_CLOSED: + default: + error = ssl_error_code_; + return SR_ERROR; + } + + // OpenSSL will return an error if we try to write zero bytes + if (data.size() == 0) { + written = 0; + return SR_SUCCESS; + } + + ssl_write_needs_read_ = false; + + int code = SSL_write(ssl_, data.data(), checked_cast<int>(data.size())); + int ssl_error = SSL_get_error(ssl_, code); + switch (ssl_error) { + case SSL_ERROR_NONE: + RTC_DLOG(LS_VERBOSE) << " -- success"; + RTC_DCHECK_GT(code, 0); + RTC_DCHECK_LE(code, data.size()); + written = code; + return SR_SUCCESS; + case SSL_ERROR_WANT_READ: + RTC_DLOG(LS_VERBOSE) << " -- error want read"; + ssl_write_needs_read_ = true; + return SR_BLOCK; + case SSL_ERROR_WANT_WRITE: + RTC_DLOG(LS_VERBOSE) << " -- error want write"; + return SR_BLOCK; + + case SSL_ERROR_ZERO_RETURN: + default: + Error("SSL_write", (ssl_error ? ssl_error : -1), 0, false); + error = ssl_error_code_; + return SR_ERROR; + } + // not reached +} + +StreamResult OpenSSLStreamAdapter::Read(rtc::ArrayView<uint8_t> data, + size_t& read, + int& error) { + RTC_DLOG(LS_VERBOSE) << "OpenSSLStreamAdapter::Read(" << data.size() << ")"; + switch (state_) { + case SSL_NONE: + // pass-through in clear text + return stream_->Read(data, read, error); + case SSL_WAIT: + case SSL_CONNECTING: + return SR_BLOCK; + case SSL_CONNECTED: + if (WaitingToVerifyPeerCertificate()) { + return SR_BLOCK; + } + break; + case SSL_CLOSED: + return SR_EOS; + case SSL_ERROR: + default: + error = ssl_error_code_; + return SR_ERROR; + } + + // Don't trust OpenSSL with zero byte reads + if (data.size() == 0) { + read = 0; + return SR_SUCCESS; + } + + ssl_read_needs_write_ = false; + + const int code = SSL_read(ssl_, data.data(), checked_cast<int>(data.size())); + const int ssl_error = SSL_get_error(ssl_, code); + + switch (ssl_error) { + case SSL_ERROR_NONE: + RTC_DLOG(LS_VERBOSE) << " -- success"; + RTC_DCHECK_GT(code, 0); + RTC_DCHECK_LE(code, data.size()); + read = code; + + if (ssl_mode_ == SSL_MODE_DTLS) { + // Enforce atomic reads -- this is a short read + unsigned int pending = SSL_pending(ssl_); + + if (pending) { + RTC_DLOG(LS_INFO) << " -- short DTLS read. flushing"; + FlushInput(pending); + error = SSE_MSG_TRUNC; + return SR_ERROR; + } + } + return SR_SUCCESS; + case SSL_ERROR_WANT_READ: + RTC_DLOG(LS_VERBOSE) << " -- error want read"; + return SR_BLOCK; + case SSL_ERROR_WANT_WRITE: + RTC_DLOG(LS_VERBOSE) << " -- error want write"; + ssl_read_needs_write_ = true; + return SR_BLOCK; + case SSL_ERROR_ZERO_RETURN: + RTC_DLOG(LS_VERBOSE) << " -- remote side closed"; + Close(); + return SR_EOS; + default: + Error("SSL_read", (ssl_error ? ssl_error : -1), 0, false); + error = ssl_error_code_; + return SR_ERROR; + } + // not reached +} + +void OpenSSLStreamAdapter::FlushInput(unsigned int left) { + unsigned char buf[2048]; + + while (left) { + // This should always succeed + const int toread = (sizeof(buf) < left) ? sizeof(buf) : left; + const int code = SSL_read(ssl_, buf, toread); + + const int ssl_error = SSL_get_error(ssl_, code); + RTC_DCHECK(ssl_error == SSL_ERROR_NONE); + + if (ssl_error != SSL_ERROR_NONE) { + RTC_DLOG(LS_VERBOSE) << " -- error " << code; + Error("SSL_read", (ssl_error ? ssl_error : -1), 0, false); + return; + } + + RTC_DLOG(LS_VERBOSE) << " -- flushed " << code << " bytes"; + left -= code; + } +} + +void OpenSSLStreamAdapter::Close() { + Cleanup(0); + RTC_DCHECK(state_ == SSL_CLOSED || state_ == SSL_ERROR); + // When we're closed at SSL layer, also close the stream level which + // performs necessary clean up. Otherwise, a new incoming packet after + // this could overflow the stream buffer. + stream_->Close(); +} + +StreamState OpenSSLStreamAdapter::GetState() const { + switch (state_) { + case SSL_WAIT: + case SSL_CONNECTING: + return SS_OPENING; + case SSL_CONNECTED: + if (WaitingToVerifyPeerCertificate()) { + return SS_OPENING; + } + return SS_OPEN; + default: + return SS_CLOSED; + } + // not reached +} + +void OpenSSLStreamAdapter::OnEvent(StreamInterface* stream, + int events, + int err) { + int events_to_signal = 0; + int signal_error = 0; + RTC_DCHECK(stream == stream_.get()); + + if ((events & SE_OPEN)) { + RTC_DLOG(LS_VERBOSE) << "OpenSSLStreamAdapter::OnEvent SE_OPEN"; + if (state_ != SSL_WAIT) { + RTC_DCHECK(state_ == SSL_NONE); + events_to_signal |= SE_OPEN; + } else { + state_ = SSL_CONNECTING; + if (int err = BeginSSL()) { + Error("BeginSSL", err, 0, true); + return; + } + } + } + + if ((events & (SE_READ | SE_WRITE))) { + RTC_DLOG(LS_VERBOSE) << "OpenSSLStreamAdapter::OnEvent" + << ((events & SE_READ) ? " SE_READ" : "") + << ((events & SE_WRITE) ? " SE_WRITE" : ""); + if (state_ == SSL_NONE) { + events_to_signal |= events & (SE_READ | SE_WRITE); + } else if (state_ == SSL_CONNECTING) { + if (int err = ContinueSSL()) { + Error("ContinueSSL", err, 0, true); + return; + } + } else if (state_ == SSL_CONNECTED) { + if (((events & SE_READ) && ssl_write_needs_read_) || + (events & SE_WRITE)) { + RTC_DLOG(LS_VERBOSE) << " -- onStreamWriteable"; + events_to_signal |= SE_WRITE; + } + if (((events & SE_WRITE) && ssl_read_needs_write_) || + (events & SE_READ)) { + RTC_DLOG(LS_VERBOSE) << " -- onStreamReadable"; + events_to_signal |= SE_READ; + } + } + } + + if ((events & SE_CLOSE)) { + RTC_DLOG(LS_VERBOSE) << "OpenSSLStreamAdapter::OnEvent(SE_CLOSE, " << err + << ")"; + Cleanup(0); + events_to_signal |= SE_CLOSE; + // SE_CLOSE is the only event that uses the final parameter to OnEvent(). + RTC_DCHECK(signal_error == 0); + signal_error = err; + } + + if (events_to_signal) { + // Note that the adapter presents itself as the origin of the stream events, + // since users of the adapter may not recognize the adapted object. + SignalEvent(this, events_to_signal, signal_error); + } +} + +void OpenSSLStreamAdapter::PostEvent(int events, int err) { + owner_->PostTask(SafeTask(task_safety_.flag(), [this, events, err]() { + SignalEvent(this, events, err); + })); +} + +void OpenSSLStreamAdapter::SetTimeout(int delay_ms) { + // We need to accept 0 delay here as well as >0 delay, because + // DTLSv1_get_timeout seems to frequently return 0 ms. + RTC_DCHECK_GE(delay_ms, 0); + RTC_DCHECK(!timeout_task_.Running()); + + timeout_task_ = webrtc::RepeatingTaskHandle::DelayedStart( + owner_, webrtc::TimeDelta::Millis(delay_ms), + [flag = task_safety_.flag(), this]() { + if (flag->alive()) { + RTC_DLOG(LS_INFO) << "DTLS timeout expired"; + timeout_task_.Stop(); + int res = DTLSv1_handle_timeout(ssl_); + if (res > 0) { + RTC_LOG(LS_INFO) << "DTLS retransmission"; + } else if (res < 0) { + RTC_LOG(LS_INFO) << "DTLSv1_handle_timeout() return -1"; + Error("DTLSv1_handle_timeout", res, -1, true); + return webrtc::TimeDelta::PlusInfinity(); + } + ContinueSSL(); + } else { + RTC_DCHECK_NOTREACHED(); + } + // This callback will never run again (stopped above). + return webrtc::TimeDelta::PlusInfinity(); + }); +} + +int OpenSSLStreamAdapter::BeginSSL() { + RTC_DCHECK(state_ == SSL_CONNECTING); + // The underlying stream has opened. + RTC_DLOG(LS_INFO) << "BeginSSL with peer."; + + BIO* bio = nullptr; + + // First set up the context. + RTC_DCHECK(ssl_ctx_ == nullptr); + ssl_ctx_ = SetupSSLContext(); + if (!ssl_ctx_) { + return -1; + } + + bio = BIO_new_stream(stream_.get()); + if (!bio) { + return -1; + } + + ssl_ = SSL_new(ssl_ctx_); + if (!ssl_) { + BIO_free(bio); + return -1; + } + + SSL_set_app_data(ssl_, this); + + SSL_set_bio(ssl_, bio, bio); // the SSL object owns the bio now. + if (ssl_mode_ == SSL_MODE_DTLS) { +#ifdef OPENSSL_IS_BORINGSSL + DTLSv1_set_initial_timeout_duration(ssl_, dtls_handshake_timeout_ms_); +#else + // Enable read-ahead for DTLS so whole packets are read from internal BIO + // before parsing. This is done internally by BoringSSL for DTLS. + SSL_set_read_ahead(ssl_, 1); +#endif + } + + SSL_set_mode(ssl_, SSL_MODE_ENABLE_PARTIAL_WRITE | + SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER); + + // Do the connect + return ContinueSSL(); +} + +int OpenSSLStreamAdapter::ContinueSSL() { + RTC_DLOG(LS_VERBOSE) << "ContinueSSL"; + RTC_DCHECK(state_ == SSL_CONNECTING); + + // Clear the DTLS timer + timeout_task_.Stop(); + + const int code = (role_ == SSL_CLIENT) ? SSL_connect(ssl_) : SSL_accept(ssl_); + const int ssl_error = SSL_get_error(ssl_, code); + + switch (ssl_error) { + case SSL_ERROR_NONE: + RTC_DLOG(LS_VERBOSE) << " -- success"; + // By this point, OpenSSL should have given us a certificate, or errored + // out if one was missing. + RTC_DCHECK(peer_cert_chain_ || !GetClientAuthEnabled()); + + state_ = SSL_CONNECTED; + if (!WaitingToVerifyPeerCertificate()) { + // We have everything we need to start the connection, so signal + // SE_OPEN. If we need a client certificate fingerprint and don't have + // it yet, we'll instead signal SE_OPEN in SetPeerCertificateDigest. + // + // TODO(deadbeef): Post this event asynchronously to unwind the stack. + // The caller of ContinueSSL may be the same object listening for these + // events and may not be prepared for reentrancy. + // PostEvent(SE_OPEN | SE_READ | SE_WRITE, 0); + SignalEvent(this, SE_OPEN | SE_READ | SE_WRITE, 0); + } + break; + + case SSL_ERROR_WANT_READ: { + RTC_DLOG(LS_VERBOSE) << " -- error want read"; + struct timeval timeout; + if (DTLSv1_get_timeout(ssl_, &timeout)) { + int delay = timeout.tv_sec * 1000 + timeout.tv_usec / 1000; + SetTimeout(delay); + } + } break; + + case SSL_ERROR_WANT_WRITE: + RTC_DLOG(LS_VERBOSE) << " -- error want write"; + break; + + case SSL_ERROR_ZERO_RETURN: + default: + SSLHandshakeError ssl_handshake_err = SSLHandshakeError::UNKNOWN; + int err_code = ERR_peek_last_error(); + if (err_code != 0 && ERR_GET_REASON(err_code) == SSL_R_NO_SHARED_CIPHER) { + ssl_handshake_err = SSLHandshakeError::INCOMPATIBLE_CIPHERSUITE; + } + RTC_DLOG(LS_VERBOSE) << " -- error " << code << ", " << err_code << ", " + << ERR_GET_REASON(err_code); + if (handshake_error_) { + handshake_error_(ssl_handshake_err); + } + return (ssl_error != 0) ? ssl_error : -1; + } + + return 0; +} + +void OpenSSLStreamAdapter::Error(absl::string_view context, + int err, + uint8_t alert, + bool signal) { + RTC_LOG(LS_WARNING) << "OpenSSLStreamAdapter::Error(" << context << ", " + << err << ", " << static_cast<int>(alert) << ")"; + state_ = SSL_ERROR; + ssl_error_code_ = err; + Cleanup(alert); + if (signal) { + SignalEvent(this, SE_CLOSE, err); + } +} + +void OpenSSLStreamAdapter::Cleanup(uint8_t alert) { + RTC_DLOG(LS_INFO) << "Cleanup"; + + if (state_ != SSL_ERROR) { + state_ = SSL_CLOSED; + ssl_error_code_ = 0; + } + + if (ssl_) { + int ret; +// SSL_send_fatal_alert is only available in BoringSSL. +#ifdef OPENSSL_IS_BORINGSSL + if (alert) { + ret = SSL_send_fatal_alert(ssl_, alert); + if (ret < 0) { + RTC_LOG(LS_WARNING) << "SSL_send_fatal_alert failed, error = " + << SSL_get_error(ssl_, ret); + } + } else { +#endif + ret = SSL_shutdown(ssl_); + if (ret < 0) { + RTC_LOG(LS_WARNING) + << "SSL_shutdown failed, error = " << SSL_get_error(ssl_, ret); + } +#ifdef OPENSSL_IS_BORINGSSL + } +#endif + SSL_free(ssl_); + ssl_ = nullptr; + } + if (ssl_ctx_) { + SSL_CTX_free(ssl_ctx_); + ssl_ctx_ = nullptr; + } + identity_.reset(); + peer_cert_chain_.reset(); + + // Clear the DTLS timer + timeout_task_.Stop(); +} + +SSL_CTX* OpenSSLStreamAdapter::SetupSSLContext() { +#ifdef OPENSSL_IS_BORINGSSL + // If X509 objects aren't used, we can use these methods to avoid + // linking the sizable crypto/x509 code, using CRYPTO_BUFFER instead. + SSL_CTX* ctx = + SSL_CTX_new(ssl_mode_ == SSL_MODE_DTLS ? DTLS_with_buffers_method() + : TLS_with_buffers_method()); +#else + SSL_CTX* ctx = + SSL_CTX_new(ssl_mode_ == SSL_MODE_DTLS ? DTLS_method() : TLS_method()); +#endif + if (ctx == nullptr) { + return nullptr; + } + + if (support_legacy_tls_protocols_flag_) { + // TODO(https://bugs.webrtc.org/10261): Completely remove this branch in + // M84. + SSL_CTX_set_min_proto_version( + ctx, ssl_mode_ == SSL_MODE_DTLS ? DTLS1_VERSION : TLS1_VERSION); + switch (ssl_max_version_) { + case SSL_PROTOCOL_TLS_10: + SSL_CTX_set_max_proto_version( + ctx, ssl_mode_ == SSL_MODE_DTLS ? DTLS1_VERSION : TLS1_VERSION); + break; + case SSL_PROTOCOL_TLS_11: + SSL_CTX_set_max_proto_version( + ctx, ssl_mode_ == SSL_MODE_DTLS ? DTLS1_VERSION : TLS1_1_VERSION); + break; + case SSL_PROTOCOL_TLS_12: + default: + SSL_CTX_set_max_proto_version( + ctx, ssl_mode_ == SSL_MODE_DTLS ? DTLS1_2_VERSION : TLS1_2_VERSION); + break; + } + } else { + // TODO(https://bugs.webrtc.org/10261): Make this the default in M84. + SSL_CTX_set_min_proto_version( + ctx, ssl_mode_ == SSL_MODE_DTLS ? DTLS1_2_VERSION : TLS1_2_VERSION); + SSL_CTX_set_max_proto_version( + ctx, ssl_mode_ == SSL_MODE_DTLS ? DTLS1_2_VERSION : TLS1_2_VERSION); + } + +#ifdef OPENSSL_IS_BORINGSSL + // SSL_CTX_set_current_time_cb is only supported in BoringSSL. + if (g_use_time_callback_for_testing) { + SSL_CTX_set_current_time_cb(ctx, &TimeCallbackForTesting); + } + SSL_CTX_set0_buffer_pool(ctx, openssl::GetBufferPool()); +#endif + + if (identity_ && !identity_->ConfigureIdentity(ctx)) { + SSL_CTX_free(ctx); + return nullptr; + } + + SSL_CTX_set_info_callback(ctx, OpenSSLAdapter::SSLInfoCallback); + + int mode = SSL_VERIFY_PEER; + if (GetClientAuthEnabled()) { + // Require a certificate from the client. + // Note: Normally this is always true in production, but it may be disabled + // for testing purposes (e.g. SSLAdapter unit tests). + mode |= SSL_VERIFY_FAIL_IF_NO_PEER_CERT; + } + + // Configure a custom certificate verification callback to check the peer + // certificate digest. +#ifdef OPENSSL_IS_BORINGSSL + // Use CRYPTO_BUFFER version of the callback if building with BoringSSL. + SSL_CTX_set_custom_verify(ctx, mode, SSLVerifyCallback); +#else + // Note the second argument to SSL_CTX_set_verify is to override individual + // errors in the default verification logic, which is not what we want here. + SSL_CTX_set_verify(ctx, mode, nullptr); + SSL_CTX_set_cert_verify_callback(ctx, SSLVerifyCallback, nullptr); +#endif + + // Select list of available ciphers. Note that !SHA256 and !SHA384 only + // remove HMAC-SHA256 and HMAC-SHA384 cipher suites, not GCM cipher suites + // with SHA256 or SHA384 as the handshake hash. + // This matches the list of SSLClientSocketImpl in Chromium. + SSL_CTX_set_cipher_list( + ctx, + "DEFAULT:!NULL:!aNULL:!SHA256:!SHA384:!aECDH:!AESGCM+AES256:!aPSK:!3DES"); + + if (!srtp_ciphers_.empty()) { + if (SSL_CTX_set_tlsext_use_srtp(ctx, srtp_ciphers_.c_str())) { + SSL_CTX_free(ctx); + return nullptr; + } + } + +#ifdef OPENSSL_IS_BORINGSSL + SSL_CTX_set_permute_extensions( + ctx, webrtc::field_trial::IsEnabled("WebRTC-PermuteTlsClientHello")); +#endif + + return ctx; +} + +bool OpenSSLStreamAdapter::VerifyPeerCertificate() { + if (!HasPeerCertificateDigest() || !peer_cert_chain_ || + !peer_cert_chain_->GetSize()) { + RTC_LOG(LS_WARNING) << "Missing digest or peer certificate."; + return false; + } + + unsigned char digest[EVP_MAX_MD_SIZE]; + size_t digest_length; + if (!peer_cert_chain_->Get(0).ComputeDigest( + peer_certificate_digest_algorithm_, digest, sizeof(digest), + &digest_length)) { + RTC_LOG(LS_WARNING) << "Failed to compute peer cert digest."; + return false; + } + + Buffer computed_digest(digest, digest_length); + if (computed_digest != peer_certificate_digest_value_) { + RTC_LOG(LS_WARNING) + << "Rejected peer certificate due to mismatched digest using " + << peer_certificate_digest_algorithm_ << ". Expected " + << rtc::hex_encode_with_delimiter(peer_certificate_digest_value_, ':') + << " got " << rtc::hex_encode_with_delimiter(computed_digest, ':'); + return false; + } + // Ignore any verification error if the digest matches, since there is no + // value in checking the validity of a self-signed cert issued by untrusted + // sources. + RTC_DLOG(LS_INFO) << "Accepted peer certificate."; + peer_certificate_verified_ = true; + return true; +} + +std::unique_ptr<SSLCertChain> OpenSSLStreamAdapter::GetPeerSSLCertChain() + const { + return peer_cert_chain_ ? peer_cert_chain_->Clone() : nullptr; +} + +#ifdef OPENSSL_IS_BORINGSSL +enum ssl_verify_result_t OpenSSLStreamAdapter::SSLVerifyCallback( + SSL* ssl, + uint8_t* out_alert) { + // Get our OpenSSLStreamAdapter from the context. + OpenSSLStreamAdapter* stream = + reinterpret_cast<OpenSSLStreamAdapter*>(SSL_get_app_data(ssl)); + const STACK_OF(CRYPTO_BUFFER)* chain = SSL_get0_peer_certificates(ssl); + // Creates certificate chain. + std::vector<std::unique_ptr<SSLCertificate>> cert_chain; + for (CRYPTO_BUFFER* cert : chain) { + cert_chain.emplace_back(new BoringSSLCertificate(bssl::UpRef(cert))); + } + stream->peer_cert_chain_.reset(new SSLCertChain(std::move(cert_chain))); + + // If the peer certificate digest isn't known yet, we'll wait to verify + // until it's known, and for now just return a success status. + if (stream->peer_certificate_digest_algorithm_.empty()) { + RTC_LOG(LS_INFO) << "Waiting to verify certificate until digest is known."; + // TODO(deadbeef): Use ssl_verify_retry? + return ssl_verify_ok; + } + + if (!stream->VerifyPeerCertificate()) { + return ssl_verify_invalid; + } + + return ssl_verify_ok; +} +#else // OPENSSL_IS_BORINGSSL +int OpenSSLStreamAdapter::SSLVerifyCallback(X509_STORE_CTX* store, void* arg) { + // Get our SSL structure and OpenSSLStreamAdapter from the store. + SSL* ssl = reinterpret_cast<SSL*>( + X509_STORE_CTX_get_ex_data(store, SSL_get_ex_data_X509_STORE_CTX_idx())); + OpenSSLStreamAdapter* stream = + reinterpret_cast<OpenSSLStreamAdapter*>(SSL_get_app_data(ssl)); + + // Record the peer's certificate. + X509* cert = X509_STORE_CTX_get0_cert(store); + stream->peer_cert_chain_.reset( + new SSLCertChain(std::make_unique<OpenSSLCertificate>(cert))); + + // If the peer certificate digest isn't known yet, we'll wait to verify + // until it's known, and for now just return a success status. + if (stream->peer_certificate_digest_algorithm_.empty()) { + RTC_DLOG(LS_INFO) << "Waiting to verify certificate until digest is known."; + return 1; + } + + if (!stream->VerifyPeerCertificate()) { + X509_STORE_CTX_set_error(store, X509_V_ERR_CERT_REJECTED); + return 0; + } + + return 1; +} +#endif // !OPENSSL_IS_BORINGSSL + +bool OpenSSLStreamAdapter::IsBoringSsl() { +#ifdef OPENSSL_IS_BORINGSSL + return true; +#else + return false; +#endif +} + +#define CDEF(X) \ + { static_cast<uint16_t>(TLS1_CK_##X & 0xffff), "TLS_" #X } + +struct cipher_list { + uint16_t cipher; + const char* cipher_str; +}; + +// TODO(torbjorng): Perhaps add more cipher suites to these lists. +static const cipher_list OK_RSA_ciphers[] = { + CDEF(ECDHE_RSA_WITH_AES_128_CBC_SHA), + CDEF(ECDHE_RSA_WITH_AES_256_CBC_SHA), + CDEF(ECDHE_RSA_WITH_AES_128_GCM_SHA256), +#ifdef TLS1_CK_ECDHE_RSA_WITH_AES_256_GCM_SHA256 + CDEF(ECDHE_RSA_WITH_AES_256_GCM_SHA256), +#endif +#ifdef TLS1_CK_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256 + CDEF(ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256), +#endif +}; + +static const cipher_list OK_ECDSA_ciphers[] = { + CDEF(ECDHE_ECDSA_WITH_AES_128_CBC_SHA), + CDEF(ECDHE_ECDSA_WITH_AES_256_CBC_SHA), + CDEF(ECDHE_ECDSA_WITH_AES_128_GCM_SHA256), +#ifdef TLS1_CK_ECDHE_ECDSA_WITH_AES_256_GCM_SHA256 + CDEF(ECDHE_ECDSA_WITH_AES_256_GCM_SHA256), +#endif +#ifdef TLS1_CK_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256 + CDEF(ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256), +#endif +}; +#undef CDEF + +bool OpenSSLStreamAdapter::IsAcceptableCipher(int cipher, KeyType key_type) { + if (key_type == KT_RSA) { + for (const cipher_list& c : OK_RSA_ciphers) { + if (cipher == c.cipher) { + return true; + } + } + } + + if (key_type == KT_ECDSA) { + for (const cipher_list& c : OK_ECDSA_ciphers) { + if (cipher == c.cipher) { + return true; + } + } + } + + return false; +} + +bool OpenSSLStreamAdapter::IsAcceptableCipher(absl::string_view cipher, + KeyType key_type) { + if (key_type == KT_RSA) { + for (const cipher_list& c : OK_RSA_ciphers) { + if (cipher == c.cipher_str) { + return true; + } + } + } + + if (key_type == KT_ECDSA) { + for (const cipher_list& c : OK_ECDSA_ciphers) { + if (cipher == c.cipher_str) { + return true; + } + } + } + + return false; +} + +void OpenSSLStreamAdapter::EnableTimeCallbackForTesting() { +#ifdef OPENSSL_IS_BORINGSSL + g_use_time_callback_for_testing = true; +#endif +} + +} // namespace rtc |