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/*
* 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/ssl_stream_adapter.h"
#include "absl/memory/memory.h"
#include "absl/strings/string_view.h"
#include "rtc_base/openssl_stream_adapter.h"
///////////////////////////////////////////////////////////////////////////////
namespace rtc {
// TODO(guoweis): Move this to SDP layer and use int form internally.
// webrtc:5043.
const char kCsAesCm128HmacSha1_80[] = "AES_CM_128_HMAC_SHA1_80";
const char kCsAesCm128HmacSha1_32[] = "AES_CM_128_HMAC_SHA1_32";
const char kCsAeadAes128Gcm[] = "AEAD_AES_128_GCM";
const char kCsAeadAes256Gcm[] = "AEAD_AES_256_GCM";
std::string SrtpCryptoSuiteToName(int crypto_suite) {
switch (crypto_suite) {
case kSrtpAes128CmSha1_32:
return kCsAesCm128HmacSha1_32;
case kSrtpAes128CmSha1_80:
return kCsAesCm128HmacSha1_80;
case kSrtpAeadAes128Gcm:
return kCsAeadAes128Gcm;
case kSrtpAeadAes256Gcm:
return kCsAeadAes256Gcm;
default:
return std::string();
}
}
int SrtpCryptoSuiteFromName(absl::string_view crypto_suite) {
if (crypto_suite == kCsAesCm128HmacSha1_32)
return kSrtpAes128CmSha1_32;
if (crypto_suite == kCsAesCm128HmacSha1_80)
return kSrtpAes128CmSha1_80;
if (crypto_suite == kCsAeadAes128Gcm)
return kSrtpAeadAes128Gcm;
if (crypto_suite == kCsAeadAes256Gcm)
return kSrtpAeadAes256Gcm;
return kSrtpInvalidCryptoSuite;
}
bool GetSrtpKeyAndSaltLengths(int crypto_suite,
int* key_length,
int* salt_length) {
switch (crypto_suite) {
case kSrtpAes128CmSha1_32:
case kSrtpAes128CmSha1_80:
// SRTP_AES128_CM_HMAC_SHA1_32 and SRTP_AES128_CM_HMAC_SHA1_80 are defined
// in RFC 5764 to use a 128 bits key and 112 bits salt for the cipher.
*key_length = 16;
*salt_length = 14;
break;
case kSrtpAeadAes128Gcm:
// kSrtpAeadAes128Gcm is defined in RFC 7714 to use a 128 bits key and
// a 96 bits salt for the cipher.
*key_length = 16;
*salt_length = 12;
break;
case kSrtpAeadAes256Gcm:
// kSrtpAeadAes256Gcm is defined in RFC 7714 to use a 256 bits key and
// a 96 bits salt for the cipher.
*key_length = 32;
*salt_length = 12;
break;
default:
return false;
}
return true;
}
bool IsGcmCryptoSuite(int crypto_suite) {
return (crypto_suite == kSrtpAeadAes256Gcm ||
crypto_suite == kSrtpAeadAes128Gcm);
}
bool IsGcmCryptoSuiteName(absl::string_view crypto_suite) {
return (crypto_suite == kCsAeadAes256Gcm || crypto_suite == kCsAeadAes128Gcm);
}
std::unique_ptr<SSLStreamAdapter> SSLStreamAdapter::Create(
std::unique_ptr<StreamInterface> stream) {
return std::make_unique<OpenSSLStreamAdapter>(std::move(stream));
}
bool SSLStreamAdapter::GetSslCipherSuite(int* cipher_suite) {
return false;
}
bool SSLStreamAdapter::ExportKeyingMaterial(absl::string_view label,
const uint8_t* context,
size_t context_len,
bool use_context,
uint8_t* result,
size_t result_len) {
return false; // Default is unsupported
}
bool SSLStreamAdapter::SetDtlsSrtpCryptoSuites(
const std::vector<int>& crypto_suites) {
return false;
}
bool SSLStreamAdapter::GetDtlsSrtpCryptoSuite(int* crypto_suite) {
return false;
}
bool SSLStreamAdapter::IsBoringSsl() {
return OpenSSLStreamAdapter::IsBoringSsl();
}
bool SSLStreamAdapter::IsAcceptableCipher(int cipher, KeyType key_type) {
return OpenSSLStreamAdapter::IsAcceptableCipher(cipher, key_type);
}
bool SSLStreamAdapter::IsAcceptableCipher(absl::string_view cipher,
KeyType key_type) {
return OpenSSLStreamAdapter::IsAcceptableCipher(cipher, key_type);
}
std::string SSLStreamAdapter::SslCipherSuiteToName(int cipher_suite) {
return OpenSSLStreamAdapter::SslCipherSuiteToName(cipher_suite);
}
///////////////////////////////////////////////////////////////////////////////
// Test only settings
///////////////////////////////////////////////////////////////////////////////
void SSLStreamAdapter::EnableTimeCallbackForTesting() {
OpenSSLStreamAdapter::EnableTimeCallbackForTesting();
}
///////////////////////////////////////////////////////////////////////////////
} // namespace rtc
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