6caca655d8
This is a reland of commit 65ae3245f9380e46b1d755f3f452ba63ab6cdf8d with more backward compat which also fixes the off-by-one issue which caused wrong SRTP keys to be extracted. Original change's description: > Spanify SRTP key export > > and simplify the interface used as this is only used for exporting > SRTP keys and passing arcane OpenSSL arguments around does not make > much sense. > > BUG=webrtc:357776213 > > Change-Id: I9e5a94fe368b77975e48b6dd5ab6a2d2575d6382 > Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/364521 > Commit-Queue: Philipp Hancke <phancke@meta.com> > Reviewed-by: Harald Alvestrand <hta@webrtc.org> > Reviewed-by: Florent Castelli <orphis@webrtc.org> > Cr-Commit-Position: refs/heads/main@{#43198} Bug: webrtc:357776213 Change-Id: I5d43dc23f90ef630834fb400751979fcc5e18203 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/365180 Reviewed-by: Harald Alvestrand <hta@webrtc.org> Reviewed-by: Jeremy Leconte <jleconte@webrtc.org> Commit-Queue: Philipp Hancke <phancke@meta.com> Cr-Commit-Position: refs/heads/main@{#43225}
112 lines
3.6 KiB
C++
112 lines
3.6 KiB
C++
/*
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* Copyright 2004 The WebRTC Project Authors. All rights reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "rtc_base/ssl_stream_adapter.h"
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#include <cstddef>
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#include <cstdint>
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#include <memory>
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#include <string>
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#include <utility>
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#include <vector>
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#include "absl/functional/any_invocable.h"
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#include "absl/strings/string_view.h"
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#include "rtc_base/openssl_stream_adapter.h"
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#include "rtc_base/ssl_identity.h"
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#include "rtc_base/stream.h"
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namespace rtc {
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// Deprecated, prefer SrtpCryptoSuiteToName.
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const char kCsAesCm128HmacSha1_80[] = "AES_CM_128_HMAC_SHA1_80";
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const char kCsAesCm128HmacSha1_32[] = "AES_CM_128_HMAC_SHA1_32";
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const char kCsAeadAes128Gcm[] = "AEAD_AES_128_GCM";
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const char kCsAeadAes256Gcm[] = "AEAD_AES_256_GCM";
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std::string SrtpCryptoSuiteToName(int crypto_suite) {
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switch (crypto_suite) {
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case kSrtpAes128CmSha1_80:
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return "AES_CM_128_HMAC_SHA1_80";
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case kSrtpAes128CmSha1_32:
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return "AES_CM_128_HMAC_SHA1_32";
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case kSrtpAeadAes128Gcm:
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return "AEAD_AES_128_GCM";
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case kSrtpAeadAes256Gcm:
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return "AEAD_AES_256_GCM";
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default:
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return std::string();
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}
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}
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bool GetSrtpKeyAndSaltLengths(int crypto_suite,
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int* key_length,
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int* salt_length) {
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switch (crypto_suite) {
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case kSrtpAes128CmSha1_32:
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case kSrtpAes128CmSha1_80:
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// SRTP_AES128_CM_HMAC_SHA1_32 and SRTP_AES128_CM_HMAC_SHA1_80 are defined
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// in RFC 5764 to use a 128 bits key and 112 bits salt for the cipher.
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*key_length = 16;
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*salt_length = 14;
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break;
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case kSrtpAeadAes128Gcm:
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// kSrtpAeadAes128Gcm is defined in RFC 7714 to use a 128 bits key and
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// a 96 bits salt for the cipher.
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*key_length = 16;
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*salt_length = 12;
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break;
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case kSrtpAeadAes256Gcm:
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// kSrtpAeadAes256Gcm is defined in RFC 7714 to use a 256 bits key and
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// a 96 bits salt for the cipher.
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*key_length = 32;
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*salt_length = 12;
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break;
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default:
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return false;
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}
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return true;
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}
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bool IsGcmCryptoSuite(int crypto_suite) {
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return (crypto_suite == kSrtpAeadAes256Gcm ||
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crypto_suite == kSrtpAeadAes128Gcm);
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}
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std::unique_ptr<SSLStreamAdapter> SSLStreamAdapter::Create(
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std::unique_ptr<StreamInterface> stream,
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absl::AnyInvocable<void(SSLHandshakeError)> handshake_error) {
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return std::make_unique<OpenSSLStreamAdapter>(std::move(stream),
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std::move(handshake_error));
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}
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bool SSLStreamAdapter::IsBoringSsl() {
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return OpenSSLStreamAdapter::IsBoringSsl();
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}
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bool SSLStreamAdapter::IsAcceptableCipher(int cipher, KeyType key_type) {
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return OpenSSLStreamAdapter::IsAcceptableCipher(cipher, key_type);
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}
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bool SSLStreamAdapter::IsAcceptableCipher(absl::string_view cipher,
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KeyType key_type) {
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return OpenSSLStreamAdapter::IsAcceptableCipher(cipher, key_type);
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}
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///////////////////////////////////////////////////////////////////////////////
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// Test only settings
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///////////////////////////////////////////////////////////////////////////////
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void SSLStreamAdapter::EnableTimeCallbackForTesting() {
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OpenSSLStreamAdapter::EnableTimeCallbackForTesting();
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}
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///////////////////////////////////////////////////////////////////////////////
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} // namespace rtc
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