/* * 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 "pc/srtp_session.h" #include #include #include #include #include #include #include "api/field_trials.h" #include "api/rtp_header_extension_id.h" #include "media/base/fake_rtp.h" #include "pc/test/srtp_test_util.h" #include "rtc_base/buffer.h" #include "rtc_base/byte_order.h" #include "rtc_base/copy_on_write_buffer.h" #include "rtc_base/ssl_stream_adapter.h" // For webrtc::SRTP_* #include "system_wrappers/include/metrics.h" #include "test/create_test_field_trials.h" #include "test/gmock.h" #include "test/gtest.h" #include "third_party/libsrtp/include/srtp.h" using ::testing::ElementsAre; using ::testing::Pair; using ::testing::SizeIs; namespace webrtc { std::vector kEncryptedHeaderExtensionIds; class SrtpSessionTest : public ::testing::Test { public: SrtpSessionTest() : s1_(field_trials_), s2_(field_trials_) { metrics::Reset(); } protected: void SetUp() override { rtp_len_ = sizeof(kPcmuFrame); rtcp_len_ = sizeof(kFakeRtcpReport); rtp_packet_.EnsureCapacity(rtp_len_ + 10); rtp_packet_.SetData(kPcmuFrame, rtp_len_); rtcp_packet_.EnsureCapacity(rtcp_len_ + 4 + 10); rtcp_packet_.SetData(kFakeRtcpReport, rtcp_len_); } void TestProtectRtp(int crypto_suite) { EXPECT_TRUE(s1_.ProtectRtp(rtp_packet_)); EXPECT_EQ(rtp_packet_.size(), rtp_len_ + rtp_auth_tag_len(crypto_suite)); // Check that Protect changed the content (up to the original length). EXPECT_NE(0, std::memcmp(kPcmuFrame, rtp_packet_.data(), rtp_len_)); rtp_len_ = rtp_packet_.size(); } void TestProtectRtcp(int crypto_suite) { EXPECT_TRUE(s1_.ProtectRtcp(rtcp_packet_)); EXPECT_EQ(rtcp_packet_.size(), rtcp_len_ + 4 + rtcp_auth_tag_len(crypto_suite)); // Check that Protect changed the content (up to the original length). EXPECT_NE(0, std::memcmp(kFakeRtcpReport, rtcp_packet_.data(), rtcp_len_)); rtcp_len_ = rtcp_packet_.size(); } void TestUnprotectRtp(int crypto_suite) { EXPECT_TRUE(s2_.UnprotectRtp(rtp_packet_)); EXPECT_EQ(rtp_packet_.size(), sizeof(kPcmuFrame)); EXPECT_EQ(0, std::memcmp(kPcmuFrame, rtp_packet_.data(), rtp_packet_.size())); } void TestUnprotectRtcp(int crypto_suite) { EXPECT_TRUE(s2_.UnprotectRtcp(rtcp_packet_)); EXPECT_EQ(rtcp_packet_.size(), sizeof(kFakeRtcpReport)); EXPECT_EQ(0, std::memcmp(kFakeRtcpReport, rtcp_packet_.data(), rtcp_packet_.size())); } FieldTrials field_trials_ = CreateTestFieldTrials(); SrtpSession s1_; SrtpSession s2_; CopyOnWriteBuffer rtp_packet_; CopyOnWriteBuffer rtcp_packet_; size_t rtp_len_; size_t rtcp_len_; }; // Test that we can set up the session and keys properly. TEST_F(SrtpSessionTest, TestGoodSetup) { EXPECT_TRUE(s1_.SetSend(kSrtpAes128CmSha1_80, kTestKey1, kEncryptedHeaderExtensionIds)); EXPECT_TRUE(s2_.SetReceive(kSrtpAes128CmSha1_80, kTestKey1, kEncryptedHeaderExtensionIds)); } // Test that we can't change the keys once set. TEST_F(SrtpSessionTest, TestBadSetup) { EXPECT_TRUE(s1_.SetSend(kSrtpAes128CmSha1_80, kTestKey1, kEncryptedHeaderExtensionIds)); EXPECT_TRUE(s2_.SetReceive(kSrtpAes128CmSha1_80, kTestKey1, kEncryptedHeaderExtensionIds)); EXPECT_FALSE(s1_.SetSend(kSrtpAes128CmSha1_80, kTestKey2, kEncryptedHeaderExtensionIds)); EXPECT_FALSE(s2_.SetReceive(kSrtpAes128CmSha1_80, kTestKey2, kEncryptedHeaderExtensionIds)); } // Test that we fail keys of the wrong length. TEST_F(SrtpSessionTest, TestKeysTooShort) { EXPECT_FALSE(s1_.SetSend(kSrtpAes128CmSha1_80, ZeroOnFreeBuffer(kTestKey1.data(), 1), kEncryptedHeaderExtensionIds)); EXPECT_FALSE(s2_.SetReceive(kSrtpAes128CmSha1_80, ZeroOnFreeBuffer(kTestKey1.data(), 1), kEncryptedHeaderExtensionIds)); } // Test that we can encrypt and decrypt RTP/RTCP using AES_CM_128_HMAC_SHA1_80. TEST_F(SrtpSessionTest, TestProtect_AES_CM_128_HMAC_SHA1_80) { EXPECT_TRUE(s1_.SetSend(kSrtpAes128CmSha1_80, kTestKey1, kEncryptedHeaderExtensionIds)); EXPECT_TRUE(s2_.SetReceive(kSrtpAes128CmSha1_80, kTestKey1, kEncryptedHeaderExtensionIds)); TestProtectRtp(kSrtpAes128CmSha1_80); TestProtectRtcp(kSrtpAes128CmSha1_80); TestUnprotectRtp(kSrtpAes128CmSha1_80); TestUnprotectRtcp(kSrtpAes128CmSha1_80); } // Test that we can encrypt and decrypt RTP/RTCP using AES_CM_128_HMAC_SHA1_32. TEST_F(SrtpSessionTest, TestProtect_AES_CM_128_HMAC_SHA1_32) { EXPECT_TRUE(s1_.SetSend(kSrtpAes128CmSha1_32, kTestKey1, kEncryptedHeaderExtensionIds)); EXPECT_TRUE(s2_.SetReceive(kSrtpAes128CmSha1_32, kTestKey1, kEncryptedHeaderExtensionIds)); TestProtectRtp(kSrtpAes128CmSha1_32); TestProtectRtcp(kSrtpAes128CmSha1_32); TestUnprotectRtp(kSrtpAes128CmSha1_32); TestUnprotectRtcp(kSrtpAes128CmSha1_32); } TEST_F(SrtpSessionTest, TestGetSendStreamPacketIndex) { EXPECT_TRUE(s1_.SetSend(kSrtpAes128CmSha1_32, kTestKey1, kEncryptedHeaderExtensionIds)); int64_t index; EXPECT_TRUE(s1_.ProtectRtp(rtp_packet_, &index)); // `index` will be shifted by 16. int64_t be64_index = static_cast(NetworkToHost64(1 << 16)); EXPECT_EQ(be64_index, index); } // Test that we fail to unprotect if someone tampers with the RTP/RTCP paylaods. TEST_F(SrtpSessionTest, TestTamperReject) { EXPECT_TRUE(s1_.SetSend(kSrtpAes128CmSha1_80, kTestKey1, kEncryptedHeaderExtensionIds)); EXPECT_TRUE(s2_.SetReceive(kSrtpAes128CmSha1_80, kTestKey1, kEncryptedHeaderExtensionIds)); TestProtectRtp(kSrtpAes128CmSha1_80); rtp_packet_.MutableData()[0] = 0x12; EXPECT_FALSE(s2_.UnprotectRtp(rtp_packet_)); EXPECT_METRIC_THAT( metrics::Samples("WebRTC.PeerConnection.SrtpUnprotectError"), ElementsAre(Pair(srtp_err_status_bad_param, 1))); TestProtectRtcp(kSrtpAes128CmSha1_80); rtcp_packet_.MutableData()[1] = 0x34; EXPECT_FALSE(s2_.UnprotectRtcp(rtcp_packet_)); EXPECT_METRIC_THAT( metrics::Samples("WebRTC.PeerConnection.SrtcpUnprotectError"), ElementsAre(Pair(srtp_err_status_auth_fail, 1))); } // Test that we fail to unprotect if the payloads are not authenticated. TEST_F(SrtpSessionTest, TestUnencryptReject) { EXPECT_TRUE(s1_.SetSend(kSrtpAes128CmSha1_80, kTestKey1, kEncryptedHeaderExtensionIds)); EXPECT_TRUE(s2_.SetReceive(kSrtpAes128CmSha1_80, kTestKey1, kEncryptedHeaderExtensionIds)); EXPECT_FALSE(s2_.UnprotectRtp(rtp_packet_)); EXPECT_METRIC_THAT( metrics::Samples("WebRTC.PeerConnection.SrtpUnprotectError"), ElementsAre(Pair(srtp_err_status_auth_fail, 1))); EXPECT_FALSE(s2_.UnprotectRtcp(rtcp_packet_)); EXPECT_METRIC_THAT( metrics::Samples("WebRTC.PeerConnection.SrtcpUnprotectError"), ElementsAre(Pair(srtp_err_status_cant_check, 1))); } // Test that we fail when using buffers that are too small. TEST_F(SrtpSessionTest, TestBuffersTooSmall) { EXPECT_TRUE(s1_.SetSend(kSrtpAes128CmSha1_80, kTestKey1, kEncryptedHeaderExtensionIds)); // This buffer does not have extra capacity which we treat as an error. CopyOnWriteBuffer rtp_packet(rtp_packet_.data(), rtp_packet_.size(), rtp_packet_.size()); EXPECT_FALSE(s1_.ProtectRtp(rtp_packet)); // This buffer does not have extra capacity which we treat as an error. CopyOnWriteBuffer rtcp_packet(rtcp_packet_.data(), rtcp_packet_.size(), rtcp_packet_.size()); EXPECT_FALSE(s1_.ProtectRtcp(rtcp_packet)); } TEST_F(SrtpSessionTest, TestReplay) { static const uint16_t kMaxSeqnum = std::numeric_limits::max() - 1; static const uint16_t seqnum_big = 62275; static const uint16_t seqnum_small = 10; static const uint16_t replay_window = 1024; EXPECT_TRUE(s1_.SetSend(kSrtpAes128CmSha1_80, kTestKey1, kEncryptedHeaderExtensionIds)); EXPECT_TRUE(s2_.SetReceive(kSrtpAes128CmSha1_80, kTestKey1, kEncryptedHeaderExtensionIds)); // Initial sequence number. SetBE16( std::span(rtp_packet_.MutableData(), rtp_packet_.size()) .subspan(2, 2), seqnum_big); EXPECT_TRUE(s1_.ProtectRtp(rtp_packet_)); rtp_packet_.SetData(kPcmuFrame, sizeof(kPcmuFrame)); // Replay within the 1024 window should succeed. SetBE16( std::span(rtp_packet_.MutableData(), rtp_packet_.size()) .subspan(2, 2), seqnum_big - replay_window + 1); EXPECT_TRUE(s1_.ProtectRtp(rtp_packet_)); rtp_packet_.SetData(kPcmuFrame, sizeof(kPcmuFrame)); // Replay out side of the 1024 window should fail. SetBE16( std::span(rtp_packet_.MutableData(), rtp_packet_.size()) .subspan(2, 2), seqnum_big - replay_window - 1); EXPECT_FALSE(s1_.ProtectRtp(rtp_packet_)); rtp_packet_.SetData(kPcmuFrame, sizeof(kPcmuFrame)); // Increment sequence number to a small number. SetBE16( std::span(rtp_packet_.MutableData(), rtp_packet_.size()) .subspan(2, 2), seqnum_small); EXPECT_TRUE(s1_.ProtectRtp(rtp_packet_)); // Replay around 0 but out side of the 1024 window should fail. SetBE16( std::span(rtp_packet_.MutableData(), rtp_packet_.size()) .subspan(2, 2), kMaxSeqnum + seqnum_small - replay_window - 1); EXPECT_FALSE(s1_.ProtectRtp(rtp_packet_)); rtp_packet_.SetData(kPcmuFrame, sizeof(kPcmuFrame)); // Replay around 0 but within the 1024 window should succeed. for (uint16_t seqnum = 65000; seqnum < 65003; ++seqnum) { SetBE16(std::span(rtp_packet_.MutableData(), rtp_packet_.size()) .subspan(2, 2), seqnum); EXPECT_TRUE(s1_.ProtectRtp(rtp_packet_)); rtp_packet_.SetData(kPcmuFrame, sizeof(kPcmuFrame)); } // Go back to normal sequence nubmer. // NOTE: without the fix in libsrtp, this would fail. This is because // without the fix, the loop above would keep incrementing local sequence // number in libsrtp, eventually the new sequence number would go out side // of the window. SetBE16( std::span(rtp_packet_.MutableData(), rtp_packet_.size()) .subspan(2, 2), seqnum_small + 1); EXPECT_TRUE(s1_.ProtectRtp(rtp_packet_)); } TEST_F(SrtpSessionTest, RemoveSsrc) { EXPECT_TRUE(s1_.SetSend(kSrtpAes128CmSha1_80, kTestKey1, kEncryptedHeaderExtensionIds)); EXPECT_TRUE(s2_.SetReceive(kSrtpAes128CmSha1_80, kTestKey1, kEncryptedHeaderExtensionIds)); // Encrypt and decrypt the packet once. EXPECT_TRUE(s1_.ProtectRtp(rtp_packet_)); EXPECT_TRUE(s2_.UnprotectRtp(rtp_packet_)); EXPECT_EQ(sizeof(kPcmuFrame), rtp_packet_.size()); EXPECT_EQ(0, std::memcmp(kPcmuFrame, rtp_packet_.data(), rtp_packet_.size())); // Recreate the original packet and encrypt again. rtp_packet_.SetData(kPcmuFrame, sizeof(kPcmuFrame)); EXPECT_TRUE(s1_.ProtectRtp(rtp_packet_)); // Attempting to decrypt will fail as a replay attack. // (srtp_err_status_replay_fail) since the sequence number was already seen. EXPECT_FALSE(s2_.UnprotectRtp(rtp_packet_)); // Remove the fake packet SSRC 1 from the session. EXPECT_TRUE(s2_.RemoveSsrcFromSession(1)); EXPECT_FALSE(s2_.RemoveSsrcFromSession(1)); // Since the SRTP state was discarded, this is no longer a replay attack. EXPECT_TRUE(s2_.UnprotectRtp(rtp_packet_)); EXPECT_EQ(sizeof(kPcmuFrame), rtp_packet_.size()); EXPECT_EQ(0, std::memcmp(kPcmuFrame, rtp_packet_.data(), rtp_packet_.size())); EXPECT_TRUE(s2_.RemoveSsrcFromSession(1)); } TEST_F(SrtpSessionTest, ProtectUnprotectWrapAroundRocMismatch) { // This unit tests demonstrates why you should be careful when // choosing the initial RTP sequence number as there can be decryption // failures when it wraps around with packet loss. Pick your starting // sequence number in the lower half of the range for robustness reasons, // see packet_sequencer.cc for the code doing so. EXPECT_TRUE(s1_.SetSend(kSrtpAes128CmSha1_80, kTestKey1, kEncryptedHeaderExtensionIds)); EXPECT_TRUE(s2_.SetReceive(kSrtpAes128CmSha1_80, kTestKey1, kEncryptedHeaderExtensionIds)); // Buffers include enough room for the 10 byte SRTP auth tag so we can // encrypt in place. unsigned char kFrame1[] = { // clang-format off // PT=0, SN=65535, TS=0, SSRC=1 0x80, 0x00, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0xBE, 0xEF, // data bytes // Space for the SRTP auth tag 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, // clang-format on }; CopyOnWriteBuffer packet1(kFrame1, sizeof(kFrame1) - 10, sizeof(kFrame1)); unsigned char kFrame2[] = { // clang-format off // PT=0, SN=1, TS=0, SSRC=1 0x80, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0xBE, 0xEF, // data bytes // Space for the SRTP auth tag 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, // clang-format on }; CopyOnWriteBuffer packet2(kFrame2, sizeof(kFrame2) - 10, sizeof(kFrame1)); const unsigned char kPayload[] = {0xBE, 0xEF}; // Encrypt the frames in-order. There is a sequence number rollover from // 65535 to 1 (skipping 0) and the second packet gets encrypted with a // roll-over counter (ROC) of 1. See // https://datatracker.ietf.org/doc/html/rfc3711#section-3.3.1 EXPECT_TRUE(s1_.ProtectRtp(packet1)); EXPECT_EQ(packet1.size(), 24u); EXPECT_TRUE(s1_.ProtectRtp(packet2)); EXPECT_EQ(packet2.size(), 24u); // If we decrypt frame 2 first it will have a ROC of 1 but the receiver // does not know this is a rollover so will attempt with a ROC of 0. // Note: If libsrtp is modified to attempt to decrypt with ROC=1 for this // case, this test will fail and needs to be modified accordingly to unblock // the roll. See https://issues.webrtc.org/353565743 for details. EXPECT_FALSE(s2_.UnprotectRtp(packet2)); // Decrypt frame 1. EXPECT_TRUE(s2_.UnprotectRtp(packet1)); ASSERT_EQ(packet1.size(), 14u); EXPECT_EQ(0, std::memcmp(packet1.data() + 12, kPayload, sizeof(kPayload))); // Now decrypt frame 2 again. A rollover is detected which increases // the ROC to 1 so this succeeds. EXPECT_TRUE(s2_.UnprotectRtp(packet2)); ASSERT_EQ(packet2.size(), 14u); EXPECT_EQ(0, std::memcmp(packet2.data() + 12, kPayload, sizeof(kPayload))); } TEST_F(SrtpSessionTest, ProtectGetPacketIndex) { EXPECT_TRUE(s1_.SetSend(kSrtpAes128CmSha1_80, kTestKey1, kEncryptedHeaderExtensionIds)); EXPECT_TRUE(s2_.SetReceive(kSrtpAes128CmSha1_80, kTestKey1, kEncryptedHeaderExtensionIds)); // Buffers include enough room for the 10 byte SRTP auth tag so we can // encrypt in place. unsigned char kFrame1[] = { // clang-format off // PT=0, SN=65535, TS=0, SSRC=1 0x80, 0x00, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0xBE, 0xEF, // data bytes // Space for the SRTP auth tag 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, // clang-format on }; CopyOnWriteBuffer packet1(kFrame1, sizeof(kFrame1) - 10, sizeof(kFrame1)); unsigned char kFrame2[] = { // clang-format off // PT=0, SN=1, TS=0, SSRC=1 0x80, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0xBE, 0xEF, // data bytes // Space for the SRTP auth tag 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, // clang-format on }; CopyOnWriteBuffer packet2(kFrame2, sizeof(kFrame2) - 10, sizeof(kFrame1)); // Encrypt the frames in-order. There is a sequence number rollover from // 65535 to 1 (skipping 0) and the second packet gets encrypted with a // roll-over counter (ROC) of 1. See // https://datatracker.ietf.org/doc/html/rfc3711#section-3.3.1 int64_t index; EXPECT_TRUE(s1_.ProtectRtp(packet1, &index)); EXPECT_EQ(packet1.size(), 24u); EXPECT_EQ(index, 0xffff00000000); // ntohl(65535 << 16) EXPECT_TRUE(s1_.ProtectRtp(packet2, &index)); EXPECT_EQ(packet2.size(), 24u); EXPECT_EQ(index, 0x10001000000); // ntohl(65537 << 16) } static inline constexpr std::array kCryptexKeyRaw = { 0xe1, 0xf9, 0x7a, 0x0d, 0x3e, 0x01, 0x8b, 0xe0, 0xd6, 0x4f, 0xa3, 0x2c, 0x06, 0xde, 0x41, 0x39, 0x0e, 0xc6, 0x75, 0xad, 0x49, 0x8a, 0xfe, 0xeb, 0xb6, 0x96, 0x0b, 0x3a, 0xab, 0xe6}; static const ZeroOnFreeBuffer kCryptexKey{kCryptexKeyRaw.data(), kCryptexKeyRaw.size()}; class SrtpSessionTestCryptex : public SrtpSessionTest {}; TEST_F(SrtpSessionTestCryptex, TestCryptexRfc9335_A_1_1) { // Test vector from RFC 9335 Appendix A.1.1: // RTP Packet with One-Byte Header Extension const uint8_t kPacket[] = { 0x90, 0x0f, 0x12, 0x35, 0xde, 0xca, 0xfb, 0xad, 0xca, 0xfe, 0xba, 0xbe, 0xbe, 0xde, 0x00, 0x01, 0x51, 0x00, 0x02, 0x00, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab}; const uint8_t kEncrypted[] = { 0x90, 0x0f, 0x12, 0x35, 0xde, 0xca, 0xfb, 0xad, 0xca, 0xfe, 0xba, 0xbe, 0xc0, 0xde, 0x00, 0x01, 0xeb, 0x92, 0x36, 0x52, 0x51, 0xc3, 0xe0, 0x36, 0xf8, 0xde, 0x27, 0xe9, 0xc2, 0x7e, 0xe3, 0xe0, 0xb4, 0x65, 0x1d, 0x9f, 0xbc, 0x42, 0x18, 0xa7, 0x02, 0x44, 0x52, 0x2f, 0x34, 0xa5}; EXPECT_TRUE(s1_.UseCryptex(true, true, true)); EXPECT_TRUE(s1_.SetSend(kSrtpAes128CmSha1_80, kCryptexKey, {})); CopyOnWriteBuffer packet(kPacket, sizeof(kPacket), sizeof(kEncrypted)); EXPECT_TRUE(s1_.ProtectRtp(packet)); EXPECT_THAT(packet, SizeIs(sizeof(kEncrypted))); EXPECT_EQ(0, std::memcmp(packet.data(), kEncrypted, packet.size())); EXPECT_TRUE(s2_.UseCryptex(true, true, false)); EXPECT_TRUE(s2_.SetReceive(kSrtpAes128CmSha1_80, kCryptexKey, {})); EXPECT_TRUE(s2_.UnprotectRtp(packet)); EXPECT_THAT(packet, SizeIs(sizeof(kPacket))); EXPECT_EQ(0, std::memcmp(packet.data(), kPacket, packet.size())); } TEST_F(SrtpSessionTestCryptex, TestCryptexRfc9335_A_1_2) { // Test vector from RFC 9335 Appendix A.1.2: // RTP Packet with Two-Byte Header Extension const uint8_t kPacket[] = { 0x90, 0x0f, 0x12, 0x36, 0xde, 0xca, 0xfb, 0xad, 0xca, 0xfe, 0xba, 0xbe, 0x10, 0x00, 0x00, 0x01, 0x05, 0x02, 0x00, 0x02, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab}; const uint8_t kEncrypted[] = { 0x90, 0x0f, 0x12, 0x36, 0xde, 0xca, 0xfb, 0xad, 0xca, 0xfe, 0xba, 0xbe, 0xc2, 0xde, 0x00, 0x01, 0x4e, 0xd9, 0xcc, 0x4e, 0x6a, 0x71, 0x2b, 0x30, 0x96, 0xc5, 0xca, 0x77, 0x33, 0x9d, 0x42, 0x04, 0xce, 0x0d, 0x77, 0x39, 0x6c, 0xab, 0x69, 0x58, 0x5f, 0xbc, 0xe3, 0x81, 0x94, 0xa5}; EXPECT_TRUE(s1_.UseCryptex(true, true, true)); EXPECT_TRUE(s1_.SetSend(kSrtpAes128CmSha1_80, kCryptexKey, {})); CopyOnWriteBuffer packet(kPacket, sizeof(kPacket), sizeof(kEncrypted)); EXPECT_TRUE(s1_.ProtectRtp(packet)); EXPECT_THAT(packet, SizeIs(sizeof(kEncrypted))); EXPECT_EQ(0, std::memcmp(packet.data(), kEncrypted, packet.size())); EXPECT_TRUE(s2_.UseCryptex(true, true, false)); EXPECT_TRUE(s2_.SetReceive(kSrtpAes128CmSha1_80, kCryptexKey, {})); EXPECT_TRUE(s2_.UnprotectRtp(packet)); EXPECT_THAT(packet, SizeIs(sizeof(kPacket))); EXPECT_EQ(0, std::memcmp(packet.data(), kPacket, packet.size())); } TEST_F(SrtpSessionTestCryptex, TestCryptexRfc9335_A_1_3) { // Test vector from RFC 9335 Appendix A.1.3: // RTP Packet with One-Byte Header Extension and CSRC Fields const uint8_t kPacket[] = { 0x92, 0x0f, 0x12, 0x38, 0xde, 0xca, 0xfb, 0xad, 0xca, 0xfe, 0xba, 0xbe, 0x00, 0x01, 0xe2, 0x40, 0x00, 0x00, 0xb2, 0x6e, 0xbe, 0xde, 0x00, 0x01, 0x51, 0x00, 0x02, 0x00, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab}; const uint8_t kEncrypted[] = { 0x92, 0x0f, 0x12, 0x38, 0xde, 0xca, 0xfb, 0xad, 0xca, 0xfe, 0xba, 0xbe, 0x8b, 0xb6, 0xe1, 0x2b, 0x5c, 0xff, 0x16, 0xdd, 0xc0, 0xde, 0x00, 0x01, 0x92, 0x83, 0x8c, 0x8c, 0x09, 0xe5, 0x83, 0x93, 0xe1, 0xde, 0x3a, 0x9a, 0x74, 0x73, 0x4d, 0x67, 0x45, 0x67, 0x13, 0x38, 0xc3, 0xac, 0xf1, 0x1d, 0xa2, 0xdf, 0x84, 0x23, 0xbe, 0xe0}; EXPECT_TRUE(s1_.UseCryptex(true, true, true)); EXPECT_TRUE(s1_.SetSend(kSrtpAes128CmSha1_80, kCryptexKey, {})); CopyOnWriteBuffer packet(kPacket, sizeof(kPacket), sizeof(kEncrypted)); EXPECT_TRUE(s1_.ProtectRtp(packet)); EXPECT_THAT(packet, SizeIs(sizeof(kEncrypted))); EXPECT_EQ(0, std::memcmp(packet.data(), kEncrypted, packet.size())); EXPECT_TRUE(s2_.UseCryptex(true, true, false)); EXPECT_TRUE(s2_.SetReceive(kSrtpAes128CmSha1_80, kCryptexKey, {})); EXPECT_TRUE(s2_.UnprotectRtp(packet)); EXPECT_THAT(packet, SizeIs(sizeof(kPacket))); EXPECT_EQ(0, std::memcmp(packet.data(), kPacket, packet.size())); } TEST_F(SrtpSessionTestCryptex, TestCryptexRfc9335_A_1_4) { // Test vector from RFC 9335 Appendix A.1.4: // RTP Packet with Two-Byte Header Extension and CSRC Fields const uint8_t kPacket[] = { 0x92, 0x0f, 0x12, 0x39, 0xde, 0xca, 0xfb, 0xad, 0xca, 0xfe, 0xba, 0xbe, 0x00, 0x01, 0xe2, 0x40, 0x00, 0x00, 0xb2, 0x6e, 0x10, 0x00, 0x00, 0x01, 0x05, 0x02, 0x00, 0x02, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab}; const uint8_t kEncrypted[] = { 0x92, 0x0f, 0x12, 0x39, 0xde, 0xca, 0xfb, 0xad, 0xca, 0xfe, 0xba, 0xbe, 0xf7, 0x0e, 0x51, 0x3e, 0xb9, 0x0b, 0x9b, 0x25, 0xc2, 0xde, 0x00, 0x01, 0xbb, 0xed, 0x48, 0x48, 0xfa, 0xa6, 0x44, 0x66, 0x5f, 0x3d, 0x7f, 0x34, 0x12, 0x59, 0x14, 0xe9, 0xf4, 0xd0, 0xae, 0x92, 0x3c, 0x6f, 0x47, 0x9b, 0x95, 0xa0, 0xf7, 0xb5, 0x31, 0x33}; EXPECT_TRUE(s1_.UseCryptex(true, true, true)); EXPECT_TRUE(s1_.SetSend(kSrtpAes128CmSha1_80, kCryptexKey, {})); CopyOnWriteBuffer packet(kPacket, sizeof(kPacket), sizeof(kEncrypted)); EXPECT_TRUE(s1_.ProtectRtp(packet)); EXPECT_THAT(packet, SizeIs(sizeof(kEncrypted))); EXPECT_EQ(0, std::memcmp(packet.data(), kEncrypted, packet.size())); EXPECT_TRUE(s2_.UseCryptex(true, true, false)); EXPECT_TRUE(s2_.SetReceive(kSrtpAes128CmSha1_80, kCryptexKey, {})); EXPECT_TRUE(s2_.UnprotectRtp(packet)); EXPECT_THAT(packet, SizeIs(sizeof(kPacket))); EXPECT_EQ(0, std::memcmp(packet.data(), kPacket, packet.size())); } TEST_F(SrtpSessionTestCryptex, TestCryptexRfc9335_A_1_5) { // Test vector from RFC 9335 Appendix A.1.5: // RTP Packet with Empty One-Byte Header Extension and CSRC Fields const uint8_t kPacket[] = {0x92, 0x0f, 0x12, 0x3a, 0xde, 0xca, 0xfb, 0xad, 0xca, 0xfe, 0xba, 0xbe, 0x00, 0x01, 0xe2, 0x40, 0x00, 0x00, 0xb2, 0x6e, 0xbe, 0xde, 0x00, 0x00, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab}; const uint8_t kEncrypted[] = { 0x92, 0x0f, 0x12, 0x3a, 0xde, 0xca, 0xfb, 0xad, 0xca, 0xfe, 0xba, 0xbe, 0x71, 0x30, 0xb6, 0xab, 0xfe, 0x2a, 0xb0, 0xe3, 0xc0, 0xde, 0x00, 0x00, 0xe3, 0xd9, 0xf6, 0x4b, 0x25, 0xc9, 0xe7, 0x4c, 0xb4, 0xcf, 0x8e, 0x43, 0xfb, 0x92, 0xe3, 0x78, 0x1c, 0x2c, 0x0c, 0xea, 0xb6, 0xb3, 0xa4, 0x99, 0xa1, 0x4c}; EXPECT_TRUE(s1_.UseCryptex(true, true, true)); EXPECT_TRUE(s1_.SetSend(kSrtpAes128CmSha1_80, kCryptexKey, {})); CopyOnWriteBuffer packet(kPacket, sizeof(kPacket), sizeof(kEncrypted)); EXPECT_TRUE(s1_.ProtectRtp(packet)); EXPECT_THAT(packet, SizeIs(sizeof(kEncrypted))); EXPECT_EQ(0, std::memcmp(packet.data(), kEncrypted, packet.size())); EXPECT_TRUE(s2_.UseCryptex(true, true, false)); EXPECT_TRUE(s2_.SetReceive(kSrtpAes128CmSha1_80, kCryptexKey, {})); EXPECT_TRUE(s2_.UnprotectRtp(packet)); EXPECT_THAT(packet, SizeIs(sizeof(kPacket))); EXPECT_EQ(0, std::memcmp(packet.data(), kPacket, packet.size())); } TEST_F(SrtpSessionTestCryptex, TestCryptexRfc9335_A_1_6) { // Test vector from RFC 9335 Appendix A.1.6: // RTP Packet with Empty Two-Byte Header Extension and CSRC Fields const uint8_t kPacket[] = {0x92, 0x0f, 0x12, 0x3b, 0xde, 0xca, 0xfb, 0xad, 0xca, 0xfe, 0xba, 0xbe, 0x00, 0x01, 0xe2, 0x40, 0x00, 0x00, 0xb2, 0x6e, 0x10, 0x00, 0x00, 0x00, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab}; const uint8_t kEncrypted[] = { 0x92, 0x0f, 0x12, 0x3b, 0xde, 0xca, 0xfb, 0xad, 0xca, 0xfe, 0xba, 0xbe, 0xcb, 0xf2, 0x4c, 0x12, 0x43, 0x30, 0xe1, 0xc8, 0xc2, 0xde, 0x00, 0x00, 0x59, 0x9d, 0xd4, 0x5b, 0xc9, 0xd6, 0x87, 0xb6, 0x03, 0xe8, 0xb5, 0x9d, 0x77, 0x1f, 0xd3, 0x8e, 0x88, 0xb1, 0x70, 0xe0, 0xcd, 0x31, 0xe1, 0x25, 0xea, 0xbe}; EXPECT_TRUE(s1_.UseCryptex(true, true, true)); EXPECT_TRUE(s1_.SetSend(kSrtpAes128CmSha1_80, kCryptexKey, {})); CopyOnWriteBuffer packet(kPacket, sizeof(kPacket), sizeof(kEncrypted)); EXPECT_TRUE(s1_.ProtectRtp(packet)); EXPECT_THAT(packet, SizeIs(sizeof(kEncrypted))); EXPECT_EQ(0, std::memcmp(packet.data(), kEncrypted, packet.size())); EXPECT_TRUE(s2_.UseCryptex(true, true, false)); EXPECT_TRUE(s2_.SetReceive(kSrtpAes128CmSha1_80, kCryptexKey, {})); EXPECT_TRUE(s2_.UnprotectRtp(packet)); EXPECT_THAT(packet, SizeIs(sizeof(kPacket))); EXPECT_EQ(0, std::memcmp(packet.data(), kPacket, packet.size())); } TEST_F(SrtpSessionTestCryptex, TestCryptexRequire) { // Test vector from RFC 9335 Appendix A.1.1: // RTP Packet with One-Byte Header Extension const uint8_t kPacket[] = { 0x90, 0x0f, 0x12, 0x35, 0xde, 0xca, 0xfb, 0xad, 0xca, 0xfe, 0xba, 0xbe, 0xbe, 0xde, 0x00, 0x01, 0x51, 0x00, 0x02, 0x00, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab, 0xab}; // Sender is not enabling or requiring cryptex. EXPECT_TRUE(s1_.SetSend(kSrtpAes128CmSha1_80, kCryptexKey, {})); CopyOnWriteBuffer packet(kPacket, sizeof(kPacket), sizeof(kPacket) + 10); EXPECT_TRUE(s1_.ProtectRtp(packet)); // Sender is enabling and requiring cryptex. EXPECT_TRUE(s2_.UseCryptex(true, true, false)); EXPECT_TRUE(s2_.SetReceive(kSrtpAes128CmSha1_80, kCryptexKey, {})); EXPECT_FALSE(s2_.UnprotectRtp(packet)); } } // namespace webrtc