Add support for GCM cipher suites from RFC 7714.

webrtc/pc/mediasession_unittest.cc

 /*
  *  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.
  */
 
@@ skipping 55 matching lines @@
 using cricket::NS_JINGLE_RTP;
 using cricket::MEDIA_TYPE_AUDIO;
 using cricket::MEDIA_TYPE_VIDEO;
 using cricket::MEDIA_TYPE_DATA;
 using cricket::RtpHeaderExtension;
 using cricket::SEC_DISABLED;
 using cricket::SEC_ENABLED;
 using cricket::SEC_REQUIRED;
 using rtc::CS_AES_CM_128_HMAC_SHA1_32;
 using rtc::CS_AES_CM_128_HMAC_SHA1_80;
+using rtc::CS_AEAD_AES_128_GCM;
+using rtc::CS_AEAD_AES_256_GCM;
 
 static const AudioCodec kAudioCodecs1[] = {
     AudioCodec(103, "ISAC", 16000, -1, 1),
     AudioCodec(102, "iLBC", 8000, 13300, 1),
     AudioCodec(0, "PCMU", 8000, 64000, 1),
     AudioCodec(8, "PCMA", 8000, 64000, 1),
     AudioCodec(117, "red", 8000, 0, 1),
     AudioCodec(107, "CN", 48000, 0, 1)};
 
 static const AudioCodec kAudioCodecs2[] = {
@@ skipping 351 matching lines @@
     const cricket::AudioContentDescription* audio_content_desc =
         static_cast<const cricket::AudioContentDescription*>(description);
     ASSERT(audio_content_desc != NULL);
     for (size_t i = 0; i < audio_content_desc->codecs().size(); ++i) {
       if (audio_content_desc->codecs()[i].name == "CN")
         return false;
     }
     return true;
   }
 
+  void TestVideoGcmCipher(bool gcm_offer, bool gcm_answer) {
+    MediaSessionOptions offer_opts;
+    offer_opts.recv_video = true;
+    offer_opts.crypto_options.enable_gcm_crypto_suites = gcm_offer;
+    MediaSessionOptions answer_opts;
+    answer_opts.recv_video = true;
+    answer_opts.crypto_options.enable_gcm_crypto_suites = gcm_answer;
+    f1_.set_secure(SEC_ENABLED);
+    f2_.set_secure(SEC_ENABLED);
+    rtc::scoped_ptr<SessionDescription> offer(
+        f1_.CreateOffer(offer_opts, NULL));
+    ASSERT_TRUE(offer.get() != NULL);
+    rtc::scoped_ptr<SessionDescription> answer(
+        f2_.CreateAnswer(offer.get(), answer_opts, NULL));
+    const ContentInfo* ac = answer->GetContentByName("audio");
+    const ContentInfo* vc = answer->GetContentByName("video");
+    ASSERT_TRUE(ac != NULL);
+    ASSERT_TRUE(vc != NULL);
+    EXPECT_EQ(std::string(NS_JINGLE_RTP), ac->type);
+    EXPECT_EQ(std::string(NS_JINGLE_RTP), vc->type);
+    const AudioContentDescription* acd =
+        static_cast<const AudioContentDescription*>(ac->description);
+    const VideoContentDescription* vcd =
+        static_cast<const VideoContentDescription*>(vc->description);
+    EXPECT_EQ(MEDIA_TYPE_AUDIO, acd->type());
+    EXPECT_EQ(MAKE_VECTOR(kAudioCodecsAnswer), acd->codecs());
+    EXPECT_EQ(kAutoBandwidth, acd->bandwidth());  // negotiated auto bw
+    EXPECT_NE(0U, acd->first_ssrc());             // a random nonzero ssrc
+    EXPECT_TRUE(acd->rtcp_mux());                 // negotiated rtcp-mux
+    if (gcm_offer && gcm_answer) {
+      ASSERT_CRYPTO(acd, 1U, CS_AEAD_AES_256_GCM);
+    } else {
+      ASSERT_CRYPTO(acd, 1U, CS_AES_CM_128_HMAC_SHA1_32);
+    }
+    EXPECT_EQ(MEDIA_TYPE_VIDEO, vcd->type());
+    EXPECT_EQ(MAKE_VECTOR(kVideoCodecsAnswer), vcd->codecs());
+    EXPECT_NE(0U, vcd->first_ssrc());             // a random nonzero ssrc
+    EXPECT_TRUE(vcd->rtcp_mux());                 // negotiated rtcp-mux
+    if (gcm_offer && gcm_answer) {
+      ASSERT_CRYPTO(vcd, 1U, CS_AEAD_AES_256_GCM);
+    } else {
+      ASSERT_CRYPTO(vcd, 1U, CS_AES_CM_128_HMAC_SHA1_80);
+    }
+    EXPECT_EQ(std::string(cricket::kMediaProtocolSavpf), vcd->protocol());
+  }
+
  protected:
   MediaSessionDescriptionFactory f1_;
   MediaSessionDescriptionFactory f2_;
   TransportDescriptionFactory tdf1_;
   TransportDescriptionFactory tdf2_;
 };
 
 // Create a typical audio offer, and ensure it matches what we expect.
 TEST_F(MediaSessionDescriptionFactoryTest, TestCreateAudioOffer) {
   f1_.set_secure(SEC_ENABLED);
@@ skipping 293 matching lines @@
       static_cast<const AudioContentDescription*>(ac->description);
   EXPECT_EQ(MEDIA_TYPE_AUDIO, acd->type());
   EXPECT_EQ(MAKE_VECTOR(kAudioCodecsAnswer), acd->codecs());
   EXPECT_NE(0U, acd->first_ssrc());             // a random nonzero ssrc
   EXPECT_EQ(kAutoBandwidth, acd->bandwidth());  // negotiated auto bw
   EXPECT_TRUE(acd->rtcp_mux());                 // negotiated rtcp-mux
   ASSERT_CRYPTO(acd, 1U, CS_AES_CM_128_HMAC_SHA1_32);
   EXPECT_EQ(std::string(cricket::kMediaProtocolSavpf), acd->protocol());
 }
 
+// Create a typical audio answer with GCM ciphers enabled, and ensure it
+// matches what we expect.
+TEST_F(MediaSessionDescriptionFactoryTest, TestCreateAudioAnswerGcm) {
+  f1_.set_secure(SEC_ENABLED);
+  f2_.set_secure(SEC_ENABLED);
+  MediaSessionOptions options;
+  options.crypto_options.enable_gcm_crypto_suites = true;
+  rtc::scoped_ptr<SessionDescription> offer(
+      f1_.CreateOffer(options, NULL));
+  ASSERT_TRUE(offer.get() != NULL);
+  rtc::scoped_ptr<SessionDescription> answer(
+      f2_.CreateAnswer(offer.get(), options, NULL));
+  const ContentInfo* ac = answer->GetContentByName("audio");
+  const ContentInfo* vc = answer->GetContentByName("video");
+  ASSERT_TRUE(ac != NULL);
+  ASSERT_TRUE(vc == NULL);
+  EXPECT_EQ(std::string(NS_JINGLE_RTP), ac->type);
+  const AudioContentDescription* acd =
+      static_cast<const AudioContentDescription*>(ac->description);
+  EXPECT_EQ(MEDIA_TYPE_AUDIO, acd->type());
+  EXPECT_EQ(MAKE_VECTOR(kAudioCodecsAnswer), acd->codecs());
+  EXPECT_NE(0U, acd->first_ssrc());             // a random nonzero ssrc
+  EXPECT_EQ(kAutoBandwidth, acd->bandwidth());  // negotiated auto bw
+  EXPECT_TRUE(acd->rtcp_mux());                 // negotiated rtcp-mux
+  ASSERT_CRYPTO(acd, 1U, CS_AEAD_AES_256_GCM);
+  EXPECT_EQ(std::string(cricket::kMediaProtocolSavpf), acd->protocol());
+}
+
 // Create a typical video answer, and ensure it matches what we expect.
 TEST_F(MediaSessionDescriptionFactoryTest, TestCreateVideoAnswer) {
   MediaSessionOptions opts;
   opts.recv_video = true;
   f1_.set_secure(SEC_ENABLED);
   f2_.set_secure(SEC_ENABLED);
   std::unique_ptr<SessionDescription> offer(f1_.CreateOffer(opts, NULL));
   ASSERT_TRUE(offer.get() != NULL);
   std::unique_ptr<SessionDescription> answer(
       f2_.CreateAnswer(offer.get(), opts, NULL));
@@ skipping 14 matching lines @@
   EXPECT_TRUE(acd->rtcp_mux());                 // negotiated rtcp-mux
   ASSERT_CRYPTO(acd, 1U, CS_AES_CM_128_HMAC_SHA1_32);
   EXPECT_EQ(MEDIA_TYPE_VIDEO, vcd->type());
   EXPECT_EQ(MAKE_VECTOR(kVideoCodecsAnswer), vcd->codecs());
   EXPECT_NE(0U, vcd->first_ssrc());             // a random nonzero ssrc
   EXPECT_TRUE(vcd->rtcp_mux());                 // negotiated rtcp-mux
   ASSERT_CRYPTO(vcd, 1U, CS_AES_CM_128_HMAC_SHA1_80);
   EXPECT_EQ(std::string(cricket::kMediaProtocolSavpf), vcd->protocol());
 }
 
+// Create a typical video answer with GCM ciphers enabled, and ensure it
+// matches what we expect.
+TEST_F(MediaSessionDescriptionFactoryTest, TestCreateVideoAnswerGcm) {
+  TestVideoGcmCipher(true, true);
+}
+
+// Create a typical video answer with GCM ciphers enabled for the offer only,
+// and ensure it matches what we expect.
+TEST_F(MediaSessionDescriptionFactoryTest, TestCreateVideoAnswerGcmOffer) {
+  TestVideoGcmCipher(true, false);
+}
+
+// Create a typical video answer with GCM ciphers enabled for the answer only,
+// and ensure it matches what we expect.
+TEST_F(MediaSessionDescriptionFactoryTest, TestCreateVideoAnswerGcmAnswer) {
+  TestVideoGcmCipher(false, true);
+}
+
 TEST_F(MediaSessionDescriptionFactoryTest, TestCreateDataAnswer) {
   MediaSessionOptions opts;
   opts.data_channel_type = cricket::DCT_RTP;
   f1_.set_secure(SEC_ENABLED);
   f2_.set_secure(SEC_ENABLED);
   std::unique_ptr<SessionDescription> offer(f1_.CreateOffer(opts, NULL));
   ASSERT_TRUE(offer.get() != NULL);
   std::unique_ptr<SessionDescription> answer(
       f2_.CreateAnswer(offer.get(), opts, NULL));
   const ContentInfo* ac = answer->GetContentByName("audio");
@@ skipping 13 matching lines @@
   EXPECT_TRUE(acd->rtcp_mux());                 // negotiated rtcp-mux
   ASSERT_CRYPTO(acd, 1U, CS_AES_CM_128_HMAC_SHA1_32);
   EXPECT_EQ(MEDIA_TYPE_DATA, vcd->type());
   EXPECT_EQ(MAKE_VECTOR(kDataCodecsAnswer), vcd->codecs());
   EXPECT_NE(0U, vcd->first_ssrc());             // a random nonzero ssrc
   EXPECT_TRUE(vcd->rtcp_mux());                 // negotiated rtcp-mux
   ASSERT_CRYPTO(vcd, 1U, CS_AES_CM_128_HMAC_SHA1_80);
   EXPECT_EQ(std::string(cricket::kMediaProtocolSavpf), vcd->protocol());
 }
 
+TEST_F(MediaSessionDescriptionFactoryTest, TestCreateDataAnswerGcm) {
+  MediaSessionOptions opts;
+  opts.data_channel_type = cricket::DCT_RTP;
+  opts.crypto_options.enable_gcm_crypto_suites = true;
+  f1_.set_secure(SEC_ENABLED);
+  f2_.set_secure(SEC_ENABLED);
+  rtc::scoped_ptr<SessionDescription> offer(f1_.CreateOffer(opts, NULL));
+  ASSERT_TRUE(offer.get() != NULL);
+  rtc::scoped_ptr<SessionDescription> answer(
+      f2_.CreateAnswer(offer.get(), opts, NULL));
+  const ContentInfo* ac = answer->GetContentByName("audio");
+  const ContentInfo* vc = answer->GetContentByName("data");
+  ASSERT_TRUE(ac != NULL);
+  ASSERT_TRUE(vc != NULL);
+  EXPECT_EQ(std::string(NS_JINGLE_RTP), ac->type);
+  EXPECT_EQ(std::string(NS_JINGLE_RTP), vc->type);
+  const AudioContentDescription* acd =
+      static_cast<const AudioContentDescription*>(ac->description);
+  const DataContentDescription* vcd =
+      static_cast<const DataContentDescription*>(vc->description);
+  EXPECT_EQ(MEDIA_TYPE_AUDIO, acd->type());
+  EXPECT_EQ(MAKE_VECTOR(kAudioCodecsAnswer), acd->codecs());
+  EXPECT_EQ(kAutoBandwidth, acd->bandwidth());  // negotiated auto bw
+  EXPECT_NE(0U, acd->first_ssrc());             // a random nonzero ssrc
+  EXPECT_TRUE(acd->rtcp_mux());                 // negotiated rtcp-mux
+  ASSERT_CRYPTO(acd, 1U, CS_AEAD_AES_256_GCM);
+  EXPECT_EQ(MEDIA_TYPE_DATA, vcd->type());
+  EXPECT_EQ(MAKE_VECTOR(kDataCodecsAnswer), vcd->codecs());
+  EXPECT_NE(0U, vcd->first_ssrc());             // a random nonzero ssrc
+  EXPECT_TRUE(vcd->rtcp_mux());                 // negotiated rtcp-mux
+  ASSERT_CRYPTO(vcd, 1U, CS_AEAD_AES_256_GCM);
+  EXPECT_EQ(std::string(cricket::kMediaProtocolSavpf), vcd->protocol());
+}
+
 // Verifies that the order of the media contents in the offer is preserved in
 // the answer.
 TEST_F(MediaSessionDescriptionFactoryTest, TestCreateAnswerContentOrder) {
   MediaSessionOptions opts;
 
   // Creates a data only offer.
   opts.recv_audio = false;
   opts.data_channel_type = cricket::DCT_SCTP;
   std::unique_ptr<SessionDescription> offer1(f1_.CreateOffer(opts, NULL));
   ASSERT_TRUE(offer1.get() != NULL);
@@ skipping 1535 matching lines @@
   const ContentInfo* audio_content = GetFirstAudioContent(updated_offer.get());
   const ContentInfo* video_content = GetFirstVideoContent(updated_offer.get());
   const ContentInfo* data_content = GetFirstDataContent(updated_offer.get());
   ASSERT_TRUE(audio_content != nullptr);
   ASSERT_TRUE(video_content != nullptr);
   ASSERT_TRUE(data_content != nullptr);
   EXPECT_EQ("audio_modified", audio_content->name);
   EXPECT_EQ("video_modified", video_content->name);
   EXPECT_EQ("data_modified", data_content->name);
 }