Add support for GCM cipher suites from RFC 7714.

talk/session/media/mediasession_unittest.cc

 /*
  * libjingle
  * Copyright 2004 Google Inc.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
  *
  *  1. Redistributions of source code must retain the above copyright notice,
  *     this list of conditions and the following disclaimer.
  *  2. Redistributions in binary form must reproduce the above copyright notice,
@@ skipping 68 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, 6),
   AudioCodec(102, "iLBC",   8000,  13300, 1, 5),
   AudioCodec(0,   "PCMU",   8000,  64000, 1, 4),
   AudioCodec(8,   "PCMA",   8000,  64000, 1, 3),
   AudioCodec(117, "red",    8000,  0,     1, 2),
   AudioCodec(107, "CN",     48000, 0,     1, 1)
 };
 
@@ skipping 364 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.enable_gcm_crypto_suites = gcm_offer;
+    MediaSessionOptions answer_opts;
+    answer_opts.recv_video = true;
+    answer_opts.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 296 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.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);
   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));
@@ 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);
   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");
@@ 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.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;
   rtc::scoped_ptr<SessionDescription> offer1(f1_.CreateOffer(opts, NULL));
   ASSERT_TRUE(offer1.get() != NULL);
@@ skipping 1440 matching lines @@
   offer.reset(f1_.CreateOffer(options, NULL));
   ASSERT_TRUE(offer.get() != NULL);
   audio_content = offer->GetContentByName("audio");
   EXPECT_TRUE(VerifyNoCNCodecs(audio_content));
   rtc::scoped_ptr<SessionDescription> answer(
       f1_.CreateAnswer(offer.get(), options, NULL));
   ASSERT_TRUE(answer.get() != NULL);
   audio_content = answer->GetContentByName("audio");
   EXPECT_TRUE(VerifyNoCNCodecs(audio_content));
 }