268 lines
9.8 KiB
C++
268 lines
9.8 KiB
C++
// Copyright 2014 Google Inc. All rights reserved.
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//
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file or at
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// https://developers.google.com/open-source/licenses/bsd
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#include "media/base/widevine_encryption_key_source.h"
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#include "base/base64.h"
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#include "base/strings/stringprintf.h"
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#include "media/base/http_fetcher.h"
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#include "media/base/request_signer.h"
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#include "media/base/status_test_util.h"
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#include "testing/gmock/include/gmock/gmock.h"
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#include "testing/gtest/include/gtest/gtest.h"
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namespace {
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const char kServerUrl[] = "http://www.foo.com/getcontentkey";
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const char kContentId[] = "ContentFoo";
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const char kSignerName[] = "SignerFoo";
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const char kMockSignature[] = "MockSignature";
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// The license service may return an error indicating a transient error has
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// just happened in the server, or other types of errors.
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// WidevineEncryptionKeySource will perform a number of retries on transient
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// errors;
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// WidevineEncryptionKeySource does not know about other errors and retries are
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// not performed.
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const char kLicenseStatusTransientError[] = "INTERNAL_ERROR";
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const char kLicenseStatusUnknownError[] = "UNKNOWN_ERROR";
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const char kExpectedRequestMessageFormat[] =
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"{\"content_id\":\"%s\",\"drm_types\":[\"WIDEVINE\"],\"policy\":\"\","
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"\"tracks\":[{\"type\":\"SD\"},{\"type\":\"HD\"},{\"type\":\"AUDIO\"}]}";
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const char kExpectedSignedMessageFormat[] =
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"{\"request\":\"%s\",\"signature\":\"%s\",\"signer\":\"%s\"}";
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const char kTrackFormat[] =
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"{\"type\":\"%s\",\"key_id\":\"%s\",\"key\":"
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"\"%s\",\"pssh\":[{\"drm_type\":\"WIDEVINE\",\"data\":\"%s\"}]}";
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const char kLicenseResponseFormat[] = "{\"status\":\"%s\",\"tracks\":[%s]}";
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const char kHttpResponseFormat[] = "{\"response\":\"%s\"}";
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std::string Base64Encode(const std::string& input) {
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std::string output;
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base::Base64Encode(input, &output);
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return output;
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}
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std::string ToString(const std::vector<uint8> v) {
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return std::string(v.begin(), v.end());
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}
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std::string GetMockKeyId(const std::string& track_type) {
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return "MockKeyId" + track_type;
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}
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std::string GetMockKey(const std::string& track_type) {
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return "MockKey" + track_type;
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}
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std::string GetMockPsshData(const std::string& track_type) {
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return "MockPsshData" + track_type;
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}
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std::string GenerateMockLicenseResponse() {
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const std::string kTrackTypes[] = {"SD", "HD", "AUDIO"};
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std::string tracks;
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for (size_t i = 0; i < 3; ++i) {
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if (!tracks.empty())
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tracks += ",";
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tracks += base::StringPrintf(
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kTrackFormat,
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kTrackTypes[i].c_str(),
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Base64Encode(GetMockKeyId(kTrackTypes[i])).c_str(),
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Base64Encode(GetMockKey(kTrackTypes[i])).c_str(),
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Base64Encode(GetMockPsshData(kTrackTypes[i])).c_str());
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}
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return base::StringPrintf(kLicenseResponseFormat, "OK", tracks.c_str());
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}
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std::string GetPsshDataFromPsshBox(const std::string& pssh_box) {
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const size_t kPsshDataOffset = 32u;
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DCHECK_LT(kPsshDataOffset, pssh_box.size());
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return pssh_box.substr(kPsshDataOffset);
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}
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} // namespace
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using ::testing::_;
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using ::testing::DoAll;
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using ::testing::Return;
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using ::testing::SetArgPointee;
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namespace media {
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class MockRequestSigner : public RequestSigner {
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public:
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explicit MockRequestSigner(const std::string& signer_name)
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: RequestSigner(signer_name) {}
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virtual ~MockRequestSigner() {}
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MOCK_METHOD2(GenerateSignature,
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bool(const std::string& message, std::string* signature));
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private:
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DISALLOW_COPY_AND_ASSIGN(MockRequestSigner);
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};
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class MockHttpFetcher : public HttpFetcher {
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public:
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MockHttpFetcher() : HttpFetcher() {}
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virtual ~MockHttpFetcher() {}
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MOCK_METHOD2(Get, Status(const std::string& url, std::string* response));
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MOCK_METHOD3(Post,
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Status(const std::string& url,
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const std::string& data,
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std::string* response));
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private:
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DISALLOW_COPY_AND_ASSIGN(MockHttpFetcher);
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};
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class WidevineEncryptionKeySourceTest : public ::testing::Test {
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public:
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WidevineEncryptionKeySourceTest()
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: mock_request_signer_(new MockRequestSigner(kSignerName)),
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mock_http_fetcher_(new MockHttpFetcher()) {}
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protected:
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void CreateWidevineEncryptionKeySource() {
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widevine_encryption_key_source_.reset(new WidevineEncryptionKeySource(
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kServerUrl, kContentId, mock_request_signer_.PassAs<RequestSigner>()));
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widevine_encryption_key_source_->set_http_fetcher(
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mock_http_fetcher_.PassAs<HttpFetcher>());
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}
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scoped_ptr<MockRequestSigner> mock_request_signer_;
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scoped_ptr<MockHttpFetcher> mock_http_fetcher_;
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scoped_ptr<WidevineEncryptionKeySource> widevine_encryption_key_source_;
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private:
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DISALLOW_COPY_AND_ASSIGN(WidevineEncryptionKeySourceTest);
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};
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TEST_F(WidevineEncryptionKeySourceTest, GetTrackTypeFromString) {
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EXPECT_EQ(EncryptionKeySource::TRACK_TYPE_SD,
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EncryptionKeySource::GetTrackTypeFromString("SD"));
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EXPECT_EQ(EncryptionKeySource::TRACK_TYPE_HD,
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EncryptionKeySource::GetTrackTypeFromString("HD"));
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EXPECT_EQ(EncryptionKeySource::TRACK_TYPE_AUDIO,
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EncryptionKeySource::GetTrackTypeFromString("AUDIO"));
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EXPECT_EQ(EncryptionKeySource::TRACK_TYPE_UNKNOWN,
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EncryptionKeySource::GetTrackTypeFromString("FOO"));
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}
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TEST_F(WidevineEncryptionKeySourceTest, GeneratureSignatureFailure) {
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EXPECT_CALL(*mock_request_signer_, GenerateSignature(_, _))
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.WillOnce(Return(false));
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CreateWidevineEncryptionKeySource();
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EncryptionKey encryption_key;
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ASSERT_EQ(Status(error::INTERNAL_ERROR, "Signature generation failed."),
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widevine_encryption_key_source_->GetKey(
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EncryptionKeySource::TRACK_TYPE_SD, &encryption_key));
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}
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// Check whether expected request message and post data was generated and
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// verify the correct behavior on http failure.
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TEST_F(WidevineEncryptionKeySourceTest, HttpPostFailure) {
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std::string expected_message = base::StringPrintf(
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kExpectedRequestMessageFormat, Base64Encode(kContentId).c_str());
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EXPECT_CALL(*mock_request_signer_, GenerateSignature(expected_message, _))
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.WillOnce(DoAll(SetArgPointee<1>(kMockSignature), Return(true)));
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std::string expected_post_data =
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base::StringPrintf(kExpectedSignedMessageFormat,
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Base64Encode(expected_message).c_str(),
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Base64Encode(kMockSignature).c_str(),
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kSignerName);
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const Status kMockStatus = Status::UNKNOWN;
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EXPECT_CALL(*mock_http_fetcher_, Post(kServerUrl, expected_post_data, _))
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.WillOnce(Return(kMockStatus));
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CreateWidevineEncryptionKeySource();
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EncryptionKey encryption_key;
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ASSERT_EQ(kMockStatus,
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widevine_encryption_key_source_->GetKey(
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EncryptionKeySource::TRACK_TYPE_SD, &encryption_key));
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}
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TEST_F(WidevineEncryptionKeySourceTest, LicenseStatusOK) {
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EXPECT_CALL(*mock_request_signer_, GenerateSignature(_, _))
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.WillOnce(Return(true));
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std::string expected_response = base::StringPrintf(
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kHttpResponseFormat, Base64Encode(GenerateMockLicenseResponse()).c_str());
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EXPECT_CALL(*mock_http_fetcher_, Post(_, _, _))
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.WillOnce(DoAll(SetArgPointee<2>(expected_response), Return(Status::OK)));
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CreateWidevineEncryptionKeySource();
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EncryptionKey encryption_key;
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const std::string kTrackTypes[] = {"SD", "HD", "AUDIO"};
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for (size_t i = 0; i < 3; ++i) {
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ASSERT_OK(widevine_encryption_key_source_->GetKey(
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EncryptionKeySource::GetTrackTypeFromString(kTrackTypes[i]),
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&encryption_key));
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EXPECT_EQ(GetMockKeyId(kTrackTypes[i]), ToString(encryption_key.key_id));
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EXPECT_EQ(GetMockKey(kTrackTypes[i]), ToString(encryption_key.key));
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EXPECT_EQ(GetMockPsshData(kTrackTypes[i]),
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GetPsshDataFromPsshBox(ToString(encryption_key.pssh)));
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}
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}
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TEST_F(WidevineEncryptionKeySourceTest, RetryOnTransientError) {
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EXPECT_CALL(*mock_request_signer_, GenerateSignature(_, _))
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.WillOnce(Return(true));
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std::string mock_license_status = base::StringPrintf(
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kLicenseResponseFormat, kLicenseStatusTransientError, "");
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std::string expected_response = base::StringPrintf(
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kHttpResponseFormat, Base64Encode(mock_license_status).c_str());
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std::string expected_retried_response = base::StringPrintf(
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kHttpResponseFormat, Base64Encode(GenerateMockLicenseResponse()).c_str());
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// Retry is expected on transient error.
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EXPECT_CALL(*mock_http_fetcher_, Post(_, _, _))
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.WillOnce(DoAll(SetArgPointee<2>(expected_response), Return(Status::OK)))
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.WillOnce(DoAll(SetArgPointee<2>(expected_retried_response),
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Return(Status::OK)));
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CreateWidevineEncryptionKeySource();
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EncryptionKey encryption_key;
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ASSERT_OK(widevine_encryption_key_source_->GetKey(
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EncryptionKeySource::TRACK_TYPE_SD, &encryption_key));
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EXPECT_EQ(GetMockKeyId("SD"), ToString(encryption_key.key_id));
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EXPECT_EQ(GetMockKey("SD"), ToString(encryption_key.key));
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EXPECT_EQ(GetMockPsshData("SD"),
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GetPsshDataFromPsshBox(ToString(encryption_key.pssh)));
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}
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TEST_F(WidevineEncryptionKeySourceTest, NoRetryOnUnknownError) {
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EXPECT_CALL(*mock_request_signer_, GenerateSignature(_, _))
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.WillOnce(Return(true));
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std::string mock_license_status = base::StringPrintf(
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kLicenseResponseFormat, kLicenseStatusUnknownError, "");
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std::string mock_response = base::StringPrintf(
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kHttpResponseFormat, Base64Encode(mock_license_status).c_str());
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EXPECT_CALL(*mock_http_fetcher_, Post(_, _, _))
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.WillOnce(DoAll(SetArgPointee<2>(mock_response), Return(Status::OK)));
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CreateWidevineEncryptionKeySource();
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EncryptionKey encryption_key;
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ASSERT_EQ(
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error::SERVER_ERROR,
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widevine_encryption_key_source_->GetKey(
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EncryptionKeySource::TRACK_TYPE_SD,
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&encryption_key).error_code());
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}
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} // namespace media
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