// Copyright 2013 Google Inc. All Rights Reserved.
//
// This source file provides a basic set of unit tests for the Content
// Decryption Module (CDM).  It exercises much of the API that will be
// required by the host application to get the license and keys for
// rendering protected content.

#include "cdm_test_config.h"
#include "test_host_1.h"
#include "test_util.h"

#include <getopt.h>

#include <gtest/gtest.h>

#include "clock.h"
#include "config_test_env.h"
#include "content_decryption_module.h"
#include "device_cert.h"
#include "license_request.h"
#include "log.h"
#include "properties.h"
#include "scoped_ptr.h"
#include "string_conversions.h"
#include "url_request.h"

static const int kTestPolicyRenewalDelaySeconds = 180;
static const int kDelayWaitToForRenewalMessageSeconds = 2;
static const int kHttpOk = 200;
static const int kHttpBadGateway = 502;
static const int kNumRetries = 5;
static const int kRetryBaseDelaySeconds = 3;

namespace {

// Default key system identifier.
const char kKeySystemWidevine[] = "com.widevine.alpha";

// Default mime type for key request generation.
const char kMimeType[] = "video/mp4";

// Key ID of key used to encrypt the test content.
// This is used to look up the content key.
const std::vector<uint8_t> kTestKeyId =
    wvcdm::a2b_hex("371ea35e1a985d75d198a7f41020dc23");

// Dummy encrypted data.
const std::vector<uint8_t> kInputVector1 = wvcdm::a2b_hex(
    "64ab17b3e3dfab47245c7cce4543d4fc7a26dcf248f19f9b59f3c92601440b36"
    "17c8ed0c96c656549e461f38708cd47a434066f8df28ccc28b79252eee3f9c2d"
    "7f6c68ebe40141fe818fe082ca523c03d69ddaf183a93c022327fedc5582c5ab"
    "ca9d342b71263a67f9cb2336f12108aaaef464f17177e44e9b0c4e56e61da53c"
    "2150b4405cc82d994dfd9bf4087c761956d6688a9705db4cf350381085f383c4"
    "9666d4aed135c519c1f0b5cba06e287feea96ea367bf54e7368dcf998276c6e4"
    "6497e0c50e20fef74e42cb518fe7f22ef27202428688f86404e8278587017012"
    "c1d65537c6cbd7dde04aae338d68115a9f430afc100ab83cdadf45dca39db685");
const std::vector<uint8_t> kIv1 =
    wvcdm::a2b_hex("f6f4b1e600a5b67813ed2bded913ba9f");

// Expected output for kInputVector1.
const std::vector<uint8_t> kOutputVector1 = wvcdm::a2b_hex(
    "217ce9bde99bd91e9733a1a00b9b557ac3a433dc92633546156817fae26b6e1c"
    "942ac20a89ff79f4c2f25fba99d6a44618a8c0420b27d54e3da17b77c9d43cca"
    "595d259a1e4a8b6d7744cd98c5d3f921adc252eb7d8af6b916044b676a574747"
    "8df21fdc42f166880d97a2225cd5c9ea5e7b752f4cf81bbdbe98e542ee10e1c6"
    "ad868a6ac55c10d564fc23b8acff407daaf4ed2743520e02cda9680d9ea88e91"
    "029359c4cf5906b6ab5bf60fbb3f1a1c7c59acfc7e4fb4ad8e623c04d503a3dd"
    "4884604c8da8a53ce33db9ff8f1c5bb6bb97f37b39906bf41596555c1bcce9ed"
    "08a899cd760ff0899a1170c2f224b9c52997a0785b7fe170805fd3e8b1127659");

// Dummy encrypted data.  This is a combination of clear and encrypted data.
const std::vector<uint8_t> kInputVector2 = wvcdm::a2b_hex(
    // subsample 0
    "abcdef"
    "53cc758763904ea5870458e6b23d36db1e6d7f7aaa2f3eeebb5393a7264991e7"
    "ce4f57b198326e1a208a821799b2a29c90567ab57321b06e51fc20dc9bc5fc55"
    "10720a8bb1f5e002c3e50ff70d2d806a9432cad237050d09581f5b0d59b00090"
    "b3ad69b4087f5a155b17e13c44d33fa007475d207fc4ac2ef3b571ecb9"
    // subsample 1
    "0123456789"
    "f3c852"
    "ce00dc4806f0c6856ae1732e20308096478e1d822d75c2bb768119565d3bd6e6"
    "901e36164f4802355ee758fc46ef6cf5f852dd5256c7b1e5f96d29"
    // subsample 2
    "deadbeefbaadf00d"
    "3b20525d5e"
    "78b8e5aa344d5c4e425e67ddf889ea7c4bb1d49af67eba67718b765e0a940402"
    "8d306f4ce693ad6dc0a931d507fa14fff4d293d4170280b3e0fca2d628f722e8"
);
const std::vector<uint8_t> kIv2 =
    wvcdm::a2b_hex("6ba18dd40f49da7f64c368e4db43fc88");

// Expected output for kInputVector2.
const std::vector<uint8_t> kOutputVector2 = wvcdm::a2b_hex(
    // subsample 0
    "abcdef"
    "52e65334501acadf78e2b26460def3ac973771ed7c64001a2e82917342a7eab3"
    "047f5e85449692fae8f677be425a47bdea850df5a3ffff17043afb1f2b437ab2"
    "b1d5e0784c4ed8f97fc24b8f565e85ed63fb7d1365980d9aea7b8b58f488f83c"
    "1ce80b6096c60f3b113c988ff185b26e798da8fc6f327e4ff00e4b3fbf"
    // subsample 1
    "0123456789"
    "b1ed0a"
    "a054bce40ccb0ebc70b181d1a12055f46ac55e29c7c2473a29d2a366d240ec48"
    "7cede274f012813a877f99159e7062b6a37cfc9327a7bc2195814e"
    // subsample 2
    "deadbeefbaadf00d"
    "653b818d1d"
    "4ab9a9128361d8ca6a9d2766df5c096ee29f4f5204febdf217a94a5b560cd692"
    "cc36d3e071df789fdeac2fb7ec6dcd7af94bb1f85c22025b25e702e38212b927"
);

// Dummy encrypted data.  This will be decrypted with a data_offset
// instead of subsamples.
const std::vector<uint8_t> kInputVector3 = wvcdm::a2b_hex(
    "64ab17b3e3dfab47245c7cce4543d4fc7a26dcf248f19f9b59f3c92601440b36"
    "17c8ed0c96c656549e461f38708cd47a434066f8df28ccc28b79252eee3f9c2d"
    "7f6c68ebe40141fe818fe082ca523c03d69ddaf183a93c022327fedc5582c5ab"
    "ca9d342b71263a67f9cb2336f12108aaaef464f17177e44e9b0c4e56e61da53c"
    "2150b4405cc82d994dfd9bf4087c761956d6688a9705db4cf350381085f383c4"
    "9666d4aed135c519c1f0b5cba06e287feea96ea367bf54e7368dcf998276c6e4"
    "6497e0c50e20fef74e42cb518fe7f22ef27202428688f86404e8278587017012"
    "c1d65537c6cbd7dde04aae338d68115a9f430afc100ab83cdadf45dca39db685");
const std::vector<uint8_t> kIv3 =
    wvcdm::a2b_hex("f6f4b1e600a5b67813ed2bded913ba9f");

// The data_offset for kInputVector3.
const uint32_t kInputOffset3 = 9;

// Expected output for kInputVector3 offset by kInputOffset3.
const std::vector<uint8_t> kOutputVector3 = wvcdm::a2b_hex(
    "19ab304b49908e2395b32f26bf471adf4a4bc92f9e999cca8476d24a257931b4"
    "c5fd177693ed55e31cd2b85dc196b2b722cd8854eb9334f3dab0b5bd26aa5e66"
    "a9d1cfbba877c9456b11dc99a6bdc7015ca1544f7ce66171a8179eca19efe515"
    "8c4c1d0612dff64100387065da108fdbfcc14738202ac3d27520eb48c020ddb7"
    "714dca22e5e2241aff6932dba1587a97ac1a952827d411d8582dfecc2e9e1494"
    "644046ca7044bc41c3c5e0a3a405d5551f3f5bdd6f36042e2f0f3693778b9277"
    "6ed8d106647a7539df7d30288803cd9ca1c274bebe688151c72b451f571a441f"
    "83d0ff77d8d57dcb395122e175f4944569917627d6c3dc");

void* GetCdmHost(int host_interface_version, void* user_data) {
  if (host_interface_version != cdm::Host_1::kVersion) return NULL;
  return user_data;
}

}  // namespace

namespace wvcdm {

class CdmApi1Test : public testing::Test {
 public:
  CdmApi1Test() : cdm_(NULL) {}
  ~CdmApi1Test() {}

 protected:
  virtual void SetUp() {
    // Create the Host.
    host_.reset(new TestHost_1());

    // Set various parameters that the CDM will query.
    host_->SetPlatformString("SecurityLevel", "L1");
    host_->SetPlatformString("PrivacyOn", "False");
    std::string cert(reinterpret_cast<const char*>(kDeviceCert),
                     kDeviceCertSize);
    host_->SetPlatformString("DeviceCertificate", cert);

    // Initialize the CDM module before creating a CDM instance.
    InitializeCdmModule();

    // Create the CDM.
    cdm_ =
        reinterpret_cast<cdm::ContentDecryptionModule_1*>(::CreateCdmInstance(
            cdm::ContentDecryptionModule_1::kVersion, kKeySystemWidevine,
            strlen(kKeySystemWidevine), GetCdmHost, host_.get()));

    // Tell the Host about the CDM.
    host_->SetCdmPtr(cdm_);
  }

  cdm::Status GenerateKeyRequest(const std::string& init_data) {
    cdm::Status status = cdm_->GenerateKeyRequest(
        kMimeType, strlen(kMimeType),
        (const uint8_t*)init_data.data(), init_data.length());
    return status;
  }

  cdm::Status GenerateKeyRequestWithMimeType(const std::string& mime_type) {
    cdm::Status status = cdm_->GenerateKeyRequest(
        mime_type.c_str(), mime_type.length(),
        (const uint8_t*)g_key_id.data(), g_key_id.length());
    return status;
  }

  // posts a request and extracts the drm message from the response
  std::string GetKeyRequestResponse(const TestHost_1::KeyMessage& key_msg) {
    std::string url;
    if (key_msg.default_url.empty()) {
      url = g_license_server + g_client_auth;
    } else {
      // Note that the client auth string is not appended when the CDM tells
      // us what URL to use.
      url = key_msg.default_url;
    }

    int status_code;
    std::string response;
    UrlRequest url_request(url);

    for (int retries = 0; retries < kNumRetries; ++retries) {
      EXPECT_TRUE(url_request.is_connected());
      if (!url_request.is_connected()) {
        return "";
      }

      url_request.PostRequest(key_msg.message);
      int resp_bytes = url_request.GetResponse(&response);

      status_code = url_request.GetStatusCode(response);
      // Sometimes, the server returns "HTTP 502 bad gateway".
      // If we treat this as a non-fatal error, we reduce test flakiness.
      if (status_code != kHttpBadGateway) {
        // Move on with normal processing.
        break;
      }

      // Reconnect to the server and try again.  Since the server's 502
      // response could indicate a temporary failure due to load, we use
      // an exponential backoff.  Each time we reconnect, we delay by
      // exactly twice as long as the last time.  This is a simplified
      // version of the delay strategy recommended by Google in the
      // internal document "Rate Limiting in Google Applications" under
      // the heading "Settings for client exponential backoff".  We do
      // not bother to fuzz the delay, since unit tests are not running
      // simultaneously in large numbers like real clients would be.
      LOGE("Bad gateway, retrying.");
      sleep(kRetryBaseDelaySeconds << retries);
      url_request.Reconnect();
    }

    // Some license servers return 400 for invalid message, some
    // return 500; treat anything other than 200 as an invalid message.
    EXPECT_EQ(kHttpOk, status_code);

    if (status_code != kHttpOk) {
      return "";
    } else {
      std::string drm_msg;
      LicenseRequest lic_request;
      lic_request.GetDrmMessage(response, drm_msg);
      LOGV("drm msg: %u bytes\n%s", drm_msg.size(),
           HexEncode(reinterpret_cast<const uint8_t*>(drm_msg.data()),
                     drm_msg.size()).c_str());
      return drm_msg;
    }
  }

  void ProcessKeyResponse() {
    TestHost_1::KeyMessage key_msg = host_->GetLastKeyMessage();
    ASSERT_FALSE(key_msg.message.empty());
    EXPECT_TRUE(key_msg.default_url.empty());
    std::string drm_msg = GetKeyRequestResponse(key_msg);
    EXPECT_EQ(cdm::kSuccess, AddKey(key_msg.session_id, drm_msg));
  }

  void ProcessKeyRenewalResponse() {
    TestHost_1::KeyMessage key_msg = host_->GetLastKeyMessage();
    ASSERT_FALSE(key_msg.message.empty());
    EXPECT_FALSE(key_msg.default_url.empty());
    std::string drm_msg = GetKeyRequestResponse(key_msg);
    EXPECT_EQ(cdm::kSuccess, AddKey(key_msg.session_id, drm_msg));
  }

  void CloseSession(const std::string& session_id) {
    cdm::Status status =
        cdm_->CloseSession(session_id.data(), session_id.length());
    EXPECT_EQ(cdm::kSuccess, status);
  }

  cdm::Status AddKey(const std::string& session_id,
                     const std::string& drm_msg) {
    cdm::Status status =
        cdm_->AddKey(session_id.data(), session_id.size(),
                     (const uint8_t*)drm_msg.data(), drm_msg.size(), NULL, 0);
    return status;
  }

  cdm::InputBuffer BuildInputBuffer(const std::vector<uint8_t>& encrypted,
                                    const std::vector<uint8_t>& iv) {
    cdm::InputBuffer buf;
    buf.data = &encrypted[0];
    buf.data_size = encrypted.size();
    buf.key_id = &kTestKeyId[0];
    buf.key_id_size = kTestKeyId.size();
    buf.iv = &iv[0];
    buf.iv_size = iv.size();
    buf.data_offset = 0;
    buf.timestamp = 10;
    return buf;
  }

  cdm::InputBuffer BuildInputBuffer(
      const std::vector<uint8_t>& encrypted,
      const std::vector<uint8_t>& iv,
      const std::vector<cdm::SubsampleEntry>& sub) {
    cdm::InputBuffer buf = BuildInputBuffer(encrypted, iv);
    buf.subsamples = &sub[0];
    buf.num_subsamples = sub.size();
    return buf;
  }

  cdm::InputBuffer BuildInputBuffer(
      const std::vector<uint8_t>& encrypted,
      const std::vector<uint8_t>& iv,
      const uint32_t offset) {
    cdm::InputBuffer buf = BuildInputBuffer(encrypted, iv);
    buf.data_offset = offset;
    return buf;
  }

  std::vector<cdm::SubsampleEntry> BuildMultipleSubsamples() {
    std::vector<cdm::SubsampleEntry> sub;
    sub.push_back(cdm::SubsampleEntry(3, 125));
    sub.push_back(cdm::SubsampleEntry(5, 62));
    sub.push_back(cdm::SubsampleEntry(8, 69));
    return sub;
  }

  std::vector<cdm::SubsampleEntry> BuildSingleSubsample(size_t size) {
    std::vector<cdm::SubsampleEntry> sub;
    sub.push_back(cdm::SubsampleEntry(0, size));
    return sub;
  }

  cdm::ContentDecryptionModule_1* cdm_;  // owned by host_
  wvcdm::scoped_ptr<TestHost_1> host_;
};

namespace {

class DummyCDM : public cdm::ContentDecryptionModule_1 {
 public:
  DummyCDM() : timer_fired_(false), last_context_(NULL) {}

  virtual cdm::Status GenerateKeyRequest(const char*, int, const uint8_t*,
                                         int) OVERRIDE {
    return cdm::kSessionError;
  }

  virtual cdm::Status AddKey(const char*, int, const uint8_t*, int,
                             const uint8_t*, int) OVERRIDE {
    return cdm::kSessionError;
  }

  virtual bool IsKeyValid(const uint8_t*, int) OVERRIDE { return false; }

  virtual cdm::Status CloseSession(const char*, int) OVERRIDE {
    return cdm::kSessionError;
  }

  virtual void TimerExpired(void* context) OVERRIDE {
    timer_fired_ = true;
    last_context_ = context;
  }

  virtual cdm::Status Decrypt(const cdm::InputBuffer&,
                              cdm::DecryptedBlock*) OVERRIDE {
    return cdm::kSessionError;
  }

  virtual cdm::Status DecryptDecodeAndRenderFrame(
      const cdm::InputBuffer&) OVERRIDE {
    return cdm::kSessionError;
  }

  virtual cdm::Status DecryptDecodeAndRenderSamples(
      const cdm::InputBuffer&) OVERRIDE {
    return cdm::kSessionError;
  }

  virtual void Destroy() OVERRIDE { delete this; }

  virtual cdm::Status GetProvisioningRequest(std::string*,
                                             std::string*) OVERRIDE {
    return cdm::kSessionError;
  }

  virtual cdm::Status HandleProvisioningResponse(std::string&) OVERRIDE {
    return cdm::kSessionError;
  }

  bool TimerFired() const { return timer_fired_; }

  void* LastTimerContext() const { return last_context_; }

  void ResetTimerStatus() {
    timer_fired_ = false;
    last_context_ = NULL;
  }

 private:
  bool timer_fired_;
  void* last_context_;
};

}  // namespace

TEST_F(CdmApi1Test, TestHostTimer) {
  // Validate that the TestHost timers are processed in the correct order.
  // To do this, we replace the cdm with a dummy that only tracks timers.
  DummyCDM* cdm = new DummyCDM();

  // The old CDM is destroyed by SetCdmPtr.
  cdm_ = cdm;
  host_->SetCdmPtr(cdm);

  const double kTimerDelaySeconds = 1.0;
  const int64_t kTimerDelayMs = kTimerDelaySeconds * 1000;
  void* kCtx1 = reinterpret_cast<void*>(0x1);
  void* kCtx2 = reinterpret_cast<void*>(0x2);

  host_->SetTimer(kTimerDelayMs * 1, kCtx1);
  host_->SetTimer(kTimerDelayMs * 2, kCtx2);

  host_->FastForwardTime(kTimerDelaySeconds);
  EXPECT_TRUE(cdm->TimerFired());
  EXPECT_EQ(kCtx1, cdm->LastTimerContext());
  cdm->ResetTimerStatus();

  host_->FastForwardTime(kTimerDelaySeconds);
  EXPECT_TRUE(cdm->TimerFired());
  EXPECT_EQ(kCtx2, cdm->LastTimerContext());
  cdm->ResetTimerStatus();

  host_->FastForwardTime(kTimerDelaySeconds);
  EXPECT_FALSE(cdm->TimerFired());
}

TEST_F(CdmApi1Test, DeviceCertificateTest) {
  if (Properties::use_certificates_as_identification()) {
    // Clear any existing device cert.
    host_->SetPlatformString("DeviceCertificate", "");

    ASSERT_EQ(cdm::kNeedsDeviceCertificate, GenerateKeyRequest(g_key_id));

    // The Host must handle the certificate provisioning request.
    std::string server_url;
    std::string request;
    cdm::Status status = cdm_->GetProvisioningRequest(&request, &server_url);
    ASSERT_EQ(cdm::kSuccess, status);

    UrlRequest url_request(server_url);
    url_request.PostCertRequestInQueryString(request);

    std::string message;
    bool ok = url_request.GetResponse(&message);
    ASSERT_TRUE(ok);

    status = cdm_->HandleProvisioningResponse(message);
    ASSERT_EQ(cdm::kSuccess, status);

    // Now we are provisioned, so GKR should succeed.
    EXPECT_EQ(cdm::kSuccess, GenerateKeyRequest(g_key_id));
  } else {
    LOGI(
        "Skipping CdmApi1Test::DeviceCertificateTest because this platform "
        "does not support device certificates.");
  }
}

// Note that these tests, BaseMessageTest, NormalDecryption and RenewalTest,
// are dependent on getting back a license from the license server where the
// url for the license server is defined in the conf_test_env.cpp.  If these
// tests fail immediately, verify that the license server URL is correct
// and works in your test environment.

TEST_F(CdmApi1Test, BaseMessageTest) {
  EXPECT_EQ(cdm::kSuccess, GenerateKeyRequest(g_key_id));
  ProcessKeyResponse();
}

TEST_F(CdmApi1Test, NormalDecryption) {
  EXPECT_EQ(cdm::kSuccess, GenerateKeyRequest(g_key_id));
  ProcessKeyResponse();

  // Level 1 / Level 2 payload comes back in the cpu memory as cleartext.
  std::vector<uint8_t> encrypted = kInputVector1;
  std::vector<uint8_t> iv = kIv1;
  std::vector<uint8_t> expected = kOutputVector1;
  std::vector<cdm::SubsampleEntry> sub = BuildSingleSubsample(encrypted.size());
  cdm::InputBuffer buf = BuildInputBuffer(encrypted, iv, sub);

  TestDecryptedBlock output;
  cdm::Status status = cdm_->Decrypt(buf, &output);

  EXPECT_EQ(cdm::kSuccess, status);
  EXPECT_EQ(
      0, memcmp(output.DecryptedBuffer()->Data(), &expected[0], buf.data_size));
}

TEST_F(CdmApi1Test, NormalSubSampleDecryptionWithSubsampleInfo) {
  EXPECT_EQ(cdm::kSuccess, GenerateKeyRequest(g_key_id));
  ProcessKeyResponse();

  // Level 1 / Level 2 payload comes back in the cpu memory as cleartext.
  std::vector<uint8_t> encrypted = kInputVector2;
  std::vector<uint8_t> iv = kIv2;
  std::vector<uint8_t> expected = kOutputVector2;
  std::vector<cdm::SubsampleEntry> sub = BuildMultipleSubsamples();
  cdm::InputBuffer buf = BuildInputBuffer(encrypted, iv, sub);

  TestDecryptedBlock output;
  cdm::Status status = cdm_->Decrypt(buf, &output);

  EXPECT_EQ(cdm::kSuccess, status);
  EXPECT_EQ(
      0, memcmp(output.DecryptedBuffer()->Data(), &expected[0], buf.data_size));
}

TEST_F(CdmApi1Test, NormalSubSampleDecryptionWithMissingSubsampleInfo) {
  EXPECT_EQ(cdm::kSuccess, GenerateKeyRequest(g_key_id));
  ProcessKeyResponse();

  std::vector<uint8_t> encrypted = kInputVector2;
  std::vector<uint8_t> iv = kIv2;
  std::vector<uint8_t> expected = kOutputVector2;
  std::vector<cdm::SubsampleEntry> sub = BuildMultipleSubsamples();

  // Don't add these subsamples yet!
  cdm::InputBuffer buf = BuildInputBuffer(encrypted, iv);
  buf.num_subsamples = sub.size();

  TestDecryptedBlock output;

  cdm::Status status = cdm_->Decrypt(buf, &output);
  EXPECT_EQ(cdm::kDecryptError, status);

  // Add the subsamples pointer and expect success.
  buf.subsamples = &sub[0];
  status = cdm_->Decrypt(buf, &output);
  EXPECT_EQ(cdm::kSuccess, status);
  EXPECT_EQ(
      0, memcmp(output.DecryptedBuffer()->Data(), &expected[0], buf.data_size));
}

TEST_F(CdmApi1Test, DecryptWithDataOffset) {
  EXPECT_EQ(cdm::kSuccess, GenerateKeyRequest(g_key_id));
  ProcessKeyResponse();

  std::vector<uint8_t> encrypted = kInputVector3;
  std::vector<uint8_t> iv = kIv3;
  std::vector<uint8_t> expected = kOutputVector3;
  cdm::InputBuffer buf = BuildInputBuffer(encrypted, iv, kInputOffset3);

  TestDecryptedBlock output;
  cdm::Status status = cdm_->Decrypt(buf, &output);
  cdm::Buffer *output_buf = output.DecryptedBuffer();

  EXPECT_EQ(cdm::kSuccess, status);
  EXPECT_EQ(buf.data_size - buf.data_offset, output_buf->Size());
  EXPECT_EQ(0, memcmp(output.DecryptedBuffer()->Data(), &expected[0],
                      output_buf->Size()));
}

TEST_F(CdmApi1Test, DecryptReturnsSizedBuffer) {
  EXPECT_EQ(cdm::kSuccess, GenerateKeyRequest(g_key_id));
  ProcessKeyResponse();

  std::vector<uint8_t> encrypted = kInputVector1;
  std::vector<uint8_t> iv = kIv1;
  std::vector<uint8_t> expected = kOutputVector1;

  std::vector<cdm::SubsampleEntry> sub = BuildSingleSubsample(encrypted.size());
  cdm::InputBuffer buf = BuildInputBuffer(encrypted, iv, sub);

  TestDecryptedBlock output;
  cdm::Status status = cdm_->Decrypt(buf, &output);

  EXPECT_EQ(cdm::kSuccess, status);
  cdm::Buffer* buffer = output.DecryptedBuffer();
  EXPECT_NE((void*)NULL, buffer);
  if (buffer) {
    EXPECT_EQ(expected.size(), output.DecryptedBuffer()->Size());
  }
}

TEST_F(CdmApi1Test, RenewalTest) {
  EXPECT_EQ(cdm::kSuccess, GenerateKeyRequest(g_key_id));
  ProcessKeyResponse();

  // We expect that by the time we've added a key, the CDM has set a timer.
  // Otherwise, it couldn't correctly handle renewal.
  EXPECT_NE(0, host_->NumTimers());
  host_->FastForwardTime(kTestPolicyRenewalDelaySeconds +
                         kDelayWaitToForRenewalMessageSeconds);

  // When the timer expired, we should have sent a renewal, so we can
  // add this renewed key now, assuming things are working as expected.
  ProcessKeyRenewalResponse();
}

TEST_F(CdmApi1Test, SecureDecryptionLevel1) {
  EXPECT_EQ(cdm::kSuccess, GenerateKeyRequest(g_key_id));
  ProcessKeyResponse();

  // Level 1 passes encrypted payload straight through. By calling the
  // CDM's DecryptDecodeAndRenderSamples, and/or DecryptDecodeAndRenderFrame,
  // OEMCrypto_DecryptCTR will be told to use Direct Rendering.
  std::vector<uint8_t> encrypted = kInputVector1;
  std::vector<uint8_t> iv = kIv1;
  std::vector<cdm::SubsampleEntry> sub = BuildSingleSubsample(encrypted.size());
  cdm::InputBuffer buf = BuildInputBuffer(encrypted, iv, sub);

  cdm::Status status;

  status = cdm_->DecryptDecodeAndRenderSamples(buf);
  EXPECT_EQ(cdm::kSuccess, status);
  status = cdm_->DecryptDecodeAndRenderFrame(buf);
  EXPECT_EQ(cdm::kSuccess, status);
}

TEST_F(CdmApi1Test, SecureDecryptionLevel1WithSubsampleInfo) {
  EXPECT_EQ(cdm::kSuccess, GenerateKeyRequest(g_key_id));
  ProcessKeyResponse();

  // Level 1 passes encrypted payload straight through. By calling the
  // CDM's DecryptDecodeAndRenderSamples, and/or DecryptDecodeAndRenderFrame,
  // OEMCrypto_DecryptCTR will be told to use Direct Rendering.
  std::vector<uint8_t> encrypted = kInputVector2;
  std::vector<uint8_t> iv = kIv2;
  std::vector<cdm::SubsampleEntry> sub = BuildMultipleSubsamples();
  cdm::InputBuffer buf = BuildInputBuffer(encrypted, iv, sub);

  cdm::Status status;

  status = cdm_->DecryptDecodeAndRenderSamples(buf);
  EXPECT_EQ(cdm::kSuccess, status);
  status = cdm_->DecryptDecodeAndRenderFrame(buf);
  EXPECT_EQ(cdm::kSuccess, status);
}

TEST_F(CdmApi1Test, SecureDecryptionLevel1WithMissingSubsampleInfo) {
  EXPECT_EQ(cdm::kSuccess, GenerateKeyRequest(g_key_id));
  ProcessKeyResponse();

  std::vector<uint8_t> encrypted = kInputVector2;
  std::vector<uint8_t> iv = kIv2;
  std::vector<cdm::SubsampleEntry> sub = BuildMultipleSubsamples();

  // Don't add these subsamples yet!
  cdm::InputBuffer buf = BuildInputBuffer(encrypted, iv);
  buf.num_subsamples = sub.size();

  cdm::Status status;

  status = cdm_->DecryptDecodeAndRenderSamples(buf);
  EXPECT_EQ(cdm::kDecryptError, status);
  status = cdm_->DecryptDecodeAndRenderFrame(buf);
  EXPECT_EQ(cdm::kDecryptError, status);

  // Add the subsamples pointer and expect success.
  buf.subsamples = &sub[0];
  status = cdm_->DecryptDecodeAndRenderSamples(buf);
  EXPECT_EQ(cdm::kSuccess, status);
  status = cdm_->DecryptDecodeAndRenderFrame(buf);
  EXPECT_EQ(cdm::kSuccess, status);
}

TEST_F(CdmApi1Test, GenerateKeyRequestFailureSendsKeyError) {
  // Pass a bogus key id and expect failure.
  EXPECT_EQ(cdm::kSessionError, GenerateKeyRequest(""));
  // Expect the CDM to pass a key error back to the host.
  EXPECT_EQ(1, host_->KeyErrorsSize());
}

TEST_F(CdmApi1Test, AddKeyFailureSendsKeyError) {
  EXPECT_EQ(cdm::kSuccess, GenerateKeyRequest(g_key_id));

  // Get the message and response.
  TestHost_1::KeyMessage key_msg = host_->GetLastKeyMessage();
  EXPECT_TRUE(key_msg.default_url.empty());
  std::string drm_msg = GetKeyRequestResponse(key_msg);

  // Call AddKey with a bad session id and expect failure.
  EXPECT_EQ(cdm::kSessionError, AddKey("BLAH", drm_msg));

  // Expect the CDM to pass a key error back to the host.
  EXPECT_EQ(1, host_->KeyErrorsSize());

  // Call AddKey with a bad license and expect failure.
  EXPECT_EQ(cdm::kSessionError, AddKey(key_msg.session_id, "BLAH"));

  // Expect the CDM to pass one more key error back to the host.
  EXPECT_EQ(2, host_->KeyErrorsSize());
}

TEST_F(CdmApi1Test, MimeTypeMatters) {
  cdm::Status status;

  status = GenerateKeyRequestWithMimeType("video/mp4");
  ASSERT_EQ(cdm::kSuccess, status);

  status = GenerateKeyRequestWithMimeType("video/webm");
  ASSERT_EQ(cdm::kSuccess, status);

  status = GenerateKeyRequestWithMimeType("video/blah");
  ASSERT_EQ(cdm::kSessionError, status);
}

}  // namespace wvcdm