content/browser/media/android/media_drm_credential_manager.cc

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "content/browser/media/android/media_drm_credential_manager.h"
   6
   7 #include "base/android/jni_android.h"
   8 #include "base/android/scoped_java_ref.h"
   9 #include "base/bind.h"
  10 #include "base/callback_helpers.h"
  11 #include "base/location.h"
  12 #include "base/message_loop/message_loop_proxy.h"
  13 #include "jni/MediaDrmCredentialManager_jni.h"
  14 #include "media/base/android/media_drm_bridge.h"
  15 #include "url/gurl.h"
  16
  17 #include "widevine_cdm_version.h"  // In SHARED_INTERMEDIATE_DIR.
  18
  19 using base::android::ScopedJavaGlobalRef;
  20
  21 namespace {
  22
  23 void MediaDrmCredentialManagerCallback(
  24     const ScopedJavaGlobalRef<jobject>& j_media_drm_credential_manager_callback,
  25     bool succeeded) {
  26   JNIEnv* env = base::android::AttachCurrentThread();
  27   content::Java_MediaDrmCredentialManagerCallback_onCredentialResetFinished(
  28       env, j_media_drm_credential_manager_callback.obj(), succeeded);
  29 }
  30
  31 }  // namespace
  32
  33 namespace content {
  34
  35 MediaDrmCredentialManager::MediaDrmCredentialManager() {};
  36
  37 MediaDrmCredentialManager::~MediaDrmCredentialManager() {};
  38
  39 // static
  40 MediaDrmCredentialManager* MediaDrmCredentialManager::GetInstance() {
  41   return Singleton<MediaDrmCredentialManager>::get();
  42 }
  43
  44 void MediaDrmCredentialManager::ResetCredentials(
  45     const ResetCredentialsCB& reset_credentials_cb) {
  46   // Ignore reset request if one is already in progress.
  47   if (!reset_credentials_cb_.is_null())
  48     return;
  49
  50   reset_credentials_cb_ = reset_credentials_cb;
  51
  52   // First reset the L3 credential.
  53   if (!ResetCredentialsInternal(media::MediaDrmBridge::SECURITY_LEVEL_3)) {
  54     // TODO(qinmin): We should post a task instead.
  55     base::ResetAndReturn(&reset_credentials_cb_).Run(false);
  56   }
  57 }
  58
  59 // static
  60 void ResetCredentials(
  61     JNIEnv* env,
  62     jclass clazz,
  63     jobject j_media_drm_credential_manager_callback) {
  64   MediaDrmCredentialManager* media_drm_credential_manager =
  65       MediaDrmCredentialManager::GetInstance();
  66
  67   ScopedJavaGlobalRef<jobject> j_scoped_media_drm_credential_manager_callback;
  68   j_scoped_media_drm_credential_manager_callback.Reset(
  69       env, j_media_drm_credential_manager_callback);
  70
  71   MediaDrmCredentialManager::ResetCredentialsCB callback_runner =
  72       base::Bind(&MediaDrmCredentialManagerCallback,
  73                  j_scoped_media_drm_credential_manager_callback);
  74
  75   media_drm_credential_manager->ResetCredentials(callback_runner);
  76 }
  77
  78 void MediaDrmCredentialManager::OnResetCredentialsCompleted(
  79     SecurityLevel security_level, bool success) {
  80   if (security_level == media::MediaDrmBridge::SECURITY_LEVEL_3 && success) {
  81     if (ResetCredentialsInternal(media::MediaDrmBridge::SECURITY_LEVEL_1))
  82       return;
  83     success = false;
  84   }
  85
  86   base::ResetAndReturn(&reset_credentials_cb_).Run(success);
  87   media_drm_bridge_.reset();
  88 }
  89
  90 bool MediaDrmCredentialManager::ResetCredentialsInternal(
  91     SecurityLevel security_level) {
  92   media_drm_bridge_ =
  93       media::MediaDrmBridge::Create(0, kWidevineKeySystem, GURL(), NULL);
  94   if (!media_drm_bridge_)
  95     return false;
  96
  97   ResetCredentialsCB reset_credentials_cb =
  98       base::Bind(&MediaDrmCredentialManager::OnResetCredentialsCompleted,
  99                  base::Unretained(this), security_level);
 100
 101   if (!media_drm_bridge_->SetSecurityLevel(security_level)) {
 102     // No need to reset credentials for unsupported |security_level|.
 103     base::MessageLoopProxy::current()->PostTask(
 104         FROM_HERE, base::Bind(reset_credentials_cb, true));
 105     return true;
 106   }
 107
 108   media_drm_bridge_->ResetDeviceCredentials(reset_credentials_cb);
 109   return true;
 110 }
 111
 112 // static
 113 bool MediaDrmCredentialManager::RegisterMediaDrmCredentialManager(JNIEnv* env) {
 114   return RegisterNativesImpl(env);
 115 }
 116
 117 }  // namespace content