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      1 /*
      2  * Copyright (C) 2014 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 //#define LOG_NDEBUG 0
     18 #define LOG_TAG "ClearKeyCryptoPlugin"
     19 #include <utils/Log.h>
     20 
     21 #include <media/stagefright/MediaErrors.h>
     22 #include <utils/StrongPointer.h>
     23 
     24 #include "DrmPlugin.h"
     25 
     26 #include "Session.h"
     27 
     28 namespace clearkeydrm {
     29 
     30 using android::sp;
     31 
     32 status_t DrmPlugin::openSession(Vector<uint8_t>& sessionId) {
     33     sp<Session> session = mSessionLibrary->createSession();
     34     sessionId = session->sessionId();
     35     return android::OK;
     36 }
     37 
     38 status_t DrmPlugin::closeSession(const Vector<uint8_t>& sessionId) {
     39     sp<Session> session = mSessionLibrary->findSession(sessionId);
     40     mSessionLibrary->destroySession(session);
     41     return android::OK;
     42 }
     43 
     44 status_t DrmPlugin::getKeyRequest(
     45         const Vector<uint8_t>& scope,
     46         const Vector<uint8_t>& initData,
     47         const String8& initDataType,
     48         KeyType keyType,
     49         const KeyedVector<String8, String8>& optionalParameters,
     50         Vector<uint8_t>& request,
     51         String8& defaultUrl) {
     52     UNUSED(optionalParameters);
     53     if (keyType != kKeyType_Streaming) {
     54         return android::ERROR_DRM_CANNOT_HANDLE;
     55     }
     56 
     57     sp<Session> session = mSessionLibrary->findSession(scope);
     58     defaultUrl.clear();
     59     return session->getKeyRequest(initData, initDataType, &request);
     60 }
     61 
     62 status_t DrmPlugin::provideKeyResponse(
     63         const Vector<uint8_t>& scope,
     64         const Vector<uint8_t>& response,
     65         Vector<uint8_t>& keySetId) {
     66     sp<Session> session = mSessionLibrary->findSession(scope);
     67     status_t res = session->provideKeyResponse(response);
     68     if (res == android::OK) {
     69         keySetId.clear();
     70     }
     71     return res;
     72 }
     73 
     74 status_t DrmPlugin::getPropertyString(
     75         const String8& name, String8& value) const {
     76     if (name == "vendor") {
     77         value = "Google";
     78     } else if (name == "version") {
     79         value = "1.0";
     80     } else if (name == "description") {
     81         value = "ClearKey CDM";
     82     } else if (name == "algorithms") {
     83         value = "";
     84     } else {
     85         ALOGE("App requested unknown string property %s", name.string());
     86         return android::ERROR_DRM_CANNOT_HANDLE;
     87     }
     88     return android::OK;
     89 }
     90 
     91 }  // namespace clearkeydrm
     92