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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     if (sessionId.size() == 0) {
     41         return android::BAD_VALUE;
     42     }
     43     if (session.get()) {
     44         mSessionLibrary->destroySession(session);
     45         return android::OK;
     46     }
     47     return android::ERROR_DRM_SESSION_NOT_OPENED;
     48 }
     49 
     50 status_t DrmPlugin::getKeyRequest(
     51         const Vector<uint8_t>& scope,
     52         const Vector<uint8_t>& initData,
     53         const String8& mimeType,
     54         KeyType keyType,
     55         const KeyedVector<String8, String8>& optionalParameters,
     56         Vector<uint8_t>& request,
     57         String8& defaultUrl,
     58         DrmPlugin::KeyRequestType *keyRequestType) {
     59     UNUSED(optionalParameters);
     60     if (scope.size() == 0) {
     61         return android::BAD_VALUE;
     62     }
     63     if (keyType != kKeyType_Streaming) {
     64         return android::ERROR_DRM_CANNOT_HANDLE;
     65     }
     66     *keyRequestType = DrmPlugin::kKeyRequestType_Initial;
     67     defaultUrl.clear();
     68     sp<Session> session = mSessionLibrary->findSession(scope);
     69     if (!session.get()) {
     70         return android::ERROR_DRM_SESSION_NOT_OPENED;
     71     }
     72     return session->getKeyRequest(initData, mimeType, &request);
     73 }
     74 
     75 status_t DrmPlugin::provideKeyResponse(
     76         const Vector<uint8_t>& scope,
     77         const Vector<uint8_t>& response,
     78         Vector<uint8_t>& keySetId) {
     79     if (scope.size() == 0 || response.size() == 0) {
     80         return android::BAD_VALUE;
     81     }
     82     sp<Session> session = mSessionLibrary->findSession(scope);
     83     if (!session.get()) {
     84         return android::ERROR_DRM_SESSION_NOT_OPENED;
     85     }
     86     status_t res = session->provideKeyResponse(response);
     87     if (res == android::OK) {
     88         // This is for testing AMediaDrm_setOnEventListener only.
     89         sendEvent(kDrmPluginEventVendorDefined, 0, &scope, NULL);
     90         keySetId.clear();
     91     }
     92     return res;
     93 }
     94 
     95 status_t DrmPlugin::getPropertyString(
     96         const String8& name, String8& value) const {
     97     if (name == "vendor") {
     98         value = "Google";
     99     } else if (name == "version") {
    100         value = "1.0";
    101     } else if (name == "description") {
    102         value = "ClearKey CDM";
    103     } else if (name == "algorithms") {
    104         value = "";
    105     } else if (name == "listenerTestSupport") {
    106         value = "true";
    107     } else {
    108         ALOGE("App requested unknown string property %s", name.string());
    109         return android::ERROR_DRM_CANNOT_HANDLE;
    110     }
    111     return android::OK;
    112 }
    113 
    114 }  // namespace clearkeydrm
    115