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 
openSession(Vector<uint8_t> & sessionId)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 
closeSession(const Vector<uint8_t> & sessionId)38 status_t DrmPlugin::closeSession(const Vector<uint8_t>& sessionId) {
39     sp<Session> session = mSessionLibrary->findSession(sessionId);
40     if (session.get()) {
41         mSessionLibrary->destroySession(session);
42     }
43     return android::OK;
44 }
45 
getKeyRequest(const Vector<uint8_t> & scope,const Vector<uint8_t> & initData,const String8 & initDataType,KeyType keyType,const KeyedVector<String8,String8> & optionalParameters,Vector<uint8_t> & request,String8 & defaultUrl,DrmPlugin::KeyRequestType * keyRequestType)46 status_t DrmPlugin::getKeyRequest(
47         const Vector<uint8_t>& scope,
48         const Vector<uint8_t>& initData,
49         const String8& initDataType,
50         KeyType keyType,
51         const KeyedVector<String8, String8>& optionalParameters,
52         Vector<uint8_t>& request,
53         String8& defaultUrl,
54         DrmPlugin::KeyRequestType *keyRequestType) {
55     UNUSED(optionalParameters);
56     if (keyType != kKeyType_Streaming) {
57         return android::ERROR_DRM_CANNOT_HANDLE;
58     }
59     *keyRequestType = DrmPlugin::kKeyRequestType_Initial;
60     defaultUrl.clear();
61     sp<Session> session = mSessionLibrary->findSession(scope);
62     if (!session.get()) {
63         return android::ERROR_DRM_SESSION_NOT_OPENED;
64     }
65     return session->getKeyRequest(initData, initDataType, &request);
66 }
67 
provideKeyResponse(const Vector<uint8_t> & scope,const Vector<uint8_t> & response,Vector<uint8_t> & keySetId)68 status_t DrmPlugin::provideKeyResponse(
69         const Vector<uint8_t>& scope,
70         const Vector<uint8_t>& response,
71         Vector<uint8_t>& keySetId) {
72     sp<Session> session = mSessionLibrary->findSession(scope);
73     if (!session.get()) {
74         return android::ERROR_DRM_SESSION_NOT_OPENED;
75     }
76     status_t res = session->provideKeyResponse(response);
77     if (res == android::OK) {
78         keySetId.clear();
79     }
80     return res;
81 }
82 
getPropertyString(const String8 & name,String8 & value) const83 status_t DrmPlugin::getPropertyString(
84         const String8& name, String8& value) const {
85     if (name == "vendor") {
86         value = "Google";
87     } else if (name == "version") {
88         value = "1.0";
89     } else if (name == "description") {
90         value = "ClearKey CDM";
91     } else if (name == "algorithms") {
92         value = "";
93     } else {
94         ALOGE("App requested unknown string property %s", name.string());
95         return android::ERROR_DRM_CANNOT_HANDLE;
96     }
97     return android::OK;
98 }
99 
100 }  // namespace clearkeydrm
101