Drm.h revision 8856c8b8777d0e0de11b2de863a336b001024e29 
1/*
2 * Copyright (C) 2013 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#ifndef DRM_H_
18
19#define DRM_H_
20
21#include "SharedLibrary.h"
22
23#include <media/IDrm.h>
24#include <utils/threads.h>
25
26namespace android {
27
28struct DrmFactory;
29struct DrmPlugin;
30
31struct Drm : public BnDrm {
32    Drm();
33    virtual ~Drm();
34
35    virtual status_t initCheck() const;
36
37    virtual bool isCryptoSchemeSupported(const uint8_t uuid[16]);
38
39    virtual status_t createPlugin(const uint8_t uuid[16]);
40
41    virtual status_t destroyPlugin();
42
43    virtual status_t openSession(Vector<uint8_t> &sessionId);
44
45    virtual status_t closeSession(Vector<uint8_t> const &sessionId);
46
47    virtual status_t
48        getKeyRequest(Vector<uint8_t> const &sessionId,
49                      Vector<uint8_t> const &initData,
50                      String8 const &mimeType, DrmPlugin::KeyType keyType,
51                      KeyedVector<String8, String8> const &optionalParameters,
52                      Vector<uint8_t> &request, String8 &defaultUrl);
53
54    virtual status_t provideKeyResponse(Vector<uint8_t> const &sessionId,
55                                        Vector<uint8_t> const &response,
56                                        Vector<uint8_t> &keySetId);
57
58    virtual status_t removeKeys(Vector<uint8_t> const &keySetId);
59
60    virtual status_t restoreKeys(Vector<uint8_t> const &sessionId,
61                                 Vector<uint8_t> const &keySetId);
62
63    virtual status_t queryKeyStatus(Vector<uint8_t> const &sessionId,
64                                    KeyedVector<String8, String8> &infoMap) const;
65
66    virtual status_t getProvisionRequest(Vector<uint8_t> &request,
67                                         String8 &defaulUrl);
68
69    virtual status_t provideProvisionResponse(Vector<uint8_t> const &response);
70
71    virtual status_t getSecureStops(List<Vector<uint8_t> > &secureStops);
72
73    virtual status_t releaseSecureStops(Vector<uint8_t> const &ssRelease);
74
75    virtual status_t getPropertyString(String8 const &name, String8 &value ) const;
76    virtual status_t getPropertyByteArray(String8 const &name,
77                                          Vector<uint8_t> &value ) const;
78    virtual status_t setPropertyString(String8 const &name, String8 const &value ) const;
79    virtual status_t setPropertyByteArray(String8 const &name,
80                                          Vector<uint8_t> const &value ) const;
81
82    virtual status_t setCipherAlgorithm(Vector<uint8_t> const &sessionId,
83                                        String8 const &algorithm);
84
85    virtual status_t setMacAlgorithm(Vector<uint8_t> const &sessionId,
86                                     String8 const &algorithm);
87
88    virtual status_t encrypt(Vector<uint8_t> const &sessionId,
89                             Vector<uint8_t> const &keyId,
90                             Vector<uint8_t> const &input,
91                             Vector<uint8_t> const &iv,
92                             Vector<uint8_t> &output);
93
94    virtual status_t decrypt(Vector<uint8_t> const &sessionId,
95                             Vector<uint8_t> const &keyId,
96                             Vector<uint8_t> const &input,
97                             Vector<uint8_t> const &iv,
98                             Vector<uint8_t> &output);
99
100    virtual status_t sign(Vector<uint8_t> const &sessionId,
101                          Vector<uint8_t> const &keyId,
102                          Vector<uint8_t> const &message,
103                          Vector<uint8_t> &signature);
104
105    virtual status_t verify(Vector<uint8_t> const &sessionId,
106                            Vector<uint8_t> const &keyId,
107                            Vector<uint8_t> const &message,
108                            Vector<uint8_t> const &signature,
109                            bool &match);
110
111private:
112    mutable Mutex mLock;
113
114    status_t mInitCheck;
115    sp<SharedLibrary> mLibrary;
116    DrmFactory *mFactory;
117    DrmPlugin *mPlugin;
118
119    static KeyedVector<Vector<uint8_t>, String8> mUUIDToLibraryPathMap;
120    static KeyedVector<String8, wp<SharedLibrary> > mLibraryPathToOpenLibraryMap;
121    static Mutex mMapLock;
122
123    void findFactoryForScheme(const uint8_t uuid[16]);
124    bool loadLibraryForScheme(const String8 &path, const uint8_t uuid[16]);
125    void closeFactory();
126
127
128    DISALLOW_EVIL_CONSTRUCTORS(Drm);
129};
130
131}  // namespace android
132
133#endif  // CRYPTO_H_
134