1 /*
2  * Copyright (C) 2012 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 CRYPTO_H_
18 
19 #define CRYPTO_H_
20 
21 #include <media/ICrypto.h>
22 #include <utils/threads.h>
23 #include <utils/KeyedVector.h>
24 
25 #include "SharedLibrary.h"
26 
27 namespace android {
28 
29 struct CryptoFactory;
30 struct CryptoPlugin;
31 
32 struct Crypto : public BnCrypto {
33     Crypto();
34     virtual ~Crypto();
35 
36     virtual status_t initCheck() const;
37 
38     virtual bool isCryptoSchemeSupported(const uint8_t uuid[16]);
39 
40     virtual status_t createPlugin(
41             const uint8_t uuid[16], const void *data, size_t size);
42 
43     virtual status_t destroyPlugin();
44 
45     virtual bool requiresSecureDecoderComponent(
46             const char *mime) const;
47 
48     virtual void notifyResolution(uint32_t width, uint32_t height);
49 
50     virtual ssize_t decrypt(
51             bool secure,
52             const uint8_t key[16],
53             const uint8_t iv[16],
54             CryptoPlugin::Mode mode,
55             const void *srcPtr,
56             const CryptoPlugin::SubSample *subSamples, size_t numSubSamples,
57             void *dstPtr,
58             AString *errorDetailMsg);
59 
60 private:
61     mutable Mutex mLock;
62 
63     status_t mInitCheck;
64     sp<SharedLibrary> mLibrary;
65     CryptoFactory *mFactory;
66     CryptoPlugin *mPlugin;
67 
68     static KeyedVector<Vector<uint8_t>, String8> mUUIDToLibraryPathMap;
69     static KeyedVector<String8, wp<SharedLibrary> > mLibraryPathToOpenLibraryMap;
70     static Mutex mMapLock;
71 
72     void findFactoryForScheme(const uint8_t uuid[16]);
73     bool loadLibraryForScheme(const String8 &path, const uint8_t uuid[16]);
74     void closeFactory();
75 
76     DISALLOW_EVIL_CONSTRUCTORS(Crypto);
77 };
78 
79 }  // namespace android
80 
81 #endif  // CRYPTO_H_
82