Crypto.h revision 5beac28a34e557251bd4bbd77a6d9303a69d4319 
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
27namespace android {
28
29struct CryptoFactory;
30struct CryptoPlugin;
31
32struct 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 ssize_t decrypt(
49            bool secure,
50            const uint8_t key[16],
51            const uint8_t iv[16],
52            CryptoPlugin::Mode mode,
53            const void *srcPtr,
54            const CryptoPlugin::SubSample *subSamples, size_t numSubSamples,
55            void *dstPtr,
56            AString *errorDetailMsg);
57
58private:
59    mutable Mutex mLock;
60
61    status_t mInitCheck;
62    sp<SharedLibrary> mLibrary;
63    CryptoFactory *mFactory;
64    CryptoPlugin *mPlugin;
65
66    static KeyedVector<Vector<uint8_t>, String8> mUUIDToLibraryPathMap;
67    static KeyedVector<String8, wp<SharedLibrary> > mLibraryPathToOpenLibraryMap;
68    static Mutex mMapLock;
69
70    void findFactoryForScheme(const uint8_t uuid[16]);
71    bool loadLibraryForScheme(const String8 &path, const uint8_t uuid[16]);
72    void closeFactory();
73
74    DISALLOW_EVIL_CONSTRUCTORS(Crypto);
75};
76
77}  // namespace android
78
79#endif  // CRYPTO_H_
80