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 void notifyResolution(uint32_t width, uint32_t height);
49
50    virtual status_t setMediaDrmSession(const Vector<uint8_t> &sessionId);
51
52    virtual ssize_t decrypt(const uint8_t key[16], const uint8_t iv[16],
53            CryptoPlugin::Mode mode, const CryptoPlugin::Pattern &pattern,
54            const sp<IMemory> &source, size_t offset,
55            const CryptoPlugin::SubSample *subSamples, size_t numSubSamples,
56            const DestinationBuffer &destination, AString *errorDetailMsg);
57
58    virtual void setHeap(const sp<IMemoryHeap>&) {}
59    virtual void unsetHeap(const sp<IMemoryHeap>&) {}
60
61private:
62    mutable Mutex mLock;
63
64    status_t mInitCheck;
65    sp<SharedLibrary> mLibrary;
66    CryptoFactory *mFactory;
67    CryptoPlugin *mPlugin;
68
69    static KeyedVector<Vector<uint8_t>, String8> mUUIDToLibraryPathMap;
70    static KeyedVector<String8, wp<SharedLibrary> > mLibraryPathToOpenLibraryMap;
71    static Mutex mMapLock;
72
73    void findFactoryForScheme(const uint8_t uuid[16]);
74    bool loadLibraryForScheme(const String8 &path, const uint8_t uuid[16]);
75    void closeFactory();
76
77    DISALLOW_EVIL_CONSTRUCTORS(Crypto);
78};
79
80}  // namespace android
81
82#endif  // CRYPTO_H_
83