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#include <binder/IInterface.h>
18#include <cutils/native_handle.h>
19#include <media/hardware/CryptoAPI.h>
20#include <media/stagefright/foundation/ABase.h>
21
22#ifndef ANDROID_ICRYPTO_H_
23
24#define ANDROID_ICRYPTO_H_
25
26namespace android {
27
28struct AString;
29class IMemory;
30class IMemoryHeap;
31
32struct ICrypto : public IInterface {
33    DECLARE_META_INTERFACE(Crypto);
34
35    virtual status_t initCheck() const = 0;
36
37    virtual bool isCryptoSchemeSupported(const uint8_t uuid[16]) = 0;
38
39    virtual status_t createPlugin(
40            const uint8_t uuid[16], const void *data, size_t size) = 0;
41
42    virtual status_t destroyPlugin() = 0;
43
44    virtual bool requiresSecureDecoderComponent(
45            const char *mime) const = 0;
46
47    virtual void notifyResolution(uint32_t width, uint32_t height) = 0;
48
49    virtual status_t setMediaDrmSession(const Vector<uint8_t> &sessionId) = 0;
50
51    struct SourceBuffer {
52        sp<IMemory> mSharedMemory;
53        int32_t mHeapSeqNum;
54    };
55
56    enum DestinationType {
57        kDestinationTypeSharedMemory, // non-secure
58        kDestinationTypeNativeHandle  // secure
59    };
60
61    struct DestinationBuffer {
62        DestinationType mType;
63        native_handle_t *mHandle;
64        sp<IMemory> mSharedMemory;
65    };
66
67    virtual ssize_t decrypt(const uint8_t key[16], const uint8_t iv[16],
68            CryptoPlugin::Mode mode, const CryptoPlugin::Pattern &pattern,
69            const SourceBuffer &source, size_t offset,
70            const CryptoPlugin::SubSample *subSamples, size_t numSubSamples,
71            const DestinationBuffer &destination, AString *errorDetailMsg) = 0;
72
73    /**
74     * Declare the heap that the shared memory source buffers passed
75     * to decrypt will be allocated from. Returns a sequence number
76     * that subsequent decrypt calls can use to refer to the heap,
77     * with -1 indicating failure.
78     */
79    virtual int32_t setHeap(const sp<IMemoryHeap>& heap) = 0;
80    virtual void unsetHeap(int32_t seqNum) = 0;
81
82private:
83    DISALLOW_EVIL_CONSTRUCTORS(ICrypto);
84};
85
86struct BnCrypto : public BnInterface<ICrypto> {
87    virtual status_t onTransact(
88            uint32_t code, const Parcel &data, Parcel *reply,
89            uint32_t flags = 0);
90private:
91    void readVector(const Parcel &data, Vector<uint8_t> &vector) const;
92    void writeVector(Parcel *reply, Vector<uint8_t> const &vector) const;
93};
94
95}  // namespace android
96
97#endif // ANDROID_ICRYPTO_H_
98