1 /*
2  * Copyright (C) 2017 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_HAL_H_
18 
19 #define CRYPTO_HAL_H_
20 
21 #include <android/hardware/drm/1.0/ICryptoFactory.h>
22 #include <android/hardware/drm/1.0/ICryptoPlugin.h>
23 #include <android/hardware/drm/1.1/ICryptoFactory.h>
24 #include <android/hardware/drm/1.2/ICryptoPlugin.h>
25 
26 #include <mediadrm/ICrypto.h>
27 #include <utils/KeyedVector.h>
28 #include <utils/threads.h>
29 
30 namespace drm = ::android::hardware::drm;
31 using drm::V1_0::ICryptoFactory;
32 using drm::V1_0::ICryptoPlugin;
33 using drm::V1_0::SharedBuffer;
34 
35 class IMemoryHeap;
36 
37 namespace android {
38 
39 struct CryptoHal : public BnCrypto {
40     CryptoHal();
41     virtual ~CryptoHal();
42 
43     virtual status_t initCheck() const;
44 
45     virtual bool isCryptoSchemeSupported(const uint8_t uuid[16]);
46 
47     virtual status_t createPlugin(
48             const uint8_t uuid[16], const void *data, size_t size);
49 
50     virtual status_t destroyPlugin();
51 
52     virtual bool requiresSecureDecoderComponent(
53             const char *mime) const;
54 
55     virtual void notifyResolution(uint32_t width, uint32_t height);
56 
57     virtual status_t setMediaDrmSession(const Vector<uint8_t> &sessionId);
58 
59     virtual ssize_t decrypt(const uint8_t key[16], const uint8_t iv[16],
60             CryptoPlugin::Mode mode, const CryptoPlugin::Pattern &pattern,
61             const ICrypto::SourceBuffer &source, size_t offset,
62             const CryptoPlugin::SubSample *subSamples, size_t numSubSamples,
63             const ICrypto::DestinationBuffer &destination,
64             AString *errorDetailMsg);
65 
setHeapCryptoHal66     virtual int32_t setHeap(const sp<IMemoryHeap>& heap) {
67         return setHeapBase(heap);
68     }
unsetHeapCryptoHal69     virtual void unsetHeap(int32_t seqNum) { clearHeapBase(seqNum); }
70 
71 private:
72     mutable Mutex mLock;
73 
74     const Vector<sp<ICryptoFactory>> mFactories;
75     sp<ICryptoPlugin> mPlugin;
76     sp<drm::V1_2::ICryptoPlugin> mPluginV1_2;
77 
78     /**
79      * mInitCheck is:
80      *   NO_INIT if a plugin hasn't been created yet
81      *   ERROR_UNSUPPORTED if a plugin can't be created for the uuid
82      *   OK after a plugin has been created and mPlugin is valid
83      */
84     status_t mInitCheck;
85 
86     struct HeapBase {
HeapBaseCryptoHal::HeapBase87         HeapBase() : mBufferId(0), mSize(0) {}
HeapBaseCryptoHal::HeapBase88         HeapBase(uint32_t bufferId, size_t size) :
89             mBufferId(bufferId), mSize(size) {}
90 
getBufferIdCryptoHal::HeapBase91         uint32_t getBufferId() const {return mBufferId;}
getSizeCryptoHal::HeapBase92         size_t getSize() const {return mSize;}
93 
94     private:
95         uint32_t mBufferId;
96         size_t mSize;
97     };
98 
99     KeyedVector<int32_t, HeapBase> mHeapBases;
100     uint32_t mNextBufferId;
101     int32_t mHeapSeqNum;
102 
103     Vector<sp<ICryptoFactory>> makeCryptoFactories();
104     sp<ICryptoPlugin> makeCryptoPlugin(const sp<ICryptoFactory>& factory,
105             const uint8_t uuid[16], const void *initData, size_t size);
106 
107     int32_t setHeapBase(const sp<IMemoryHeap>& heap);
108     void clearHeapBase(int32_t seqNum);
109 
110     status_t toSharedBuffer(const sp<IMemory>& memory, int32_t seqNum, ::SharedBuffer* buffer);
111 
112     DISALLOW_EVIL_CONSTRUCTORS(CryptoHal);
113 };
114 
115 }  // namespace android
116 
117 #endif  // CRYPTO_HAL_H_
118