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 using drm::V1_0::DestinationBuffer;
35 
36 using ::android::hardware::HidlMemory;
37 
38 class IMemoryHeap;
39 
40 namespace android {
41 
42 struct CryptoHal : public ICrypto {
43     CryptoHal();
44     virtual ~CryptoHal();
45 
46     virtual status_t initCheck() const;
47 
48     virtual bool isCryptoSchemeSupported(const uint8_t uuid[16]);
49 
50     virtual status_t createPlugin(
51             const uint8_t uuid[16], const void *data, size_t size);
52 
53     virtual status_t destroyPlugin();
54 
55     virtual bool requiresSecureDecoderComponent(
56             const char *mime) const;
57 
58     virtual void notifyResolution(uint32_t width, uint32_t height);
59 
60     virtual status_t setMediaDrmSession(const Vector<uint8_t> &sessionId);
61 
62     virtual ssize_t decrypt(const uint8_t key[16], const uint8_t iv[16],
63             CryptoPlugin::Mode mode, const CryptoPlugin::Pattern &pattern,
64             const ::SharedBuffer &source, size_t offset,
65             const CryptoPlugin::SubSample *subSamples, size_t numSubSamples,
66             const ::DestinationBuffer &destination,
67             AString *errorDetailMsg);
68 
setHeapCryptoHal69     virtual int32_t setHeap(const sp<HidlMemory>& heap) {
70         return setHeapBase(heap);
71     }
unsetHeapCryptoHal72     virtual void unsetHeap(int32_t seqNum) { clearHeapBase(seqNum); }
73 
74 private:
75     mutable Mutex mLock;
76 
77     const Vector<sp<ICryptoFactory>> mFactories;
78     sp<ICryptoPlugin> mPlugin;
79     sp<drm::V1_2::ICryptoPlugin> mPluginV1_2;
80 
81     /**
82      * mInitCheck is:
83      *   NO_INIT if a plugin hasn't been created yet
84      *   ERROR_UNSUPPORTED if a plugin can't be created for the uuid
85      *   OK after a plugin has been created and mPlugin is valid
86      */
87     status_t mInitCheck;
88 
89     KeyedVector<int32_t, size_t> mHeapSizes;
90     int32_t mHeapSeqNum;
91 
92     Vector<sp<ICryptoFactory>> makeCryptoFactories();
93     sp<ICryptoPlugin> makeCryptoPlugin(const sp<ICryptoFactory>& factory,
94             const uint8_t uuid[16], const void *initData, size_t size);
95 
96     int32_t setHeapBase(const sp<HidlMemory>& heap);
97     void clearHeapBase(int32_t seqNum);
98 
99     status_t checkSharedBuffer(const ::SharedBuffer& buffer);
100 
101     DISALLOW_EVIL_CONSTRUCTORS(CryptoHal);
102 };
103 
104 }  // namespace android
105 
106 #endif  // CRYPTO_HAL_H_
107