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 <media/stagefright/foundation/ABase.h>
19 #include <media/hardware/CryptoAPI.h>
20 
21 #ifndef ANDROID_ICRYPTO_H_
22 
23 #define ANDROID_ICRYPTO_H_
24 
25 namespace android {
26 
27 struct AString;
28 class IMemory;
29 
30 struct ICrypto : public IInterface {
31     DECLARE_META_INTERFACE(Crypto);
32 
33     virtual status_t initCheck() const = 0;
34 
35     virtual bool isCryptoSchemeSupported(const uint8_t uuid[16]) = 0;
36 
37     virtual status_t createPlugin(
38             const uint8_t uuid[16], const void *data, size_t size) = 0;
39 
40     virtual status_t destroyPlugin() = 0;
41 
42     virtual bool requiresSecureDecoderComponent(
43             const char *mime) const = 0;
44 
45     virtual void notifyResolution(uint32_t width, uint32_t height) = 0;
46 
47     virtual status_t setMediaDrmSession(const Vector<uint8_t> &sessionId) = 0;
48 
49     enum DestinationType {
50         kDestinationTypeVmPointer,    // non-secure
51         kDestinationTypeOpaqueHandle, // secure
52         kDestinationTypeNativeHandle  // secure
53     };
54 
55     virtual ssize_t decrypt(
56             DestinationType dstType,
57             const uint8_t key[16],
58             const uint8_t iv[16],
59             CryptoPlugin::Mode mode,
60             const CryptoPlugin::Pattern &pattern,
61             const sp<IMemory> &sharedBuffer, size_t offset,
62             const CryptoPlugin::SubSample *subSamples, size_t numSubSamples,
63             void *dstPtr,
64             AString *errorDetailMsg) = 0;
65 
66 private:
67     DISALLOW_EVIL_CONSTRUCTORS(ICrypto);
68 };
69 
70 struct BnCrypto : public BnInterface<ICrypto> {
71     virtual status_t onTransact(
72             uint32_t code, const Parcel &data, Parcel *reply,
73             uint32_t flags = 0);
74 private:
75     void readVector(const Parcel &data, Vector<uint8_t> &vector) const;
76     void writeVector(Parcel *reply, Vector<uint8_t> const &vector) const;
77 };
78 
79 }  // namespace android
80 
81 #endif // ANDROID_ICRYPTO_H_
82