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      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