diff --git a/include/media/hardware/CryptoAPI.h b/include/media/hardware/CryptoAPI.h new file mode 100644 index 000000000..81d960137 --- /dev/null +++ b/include/media/hardware/CryptoAPI.h @@ -0,0 +1,86 @@ +/* + * Copyright (C) 2012 The Android Open Source Project + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#include + +#ifndef CRYPTO_API_H_ + +#define CRYPTO_API_H_ + +namespace android { + +struct CryptoPlugin; + +struct CryptoFactory { + CryptoFactory() {} + virtual ~CryptoFactory() {} + + virtual bool isCryptoSchemeSupported(const uint8_t uuid[16]) const = 0; + + virtual status_t createPlugin( + const uint8_t uuid[16], const void *data, size_t size, + CryptoPlugin **plugin) = 0; + +private: + CryptoFactory(const CryptoFactory &); + CryptoFactory &operator=(const CryptoFactory &); +}; + +struct CryptoPlugin { + enum Mode { + kMode_Unencrypted = 0, + kMode_AES_CTR = 1, + + // Neither key nor iv are being used in this mode. + // Each subsample is encrypted w/ an iv of all zeroes. + kMode_AES_WV = 2, // FIX constant + }; + + struct SubSample { + size_t mNumBytesOfClearData; + size_t mNumBytesOfEncryptedData; + }; + + CryptoPlugin() {} + virtual ~CryptoPlugin() {} + + // If this method returns false, a non-secure decoder will be used to + // decode the data after decryption. The decrypt API below will have + // to support insecure decryption of the data (secure = false) for + // media data of the given mime type. + virtual bool requiresSecureDecoderComponent(const char *mime) const = 0; + + virtual status_t decrypt( + bool secure, + const uint8_t key[16], + const uint8_t iv[16], + Mode mode, + const void *srcPtr, + const SubSample *subSamples, size_t numSubSamples, + void *dstPtr) = 0; + +private: + CryptoPlugin(const CryptoPlugin &); + CryptoPlugin &operator=(const CryptoPlugin &); +}; + +} // namespace android + +extern "C" { + extern android::CryptoFactory *createCryptoFactory(); +} + +#endif // CRYPTO_API_H_