| /* |
| * Copyright (C) 2010 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. |
| */ |
| |
| #ifndef __FWDLOCKGLUE_H__ |
| #define __FWDLOCKGLUE_H__ |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| /** |
| * Generates the specified number of cryptographically secure random bytes. |
| * |
| * @param[out] pBuffer A reference to the buffer that should receive the random data. |
| * @param[in] numBytes The number of random bytes to generate. |
| * |
| * @return A Boolean value indicating whether the operation was successful. |
| */ |
| int FwdLockGlue_GetRandomNumber(void *pBuffer, size_t numBytes); |
| |
| /** |
| * Performs initialization of the key-encryption key. Should be called once during startup to |
| * facilitate encryption and decryption of session keys. |
| * |
| * @return A Boolean value indicating whether the operation was successful. |
| */ |
| int FwdLockGlue_InitializeKeyEncryption(); |
| |
| /** |
| * Returns the length of the encrypted key, given the length of the plaintext key. |
| * |
| * @param[in] plaintextKeyLength The length in bytes of the plaintext key. |
| * |
| * @return The length in bytes of the encrypted key. |
| */ |
| size_t FwdLockGlue_GetEncryptedKeyLength(size_t plaintextKeyLength); |
| |
| /** |
| * Encrypts the given session key using a key-encryption key unique to this device. |
| * |
| * @param[in] pPlaintextKey A reference to the buffer containing the plaintext key. |
| * @param[in] plaintextKeyLength The length in bytes of the plaintext key. |
| * @param[out] pEncryptedKey A reference to the buffer containing the encrypted key. |
| * @param[in] encryptedKeyLength The length in bytes of the encrypted key. |
| * |
| * @return A Boolean value indicating whether the operation was successful. |
| */ |
| int FwdLockGlue_EncryptKey(const void *pPlaintextKey, |
| size_t plaintextKeyLength, |
| void *pEncryptedKey, |
| size_t encryptedKeyLength); |
| |
| /** |
| * Decrypts the given session key using a key-encryption key unique to this device. |
| * |
| * @param[in] pEncryptedKey A reference to the buffer containing the encrypted key. |
| * @param[in] encryptedKeyLength The length in bytes of the encrypted key. |
| * @param[out] pDecryptedKey A reference to the buffer containing the decrypted key. |
| * @param[in] decryptedKeyLength The length in bytes of the decrypted key. |
| * |
| * @return A Boolean value indicating whether the operation was successful. |
| */ |
| int FwdLockGlue_DecryptKey(const void *pEncryptedKey, |
| size_t encryptedKeyLength, |
| void *pDecryptedKey, |
| size_t decryptedKeyLength); |
| |
| #ifdef __cplusplus |
| } |
| #endif |
| |
| #endif // __FWDLOCKGLUE_H__ |