1 /* 2 * Copyright 2014 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 SYSTEM_KEYMASTER_OCB_UTILS_H_ 18 #define SYSTEM_KEYMASTER_OCB_UTILS_H_ 19 20 #include "ae.h" 21 22 #include <hardware/keymaster_defs.h> 23 24 #include <keymaster/serializable.h> 25 26 namespace keymaster { 27 28 class AuthorizationSet; 29 struct KeymasterKeyBlob; 30 31 static const int OCB_NONCE_LENGTH = 12; 32 static const int OCB_TAG_LENGTH = 16; 33 34 keymaster_error_t OcbEncryptKey(const AuthorizationSet& hw_enforced, 35 const AuthorizationSet& sw_enforced, const AuthorizationSet& hidden, 36 const KeymasterKeyBlob& master_key, 37 const KeymasterKeyBlob& plaintext, const Buffer& nonce, 38 KeymasterKeyBlob* ciphertext, Buffer* tag); 39 40 keymaster_error_t OcbDecryptKey(const AuthorizationSet& hw_enforced, 41 const AuthorizationSet& sw_enforced, const AuthorizationSet& hidden, 42 const KeymasterKeyBlob& master_key, 43 const KeymasterKeyBlob& ciphertext, const Buffer& nonce, 44 const Buffer& tag, KeymasterKeyBlob* plaintext); 45 46 } // namespace keymaster 47 48 #endif // SYSTEM_KEYMASTER_OCB_UTILS_H_ 49