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/*
* Copyright 2014 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 SYSTEM_KEYMASTER_OCB_UTILS_H_
#define SYSTEM_KEYMASTER_OCB_UTILS_H_
#include "ae.h"
#include <hardware/keymaster_defs.h>
#include <keymaster/serializable.h>
namespace keymaster {
class AuthorizationSet;
struct KeymasterKeyBlob;
static const int OCB_NONCE_LENGTH = 12;
static const int OCB_TAG_LENGTH = 16;
keymaster_error_t OcbEncryptKey(const AuthorizationSet& hw_enforced,
const AuthorizationSet& sw_enforced, const AuthorizationSet& hidden,
const KeymasterKeyBlob& master_key,
const KeymasterKeyBlob& plaintext, const Buffer& nonce,
KeymasterKeyBlob* ciphertext, Buffer* tag);
keymaster_error_t OcbDecryptKey(const AuthorizationSet& hw_enforced,
const AuthorizationSet& sw_enforced, const AuthorizationSet& hidden,
const KeymasterKeyBlob& master_key,
const KeymasterKeyBlob& ciphertext, const Buffer& nonce,
const Buffer& tag, KeymasterKeyBlob* plaintext);
} // namespace keymaster
#endif // SYSTEM_KEYMASTER_OCB_UTILS_H_
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