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
26namespace keymaster {
27
28class AuthorizationSet;
29struct KeymasterKeyBlob;
30
31static const int OCB_NONCE_LENGTH = 12;
32static const int OCB_TAG_LENGTH = 16;
33
34keymaster_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
40keymaster_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