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1/* $OpenBSD: aes.h,v 1.16 2025/01/25 17:59:44 tb Exp $ */
2/* ====================================================================
3 * Copyright (c) 1998-2002 The OpenSSL Project. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 *
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in
14 * the documentation and/or other materials provided with the
15 * distribution.
16 *
17 * 3. All advertising materials mentioning features or use of this
18 * software must display the following acknowledgment:
19 * "This product includes software developed by the OpenSSL Project
20 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
21 *
22 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
23 * endorse or promote products derived from this software without
24 * prior written permission. For written permission, please contact
25 * openssl-core@openssl.org.
26 *
27 * 5. Products derived from this software may not be called "OpenSSL"
28 * nor may "OpenSSL" appear in their names without prior written
29 * permission of the OpenSSL Project.
30 *
31 * 6. Redistributions of any form whatsoever must retain the following
32 * acknowledgment:
33 * "This product includes software developed by the OpenSSL Project
34 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
35 *
36 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
37 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
38 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
39 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
40 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
41 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
42 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
43 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
44 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
45 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
46 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
47 * OF THE POSSIBILITY OF SUCH DAMAGE.
48 * ====================================================================
49 *
50 */
51
52#ifndef HEADER_AES_H
53#define HEADER_AES_H
54
55#include <openssl/opensslconf.h>
56
57#include <stddef.h>
58
59#define AES_ENCRYPT 1
60#define AES_DECRYPT 0
61
62/* Because array size can't be a const in C, the following two are macros.
63 Both sizes are in bytes. */
64#define AES_MAXNR 14
65#define AES_BLOCK_SIZE 16
66
67#ifdef __cplusplus
68extern "C" {
69#endif
70
71/* This should be a hidden type, but EVP requires that the size be known */
72struct aes_key_st {
73 unsigned int rd_key[4 *(AES_MAXNR + 1)];
74 int rounds;
75};
76typedef struct aes_key_st AES_KEY;
77
78int AES_set_encrypt_key(const unsigned char *userKey, const int bits,
79 AES_KEY *key);
80int AES_set_decrypt_key(const unsigned char *userKey, const int bits,
81 AES_KEY *key);
82
83void AES_encrypt(const unsigned char *in, unsigned char *out,
84 const AES_KEY *key);
85void AES_decrypt(const unsigned char *in, unsigned char *out,
86 const AES_KEY *key);
87
88void AES_ecb_encrypt(const unsigned char *in, unsigned char *out,
89 const AES_KEY *key, const int enc);
90void AES_cbc_encrypt(const unsigned char *in, unsigned char *out,
91 size_t length, const AES_KEY *key, unsigned char *ivec, const int enc);
92void AES_cfb128_encrypt(const unsigned char *in, unsigned char *out,
93 size_t length, const AES_KEY *key, unsigned char *ivec, int *num,
94 const int enc);
95void AES_cfb1_encrypt(const unsigned char *in, unsigned char *out,
96 size_t length, const AES_KEY *key, unsigned char *ivec, int *num,
97 const int enc);
98void AES_cfb8_encrypt(const unsigned char *in, unsigned char *out,
99 size_t length, const AES_KEY *key, unsigned char *ivec, int *num,
100 const int enc);
101void AES_ofb128_encrypt(const unsigned char *in, unsigned char *out,
102 size_t length, const AES_KEY *key, unsigned char *ivec, int *num);
103void AES_ctr128_encrypt(const unsigned char *in, unsigned char *out,
104 size_t length, const AES_KEY *key, unsigned char ivec[AES_BLOCK_SIZE],
105 unsigned char ecount_buf[AES_BLOCK_SIZE], unsigned int *num);
106/* NB: the IV is _two_ blocks long */
107void AES_ige_encrypt(const unsigned char *in, unsigned char *out,
108 size_t length, const AES_KEY *key, unsigned char *ivec, const int enc);
109
110int AES_wrap_key(AES_KEY *key, const unsigned char *iv, unsigned char *out,
111 const unsigned char *in, unsigned int inlen);
112int AES_unwrap_key(AES_KEY *key, const unsigned char *iv, unsigned char *out,
113 const unsigned char *in, unsigned int inlen);
114
115
116#ifdef __cplusplus
117}
118#endif
119
120#endif /* !HEADER_AES_H */