1 /* $OpenBSD: aes.h,v 1.14 2014/07/09 09:10:07 miod 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 #ifdef OPENSSL_NO_AES
58 #error AES is disabled.
59 #endif
60 
61 #include <stddef.h>
62 
63 #define AES_ENCRYPT	1
64 #define AES_DECRYPT	0
65 
66 /* Because array size can't be a const in C, the following two are macros.
67    Both sizes are in bytes. */
68 #define AES_MAXNR 14
69 #define AES_BLOCK_SIZE 16
70 
71 #ifdef  __cplusplus
72 extern "C" {
73 #endif
74 
75 /* This should be a hidden type, but EVP requires that the size be known */
76 struct aes_key_st {
77 	unsigned int rd_key[4 *(AES_MAXNR + 1)];
78 	int rounds;
79 };
80 typedef struct aes_key_st AES_KEY;
81 
82 const char *AES_options(void);
83 
84 int AES_set_encrypt_key(const unsigned char *userKey, const int bits,
85     AES_KEY *key);
86 int AES_set_decrypt_key(const unsigned char *userKey, const int bits,
87     AES_KEY *key);
88 
89 void AES_encrypt(const unsigned char *in, unsigned char *out,
90     const AES_KEY *key);
91 void AES_decrypt(const unsigned char *in, unsigned char *out,
92     const AES_KEY *key);
93 
94 void AES_ecb_encrypt(const unsigned char *in, unsigned char *out,
95     const AES_KEY *key, const int enc);
96 void AES_cbc_encrypt(const unsigned char *in, unsigned char *out,
97     size_t length, const AES_KEY *key, unsigned char *ivec, const int enc);
98 void AES_cfb128_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);
101 void AES_cfb1_encrypt(const unsigned char *in, unsigned char *out,
102     size_t length, const AES_KEY *key, unsigned char *ivec, int *num,
103     const int enc);
104 void AES_cfb8_encrypt(const unsigned char *in, unsigned char *out,
105     size_t length, const AES_KEY *key, unsigned char *ivec, int *num,
106     const int enc);
107 void AES_ofb128_encrypt(const unsigned char *in, unsigned char *out,
108     size_t length, const AES_KEY *key, unsigned char *ivec, int *num);
109 void AES_ctr128_encrypt(const unsigned char *in, unsigned char *out,
110     size_t length, const AES_KEY *key, unsigned char ivec[AES_BLOCK_SIZE],
111     unsigned char ecount_buf[AES_BLOCK_SIZE], unsigned int *num);
112 /* NB: the IV is _two_ blocks long */
113 void AES_ige_encrypt(const unsigned char *in, unsigned char *out,
114     size_t length, const AES_KEY *key, unsigned char *ivec, const int enc);
115 
116 int AES_wrap_key(AES_KEY *key, const unsigned char *iv, unsigned char *out,
117     const unsigned char *in, unsigned int inlen);
118 int AES_unwrap_key(AES_KEY *key, const unsigned char *iv, unsigned char *out,
119     const unsigned char *in, unsigned int inlen);
120 
121 
122 #ifdef  __cplusplus
123 }
124 #endif
125 
126 #endif /* !HEADER_AES_H */
127