/* [<][>][^][v][top][bottom][index][help] */
DEFINITIONS
This source file includes following definitions.
- CAMELLIA_set_key
- CAMELLIA_encrypt
- CAMELLIA_decrypt
- CAMELLIA_cbc_encrypt
1 /*
2 * Copyright (c) 2007 Kungliga Tekniska Högskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 *
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * 3. Neither the name of the Institute nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34 #ifdef HAVE_CONFIG_H
35 #include "config.h"
36
37 RCSID("$Id: aes.c 20466 2007-04-20 08:29:05Z lha $");
38 #endif
39
40 #include <roken.h>
41
42 #ifdef KRB5
43 #include <krb5-types.h>
44 #endif
45
46 #include <string.h>
47
48 #include "camellia-ntt.h"
49 #include "camellia.h"
50
51 int
52 CAMELLIA_set_key(const unsigned char *userkey,
/* [<][>][^][v][top][bottom][index][help] */
53 const int bits, CAMELLIA_KEY *key)
54 {
55 key->bits = bits;
56 Camellia_Ekeygen(bits, userkey, key->key);
57 return 1;
58 }
59
60 void
61 CAMELLIA_encrypt(const unsigned char *in, unsigned char *out,
/* [<][>][^][v][top][bottom][index][help] */
62 const CAMELLIA_KEY *key)
63 {
64 Camellia_EncryptBlock(key->bits, in, key->key, out);
65
66 }
67
68 void
69 CAMELLIA_decrypt(const unsigned char *in, unsigned char *out,
/* [<][>][^][v][top][bottom][index][help] */
70 const CAMELLIA_KEY *key)
71 {
72 Camellia_DecryptBlock(key->bits, in, key->key, out);
73 }
74
75 void
76 CAMELLIA_cbc_encrypt(const unsigned char *in, unsigned char *out,
/* [<][>][^][v][top][bottom][index][help] */
77 unsigned long size, const CAMELLIA_KEY *key,
78 unsigned char *iv, int mode_encrypt)
79 {
80 unsigned char tmp[CAMELLIA_BLOCK_SIZE];
81 int i;
82
83 if (mode_encrypt) {
84 while (size >= CAMELLIA_BLOCK_SIZE) {
85 for (i = 0; i < CAMELLIA_BLOCK_SIZE; i++)
86 tmp[i] = in[i] ^ iv[i];
87 CAMELLIA_encrypt(tmp, out, key);
88 memcpy(iv, out, CAMELLIA_BLOCK_SIZE);
89 size -= CAMELLIA_BLOCK_SIZE;
90 in += CAMELLIA_BLOCK_SIZE;
91 out += CAMELLIA_BLOCK_SIZE;
92 }
93 if (size) {
94 for (i = 0; i < size; i++)
95 tmp[i] = in[i] ^ iv[i];
96 for (i = size; i < CAMELLIA_BLOCK_SIZE; i++)
97 tmp[i] = iv[i];
98 CAMELLIA_encrypt(tmp, out, key);
99 memcpy(iv, out, CAMELLIA_BLOCK_SIZE);
100 }
101 } else {
102 while (size >= CAMELLIA_BLOCK_SIZE) {
103 memcpy(tmp, in, CAMELLIA_BLOCK_SIZE);
104 CAMELLIA_decrypt(tmp, out, key);
105 for (i = 0; i < CAMELLIA_BLOCK_SIZE; i++)
106 out[i] ^= iv[i];
107 memcpy(iv, tmp, CAMELLIA_BLOCK_SIZE);
108 size -= CAMELLIA_BLOCK_SIZE;
109 in += CAMELLIA_BLOCK_SIZE;
110 out += CAMELLIA_BLOCK_SIZE;
111 }
112 if (size) {
113 memcpy(tmp, in, CAMELLIA_BLOCK_SIZE);
114 CAMELLIA_decrypt(tmp, out, key);
115 for (i = 0; i < size; i++)
116 out[i] ^= iv[i];
117 memcpy(iv, tmp, CAMELLIA_BLOCK_SIZE);
118 }
119 }
120 }