1 /* $NetBSD: camellia.c,v 1.1.1.1 2011/04/13 18:14:49 elric Exp $ */
2
3 /*
4 * Copyright (c) 2007 Kungliga Tekniska Högskolan
5 * (Royal Institute of Technology, Stockholm, Sweden).
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 *
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * 3. Neither the name of the Institute nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 */
35
36 #include "config.h"
37
38 #ifdef KRB5
39 #include <krb5/krb5-types.h>
40 #endif
41
42 #include <string.h>
43
44 #include "camellia-ntt.h"
45 #include "camellia.h"
46
47 #include <krb5/roken.h>
48
49 int
CAMELLIA_set_key(const unsigned char * userkey,const int bits,CAMELLIA_KEY * key)50 CAMELLIA_set_key(const unsigned char *userkey,
51 const int bits, CAMELLIA_KEY *key)
52 {
53 key->bits = bits;
54 Camellia_Ekeygen(bits, userkey, key->key);
55 return 1;
56 }
57
58 void
CAMELLIA_encrypt(const unsigned char * in,unsigned char * out,const CAMELLIA_KEY * key)59 CAMELLIA_encrypt(const unsigned char *in, unsigned char *out,
60 const CAMELLIA_KEY *key)
61 {
62 Camellia_EncryptBlock(key->bits, in, key->key, out);
63
64 }
65
66 void
CAMELLIA_decrypt(const unsigned char * in,unsigned char * out,const CAMELLIA_KEY * key)67 CAMELLIA_decrypt(const unsigned char *in, unsigned char *out,
68 const CAMELLIA_KEY *key)
69 {
70 Camellia_DecryptBlock(key->bits, in, key->key, out);
71 }
72
73 void
CAMELLIA_cbc_encrypt(const unsigned char * in,unsigned char * out,unsigned long size,const CAMELLIA_KEY * key,unsigned char * iv,int mode_encrypt)74 CAMELLIA_cbc_encrypt(const unsigned char *in, unsigned char *out,
75 unsigned long size, const CAMELLIA_KEY *key,
76 unsigned char *iv, int mode_encrypt)
77 {
78 unsigned char tmp[CAMELLIA_BLOCK_SIZE];
79 int i;
80
81 if (mode_encrypt) {
82 while (size >= CAMELLIA_BLOCK_SIZE) {
83 for (i = 0; i < CAMELLIA_BLOCK_SIZE; i++)
84 tmp[i] = in[i] ^ iv[i];
85 CAMELLIA_encrypt(tmp, out, key);
86 memcpy(iv, out, CAMELLIA_BLOCK_SIZE);
87 size -= CAMELLIA_BLOCK_SIZE;
88 in += CAMELLIA_BLOCK_SIZE;
89 out += CAMELLIA_BLOCK_SIZE;
90 }
91 if (size) {
92 for (i = 0; i < size; i++)
93 tmp[i] = in[i] ^ iv[i];
94 for (i = size; i < CAMELLIA_BLOCK_SIZE; i++)
95 tmp[i] = iv[i];
96 CAMELLIA_encrypt(tmp, out, key);
97 memcpy(iv, out, CAMELLIA_BLOCK_SIZE);
98 }
99 } else {
100 while (size >= CAMELLIA_BLOCK_SIZE) {
101 memcpy(tmp, in, CAMELLIA_BLOCK_SIZE);
102 CAMELLIA_decrypt(tmp, out, key);
103 for (i = 0; i < CAMELLIA_BLOCK_SIZE; i++)
104 out[i] ^= iv[i];
105 memcpy(iv, tmp, CAMELLIA_BLOCK_SIZE);
106 size -= CAMELLIA_BLOCK_SIZE;
107 in += CAMELLIA_BLOCK_SIZE;
108 out += CAMELLIA_BLOCK_SIZE;
109 }
110 if (size) {
111 memcpy(tmp, in, CAMELLIA_BLOCK_SIZE);
112 CAMELLIA_decrypt(tmp, out, key);
113 for (i = 0; i < size; i++)
114 out[i] ^= iv[i];
115 memcpy(iv, tmp, CAMELLIA_BLOCK_SIZE);
116 }
117 }
118 }
119