1 /* $NetBSD: camellia.c,v 1.2 2017/01/28 21:31:47 christos 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 #include <krb5/roken.h>
38
39 #ifdef KRB5
40 #include <krb5/krb5-types.h>
41 #endif
42
43 #include "camellia-ntt.h"
44 #include "camellia.h"
45
46 int
CAMELLIA_set_key(const unsigned char * userkey,const int bits,CAMELLIA_KEY * key)47 CAMELLIA_set_key(const unsigned char *userkey,
48 const int bits, CAMELLIA_KEY *key)
49 {
50 key->bits = bits;
51 Camellia_Ekeygen(bits, userkey, key->key);
52 return 1;
53 }
54
55 void
CAMELLIA_encrypt(const unsigned char * in,unsigned char * out,const CAMELLIA_KEY * key)56 CAMELLIA_encrypt(const unsigned char *in, unsigned char *out,
57 const CAMELLIA_KEY *key)
58 {
59 Camellia_EncryptBlock(key->bits, in, key->key, out);
60
61 }
62
63 void
CAMELLIA_decrypt(const unsigned char * in,unsigned char * out,const CAMELLIA_KEY * key)64 CAMELLIA_decrypt(const unsigned char *in, unsigned char *out,
65 const CAMELLIA_KEY *key)
66 {
67 Camellia_DecryptBlock(key->bits, in, key->key, out);
68 }
69
70 void
CAMELLIA_cbc_encrypt(const unsigned char * in,unsigned char * out,unsigned long size,const CAMELLIA_KEY * key,unsigned char * iv,int mode_encrypt)71 CAMELLIA_cbc_encrypt(const unsigned char *in, unsigned char *out,
72 unsigned long size, const CAMELLIA_KEY *key,
73 unsigned char *iv, int mode_encrypt)
74 {
75 unsigned char tmp[CAMELLIA_BLOCK_SIZE];
76 int i;
77
78 if (mode_encrypt) {
79 while (size >= CAMELLIA_BLOCK_SIZE) {
80 for (i = 0; i < CAMELLIA_BLOCK_SIZE; i++)
81 tmp[i] = in[i] ^ iv[i];
82 CAMELLIA_encrypt(tmp, out, key);
83 memcpy(iv, out, CAMELLIA_BLOCK_SIZE);
84 size -= CAMELLIA_BLOCK_SIZE;
85 in += CAMELLIA_BLOCK_SIZE;
86 out += CAMELLIA_BLOCK_SIZE;
87 }
88 if (size) {
89 for (i = 0; i < size; i++)
90 tmp[i] = in[i] ^ iv[i];
91 for (i = size; i < CAMELLIA_BLOCK_SIZE; i++)
92 tmp[i] = iv[i];
93 CAMELLIA_encrypt(tmp, out, key);
94 memcpy(iv, out, CAMELLIA_BLOCK_SIZE);
95 }
96 } else {
97 while (size >= CAMELLIA_BLOCK_SIZE) {
98 memcpy(tmp, in, CAMELLIA_BLOCK_SIZE);
99 CAMELLIA_decrypt(tmp, out, key);
100 for (i = 0; i < CAMELLIA_BLOCK_SIZE; i++)
101 out[i] ^= iv[i];
102 memcpy(iv, tmp, CAMELLIA_BLOCK_SIZE);
103 size -= CAMELLIA_BLOCK_SIZE;
104 in += CAMELLIA_BLOCK_SIZE;
105 out += CAMELLIA_BLOCK_SIZE;
106 }
107 if (size) {
108 memcpy(tmp, in, CAMELLIA_BLOCK_SIZE);
109 CAMELLIA_decrypt(tmp, out, key);
110 for (i = 0; i < size; i++)
111 out[i] ^= iv[i];
112 memcpy(iv, tmp, CAMELLIA_BLOCK_SIZE);
113 }
114 }
115 }
116