xref: /netbsd-src/crypto/external/bsd/heimdal/dist/lib/hcrypto/camellia.c (revision d3273b5b76f5afaafe308cead5511dbb8df8c5e9)
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