1/*	$NetBSD: camellia.c,v 1.2 2017/01/28 21:31:47 christos Exp $	*/
2
3/*
4 * Copyright (c) 2007 Kungliga Tekniska H��gskolan
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
46int
47CAMELLIA_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
55void
56CAMELLIA_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
63void
64CAMELLIA_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
70void
71CAMELLIA_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