2 * Copyright (c) 2007 Kungliga Tekniska Högskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
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.
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.
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
37 RCSID("$Id: aes.c 20466 2007-04-20 08:29:05Z lha $");
41 #include <krb5-types.h>
46 #include "camellia-ntt.h"
50 CAMELLIA_set_key(const unsigned char *userkey
,
51 const int bits
, CAMELLIA_KEY
*key
)
54 Camellia_Ekeygen(bits
, userkey
, key
->key
);
59 CAMELLIA_encrypt(const unsigned char *in
, unsigned char *out
,
60 const CAMELLIA_KEY
*key
)
62 Camellia_EncryptBlock(key
->bits
, in
, key
->key
, out
);
67 CAMELLIA_decrypt(const unsigned char *in
, unsigned char *out
,
68 const CAMELLIA_KEY
*key
)
70 Camellia_DecryptBlock(key
->bits
, in
, key
->key
, out
);
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
)
78 unsigned char tmp
[CAMELLIA_BLOCK_SIZE
];
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
;
92 for (i
= 0; i
< size
; i
++)
93 tmp
[i
] = in
[i
] ^ iv
[i
];
94 for (i
= size
; i
< CAMELLIA_BLOCK_SIZE
; i
++)
96 CAMELLIA_encrypt(tmp
, out
, key
);
97 memcpy(iv
, out
, CAMELLIA_BLOCK_SIZE
);
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
++)
105 memcpy(iv
, tmp
, CAMELLIA_BLOCK_SIZE
);
106 size
-= CAMELLIA_BLOCK_SIZE
;
107 in
+= CAMELLIA_BLOCK_SIZE
;
108 out
+= CAMELLIA_BLOCK_SIZE
;
111 memcpy(tmp
, in
, CAMELLIA_BLOCK_SIZE
);
112 CAMELLIA_decrypt(tmp
, out
, key
);
113 for (i
= 0; i
< size
; i
++)
115 memcpy(iv
, tmp
, CAMELLIA_BLOCK_SIZE
);