1 /* $OpenBSD: rijndael.h,v 1.12 2007/05/27 05:43:17 tedu Exp $ */
2
3 /**
4 * rijndael-alg-fst.h
5 *
6 * @version 3.0 (December 2000)
7 *
8 * Optimised ANSI C code for the Rijndael cipher (now AES)
9 *
10 * @author Vincent Rijmen <vincent.rijmen@esat.kuleuven.ac.be>
11 * @author Antoon Bosselaers <antoon.bosselaers@esat.kuleuven.ac.be>
12 * @author Paulo Barreto <paulo.barreto@terra.com.br>
13 *
14 * This code is hereby placed in the public domain.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ''AS IS'' AND ANY EXPRESS
17 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
18 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE
20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
23 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
25 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
26 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28 #ifndef __RIJNDAEL_H
29 #define __RIJNDAEL_H
30
31 #define AES_MAXKEYBITS (256)
32 #define AES_MAXKEYBYTES (AES_MAXKEYBITS/8)
33 /* for 256-bit keys, fewer for less */
34 #define AES_MAXROUNDS 14
35
36 typedef unsigned char u8;
37 typedef unsigned short u16;
38 typedef unsigned int u32;
39
40 /* The structure for key information */
41 typedef struct {
42 int enc_only; /* context contains only encrypt schedule */
43 int Nr; /* key-length-dependent number of rounds */
44 u32 ek[4*(AES_MAXROUNDS + 1)]; /* encrypt key schedule */
45 u32 dk[4*(AES_MAXROUNDS + 1)]; /* decrypt key schedule */
46 } rijndael_ctx;
47
48 int rijndael_set_key(rijndael_ctx *, u_char *, int);
49 int rijndael_set_key_enc_only(rijndael_ctx *, u_char *, int);
50 void rijndael_decrypt(rijndael_ctx *, u_char *, u_char *);
51 void rijndael_encrypt(rijndael_ctx *, u_char *, u_char *);
52
53 int rijndaelKeySetupEnc(unsigned int [], const unsigned char [], int);
54 int rijndaelKeySetupDec(unsigned int [], const unsigned char [], int);
55 void rijndaelEncrypt(const unsigned int [], int, const unsigned char [],
56 unsigned char []);
57
58 #endif /* __RIJNDAEL_H */