xref: /openssh-portable/rijndael.h (revision ec0b67eb)
1 /*	$OpenBSD: rijndael.h,v 1.14 2014/04/29 15:42:07 markus 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 _PRIVATE_RIJNDAEL_H
29 #define _PRIVATE_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 int	rijndaelKeySetupEnc(unsigned int [], const unsigned char [], int);
41 void	rijndaelEncrypt(const unsigned int [], int, const unsigned char [],
42 	    unsigned char []);
43 
44 /*  The structure for key information */
45 typedef struct {
46 	int	decrypt;
47 	int	Nr;		/* key-length-dependent number of rounds */
48 	u32	ek[4*(AES_MAXROUNDS + 1)];	/* encrypt key schedule */
49 	u32	dk[4*(AES_MAXROUNDS + 1)];	/* decrypt key schedule */
50 } rijndael_ctx;
51 
52 void	 rijndael_set_key(rijndael_ctx *, u_char *, int, int);
53 void	 rijndael_decrypt(rijndael_ctx *, u_char *, u_char *);
54 void	 rijndael_encrypt(rijndael_ctx *, u_char *, u_char *);
55 
56 #endif /* _PRIVATE_RIJNDAEL_H */
57