xref: /freebsd/sys/crypto/des/des.h (revision 6990ffd8a95caaba6858ad44ff1b3157d1efba8f)
1 /*	$FreeBSD$	*/
2 /*	$KAME: des.h,v 1.7 2000/09/18 20:59:21 itojun Exp $	*/
3 
4 /* lib/des/des.h */
5 /* Copyright (C) 1995-1996 Eric Young (eay@mincom.oz.au)
6  * All rights reserved.
7  *
8  * This file is part of an SSL implementation written
9  * by Eric Young (eay@mincom.oz.au).
10  * The implementation was written so as to conform with Netscapes SSL
11  * specification.  This library and applications are
12  * FREE FOR COMMERCIAL AND NON-COMMERCIAL USE
13  * as long as the following conditions are aheared to.
14  *
15  * Copyright remains Eric Young's, and as such any Copyright notices in
16  * the code are not to be removed.  If this code is used in a product,
17  * Eric Young should be given attribution as the author of the parts used.
18  * This can be in the form of a textual message at program startup or
19  * in documentation (online or textual) provided with the package.
20  *
21  * Redistribution and use in source and binary forms, with or without
22  * modification, are permitted provided that the following conditions
23  * are met:
24  * 1. Redistributions of source code must retain the copyright
25  *    notice, this list of conditions and the following disclaimer.
26  * 2. Redistributions in binary form must reproduce the above copyright
27  *    notice, this list of conditions and the following disclaimer in the
28  *    documentation and/or other materials provided with the distribution.
29  * 3. All advertising materials mentioning features or use of this software
30  *    must display the following acknowledgement:
31  *    This product includes software developed by Eric Young (eay@mincom.oz.au)
32  *
33  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
34  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
35  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
36  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
37  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
38  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
39  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
40  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
41  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
42  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
43  * SUCH DAMAGE.
44  *
45  * The licence and distribution terms for any publically available version or
46  * derivative of this code cannot be changed.  i.e. this code cannot simply be
47  * copied and put under another distribution licence
48  * [including the GNU Public Licence.]
49  */
50 
51 #ifndef HEADER_DES_H
52 #define HEADER_DES_H
53 
54 #ifdef  __cplusplus
55 extern "C" {
56 #endif
57 
58 /* must be 32bit quantity */
59 #define DES_LONG u_int32_t
60 
61 typedef unsigned char des_cblock[8];
62 typedef struct des_ks_struct
63 	{
64 	union	{
65 		des_cblock _;
66 		/* make sure things are correct size on machines with
67 		 * 8 byte longs */
68 		DES_LONG pad[2];
69 		} ks;
70 #undef _
71 #define _	ks._
72 	} des_key_schedule[16];
73 
74 #define DES_KEY_SZ 	(sizeof(des_cblock))
75 #define DES_SCHEDULE_SZ (sizeof(des_key_schedule))
76 
77 #define DES_ENCRYPT	1
78 #define DES_DECRYPT	0
79 
80 #define DES_CBC_MODE	0
81 #define DES_PCBC_MODE	1
82 
83 extern int des_check_key;	/* defaults to false */
84 
85 char *des_options __P((void));
86 void des_ecb_encrypt __P((des_cblock *, des_cblock *,
87 	des_key_schedule, int));
88 void des_encrypt __P((DES_LONG *, des_key_schedule, int));
89 void des_encrypt2 __P((DES_LONG *, des_key_schedule, int));
90 
91 void des_set_odd_parity __P((des_cblock *));
92 int des_is_weak_key __P((des_cblock *));
93 int des_set_key __P((des_cblock *, des_key_schedule));
94 int des_key_sched __P((des_cblock *, des_key_schedule));
95 
96 #ifdef  __cplusplus
97 }
98 #endif
99 
100 #endif
101