1 /* $OpenBSD: xform.c,v 1.16 2001/08/28 12:20:43 ben Exp $ */
2 /*-
3 * The authors of this code are John Ioannidis (ji@tla.org),
4 * Angelos D. Keromytis (kermit@csd.uch.gr),
5 * Niels Provos (provos@physnet.uni-hamburg.de) and
6 * Damien Miller (djm@mindrot.org).
7 *
8 * This code was written by John Ioannidis for BSD/OS in Athens, Greece,
9 * in November 1995.
10 *
11 * Ported to OpenBSD and NetBSD, with additional transforms, in December 1996,
12 * by Angelos D. Keromytis.
13 *
14 * Additional transforms and features in 1997 and 1998 by Angelos D. Keromytis
15 * and Niels Provos.
16 *
17 * Additional features in 1999 by Angelos D. Keromytis.
18 *
19 * AES XTS implementation in 2008 by Damien Miller
20 *
21 * Copyright (C) 1995, 1996, 1997, 1998, 1999 by John Ioannidis,
22 * Angelos D. Keromytis and Niels Provos.
23 *
24 * Copyright (C) 2001, Angelos D. Keromytis.
25 *
26 * Copyright (C) 2008, Damien Miller
27 * Copyright (c) 2014 The FreeBSD Foundation
28 * All rights reserved.
29 *
30 * Portions of this software were developed by John-Mark Gurney
31 * under sponsorship of the FreeBSD Foundation and
32 * Rubicon Communications, LLC (Netgate).
33 *
34 * Permission to use, copy, and modify this software with or without fee
35 * is hereby granted, provided that this entire notice is included in
36 * all copies of any software which is or includes a copy or
37 * modification of this software.
38 * You may use this code under the GNU public license if you so wish. Please
39 * contribute changes back to the authors under this freer than GPL license
40 * so that we may further the use of strong encryption without limitations to
41 * all.
42 *
43 * THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR
44 * IMPLIED WARRANTY. IN PARTICULAR, NONE OF THE AUTHORS MAKES ANY
45 * REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE
46 * MERCHANTABILITY OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR
47 * PURPOSE.
48 */
49
50 #include <sys/cdefs.h>
51 __FBSDID("$FreeBSD$");
52
53 #include <crypto/des/des.h>
54 #include <opencrypto/xform_enc.h>
55
56 static int des1_setkey(u_int8_t **, u_int8_t *, int);
57 static void des1_encrypt(caddr_t, u_int8_t *);
58 static void des1_decrypt(caddr_t, u_int8_t *);
59 static void des1_zerokey(u_int8_t **);
60
61 /* Encryption instances */
62 struct enc_xform enc_xform_des = {
63 CRYPTO_DES_CBC, "DES",
64 DES_BLOCK_LEN, DES_BLOCK_LEN, DES_MIN_KEY, DES_MAX_KEY,
65 des1_encrypt,
66 des1_decrypt,
67 des1_setkey,
68 des1_zerokey,
69 NULL,
70 };
71
72 /*
73 * Encryption wrapper routines.
74 */
75 static void
des1_encrypt(caddr_t key,u_int8_t * blk)76 des1_encrypt(caddr_t key, u_int8_t *blk)
77 {
78 des_cblock *cb = (des_cblock *) blk;
79 des_key_schedule *p = (des_key_schedule *) key;
80
81 des_ecb_encrypt(cb, cb, p[0], DES_ENCRYPT);
82 }
83
84 static void
des1_decrypt(caddr_t key,u_int8_t * blk)85 des1_decrypt(caddr_t key, u_int8_t *blk)
86 {
87 des_cblock *cb = (des_cblock *) blk;
88 des_key_schedule *p = (des_key_schedule *) key;
89
90 des_ecb_encrypt(cb, cb, p[0], DES_DECRYPT);
91 }
92
93 static int
des1_setkey(u_int8_t ** sched,u_int8_t * key,int len)94 des1_setkey(u_int8_t **sched, u_int8_t *key, int len)
95 {
96 des_key_schedule *p;
97 int err;
98
99 p = KMALLOC(sizeof (des_key_schedule),
100 M_CRYPTO_DATA, M_NOWAIT|M_ZERO);
101 if (p != NULL) {
102 des_set_key((des_cblock *) key, p[0]);
103 err = 0;
104 } else
105 err = ENOMEM;
106 *sched = (u_int8_t *) p;
107 return err;
108 }
109
110 static void
des1_zerokey(u_int8_t ** sched)111 des1_zerokey(u_int8_t **sched)
112 {
113 bzero(*sched, sizeof (des_key_schedule));
114 KFREE(*sched, M_CRYPTO_DATA);
115 *sched = NULL;
116 }
117