1 /* $OpenBSD: xform.c,v 1.16 2001/08/28 12:20:43 ben Exp $ */
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).
8 * This code was written by John Ioannidis for BSD/OS in Athens, Greece,
11 * Ported to OpenBSD and NetBSD, with additional transforms, in December 1996,
12 * by Angelos D. Keromytis.
14 * Additional transforms and features in 1997 and 1998 by Angelos D. Keromytis
17 * Additional features in 1999 by Angelos D. Keromytis.
19 * AES XTS implementation in 2008 by Damien Miller
21 * Copyright (C) 1995, 1996, 1997, 1998, 1999 by John Ioannidis,
22 * Angelos D. Keromytis and Niels Provos.
24 * Copyright (C) 2001, Angelos D. Keromytis.
26 * Copyright (C) 2008, Damien Miller
27 * Copyright (c) 2014 The FreeBSD Foundation
28 * All rights reserved.
30 * Portions of this software were developed by John-Mark Gurney
31 * under sponsorship of the FreeBSD Foundation and
32 * Rubicon Communications, LLC (Netgate).
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
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
50 #include <sys/cdefs.h>
51 __FBSDID("$FreeBSD$");
53 #include <opencrypto/skipjack.h>
54 #include <opencrypto/xform_enc.h>
56 static int skipjack_setkey(u_int8_t **, u_int8_t *, int);
57 static void skipjack_encrypt(caddr_t, u_int8_t *);
58 static void skipjack_decrypt(caddr_t, u_int8_t *);
59 static void skipjack_zerokey(u_int8_t **);
61 /* Encryption instances */
62 struct enc_xform enc_xform_skipjack = {
63 CRYPTO_SKIPJACK_CBC, "Skipjack",
64 SKIPJACK_BLOCK_LEN, SKIPJACK_BLOCK_LEN, SKIPJACK_MIN_KEY,
67 skipjack_decrypt, skipjack_setkey,
73 * Encryption wrapper routines.
76 skipjack_encrypt(caddr_t key, u_int8_t *blk)
78 skipjack_forwards(blk, blk, (u_int8_t **) key);
82 skipjack_decrypt(caddr_t key, u_int8_t *blk)
84 skipjack_backwards(blk, blk, (u_int8_t **) key);
88 skipjack_setkey(u_int8_t **sched, u_int8_t *key, int len)
92 /* NB: allocate all the memory that's needed at once */
93 *sched = KMALLOC(10 * (sizeof(u_int8_t *) + 0x100),
94 M_CRYPTO_DATA, M_NOWAIT|M_ZERO);
96 u_int8_t** key_tables = (u_int8_t**) *sched;
97 u_int8_t* table = (u_int8_t*) &key_tables[10];
100 for (k = 0; k < 10; k++) {
101 key_tables[k] = table;
104 subkey_table_gen(key, (u_int8_t **) *sched);
112 skipjack_zerokey(u_int8_t **sched)
114 bzero(*sched, 10 * (sizeof(u_int8_t *) + 0x100));
115 KFREE(*sched, M_CRYPTO_DATA);