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/camellia/camellia.h>
54 #include <opencrypto/xform_enc.h>
55
56 static int cml_setkey(u_int8_t **, u_int8_t *, int);
57 static void cml_encrypt(caddr_t, u_int8_t *);
58 static void cml_decrypt(caddr_t, u_int8_t *);
59 static void cml_zerokey(u_int8_t **);
60
61 /* Encryption instances */
62 struct enc_xform enc_xform_camellia = {
63 CRYPTO_CAMELLIA_CBC, "Camellia",
64 CAMELLIA_BLOCK_LEN, CAMELLIA_BLOCK_LEN, CAMELLIA_MIN_KEY,
65 CAMELLIA_MAX_KEY,
66 cml_encrypt,
67 cml_decrypt,
68 cml_setkey,
69 cml_zerokey,
70 NULL,
71 };
72
73 /*
74 * Encryption wrapper routines.
75 */
76 static void
77 cml_encrypt(caddr_t key, u_int8_t *blk)
78 {
79 camellia_encrypt((camellia_ctx *) key, (u_char *) blk, (u_char *) blk);
80 }
81
82 static void
83 cml_decrypt(caddr_t key, u_int8_t *blk)
84 {
85 camellia_decrypt(((camellia_ctx *) key), (u_char *) blk,
86 (u_char *) blk);
87 }
88
89 static int
90 cml_setkey(u_int8_t **sched, u_int8_t *key, int len)
91 {
92 int err;
93
94 if (len != 16 && len != 24 && len != 32)
95 return (EINVAL);
96 *sched = KMALLOC(sizeof(camellia_ctx), M_CRYPTO_DATA,
97 M_NOWAIT|M_ZERO);
98 if (*sched != NULL) {
99 camellia_set_key((camellia_ctx *) *sched, (u_char *) key,
100 len * 8);
101 err = 0;
102 } else
103 err = ENOMEM;
104 return err;
105 }
106
107 static void
108 cml_zerokey(u_int8_t **sched)
109 {
110 bzero(*sched, sizeof(camellia_ctx));
111 KFREE(*sched, M_CRYPTO_DATA);
112 *sched = NULL;
113 }
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