diff options
Diffstat (limited to 'freebsd/sys/opencrypto/xform_des3.c')
| -rw-r--r-- | freebsd/sys/opencrypto/xform_des3.c | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/freebsd/sys/opencrypto/xform_des3.c b/freebsd/sys/opencrypto/xform_des3.c new file mode 100644 index 00000000..e47de600 --- /dev/null +++ b/freebsd/sys/opencrypto/xform_des3.c @@ -0,0 +1,121 @@ +#include <machine/rtems-bsd-kernel-space.h> + +/* $OpenBSD: xform.c,v 1.16 2001/08/28 12:20:43 ben Exp $ */ +/*- + * The authors of this code are John Ioannidis (ji@tla.org), + * Angelos D. Keromytis (kermit@csd.uch.gr), + * Niels Provos (provos@physnet.uni-hamburg.de) and + * Damien Miller (djm@mindrot.org). + * + * This code was written by John Ioannidis for BSD/OS in Athens, Greece, + * in November 1995. + * + * Ported to OpenBSD and NetBSD, with additional transforms, in December 1996, + * by Angelos D. Keromytis. + * + * Additional transforms and features in 1997 and 1998 by Angelos D. Keromytis + * and Niels Provos. + * + * Additional features in 1999 by Angelos D. Keromytis. + * + * AES XTS implementation in 2008 by Damien Miller + * + * Copyright (C) 1995, 1996, 1997, 1998, 1999 by John Ioannidis, + * Angelos D. Keromytis and Niels Provos. + * + * Copyright (C) 2001, Angelos D. Keromytis. + * + * Copyright (C) 2008, Damien Miller + * Copyright (c) 2014 The FreeBSD Foundation + * All rights reserved. + * + * Portions of this software were developed by John-Mark Gurney + * under sponsorship of the FreeBSD Foundation and + * Rubicon Communications, LLC (Netgate). + * + * Permission to use, copy, and modify this software with or without fee + * is hereby granted, provided that this entire notice is included in + * all copies of any software which is or includes a copy or + * modification of this software. + * You may use this code under the GNU public license if you so wish. Please + * contribute changes back to the authors under this freer than GPL license + * so that we may further the use of strong encryption without limitations to + * all. + * + * THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR + * IMPLIED WARRANTY. IN PARTICULAR, NONE OF THE AUTHORS MAKES ANY + * REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE + * MERCHANTABILITY OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR + * PURPOSE. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <crypto/des/des.h> +#include <opencrypto/xform_enc.h> + +static int des3_setkey(u_int8_t **, u_int8_t *, int); +static void des3_encrypt(caddr_t, u_int8_t *); +static void des3_decrypt(caddr_t, u_int8_t *); +static void des3_zerokey(u_int8_t **); + +/* Encryption instances */ +struct enc_xform enc_xform_3des = { + CRYPTO_3DES_CBC, "3DES", + DES3_BLOCK_LEN, DES3_BLOCK_LEN, TRIPLE_DES_MIN_KEY, + TRIPLE_DES_MAX_KEY, + des3_encrypt, + des3_decrypt, + des3_setkey, + des3_zerokey, + NULL, +}; + +/* + * Encryption wrapper routines. + */ +static void +des3_encrypt(caddr_t key, u_int8_t *blk) +{ + des_cblock *cb = (des_cblock *) blk; + des_key_schedule *p = (des_key_schedule *) key; + + des_ecb3_encrypt(cb, cb, p[0], p[1], p[2], DES_ENCRYPT); +} + +static void +des3_decrypt(caddr_t key, u_int8_t *blk) +{ + des_cblock *cb = (des_cblock *) blk; + des_key_schedule *p = (des_key_schedule *) key; + + des_ecb3_encrypt(cb, cb, p[0], p[1], p[2], DES_DECRYPT); +} + +static int +des3_setkey(u_int8_t **sched, u_int8_t *key, int len) +{ + des_key_schedule *p; + int err; + + p = KMALLOC(3*sizeof (des_key_schedule), + M_CRYPTO_DATA, M_NOWAIT|M_ZERO); + if (p != NULL) { + des_set_key((des_cblock *)(key + 0), p[0]); + des_set_key((des_cblock *)(key + 8), p[1]); + des_set_key((des_cblock *)(key + 16), p[2]); + err = 0; + } else + err = ENOMEM; + *sched = (u_int8_t *) p; + return err; +} + +static void +des3_zerokey(u_int8_t **sched) +{ + bzero(*sched, 3*sizeof (des_key_schedule)); + KFREE(*sched, M_CRYPTO_DATA); + *sched = NULL; +} |