The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

FreeBSD/Linux Kernel Cross Reference
sys/opencrypto/xform_blf.c

Version: -  FREEBSD  -  FREEBSD-13-STABLE  -  FREEBSD-13-0  -  FREEBSD-12-STABLE  -  FREEBSD-12-0  -  FREEBSD-11-STABLE  -  FREEBSD-11-0  -  FREEBSD-10-STABLE  -  FREEBSD-10-0  -  FREEBSD-9-STABLE  -  FREEBSD-9-0  -  FREEBSD-8-STABLE  -  FREEBSD-8-0  -  FREEBSD-7-STABLE  -  FREEBSD-7-0  -  FREEBSD-6-STABLE  -  FREEBSD-6-0  -  FREEBSD-5-STABLE  -  FREEBSD-5-0  -  FREEBSD-4-STABLE  -  FREEBSD-3-STABLE  -  FREEBSD22  -  l41  -  OPENBSD  -  linux-2.6  -  MK84  -  PLAN9  -  xnu-8792 
SearchContext: -  none  -  3  -  10 

    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: releng/11.2/sys/opencrypto/xform_blf.c 292963 2015-12-30 22:43:07Z allanjude $");
   52 
   53 #include <crypto/blowfish/blowfish.h>
   54 #include <opencrypto/xform_enc.h>
   55 
   56 static  int blf_setkey(u_int8_t **, u_int8_t *, int);
   57 static  void blf_encrypt(caddr_t, u_int8_t *);
   58 static  void blf_decrypt(caddr_t, u_int8_t *);
   59 static  void blf_zerokey(u_int8_t **);
   60 
   61 /* Encryption instances */
   62 struct enc_xform enc_xform_blf = {
   63         CRYPTO_BLF_CBC, "Blowfish",
   64         BLOWFISH_BLOCK_LEN, BLOWFISH_BLOCK_LEN, BLOWFISH_MIN_KEY,
   65         BLOWFISH_MAX_KEY,
   66         blf_encrypt,
   67         blf_decrypt,
   68         blf_setkey,
   69         blf_zerokey,
   70         NULL,
   71 };
   72 
   73 /*
   74  * Encryption wrapper routines.
   75  */
   76 static void
   77 blf_encrypt(caddr_t key, u_int8_t *blk)
   78 {
   79         BF_LONG t[2];
   80 
   81         memcpy(t, blk, sizeof (t));
   82         t[0] = ntohl(t[0]);
   83         t[1] = ntohl(t[1]);
   84         /* NB: BF_encrypt expects the block in host order! */
   85         BF_encrypt(t, (BF_KEY *) key);
   86         t[0] = htonl(t[0]);
   87         t[1] = htonl(t[1]);
   88         memcpy(blk, t, sizeof (t));
   89 }
   90 
   91 static void
   92 blf_decrypt(caddr_t key, u_int8_t *blk)
   93 {
   94         BF_LONG t[2];
   95 
   96         memcpy(t, blk, sizeof (t));
   97         t[0] = ntohl(t[0]);
   98         t[1] = ntohl(t[1]);
   99         /* NB: BF_decrypt expects the block in host order! */
  100         BF_decrypt(t, (BF_KEY *) key);
  101         t[0] = htonl(t[0]);
  102         t[1] = htonl(t[1]);
  103         memcpy(blk, t, sizeof (t));
  104 }
  105 
  106 static int
  107 blf_setkey(u_int8_t **sched, u_int8_t *key, int len)
  108 {
  109         int err;
  110 
  111         *sched = KMALLOC(sizeof(BF_KEY),
  112                 M_CRYPTO_DATA, M_NOWAIT|M_ZERO);
  113         if (*sched != NULL) {
  114                 BF_set_key((BF_KEY *) *sched, len, key);
  115                 err = 0;
  116         } else
  117                 err = ENOMEM;
  118         return err;
  119 }
  120 
  121 static void
  122 blf_zerokey(u_int8_t **sched)
  123 {
  124         bzero(*sched, sizeof(BF_KEY));
  125         KFREE(*sched, M_CRYPTO_DATA);
  126         *sched = NULL;
  127 }

Cache object: d91d4c71dc5091a9916b7d431b152ed8


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]


This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.