freebsd-dev/sys/crypto/blowfish/bf_enc.c
Yoshinobu Inoue 6a800098cc IPSEC support in the kernel.
pr_input() routines prototype is also changed to support IPSEC and IPV6
chained protocol headers.

Reviewed by: freebsd-arch, cvs-committers
Obtained from: KAME project
1999-12-22 19:13:38 +00:00

143 lines
4.8 KiB
C

/* crypto/bf/bf_enc.c */
/* Copyright (C) 1995-1997 Eric Young (eay@mincom.oz.au)
* All rights reserved.
*
* This package is an SSL implementation written
* by Eric Young (eay@mincom.oz.au).
* The implementation was written so as to conform with Netscapes SSL.
*
* This library is free for commercial and non-commercial use as long as
* the following conditions are aheared to. The following conditions
* apply to all code found in this distribution, be it the RC4, RSA,
* lhash, DES, etc., code; not just the SSL code. The SSL documentation
* included with this distribution is covered by the same copyright terms
* except that the holder is Tim Hudson (tjh@mincom.oz.au).
*
* Copyright remains Eric Young's, and as such any Copyright notices in
* the code are not to be removed.
* If this package is used in a product, Eric Young should be given attribution
* as the author of the parts of the library used.
* This can be in the form of a textual message at program startup or
* in documentation (online or textual) provided with the package.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* "This product includes cryptographic software written by
* Eric Young (eay@mincom.oz.au)"
* The word 'cryptographic' can be left out if the rouines from the library
* being used are not cryptographic related :-).
* 4. If you include any Windows specific code (or a derivative thereof) from
* the apps directory (application code) you must include an acknowledgement:
* "This product includes software written by Tim Hudson (tjh@mincom.oz.au)"
*
* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* The licence and distribution terms for any publically available version or
* derivative of this code cannot be changed. i.e. this code cannot simply be
* copied and put under another distribution licence
* [including the GNU Public Licence.]
*
* $FreeBSD$
*/
#include <crypto/blowfish/blowfish.h>
#include <crypto/blowfish/bf_locl.h>
/* Blowfish as implemented from 'Blowfish: Springer-Verlag paper'
* (From LECTURE NOTES IN COIMPUTER SCIENCE 809, FAST SOFTWARE ENCRYPTION,
* CAMBRIDGE SECURITY WORKSHOP, CAMBRIDGE, U.K., DECEMBER 9-11, 1993)
*/
#if (BF_ROUNDS != 16) && (BF_ROUNDS != 20)
If you set BF_ROUNDS to some value other than 16 or 20, you will have
to modify the code.
#endif
void BF_encrypt(data,key,encrypt)
BF_LONG *data;
BF_KEY *key;
int encrypt;
{
register BF_LONG l,r,*p,*s;
p=key->P;
s= &(key->S[0]);
l=data[0];
r=data[1];
if (encrypt)
{
l^=p[0];
BF_ENC(r,l,s,p[ 1]);
BF_ENC(l,r,s,p[ 2]);
BF_ENC(r,l,s,p[ 3]);
BF_ENC(l,r,s,p[ 4]);
BF_ENC(r,l,s,p[ 5]);
BF_ENC(l,r,s,p[ 6]);
BF_ENC(r,l,s,p[ 7]);
BF_ENC(l,r,s,p[ 8]);
BF_ENC(r,l,s,p[ 9]);
BF_ENC(l,r,s,p[10]);
BF_ENC(r,l,s,p[11]);
BF_ENC(l,r,s,p[12]);
BF_ENC(r,l,s,p[13]);
BF_ENC(l,r,s,p[14]);
BF_ENC(r,l,s,p[15]);
BF_ENC(l,r,s,p[16]);
#if BF_ROUNDS == 20
BF_ENC(r,l,s,p[17]);
BF_ENC(l,r,s,p[18]);
BF_ENC(r,l,s,p[19]);
BF_ENC(l,r,s,p[20]);
#endif
r^=p[BF_ROUNDS+1];
}
else
{
l^=p[BF_ROUNDS+1];
#if BF_ROUNDS == 20
BF_ENC(r,l,s,p[20]);
BF_ENC(l,r,s,p[19]);
BF_ENC(r,l,s,p[18]);
BF_ENC(l,r,s,p[17]);
#endif
BF_ENC(r,l,s,p[16]);
BF_ENC(l,r,s,p[15]);
BF_ENC(r,l,s,p[14]);
BF_ENC(l,r,s,p[13]);
BF_ENC(r,l,s,p[12]);
BF_ENC(l,r,s,p[11]);
BF_ENC(r,l,s,p[10]);
BF_ENC(l,r,s,p[ 9]);
BF_ENC(r,l,s,p[ 8]);
BF_ENC(l,r,s,p[ 7]);
BF_ENC(r,l,s,p[ 6]);
BF_ENC(l,r,s,p[ 5]);
BF_ENC(r,l,s,p[ 4]);
BF_ENC(l,r,s,p[ 3]);
BF_ENC(r,l,s,p[ 2]);
BF_ENC(l,r,s,p[ 1]);
r^=p[0];
}
data[1]=l&0xffffffff;
data[0]=r&0xffffffff;
}