159 lines
5.2 KiB
C
159 lines
5.2 KiB
C
/* crypto/bf/bf_enc.c */
|
|
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
|
|
* All rights reserved.
|
|
*
|
|
* This package is an SSL implementation written
|
|
* by Eric Young (eay@cryptsoft.com).
|
|
* 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@cryptsoft.com).
|
|
*
|
|
* 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@cryptsoft.com)"
|
|
* 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@cryptsoft.com)"
|
|
*
|
|
* 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.]
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__KERNEL_RCSID(0, "$NetBSD: bf_enc.c,v 1.6 2002/02/27 01:32:17 itojun Exp $");
|
|
|
|
#include <sys/types.h>
|
|
#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
|
|
|
|
/* XXX "data" is host endian */
|
|
void
|
|
BF_encrypt(data, key)
|
|
BF_LONG *data;
|
|
BF_KEY *key;
|
|
{
|
|
register BF_LONG l, r, *p, *s;
|
|
|
|
p = key->P;
|
|
s= &key->S[0];
|
|
l = data[0];
|
|
r = data[1];
|
|
|
|
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];
|
|
|
|
data[1] = l & 0xffffffff;
|
|
data[0] = r & 0xffffffff;
|
|
}
|
|
|
|
/* XXX "data" is host endian */
|
|
void
|
|
BF_decrypt(data, key)
|
|
BF_LONG *data;
|
|
BF_KEY *key;
|
|
{
|
|
register BF_LONG l, r, *p, *s;
|
|
|
|
p = key->P;
|
|
s= &key->S[0];
|
|
l = data[0];
|
|
r = data[1];
|
|
|
|
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;
|
|
}
|