mirror of
https://github.com/oxen-io/session-android.git
synced 2024-12-18 14:07:30 +00:00
144 lines
4.8 KiB
C
144 lines
4.8 KiB
C
/* crypto/des/fcrypt_b.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 <stdio.h>
|
|
|
|
/* This version of crypt has been developed from my MIT compatible
|
|
* DES library.
|
|
* The library is available at pub/Crypto/DES at ftp.psy.uq.oz.au
|
|
* Eric Young (eay@cryptsoft.com)
|
|
*/
|
|
|
|
#define DES_FCRYPT
|
|
#include "des_locl.h"
|
|
#undef DES_FCRYPT
|
|
|
|
#undef PERM_OP
|
|
#define PERM_OP(a,b,t,n,m) ((t)=((((a)>>(n))^(b))&(m)),\
|
|
(b)^=(t),\
|
|
(a)^=((t)<<(n)))
|
|
|
|
#undef HPERM_OP
|
|
#define HPERM_OP(a,t,n,m) ((t)=((((a)<<(16-(n)))^(a))&(m)),\
|
|
(a)=(a)^(t)^(t>>(16-(n))))\
|
|
|
|
void fcrypt_body(DES_LONG *out, DES_key_schedule *ks, DES_LONG Eswap0,
|
|
DES_LONG Eswap1)
|
|
{
|
|
register DES_LONG l,r,t,u;
|
|
#ifdef DES_PTR
|
|
register const unsigned char *des_SP=(const unsigned char *)DES_SPtrans;
|
|
#endif
|
|
register DES_LONG *s;
|
|
register int j;
|
|
register DES_LONG E0,E1;
|
|
|
|
l=0;
|
|
r=0;
|
|
|
|
s=(DES_LONG *)ks;
|
|
E0=Eswap0;
|
|
E1=Eswap1;
|
|
|
|
for (j=0; j<25; j++)
|
|
{
|
|
#ifndef DES_UNROLL
|
|
register int i;
|
|
|
|
for (i=0; i<32; i+=4)
|
|
{
|
|
D_ENCRYPT(l,r,i+0); /* 1 */
|
|
D_ENCRYPT(r,l,i+2); /* 2 */
|
|
}
|
|
#else
|
|
D_ENCRYPT(l,r, 0); /* 1 */
|
|
D_ENCRYPT(r,l, 2); /* 2 */
|
|
D_ENCRYPT(l,r, 4); /* 3 */
|
|
D_ENCRYPT(r,l, 6); /* 4 */
|
|
D_ENCRYPT(l,r, 8); /* 5 */
|
|
D_ENCRYPT(r,l,10); /* 6 */
|
|
D_ENCRYPT(l,r,12); /* 7 */
|
|
D_ENCRYPT(r,l,14); /* 8 */
|
|
D_ENCRYPT(l,r,16); /* 9 */
|
|
D_ENCRYPT(r,l,18); /* 10 */
|
|
D_ENCRYPT(l,r,20); /* 11 */
|
|
D_ENCRYPT(r,l,22); /* 12 */
|
|
D_ENCRYPT(l,r,24); /* 13 */
|
|
D_ENCRYPT(r,l,26); /* 14 */
|
|
D_ENCRYPT(l,r,28); /* 15 */
|
|
D_ENCRYPT(r,l,30); /* 16 */
|
|
#endif
|
|
|
|
t=l;
|
|
l=r;
|
|
r=t;
|
|
}
|
|
l=ROTATE(l,3)&0xffffffffL;
|
|
r=ROTATE(r,3)&0xffffffffL;
|
|
|
|
PERM_OP(l,r,t, 1,0x55555555L);
|
|
PERM_OP(r,l,t, 8,0x00ff00ffL);
|
|
PERM_OP(l,r,t, 2,0x33333333L);
|
|
PERM_OP(r,l,t,16,0x0000ffffL);
|
|
PERM_OP(l,r,t, 4,0x0f0f0f0fL);
|
|
|
|
out[0]=r;
|
|
out[1]=l;
|
|
}
|
|
|