fcrypt_b.c revision 109998
1258945Sroberto/* crypto/des/fcrypt_b.c */ 2258945Sroberto/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 3258945Sroberto * All rights reserved. 4258945Sroberto * 5258945Sroberto * This package is an SSL implementation written 6258945Sroberto * by Eric Young (eay@cryptsoft.com). 7258945Sroberto * The implementation was written so as to conform with Netscapes SSL. 8258945Sroberto * 9258945Sroberto * This library is free for commercial and non-commercial use as long as 10258945Sroberto * the following conditions are aheared to. The following conditions 11258945Sroberto * apply to all code found in this distribution, be it the RC4, RSA, 12258945Sroberto * lhash, DES, etc., code; not just the SSL code. The SSL documentation 13258945Sroberto * included with this distribution is covered by the same copyright terms 14258945Sroberto * except that the holder is Tim Hudson (tjh@cryptsoft.com). 15258945Sroberto * 16258945Sroberto * Copyright remains Eric Young's, and as such any Copyright notices in 17258945Sroberto * the code are not to be removed. 18258945Sroberto * If this package is used in a product, Eric Young should be given attribution 19258945Sroberto * as the author of the parts of the library used. 20258945Sroberto * This can be in the form of a textual message at program startup or 21258945Sroberto * in documentation (online or textual) provided with the package. 22258945Sroberto * 23258945Sroberto * Redistribution and use in source and binary forms, with or without 24258945Sroberto * modification, are permitted provided that the following conditions 25258945Sroberto * are met: 26258945Sroberto * 1. Redistributions of source code must retain the copyright 27258945Sroberto * notice, this list of conditions and the following disclaimer. 28258945Sroberto * 2. Redistributions in binary form must reproduce the above copyright 29258945Sroberto * notice, this list of conditions and the following disclaimer in the 30258945Sroberto * documentation and/or other materials provided with the distribution. 31258945Sroberto * 3. All advertising materials mentioning features or use of this software 32258945Sroberto * must display the following acknowledgement: 33258945Sroberto * "This product includes cryptographic software written by 34258945Sroberto * Eric Young (eay@cryptsoft.com)" 35258945Sroberto * The word 'cryptographic' can be left out if the rouines from the library 36258945Sroberto * being used are not cryptographic related :-). 37258945Sroberto * 4. If you include any Windows specific code (or a derivative thereof) from 38258945Sroberto * the apps directory (application code) you must include an acknowledgement: 39258945Sroberto * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 40258945Sroberto * 41258945Sroberto * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 42258945Sroberto * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 43258945Sroberto * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 44258945Sroberto * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 45258945Sroberto * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 46258945Sroberto * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 47258945Sroberto * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48258945Sroberto * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 49258945Sroberto * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 50258945Sroberto * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 51258945Sroberto * SUCH DAMAGE. 52258945Sroberto * 53258945Sroberto * The licence and distribution terms for any publically available version or 54258945Sroberto * derivative of this code cannot be changed. i.e. this code cannot simply be 55258945Sroberto * copied and put under another distribution licence 56258945Sroberto * [including the GNU Public Licence.] 57258945Sroberto */ 58258945Sroberto 59258945Sroberto#include <stdio.h> 60258945Sroberto 61258945Sroberto/* This version of crypt has been developed from my MIT compatible 62258945Sroberto * DES library. 63258945Sroberto * The library is available at pub/Crypto/DES at ftp.psy.uq.oz.au 64258945Sroberto * Eric Young (eay@cryptsoft.com) 65258945Sroberto */ 66258945Sroberto 67258945Sroberto#define DES_FCRYPT 68258945Sroberto#include "des_locl.h" 69258945Sroberto#undef DES_FCRYPT 70258945Sroberto 71258945Sroberto#undef PERM_OP 72258945Sroberto#define PERM_OP(a,b,t,n,m) ((t)=((((a)>>(n))^(b))&(m)),\ 73258945Sroberto (b)^=(t),\ 74258945Sroberto (a)^=((t)<<(n))) 75258945Sroberto 76258945Sroberto#undef HPERM_OP 77258945Sroberto#define HPERM_OP(a,t,n,m) ((t)=((((a)<<(16-(n)))^(a))&(m)),\ 78258945Sroberto (a)=(a)^(t)^(t>>(16-(n))))\ 79258945Sroberto 80258945Srobertovoid fcrypt_body(DES_LONG *out, DES_key_schedule *ks, DES_LONG Eswap0, 81258945Sroberto DES_LONG Eswap1) 82258945Sroberto { 83258945Sroberto register DES_LONG l,r,t,u; 84258945Sroberto#ifdef DES_PTR 85258945Sroberto register const unsigned char *des_SP=(const unsigned char *)DES_SPtrans; 86258945Sroberto#endif 87258945Sroberto register DES_LONG *s; 88258945Sroberto register int j; 89258945Sroberto register DES_LONG E0,E1; 90258945Sroberto 91258945Sroberto l=0; 92258945Sroberto r=0; 93258945Sroberto 94258945Sroberto s=(DES_LONG *)ks; 95258945Sroberto E0=Eswap0; 96258945Sroberto E1=Eswap1; 97258945Sroberto 98258945Sroberto for (j=0; j<25; j++) 99258945Sroberto { 100258945Sroberto#ifndef DES_UNROLL 101258945Sroberto register int i; 102258945Sroberto 103258945Sroberto for (i=0; i<32; i+=8) 104258945Sroberto { 105258945Sroberto D_ENCRYPT(l,r,i+0); /* 1 */ 106258945Sroberto D_ENCRYPT(r,l,i+2); /* 2 */ 107258945Sroberto D_ENCRYPT(l,r,i+4); /* 1 */ 108258945Sroberto D_ENCRYPT(r,l,i+6); /* 2 */ 109258945Sroberto } 110258945Sroberto#else 111258945Sroberto D_ENCRYPT(l,r, 0); /* 1 */ 112258945Sroberto D_ENCRYPT(r,l, 2); /* 2 */ 113258945Sroberto D_ENCRYPT(l,r, 4); /* 3 */ 114258945Sroberto D_ENCRYPT(r,l, 6); /* 4 */ 115258945Sroberto D_ENCRYPT(l,r, 8); /* 5 */ 116258945Sroberto D_ENCRYPT(r,l,10); /* 6 */ 117258945Sroberto D_ENCRYPT(l,r,12); /* 7 */ 118258945Sroberto D_ENCRYPT(r,l,14); /* 8 */ 119258945Sroberto D_ENCRYPT(l,r,16); /* 9 */ 120258945Sroberto D_ENCRYPT(r,l,18); /* 10 */ 121258945Sroberto D_ENCRYPT(l,r,20); /* 11 */ 122258945Sroberto D_ENCRYPT(r,l,22); /* 12 */ 123258945Sroberto D_ENCRYPT(l,r,24); /* 13 */ 124258945Sroberto D_ENCRYPT(r,l,26); /* 14 */ 125258945Sroberto D_ENCRYPT(l,r,28); /* 15 */ 126258945Sroberto D_ENCRYPT(r,l,30); /* 16 */ 127258945Sroberto#endif 128258945Sroberto 129258945Sroberto t=l; 130258945Sroberto l=r; 131258945Sroberto r=t; 132258945Sroberto } 133258945Sroberto l=ROTATE(l,3)&0xffffffffL; 134258945Sroberto r=ROTATE(r,3)&0xffffffffL; 135258945Sroberto 136258945Sroberto PERM_OP(l,r,t, 1,0x55555555L); 137258945Sroberto PERM_OP(r,l,t, 8,0x00ff00ffL); 138258945Sroberto PERM_OP(l,r,t, 2,0x33333333L); 139258945Sroberto PERM_OP(r,l,t,16,0x0000ffffL); 140258945Sroberto PERM_OP(l,r,t, 4,0x0f0f0f0fL); 141258945Sroberto 142258945Sroberto out[0]=r; 143258945Sroberto out[1]=l; 144258945Sroberto } 145258945Sroberto 146258945Sroberto