155714Skris/* crypto/des/fcrypt_b.c */ 255714Skris/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 355714Skris * All rights reserved. 455714Skris * 555714Skris * This package is an SSL implementation written 655714Skris * by Eric Young (eay@cryptsoft.com). 755714Skris * The implementation was written so as to conform with Netscapes SSL. 8280304Sjkim * 955714Skris * This library is free for commercial and non-commercial use as long as 1055714Skris * the following conditions are aheared to. The following conditions 1155714Skris * apply to all code found in this distribution, be it the RC4, RSA, 1255714Skris * lhash, DES, etc., code; not just the SSL code. The SSL documentation 1355714Skris * included with this distribution is covered by the same copyright terms 1455714Skris * except that the holder is Tim Hudson (tjh@cryptsoft.com). 15280304Sjkim * 1655714Skris * Copyright remains Eric Young's, and as such any Copyright notices in 1755714Skris * the code are not to be removed. 1855714Skris * If this package is used in a product, Eric Young should be given attribution 1955714Skris * as the author of the parts of the library used. 2055714Skris * This can be in the form of a textual message at program startup or 2155714Skris * in documentation (online or textual) provided with the package. 22280304Sjkim * 2355714Skris * Redistribution and use in source and binary forms, with or without 2455714Skris * modification, are permitted provided that the following conditions 2555714Skris * are met: 2655714Skris * 1. Redistributions of source code must retain the copyright 2755714Skris * notice, this list of conditions and the following disclaimer. 2855714Skris * 2. Redistributions in binary form must reproduce the above copyright 2955714Skris * notice, this list of conditions and the following disclaimer in the 3055714Skris * documentation and/or other materials provided with the distribution. 3155714Skris * 3. All advertising materials mentioning features or use of this software 3255714Skris * must display the following acknowledgement: 3355714Skris * "This product includes cryptographic software written by 3455714Skris * Eric Young (eay@cryptsoft.com)" 3555714Skris * The word 'cryptographic' can be left out if the rouines from the library 3655714Skris * being used are not cryptographic related :-). 37280304Sjkim * 4. If you include any Windows specific code (or a derivative thereof) from 3855714Skris * the apps directory (application code) you must include an acknowledgement: 3955714Skris * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 40280304Sjkim * 4155714Skris * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 4255714Skris * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 4355714Skris * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 4455714Skris * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 4555714Skris * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 4655714Skris * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 4755714Skris * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 4855714Skris * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 4955714Skris * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 5055714Skris * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 5155714Skris * SUCH DAMAGE. 52280304Sjkim * 5355714Skris * The licence and distribution terms for any publically available version or 5455714Skris * derivative of this code cannot be changed. i.e. this code cannot simply be 5555714Skris * copied and put under another distribution licence 5655714Skris * [including the GNU Public Licence.] 5755714Skris */ 5855714Skris 5955714Skris#include <stdio.h> 6055714Skris 61280304Sjkim/* 62280304Sjkim * This version of crypt has been developed from my MIT compatible DES 63280304Sjkim * library. The library is available at pub/Crypto/DES at ftp.psy.uq.oz.au 6455714Skris * Eric Young (eay@cryptsoft.com) 6555714Skris */ 6655714Skris 6755714Skris#define DES_FCRYPT 6855714Skris#include "des_locl.h" 6955714Skris#undef DES_FCRYPT 7055714Skris 7155714Skris#undef PERM_OP 7255714Skris#define PERM_OP(a,b,t,n,m) ((t)=((((a)>>(n))^(b))&(m)),\ 73280304Sjkim (b)^=(t),\ 74280304Sjkim (a)^=((t)<<(n))) 7555714Skris 7655714Skris#undef HPERM_OP 7755714Skris#define HPERM_OP(a,t,n,m) ((t)=((((a)<<(16-(n)))^(a))&(m)),\ 78280304Sjkim (a)=(a)^(t)^(t>>(16-(n))))\ 7955714Skris 80109998Smarkmvoid fcrypt_body(DES_LONG *out, DES_key_schedule *ks, DES_LONG Eswap0, 81280304Sjkim DES_LONG Eswap1) 82280304Sjkim{ 83280304Sjkim register DES_LONG l, r, t, u; 8455714Skris#ifdef DES_PTR 85280304Sjkim register const unsigned char *des_SP = (const unsigned char *)DES_SPtrans; 8655714Skris#endif 87280304Sjkim register DES_LONG *s; 88280304Sjkim register int j; 89280304Sjkim register DES_LONG E0, E1; 9055714Skris 91280304Sjkim l = 0; 92280304Sjkim r = 0; 9355714Skris 94280304Sjkim s = (DES_LONG *)ks; 95280304Sjkim E0 = Eswap0; 96280304Sjkim E1 = Eswap1; 9755714Skris 98280304Sjkim for (j = 0; j < 25; j++) { 9959191Skris#ifndef DES_UNROLL 100280304Sjkim register int i; 10155714Skris 102280304Sjkim for (i = 0; i < 32; i += 4) { 103280304Sjkim D_ENCRYPT(l, r, i + 0); /* 1 */ 104280304Sjkim D_ENCRYPT(r, l, i + 2); /* 2 */ 105280304Sjkim } 10655714Skris#else 107280304Sjkim D_ENCRYPT(l, r, 0); /* 1 */ 108280304Sjkim D_ENCRYPT(r, l, 2); /* 2 */ 109280304Sjkim D_ENCRYPT(l, r, 4); /* 3 */ 110280304Sjkim D_ENCRYPT(r, l, 6); /* 4 */ 111280304Sjkim D_ENCRYPT(l, r, 8); /* 5 */ 112280304Sjkim D_ENCRYPT(r, l, 10); /* 6 */ 113280304Sjkim D_ENCRYPT(l, r, 12); /* 7 */ 114280304Sjkim D_ENCRYPT(r, l, 14); /* 8 */ 115280304Sjkim D_ENCRYPT(l, r, 16); /* 9 */ 116280304Sjkim D_ENCRYPT(r, l, 18); /* 10 */ 117280304Sjkim D_ENCRYPT(l, r, 20); /* 11 */ 118280304Sjkim D_ENCRYPT(r, l, 22); /* 12 */ 119280304Sjkim D_ENCRYPT(l, r, 24); /* 13 */ 120280304Sjkim D_ENCRYPT(r, l, 26); /* 14 */ 121280304Sjkim D_ENCRYPT(l, r, 28); /* 15 */ 122280304Sjkim D_ENCRYPT(r, l, 30); /* 16 */ 12355714Skris#endif 12455714Skris 125280304Sjkim t = l; 126280304Sjkim l = r; 127280304Sjkim r = t; 128280304Sjkim } 129280304Sjkim l = ROTATE(l, 3) & 0xffffffffL; 130280304Sjkim r = ROTATE(r, 3) & 0xffffffffL; 13155714Skris 132280304Sjkim PERM_OP(l, r, t, 1, 0x55555555L); 133280304Sjkim PERM_OP(r, l, t, 8, 0x00ff00ffL); 134280304Sjkim PERM_OP(l, r, t, 2, 0x33333333L); 135280304Sjkim PERM_OP(r, l, t, 16, 0x0000ffffL); 136280304Sjkim PERM_OP(l, r, t, 4, 0x0f0f0f0fL); 13755714Skris 138280304Sjkim out[0] = r; 139280304Sjkim out[1] = l; 140280304Sjkim} 141