1 /* $OpenBSD: fcrypt_b.c,v 1.8 2014/06/12 15:49:28 deraadt Exp $ */ 2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 3 * All rights reserved. 4 * 5 * This package is an SSL implementation written 6 * by Eric Young (eay@cryptsoft.com). 7 * The implementation was written so as to conform with Netscapes SSL. 8 * 9 * This library is free for commercial and non-commercial use as long as 10 * the following conditions are aheared to. The following conditions 11 * apply to all code found in this distribution, be it the RC4, RSA, 12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation 13 * included with this distribution is covered by the same copyright terms 14 * except that the holder is Tim Hudson (tjh@cryptsoft.com). 15 * 16 * Copyright remains Eric Young's, and as such any Copyright notices in 17 * the code are not to be removed. 18 * If this package is used in a product, Eric Young should be given attribution 19 * as the author of the parts of the library used. 20 * This can be in the form of a textual message at program startup or 21 * in documentation (online or textual) provided with the package. 22 * 23 * Redistribution and use in source and binary forms, with or without 24 * modification, are permitted provided that the following conditions 25 * are met: 26 * 1. Redistributions of source code must retain the copyright 27 * notice, this list of conditions and the following disclaimer. 28 * 2. Redistributions in binary form must reproduce the above copyright 29 * notice, this list of conditions and the following disclaimer in the 30 * documentation and/or other materials provided with the distribution. 31 * 3. All advertising materials mentioning features or use of this software 32 * must display the following acknowledgement: 33 * "This product includes cryptographic software written by 34 * Eric Young (eay@cryptsoft.com)" 35 * The word 'cryptographic' can be left out if the rouines from the library 36 * being used are not cryptographic related :-). 37 * 4. If you include any Windows specific code (or a derivative thereof) from 38 * the apps directory (application code) you must include an acknowledgement: 39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 40 * 41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 51 * SUCH DAMAGE. 52 * 53 * The licence and distribution terms for any publically available version or 54 * derivative of this code cannot be changed. i.e. this code cannot simply be 55 * copied and put under another distribution licence 56 * [including the GNU Public Licence.] 57 */ 58 59 #include <stdio.h> 60 61 /* This version of crypt has been developed from my MIT compatible 62 * DES library. 63 * The library is available at pub/Crypto/DES at ftp.psy.uq.oz.au 64 * Eric Young (eay@cryptsoft.com) 65 */ 66 67 #define DES_FCRYPT 68 #include "des_locl.h" 69 #undef DES_FCRYPT 70 71 #ifndef OPENBSD_DES_ASM 72 73 #undef PERM_OP 74 #define PERM_OP(a,b,t,n,m) ((t)=((((a)>>(n))^(b))&(m)),\ 75 (b)^=(t),\ 76 (a)^=((t)<<(n))) 77 78 #undef HPERM_OP 79 #define HPERM_OP(a,t,n,m) ((t)=((((a)<<(16-(n)))^(a))&(m)),\ 80 (a)=(a)^(t)^(t>>(16-(n))))\ 81 82 void fcrypt_body(DES_LONG *out, DES_key_schedule *ks, DES_LONG Eswap0, 83 DES_LONG Eswap1) 84 { 85 DES_LONG l,r,t,u; 86 #ifdef DES_PTR 87 const unsigned char *des_SP=(const unsigned char *)DES_SPtrans; 88 #endif 89 DES_LONG *s; 90 int j; 91 DES_LONG E0,E1; 92 93 l=0; 94 r=0; 95 96 s=(DES_LONG *)ks; 97 E0=Eswap0; 98 E1=Eswap1; 99 100 for (j=0; j<25; j++) 101 { 102 #ifndef DES_UNROLL 103 int i; 104 105 for (i=0; i<32; i+=4) 106 { 107 D_ENCRYPT(l,r,i+0); /* 1 */ 108 D_ENCRYPT(r,l,i+2); /* 2 */ 109 } 110 #else 111 D_ENCRYPT(l,r, 0); /* 1 */ 112 D_ENCRYPT(r,l, 2); /* 2 */ 113 D_ENCRYPT(l,r, 4); /* 3 */ 114 D_ENCRYPT(r,l, 6); /* 4 */ 115 D_ENCRYPT(l,r, 8); /* 5 */ 116 D_ENCRYPT(r,l,10); /* 6 */ 117 D_ENCRYPT(l,r,12); /* 7 */ 118 D_ENCRYPT(r,l,14); /* 8 */ 119 D_ENCRYPT(l,r,16); /* 9 */ 120 D_ENCRYPT(r,l,18); /* 10 */ 121 D_ENCRYPT(l,r,20); /* 11 */ 122 D_ENCRYPT(r,l,22); /* 12 */ 123 D_ENCRYPT(l,r,24); /* 13 */ 124 D_ENCRYPT(r,l,26); /* 14 */ 125 D_ENCRYPT(l,r,28); /* 15 */ 126 D_ENCRYPT(r,l,30); /* 16 */ 127 #endif 128 129 t=l; 130 l=r; 131 r=t; 132 } 133 l=ROTATE(l,3)&0xffffffffL; 134 r=ROTATE(r,3)&0xffffffffL; 135 136 PERM_OP(l,r,t, 1,0x55555555L); 137 PERM_OP(r,l,t, 8,0x00ff00ffL); 138 PERM_OP(l,r,t, 2,0x33333333L); 139 PERM_OP(r,l,t,16,0x0000ffffL); 140 PERM_OP(l,r,t, 4,0x0f0f0f0fL); 141 142 out[0]=r; 143 out[1]=l; 144 } 145 146 #endif /* OPENBSD_DES_ASM */ 147