1/* crypto/des/rand_key.c */ 2/* Copyright (C) 1995-1997 Eric Young (eay@mincom.oz.au) 3 * All rights reserved. 4 * 5 * This package is an SSL implementation written 6 * by Eric Young (eay@mincom.oz.au). 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@mincom.oz.au). 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@mincom.oz.au)" 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@mincom.oz.au)" 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 "des_locl.h" 60#include <time.h> 61 62static int seed=0; 63static des_cblock init; 64 65void des_random_seed(key) 66des_cblock key; 67 { 68 memcpy(init,key,sizeof(des_cblock)); 69 seed=1; 70 } 71 72/* Old source */ 73/* 74void des_random_key(ret) 75unsigned char *ret; 76 { 77 des_key_schedule ks; 78 static DES_LONG c=0; 79 static unsigned short pid=0; 80 static des_cblock data={0x01,0x23,0x45,0x67,0x89,0xab,0xcd,0xef}; 81 des_cblock key; 82 unsigned char *p; 83 DES_LONG t; 84 int i; 85 86#if defined(MSDOS) || defined(WIN32) 87 pid=1; 88#else 89 if (!pid) pid=getpid(); 90#endif 91 p=key; 92 if (seed) 93 { 94 for (i=0; i<8; i++) 95 { 96 data[i] ^= init[i]; 97 init[i]=0; 98 } 99 seed=0; 100 } 101 t=(DES_LONG)time(NULL); 102 l2c(t,p); 103 t=(DES_LONG)((pid)|((c++)<<16)); 104 l2c(t,p); 105 106 des_set_odd_parity((des_cblock *)data); 107 des_set_key((des_cblock *)data,ks); 108 des_cbc_cksum((des_cblock *)key,(des_cblock *)key, 109 (long)sizeof(key),ks,(des_cblock *)data); 110 111 des_set_odd_parity((des_cblock *)key); 112 des_set_key((des_cblock *)key,ks); 113 des_cbc_cksum((des_cblock *)key,(des_cblock *)data, 114 (long)sizeof(key),ks,(des_cblock *)key); 115 116 memcpy(ret,data,sizeof(key)); 117 memset(key,0,sizeof(key)); 118 memset(ks,0,sizeof(ks)); 119 t=0; 120 } 121*/ 122