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