1/*
2 * Copyright 1993 by OpenVision Technologies, Inc.
3 *
4 * Permission to use, copy, modify, distribute, and sell this software
5 * and its documentation for any purpose is hereby granted without fee,
6 * provided that the above copyright notice appears in all copies and
7 * that both that copyright notice and this permission notice appear in
8 * supporting documentation, and that the name of OpenVision not be used
9 * in advertising or publicity pertaining to distribution of the software
10 * without specific, written prior permission. OpenVision makes no
11 * representations about the suitability of this software for any
12 * purpose.  It is provided "as is" without express or implied warranty.
13 *
14 * OPENVISION DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
15 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
16 * EVENT SHALL OPENVISION BE LIABLE FOR ANY SPECIAL, INDIRECT OR
17 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF
18 * USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
19 * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
20 * PERFORMANCE OF THIS SOFTWARE.
21 */
22
23#include "gssapiP_krb5.h"
24#ifdef HAVE_MEMORY_H
25#include <memory.h>
26#endif
27
28static const unsigned char zeros[16] = {0,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0};
29
30krb5_error_code
31kg_make_seed(context, key, seed)
32     krb5_context context;
33     krb5_keyblock *key;
34     unsigned char *seed;
35{
36   krb5_error_code code;
37   krb5_keyblock *tmpkey;
38   int i;
39
40   code = krb5_copy_keyblock(context, key, &tmpkey);
41   if (code)
42      return(code);
43
44   /* reverse the key bytes, as per spec */
45
46   for (i=0; i<tmpkey->length; i++)
47      tmpkey->contents[i] = key->contents[key->length - 1 - i];
48
49   code = kg_encrypt(context, tmpkey, KG_USAGE_SEAL, NULL, zeros, seed, 16);
50
51   krb5_free_keyblock(context, tmpkey);
52
53   return(code);
54}
55