1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
|
/*
* lib/kdb/store_mkey.c
*
* Copyright 1990 by the Massachusetts Institute of Technology.
* All Rights Reserved.
*
* Export of this software from the United States of America may
* require a specific license from the United States Government.
* It is the responsibility of any person or organization contemplating
* export to obtain such a license before exporting.
*
* WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
* distribute this software and its documentation for any purpose and
* without fee is hereby granted, provided that the above copyright
* notice appear in all copies and that both that copyright notice and
* this permission notice appear in supporting documentation, and that
* the name of M.I.T. not be used in advertising or publicity pertaining
* to distribution of the software without specific, written prior
* permission. M.I.T. makes no representations about the suitability of
* this software for any purpose. It is provided "as is" without express
* or implied warranty.
*
*
* krb5_db_store_mkey():
* Store a database master key in a file.
*/
#include <errno.h>
#include "k5-int.h"
/* Just in case sysincl.h didn't get it */
#ifndef MAXPATHLEN
#define MAXPATHLEN 1024
#endif
/*
* Put the KDC database master key into a file. If keyfile is NULL,
* then a default name derived from the principal name mname is used.
*/
#ifndef min
#define min(a,b) (((a) < (b)) ? (a) : (b))
#endif
krb5_error_code
krb5_db_store_mkey(context, keyfile, mname, key)
krb5_context context;
char *keyfile;
krb5_principal mname;
krb5_keyblock *key;
{
FILE *kf;
krb5_error_code retval = 0;
krb5_ui_2 keytype;
char defkeyfile[MAXPATHLEN+1];
krb5_data *realm = krb5_princ_realm(context, mname);
#if HAVE_UMASK
int oumask;
#endif
if (!keyfile) {
(void) strcpy(defkeyfile, DEFAULT_KEYFILE_STUB);
(void) strncat(defkeyfile, realm->data,
min(sizeof(defkeyfile)-sizeof(DEFAULT_KEYFILE_STUB)-1,
realm->length));
(void) strcat(defkeyfile, "");
keyfile = defkeyfile;
}
#if HAVE_UMASK
oumask = umask(077);
#endif
#ifdef ANSI_STDIO
if (!(kf = fopen(keyfile, "wb")))
#else
if (!(kf = fopen(keyfile, "w")))
#endif
{
#if HAVE_UMASK
(void) umask(oumask);
#endif
return errno;
}
keytype = key->keytype;
if ((fwrite((krb5_pointer) &keytype,
2, 1, kf) != 1) ||
(fwrite((krb5_pointer) &key->length,
sizeof(key->length), 1, kf) != 1) ||
(fwrite((krb5_pointer) key->contents,
sizeof(key->contents[0]), key->length, kf) != key->length)) {
retval = errno;
(void) fclose(kf);
}
if (fclose(kf) == EOF)
retval = errno;
#if HAVE_UMASK
(void) umask(oumask);
#endif
return retval;
}
|