store_mkey.c revision 54925bf60766fbb4f1f2d7c843721406a7b7a3fb
/*
* Copyright 2006 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
/*
* 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. Furthermore if you modify this software you must label
* your software as modified software and not distribute it in such a
* fashion that it might be confused with the original M.I.T. software.
* 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 enctype;
char defkeyfile[MAXPATHLEN+1];
krb5_data *realm = krb5_princ_realm(context, mname);
#if HAVE_UMASK
mode_t 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));
defkeyfile[sizeof(defkeyfile) - 1] = '\0';
keyfile = defkeyfile;
}
#if HAVE_UMASK
oumask = umask(077);
#endif
#ifdef ANSI_STDIO
if (!(kf = fopen(keyfile, "wbF")))
#else
if (!(kf = fopen(keyfile, "wF")))
#endif
{
#if HAVE_UMASK
(void) umask(oumask);
#endif
return errno;
}
enctype = key->enctype;
if ((fwrite((krb5_pointer) &enctype,
2, 1, kf) != 1) ||
(fwrite((krb5_pointer) &key->length,
sizeof(key->length), 1, kf) != 1) ||
(fwrite((krb5_pointer) key->contents,
sizeof(key->contents[0]), (unsigned) 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;
}