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/*
* tkt_string.c
*
* Copyright 1985, 1986, 1987, 1988, 2002 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.
*/
#include "krb.h"
#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#include "port-sockets.h" /* XXX this gets us MAXPATHLEN but we should find
a better way */
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#else
char *getenv();
#endif
#ifdef _WINDOWS
typedef unsigned long uid_t;
uid_t getuid(void) { return 0; }
#endif /* _WINDOWS */
/*
* This routine is used to generate the name of the file that holds
* the user's cache of server tickets and associated session keys.
*
* If it is set, krb_ticket_string contains the ticket file name.
* Otherwise, the filename is constructed as follows:
*
* If it is set, the environment variable "KRBTKFILE" will be used as
* the ticket file name. Otherwise TKT_ROOT (defined in "krb.h") and
* the user's uid are concatenated to produce the ticket file name
* (e.g., "/tmp/tkt123"). A pointer to the string containing the ticket
* file name is returned.
*/
static char krb_ticket_string[MAXPATHLEN];
const char *tkt_string()
{
char *env;
uid_t getuid();
if (!*krb_ticket_string) {
env = getenv("KRBTKFILE");
if (env) {
(void) strncpy(krb_ticket_string, env,
sizeof(krb_ticket_string)-1);
krb_ticket_string[sizeof(krb_ticket_string)-1] = '\0';
} else {
/* 32 bits of signed integer will always fit in 11 characters
(including the sign), so no need to worry about overflow */
(void) sprintf(krb_ticket_string, "%s%d",TKT_ROOT,(int) getuid());
}
}
return krb_ticket_string;
}
/*
* This routine is used to set the name of the file that holds the user's
* cache of server tickets and associated session keys.
*
* The value passed in is copied into local storage.
*
* NOTE: This routine should be called during initialization, before other
* Kerberos routines are called; otherwise tkt_string() above may be called
* and return an undesired ticket file name until this routine is called.
*/
void
krb_set_tkt_string(val)
char *val;
{
(void) strncpy(krb_ticket_string, val, sizeof(krb_ticket_string)-1);
krb_ticket_string[sizeof(krb_ticket_string)-1] = '\0';
}
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