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/* $OpenBSD: krb_passwd.c,v 1.15 2002/06/12 06:07:16 mpech Exp $ */
/* $KTH: kpasswd.c,v 1.25 1997/05/02 14:28:51 assar Exp $ */
/*
* This source code is no longer held under any constraint of USA
* `cryptographic laws' since it was exported legally. The cryptographic
* functions were removed from the code and a "Bones" distribution was
* made. A Commodity Jurisdiction Request #012-94 was filed with the
* USA State Department, who handed it to the Commerce department. The
* code was determined to fall under General License GTDA under ECCN 5D96G,
* and hence exportable. The cryptographic interfaces were re-added by Eric
* Young, and then KTH proceeded to maintain the code in the free world.
*
*/
/*
* Copyright (C) 1989 by the Massachusetts Institute of Technology
*
* Export of this software from the United States of America is assumed
* to 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.
*
*/
/*
* change your password with kerberos
*/
#ifdef KERBEROS
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <netinet/in.h>
#include <des.h>
#include <kerberosIV/krb.h>
#include <kerberosIV/kadm.h>
#include <kerberosIV/kadm_err.h>
#include <netdb.h>
#include <signal.h>
#include <pwd.h>
#include <err.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <com_err.h>
char realm[REALM_SZ];
extern void usage(int value);
extern int get_pw_new_pwd(char *pword, int pwlen, krb_principal *pr,
int print_realm);
int
krb_passwd(int argc, char **argv)
{
krb_principal principal;
krb_principal default_principal;
int realm_given = 0; /* True if realm was give on cmdline */
int use_default = 1; /* True if we should use default name */
int status; /* return code */
char pword[MAX_KPW_LEN];
int c;
char tktstring[MAXPATHLEN];
seteuid(getuid());
memset (&principal, 0, sizeof(principal));
memset (&default_principal, 0, sizeof(default_principal));
krb_get_default_principal (default_principal.name,
default_principal.instance,
default_principal.realm);
while ((c = getopt(argc, argv, "u:n:i:r:h")) != -1) {
switch (c) {
case 'u':
status = krb_parse_name (optarg, &principal);
if (status != KSUCCESS)
errx (2, "%s", krb_get_err_text(status));
if (principal.realm[0])
realm_given++;
else if (krb_get_lrealm(principal.realm, 1) != KSUCCESS)
errx (1, "Could not find default realm!");
break;
case 'n':
if (k_isname(optarg))
strncpy(principal.name, optarg, sizeof(principal.name) - 1);
else {
warnx("Bad name: %s", optarg);
usage(1);
}
break;
case 'i':
if (k_isinst(optarg))
strncpy(principal.instance,
optarg,
sizeof(principal.instance) - 1);
else {
warnx("Bad instance: %s", optarg);
usage(1);
}
break;
case 'r':
if (k_isrealm(optarg)) {
strncpy(principal.realm, optarg, sizeof(principal.realm) - 1);
realm_given++;
} else {
warnx("Bad realm: %s", optarg);
usage(1);
}
break;
case 'h':
usage(0);
break;
default:
usage(1);
break;
}
use_default = 0;
}
if (optind < argc) {
use_default = 0;
status = krb_parse_name (argv[optind], &principal);
if(status != KSUCCESS)
errx (1, "%s", krb_get_err_text (status));
}
if (use_default) {
strncpy(principal.name, default_principal.name, ANAME_SZ - 1);
principal.name[ANAME_SZ - 1] = '\0';
strncpy(principal.instance, default_principal.instance, INST_SZ - 1);
principal.instance[INST_SZ - 1] = '\0';
strncpy(principal.realm, default_principal.realm, REALM_SZ - 1);
principal.realm[REALM_SZ - 1] = '\0';
} else {
if (!principal.name[0]) {
strncpy(principal.name, default_principal.name, ANAME_SZ - 1);
principal.name[ANAME_SZ - 1] = '\0';
}
if (!principal.realm[0]) {
strncpy(principal.realm, default_principal.realm, REALM_SZ - 1);
principal.realm[REALM_SZ - 1] = '\0';
}
}
snprintf(tktstring, sizeof(tktstring),
"%s_cpw_%ld", TKT_ROOT, (long)getpid());
krb_set_tkt_string(tktstring);
if (get_pw_new_pwd(pword, sizeof(pword), &principal,
realm_given)) {
dest_tkt ();
exit(1);
}
status = kadm_init_link (PWSERV_NAME, KRB_MASTER, principal.realm);
if (status != KADM_SUCCESS)
com_err(argv[0], status, "while initializing");
else {
des_cblock newkey;
char *pw_msg; /* message from server */
des_string_to_key(pword, &newkey);
status = kadm_change_pw_plain((unsigned char*)&newkey, pword, &pw_msg);
memset(newkey, 0, sizeof(newkey));
if (status == KADM_INSECURE_PW)
warnx ("Insecure password: %s", pw_msg);
else if (status != KADM_SUCCESS)
com_err(argv[0], status, " attempting to change password.");
}
memset(pword, 0, sizeof(pword));
if (status != KADM_SUCCESS)
fprintf(stderr,"Password NOT changed.\n");
else
printf("Password changed.\n");
dest_tkt();
if (status)
return 2;
else
return 0;
}
#endif /* KERBEROS */
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