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/*
* Copyright (c) 1992/3 Theo de Raadt <deraadt@fsa.ca>
* Copyright (c) 1994 Olaf Kirch <okir@monad.swb.de>
* Copyright (c) 1995 Bill Paul <wpaul@ctr.columbia.edu>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote
* products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifdef YP
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <netdb.h>
#include <time.h>
#include <sys/types.h>
#include <pwd.h>
#include <errno.h>
#include <unistd.h>
#include <limits.h>
#include <rpc/rpc.h>
#include <rpcsvc/yp_prot.h>
#include <rpcsvc/ypclnt.h>
#include <rpcsvc/yppasswd.h>
#include <pw_yp.h>
extern char *prog_name;
uid_t uid;
extern char *getnewpasswd __P(( struct passwd * , int ));
char *
getserver( void )
{
char *domainname, *master;
int port, err;
int getrpcport();
if ((err = yp_get_default_domain(&domainname)) != 0) {
fprintf(stderr, "%s: can't get local yp domain: %s\n",
prog_name, yperr_string(err));
return NULL;
}
if ((err = yp_master(domainname, "passwd.byname", &master)) != 0) {
fprintf(stderr, "%s: can't find the master ypserver: %s\n",
prog_name, yperr_string(err));
return NULL;
}
port = getrpcport(master, YPPASSWDPROG, YPPASSWDPROC_UPDATE, IPPROTO_UDP);
if (port==0) {
fprintf (stderr, "%s: yppasswdd not running on NIS master host\n",
prog_name);
return NULL;
}
if (port >= IPPORT_RESERVED) {
fprintf (stderr, "%s: yppasswd daemon running on illegal port.\n",
prog_name);
return NULL;
}
return master;
}
int
yp_passwd(char *user)
{
struct timeval timeout;
struct yppasswd yppasswd;
struct passwd *pw;
CLIENT *clnt;
char *master;
int err, status;
char *s;
if ((master = getserver()) == NULL) {
exit(1);
}
/* Obtain the passwd struct for the user whose password is to be changed.
*/
uid = getuid();
if (user == NULL) {
if ((pw = getpwuid(uid)) == NULL) {
fprintf ( stderr, "%s: unknown user (uid=%d).\n",
prog_name, (int)uid );
exit(1);
}
} else {
if ((pw = getpwnam(user)) == NULL) {
fprintf ( stderr, "%s: unknown user: %s.\n", prog_name, user );
exit(1);
}
if (pw->pw_uid != uid && uid != 0) {
fprintf ( stderr, "%s: Only root may change account information "
"for others\n", prog_name );
exit(1);
}
}
/* Use the correct password */
pw = (struct passwd *)&yp_password;
/* Initialize password information */
yppasswd.newpw.pw_passwd = pw->pw_passwd;
yppasswd.newpw.pw_name = pw->pw_name;
yppasswd.newpw.pw_uid = pw->pw_uid;
yppasswd.newpw.pw_gid = pw->pw_gid;
yppasswd.newpw.pw_gecos = pw->pw_gecos;
yppasswd.newpw.pw_dir = pw->pw_dir;
yppasswd.newpw.pw_shell = pw->pw_shell;
yppasswd.oldpass = NULL;
printf("Changing NIS password for %s on %s.\n", pw->pw_name, master);
/* Get old password */
if(pw->pw_passwd[0]) {
s = getpass ("Old password: ");
if( strcmp(crypt(s, pw->pw_passwd), pw->pw_passwd)) {
fprintf(stderr, "Sorry.\n");
exit (1);
}
yppasswd.oldpass = strdup(s);
} else
yppasswd.oldpass = "";
if ((s = getnewpasswd(pw, 1)) == NULL)
exit (1);
yppasswd.newpw.pw_passwd = s;
/* The yppasswd.x file said `unix authentication required',
* so I added it. This is the only reason it is in here.
* My yppasswdd doesn't use it, but maybe some others out there
* do. --okir
*/
clnt = clnt_create( master, YPPASSWDPROG, YPPASSWDVERS, "udp" );
clnt->cl_auth = authunix_create_default();
bzero( (char*)&status, sizeof(status) );
timeout.tv_sec = 25; timeout.tv_usec = 0;
err = clnt_call( clnt, YPPASSWDPROC_UPDATE,
xdr_yppasswd, (char*)&yppasswd,
xdr_int, (char*)&status,
&timeout );
if (err) {
clnt_perrno(err);
fprintf( stderr, "\n" );
} else if (status) {
fprintf( stderr, "Error while changing NIS password.\n");
}
printf("\nNIS password has%s been changed on %s.\n",
(err || status)? " not" : "", master);
auth_destroy( clnt->cl_auth );
clnt_destroy( clnt );
exit ((err || status) != 0);
}
#endif /* YP */
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