291 lines
8.6 KiB
C
291 lines
8.6 KiB
C
/*
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* Copyright (c) 1988 The Regents of the University of California.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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/*static char sccsid[] = "from: @(#)yp_passwd.c 1.0 2/2/93";*/
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static char rcsid[] = "$Id: yp_passwd.c,v 1.3 1993/08/01 18:10:17 mycroft Exp $";
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#endif /* not lint */
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#ifdef YP
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#include <stdio.h>
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#include <string.h>
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#include <netdb.h>
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#include <time.h>
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#include <pwd.h>
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#include <errno.h>
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#include <rpc/rpc.h>
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#include <rpcsvc/yp_prot.h>
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#include <rpcsvc/ypclnt.h>
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#define passwd yp_passwd_rec
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#include <rpcsvc/yppasswd.h>
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#undef passwd
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#ifndef _PASSWORD_LEN
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#define _PASSWORD_LEN PASS_MAX
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#endif
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extern char *progname;
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static char *getnewpasswd();
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static struct passwd *ypgetpwnam();
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static uid_t uid;
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char *domain;
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yp_passwd(uname)
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char *uname;
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{
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char *master;
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char *pp;
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int r, rpcport, status;
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struct yppasswd yppasswd;
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struct passwd *pw;
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struct timeval tv;
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CLIENT *client;
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uid = getuid();
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/*
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* Get local domain
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*/
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if (r = yp_get_default_domain(&domain)) {
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(void)fprintf(stderr, "%s: can't get local YP domain. Reason: %s\n", progname, yperr_string(r));
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exit(1);
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}
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/*
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* Find the host for the passwd map; it should be running
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* the daemon.
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*/
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if ((r = yp_master(domain, "passwd.byname", &master)) != 0) {
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(void)fprintf(stderr, "%s: can't find the master YP server. Reason: %s\n", progname, yperr_string(r));
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exit(1);
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}
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/*
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* Ask the portmapper for the port of the daemon.
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*/
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if ((rpcport = getrpcport(master, YPPASSWDPROG, YPPASSWDPROC_UPDATE, IPPROTO_UDP)) == 0) {
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(void)fprintf(stderr, "%s: master YP server not running yppasswd daemon.\n\tCan't change password.\n", progname);
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exit(1);
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}
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/*
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* Be sure the port is priviledged
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*/
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if (rpcport >= IPPORT_RESERVED) {
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(void)fprintf(stderr, "%s: yppasswd daemon running on an invalid port.\n", progname);
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exit(1);
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}
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/* Get user's login identity */
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if (!(pw = ypgetpwnam(uname))) {
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(void)fprintf(stderr, "%s: unknown user %s.\n", progname, uname);
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exit(1);
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}
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if (uid && uid != pw->pw_uid) {
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(void)fprintf(stderr, "%s: you are only allowed to change your own password: %s\n", progname, strerror(EACCES));
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exit(1);
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}
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/* prompt for new password */
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yppasswd.newpw.pw_passwd = getnewpasswd(pw, &yppasswd.oldpass);
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/* tell rpc.yppasswdd */
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yppasswd.newpw.pw_name = pw->pw_name;
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yppasswd.newpw.pw_uid = pw->pw_uid;
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yppasswd.newpw.pw_gid = pw->pw_gid;
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yppasswd.newpw.pw_gecos = pw->pw_gecos;
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yppasswd.newpw.pw_dir = pw->pw_dir;
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yppasswd.newpw.pw_shell = pw->pw_shell;
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client = clnt_create(master, YPPASSWDPROG, YPPASSWDVERS, "udp");
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if (client==NULL) {
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fprintf(stderr, "can't contact yppasswdd on %s: Reason: %s\n",
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master, yperr_string(YPERR_YPBIND));
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return(YPERR_YPBIND);
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}
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client->cl_auth = authunix_create_default();
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tv.tv_sec = 2;
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tv.tv_usec = 0;
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r = clnt_call(client, YPPASSWDPROC_UPDATE,
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xdr_yppasswd, &yppasswd, xdr_int, &status, tv);
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if (r)
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fprintf(stderr, "%s: rpc to yppasswdd failed.\n");
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else if (status)
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printf("Couldn't change YP password.\n");
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else
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printf("The YP password has been changed on %s, the master YP passwd server.\n", master);
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exit(0);
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}
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static char *
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getnewpasswd(pw, old_pass)
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register struct passwd *pw;
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char **old_pass;
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{
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static char buf[_PASSWORD_LEN+1];
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register char *p, *t;
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int tries;
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char salt[9], *crypt(), *getpass();
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(void)printf("Changing YP password for %s.\n", pw->pw_name);
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if (uid && old_pass) {
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*old_pass = NULL;
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if (pw->pw_passwd &&
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#ifdef DES
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strcmp(crypt(p = getpass("Old password:"), pw->pw_passwd),
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pw->pw_passwd)) {
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#else
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strcmp(p = getpass("Old password:"), pw->pw_passwd)) {
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#endif
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errno = EACCES;
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pw_error(NULL, 1, 1);
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}
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*old_pass = strdup(p);
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}
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for (buf[0] = '\0', tries = 0;;) {
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p = getpass("New password:");
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if (!*p) {
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(void)printf("Password unchanged.\n");
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pw_error(NULL, 0, 0);
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}
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if (strlen(p) <= 5 && (uid != 0 || ++tries < 2)) {
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(void)printf("Please enter a longer password.\n");
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continue;
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}
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for (t = p; *t && islower(*t); ++t);
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if (!*t && (uid != 0 || ++tries < 2)) {
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(void)printf("Please don't use an all-lower case password.\nUnusual capitalization, control characters or digits are suggested.\n");
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continue;
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}
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(void)strcpy(buf, p);
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if (!strcmp(buf, getpass("Retype new password:")))
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break;
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(void)printf("Mismatch; try again, EOF to quit.\n");
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}
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/* grab a random printable character that isn't a colon */
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(void)srandom((int)time((time_t *)NULL));
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#ifdef NEWSALT
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salt[0] = _PASSWORD_EFMT1;
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to64(&salt[1], (long)(29 * 25), 4);
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to64(&salt[5], random(), 4);
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#else
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to64(&salt[0], random(), 2);
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#endif
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#ifdef DES
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return(strdup(crypt(buf, salt)));
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#else
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return(buf);
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#endif
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}
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static char *
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pwskip(register char *p)
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{
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while (*p && *p != ':' && *p != '\n')
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++p;
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if (*p)
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*p++ = 0;
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return (p);
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}
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struct passwd *
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interpret(struct passwd *pwent, char *line)
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{
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register char *p = line;
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register int c;
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pwent->pw_passwd = "*";
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pwent->pw_uid = 0;
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pwent->pw_gid = 0;
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pwent->pw_gecos = "";
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pwent->pw_dir = "";
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pwent->pw_shell = "";
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pwent->pw_change = 0;
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pwent->pw_expire = 0;
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pwent->pw_class = "";
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/* line without colon separators is no good, so ignore it */
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if(!strchr(p,':'))
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return(NULL);
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pwent->pw_name = p;
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p = pwskip(p);
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pwent->pw_passwd = p;
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p = pwskip(p);
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pwent->pw_uid = (uid_t)strtoul(p, NULL, 10);
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p = pwskip(p);
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pwent->pw_gid = (gid_t)strtoul(p, NULL, 10);
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p = pwskip(p);
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pwent->pw_gecos = p;
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p = pwskip(p);
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pwent->pw_dir = p;
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p = pwskip(p);
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pwent->pw_shell = p;
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while (*p && *p != '\n')
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p++;
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*p = '\0';
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return (pwent);
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}
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static struct passwd *
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ypgetpwnam(nam)
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char *nam;
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{
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static struct passwd pwent;
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static char line[1024];
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char *val;
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int reason, vallen;
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reason = yp_match(domain, "passwd.byname", nam, strlen(nam),
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&val, &vallen);
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switch(reason) {
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case 0:
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break;
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default:
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return (NULL);
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break;
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}
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val[vallen] = '\0';
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strcpy(line, val);
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free(val);
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return(interpret(&pwent, line));
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}
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#endif /* YP */
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