Annotation of src/usr.bin/chpass/pw_yp.c, Revision 1.17
1.17 ! pvalchev 1: /* $OpenBSD: pw_yp.c,v 1.16 2002/06/27 19:02:40 deraadt Exp $ */
1.1 deraadt 2: /* $NetBSD: pw_yp.c,v 1.5 1995/03/26 04:55:33 glass Exp $ */
3:
4: /*
5: * Copyright (c) 1988 The Regents of the University of California.
6: * All rights reserved.
7: *
8: * Redistribution and use in source and binary forms, with or without
9: * modification, are permitted provided that the following conditions
10: * are met:
11: * 1. Redistributions of source code must retain the above copyright
12: * notice, this list of conditions and the following disclaimer.
13: * 2. Redistributions in binary form must reproduce the above copyright
14: * notice, this list of conditions and the following disclaimer in the
15: * documentation and/or other materials provided with the distribution.
16: * 3. All advertising materials mentioning features or use of this software
17: * must display the following acknowledgement:
18: * This product includes software developed by the University of
19: * California, Berkeley and its contributors.
20: * 4. Neither the name of the University nor the names of its contributors
21: * may be used to endorse or promote products derived from this software
22: * without specific prior written permission.
23: *
24: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34: * SUCH DAMAGE.
35: */
36: #ifndef lint
37: #if 0
38: static char sccsid[] = "@(#)pw_yp.c 1.0 2/2/93";
39: #else
1.17 ! pvalchev 40: static char rcsid[] = "$OpenBSD: pw_yp.c,v 1.16 2002/06/27 19:02:40 deraadt Exp $";
1.1 deraadt 41: #endif
42: #endif /* not lint */
43:
44: #ifdef YP
45:
46: #include <stdio.h>
47: #include <string.h>
48: #include <netdb.h>
49: #include <time.h>
50: #include <pwd.h>
1.8 deraadt 51: #include <err.h>
1.1 deraadt 52: #include <errno.h>
1.16 deraadt 53: #include <unistd.h>
1.7 niklas 54: #include <stdlib.h>
1.1 deraadt 55: #include <rpc/rpc.h>
56: #include <rpcsvc/yp_prot.h>
57: #include <rpcsvc/ypclnt.h>
58: #define passwd yp_passwd_rec
59: #include <rpcsvc/yppasswd.h>
60: #undef passwd
61:
1.9 millert 62: extern char *__progname;
1.1 deraadt 63:
64: static char *domain;
65:
1.8 deraadt 66: int
1.16 deraadt 67: pw_yp(struct passwd *pw, uid_t uid)
1.1 deraadt 68: {
1.17 ! pvalchev 69: char buf[11], *master, *p;
1.5 deraadt 70: int r, rpcport, status, alen;
1.1 deraadt 71: struct yppasswd yppasswd;
72: struct timeval tv;
73: CLIENT *client;
1.16 deraadt 74:
1.1 deraadt 75: /*
76: * Get local domain
77: */
78: if (!domain && (r = yp_get_default_domain(&domain))) {
79: fprintf(stderr, "%s: can't get local YP domain. Reason: %s\n",
1.9 millert 80: __progname, yperr_string(r));
1.1 deraadt 81: return(0);
82: }
83:
84: /*
85: * Find the host for the passwd map; it should be running
86: * the daemon.
87: */
88: if ((r = yp_master(domain, "passwd.byname", &master)) != 0) {
89: fprintf(stderr,
90: "%s: can't find the master YP server. Reason: %s\n",
1.9 millert 91: __progname, yperr_string(r));
1.1 deraadt 92: return(0);
93: }
94:
95: /*
96: * Ask the portmapper for the port of the daemon.
97: */
98: if ((rpcport = getrpcport(master, YPPASSWDPROG, YPPASSWDPROC_UPDATE,
99: IPPROTO_UDP)) == 0) {
100: fprintf(stderr,
101: "%s: master YP server not running yppasswd daemon.\n",
1.9 millert 102: __progname);
1.1 deraadt 103: fprintf(stderr, "\tCan't change password.\n");
104: return(0);
105: }
106:
107: /*
1.15 deraadt 108: * Be sure the port is privileged
1.1 deraadt 109: */
110: if (rpcport >= IPPORT_RESERVED) {
111: (void)fprintf(stderr,
112: "%s: yppasswd daemon running on an invalid port.\n",
1.9 millert 113: __progname);
1.1 deraadt 114: return(0);
115: }
116:
117: /* prompt for old password */
118: bzero(&yppasswd, sizeof yppasswd);
119: yppasswd.oldpass = "none";
120: yppasswd.oldpass = getpass("Old password:");
121: if (!yppasswd.oldpass) {
122: (void)fprintf(stderr, "Cancelled.\n");
123: return(0);
124: }
1.16 deraadt 125:
1.5 deraadt 126: for (alen = 0, p = pw->pw_gecos; *p; p++)
127: if (*p == '&')
128: alen = alen + strlen(pw->pw_name) - 1;
129: if (strlen(pw->pw_name) + 1 + strlen(pw->pw_passwd) + 1 +
1.14 deraadt 130: strlen((snprintf(buf, sizeof buf, "%u", pw->pw_uid), buf)) + 1 +
131: strlen((snprintf(buf, sizeof buf, "%u", pw->pw_gid), buf)) + 1 +
1.5 deraadt 132: strlen(pw->pw_gecos) + alen + 1 + strlen(pw->pw_dir) + 1 +
133: strlen(pw->pw_shell) >= 1023) {
134: warnx("entries too long");
135: return (0);
136: }
137:
1.1 deraadt 138: /* tell rpc.yppasswdd */
139: yppasswd.newpw.pw_name = pw->pw_name;
140: yppasswd.newpw.pw_passwd= pw->pw_passwd;
1.16 deraadt 141: yppasswd.newpw.pw_uid = pw->pw_uid;
1.1 deraadt 142: yppasswd.newpw.pw_gid = pw->pw_gid;
143: yppasswd.newpw.pw_gecos = pw->pw_gecos;
144: yppasswd.newpw.pw_dir = pw->pw_dir;
145: yppasswd.newpw.pw_shell = pw->pw_shell;
1.5 deraadt 146:
1.1 deraadt 147: client = clnt_create(master, YPPASSWDPROG, YPPASSWDVERS, "udp");
148: if (client==NULL) {
149: fprintf(stderr, "can't contact yppasswdd on %s: Reason: %s\n",
150: master, yperr_string(YPERR_YPBIND));
1.6 deraadt 151: return(1);
1.1 deraadt 152: }
153: client->cl_auth = authunix_create_default();
154: tv.tv_sec = 5;
155: tv.tv_usec = 0;
156: r = clnt_call(client, YPPASSWDPROC_UPDATE,
157: xdr_yppasswd, &yppasswd, xdr_int, &status, tv);
158: if (r) {
1.9 millert 159: fprintf(stderr, "%s: rpc to yppasswdd failed. %d\n",
160: __progname, r);
1.4 deraadt 161: clnt_destroy(client);
1.6 deraadt 162: return(1);
1.1 deraadt 163: } else if (status) {
164: printf("Couldn't change YP password information.\n");
1.4 deraadt 165: clnt_destroy(client);
1.6 deraadt 166: return(1);
1.1 deraadt 167: }
168: printf("The YP password information has been changed on %s, the master YP passwd server.\n", master);
169:
1.4 deraadt 170: clnt_destroy(client);
1.6 deraadt 171: return(0);
1.1 deraadt 172: }
173:
174: static char *
1.16 deraadt 175: pwskip(char *p)
1.1 deraadt 176: {
177: while (*p && *p != ':' && *p != '\n')
178: ++p;
179: if (*p)
180: *p++ = 0;
181: return (p);
182: }
183:
184: static struct passwd *
1.16 deraadt 185: interpret(struct passwd *pwent, char *line)
1.1 deraadt 186: {
1.13 mpech 187: char *p = line;
1.1 deraadt 188:
189: pwent->pw_passwd = "*";
190: pwent->pw_uid = 0;
191: pwent->pw_gid = 0;
192: pwent->pw_gecos = "";
193: pwent->pw_dir = "";
194: pwent->pw_shell = "";
195: pwent->pw_change = 0;
196: pwent->pw_expire = 0;
197: pwent->pw_class = "";
1.16 deraadt 198:
1.1 deraadt 199: /* line without colon separators is no good, so ignore it */
200: if(!strchr(p,':'))
201: return(NULL);
202:
203: pwent->pw_name = p;
204: p = pwskip(p);
205: pwent->pw_passwd = p;
206: p = pwskip(p);
207: pwent->pw_uid = (uid_t)strtoul(p, NULL, 10);
208: p = pwskip(p);
209: pwent->pw_gid = (gid_t)strtoul(p, NULL, 10);
210: p = pwskip(p);
211: pwent->pw_gecos = p;
212: p = pwskip(p);
213: pwent->pw_dir = p;
214: p = pwskip(p);
215: pwent->pw_shell = p;
216: while (*p && *p != '\n')
217: p++;
218: *p = '\0';
219: return (pwent);
220: }
221:
1.3 deraadt 222: static char *__yplin;
223:
1.1 deraadt 224: struct passwd *
1.16 deraadt 225: ypgetpwnam(char *nam)
1.1 deraadt 226: {
227: static struct passwd pwent;
1.16 deraadt 228: int reason, vallen;
1.1 deraadt 229: char *val;
1.16 deraadt 230:
1.1 deraadt 231: /*
232: * Get local domain
233: */
234: if (!domain && (reason = yp_get_default_domain(&domain))) {
235: fprintf(stderr, "%s: can't get local YP domain. Reason: %s\n",
1.9 millert 236: __progname, yperr_string(reason));
1.1 deraadt 237: exit(1);
238: }
239:
240: reason = yp_match(domain, "passwd.byname", nam, strlen(nam),
241: &val, &vallen);
242: switch(reason) {
243: case 0:
244: break;
245: default:
246: return (NULL);
247: break;
248: }
249: val[vallen] = '\0';
1.3 deraadt 250: if (__yplin)
251: free(__yplin);
1.11 alex 252: if (!(__yplin = (char *)malloc(vallen + 1)))
253: err(1, NULL);
1.16 deraadt 254: strlcpy(__yplin, val, vallen + 1);
1.1 deraadt 255: free(val);
256:
1.3 deraadt 257: return(interpret(&pwent, __yplin));
1.1 deraadt 258: }
259:
260: struct passwd *
1.16 deraadt 261: ypgetpwuid(uid_t uid)
1.1 deraadt 262: {
263: static struct passwd pwent;
264: int reason, vallen;
1.16 deraadt 265: char namebuf[16], *val;
266:
1.1 deraadt 267: if (!domain && (reason = yp_get_default_domain(&domain))) {
268: fprintf(stderr, "%s: can't get local YP domain. Reason: %s\n",
1.9 millert 269: __progname, yperr_string(reason));
1.1 deraadt 270: exit(1);
271: }
272:
1.16 deraadt 273: snprintf(namebuf, sizeof namebuf, "%u", (u_int)uid);
1.1 deraadt 274: reason = yp_match(domain, "passwd.byuid", namebuf, strlen(namebuf),
275: &val, &vallen);
276: switch(reason) {
277: case 0:
278: break;
279: default:
280: return (NULL);
281: break;
282: }
283: val[vallen] = '\0';
1.3 deraadt 284: if (__yplin)
285: free(__yplin);
1.11 alex 286: if (!(__yplin = (char *)malloc(vallen + 1)))
287: err(1, NULL);
1.16 deraadt 288: strlcpy(__yplin, val, vallen + 1);
1.1 deraadt 289: free(val);
290:
1.3 deraadt 291: return(interpret(&pwent, __yplin));
1.1 deraadt 292: }
293:
294: #endif /* YP */
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