Annotation of src/usr.bin/chpass/pw_yp.c, Revision 1.18
1.18 ! millert 1: /* $OpenBSD: pw_yp.c,v 1.17 2003/04/17 07:37:04 pvalchev 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.
1.18 ! millert 16: * 3. Neither the name of the University nor the names of its contributors
1.1 deraadt 17: * may be used to endorse or promote products derived from this software
18: * without specific prior written permission.
19: *
20: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30: * SUCH DAMAGE.
31: */
32: #ifndef lint
33: #if 0
34: static char sccsid[] = "@(#)pw_yp.c 1.0 2/2/93";
35: #else
1.18 ! millert 36: static char rcsid[] = "$OpenBSD: pw_yp.c,v 1.17 2003/04/17 07:37:04 pvalchev Exp $";
1.1 deraadt 37: #endif
38: #endif /* not lint */
39:
40: #ifdef YP
41:
42: #include <stdio.h>
43: #include <string.h>
44: #include <netdb.h>
45: #include <time.h>
46: #include <pwd.h>
1.8 deraadt 47: #include <err.h>
1.1 deraadt 48: #include <errno.h>
1.16 deraadt 49: #include <unistd.h>
1.7 niklas 50: #include <stdlib.h>
1.1 deraadt 51: #include <rpc/rpc.h>
52: #include <rpcsvc/yp_prot.h>
53: #include <rpcsvc/ypclnt.h>
54: #define passwd yp_passwd_rec
55: #include <rpcsvc/yppasswd.h>
56: #undef passwd
57:
1.9 millert 58: extern char *__progname;
1.1 deraadt 59:
60: static char *domain;
61:
1.8 deraadt 62: int
1.16 deraadt 63: pw_yp(struct passwd *pw, uid_t uid)
1.1 deraadt 64: {
1.17 pvalchev 65: char buf[11], *master, *p;
1.5 deraadt 66: int r, rpcport, status, alen;
1.1 deraadt 67: struct yppasswd yppasswd;
68: struct timeval tv;
69: CLIENT *client;
1.16 deraadt 70:
1.1 deraadt 71: /*
72: * Get local domain
73: */
74: if (!domain && (r = yp_get_default_domain(&domain))) {
75: fprintf(stderr, "%s: can't get local YP domain. Reason: %s\n",
1.9 millert 76: __progname, yperr_string(r));
1.1 deraadt 77: return(0);
78: }
79:
80: /*
81: * Find the host for the passwd map; it should be running
82: * the daemon.
83: */
84: if ((r = yp_master(domain, "passwd.byname", &master)) != 0) {
85: fprintf(stderr,
86: "%s: can't find the master YP server. Reason: %s\n",
1.9 millert 87: __progname, yperr_string(r));
1.1 deraadt 88: return(0);
89: }
90:
91: /*
92: * Ask the portmapper for the port of the daemon.
93: */
94: if ((rpcport = getrpcport(master, YPPASSWDPROG, YPPASSWDPROC_UPDATE,
95: IPPROTO_UDP)) == 0) {
96: fprintf(stderr,
97: "%s: master YP server not running yppasswd daemon.\n",
1.9 millert 98: __progname);
1.1 deraadt 99: fprintf(stderr, "\tCan't change password.\n");
100: return(0);
101: }
102:
103: /*
1.15 deraadt 104: * Be sure the port is privileged
1.1 deraadt 105: */
106: if (rpcport >= IPPORT_RESERVED) {
107: (void)fprintf(stderr,
108: "%s: yppasswd daemon running on an invalid port.\n",
1.9 millert 109: __progname);
1.1 deraadt 110: return(0);
111: }
112:
113: /* prompt for old password */
114: bzero(&yppasswd, sizeof yppasswd);
115: yppasswd.oldpass = "none";
116: yppasswd.oldpass = getpass("Old password:");
117: if (!yppasswd.oldpass) {
118: (void)fprintf(stderr, "Cancelled.\n");
119: return(0);
120: }
1.16 deraadt 121:
1.5 deraadt 122: for (alen = 0, p = pw->pw_gecos; *p; p++)
123: if (*p == '&')
124: alen = alen + strlen(pw->pw_name) - 1;
125: if (strlen(pw->pw_name) + 1 + strlen(pw->pw_passwd) + 1 +
1.14 deraadt 126: strlen((snprintf(buf, sizeof buf, "%u", pw->pw_uid), buf)) + 1 +
127: strlen((snprintf(buf, sizeof buf, "%u", pw->pw_gid), buf)) + 1 +
1.5 deraadt 128: strlen(pw->pw_gecos) + alen + 1 + strlen(pw->pw_dir) + 1 +
129: strlen(pw->pw_shell) >= 1023) {
130: warnx("entries too long");
131: return (0);
132: }
133:
1.1 deraadt 134: /* tell rpc.yppasswdd */
135: yppasswd.newpw.pw_name = pw->pw_name;
136: yppasswd.newpw.pw_passwd= pw->pw_passwd;
1.16 deraadt 137: yppasswd.newpw.pw_uid = pw->pw_uid;
1.1 deraadt 138: yppasswd.newpw.pw_gid = pw->pw_gid;
139: yppasswd.newpw.pw_gecos = pw->pw_gecos;
140: yppasswd.newpw.pw_dir = pw->pw_dir;
141: yppasswd.newpw.pw_shell = pw->pw_shell;
1.5 deraadt 142:
1.1 deraadt 143: client = clnt_create(master, YPPASSWDPROG, YPPASSWDVERS, "udp");
144: if (client==NULL) {
145: fprintf(stderr, "can't contact yppasswdd on %s: Reason: %s\n",
146: master, yperr_string(YPERR_YPBIND));
1.6 deraadt 147: return(1);
1.1 deraadt 148: }
149: client->cl_auth = authunix_create_default();
150: tv.tv_sec = 5;
151: tv.tv_usec = 0;
152: r = clnt_call(client, YPPASSWDPROC_UPDATE,
153: xdr_yppasswd, &yppasswd, xdr_int, &status, tv);
154: if (r) {
1.9 millert 155: fprintf(stderr, "%s: rpc to yppasswdd failed. %d\n",
156: __progname, r);
1.4 deraadt 157: clnt_destroy(client);
1.6 deraadt 158: return(1);
1.1 deraadt 159: } else if (status) {
160: printf("Couldn't change YP password information.\n");
1.4 deraadt 161: clnt_destroy(client);
1.6 deraadt 162: return(1);
1.1 deraadt 163: }
164: printf("The YP password information has been changed on %s, the master YP passwd server.\n", master);
165:
1.4 deraadt 166: clnt_destroy(client);
1.6 deraadt 167: return(0);
1.1 deraadt 168: }
169:
170: static char *
1.16 deraadt 171: pwskip(char *p)
1.1 deraadt 172: {
173: while (*p && *p != ':' && *p != '\n')
174: ++p;
175: if (*p)
176: *p++ = 0;
177: return (p);
178: }
179:
180: static struct passwd *
1.16 deraadt 181: interpret(struct passwd *pwent, char *line)
1.1 deraadt 182: {
1.13 mpech 183: char *p = line;
1.1 deraadt 184:
185: pwent->pw_passwd = "*";
186: pwent->pw_uid = 0;
187: pwent->pw_gid = 0;
188: pwent->pw_gecos = "";
189: pwent->pw_dir = "";
190: pwent->pw_shell = "";
191: pwent->pw_change = 0;
192: pwent->pw_expire = 0;
193: pwent->pw_class = "";
1.16 deraadt 194:
1.1 deraadt 195: /* line without colon separators is no good, so ignore it */
196: if(!strchr(p,':'))
197: return(NULL);
198:
199: pwent->pw_name = p;
200: p = pwskip(p);
201: pwent->pw_passwd = p;
202: p = pwskip(p);
203: pwent->pw_uid = (uid_t)strtoul(p, NULL, 10);
204: p = pwskip(p);
205: pwent->pw_gid = (gid_t)strtoul(p, NULL, 10);
206: p = pwskip(p);
207: pwent->pw_gecos = p;
208: p = pwskip(p);
209: pwent->pw_dir = p;
210: p = pwskip(p);
211: pwent->pw_shell = p;
212: while (*p && *p != '\n')
213: p++;
214: *p = '\0';
215: return (pwent);
216: }
217:
1.3 deraadt 218: static char *__yplin;
219:
1.1 deraadt 220: struct passwd *
1.16 deraadt 221: ypgetpwnam(char *nam)
1.1 deraadt 222: {
223: static struct passwd pwent;
1.16 deraadt 224: int reason, vallen;
1.1 deraadt 225: char *val;
1.16 deraadt 226:
1.1 deraadt 227: /*
228: * Get local domain
229: */
230: if (!domain && (reason = yp_get_default_domain(&domain))) {
231: fprintf(stderr, "%s: can't get local YP domain. Reason: %s\n",
1.9 millert 232: __progname, yperr_string(reason));
1.1 deraadt 233: exit(1);
234: }
235:
236: reason = yp_match(domain, "passwd.byname", nam, strlen(nam),
237: &val, &vallen);
238: switch(reason) {
239: case 0:
240: break;
241: default:
242: return (NULL);
243: break;
244: }
245: val[vallen] = '\0';
1.3 deraadt 246: if (__yplin)
247: free(__yplin);
1.11 alex 248: if (!(__yplin = (char *)malloc(vallen + 1)))
249: err(1, NULL);
1.16 deraadt 250: strlcpy(__yplin, val, vallen + 1);
1.1 deraadt 251: free(val);
252:
1.3 deraadt 253: return(interpret(&pwent, __yplin));
1.1 deraadt 254: }
255:
256: struct passwd *
1.16 deraadt 257: ypgetpwuid(uid_t uid)
1.1 deraadt 258: {
259: static struct passwd pwent;
260: int reason, vallen;
1.16 deraadt 261: char namebuf[16], *val;
262:
1.1 deraadt 263: if (!domain && (reason = yp_get_default_domain(&domain))) {
264: fprintf(stderr, "%s: can't get local YP domain. Reason: %s\n",
1.9 millert 265: __progname, yperr_string(reason));
1.1 deraadt 266: exit(1);
267: }
268:
1.16 deraadt 269: snprintf(namebuf, sizeof namebuf, "%u", (u_int)uid);
1.1 deraadt 270: reason = yp_match(domain, "passwd.byuid", namebuf, strlen(namebuf),
271: &val, &vallen);
272: switch(reason) {
273: case 0:
274: break;
275: default:
276: return (NULL);
277: break;
278: }
279: val[vallen] = '\0';
1.3 deraadt 280: if (__yplin)
281: free(__yplin);
1.11 alex 282: if (!(__yplin = (char *)malloc(vallen + 1)))
283: err(1, NULL);
1.16 deraadt 284: strlcpy(__yplin, val, vallen + 1);
1.1 deraadt 285: free(val);
286:
1.3 deraadt 287: return(interpret(&pwent, __yplin));
1.1 deraadt 288: }
289:
290: #endif /* YP */
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