Annotation of src/usr.bin/passwd/local_passwd.c, Revision 1.12
1.12 ! millert 1: /* $OpenBSD: local_passwd.c,v 1.11 2000/08/01 22:27:51 provos Exp $ */
1.3 deraadt 2:
1.1 deraadt 3: /*-
4: * Copyright (c) 1990 The Regents of the University of California.
5: * All rights reserved.
6: *
7: * Redistribution and use in source and binary forms, with or without
8: * modification, are permitted provided that the following conditions
9: * are met:
10: * 1. Redistributions of source code must retain the above copyright
11: * notice, this list of conditions and the following disclaimer.
12: * 2. Redistributions in binary form must reproduce the above copyright
13: * notice, this list of conditions and the following disclaimer in the
14: * documentation and/or other materials provided with the distribution.
15: * 3. All advertising materials mentioning features or use of this software
16: * must display the following acknowledgement:
17: * This product includes software developed by the University of
18: * California, Berkeley and its contributors.
19: * 4. Neither the name of the University nor the names of its contributors
20: * may be used to endorse or promote products derived from this software
21: * without specific prior written permission.
22: *
23: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33: * SUCH DAMAGE.
34: */
35:
36: #ifndef lint
37: /*static char sccsid[] = "from: @(#)local_passwd.c 5.5 (Berkeley) 5/6/91";*/
1.12 ! millert 38: static char rcsid[] = "$OpenBSD: local_passwd.c,v 1.11 2000/08/01 22:27:51 provos Exp $";
1.1 deraadt 39: #endif /* not lint */
40:
41: #include <sys/types.h>
1.2 deraadt 42: #include <sys/stat.h>
1.1 deraadt 43: #include <pwd.h>
1.7 weingart 44: #include <err.h>
1.1 deraadt 45: #include <errno.h>
46: #include <stdio.h>
47: #include <string.h>
1.2 deraadt 48: #include <unistd.h>
1.7 weingart 49: #include <ctype.h>
1.2 deraadt 50: #include <fcntl.h>
51: #include <util.h>
1.1 deraadt 52:
1.7 weingart 53: static uid_t uid;
1.11 provos 54: extern int pwd_gensalt __P(( char *, int, struct passwd *, char));
55: extern int pwd_check __P((struct passwd *, char *));
56: extern int pwd_gettries __P((struct passwd *));
1.1 deraadt 57:
1.7 weingart 58: int
1.1 deraadt 59: local_passwd(uname)
60: char *uname;
61: {
62: struct passwd *pw;
63: int pfd, tfd;
64: char *getnewpasswd();
65:
66: if (!(pw = getpwnam(uname))) {
67: #ifdef YP
68: extern int use_yp;
69: if (!use_yp)
70: #endif
1.7 weingart 71: warnx("unknown user %s.", uname);
1.1 deraadt 72: return(1);
73: }
74:
75: uid = getuid();
76: if (uid && uid != pw->pw_uid) {
1.8 millert 77: warnx("login/uid mismatch, username argument required.");
1.1 deraadt 78: return(1);
79: }
80:
81: pw_init();
1.2 deraadt 82: tfd = pw_lock(0);
1.4 millert 83: if (tfd < 0) {
84: if (errno == EEXIST)
85: errx(1, "the passwd file is busy.");
86: else
87: err(1, "can't open passwd temp file");
88: }
1.2 deraadt 89: pfd = open(_PATH_MASTERPASSWD, O_RDONLY, 0);
1.11 provos 90: if (pfd < 0 || fcntl(pfd, F_SETFD, 1) == -1)
1.2 deraadt 91: pw_error(_PATH_MASTERPASSWD, 1, 1);
1.1 deraadt 92:
93: /*
94: * Get the new password. Reset passwd change time to zero; when
95: * classes are implemented, go and get the "offset" value for this
96: * class and reset the timer.
97: */
98: pw->pw_passwd = getnewpasswd(pw);
99: pw->pw_change = 0;
100: pw_copy(pfd, tfd, pw);
101:
1.12 ! millert 102: if (pw_mkdb(uname) < 0)
1.1 deraadt 103: pw_error((char *)NULL, 0, 1);
104: return(0);
105: }
106:
107: char *
108: getnewpasswd(pw)
109: register struct passwd *pw;
110: {
111: register char *p, *t;
1.11 provos 112: int tries, pwd_tries;
1.5 provos 113: char buf[_PASSWORD_LEN+1], salt[_PASSWORD_LEN], *crypt(), *getpass();
1.1 deraadt 114:
115: (void)printf("Changing local password for %s.\n", pw->pw_name);
116:
117: if (uid && pw->pw_passwd[0] &&
118: strcmp(crypt(getpass("Old password:"), pw->pw_passwd),
119: pw->pw_passwd)) {
120: errno = EACCES;
121: pw_error(NULL, 1, 1);
122: }
1.11 provos 123:
124: pwd_tries = pwd_gettries(pw);
1.1 deraadt 125:
126: for (buf[0] = '\0', tries = 0;;) {
127: p = getpass("New password:");
128: if (!*p) {
129: (void)printf("Password unchanged.\n");
130: pw_error(NULL, 0, 0);
1.9 deraadt 131: }
132: if (strcmp(p, "s/key") == 0) {
133: printf("That password collides with a system feature. Choose another.\n");
134: continue;
1.1 deraadt 135: }
1.11 provos 136:
137: if ((tries++ < pwd_tries || pwd_tries == 0)
138: && pwd_check(pw, p) == 0)
1.1 deraadt 139: continue;
1.10 deraadt 140: strncpy(buf, p, sizeof buf-1);
141: buf[sizeof buf-1] = '\0';
1.1 deraadt 142: if (!strcmp(buf, getpass("Retype new password:")))
143: break;
144: (void)printf("Mismatch; try again, EOF to quit.\n");
145: }
1.6 provos 146: if( !pwd_gensalt( salt, _PASSWORD_LEN, pw, 'l' )) {
147: (void)printf("Couldn't generate salt.\n");
148: pw_error(NULL, 0, 0);
149: }
1.1 deraadt 150: return(crypt(buf, salt));
151: }
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