Annotation of src/usr.bin/passwd/local_passwd.c, Revision 1.14
1.14 ! millert 1: /* $OpenBSD: local_passwd.c,v 1.13 2000/12/12 02:19:58 millert 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";*/
1.14 ! millert 38: static char rcsid[] = "$OpenBSD: local_passwd.c,v 1.13 2000/12/12 02:19:58 millert 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>
1.14 ! millert 52: #include <login_cap.h>
1.1 deraadt 53:
1.7 weingart 54: static uid_t uid;
1.14 ! millert 55: extern int pwd_gensalt __P((char *, int, struct passwd *, login_cap_t *, char));
! 56: extern int pwd_check __P((struct passwd *, login_cap_t *, char *));
! 57: extern int pwd_gettries __P((struct passwd *, login_cap_t *));
! 58:
! 59: char *getnewpasswd __P((struct passwd *, login_cap_t *, int));
1.1 deraadt 60:
1.7 weingart 61: int
1.13 millert 62: local_passwd(uname, authenticated)
1.1 deraadt 63: char *uname;
1.13 millert 64: int authenticated;
1.1 deraadt 65: {
66: struct passwd *pw;
1.14 ! millert 67: login_cap_t *lc;
1.1 deraadt 68: int pfd, tfd;
1.14 ! millert 69: time_t period;
1.1 deraadt 70:
71: if (!(pw = getpwnam(uname))) {
72: #ifdef YP
73: extern int use_yp;
74: if (!use_yp)
75: #endif
1.7 weingart 76: warnx("unknown user %s.", uname);
1.1 deraadt 77: return(1);
78: }
1.14 ! millert 79: if ((lc = login_getclass(pw->pw_class)) == NULL) {
! 80: warnx("unable to get login class for user %s.", uname);
! 81: return(1);
! 82: }
1.1 deraadt 83:
1.13 millert 84: uid = authenticated ? pw->pw_uid : getuid();
1.1 deraadt 85: if (uid && uid != pw->pw_uid) {
1.8 millert 86: warnx("login/uid mismatch, username argument required.");
1.1 deraadt 87: return(1);
88: }
89:
90: pw_init();
1.2 deraadt 91: tfd = pw_lock(0);
1.4 millert 92: if (tfd < 0) {
93: if (errno == EEXIST)
94: errx(1, "the passwd file is busy.");
95: else
96: err(1, "can't open passwd temp file");
97: }
1.2 deraadt 98: pfd = open(_PATH_MASTERPASSWD, O_RDONLY, 0);
1.11 provos 99: if (pfd < 0 || fcntl(pfd, F_SETFD, 1) == -1)
1.2 deraadt 100: pw_error(_PATH_MASTERPASSWD, 1, 1);
1.1 deraadt 101:
1.14 ! millert 102: /* Get the new password. */
! 103: pw->pw_passwd = getnewpasswd(pw, lc, authenticated);
! 104:
! 105: /* Reset password change time based on login.conf. */
! 106: period = login_getcaptime(lc, "passwordtime", 0, 0);
! 107: if (period > 0)
! 108: pw->pw_change = time(NULL) + period;
! 109: else
! 110: pw->pw_change = 0;
! 111:
! 112: /* Update master.passwd file and build .db version. */
1.1 deraadt 113: pw_copy(pfd, tfd, pw);
1.12 millert 114: if (pw_mkdb(uname) < 0)
1.1 deraadt 115: pw_error((char *)NULL, 0, 1);
1.14 ! millert 116:
1.1 deraadt 117: return(0);
118: }
119:
120: char *
1.14 ! millert 121: getnewpasswd(pw, lc, authenticated)
! 122: struct passwd *pw;
! 123: login_cap_t *lc;
1.13 millert 124: int authenticated;
1.1 deraadt 125: {
1.13 millert 126: register char *p;
1.11 provos 127: int tries, pwd_tries;
1.13 millert 128: char buf[_PASSWORD_LEN+1], salt[_PASSWORD_LEN];
1.1 deraadt 129:
1.13 millert 130: if (!authenticated) {
131: (void)printf("Changing local password for %s.\n", pw->pw_name);
132: if (uid && pw->pw_passwd[0] &&
133: strcmp(crypt(getpass("Old password:"), pw->pw_passwd),
134: pw->pw_passwd)) {
135: errno = EACCES;
136: pw_error(NULL, 1, 1);
137: }
1.1 deraadt 138: }
1.11 provos 139:
1.14 ! millert 140: pwd_tries = pwd_gettries(pw, lc);
1.1 deraadt 141:
142: for (buf[0] = '\0', tries = 0;;) {
143: p = getpass("New password:");
144: if (!*p) {
145: (void)printf("Password unchanged.\n");
146: pw_error(NULL, 0, 0);
1.9 deraadt 147: }
148: if (strcmp(p, "s/key") == 0) {
149: printf("That password collides with a system feature. Choose another.\n");
150: continue;
1.1 deraadt 151: }
1.11 provos 152:
153: if ((tries++ < pwd_tries || pwd_tries == 0)
1.14 ! millert 154: && pwd_check(pw, lc, p) == 0)
1.1 deraadt 155: continue;
1.13 millert 156: strlcpy(buf, p, sizeof(buf));
1.1 deraadt 157: if (!strcmp(buf, getpass("Retype new password:")))
158: break;
159: (void)printf("Mismatch; try again, EOF to quit.\n");
160: }
1.14 ! millert 161: if (!pwd_gensalt(salt, _PASSWORD_LEN, pw, lc, 'l')) {
1.6 provos 162: (void)printf("Couldn't generate salt.\n");
163: pw_error(NULL, 0, 0);
164: }
1.1 deraadt 165: return(crypt(buf, salt));
166: }
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