1724847d45
Change things slightly so this message says "local" or "YP" as needed so we can use it for both NIS and local password changes without confusing people.
163 lines
4.5 KiB
C
163 lines
4.5 KiB
C
/*-
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* Copyright (c) 1990, 1993, 1994
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* The Regents of the University of California. 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[] = "@(#)local_passwd.c 8.3 (Berkeley) 4/2/94";
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#endif /* not lint */
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#include <sys/types.h>
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#include <sys/time.h>
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#include <ctype.h>
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#include <err.h>
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#include <errno.h>
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#include <pwd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <time.h>
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#include <unistd.h>
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#include <pw_copy.h>
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#include <pw_util.h>
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#include "extern.h"
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static uid_t uid;
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char *tempname;
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static unsigned char itoa64[] = /* 0 ... 63 => ascii - 64 */
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"./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
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void
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to64(s, v, n)
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char *s;
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long v;
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int n;
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{
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while (--n >= 0) {
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*s++ = itoa64[v&0x3f];
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v >>= 6;
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}
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}
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char *
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getnewpasswd(pw, nis)
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struct passwd *pw;
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int nis;
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{
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int tries;
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char *p, *t;
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char buf[_PASSWORD_LEN+1], salt[9];
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struct timeval tv;
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(void)printf("Changing %s password for %s.\n", pw->pw_name,
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nis ? "YP" : "local");
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if (uid && pw->pw_passwd[0] &&
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strcmp(crypt(getpass("Old password:"), pw->pw_passwd),
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pw->pw_passwd)) {
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errno = EACCES;
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pw_error(NULL, 1, 1);
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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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/* Make a good size salt for algoritms that can use it. */
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to64(&salt[0], random(), 3);
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gettimeofday(&tv,0);
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to64(&salt[3], tv.tv_usec, 3);
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to64(&salt[6], tv.tv_sec, 2);
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salt[8] = '\0';
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#endif
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return (crypt(buf, salt));
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}
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int
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local_passwd(uname)
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char *uname;
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{
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struct passwd *pw;
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int pfd, tfd;
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if (!(pw = getpwnam(uname)))
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errx(1, "unknown user %s", uname);
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uid = getuid();
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if (uid && uid != pw->pw_uid)
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errx(1, "%s", strerror(EACCES));
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pw_init();
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pfd = pw_lock();
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tfd = pw_tmp();
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/*
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* Get the new password. Reset passwd change time to zero; when
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* classes are implemented, go and get the "offset" value for this
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* class and reset the timer.
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*/
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pw->pw_passwd = getnewpasswd(pw, 0);
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pw->pw_change = 0;
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pw_copy(pfd, tfd, pw);
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if (!pw_mkdb())
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pw_error((char *)NULL, 0, 1);
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return (0);
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}
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