571 lines
15 KiB
C
571 lines
15 KiB
C
/*-
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* Copyright (c) 1991, 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 copyright[] =
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"@(#) Copyright (c) 1991, 1993, 1994\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif /* not lint */
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#ifndef lint
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static char sccsid[] = "@(#)pwd_mkdb.c 8.5 (Berkeley) 4/20/94";
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#endif /* not lint */
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#include <sys/param.h>
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#include <sys/stat.h>
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#include <db.h>
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#include <err.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <limits.h>
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#include <pwd.h>
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#include <signal.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 <unistd.h>
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#include "pw_scan.h"
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#define INSECURE 1
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#define SECURE 2
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#define PERM_INSECURE (S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH)
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#define PERM_SECURE (S_IRUSR|S_IWUSR)
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HASHINFO openinfo = {
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4096, /* bsize */
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32, /* ffactor */
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256, /* nelem */
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2048 * 1024, /* cachesize */
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NULL, /* hash() */
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0 /* lorder */
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};
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static enum state { FILE_INSECURE, FILE_SECURE, FILE_ORIG } clean;
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static struct passwd pwd; /* password structure */
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static char *pname; /* password file name */
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static char prefix[MAXPATHLEN];
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static int Cflag; /* flag for comments */
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static char line[LINE_MAX];
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void cleanup __P((void));
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void error __P((char *));
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void cp __P((char *, char *, mode_t mode));
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void mv __P((char *, char *));
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int scan __P((FILE *, struct passwd *));
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void usage __P((void));
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int
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main(argc, argv)
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int argc;
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char *argv[];
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{
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DB *dp, *sdp, *pw_db;
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DBT data, sdata, key;
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FILE *fp, *oldfp;
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sigset_t set;
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int ch, cnt, ypcnt, len, makeold, tfd, yp_enabled = 0;
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char *p, *t;
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char buf[MAX(MAXPATHLEN, LINE_MAX * 2)], tbuf[1024];
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char sbuf[MAX(MAXPATHLEN, LINE_MAX * 2)];
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char buf2[MAXPATHLEN];
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char sbuf2[MAXPATHLEN];
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char *username;
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u_int method, methoduid;
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int cflag;
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cflag = 0;
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strcpy(prefix, _PATH_PWD);
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makeold = 0;
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username = NULL;
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while ((ch = getopt(argc, argv, "cd:pu:v")) != -1)
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switch(ch) {
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case 'c': /* verify only */
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cflag = 1;
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break;
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case 'd':
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strncpy(prefix, optarg, sizeof prefix - 1);
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break;
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case 'p': /* create V7 "file.orig" */
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makeold = 1;
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break;
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case 'u': /* only update this record */
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username = optarg;
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break;
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case 'v': /* backward compatible */
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break;
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default:
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usage();
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}
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argc -= optind;
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argv += optind;
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if (argc != 1 || (username && (*username == '+' || *username == '-')))
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usage();
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/*
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* This could be changed to allow the user to interrupt.
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* Probably not worth the effort.
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*/
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sigemptyset(&set);
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sigaddset(&set, SIGTSTP);
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sigaddset(&set, SIGHUP);
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sigaddset(&set, SIGINT);
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sigaddset(&set, SIGQUIT);
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sigaddset(&set, SIGTERM);
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(void)sigprocmask(SIG_BLOCK, &set, (sigset_t *)NULL);
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/* We don't care what the user wants. */
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(void)umask(0);
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pname = *argv;
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/* Open the original password file */
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if (!(fp = fopen(pname, "r")))
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error(pname);
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/* check only if password database is valid */
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if (cflag) {
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for (cnt = 1; scan(fp, &pwd); ++cnt);
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exit(0);
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}
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/* Open the temporary insecure password database. */
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(void)snprintf(buf, sizeof(buf), "%s/%s.tmp", prefix, _MP_DB);
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(void)snprintf(sbuf, sizeof(sbuf), "%s/%s.tmp", prefix, _SMP_DB);
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if (username) {
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(void)snprintf(buf2, sizeof(buf2), "%s/%s", prefix, _MP_DB);
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(void)snprintf(sbuf2, sizeof(sbuf2), "%s/%s", prefix, _SMP_DB);
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clean = FILE_INSECURE;
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cp(buf2, buf, PERM_INSECURE);
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dp = dbopen(buf,
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O_RDWR|O_EXCL, PERM_INSECURE, DB_HASH, &openinfo);
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if (dp == NULL)
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error(buf);
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clean = FILE_SECURE;
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cp(sbuf2, sbuf, PERM_SECURE);
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sdp = dbopen(sbuf,
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O_RDWR|O_EXCL, PERM_SECURE, DB_HASH, &openinfo);
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if (sdp == NULL)
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error(sbuf);
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/*
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* Do some trouble to check if we should store this users
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* uid. Don't use getpwnam/getpwuid as that interferes
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* with NIS.
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*/
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pw_db = dbopen(_PATH_MP_DB, O_RDONLY, 0, DB_HASH, NULL);
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if (!pw_db)
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error(_MP_DB);
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buf[0] = _PW_KEYBYNAME;
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len = strlen(username);
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/* Only check that username fits in buffer */
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memmove(buf + 1, username, MIN(len, sizeof(buf) - 1));
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key.data = (u_char *)buf;
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key.size = len + 1;
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if ((pw_db->get)(pw_db, &key, &data, 0) == 0) {
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p = (char *)data.data;
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/* jump over pw_name and pw_passwd, to get to pw_uid */
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while (*p++)
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;
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while (*p++)
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;
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buf[0] = _PW_KEYBYUID;
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memmove(buf + 1, p, sizeof(int));
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key.data = (u_char *)buf;
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key.size = sizeof(int) + 1;
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if ((pw_db->get)(pw_db, &key, &data, 0) == 0) {
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/* First field of data.data holds pw_pwname */
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if (!strcmp(data.data, username))
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methoduid = 0;
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else
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methoduid = R_NOOVERWRITE;
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} else {
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methoduid = R_NOOVERWRITE;
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}
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} else {
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methoduid = R_NOOVERWRITE;
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}
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(void)(pw_db->close)(pw_db);
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method = 0;
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} else {
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dp = dbopen(buf,
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O_RDWR|O_CREAT|O_EXCL, PERM_INSECURE, DB_HASH, &openinfo);
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if (dp == NULL)
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error(buf);
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clean = FILE_INSECURE;
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sdp = dbopen(sbuf,
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O_RDWR|O_CREAT|O_EXCL, PERM_SECURE, DB_HASH, &openinfo);
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if (sdp == NULL)
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error(sbuf);
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clean = FILE_SECURE;
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method = R_NOOVERWRITE;
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methoduid = R_NOOVERWRITE;
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}
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/*
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* Open file for old password file. Minor trickiness -- don't want to
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* chance the file already existing, since someone (stupidly) might
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* still be using this for permission checking. So, open it first and
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* fdopen the resulting fd. The resulting file should be readable by
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* everyone.
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*/
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if (makeold) {
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(void)snprintf(buf, sizeof(buf), "%s.orig", pname);
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if ((tfd = open(buf,
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O_WRONLY|O_CREAT|O_EXCL, PERM_INSECURE)) < 0)
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error(buf);
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if ((oldfp = fdopen(tfd, "w")) == NULL)
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error(buf);
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clean = FILE_ORIG;
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}
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/*
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* The databases actually contain three copies of the original data.
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* Each password file entry is converted into a rough approximation
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* of a ``struct passwd'', with the strings placed inline. This
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* object is then stored as the data for three separate keys. The
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* first key * is the pw_name field prepended by the _PW_KEYBYNAME
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* character. The second key is the pw_uid field prepended by the
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* _PW_KEYBYUID character. The third key is the line number in the
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* original file prepended by the _PW_KEYBYNUM character. (The special
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* characters are prepended to ensure that the keys do not collide.)
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*/
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ypcnt = 1;
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data.data = (u_char *)buf;
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sdata.data = (u_char *)sbuf;
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key.data = (u_char *)tbuf;
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for (cnt = 1; scan(fp, &pwd); ++cnt) {
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if (!Cflag &&
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(pwd.pw_name[0] == '+' || pwd.pw_name[0] == '-'))
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yp_enabled = 1;
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#define COMPACT(e) t = e; while (*p++ = *t++);
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if (!Cflag &&
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(!username || (strcmp(username, pwd.pw_name) == 0))) {
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/* Create insecure data. */
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p = buf;
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COMPACT(pwd.pw_name);
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COMPACT("*");
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memmove(p, &pwd.pw_uid, sizeof(int));
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p += sizeof(int);
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memmove(p, &pwd.pw_gid, sizeof(int));
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p += sizeof(int);
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memmove(p, &pwd.pw_change, sizeof(time_t));
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p += sizeof(time_t);
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COMPACT(pwd.pw_class);
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COMPACT(pwd.pw_gecos);
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COMPACT(pwd.pw_dir);
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COMPACT(pwd.pw_shell);
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memmove(p, &pwd.pw_expire, sizeof(time_t));
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p += sizeof(time_t);
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memmove(p, &pwd.pw_fields, sizeof pwd.pw_fields);
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p += sizeof pwd.pw_fields;
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data.size = p - buf;
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/* Create secure data. */
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p = sbuf;
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COMPACT(pwd.pw_name);
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COMPACT(pwd.pw_passwd);
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memmove(p, &pwd.pw_uid, sizeof(int));
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p += sizeof(int);
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memmove(p, &pwd.pw_gid, sizeof(int));
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p += sizeof(int);
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memmove(p, &pwd.pw_change, sizeof(time_t));
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p += sizeof(time_t);
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COMPACT(pwd.pw_class);
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COMPACT(pwd.pw_gecos);
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COMPACT(pwd.pw_dir);
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COMPACT(pwd.pw_shell);
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memmove(p, &pwd.pw_expire, sizeof(time_t));
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p += sizeof(time_t);
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memmove(p, &pwd.pw_fields, sizeof pwd.pw_fields);
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p += sizeof pwd.pw_fields;
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sdata.size = p - sbuf;
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/* Store insecure by name. */
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tbuf[0] = _PW_KEYBYNAME;
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len = strlen(pwd.pw_name);
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memmove(tbuf + 1, pwd.pw_name, len);
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key.size = len + 1;
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if ((dp->put)(dp, &key, &data, method) == -1)
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error("put");
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/* Store insecure by number. */
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tbuf[0] = _PW_KEYBYNUM;
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memmove(tbuf + 1, &cnt, sizeof(cnt));
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key.size = sizeof(cnt) + 1;
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if ((dp->put)(dp, &key, &data, method) == -1)
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error("put");
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/* Store insecure by uid. */
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tbuf[0] = _PW_KEYBYUID;
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memmove(tbuf + 1, &pwd.pw_uid, sizeof(pwd.pw_uid));
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key.size = sizeof(pwd.pw_uid) + 1;
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if ((dp->put)(dp, &key, &data, methoduid) == -1)
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error("put");
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/* Store secure by name. */
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tbuf[0] = _PW_KEYBYNAME;
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len = strlen(pwd.pw_name);
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memmove(tbuf + 1, pwd.pw_name, len);
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key.size = len + 1;
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if ((sdp->put)(sdp, &key, &sdata, method) == -1)
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error("put");
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/* Store secure by number. */
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tbuf[0] = _PW_KEYBYNUM;
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memmove(tbuf + 1, &cnt, sizeof(cnt));
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key.size = sizeof(cnt) + 1;
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if ((sdp->put)(sdp, &key, &sdata, method) == -1)
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error("put");
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/* Store secure by uid. */
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tbuf[0] = _PW_KEYBYUID;
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memmove(tbuf + 1, &pwd.pw_uid, sizeof(pwd.pw_uid));
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key.size = sizeof(pwd.pw_uid) + 1;
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if ((sdp->put)(sdp, &key, &sdata, methoduid) == -1)
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error("put");
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/* Store insecure and secure special plus and special minus */
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if (pwd.pw_name[0] == '+' || pwd.pw_name[0] == '-') {
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tbuf[0] = _PW_KEYYPBYNUM;
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memmove(tbuf + 1, &ypcnt, sizeof(cnt));
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ypcnt++;
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key.size = sizeof(cnt) + 1;
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if ((dp->put)(dp, &key, &data, method) == -1)
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error("put");
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if ((sdp->put)(sdp, &key, &sdata, method) == -1)
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error("put");
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}
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}
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/* Create original format password file entry */
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if (Cflag && makeold) /* copy comments */
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(void)fprintf(oldfp, "%s\n", line);
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else if (makeold) {
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char uidstr[20];
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char gidstr[20];
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snprintf(uidstr, sizeof(uidstr), "%d", pwd.pw_uid);
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snprintf(gidstr, sizeof(gidstr), "%d", pwd.pw_gid);
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(void)fprintf(oldfp, "%s:*:%s:%s:%s:%s:%s\n",
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pwd.pw_name, pwd.pw_fields & _PWF_UID ? uidstr : "",
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pwd.pw_fields & _PWF_GID ? gidstr : "",
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pwd.pw_gecos, pwd.pw_dir, pwd.pw_shell);
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}
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}
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/* If YP enabled, set flag. */
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if (yp_enabled) {
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buf[0] = yp_enabled + 2;
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data.size = 1;
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tbuf[0] = _PW_KEYYPENABLED;
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key.size = 1;
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if ((dp->put)(dp, &key, &data, method) == -1)
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error("put");
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if ((sdp->put)(sdp, &key, &data, method) == -1)
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error("put");
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}
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(void)(dp->close)(dp);
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(void)(sdp->close)(sdp);
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if (makeold) {
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(void)fflush(oldfp);
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(void)fclose(oldfp);
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}
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/* Set master.passwd permissions, in case caller forgot. */
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(void)fchmod(fileno(fp), S_IRUSR|S_IWUSR);
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(void)fclose(fp);
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/* Install as the real password files. */
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(void)snprintf(buf, sizeof(buf), "%s/%s.tmp", prefix, _MP_DB);
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(void)snprintf(buf2, sizeof(buf2), "%s/%s", prefix, _MP_DB);
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mv(buf, buf2);
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(void)snprintf(buf, sizeof(buf), "%s/%s.tmp", prefix, _SMP_DB);
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(void)snprintf(buf2, sizeof(buf2), "%s/%s", prefix, _SMP_DB);
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mv(buf, buf2);
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if (makeold) {
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(void)snprintf(buf2, sizeof(buf2), "%s/%s", prefix, _PASSWD);
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(void)snprintf(buf, sizeof(buf), "%s.orig", pname);
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mv(buf, buf2);
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}
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/*
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* Move the master password LAST -- chpass(1), passwd(1) and vipw(8)
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* all use flock(2) on it to block other incarnations of themselves.
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* The rename means that everything is unlocked, as the original file
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* can no longer be accessed.
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*/
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(void)snprintf(buf, sizeof(buf), "%s/%s", prefix, _MASTERPASSWD);
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mv(pname, buf);
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exit(0);
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}
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int
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scan(fp, pw)
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FILE *fp;
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struct passwd *pw;
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{
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static int lcnt;
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char *p;
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if (!fgets(line, sizeof(line), fp))
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return (0);
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++lcnt;
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/*
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* ``... if I swallow anything evil, put your fingers down my
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* throat...''
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* -- The Who
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*/
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if (!(p = strchr(line, '\n'))) {
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warnx("line too long");
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goto fmt;
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}
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*p = '\0';
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#ifdef PASSWD_IGNORE_COMMENTS
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/*
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* Ignore comments: ^[ \t]*#
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*/
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for (p = line; *p != '\0'; p++)
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if (*p != ' ' && *p != '\t')
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break;
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if (*p == '#' || *p == '\0') {
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Cflag = 1;
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return(1);
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} else
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Cflag = 0;
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#endif
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|
if (!pw_scan(line, pw)) {
|
|
warnx("at line #%d", lcnt);
|
|
fmt: errno = EFTYPE; /* XXX */
|
|
error(pname);
|
|
}
|
|
|
|
return (1);
|
|
}
|
|
|
|
void
|
|
cp(from, to, mode)
|
|
char *from, *to;
|
|
mode_t mode;
|
|
{
|
|
static char buf[MAXBSIZE];
|
|
int from_fd, rcount, to_fd, wcount;
|
|
|
|
if ((from_fd = open(from, O_RDONLY, 0)) < 0)
|
|
error(from);
|
|
if ((to_fd = open(to, O_WRONLY|O_CREAT|O_EXCL, mode)) < 0)
|
|
error(to);
|
|
while ((rcount = read(from_fd, buf, MAXBSIZE)) > 0) {
|
|
wcount = write(to_fd, buf, rcount);
|
|
if (rcount != wcount || wcount == -1) {
|
|
int sverrno = errno;
|
|
|
|
(void)snprintf(buf, sizeof(buf), "%s to %s", from, to);
|
|
errno = sverrno;
|
|
error(buf);
|
|
}
|
|
}
|
|
if (rcount < 0) {
|
|
int sverrno = errno;
|
|
|
|
(void)snprintf(buf, sizeof(buf), "%s to %s", from, to);
|
|
errno = sverrno;
|
|
error(buf);
|
|
}
|
|
}
|
|
|
|
|
|
void
|
|
mv(from, to)
|
|
char *from, *to;
|
|
{
|
|
char buf[MAXPATHLEN];
|
|
|
|
if (rename(from, to)) {
|
|
int sverrno = errno;
|
|
(void)snprintf(buf, sizeof(buf), "%s to %s", from, to);
|
|
errno = sverrno;
|
|
error(buf);
|
|
}
|
|
}
|
|
|
|
void
|
|
error(name)
|
|
char *name;
|
|
{
|
|
|
|
warn(name);
|
|
cleanup();
|
|
exit(1);
|
|
}
|
|
|
|
void
|
|
cleanup()
|
|
{
|
|
char buf[MAXPATHLEN];
|
|
|
|
switch(clean) {
|
|
case FILE_ORIG:
|
|
(void)snprintf(buf, sizeof(buf), "%s.orig", pname);
|
|
(void)unlink(buf);
|
|
/* FALLTHROUGH */
|
|
case FILE_SECURE:
|
|
(void)snprintf(buf, sizeof(buf), "%s/%s.tmp", prefix, _SMP_DB);
|
|
(void)unlink(buf);
|
|
/* FALLTHROUGH */
|
|
case FILE_INSECURE:
|
|
(void)snprintf(buf, sizeof(buf), "%s/%s.tmp", prefix, _MP_DB);
|
|
(void)unlink(buf);
|
|
}
|
|
}
|
|
|
|
void
|
|
usage()
|
|
{
|
|
|
|
(void)fprintf(stderr, "usage: pwd_mkdb [-c] [-p] [-d <dest dir>] [-u <local username>] file\n");
|
|
exit(1);
|
|
}
|