BSD 4.4 Lite usr.sbin Sources

1 files changed, 387 insertions, 0 deletions

diff --git a/usr.sbin/pwd_mkdb/pwd_mkdb.c b/usr.sbin/pwd_mkdb/pwd_mkdb.c
new file mode 100644
index 0000000..7ccc91f
--- /dev/null
+++ b/usr.sbin/pwd_mkdb/pwd_mkdb.c
@@ -0,0 +1,387 @@
+/*-
+ * Copyright (c) 1991, 1993, 1994
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef lint
+static char copyright[] =
+"@(#) Copyright (c) 1991, 1993, 1994\n\
+	The Regents of the University of California.  All rights reserved.\n";
+#endif /* not lint */
+
+#ifndef lint
+static char sccsid[] = "@(#)pwd_mkdb.c	8.5 (Berkeley) 4/20/94";
+#endif /* not lint */
+
+#include <sys/param.h>
+#include <sys/stat.h>
+
+#include <db.h>
+#include <err.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <limits.h>
+#include <pwd.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "pw_scan.h"
+
+#define	INSECURE	1
+#define	SECURE		2
+#define	PERM_INSECURE	(S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH)
+#define	PERM_SECURE	(S_IRUSR|S_IWUSR)
+
+HASHINFO openinfo = {
+	4096,		/* bsize */
+	32,		/* ffactor */
+	256,		/* nelem */
+	2048 * 1024,	/* cachesize */
+	NULL,		/* hash() */
+	0		/* lorder */
+};
+
+static enum state { FILE_INSECURE, FILE_SECURE, FILE_ORIG } clean;
+static struct passwd pwd;			/* password structure */
+static char *pname;				/* password file name */
+
+void	cleanup __P((void));
+void	error __P((char *));
+void	mv __P((char *, char *));
+int	scan __P((FILE *, struct passwd *));
+void	usage __P((void));
+
+int
+main(argc, argv)
+	int argc;
+	char *argv[];
+{
+	DB *dp, *edp;
+	DBT data, key;
+	FILE *fp, *oldfp;
+	sigset_t set;
+	int ch, cnt, len, makeold, tfd;
+	char *p, *t;
+	char buf[MAX(MAXPATHLEN, LINE_MAX * 2)], tbuf[1024];
+
+	makeold = 0;
+	while ((ch = getopt(argc, argv, "pv")) != EOF)
+		switch(ch) {
+		case 'p':			/* create V7 "file.orig" */
+			makeold = 1;
+			break;
+		case 'v':			/* backward compatible */
+			break;
+		case '?':
+		default:
+			usage();
+		}
+	argc -= optind;
+	argv += optind;
+
+	if (argc != 1)
+		usage();
+
+	/*
+	 * This could be changed to allow the user to interrupt.
+	 * Probably not worth the effort.
+	 */
+	sigemptyset(&set);
+	sigaddset(&set, SIGTSTP);
+	sigaddset(&set, SIGHUP);
+	sigaddset(&set, SIGINT);
+	sigaddset(&set, SIGQUIT);
+	sigaddset(&set, SIGTERM);
+	(void)sigprocmask(SIG_BLOCK, &set, (sigset_t *)NULL);
+
+	/* We don't care what the user wants. */
+	(void)umask(0);
+
+	pname = *argv;
+	/* Open the original password file */
+	if (!(fp = fopen(pname, "r")))
+		error(pname);
+
+	/* Open the temporary insecure password database. */
+	(void)snprintf(buf, sizeof(buf), "%s.tmp", _PATH_MP_DB);
+	dp = dbopen(buf,
+	    O_RDWR|O_CREAT|O_EXCL, PERM_INSECURE, DB_HASH, &openinfo);
+	if (dp == NULL)
+		error(buf);
+	clean = FILE_INSECURE;
+
+	/*
+	 * Open file for old password file.  Minor trickiness -- don't want to
+	 * chance the file already existing, since someone (stupidly) might
+	 * still be using this for permission checking.  So, open it first and
+	 * fdopen the resulting fd.  The resulting file should be readable by
+	 * everyone.
+	 */
+	if (makeold) {
+		(void)snprintf(buf, sizeof(buf), "%s.orig", pname);
+		if ((tfd = open(buf,
+		    O_WRONLY|O_CREAT|O_EXCL, PERM_INSECURE)) < 0)
+			error(buf);
+		if ((oldfp = fdopen(tfd, "w")) == NULL)
+			error(buf);
+		clean = FILE_ORIG;
+	}
+
+	/*
+	 * The databases actually contain three copies of the original data.
+	 * Each password file entry is converted into a rough approximation
+	 * of a ``struct passwd'', with the strings placed inline.  This
+	 * object is then stored as the data for three separate keys.  The
+	 * first key * is the pw_name field prepended by the _PW_KEYBYNAME
+	 * character.  The second key is the pw_uid field prepended by the
+	 * _PW_KEYBYUID character.  The third key is the line number in the
+	 * original file prepended by the _PW_KEYBYNUM character.  (The special
+	 * characters are prepended to ensure that the keys do not collide.)
+	 */
+	data.data = (u_char *)buf;
+	key.data = (u_char *)tbuf;
+	for (cnt = 1; scan(fp, &pwd); ++cnt) {
+#define	COMPACT(e)	t = e; while (*p++ = *t++);
+		/* Create insecure data. */
+		p = buf;
+		COMPACT(pwd.pw_name);
+		COMPACT("*");
+		memmove(p, &pwd.pw_uid, sizeof(int));
+		p += sizeof(int);
+		memmove(p, &pwd.pw_gid, sizeof(int));
+		p += sizeof(int);
+		memmove(p, &pwd.pw_change, sizeof(time_t));
+		p += sizeof(time_t);
+		COMPACT(pwd.pw_class);
+		COMPACT(pwd.pw_gecos);
+		COMPACT(pwd.pw_dir);
+		COMPACT(pwd.pw_shell);
+		memmove(p, &pwd.pw_expire, sizeof(time_t));
+		p += sizeof(time_t);
+		data.size = p - buf;
+
+		/* Store insecure by name. */
+		tbuf[0] = _PW_KEYBYNAME;
+		len = strlen(pwd.pw_name);
+		memmove(tbuf + 1, pwd.pw_name, len);
+		key.size = len + 1;
+		if ((dp->put)(dp, &key, &data, R_NOOVERWRITE) == -1)
+			error("put");
+
+		/* Store insecure by number. */
+		tbuf[0] = _PW_KEYBYNUM;
+		memmove(tbuf + 1, &cnt, sizeof(cnt));
+		key.size = sizeof(cnt) + 1;
+		if ((dp->put)(dp, &key, &data, R_NOOVERWRITE) == -1)
+			error("put");
+
+		/* Store insecure by uid. */
+		tbuf[0] = _PW_KEYBYUID;
+		memmove(tbuf + 1, &pwd.pw_uid, sizeof(pwd.pw_uid));
+		key.size = sizeof(pwd.pw_uid) + 1;
+		if ((dp->put)(dp, &key, &data, R_NOOVERWRITE) == -1)
+			error("put");
+
+		/* Create original format password file entry */
+		if (makeold)
+			(void)fprintf(oldfp, "%s:*:%d:%d:%s:%s:%s\n",
+			    pwd.pw_name, pwd.pw_uid, pwd.pw_gid, pwd.pw_gecos,
+			    pwd.pw_dir, pwd.pw_shell);
+	}
+	(void)(dp->close)(dp);
+	if (makeold) {
+		(void)fflush(oldfp);
+		(void)fclose(oldfp);
+	}
+
+	/* Open the temporary encrypted password database. */
+	(void)snprintf(buf, sizeof(buf), "%s.tmp", _PATH_SMP_DB);
+	edp = dbopen(buf,
+	    O_RDWR|O_CREAT|O_EXCL, PERM_SECURE, DB_HASH, &openinfo);
+	if (!edp)
+		error(buf);
+	clean = FILE_SECURE;
+
+	rewind(fp);
+	for (cnt = 1; scan(fp, &pwd); ++cnt) {
+
+		/* Create secure data. */
+		p = buf;
+		COMPACT(pwd.pw_name);
+		COMPACT(pwd.pw_passwd);
+		memmove(p, &pwd.pw_uid, sizeof(int));
+		p += sizeof(int);
+		memmove(p, &pwd.pw_gid, sizeof(int));
+		p += sizeof(int);
+		memmove(p, &pwd.pw_change, sizeof(time_t));
+		p += sizeof(time_t);
+		COMPACT(pwd.pw_class);
+		COMPACT(pwd.pw_gecos);
+		COMPACT(pwd.pw_dir);
+		COMPACT(pwd.pw_shell);
+		memmove(p, &pwd.pw_expire, sizeof(time_t));
+		p += sizeof(time_t);
+		data.size = p - buf;
+
+		/* Store secure by name. */
+		tbuf[0] = _PW_KEYBYNAME;
+		len = strlen(pwd.pw_name);
+		memmove(tbuf + 1, pwd.pw_name, len);
+		key.size = len + 1;
+		if ((dp->put)(edp, &key, &data, R_NOOVERWRITE) == -1)
+			error("put");
+
+		/* Store secure by number. */
+		tbuf[0] = _PW_KEYBYNUM;
+		memmove(tbuf + 1, &cnt, sizeof(cnt));
+		key.size = sizeof(cnt) + 1;
+		if ((dp->put)(edp, &key, &data, R_NOOVERWRITE) == -1)
+			error("put");
+
+		/* Store secure by uid. */
+		tbuf[0] = _PW_KEYBYUID;
+		memmove(tbuf + 1, &pwd.pw_uid, sizeof(pwd.pw_uid));
+		key.size = sizeof(pwd.pw_uid) + 1;
+		if ((dp->put)(edp, &key, &data, R_NOOVERWRITE) == -1)
+			error("put");
+	}
+
+	(void)(edp->close)(edp);
+
+	/* Set master.passwd permissions, in case caller forgot. */
+	(void)fchmod(fileno(fp), S_IRUSR|S_IWUSR);
+	(void)fclose(fp);
+
+	/* Install as the real password files. */
+	(void)snprintf(buf, sizeof(buf), "%s.tmp", _PATH_MP_DB);
+	mv(buf, _PATH_MP_DB);
+	(void)snprintf(buf, sizeof(buf), "%s.tmp", _PATH_SMP_DB);
+	mv(buf, _PATH_SMP_DB);
+	if (makeold) {
+		(void)snprintf(buf, sizeof(buf), "%s.orig", pname);
+		mv(buf, _PATH_PASSWD);
+	}
+	/*
+	 * Move the master password LAST -- chpass(1), passwd(1) and vipw(8)
+	 * all use flock(2) on it to block other incarnations of themselves.
+	 * The rename means that everything is unlocked, as the original file
+	 * can no longer be accessed.
+	 */
+	mv(pname, _PATH_MASTERPASSWD);
+	exit(0);
+}
+
+int
+scan(fp, pw)
+	FILE *fp;
+	struct passwd *pw;
+{
+	static int lcnt;
+	static char line[LINE_MAX];
+	char *p;
+
+	if (!fgets(line, sizeof(line), fp))
+		return (0);
+	++lcnt;
+	/*
+	 * ``... if I swallow anything evil, put your fingers down my
+	 * throat...''
+	 *	-- The Who
+	 */
+	if (!(p = strchr(line, '\n'))) {
+		warnx("line too long");
+		goto fmt;
+
+	}
+	*p = '\0';
+	if (!pw_scan(line, pw)) {
+		warnx("at line #%d", lcnt);
+fmt:		errno = EFTYPE;	/* XXX */
+		error(pname);
+	}
+
+	return (1);
+}
+
+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.tmp", _PATH_SMP_DB);
+		(void)unlink(buf);
+		/* FALLTHROUGH */
+	case FILE_INSECURE:
+		(void)snprintf(buf, sizeof(buf), "%s.tmp", _PATH_MP_DB);
+		(void)unlink(buf);
+	}
+}
+
+void
+usage()
+{
+
+	(void)fprintf(stderr, "usage: pwd_mkdb [-p] file\n");
+	exit(1);
+}