[unix-history] / usr / src / usr.sbin / pwd_mkdb / pwd_mkdb.c

/*-
 * Copyright (c) 1991 The Regents of the University of California.
 * All rights reserved.
 *
 * %sccs.include.redist.c%
 */

#ifndef lint
char copyright[] =
"@(#) Copyright (c) 1991 The Regents of the University of California.\n\
 All rights reserved.\n";
#endif /* not lint */

#ifndef lint
static char sccsid[] = "@(#)pwd_mkdb.c	5.5 (Berkeley) %G%";
#endif /* not lint */

#include <sys/param.h>
#include <sys/stat.h>
#include <signal.h>
#include <fcntl.h>
#include <db.h>
#include <pwd.h>
#include <errno.h>
#include <limits.h>
#include <stdio.h>
#include <string.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)

char *progname = "pwd_mkdb";

static enum state { FILE_INSECURE, FILE_SECURE, FILE_ORIG } clean;
static struct passwd pwd;			/* password structure */
static char *pname;				/* password file name */

main(argc, argv)
	int argc;
	char **argv;
{
	extern int optind;
	register int len, makeold;
	register char *p, *t;
	FILE *fp, *oldfp;
	DB *dp, *edp;
	sigset_t set;
	DBT data, key;
	int ch, cnt, tfd;
	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 done 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);

	pname = *argv;
	/* Open the original password file */
	if (!(fp = fopen(pname, "r")))
		error(pname);

	/* Open the temporary insecure password database. */
	(void)sprintf(buf, "%s.tmp", _PATH_MP_DB);
	dp = hash_open(buf, O_WRONLY|O_CREAT|O_EXCL, PERM_INSECURE, NULL);
	if (!dp)
		error(buf);
	clean = FILE_INSECURE;

	/* Open the temporary encrypted password database. */
	(void)sprintf(buf, "%s.tmp", _PATH_SMP_DB);
	edp = hash_open(buf, O_WRONLY|O_CREAT|O_EXCL, PERM_SECURE, NULL);
	if (!edp)
		error(buf);
	clean = FILE_SECURE;

	/*
	 * 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.  Don't really care who reads it.
	 */
	if (makeold) {
		(void)sprintf(buf, "%s.orig", pname);
		if ((tfd = open(buf,
		    O_WRONLY|O_CREAT|O_EXCL, PERM_INSECURE)) < 0)
			error(buf);
		if (!(oldfp = fdopen(tfd, "w")))
			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("*");
		bcopy((char *)&pwd.pw_uid, p, sizeof(int));
		p += sizeof(int);
		bcopy((char *)&pwd.pw_gid, p, sizeof(int));
		p += sizeof(int);
		bcopy((char *)&pwd.pw_change, p, sizeof(time_t));
		p += sizeof(time_t);
		COMPACT(pwd.pw_class);
		COMPACT(pwd.pw_gecos);
		COMPACT(pwd.pw_dir);
		COMPACT(pwd.pw_shell);
		bcopy((char *)&pwd.pw_expire, p, sizeof(time_t));
		p += sizeof(time_t);
		data.size = p - buf;

		/* Store insecure by name. */
		tbuf[0] = _PW_KEYBYNAME;
		len = strlen(pwd.pw_name);
		bcopy(pwd.pw_name, tbuf + 1, len);
		key.size = len + 1;
		if ((dp->put)(dp, &key, &data, R_NOOVERWRITE) == -1)
			error("put");

		/* Store insecure by number. */
		tbuf[0] = _PW_KEYBYNUM;
		bcopy((char *)&cnt, tbuf + 1, 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;
		bcopy((char *)&pwd.pw_uid, tbuf + 1, sizeof(pwd.pw_uid));
		key.size = sizeof(pwd.pw_uid) + 1;
		if ((dp->put)(dp, &key, &data, R_NOOVERWRITE) == -1)
			error("put");

		/* Create secure data. */
		p = buf;
		COMPACT(pwd.pw_name);
		COMPACT(pwd.pw_passwd);
		bcopy((char *)&pwd.pw_uid, p, sizeof(int));
		p += sizeof(int);
		bcopy((char *)&pwd.pw_gid, p, sizeof(int));
		p += sizeof(int);
		bcopy((char *)&pwd.pw_change, p, sizeof(time_t));
		p += sizeof(time_t);
		COMPACT(pwd.pw_class);
		COMPACT(pwd.pw_gecos);
		COMPACT(pwd.pw_dir);
		COMPACT(pwd.pw_shell);
		bcopy((char *)&pwd.pw_expire, p, sizeof(time_t));
		p += sizeof(time_t);
		data.size = p - buf;

		/* Store secure by name. */
		tbuf[0] = _PW_KEYBYNAME;
		len = strlen(pwd.pw_name);
		bcopy(pwd.pw_name, tbuf + 1, len);
		key.size = len + 1;
		if ((dp->put)(edp, &key, &data, R_NOOVERWRITE) == -1)
			error("put");

		/* Store secure by number. */
		tbuf[0] = _PW_KEYBYNUM;
		bcopy((char *)&cnt, tbuf + 1, 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;
		bcopy((char *)&pwd.pw_uid, tbuf + 1, sizeof(pwd.pw_uid));
		key.size = sizeof(pwd.pw_uid) + 1;
		if ((dp->put)(edp, &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);
	(void)(edp->close)(edp);
	if (makeold) {
		(void)fsync(oldfp);
		(void)fclose(oldfp);
	}

	/* 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)sprintf(buf, "%s.tmp", _PATH_MP_DB);
	mv(buf, _PATH_MP_DB);
	(void)sprintf(buf, "%s.tmp", _PATH_SMP_DB);
	mv(buf, _PATH_SMP_DB);
	if (makeold) {
		(void)sprintf(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);
}

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 = index(line, '\n'))) {
		(void)fprintf(stderr, "pwd_mkdb: line too long\n");
		goto fmt;

	}
	*p = '\0';
	if (!pw_scan(line, pw)) {
		(void)fprintf(stderr, "pwd_mkdb: at line #%d.\n", lcnt);
fmt:		errno = EFTYPE;
		error(pname);
		exit(1);
	}
}

mv(from, to)
	char *from, *to;
{
	int sverrno;
	char buf[MAXPATHLEN];

	if (rename(from, to)) {
		sverrno = errno;
		(void)sprintf(buf, "%s to %s", from, to);
		errno = sverrno;
		error(buf);
	}
}

error(name)
	char *name;
{
	(void)fprintf(stderr, "pwd_mkdb: %s: %s\n", name, strerror(errno));
	cleanup();
	exit(1);
}

cleanup()
{
	char buf[MAXPATHLEN];

	switch(clean) {
	case FILE_ORIG:
		(void)sprintf(buf, "%s.orig", pname);
		(void)unlink(buf);
		/* FALLTHROUGH */
	case FILE_SECURE:
		(void)sprintf(buf, "%s.tmp", _PATH_SMP_DB);
		(void)unlink(buf);
		/* FALLTHROUGH */
	case FILE_INSECURE:
		(void)sprintf(buf, "%s.tmp", _PATH_MP_DB);
		(void)unlink(buf);
	}
}

usage()
{
	(void)fprintf(stderr, "usage: pwd_mkdb [-p] file\n");
	exit(1);
}
Commit	Line	Data
6257c216 KB	1	/*-
	2	* Copyright (c) 1991 The Regents of the University of California.
	3	* All rights reserved.
	4	*
	5	* %sccs.include.redist.c%
	6	*/
	7
	8	#ifndef lint
	9	char copyright[] =
	10	"@(#) Copyright (c) 1991 The Regents of the University of California.\n\
	11	All rights reserved.\n";
	12	#endif /* not lint */
	13
	14	#ifndef lint
32d4d55f	15	static char sccsid[] = "@(#)pwd_mkdb.c 5.5 (Berkeley) %G%";
6257c216 KB	16	#endif /* not lint */
	17
	18	#include <sys/param.h>
	19	#include <sys/stat.h>
	20	#include <signal.h>
	21	#include <fcntl.h>
c557c546	22	#include <db.h>
6257c216 KB	23	#include <pwd.h>
	24	#include <errno.h>
	25	#include <limits.h>
	26	#include <stdio.h>
	27	#include <string.h>
	28
	29	#define INSECURE 1
	30	#define SECURE 2
	31	#define PERM_INSECURE (S_IRUSR\|S_IWUSR\|S_IRGRP\|S_IROTH)
	32	#define PERM_SECURE (S_IRUSR\|S_IWUSR)
	33
	34	char *progname = "pwd_mkdb";
	35
	36	static enum state { FILE_INSECURE, FILE_SECURE, FILE_ORIG } clean;
	37	static struct passwd pwd; /* password structure */
	38	static char pname; / password file name */
	39
	40	main(argc, argv)
	41	int argc;
	42	char **argv;
	43	{
	44	extern int optind;
	45	register int len, makeold;
	46	register char p, t;
	47	FILE fp, oldfp;
c557c546	48	DB dp, edp;
6257c216	49	sigset_t set;
c557c546	50	DBT data, key;
6257c216 KB	51	int ch, cnt, tfd;
	52	char buf[MAX(MAXPATHLEN, LINE_MAX * 2)], tbuf[1024];
	53
	54	makeold = 0;
	55	while ((ch = getopt(argc, argv, "pv")) != EOF)
	56	switch(ch) {
	57	case 'p': /* create V7 "file.orig" */
	58	makeold = 1;
	59	break;
	60	case 'v': /* backward compatible */
	61	break;
	62	case '?':
	63	default:
	64	usage();
	65	}
	66	argc -= optind;
	67	argv += optind;
	68
	69	if (argc != 1)
	70	usage();
	71
	72	/*
	73	* This could be done to allow the user to interrupt. Probably
	74	* not worth the effort.
	75	*/
	76	sigemptyset(&set);
	77	sigaddset(&set, SIGTSTP);
	78	sigaddset(&set, SIGHUP);
	79	sigaddset(&set, SIGINT);
	80	sigaddset(&set, SIGQUIT);
	81	sigaddset(&set, SIGTERM);
	82	(void)sigprocmask(SIG_BLOCK, &set, (sigset_t *)NULL);
	83
	84	pname = *argv;
	85	/* Open the original password file */
	86	if (!(fp = fopen(pname, "r")))
	87	error(pname);
	88
c557c546	89	/* Open the temporary insecure password database. */
6257c216	90	(void)sprintf(buf, "%s.tmp", _PATH_MP_DB);
c557c546 KB	91	dp = hash_open(buf, O_WRONLY\|O_CREAT\|O_EXCL, PERM_INSECURE, NULL);
c557c546 KB	92	if (!dp)
6257c216 KB	93	error(buf);
	94	clean = FILE_INSECURE;
	95
c557c546	96	/* Open the temporary encrypted password database. */
6257c216	97	(void)sprintf(buf, "%s.tmp", _PATH_SMP_DB);
c557c546 KB	98	edp = hash_open(buf, O_WRONLY\|O_CREAT\|O_EXCL, PERM_SECURE, NULL);
c557c546 KB	99	if (!edp)
6257c216 KB	100	error(buf);
	101	clean = FILE_SECURE;
	102
	103	/*
	104	* Open file for old password file. Minor trickiness -- don't want to
	105	* chance the file already existing, since someone (stupidly) might
	106	* still be using this for permission checking. So, open it first and
	107	* fdopen the resulting fd. Don't really care who reads it.
	108	*/
	109	if (makeold) {
	110	(void)sprintf(buf, "%s.orig", pname);
	111	if ((tfd = open(buf,
	112	O_WRONLY\|O_CREAT\|O_EXCL, PERM_INSECURE)) < 0)
	113	error(buf);
	114	if (!(oldfp = fdopen(tfd, "w")))
	115	error(buf);
	116	clean = FILE_ORIG;
	117	}
	118
32d4d55f KB	119	/*
	120	* The databases actually contain three copies of the original data.
	121	* Each password file entry is converted into a rough approximation
	122	* of a ``struct passwd'', with the strings placed inline. This
	123	* object is then stored as the data for three separate keys. The
	124	* first key * is the pw_name field prepended by the _PW_KEYBYNAME
	125	* character. The second key is the pw_uid field prepended by the
	126	* _PW_KEYBYUID character. The third key is the line number in the
	127	* original file prepended by the _PW_KEYBYNUM character. (The special
	128	* characters are prepended to ensure that the keys do not collide.)
	129	*/
c557c546 KB	130	data.data = (u_char *)buf;
c557c546 KB	131	key.data = (u_char *)tbuf;
6257c216 KB	132	for (cnt = 1; scan(fp, &pwd); ++cnt) {
	133	#define COMPACT(e) t = e; while (p++ = t++);
	134	/* Create insecure data. */
	135	p = buf;
	136	COMPACT(pwd.pw_name);
	137	COMPACT("*");
	138	bcopy((char *)&pwd.pw_uid, p, sizeof(int));
	139	p += sizeof(int);
	140	bcopy((char *)&pwd.pw_gid, p, sizeof(int));
	141	p += sizeof(int);
	142	bcopy((char *)&pwd.pw_change, p, sizeof(time_t));
	143	p += sizeof(time_t);
	144	COMPACT(pwd.pw_class);
	145	COMPACT(pwd.pw_gecos);
	146	COMPACT(pwd.pw_dir);
	147	COMPACT(pwd.pw_shell);
	148	bcopy((char *)&pwd.pw_expire, p, sizeof(time_t));
	149	p += sizeof(time_t);
c557c546	150	data.size = p - buf;
6257c216 KB	151
	152	/* Store insecure by name. */
	153	tbuf[0] = _PW_KEYBYNAME;
	154	len = strlen(pwd.pw_name);
	155	bcopy(pwd.pw_name, tbuf + 1, len);
c557c546 KB	156	key.size = len + 1;
	157	if ((dp->put)(dp, &key, &data, R_NOOVERWRITE) == -1)
	158	error("put");
6257c216 KB	159
	160	/* Store insecure by number. */
	161	tbuf[0] = _PW_KEYBYNUM;
	162	bcopy((char *)&cnt, tbuf + 1, sizeof(cnt));
c557c546 KB	163	key.size = sizeof(cnt) + 1;
	164	if ((dp->put)(dp, &key, &data, R_NOOVERWRITE) == -1)
	165	error("put");
6257c216 KB	166
	167	/* Store insecure by uid. */
	168	tbuf[0] = _PW_KEYBYUID;
	169	bcopy((char *)&pwd.pw_uid, tbuf + 1, sizeof(pwd.pw_uid));
c557c546 KB	170	key.size = sizeof(pwd.pw_uid) + 1;
	171	if ((dp->put)(dp, &key, &data, R_NOOVERWRITE) == -1)
	172	error("put");
6257c216 KB	173
	174	/* Create secure data. */
	175	p = buf;
	176	COMPACT(pwd.pw_name);
	177	COMPACT(pwd.pw_passwd);
	178	bcopy((char *)&pwd.pw_uid, p, sizeof(int));
	179	p += sizeof(int);
	180	bcopy((char *)&pwd.pw_gid, p, sizeof(int));
	181	p += sizeof(int);
	182	bcopy((char *)&pwd.pw_change, p, sizeof(time_t));
	183	p += sizeof(time_t);
	184	COMPACT(pwd.pw_class);
	185	COMPACT(pwd.pw_gecos);
	186	COMPACT(pwd.pw_dir);
	187	COMPACT(pwd.pw_shell);
	188	bcopy((char *)&pwd.pw_expire, p, sizeof(time_t));
	189	p += sizeof(time_t);
c557c546	190	data.size = p - buf;
6257c216 KB	191
	192	/* Store secure by name. */
	193	tbuf[0] = _PW_KEYBYNAME;
	194	len = strlen(pwd.pw_name);
	195	bcopy(pwd.pw_name, tbuf + 1, len);
c557c546 KB	196	key.size = len + 1;
	197	if ((dp->put)(edp, &key, &data, R_NOOVERWRITE) == -1)
	198	error("put");
6257c216 KB	199
	200	/* Store secure by number. */
	201	tbuf[0] = _PW_KEYBYNUM;
	202	bcopy((char *)&cnt, tbuf + 1, sizeof(cnt));
c557c546 KB	203	key.size = sizeof(cnt) + 1;
	204	if ((dp->put)(edp, &key, &data, R_NOOVERWRITE) == -1)
	205	error("put");
6257c216 KB	206
	207	/* Store secure by uid. */
	208	tbuf[0] = _PW_KEYBYUID;
	209	bcopy((char *)&pwd.pw_uid, tbuf + 1, sizeof(pwd.pw_uid));
c557c546 KB	210	key.size = sizeof(pwd.pw_uid) + 1;
	211	if ((dp->put)(edp, &key, &data, R_NOOVERWRITE) == -1)
	212	error("put");
6257c216 KB	213
	214	/* Create original format password file entry */
	215	if (makeold)
	216	(void)fprintf(oldfp, "%s:*:%d:%d:%s:%s:%s\n",
	217	pwd.pw_name, pwd.pw_uid, pwd.pw_gid, pwd.pw_gecos,
	218	pwd.pw_dir, pwd.pw_shell);
	219	}
c557c546 KB	220	(void)(dp->close)(dp);
	221	(void)(edp->close)(edp);
	222	if (makeold) {
	223	(void)fsync(oldfp);
6257c216	224	(void)fclose(oldfp);
c557c546	225	}
6257c216 KB	226
6257c216 KB	227	/* Set master.passwd permissions, in case caller forgot. */
506c5020	228	(void)fchmod(fileno(fp), S_IRUSR\|S_IWUSR);
6257c216 KB	229	(void)fclose(fp);
	230
	231	/* Install as the real password files. */
c557c546	232	(void)sprintf(buf, "%s.tmp", _PATH_MP_DB);
6257c216	233	mv(buf, _PATH_MP_DB);
c557c546	234	(void)sprintf(buf, "%s.tmp", _PATH_SMP_DB);
6257c216 KB	235	mv(buf, _PATH_SMP_DB);
	236	if (makeold) {
	237	(void)sprintf(buf, "%s.orig", pname);
	238	mv(buf, _PATH_PASSWD);
	239	}
	240	/*
	241	* Move the master password LAST -- chpass(1), passwd(1) and vipw(8)
	242	* all use flock(2) on it to block other incarnations of themselves.
	243	* The rename means that everything is unlocked, as the original file
	244	* can no longer be accessed.
	245	*/
	246	mv(pname, _PATH_MASTERPASSWD);
	247	exit(0);
	248	}
	249
	250	scan(fp, pw)
	251	FILE *fp;
	252	struct passwd *pw;
	253	{
	254	static int lcnt;
	255	static char line[LINE_MAX];
	256	char *p;
	257
	258	if (!fgets(line, sizeof(line), fp))
	259	return(0);
	260	++lcnt;
	261	/*
	262	* ``... if I swallow anything evil, put your fingers down my
	263	* throat...''
	264	* -- The Who
	265	*/
	266	if (!(p = index(line, '\n'))) {
	267	(void)fprintf(stderr, "pwd_mkdb: line too long\n");
	268	goto fmt;
	269
	270	}
	271	*p = '\0';
	272	if (!pw_scan(line, pw)) {
	273	(void)fprintf(stderr, "pwd_mkdb: at line #%d.\n", lcnt);
	274	fmt: errno = EFTYPE;
	275	error(pname);
	276	exit(1);
	277	}
	278	}
	279
	280	mv(from, to)
	281	char from, to;
	282	{
	283	int sverrno;
	284	char buf[MAXPATHLEN];
	285
	286	if (rename(from, to)) {
	287	sverrno = errno;
	288	(void)sprintf(buf, "%s to %s", from, to);
	289	errno = sverrno;
	290	error(buf);
	291	}
	292	}
	293
c557c546 KB	294	error(name)
	295	char *name;
	296	{
	297	(void)fprintf(stderr, "pwd_mkdb: %s: %s\n", name, strerror(errno));
	298	cleanup();
	299	exit(1);
	300	}
	301
6257c216 KB	302	cleanup()
	303	{
	304	char buf[MAXPATHLEN];
	305
	306	switch(clean) {
	307	case FILE_ORIG:
	308	(void)sprintf(buf, "%s.orig", pname);
	309	(void)unlink(buf);
	310	/* FALLTHROUGH */
	311	case FILE_SECURE:
	312	(void)sprintf(buf, "%s.tmp", _PATH_SMP_DB);
	313	(void)unlink(buf);
	314	/* FALLTHROUGH */
	315	case FILE_INSECURE:
	316	(void)sprintf(buf, "%s.tmp", _PATH_MP_DB);
	317	(void)unlink(buf);
	318	}
	319	}
	320
6257c216 KB	321	usage()
	322	{
	323	(void)fprintf(stderr, "usage: pwd_mkdb [-p] file\n");
	324	exit(1);
	325	}