[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	5.2 (Berkeley) %G%";
#endif /* not lint */

#include <sys/param.h>
#include <sys/stat.h>
#include <signal.h>
#include <fcntl.h>
#include <ndbm.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;
	DBM *dp, *edp;
	sigset_t set;
	datum key, data;
	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 password database. */
	(void)sprintf(buf, "%s.tmp", _PATH_MP_DB);
	if (!(dp = dbm_open(buf, O_WRONLY|O_CREAT|O_EXCL, PERM_INSECURE)))
		error(buf);
	clean = FILE_INSECURE;

	/* Open the encrypted password database. */
	(void)sprintf(buf, "%s.tmp", _PATH_SMP_DB);
	if (!(edp = dbm_open(buf, O_WRONLY|O_CREAT|O_EXCL, PERM_SECURE)))
		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;
	}

	data.dptr = buf;
	key.dptr = 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.dsize = p - buf;

		/* Store insecure by name. */
		tbuf[0] = _PW_KEYBYNAME;
		len = strlen(pwd.pw_name);
		bcopy(pwd.pw_name, tbuf + 1, len);
		key.dsize = len + 1;
		if (dbm_store(dp, key, data, DBM_INSERT) < 0)
			error("dbm file");

		/* Store insecure by number. */
		tbuf[0] = _PW_KEYBYNUM;
		bcopy((char *)&cnt, tbuf + 1, sizeof(cnt));
		key.dsize = sizeof(cnt) + 1;
		if (dbm_store(dp, key, data, DBM_INSERT) < 0)
			error("dbm file");

		/* Store insecure by uid. */
		tbuf[0] = _PW_KEYBYUID;
		bcopy((char *)&pwd.pw_uid, tbuf + 1, sizeof(pwd.pw_uid));
		key.dsize = sizeof(pwd.pw_uid) + 1;
		if (dbm_store(dp, key, data, DBM_INSERT) < 0)
			error("dbm file");

		/* 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.dsize = p - buf;

		/* Store secure by name. */
		tbuf[0] = _PW_KEYBYNAME;
		len = strlen(pwd.pw_name);
		bcopy(pwd.pw_name, tbuf + 1, len);
		key.dsize = len + 1;
		if (dbm_store(edp, key, data, DBM_INSERT) < 0)
			error("dbm file");

		/* Store secure by number. */
		tbuf[0] = _PW_KEYBYNUM;
		bcopy((char *)&cnt, tbuf + 1, sizeof(cnt));
		key.dsize = sizeof(cnt) + 1;
		if (dbm_store(edp, key, data, DBM_INSERT) < 0)
			error("dbm file");

		/* Store secure by uid. */
		tbuf[0] = _PW_KEYBYUID;
		bcopy((char *)&pwd.pw_uid, tbuf + 1, sizeof(pwd.pw_uid));
		key.dsize = sizeof(pwd.pw_uid) + 1;
		if (dbm_store(edp, key, data, DBM_INSERT) < 0)
			error("dbm file");

		/* 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)dbm_close(edp);
	(void)dbm_close(dp);
	if (makeold)
		(void)fclose(oldfp);

	/* Set master.passwd permissions, in case caller forgot. */
	(void)fchmod(fp, S_IRUSR|S_IWUSR);
	(void)fclose(fp);

	/* Install as the real password files. */
	(void)sprintf(buf, "%s.tmp.%s", _PATH_MP_DB, DBM_SUFFIX);
	mv(buf, _PATH_MP_DB);
	(void)sprintf(buf, "%s.tmp.%s", _PATH_SMP_DB, DBM_SUFFIX);
	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);
	}
}

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);
	}
}

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

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
5641bcd3	15	static char sccsid[] = "@(#)pwd_mkdb.c 5.2 (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>
	22	#include <ndbm.h>
	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;
	48	DBM dp, edp;
	49	sigset_t set;
	50	datum key, data;
	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
89	/* Open the password database. */
90	(void)sprintf(buf, "%s.tmp", _PATH_MP_DB);
91	if (!(dp = dbm_open(buf, O_WRONLY\|O_CREAT\|O_EXCL, PERM_INSECURE)))
92	error(buf);
93	clean = FILE_INSECURE;
94
95	/* Open the encrypted password database. */
96	(void)sprintf(buf, "%s.tmp", _PATH_SMP_DB);
97	if (!(edp = dbm_open(buf, O_WRONLY\|O_CREAT\|O_EXCL, PERM_SECURE)))
98	error(buf);
99	clean = FILE_SECURE;
100
101	/*
102	* Open file for old password file. Minor trickiness -- don't want to
103	* chance the file already existing, since someone (stupidly) might
104	* still be using this for permission checking. So, open it first and
105	* fdopen the resulting fd. Don't really care who reads it.
106	*/
107	if (makeold) {
108	(void)sprintf(buf, "%s.orig", pname);
109	if ((tfd = open(buf,
110	O_WRONLY\|O_CREAT\|O_EXCL, PERM_INSECURE)) < 0)
111	error(buf);
112	if (!(oldfp = fdopen(tfd, "w")))
113	error(buf);
114	clean = FILE_ORIG;
115	}
116
117	data.dptr = buf;
118	key.dptr = tbuf;
119	for (cnt = 1; scan(fp, &pwd); ++cnt) {
120	#define COMPACT(e) t = e; while (p++ = t++);
121	/* Create insecure data. */
122	p = buf;
123	COMPACT(pwd.pw_name);
124	COMPACT("*");
125	bcopy((char *)&pwd.pw_uid, p, sizeof(int));
126	p += sizeof(int);
127	bcopy((char *)&pwd.pw_gid, p, sizeof(int));
128	p += sizeof(int);
129	bcopy((char *)&pwd.pw_change, p, sizeof(time_t));
130	p += sizeof(time_t);
131	COMPACT(pwd.pw_class);
132	COMPACT(pwd.pw_gecos);
133	COMPACT(pwd.pw_dir);
134	COMPACT(pwd.pw_shell);
135	bcopy((char *)&pwd.pw_expire, p, sizeof(time_t));
136	p += sizeof(time_t);
137	data.dsize = p - buf;
138
139	/* Store insecure by name. */
140	tbuf[0] = _PW_KEYBYNAME;
141	len = strlen(pwd.pw_name);
142	bcopy(pwd.pw_name, tbuf + 1, len);
143	key.dsize = len + 1;
144	if (dbm_store(dp, key, data, DBM_INSERT) < 0)
145	error("dbm file");
146
147	/* Store insecure by number. */
148	tbuf[0] = _PW_KEYBYNUM;
149	bcopy((char *)&cnt, tbuf + 1, sizeof(cnt));
150	key.dsize = sizeof(cnt) + 1;
151	if (dbm_store(dp, key, data, DBM_INSERT) < 0)
152	error("dbm file");
153
154	/* Store insecure by uid. */
155	tbuf[0] = _PW_KEYBYUID;
156	bcopy((char *)&pwd.pw_uid, tbuf + 1, sizeof(pwd.pw_uid));
157	key.dsize = sizeof(pwd.pw_uid) + 1;
158	if (dbm_store(dp, key, data, DBM_INSERT) < 0)
159	error("dbm file");
160
161	/* Create secure data. */
162	p = buf;
163	COMPACT(pwd.pw_name);
164	COMPACT(pwd.pw_passwd);
165	bcopy((char *)&pwd.pw_uid, p, sizeof(int));
166	p += sizeof(int);
167	bcopy((char *)&pwd.pw_gid, p, sizeof(int));
168	p += sizeof(int);
169	bcopy((char *)&pwd.pw_change, p, sizeof(time_t));
170	p += sizeof(time_t);
171	COMPACT(pwd.pw_class);
172	COMPACT(pwd.pw_gecos);
173	COMPACT(pwd.pw_dir);
174	COMPACT(pwd.pw_shell);
175	bcopy((char *)&pwd.pw_expire, p, sizeof(time_t));
176	p += sizeof(time_t);
177	data.dsize = p - buf;
178
179	/* Store secure by name. */
180	tbuf[0] = _PW_KEYBYNAME;
181	len = strlen(pwd.pw_name);
182	bcopy(pwd.pw_name, tbuf + 1, len);
183	key.dsize = len + 1;
184	if (dbm_store(edp, key, data, DBM_INSERT) < 0)
185	error("dbm file");
186
187	/* Store secure by number. */
188	tbuf[0] = _PW_KEYBYNUM;
189	bcopy((char *)&cnt, tbuf + 1, sizeof(cnt));
190	key.dsize = sizeof(cnt) + 1;
191	if (dbm_store(edp, key, data, DBM_INSERT) < 0)
192	error("dbm file");
193
194	/* Store secure by uid. */
195	tbuf[0] = _PW_KEYBYUID;
196	bcopy((char *)&pwd.pw_uid, tbuf + 1, sizeof(pwd.pw_uid));
197	key.dsize = sizeof(pwd.pw_uid) + 1;
198	if (dbm_store(edp, key, data, DBM_INSERT) < 0)
199	error("dbm file");
200
201	/* Create original format password file entry */
202	if (makeold)
203	(void)fprintf(oldfp, "%s:*:%d:%d:%s:%s:%s\n",
204	pwd.pw_name, pwd.pw_uid, pwd.pw_gid, pwd.pw_gecos,
205	pwd.pw_dir, pwd.pw_shell);
206	}
207	(void)dbm_close(edp);
208	(void)dbm_close(dp);
209	if (makeold)
210	(void)fclose(oldfp);
211
212	/* Set master.passwd permissions, in case caller forgot. */
213	(void)fchmod(fp, S_IRUSR\|S_IWUSR);
214	(void)fclose(fp);
215
216	/* Install as the real password files. */
5641bcd3	217	(void)sprintf(buf, "%s.tmp.%s", _PATH_MP_DB, DBM_SUFFIX);
6257c216	218	mv(buf, _PATH_MP_DB);
5641bcd3	219	(void)sprintf(buf, "%s.tmp.%s", _PATH_SMP_DB, DBM_SUFFIX);
6257c216 KB	220	mv(buf, _PATH_SMP_DB);
	221	if (makeold) {
	222	(void)sprintf(buf, "%s.orig", pname);
	223	mv(buf, _PATH_PASSWD);
	224	}
	225	/*
	226	* Move the master password LAST -- chpass(1), passwd(1) and vipw(8)
	227	* all use flock(2) on it to block other incarnations of themselves.
	228	* The rename means that everything is unlocked, as the original file
	229	* can no longer be accessed.
	230	*/
	231	mv(pname, _PATH_MASTERPASSWD);
	232	exit(0);
	233	}
	234
	235	scan(fp, pw)
	236	FILE *fp;
	237	struct passwd *pw;
	238	{
	239	static int lcnt;
	240	static char line[LINE_MAX];
	241	char *p;
	242
	243	if (!fgets(line, sizeof(line), fp))
	244	return(0);
	245	++lcnt;
	246	/*
	247	* ``... if I swallow anything evil, put your fingers down my
	248	* throat...''
	249	* -- The Who
	250	*/
	251	if (!(p = index(line, '\n'))) {
	252	(void)fprintf(stderr, "pwd_mkdb: line too long\n");
	253	goto fmt;
	254
	255	}
	256	*p = '\0';
	257	if (!pw_scan(line, pw)) {
	258	(void)fprintf(stderr, "pwd_mkdb: at line #%d.\n", lcnt);
	259	fmt: errno = EFTYPE;
	260	error(pname);
	261	exit(1);
	262	}
	263	}
	264
	265	mv(from, to)
	266	char from, to;
	267	{
	268	int sverrno;
	269	char buf[MAXPATHLEN];
	270
	271	if (rename(from, to)) {
	272	sverrno = errno;
	273	(void)sprintf(buf, "%s to %s", from, to);
	274	errno = sverrno;
	275	error(buf);
	276	}
	277	}
	278
	279	cleanup()
	280	{
	281	char buf[MAXPATHLEN];
	282
	283	switch(clean) {
284	case FILE_ORIG:
285	(void)sprintf(buf, "%s.orig", pname);
286	(void)unlink(buf);
287	/* FALLTHROUGH */
288	case FILE_SECURE:
289	(void)sprintf(buf, "%s.tmp", _PATH_SMP_DB);
290	(void)unlink(buf);
291	/* FALLTHROUGH */
292	case FILE_INSECURE:
293	(void)sprintf(buf, "%s.tmp", _PATH_MP_DB);
294	(void)unlink(buf);
295	}
296	}
297
298	error(name)
299	char *name;
300	{
301	(void)fprintf(stderr, "pwd_mkdb: %s: %s\n", name, strerror(errno));
302	cleanup();
303	exit(1);
304	}
305
306	usage()
307	{
308	(void)fprintf(stderr, "usage: pwd_mkdb [-p] file\n");
309	exit(1);
310	}