Annotation of src/usr.bin/lock/lock.c, Revision 1.19
1.19 ! deraadt 1: /* $OpenBSD: lock.c,v 1.18 2002/08/04 01:08:54 deraadt Exp $ */
1.2 deraadt 2: /* $NetBSD: lock.c,v 1.8 1996/05/07 18:32:31 jtc Exp $ */
1.1 deraadt 3:
4: /*
5: * Copyright (c) 1980, 1987, 1993
6: * The Regents of the University of California. All rights reserved.
7: *
8: * This code is derived from software contributed to Berkeley by
9: * Bob Toxen.
10: *
11: * Redistribution and use in source and binary forms, with or without
12: * modification, are permitted provided that the following conditions
13: * are met:
14: * 1. Redistributions of source code must retain the above copyright
15: * notice, this list of conditions and the following disclaimer.
16: * 2. Redistributions in binary form must reproduce the above copyright
17: * notice, this list of conditions and the following disclaimer in the
18: * documentation and/or other materials provided with the distribution.
19: * 3. All advertising materials mentioning features or use of this software
20: * must display the following acknowledgement:
21: * This product includes software developed by the University of
22: * California, Berkeley and its contributors.
23: * 4. Neither the name of the University nor the names of its contributors
24: * may be used to endorse or promote products derived from this software
25: * without specific prior written permission.
26: *
27: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
28: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
29: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
30: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
31: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
32: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
33: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
34: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
35: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
36: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37: * SUCH DAMAGE.
38: */
39:
40: #ifndef lint
41: static char copyright[] =
42: "@(#) Copyright (c) 1980, 1987, 1993\n\
43: The Regents of the University of California. All rights reserved.\n";
44: #endif /* not lint */
45:
46: #ifndef lint
47: #if 0
48: static char sccsid[] = "@(#)lock.c 8.1 (Berkeley) 6/6/93";
49: #endif
1.19 ! deraadt 50: static char rcsid[] = "$OpenBSD: lock.c,v 1.18 2002/08/04 01:08:54 deraadt Exp $";
1.1 deraadt 51: #endif /* not lint */
52:
53: /*
54: * Lock a terminal up until the given key is entered, until the root
55: * password is entered, or the given interval times out.
56: *
57: * Timeout interval is by default TIMEOUT, it can be changed with
58: * an argument of the form -time where time is in minutes
59: */
60:
61: #include <sys/param.h>
62: #include <sys/stat.h>
63: #include <sys/time.h>
64: #include <signal.h>
65:
66: #include <ctype.h>
67: #include <err.h>
68: #include <pwd.h>
1.13 millert 69: #include <readpassphrase.h>
1.1 deraadt 70: #include <stdio.h>
1.2 deraadt 71: #include <stdlib.h>
1.1 deraadt 72: #include <string.h>
73: #include <termios.h>
1.2 deraadt 74: #include <unistd.h>
1.1 deraadt 75:
1.13 millert 76: #include <login_cap.h>
77: #include <bsd_auth.h>
1.7 millert 78:
1.1 deraadt 79: #define TIMEOUT 15
80:
1.15 millert 81: void bye(int);
82: void hi(int);
1.1 deraadt 83:
84: struct timeval timeout;
85: struct timeval zerotime;
1.13 millert 86: time_t nexttime; /* keep the timeout time */
1.9 millert 87: int no_timeout; /* lock terminal forever */
1.1 deraadt 88:
1.13 millert 89: extern char *__progname;
90:
1.1 deraadt 91: /*ARGSUSED*/
1.9 millert 92: int
1.18 deraadt 93: main(int argc, char *argv[])
1.1 deraadt 94: {
1.18 deraadt 95: char hostname[MAXHOSTNAMELEN], s[BUFSIZ], s1[BUFSIZ], date[256];
96: char *p, *style, *nstyle, *ttynam;
97: struct itimerval ntimer, otimer;
98: int ch, sectimeout, usemine;
1.1 deraadt 99: struct passwd *pw;
100: struct tm *timp;
101: time_t curtime;
1.13 millert 102: login_cap_t *lc;
1.1 deraadt 103:
104: sectimeout = TIMEOUT;
1.13 millert 105: style = NULL;
1.1 deraadt 106: usemine = 0;
1.6 downsj 107: no_timeout = 0;
1.1 deraadt 108:
109: if (!(pw = getpwuid(getuid())))
1.17 deraadt 110: errx(1, "unknown uid %u.", getuid());
1.13 millert 111:
112: lc = login_getclass(pw->pw_class);
1.1 deraadt 113:
1.13 millert 114: while ((ch = getopt(argc, argv, "a:npt:")) != -1)
1.19 ! deraadt 115: switch (ch) {
1.13 millert 116: case 'a':
117: if (lc) {
118: style = login_getstyle(lc, optarg, "auth-lock");
119: if (style == NULL)
120: errx(1,
121: "invalid authentication style: %s",
122: optarg);
123: }
124: usemine = 1;
125: break;
1.1 deraadt 126: case 't':
127: if ((sectimeout = atoi(optarg)) <= 0)
128: errx(1, "illegal timeout value: %s", optarg);
129: break;
130: case 'p':
131: usemine = 1;
132: break;
1.6 downsj 133: case 'n':
134: no_timeout = 1;
135: break;
1.1 deraadt 136: case '?':
137: default:
1.10 millert 138: (void)fprintf(stderr,
1.13 millert 139: "usage: %s [-n] [-p] [-a style] [-t timeout]\n",
140: __progname);
1.1 deraadt 141: exit(1);
142: }
143: timeout.tv_sec = sectimeout * 60;
144:
145: gethostname(hostname, sizeof(hostname));
1.13 millert 146: if (!(ttynam = ttyname(STDIN_FILENO)))
1.1 deraadt 147: errx(1, "not a terminal?");
1.13 millert 148: curtime = time(NULL);
149: nexttime = curtime + (sectimeout * 60);
1.1 deraadt 150: timp = localtime(&curtime);
1.13 millert 151: strftime(date, sizeof(date), "%c", timp);
1.1 deraadt 152:
1.13 millert 153: if (!usemine) {
1.1 deraadt 154: /* get key and check again */
1.13 millert 155: if (!readpassphrase("Key: ", s, sizeof(s), RPP_ECHO_OFF) ||
156: *s == '\0')
157: exit(0);
1.1 deraadt 158: /*
159: * Don't need EOF test here, if we get EOF, then s1 != s
160: * and the right things will happen.
161: */
1.13 millert 162: (void)readpassphrase("Again: ", s1, sizeof(s1), RPP_ECHO_OFF);
1.1 deraadt 163: if (strcmp(s1, s)) {
1.13 millert 164: warnx("\apasswords didn't match.");
1.1 deraadt 165: exit(1);
166: }
1.5 deraadt 167: s[0] = '\0';
1.1 deraadt 168: }
169:
170: /* set signal handlers */
171: (void)signal(SIGINT, hi);
172: (void)signal(SIGQUIT, hi);
173: (void)signal(SIGTSTP, hi);
174: (void)signal(SIGALRM, bye);
175:
176: ntimer.it_interval = zerotime;
177: ntimer.it_value = timeout;
1.6 downsj 178: if (!no_timeout)
179: setitimer(ITIMER_REAL, &ntimer, &otimer);
1.1 deraadt 180:
181: /* header info */
1.6 downsj 182: if (no_timeout) {
1.13 millert 183: (void)fprintf(stderr,
184: "%s: %s on %s. no timeout\ntime now is %s\n",
185: __progname, ttynam, hostname, date);
1.6 downsj 186: } else {
1.13 millert 187: (void)fprintf(stderr,
188: "%s: %s on %s. timeout in %d minutes\ntime now is %s\n",
189: __progname, ttynam, hostname, sectimeout, date);
1.6 downsj 190: }
1.1 deraadt 191:
192: for (;;) {
1.13 millert 193: if (!readpassphrase("Key: ", s, sizeof(s), RPP_ECHO_OFF) ||
194: *s == '\0') {
1.9 millert 195: hi(0);
1.1 deraadt 196: continue;
197: }
198: if (usemine) {
1.13 millert 199: /*
200: * If user entered 's/key' or the style specified via
201: * the '-a' argument, auth_userokay() will prompt
202: * for a new password. Otherwise, use what we have.
203: */
204: if ((strcmp(s, "s/key") == 0 &&
205: (nstyle = login_getstyle(lc, "skey", "auth-lock")))
206: || ((nstyle = style) && strcmp(s, nstyle) == 0))
207: p = NULL;
208: else
209: p = s;
210: if (auth_userokay(pw->pw_name, nstyle, "auth-lock", p))
1.1 deraadt 211: break;
1.13 millert 212: } else if (strcmp(s, s1) == 0)
1.1 deraadt 213: break;
1.13 millert 214: (void)putc('\a', stderr);
1.1 deraadt 215: }
1.9 millert 216:
1.13 millert 217: exit(0);
1.1 deraadt 218: }
219:
220: void
1.18 deraadt 221: hi(int dummy)
1.1 deraadt 222: {
1.14 deraadt 223: char buf[1024], buf2[1024];
1.13 millert 224: time_t now;
1.1 deraadt 225:
1.14 deraadt 226: if (no_timeout)
227: buf2[0] = '\0';
228: else {
1.13 millert 229: now = time(NULL);
1.14 deraadt 230: (void)snprintf(buf2, sizeof buf2, " timeout in %d:%d minutes",
231: (nexttime - now) / 60, (nexttime - now) % 60);
1.6 downsj 232: }
1.14 deraadt 233: snprintf(buf, sizeof buf, "%s: type in the unlock key.%s\n",
234: __progname, buf2);
235: (void) write(STDERR_FILENO, buf, strlen(buf));
1.1 deraadt 236: }
237:
238: void
1.18 deraadt 239: bye(int dummy)
1.1 deraadt 240: {
241:
1.13 millert 242: if (!no_timeout)
1.16 millert 243: warnx("timeout");
244: _exit(1);
1.1 deraadt 245: }
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