Annotation of src/usr.bin/skeyinfo/skeyinfo.c, Revision 1.9
1.9 ! millert 1: /* $OpenBSD: skeyinfo.c,v 1.8 2001/06/17 22:54:44 millert Exp $ */
1.1 millert 2:
3: /*
1.7 millert 4: * Copyright (c) 1997, 2001 Todd C. Miller <Todd.Miller@courtesan.com>
1.1 millert 5: * All rights reserved.
6: *
7: * Redistribution and use in source and binary forms, with or without
8: * modification, are permitted provided that the following conditions
9: * are met:
10: * 1. Redistributions of source code must retain the above copyright
11: * notice, this list of conditions and the following disclaimer.
12: * 2. Redistributions in binary form must reproduce the above copyright
13: * notice, this list of conditions and the following disclaimer in the
14: * documentation and/or other materials provided with the distribution.
1.5 millert 15: * 3. The name of the author may not be used to endorse or promote products
1.1 millert 16: * derived from this software without specific prior written permission.
17: *
18: * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
19: * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
20: * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
21: * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
22: * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
23: * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
24: * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
25: * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
26: * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
27: * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28: */
29:
30: #include <err.h>
31: #include <pwd.h>
32: #include <stdio.h>
33: #include <string.h>
34: #include <unistd.h>
35: #include <skey.h>
1.7 millert 36: #include <login_cap.h>
37: #include <bsd_auth.h>
1.1 millert 38:
39: extern char *__progname;
40:
1.9 ! millert 41: void usage(void);
1.1 millert 42:
43: int
1.9 ! millert 44: main(int argc, char **argv)
1.1 millert 45: {
46: struct passwd *pw;
1.9 ! millert 47: char *style, *challenge, *cp, *name;
1.7 millert 48: int ch, verbose = 0;
1.9 ! millert 49: login_cap_t *lc;
1.7 millert 50: auth_session_t *as;
1.1 millert 51:
1.9 ! millert 52: name = NULL;
! 53: style = "skey";
! 54: while ((ch = getopt(argc, argv, "a:v")) != -1)
1.1 millert 55: switch(ch) {
1.9 ! millert 56: case 'a':
! 57: style = optarg;
! 58: break;
1.1 millert 59: case 'v':
60: verbose = 1;
61: break;
62: default:
63: usage();
64: }
65: argc -= optind;
66: argv += optind;
67:
68: if (argc == 1)
69: name = argv[0];
70: else if (argc > 1)
71: usage();
72:
73: if (name && getuid() != 0)
74: errx(1, "only root may specify an alternate user");
75:
76: if (name) {
77: if ((pw = getpwnam(name)) == NULL)
78: errx(1, "no passwd entry for %s", name);
79: } else {
80: if ((pw = getpwuid(getuid())) == NULL)
81: errx(1, "no passwd entry for uid %u", getuid());
82: }
83:
84: if ((name = strdup(pw->pw_name)) == NULL)
85: err(1, "cannot allocate memory");
86:
1.9 ! millert 87: if ((lc = login_getclass(pw->pw_class)) == NULL)
! 88: errx(1, "unable to classify user %s", name);
! 89:
! 90: if ((cp = login_getstyle(lc, style, NULL)) == NULL)
! 91: errx(1, "unknown authentication method %s", style);
! 92:
! 93: as = auth_userchallenge(name, cp, NULL, &challenge);
1.7 millert 94: if (as == NULL || challenge == NULL) {
1.8 millert 95: if (as)
96: auth_close(as);
1.9 ! millert 97: errx(1, "unable to retrieve challenge for %s", name);
1.1 millert 98: }
99:
1.7 millert 100: /*
101: * We only want the first line of the challenge so stop after a newline.
102: * If the user wants the full challenge including the hash type
103: * or if the challenge didn't start with 'otp-', print it verbatim.
104: * Otherwise, strip off the first word.
105: */
106: if ((cp = strchr(challenge, '\n')))
107: *cp = '\0';
108: cp = strchr(challenge, ' ');
109: if (verbose || *challenge != 'o' || !cp)
110: cp = challenge;
111: else
112: cp++;
113: puts(cp);
114:
115: auth_close(as);
116: exit(0);
1.1 millert 117: }
118:
119: void
1.9 ! millert 120: usage(void)
1.1 millert 121: {
1.9 ! millert 122:
! 123: (void)fprintf(stderr, "Usage: %s [-a auth-type] [-v] [user]\n",
! 124: __progname);
1.1 millert 125: exit(1);
126: }