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Annotation of src/usr.bin/skeyinfo/skeyinfo.c, Revision 1.2

1.2     ! millert     1: /*     $OpenBSD: skeyinfo.c,v 1.1 1997/07/23 04:10:53 millert Exp $    */
1.1       millert     2:
                      3: /*
                      4:  * Copyright (c) 1997 Todd C. Miller <Todd.Miller@courtesan.com>
                      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.
                     15:  * 3. All advertising materials mentioning features or use of this software
                     16:  *    must display the following acknowledgement:
                     17:  *     This product includes software developed by Todd C. Miller.
                     18:  * 4. The name of the author may not be used to endorse or promote products
                     19:  *    derived from this software without specific prior written permission.
                     20:  *
                     21:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
                     22:  * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
                     23:  * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL
                     24:  * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
                     25:  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
                     26:  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
                     27:  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
                     28:  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
                     29:  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
                     30:  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
                     31:  */
                     32:
                     33: #include <err.h>
                     34: #include <limits.h>
                     35: #include <paths.h>
                     36: #include <pwd.h>
                     37: #include <stdio.h>
                     38: #include <stdlib.h>
                     39: #include <string.h>
                     40: #include <unistd.h>
                     41: #include <skey.h>
                     42:
                     43: extern char *__progname;
                     44:
                     45: void usage __P((void));
                     46:
                     47: int
                     48: main(argc, argv)
                     49:        int argc;
                     50:        char **argv;
                     51: {
                     52:        struct passwd *pw;
                     53:        struct skey key;
                     54:        char *name = NULL;
                     55:        int errs, ch, verbose = 0;
                     56:
                     57:        if (geteuid() != 0)
                     58:                errx(1, "must be setuid root");
                     59:
                     60:        while ((ch = getopt(argc, argv, "v")) != -1)
                     61:                switch(ch) {
                     62:                case 'v':
                     63:                        verbose = 1;
                     64:                        break;
                     65:                default:
                     66:                        usage();
                     67:        }
                     68:        argc -= optind;
                     69:        argv += optind;
                     70:
                     71:        if (argc == 1)
                     72:                name = argv[0];
                     73:        else if (argc > 1)
                     74:                usage();
                     75:
                     76:        if (name && getuid() != 0)
                     77:                errx(1, "only root may specify an alternate user");
                     78:
                     79:        if (name) {
                     80:                if (strlen(name) > PASS_MAX)
                     81:                        errx(1, "username too long (%d chars max)", PASS_MAX);
                     82:                if ((pw = getpwnam(name)) == NULL)
                     83:                        errx(1, "no passwd entry for %s", name);
                     84:        } else {
                     85:                if ((pw = getpwuid(getuid())) == NULL)
                     86:                        errx(1, "no passwd entry for uid %u", getuid());
                     87:        }
                     88:
                     89:        if ((name = strdup(pw->pw_name)) == NULL)
                     90:                err(1, "cannot allocate memory");
                     91:        sevenbit(name);
                     92:
                     93:        errs = skeylookup(&key, name);
                     94:        switch (errs) {
                     95:                case 0:         /* Success! */
                     96:                        if (verbose)
                     97:                                (void)printf("otp-%s ", skey_get_algorithm());
                     98:                        (void)printf("%d %s\n", key.n - 1, key.seed);
                     99:                        break;
                    100:                case -1:        /* File error */
                    101:                        /* XXX - _PATH_SKEYFILE should be in paths.h? */
                    102:                        warnx("cannot open /etc/skeykeys");
                    103:                        break;
                    104:                case 1:         /* Unknown user */
                    105:                        warnx("%s is not listed in /etc/skeykeys", name);
                    106:        }
                    107:
1.2     ! millert   108:        exit(errs);
1.1       millert   109: }
                    110:
                    111: void
                    112: usage()
                    113: {
                    114:        (void)fprintf(stderr, "Usage: %s [-v] [user]\n", __progname);
                    115:        exit(1);
                    116: }