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Annotation of src/usr.bin/skeyinfo/skeyinfo.c, Revision 1.1

1.1     ! millert     1: /*     $OpenBSD$       */
        !             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:
        !           108:        return(errs);
        !           109: }
        !           110:
        !           111: void
        !           112: usage()
        !           113: {
        !           114:        (void)fprintf(stderr, "Usage: %s [-v] [user]\n", __progname);
        !           115:        exit(1);
        !           116: }