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

1.2     ! downsj      1: /*     $OpenBSD: encrypt.c,v 1.1 1996/08/08 02:07:22 downsj Exp $      */
1.1       downsj      2:
                      3: /*
                      4:  * Copyright (c) 1996, Jason Downs.  All rights reserved.
                      5:  *
                      6:  * Redistribution and use in source and binary forms, with or without
                      7:  * modification, are permitted provided that the following conditions
                      8:  * are met:
                      9:  * 1. Redistributions of source code must retain the above copyright
                     10:  *    notice, this list of conditions and the following disclaimer.
                     11:  * 2. Redistributions in binary form must reproduce the above copyright
                     12:  *    notice, this list of conditions and the following disclaimer in the
                     13:  *    documentation and/or other materials provided with the distribution.
                     14:  *
                     15:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS
                     16:  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
                     17:  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
                     18:  * DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT,
                     19:  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
                     20:  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
                     21:  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
                     22:  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     23:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     24:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     25:  * SUCH DAMAGE.
                     26:  */
                     27:
                     28: #include <stdio.h>
                     29: #include <sys/types.h>
                     30: #include <err.h>
                     31: #include <string.h>
                     32: #include <unistd.h>
                     33:
                     34: /*
                     35:  * Very simple little program, for encrypting passwords from the command
                     36:  * line.  Useful for scripts and such.
                     37:  */
                     38:
                     39: extern char *__progname;
                     40: extern char *optarg;
                     41: extern int optind;
                     42:
                     43: void usage()
                     44: {
                     45:     errx(1, "usage: %s [-m] [-s salt] [string]", __progname);
                     46: }
                     47:
1.2     ! downsj     48: char *trim(line)
        !            49:     char *line;
        !            50: {
        !            51:     char *ptr;
        !            52:
        !            53:     for (ptr = &line[strlen(line)-1]; ptr > line; ptr--) {
        !            54:         if (!isspace(*ptr))
        !            55:            break;
        !            56:     }
        !            57:     ptr[1] = '\0';
        !            58:
        !            59:     for (ptr = line; *ptr && isspace(*ptr); ptr++);
        !            60:
        !            61:     return(ptr);
        !            62: }
        !            63:
1.1       downsj     64: int main(argc, argv)
                     65:     int argc;
                     66:     char *argv[];
                     67: {
                     68:     int opt;
                     69:     int do_md5 = 0;
                     70:     char *salt = (char *)NULL;
                     71:
                     72:     while ((opt = getopt(argc, argv, "ms:")) != -1) {
                     73:        switch (opt) {
                     74:        case 'm':
                     75:            do_md5 = 1;
                     76:            break;
                     77:        case 's':
                     78:            salt = optarg;
                     79:            break;
                     80:        default:
                     81:            usage();
                     82:        }
                     83:     }
                     84:
                     85:     if (do_md5 && (salt != (char *)NULL))
                     86:        usage();
                     87:
                     88:     if (!do_md5 && (salt == (char *)NULL))
                     89:        usage();
                     90:
                     91:     if ((argc - optind) < 1) {
1.2     ! downsj     92:        char line[BUFSIZ], *string;
1.1       downsj     93:
                     94:        /* Encrypt stdin to stdout. */
                     95:        while (!feof(stdin) && (fgets(line, sizeof(line), stdin) != NULL)) {
1.2     ! downsj     96:            /* Kill the whitesapce. */
        !            97:            string = trim(line);
        !            98:            if (*string == '\0')
1.1       downsj     99:                continue;
                    100:
1.2     ! downsj    101:            fputs(crypt(string, (do_md5 ? "$1$" : salt)), stdout);
1.1       downsj    102:            fputc('\n', stdout);
                    103:        }
                    104:     } else {
                    105:        char *string;
                    106:
                    107:        /* Perhaps it isn't worth worrying about, but... */
                    108:        string = strdup(argv[optind]);
                    109:        if (string == (char *)NULL)
                    110:            err(1, NULL);
                    111:        /* Wipe the argument. */
                    112:        bzero(argv[optind], strlen(argv[optind]));
                    113:
                    114:        fputs(crypt(string, (do_md5 ? "$1$" : salt)), stdout);
                    115:        fputc('\n', stdout);
                    116:
                    117:        /* Wipe our copy, before we free it. */
                    118:        bzero(string, strlen(string));
                    119:        free(string);
                    120:     }
                    121:     exit(0);
                    122: }