Annotation of src/usr.bin/encrypt/encrypt.c, Revision 1.45
1.45 ! tb 1: /* $OpenBSD: encrypt.c,v 1.44 2016/09/02 18:06:43 tedu 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 <sys/types.h>
1.15 millert 29: #include <ctype.h>
1.1 downsj 30: #include <err.h>
1.3 downsj 31: #include <errno.h>
1.15 millert 32: #include <pwd.h>
33: #include <stdio.h>
1.7 kstailey 34: #include <stdlib.h>
1.1 downsj 35: #include <string.h>
36: #include <unistd.h>
1.14 millert 37: #include <login_cap.h>
1.27 jdixon 38: #include <limits.h>
1.43 tedu 39: #include <readpassphrase.h>
1.1 downsj 40:
41: /*
42: * Very simple little program, for encrypting passwords from the command
43: * line. Useful for scripts and such.
44: */
45:
1.15 millert 46: extern char *__progname;
1.19 deraadt 47:
1.45 ! tb 48: static void __dead usage(void);
! 49: static void print_passwd(char *, int, char *);
1.3 downsj 50:
1.34 tedu 51: #define DO_BLF 0
52:
1.45 ! tb 53: static void __dead
1.15 millert 54: usage(void)
1.1 downsj 55: {
1.15 millert 56:
57: (void)fprintf(stderr,
1.34 tedu 58: "usage: %s [-b rounds] [-c class] [-p | string]\n",
1.15 millert 59: __progname);
60: exit(1);
1.1 downsj 61: }
62:
1.37 tedu 63: static void
64: print_passwd(char *string, int operation, char *extra)
1.5 provos 65: {
1.34 tedu 66: char buffer[_PASSWORD_LEN];
1.37 tedu 67: const char *pref;
1.39 tedu 68: char prefbuf[64];
1.15 millert 69:
1.33 tedu 70: if (operation == DO_BLF) {
1.39 tedu 71: if (snprintf(prefbuf, sizeof(prefbuf), "blowfish,%s", extra) >=
72: sizeof(prefbuf))
73: errx(1, "pref too long");
1.37 tedu 74: pref = prefbuf;
1.34 tedu 75: } else {
76: login_cap_t *lc;
1.15 millert 77:
1.18 millert 78: if ((lc = login_getclass(extra)) == NULL)
79: errx(1, "unable to get login class `%s'",
80: extra ? (char *)extra : "default");
1.34 tedu 81: pref = login_getcapstr(lc, "localcipher", NULL, NULL);
1.15 millert 82: }
1.37 tedu 83: if (crypt_newhash(string, pref, buffer, sizeof(buffer)) != 0)
1.40 tedu 84: err(1, "can't generate hash");
1.15 millert 85:
1.34 tedu 86: fputs(buffer, stdout);
1.5 provos 87: }
88:
1.15 millert 89: int
90: main(int argc, char **argv)
1.1 downsj 91: {
1.15 millert 92: int opt;
93: int operation = -1;
94: int prompt = 0;
1.40 tedu 95: char *extra = NULL; /* Store login class or number of rounds */
1.27 jdixon 96: const char *errstr;
1.41 deraadt 97:
1.42 doug 98: if (pledge("stdio rpath wpath tty", NULL) == -1)
1.41 deraadt 99: err(1, "pledge");
1.15 millert 100:
1.34 tedu 101: while ((opt = getopt(argc, argv, "pb:c:")) != -1) {
1.15 millert 102: switch (opt) {
103: case 'p':
104: prompt = 1;
105: break;
106: case 'b': /* Blowfish password hash */
107: if (operation != -1)
108: usage();
109: operation = DO_BLF;
1.37 tedu 110: if (strcmp(optarg, "a") != 0) {
111: (void)strtonum(optarg, 4, 31, &errstr);
1.36 deraadt 112: if (errstr != NULL)
1.40 tedu 113: errx(1, "rounds is %s: %s", errstr,
114: optarg);
1.36 deraadt 115: }
1.37 tedu 116: extra = optarg;
1.18 millert 117: break;
118: case 'c': /* user login class */
119: extra = optarg;
120: operation = -1;
1.15 millert 121: break;
122: default:
123: usage();
124: }
1.1 downsj 125: }
126:
1.34 tedu 127: if (((argc - optind) < 1)) {
1.43 tedu 128: char line[BUFSIZ];
1.44 tedu 129: char string[1024];
1.1 downsj 130:
1.15 millert 131: if (prompt) {
1.43 tedu 132: if (readpassphrase("Enter string: ", string,
133: sizeof(string), RPP_ECHO_OFF) == NULL)
134: err(1, "readpassphrase");
1.15 millert 135: print_passwd(string, operation, extra);
136: (void)fputc('\n', stdout);
137: } else {
1.28 krw 138: size_t len;
1.15 millert 139: /* Encrypt stdin to stdout. */
140: while (!feof(stdin) &&
141: (fgets(line, sizeof(line), stdin) != NULL)) {
1.28 krw 142: len = strlen(line);
143: if (len == 0 || line[0] == '\n')
1.15 millert 144: continue;
1.28 krw 145: if (line[len - 1] == '\n')
146: line[len - 1] = '\0';
147:
148: print_passwd(line, operation, extra);
1.15 millert 149:
150: (void)fputc('\n', stdout);
151: }
152: }
1.9 alex 153: } else {
1.15 millert 154: char *string;
155:
156: /* can't combine -p with a supplied string */
157: if (prompt)
158: usage();
159:
160: /* Perhaps it isn't worth worrying about, but... */
161: if ((string = strdup(argv[optind])) == NULL)
162: err(1, NULL);
163: /* Wipe the argument. */
1.40 tedu 164: explicit_bzero(argv[optind], strlen(argv[optind]));
1.15 millert 165:
1.9 alex 166: print_passwd(string, operation, extra);
167:
1.15 millert 168: (void)fputc('\n', stdout);
169:
170: /* Wipe our copy, before we free it. */
1.40 tedu 171: explicit_bzero(string, strlen(string));
1.15 millert 172: free(string);
1.1 downsj 173: }
1.45 ! tb 174: return 0;
1.1 downsj 175: }
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