Annotation of src/usr.bin/encrypt/encrypt.c, Revision 1.28
1.28 ! krw 1: /* $OpenBSD: encrypt.c,v 1.27 2007/05/01 01:26:25 jdixon 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>
1.1 downsj 39:
40: /*
41: * Very simple little program, for encrypting passwords from the command
42: * line. Useful for scripts and such.
43: */
44:
1.5 provos 45: #define DO_MAKEKEY 0
46: #define DO_DES 1
47: #define DO_MD5 2
48: #define DO_BLF 3
49:
1.15 millert 50: extern char *__progname;
1.5 provos 51: char buffer[_PASSWORD_LEN];
1.19 deraadt 52:
53: void usage(void);
54: void print_passwd(char *, int, void *);
1.3 downsj 55:
1.15 millert 56: void
57: usage(void)
1.1 downsj 58: {
1.15 millert 59:
60: (void)fprintf(stderr,
1.25 jmc 61: "usage: %s [-km] [-b rounds] [-c class] [-p | string] [-s salt]\n",
1.15 millert 62: __progname);
63: exit(1);
1.1 downsj 64: }
65:
1.15 millert 66: void
67: print_passwd(char *string, int operation, void *extra)
1.5 provos 68: {
1.23 moritz 69: char msalt[3], *salt, *cryptstr;
1.15 millert 70: login_cap_t *lc;
1.21 millert 71: int pwd_gensalt(char *, int, login_cap_t *, char);
1.22 deraadt 72: void to64(char *, u_int32_t, int n);
1.15 millert 73:
74: switch(operation) {
75: case DO_MAKEKEY:
76: /*
77: * makekey mode: parse string into separate DES key and salt.
78: */
79: if (strlen(string) != 10) {
80: /* To be compatible... */
81: errx(1, "%s", strerror(EFTYPE));
82: }
1.17 deraadt 83: strlcpy(msalt, &string[8], sizeof msalt);
1.15 millert 84: salt = msalt;
85: break;
86:
87: case DO_MD5:
1.17 deraadt 88: strlcpy(buffer, "$1$", sizeof buffer);
1.15 millert 89: to64(&buffer[3], arc4random(), 4);
90: to64(&buffer[7], arc4random(), 4);
1.17 deraadt 91: strlcpy(buffer + 11, "$", sizeof buffer - 11);
1.15 millert 92: salt = buffer;
93: break;
94:
95: case DO_BLF:
96: strlcpy(buffer, bcrypt_gensalt(*(int *)extra), _PASSWORD_LEN);
97: salt = buffer;
98: break;
99:
100: case DO_DES:
101: salt = extra;
102: break;
103:
104: default:
1.18 millert 105: if ((lc = login_getclass(extra)) == NULL)
106: errx(1, "unable to get login class `%s'",
107: extra ? (char *)extra : "default");
1.21 millert 108: if (!pwd_gensalt(buffer, _PASSWORD_LEN, lc, 'l'))
1.15 millert 109: errx(1, "can't generate salt");
110: salt = buffer;
111: break;
112: }
113:
1.23 moritz 114: if ((cryptstr = crypt(string, salt)) == NULL)
115: errx(1, "crypt failed");
116: fputs(cryptstr, stdout);
1.5 provos 117: }
118:
1.15 millert 119: int
120: main(int argc, char **argv)
1.1 downsj 121: {
1.15 millert 122: int opt;
123: int operation = -1;
124: int prompt = 0;
125: int rounds;
1.18 millert 126: void *extra = NULL; /* Store salt or number of rounds */
1.27 jdixon 127: const char *errstr;
1.15 millert 128:
129: if (strcmp(__progname, "makekey") == 0)
130: operation = DO_MAKEKEY;
131:
1.18 millert 132: while ((opt = getopt(argc, argv, "kmps:b:c:")) != -1) {
1.15 millert 133: switch (opt) {
134: case 'k': /* Stdin/Stdout Unix crypt */
135: if (operation != -1 || prompt)
136: usage();
137: operation = DO_MAKEKEY;
138: break;
139:
140: case 'm': /* MD5 password hash */
141: if (operation != -1)
142: usage();
143: operation = DO_MD5;
144: break;
145:
146: case 'p':
147: if (operation == DO_MAKEKEY)
148: usage();
149: prompt = 1;
150: break;
151:
152: case 's': /* Unix crypt (DES) */
153: if (operation != -1 || optarg[0] == '$')
154: usage();
155: operation = DO_DES;
156: extra = optarg;
157: break;
158:
159: case 'b': /* Blowfish password hash */
160: if (operation != -1)
161: usage();
162: operation = DO_BLF;
1.27 jdixon 163: rounds = strtonum(optarg, 1, INT_MAX, &errstr);
164: if (errstr != NULL)
165: errx(1, "%s: %s", errstr, optarg);
1.15 millert 166: extra = &rounds;
1.18 millert 167: break;
168:
169: case 'c': /* user login class */
170: extra = optarg;
171: operation = -1;
1.15 millert 172: break;
173:
174: default:
175: usage();
176: }
1.1 downsj 177: }
178:
1.15 millert 179: if (((argc - optind) < 1) || operation == DO_MAKEKEY) {
180: char line[BUFSIZ], *string;
1.1 downsj 181:
1.15 millert 182: if (prompt) {
1.20 otto 183: if ((string = getpass("Enter string: ")) == NULL)
184: err(1, "getpass");
1.15 millert 185: print_passwd(string, operation, extra);
186: (void)fputc('\n', stdout);
187: } else {
1.28 ! krw 188: size_t len;
1.15 millert 189: /* Encrypt stdin to stdout. */
190: while (!feof(stdin) &&
191: (fgets(line, sizeof(line), stdin) != NULL)) {
1.28 ! krw 192: len = strlen(line);
! 193: if (len == 0 || line[0] == '\n')
1.15 millert 194: continue;
1.28 ! krw 195: if (line[len - 1] == '\n')
! 196: line[len - 1] = '\0';
! 197:
! 198: print_passwd(line, operation, extra);
1.15 millert 199:
200: if (operation == DO_MAKEKEY) {
201: fflush(stdout);
202: break;
203: }
204: (void)fputc('\n', stdout);
205: }
206: }
1.9 alex 207: } else {
1.15 millert 208: char *string;
209:
210: /* can't combine -p with a supplied string */
211: if (prompt)
212: usage();
213:
214: /* Perhaps it isn't worth worrying about, but... */
215: if ((string = strdup(argv[optind])) == NULL)
216: err(1, NULL);
217: /* Wipe the argument. */
218: memset(argv[optind], 0, strlen(argv[optind]));
219:
1.9 alex 220: print_passwd(string, operation, extra);
221:
1.15 millert 222: (void)fputc('\n', stdout);
223:
224: /* Wipe our copy, before we free it. */
225: memset(string, 0, strlen(string));
226: free(string);
1.1 downsj 227: }
1.15 millert 228: exit(0);
1.1 downsj 229: }
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