2 * Copyright (c) 2003 Michael Bretterklieber
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
30 #include <sys/types.h>
32 #include <netinet/in.h>
45 * NT HASH = md4(str2unicode(pw))
50 crypt_nthash(const char *pw, const char *salt __unused)
54 static char hexconvtab[] = "0123456789abcdef";
55 static const char *magic = "$3$";
56 static char passwd[120];
58 char final[MD4_SIZE*2 + 1];
59 u_char hash[MD4_SIZE];
63 bzero(unipw, sizeof(unipw));
64 /* convert to unicode (thanx Archie) */
66 for (s = pw; unipwLen < sizeof(unipw) / 2 && *s; s++)
67 unipw[unipwLen++] = htons(*s << 8);
69 /* Compute MD4 of Unicode password */
71 MD4Update(&ctx, (u_char *)unipw, unipwLen*sizeof(u_int16_t));
74 for (i = j = 0; i < MD4_SIZE; i++) {
75 final[j++] = hexconvtab[hash[i] >> 4];
76 final[j++] = hexconvtab[hash[i] & 15];
80 strcpy(passwd, magic);
82 strncat(passwd, final, MD4_SIZE*2);
84 /* Don't leave anything around in vm they could use. */
85 memset(final, 0, sizeof(final));