2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2003 Michael Bretterklieber
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
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.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
32 #include <sys/types.h>
34 #include <netinet/in.h>
47 * NT HASH = md4(str2unicode(pw))
52 crypt_nthash(const char *pw, const char *salt __unused, char *buffer)
56 static const char hexconvtab[] = "0123456789abcdef";
57 static const char *magic = "$3$";
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 buffer = stpcpy(buffer, magic);
76 for (i = 0; i < MD4_SIZE; i++) {
77 *buffer++ = hexconvtab[hash[i] >> 4];
78 *buffer++ = hexconvtab[hash[i] & 15];