1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2003 Michael Bretterklieber
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
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.
15 *
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
26 * SUCH DAMAGE.
27 */
28
29 #include <sys/types.h>
30
31 #include <netinet/in.h>
32
33 #include <ctype.h>
34 #include <err.h>
35 #include <md4.h>
36 #include <stdarg.h>
37 #include <stdio.h>
38 #include <string.h>
39 #include <unistd.h>
40
41 #include "crypt.h"
42
43 /*
44 * NT HASH = md4(str2unicode(pw))
45 */
46
47 /* ARGSUSED */
48 int
crypt_nthash(const char * pw,const char * salt __unused,char * buffer)49 crypt_nthash(const char *pw, const char *salt __unused, char *buffer)
50 {
51 size_t unipwLen;
52 int i;
53 static const char hexconvtab[] = "0123456789abcdef";
54 static const char *magic = "$3$";
55 u_int16_t unipw[128];
56 u_char hash[MD4_SIZE];
57 const char *s;
58 MD4_CTX ctx;
59
60 bzero(unipw, sizeof(unipw));
61 /* convert to unicode (thanx Archie) */
62 unipwLen = 0;
63 for (s = pw; unipwLen < sizeof(unipw) / 2 && *s; s++)
64 unipw[unipwLen++] = htons(*s << 8);
65
66 /* Compute MD4 of Unicode password */
67 MD4Init(&ctx);
68 MD4Update(&ctx, (u_char *)unipw, unipwLen*sizeof(u_int16_t));
69 MD4Final(hash, &ctx);
70
71 buffer = stpcpy(buffer, magic);
72 *buffer++ = '$';
73 for (i = 0; i < MD4_SIZE; i++) {
74 *buffer++ = hexconvtab[hash[i] >> 4];
75 *buffer++ = hexconvtab[hash[i] & 15];
76 }
77 *buffer = '\0';
78
79 return (0);
80 }
81