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/cdefs.h> 30 #include <sys/types.h> 31 32 #include <netinet/in.h> 33 34 #include <ctype.h> 35 #include <err.h> 36 #include <md4.h> 37 #include <stdarg.h> 38 #include <stdio.h> 39 #include <string.h> 40 #include <unistd.h> 41 42 #include "crypt.h" 43 44 /* 45 * NT HASH = md4(str2unicode(pw)) 46 */ 47 48 /* ARGSUSED */ 49 int 50 crypt_nthash(const char *pw, const char *salt __unused, char *buffer) 51 { 52 size_t unipwLen; 53 int i; 54 static const char hexconvtab[] = "0123456789abcdef"; 55 static const char *magic = "$3$"; 56 u_int16_t unipw[128]; 57 u_char hash[MD4_SIZE]; 58 const char *s; 59 MD4_CTX ctx; 60 61 bzero(unipw, sizeof(unipw)); 62 /* convert to unicode (thanx Archie) */ 63 unipwLen = 0; 64 for (s = pw; unipwLen < sizeof(unipw) / 2 && *s; s++) 65 unipw[unipwLen++] = htons(*s << 8); 66 67 /* Compute MD4 of Unicode password */ 68 MD4Init(&ctx); 69 MD4Update(&ctx, (u_char *)unipw, unipwLen*sizeof(u_int16_t)); 70 MD4Final(hash, &ctx); 71 72 buffer = stpcpy(buffer, magic); 73 *buffer++ = '$'; 74 for (i = 0; i < MD4_SIZE; i++) { 75 *buffer++ = hexconvtab[hash[i] >> 4]; 76 *buffer++ = hexconvtab[hash[i] & 15]; 77 } 78 *buffer = '\0'; 79 80 return (0); 81 } 82