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- /*-
- * SPDX-License-Identifier: BSD-2-Clause
- *
- * Copyright (c) 2003 Michael Bretterklieber
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
- #include <sys/types.h>
- #include <netinet/in.h>
- #include <ctype.h>
- #include <err.h>
- #include <md4.h>
- #include <stdarg.h>
- #include <stdio.h>
- #include <string.h>
- #include <unistd.h>
- #include "crypt.h"
- /*
- * NT HASH = md4(str2unicode(pw))
- */
- /* ARGSUSED */
- int
- crypt_nthash(const char *pw, const char *salt __unused, char *buffer)
- {
- size_t unipwLen;
- int i;
- static const char hexconvtab[] = "0123456789abcdef";
- static const char *magic = "$3$";
- u_int16_t unipw[128];
- u_char hash[MD4_SIZE];
- const char *s;
- MD4_CTX ctx;
- bzero(unipw, sizeof(unipw));
- /* convert to unicode (thanx Archie) */
- unipwLen = 0;
- for (s = pw; unipwLen < sizeof(unipw) / 2 && *s; s++)
- unipw[unipwLen++] = htons(*s << 8);
- /* Compute MD4 of Unicode password */
- MD4Init(&ctx);
- MD4Update(&ctx, (u_char *)unipw, unipwLen*sizeof(u_int16_t));
- MD4Final(hash, &ctx);
- buffer = stpcpy(buffer, magic);
- *buffer++ = '$';
- for (i = 0; i < MD4_SIZE; i++) {
- *buffer++ = hexconvtab[hash[i] >> 4];
- *buffer++ = hexconvtab[hash[i] & 15];
- }
- *buffer = '\0';
- return (0);
- }
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