diff options
Diffstat (limited to 'lib/libcrypt/crypt-nthash.c')
-rw-r--r-- | lib/libcrypt/crypt-nthash.c | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/lib/libcrypt/crypt-nthash.c b/lib/libcrypt/crypt-nthash.c new file mode 100644 index 0000000..19b84ce --- /dev/null +++ b/lib/libcrypt/crypt-nthash.c @@ -0,0 +1,88 @@ +/*- + * 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/cdefs.h> +__FBSDID("$FreeBSD$"); + +#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 */ +char * +crypt_nthash(const char *pw, const char *salt __unused) +{ + size_t unipwLen; + int i, j; + static char hexconvtab[] = "0123456789abcdef"; + static const char *magic = "$3$"; + static char passwd[120]; + u_int16_t unipw[128]; + char final[MD4_SIZE*2 + 1]; + 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); + + for (i = j = 0; i < MD4_SIZE; i++) { + final[j++] = hexconvtab[hash[i] >> 4]; + final[j++] = hexconvtab[hash[i] & 15]; + } + final[j] = '\0'; + + strcpy(passwd, magic); + strcat(passwd, "$"); + strncat(passwd, final, MD4_SIZE*2); + + /* Don't leave anything around in vm they could use. */ + memset(final, 0, sizeof(final)); + + return (passwd); +} |