mirror of
https://github.com/samba-team/samba.git
synced 2025-01-08 21:18:16 +03:00
121 lines
3.8 KiB
C
121 lines
3.8 KiB
C
/*
|
|
Unix SMB/Netbios implementation.
|
|
Version 1.9.
|
|
Interface header: Scheduler service
|
|
Copyright (C) Luke Kenneth Casson Leighton 1996-1999
|
|
Copyright (C) Andrew Tridgell 1992-1999
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program; if not, write to the Free Software
|
|
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*/
|
|
|
|
/* taken direct from rfc2104 implementation and modified for suitable use
|
|
* for ntlmv2.
|
|
*/
|
|
|
|
#include "includes.h"
|
|
|
|
/***********************************************************************
|
|
the rfc 2104 version of hmac_md5 initialisation.
|
|
***********************************************************************/
|
|
void hmac_md5_init_rfc2104(uchar* key, int key_len, HMACMD5Context *ctx)
|
|
{
|
|
int i;
|
|
|
|
/* if key is longer than 64 bytes reset it to key=MD5(key) */
|
|
if (key_len > 64)
|
|
{
|
|
uchar tk[16];
|
|
struct MD5Context tctx;
|
|
|
|
MD5Init(&tctx);
|
|
MD5Update(&tctx, key, key_len);
|
|
MD5Final(tk, &tctx);
|
|
|
|
key = tk;
|
|
key_len = 16;
|
|
}
|
|
|
|
/* start out by storing key in pads */
|
|
bzero( ctx->k_ipad, sizeof ctx->k_ipad);
|
|
bzero( ctx->k_opad, sizeof ctx->k_opad);
|
|
bcopy( key, ctx->k_ipad, key_len);
|
|
bcopy( key, ctx->k_opad, key_len);
|
|
|
|
/* XOR key with ipad and opad values */
|
|
for (i=0; i<64; i++)
|
|
{
|
|
ctx->k_ipad[i] ^= 0x36;
|
|
ctx->k_opad[i] ^= 0x5c;
|
|
}
|
|
|
|
MD5Init(&ctx->ctx);
|
|
MD5Update(&ctx->ctx, ctx->k_ipad, 64);
|
|
}
|
|
|
|
/***********************************************************************
|
|
the microsoft version of hmac_md5 initialisation.
|
|
***********************************************************************/
|
|
void hmac_md5_init_limK_to_64(const uchar* key, int key_len,
|
|
HMACMD5Context *ctx)
|
|
{
|
|
int i;
|
|
|
|
/* if key is longer than 64 bytes truncate it */
|
|
if (key_len > 64)
|
|
{
|
|
key_len = 64;
|
|
}
|
|
|
|
/* start out by storing key in pads */
|
|
bzero( ctx->k_ipad, sizeof ctx->k_ipad);
|
|
bzero( ctx->k_opad, sizeof ctx->k_opad);
|
|
bcopy( key, ctx->k_ipad, key_len);
|
|
bcopy( key, ctx->k_opad, key_len);
|
|
|
|
/* XOR key with ipad and opad values */
|
|
for (i=0; i<64; i++)
|
|
{
|
|
ctx->k_ipad[i] ^= 0x36;
|
|
ctx->k_opad[i] ^= 0x5c;
|
|
}
|
|
|
|
MD5Init(&ctx->ctx);
|
|
MD5Update(&ctx->ctx, ctx->k_ipad, 64);
|
|
}
|
|
|
|
/***********************************************************************
|
|
update hmac_md5 "inner" buffer
|
|
***********************************************************************/
|
|
void hmac_md5_update(const uchar* text, int text_len, HMACMD5Context *ctx)
|
|
{
|
|
MD5Update(&ctx->ctx, text, text_len); /* then text of datagram */
|
|
}
|
|
|
|
/***********************************************************************
|
|
finish off hmac_md5 "inner" buffer and generate outer one.
|
|
***********************************************************************/
|
|
void hmac_md5_final(uchar *digest, HMACMD5Context *ctx)
|
|
|
|
{
|
|
struct MD5Context ctx_o;
|
|
|
|
MD5Final(digest, &ctx->ctx);
|
|
|
|
MD5Init(&ctx_o);
|
|
MD5Update(&ctx_o, ctx->k_opad, 64);
|
|
MD5Update(&ctx_o, digest, 16);
|
|
MD5Final(digest, &ctx_o);
|
|
}
|