183cd29562
Replaced lots of spaces by real tabs and resolved other minor issues. Signed-off-by: Daniel Kenji Toyama <kenji.toyama@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
177 lines
4.2 KiB
C
177 lines
4.2 KiB
C
/*
|
|
* Copyright (c) 1996, 2003 VIA Networking Technologies, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* 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.,
|
|
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*
|
|
*
|
|
* File: michael.cpp
|
|
*
|
|
* Purpose: The implementation of LIST data structure.
|
|
*
|
|
* Author: Kyle Hsu
|
|
*
|
|
* Date: Sep 4, 2002
|
|
*
|
|
* Functions:
|
|
* s_dwGetUINT32 - Convert from BYTE[] to DWORD in a portable way
|
|
* s_vPutUINT32 - Convert from DWORD to BYTE[] in a portable way
|
|
* s_vClear - Reset the state to the empty message.
|
|
* s_vSetKey - Set the key.
|
|
* MIC_vInit - Set the key.
|
|
* s_vAppendByte - Append the byte to our word-sized buffer.
|
|
* MIC_vAppend - call s_vAppendByte.
|
|
* MIC_vGetMIC - Append the minimum padding and call s_vAppendByte.
|
|
*
|
|
* Revision History:
|
|
*
|
|
*/
|
|
|
|
#include "tmacro.h"
|
|
#include "michael.h"
|
|
|
|
/*--------------------- Static Definitions -------------------------*/
|
|
|
|
/*--------------------- Static Variables --------------------------*/
|
|
|
|
/*--------------------- Static Functions --------------------------*/
|
|
/*
|
|
* static DWORD s_dwGetUINT32(BYTE * p); Get DWORD from
|
|
* 4 bytes LSByte first
|
|
* static VOID s_vPutUINT32(BYTE* p, DWORD val); Put DWORD into
|
|
* 4 bytes LSByte first
|
|
*/
|
|
static VOID s_vClear(void); /* Clear the internal message,
|
|
* resets the object to the
|
|
* state just after construction. */
|
|
static VOID s_vSetKey(DWORD dwK0, DWORD dwK1);
|
|
static VOID s_vAppendByte(BYTE b); /* Add a single byte to the internal
|
|
* message */
|
|
|
|
/*--------------------- Export Variables --------------------------*/
|
|
static DWORD L, R; /* Current state */
|
|
static DWORD K0, K1; /* Key */
|
|
static DWORD M; /* Message accumulator (single word) */
|
|
static UINT nBytesInM; /* # bytes in M */
|
|
|
|
/*--------------------- Export Functions --------------------------*/
|
|
|
|
/*
|
|
static DWORD s_dwGetUINT32 (BYTE * p)
|
|
// Convert from BYTE[] to DWORD in a portable way
|
|
{
|
|
DWORD res = 0;
|
|
UINT i;
|
|
for(i=0; i<4; i++ )
|
|
res |= (*p++) << (8*i);
|
|
return res;
|
|
}
|
|
|
|
static VOID s_vPutUINT32 (BYTE* p, DWORD val)
|
|
// Convert from DWORD to BYTE[] in a portable way
|
|
{
|
|
UINT i;
|
|
for(i=0; i<4; i++ ) {
|
|
*p++ = (BYTE) (val & 0xff);
|
|
val >>= 8;
|
|
}
|
|
}
|
|
*/
|
|
|
|
static VOID s_vClear(void)
|
|
{
|
|
/* Reset the state to the empty message. */
|
|
L = K0;
|
|
R = K1;
|
|
nBytesInM = 0;
|
|
M = 0;
|
|
}
|
|
|
|
static VOID s_vSetKey(DWORD dwK0, DWORD dwK1)
|
|
{
|
|
/* Set the key */
|
|
K0 = dwK0;
|
|
K1 = dwK1;
|
|
/* and reset the message */
|
|
s_vClear();
|
|
}
|
|
|
|
static VOID s_vAppendByte(BYTE b)
|
|
{
|
|
/* Append the byte to our word-sized buffer */
|
|
M |= b << (8*nBytesInM);
|
|
nBytesInM++;
|
|
/* Process the word if it is full. */
|
|
if (nBytesInM >= 4) {
|
|
L ^= M;
|
|
R ^= ROL32(L, 17);
|
|
L += R;
|
|
R ^= ((L & 0xff00ff00) >> 8) | ((L & 0x00ff00ff) << 8);
|
|
L += R;
|
|
R ^= ROL32(L, 3);
|
|
L += R;
|
|
R ^= ROR32(L, 2);
|
|
L += R;
|
|
/* Clear the buffer */
|
|
M = 0;
|
|
nBytesInM = 0;
|
|
}
|
|
}
|
|
|
|
VOID MIC_vInit(DWORD dwK0, DWORD dwK1)
|
|
{
|
|
/* Set the key */
|
|
s_vSetKey(dwK0, dwK1);
|
|
}
|
|
|
|
|
|
VOID MIC_vUnInit(void)
|
|
{
|
|
/* Wipe the key material */
|
|
K0 = 0;
|
|
K1 = 0;
|
|
|
|
/* And the other fields as well. */
|
|
/* Note that this sets (L,R) to (K0,K1) which is just fine. */
|
|
s_vClear();
|
|
}
|
|
|
|
VOID MIC_vAppend(PBYTE src, UINT nBytes)
|
|
{
|
|
/* This is simple */
|
|
while (nBytes > 0) {
|
|
s_vAppendByte(*src++);
|
|
nBytes--;
|
|
}
|
|
}
|
|
|
|
VOID MIC_vGetMIC(PDWORD pdwL, PDWORD pdwR)
|
|
{
|
|
/* Append the minimum padding */
|
|
s_vAppendByte(0x5a);
|
|
s_vAppendByte(0);
|
|
s_vAppendByte(0);
|
|
s_vAppendByte(0);
|
|
s_vAppendByte(0);
|
|
/* and then zeroes until the length is a multiple of 4 */
|
|
while (nBytesInM != 0)
|
|
s_vAppendByte(0);
|
|
/* The s_vAppendByte function has already computed the result. */
|
|
*pdwL = L;
|
|
*pdwR = R;
|
|
/* Reset to the empty message. */
|
|
s_vClear();
|
|
}
|