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wine/dlls/advapi32/crypt_md4.c
Jonathan Ernst 360a3f9142 Update the address of the Free Software Foundation.
2006-05-23 14:11:13 +02:00

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/*
* Copyright (C) 2001 Nikos Mavroyanopoulos
* Copyright (C) 2004 Hans Leidekker
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
/*
* This code implements the MD4 message-digest algorithm.
* It is based on code in the public domain written by Colin
* Plumb in 1993. The algorithm is due to Ron Rivest.
*
* Equivalent code is available from RSA Data Security, Inc.
* This code has been tested against that, and is equivalent,
* except that you don't need to include two pages of legalese
* with every copy.
*
* To compute the message digest of a chunk of bytes, declare an
* MD4_CTX structure, pass it to MD4Init, call MD4Update as
* needed on buffers full of bytes, and then call MD4Final, which
* will fill a supplied 16-byte array with the digest.
*/
#include <stdarg.h>
#include "ntstatus.h"
#define WIN32_NO_STATUS
#include "windef.h"
#include "winternl.h"
typedef struct
{
unsigned int buf[4];
unsigned int i[2];
unsigned char in[64];
unsigned char digest[16];
} MD4_CTX;
static void MD4Transform( unsigned int buf[4], unsigned int const in[16] );
/*
* Note: this code is harmless on little-endian machines.
*/
static void byteReverse( unsigned char *buf, unsigned longs )
{
unsigned int t;
do {
t = (unsigned int)((unsigned)buf[3] << 8 | buf[2]) << 16 |
((unsigned)buf[1] << 8 | buf[0]);
*(unsigned int *)buf = t;
buf += 4;
} while (--longs);
}
/*
* Start MD4 accumulation. Set bit count to 0 and buffer to mysterious
* initialization constants.
*/
VOID WINAPI MD4Init( MD4_CTX *ctx )
{
ctx->buf[0] = 0x67452301;
ctx->buf[1] = 0xefcdab89;
ctx->buf[2] = 0x98badcfe;
ctx->buf[3] = 0x10325476;
ctx->i[0] = ctx->i[1] = 0;
}
/*
* Update context to reflect the concatenation of another buffer full
* of bytes.
*/
VOID WINAPI MD4Update( MD4_CTX *ctx, const unsigned char *buf, unsigned int len )
{
register unsigned int t;
/* Update bitcount */
t = ctx->i[0];
if ((ctx->i[0] = t + ((unsigned int)len << 3)) < t)
ctx->i[1]++; /* Carry from low to high */
ctx->i[1] += len >> 29;
t = (t >> 3) & 0x3f;
/* Handle any leading odd-sized chunks */
if (t)
{
unsigned char *p = (unsigned char *)ctx->in + t;
t = 64 - t;
if (len < t)
{
memcpy( p, buf, len );
return;
}
memcpy( p, buf, t );
byteReverse( ctx->in, 16 );
MD4Transform( ctx->buf, (unsigned int *)ctx->in );
buf += t;
len -= t;
}
/* Process data in 64-byte chunks */
while (len >= 64)
{
memcpy( ctx->in, buf, 64 );
byteReverse( ctx->in, 16 );
MD4Transform( ctx->buf, (unsigned int *)ctx->in );
buf += 64;
len -= 64;
}
/* Handle any remaining bytes of data. */
memcpy( ctx->in, buf, len );
}
/*
* Final wrapup - pad to 64-byte boundary with the bit pattern
* 1 0* (64-bit count of bits processed, MSB-first)
*/
VOID WINAPI MD4Final( MD4_CTX *ctx )
{
unsigned int count;
unsigned char *p;
/* Compute number of bytes mod 64 */
count = (ctx->i[0] >> 3) & 0x3F;
/* Set the first char of padding to 0x80. This is safe since there is
always at least one byte free */
p = ctx->in + count;
*p++ = 0x80;
/* Bytes of padding needed to make 64 bytes */
count = 64 - 1 - count;
/* Pad out to 56 mod 64 */
if (count < 8)
{
/* Two lots of padding: Pad the first block to 64 bytes */
memset( p, 0, count );
byteReverse( ctx->in, 16 );
MD4Transform( ctx->buf, (unsigned int *)ctx->in );
/* Now fill the next block with 56 bytes */
memset( ctx->in, 0, 56 );
}
else
{
/* Pad block to 56 bytes */
memset( p, 0, count - 8 );
}
byteReverse( ctx->in, 14 );
/* Append length in bits and transform */
((unsigned int *)ctx->in)[14] = ctx->i[0];
((unsigned int *)ctx->in)[15] = ctx->i[1];
MD4Transform( ctx->buf, (unsigned int *)ctx->in );
byteReverse( (unsigned char *)ctx->buf, 4 );
memcpy( ctx->digest, ctx->buf, 16 );
}
/* The three core functions */
#define rotl32(x,n) (((x) << ((unsigned int)(n))) | ((x) >> (32 - (unsigned int)(n))))
#define F( x, y, z ) (((x) & (y)) | ((~x) & (z)))
#define G( x, y, z ) (((x) & (y)) | ((x) & (z)) | ((y) & (z)))
#define H( x, y, z ) ((x) ^ (y) ^ (z))
#define FF( a, b, c, d, x, s ) { \
(a) += F( (b), (c), (d) ) + (x); \
(a) = rotl32( (a), (s) ); \
}
#define GG( a, b, c, d, x, s ) { \
(a) += G( (b), (c), (d) ) + (x) + (unsigned int)0x5a827999; \
(a) = rotl32( (a), (s) ); \
}
#define HH( a, b, c, d, x, s ) { \
(a) += H( (b), (c), (d) ) + (x) + (unsigned int)0x6ed9eba1; \
(a) = rotl32( (a), (s) ); \
}
/*
* The core of the MD4 algorithm
*/
static void MD4Transform( unsigned int buf[4], const unsigned int in[16] )
{
register unsigned int a, b, c, d;
a = buf[0];
b = buf[1];
c = buf[2];
d = buf[3];
FF( a, b, c, d, in[0], 3 );
FF( d, a, b, c, in[1], 7 );
FF( c, d, a, b, in[2], 11 );
FF( b, c, d, a, in[3], 19 );
FF( a, b, c, d, in[4], 3 );
FF( d, a, b, c, in[5], 7 );
FF( c, d, a, b, in[6], 11 );
FF( b, c, d, a, in[7], 19 );
FF( a, b, c, d, in[8], 3 );
FF( d, a, b, c, in[9], 7 );
FF( c, d, a, b, in[10], 11 );
FF( b, c, d, a, in[11], 19 );
FF( a, b, c, d, in[12], 3 );
FF( d, a, b, c, in[13], 7 );
FF( c, d, a, b, in[14], 11 );
FF( b, c, d, a, in[15], 19 );
GG( a, b, c, d, in[0], 3 );
GG( d, a, b, c, in[4], 5 );
GG( c, d, a, b, in[8], 9 );
GG( b, c, d, a, in[12], 13 );
GG( a, b, c, d, in[1], 3 );
GG( d, a, b, c, in[5], 5 );
GG( c, d, a, b, in[9], 9 );
GG( b, c, d, a, in[13], 13 );
GG( a, b, c, d, in[2], 3 );
GG( d, a, b, c, in[6], 5 );
GG( c, d, a, b, in[10], 9 );
GG( b, c, d, a, in[14], 13 );
GG( a, b, c, d, in[3], 3 );
GG( d, a, b, c, in[7], 5 );
GG( c, d, a, b, in[11], 9 );
GG( b, c, d, a, in[15], 13 );
HH( a, b, c, d, in[0], 3 );
HH( d, a, b, c, in[8], 9 );
HH( c, d, a, b, in[4], 11 );
HH( b, c, d, a, in[12], 15 );
HH( a, b, c, d, in[2], 3 );
HH( d, a, b, c, in[10], 9 );
HH( c, d, a, b, in[6], 11 );
HH( b, c, d, a, in[14], 15 );
HH( a, b, c, d, in[1], 3 );
HH( d, a, b, c, in[9], 9 );
HH( c, d, a, b, in[5], 11 );
HH( b, c, d, a, in[13], 15 );
HH( a, b, c, d, in[3], 3 );
HH( d, a, b, c, in[11], 9 );
HH( c, d, a, b, in[7], 11 );
HH( b, c, d, a, in[15], 15 );
buf[0] += a;
buf[1] += b;
buf[2] += c;
buf[3] += d;
}
/******************************************************************************
* SystemFunction007 [ADVAPI32.@]
*
* MD4 hash a unicode string
*
* PARAMS
* string [I] the string to hash
* output [O] the md4 hash of the string (16 bytes)
*
* RETURNS
* Success: STATUS_SUCCESS
* Failure: STATUS_UNSUCCESSFUL
*
*/
NTSTATUS WINAPI SystemFunction007(PUNICODE_STRING string, LPBYTE hash)
{
MD4_CTX ctx;
MD4Init( &ctx );
MD4Update( &ctx, (BYTE*) string->Buffer, string->Length );
MD4Final( &ctx );
memcpy( hash, ctx.digest, 0x10 );
return STATUS_SUCCESS;
}
/******************************************************************************
* SystemFunction010 [ADVAPI32.@]
* SystemFunction011 [ADVAPI32.@]
*
* MD4 hashes 16 bytes of data
*
* PARAMS
* unknown [] seems to have no effect on the output
* data [I] pointer to data to hash (16 bytes)
* output [O] the md4 hash of the data (16 bytes)
*
* RETURNS
* Success: STATUS_SUCCESS
* Failure: STATUS_UNSUCCESSFUL
*
*/
NTSTATUS WINAPI SystemFunction010(LPVOID unknown, LPBYTE data, LPBYTE hash)
{
MD4_CTX ctx;
MD4Init( &ctx );
MD4Update( &ctx, data, 0x10 );
MD4Final( &ctx );
memcpy( hash, ctx.digest, 0x10 );
return STATUS_SUCCESS;
}
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