+++ /dev/null
-/*
- mdfour.c
-
- An implementation of MD4 designed for use in the samba SMB
- authentication protocol
-
- Copyright (C) 1997-1998 Andrew Tridgell
-
- 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:
-
- Free Software Foundation, Inc.
- 59 Temple Place - Suite 330
- Boston, MA 02111-1307, USA
-
- $Id: mdfour.c 7689 2007-11-12 14:28:40Z divverent $
- */
-
-#include <string.h> /* XoXus: needed for memset call */
-#include "md4.h"
-
-/* NOTE: This code makes no attempt to be fast!
-
- It assumes that a int is at least 32 bits long
- */
-
-static struct mdfour *m;
-
-#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 ) )
-#ifdef LARGE_INT32
-#define lshift( x,s ) ( ( ( ( x ) << ( s ) ) & 0xFFFFFFFF ) | ( ( ( x ) >> ( 32 - ( s ) ) ) & 0xFFFFFFFF ) )
-#else
-#define lshift( x,s ) ( ( ( x ) << ( s ) ) | ( ( x ) >> ( 32 - ( s ) ) ) )
-#endif
-
-#define ROUND1( a,b,c,d,k,s ) a = lshift( a + F( b,c,d ) + X[k], s )
-#define ROUND2( a,b,c,d,k,s ) a = lshift( a + G( b,c,d ) + X[k] + 0x5A827999,s )
-#define ROUND3( a,b,c,d,k,s ) a = lshift( a + H( b,c,d ) + X[k] + 0x6ED9EBA1,s )
-
-/* this applies md4 to 64 byte chunks */
-static void mdfour64( uint32 *M ){
- int j;
- uint32 AA, BB, CC, DD;
- uint32 X[16];
- uint32 A,B,C,D;
-
- for ( j = 0; j < 16; j++ )
- X[j] = M[j];
-
- A = m->A; B = m->B; C = m->C; D = m->D;
- AA = A; BB = B; CC = C; DD = D;
-
- ROUND1( A,B,C,D, 0, 3 ); ROUND1( D,A,B,C, 1, 7 );
- ROUND1( C,D,A,B, 2, 11 ); ROUND1( B,C,D,A, 3, 19 );
- ROUND1( A,B,C,D, 4, 3 ); ROUND1( D,A,B,C, 5, 7 );
- ROUND1( C,D,A,B, 6, 11 ); ROUND1( B,C,D,A, 7, 19 );
- ROUND1( A,B,C,D, 8, 3 ); ROUND1( D,A,B,C, 9, 7 );
- ROUND1( C,D,A,B, 10, 11 ); ROUND1( B,C,D,A, 11, 19 );
- ROUND1( A,B,C,D, 12, 3 ); ROUND1( D,A,B,C, 13, 7 );
- ROUND1( C,D,A,B, 14, 11 ); ROUND1( B,C,D,A, 15, 19 );
-
- ROUND2( A,B,C,D, 0, 3 ); ROUND2( D,A,B,C, 4, 5 );
- ROUND2( C,D,A,B, 8, 9 ); ROUND2( B,C,D,A, 12, 13 );
- ROUND2( A,B,C,D, 1, 3 ); ROUND2( D,A,B,C, 5, 5 );
- ROUND2( C,D,A,B, 9, 9 ); ROUND2( B,C,D,A, 13, 13 );
- ROUND2( A,B,C,D, 2, 3 ); ROUND2( D,A,B,C, 6, 5 );
- ROUND2( C,D,A,B, 10, 9 ); ROUND2( B,C,D,A, 14, 13 );
- ROUND2( A,B,C,D, 3, 3 ); ROUND2( D,A,B,C, 7, 5 );
- ROUND2( C,D,A,B, 11, 9 ); ROUND2( B,C,D,A, 15, 13 );
-
- ROUND3( A,B,C,D, 0, 3 ); ROUND3( D,A,B,C, 8, 9 );
- ROUND3( C,D,A,B, 4, 11 ); ROUND3( B,C,D,A, 12, 15 );
- ROUND3( A,B,C,D, 2, 3 ); ROUND3( D,A,B,C, 10, 9 );
- ROUND3( C,D,A,B, 6, 11 ); ROUND3( B,C,D,A, 14, 15 );
- ROUND3( A,B,C,D, 1, 3 ); ROUND3( D,A,B,C, 9, 9 );
- ROUND3( C,D,A,B, 5, 11 ); ROUND3( B,C,D,A, 13, 15 );
- ROUND3( A,B,C,D, 3, 3 ); ROUND3( D,A,B,C, 11, 9 );
- ROUND3( C,D,A,B, 7, 11 ); ROUND3( B,C,D,A, 15, 15 );
-
- A += AA; B += BB; C += CC; D += DD;
-
-#ifdef LARGE_INT32
- A &= 0xFFFFFFFF; B &= 0xFFFFFFFF;
- C &= 0xFFFFFFFF; D &= 0xFFFFFFFF;
-#endif
-
- for ( j = 0; j < 16; j++ )
- X[j] = 0;
-
- m->A = A; m->B = B; m->C = C; m->D = D;
-}
-
-static void copy64( uint32 *M, unsigned char *in ){
- int i;
-
- for ( i = 0; i < 16; i++ )
- M[i] = ( in[i * 4 + 3] << 24 ) | ( in[i * 4 + 2] << 16 ) |
- ( in[i * 4 + 1] << 8 ) | ( in[i * 4 + 0] << 0 );
-}
-
-static void copy4( unsigned char *out,uint32 x ){
- out[0] = x & 0xFF;
- out[1] = ( x >> 8 ) & 0xFF;
- out[2] = ( x >> 16 ) & 0xFF;
- out[3] = ( x >> 24 ) & 0xFF;
-}
-
-void mdfour_begin( struct mdfour *md ){
- md->A = 0x67452301;
- md->B = 0xefcdab89;
- md->C = 0x98badcfe;
- md->D = 0x10325476;
- md->totalN = 0;
-}
-
-
-static void mdfour_tail( unsigned char *in, int n ){
- unsigned char buf[128];
- uint32 M[16];
- uint32 b;
-
- m->totalN += n;
-
- b = m->totalN * 8;
-
- memset( buf, 0, 128 );
- if ( n ) {
- memcpy( buf, in, n );
- }
- buf[n] = 0x80;
-
- if ( n <= 55 ) {
- copy4( buf + 56, b );
- copy64( M, buf );
- mdfour64( M );
- }
- else {
- copy4( buf + 120, b );
- copy64( M, buf );
- mdfour64( M );
- copy64( M, buf + 64 );
- mdfour64( M );
- }
-}
-
-void mdfour_update( struct mdfour *md, unsigned char *in, int n ){
- uint32 M[16];
-
-// start of edit by Forest 'LordHavoc' Hale
-// commented out to prevent crashing when length is 0
-// if (n == 0) mdfour_tail(in, n);
-// end of edit by Forest 'LordHavoc' Hale
-
- m = md;
-
- while ( n >= 64 ) {
- copy64( M, in );
- mdfour64( M );
- in += 64;
- n -= 64;
- m->totalN += 64;
- }
-
- mdfour_tail( in, n );
-}
-
-
-void mdfour_result( struct mdfour *md, unsigned char *out ){
- m = md;
-
- copy4( out, m->A );
- copy4( out + 4, m->B );
- copy4( out + 8, m->C );
- copy4( out + 12, m->D );
-}
-
-
-void mdfour( unsigned char *out, unsigned char *in, int n ){
- struct mdfour md;
- mdfour_begin( &md );
- mdfour_update( &md, in, n );
- mdfour_result( &md, out );
-}
-
-///////////////////////////////////////////////////////////////
-// MD4-based checksum utility functions
-//
-// Copyright (C) 2000 Jeff Teunissen <d2deek@pmail.net>
-//
-// Author: Jeff Teunissen <d2deek@pmail.net>
-// Date: 01 Jan 2000
-
-unsigned Com_BlockChecksum( void *buffer, int length ){
- int digest[4];
- unsigned val;
-
- mdfour( (unsigned char *) digest, (unsigned char *) buffer, length );
-
- val = digest[0] ^ digest[1] ^ digest[2] ^ digest[3];
-
- return val;
-}
-
-void Com_BlockFullChecksum( void *buffer, int len, unsigned char *outbuf ){
- mdfour( outbuf, (unsigned char *) buffer, len );
-}
projects / xonotic / netradiant.git / blobdiff