+++ /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 / voretournament / voretournament.git / blobdiff