remove RSA's md4.c, replace by DP's

[xonotic/netradiant.git] / tools / quake2 / common / md4.c

diff --git a/tools/quake2/common/md4.c b/tools/quake2/common/md4.c
index 95fa4a1a791e015008859acdba57bb868da128aa..7c2c9be43bfdf559958537e56b78dcd330c03349 100644 (file)
--- a/tools/quake2/common/md4.c
+++ b/tools/quake2/common/md4.c
@@ -1,297 +1,227 @@
 /*
 /*

-Copyright (C) 1999-2006 Id Software, Inc. and contributors.
-For a list of contributors, see the accompanying CONTRIBUTORS file.
+       mdfour.c

 
 

-This file is part of GtkRadiant.
+       An implementation of MD4 designed for use in the samba SMB
+       authentication protocol

 
 

-GtkRadiant 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.
+       Copyright (C) 1997-1998  Andrew Tridgell

 
 

-GtkRadiant 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.
+       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.

 
 

-You should have received a copy of the GNU General Public License
-along with GtkRadiant; if not, write to the Free Software
-Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
-*/
-/* GLOBAL.H - RSAREF types and constants */
-
-#include <string.h>
-
-/* POINTER defines a generic pointer type */
-typedef unsigned char *POINTER;
-
-/* UINT2 defines a two byte word */
-typedef unsigned short int UINT2;
-
-/* UINT4 defines a four byte word */
-typedef unsigned long int UINT4;
-
-  
-/* MD4.H - header file for MD4C.C */
-
-/* Copyright (C) 1991-2, RSA Data Security, Inc. Created 1991. 
-
-All rights reserved.
-  
-License to copy and use this software is granted provided that it is identified as the RSA Data Security, Inc. MD4 Message-Digest Algorithm in all material mentioning or referencing this software or this function.
-License is also granted to make and use derivative works provided that such works are identified as derived from the RSA Data Security, Inc. MD4 Message-Digest Algorithm in all material mentioning or referencing the derived work.
-RSA Data Security, Inc. makes no representations concerning either the merchantability of this software or the suitability of this software for any particular purpose. It is provided as is without express or implied warranty of any kind.
-  
-These notices must be retained in any copies of any part of this documentation and/or software. */
-
-/* MD4 context. */
-typedef struct {
-       UINT4 state[4];                         /* state (ABCD) */
-       UINT4 count[2];                         /* number of bits, modulo 2^64 (lsb first) */
-       unsigned char buffer[64];                       /* input buffer */
-} MD4_CTX;
-
-void MD4Init (MD4_CTX *);
-void MD4Update (MD4_CTX *, unsigned char *, unsigned int);
-void MD4Final (unsigned char [16], MD4_CTX *);
-  
-
-  
-/* MD4C.C - RSA Data Security, Inc., MD4 message-digest algorithm */
-/* Copyright (C) 1990-2, RSA Data Security, Inc. All rights reserved.
-  
-License to copy and use this software is granted provided that it is identified as the
-RSA Data Security, Inc. MD4 Message-Digest Algorithm
- in all material mentioning or referencing this software or this function.
-License is also granted to make and use derivative works provided that such works are identified as 
-derived from the RSA Data Security, Inc. MD4 Message-Digest Algorithm
-in all material mentioning or referencing the derived work.
-RSA Data Security, Inc. makes no representations concerning either the merchantability of this software or the suitability of this software for any particular purpose. It is provided
-as is without express or implied warranty of any kind.
-  
-These notices must be retained in any copies of any part of this documentation and/or software. */
-
-/* Constants for MD4Transform routine.  */
-#define S11 3
-#define S12 7
-#define S13 11
-#define S14 19
-#define S21 3
-#define S22 5
-#define S23 9
-#define S24 13
-#define S31 3
-#define S32 9
-#define S33 11
-#define S34 15
-
-static void MD4Transform (UINT4 [4], unsigned char [64]);
-static void Encode (unsigned char *, UINT4 *, unsigned int);
-static void Decode (UINT4 *, unsigned char *, unsigned int);
-static void MD4_memcpy (POINTER, POINTER, unsigned int);
-static void MD4_memset (POINTER, int, unsigned int);
-
-static unsigned char PADDING[64] = {
-0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
-};
-
-/* F, G and H are basic MD4 functions. */
-#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))
-
-/* ROTATE_LEFT rotates x left n bits. */
-#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
-
-/* FF, GG and HH are transformations for rounds 1, 2 and 3 */
-/* Rotation is separate from addition to prevent recomputation */
-#define FF(a, b, c, d, x, s) {(a) += F ((b), (c), (d)) + (x); (a) = ROTATE_LEFT ((a), (s));}
-
-#define GG(a, b, c, d, x, s) {(a) += G ((b), (c), (d)) + (x) + (UINT4)0x5a827999; (a) = ROTATE_LEFT ((a), (s));}
-
-#define HH(a, b, c, d, x, s) {(a) += H ((b), (c), (d)) + (x) + (UINT4)0x6ed9eba1; (a) = \
-ROTATE_LEFT ((a), (s)); }
-
-
-/* MD4 initialization. Begins an MD4 operation, writing a new context. */
-void MD4Init (MD4_CTX *context)
-{
-       context->count[0] = context->count[1] = 0;
+       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.

 
 

-/* Load magic initialization constants.*/
-context->state[0] = 0x67452301;
-context->state[1] = 0xefcdab89;
-context->state[2] = 0x98badcfe;
-context->state[3] = 0x10325476;
-}
+       See the GNU General Public License for more details.

 
 

-/* MD4 block update operation. Continues an MD4 message-digest operation, processing another message block, and updating the context. */
-void MD4Update (MD4_CTX *context, unsigned char *input, unsigned int inputLen)
-{
-       unsigned int i, index, partLen;
+       You should have received a copy of the GNU General Public License
+       along with this program; if not, write to:

 
 

-       /* Compute number of bytes mod 64 */
-       index = (unsigned int)((context->count[0] >> 3) & 0x3F);
+               Free Software Foundation, Inc.
+               59 Temple Place - Suite 330
+               Boston, MA  02111-1307, USA

 
 

-       /* Update number of bits */
-       if ((context->count[0] += ((UINT4)inputLen << 3))< ((UINT4)inputLen << 3))
-               context->count[1]++;
+       $Id: mdfour.c 7689 2007-11-12 14:28:40Z divverent $
+*/

 
 

-       context->count[1] += ((UINT4)inputLen >> 29);
+#include <string.h>            /* XoXus: needed for memset call */
+#include "md4.h"

 
 

-       partLen = 64 - index;
+/* NOTE: This code makes no attempt to be fast!

 
 

-       /* Transform as many times as possible.*/
-       if (inputLen >= partLen)
-       {
-               memcpy((POINTER)&context->buffer[index], (POINTER)input, partLen);
-               MD4Transform (context->state, context->buffer);
+   It assumes that a int is at least 32 bits long
+*/

 
 

-               for (i = partLen; i + 63 < inputLen; i += 64)
-                       MD4Transform (context->state, &input[i]);
+static struct mdfour *m;

 
 

-               index = 0;
-       }
-       else
-               i = 0;
+#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

 
 

-       /* Buffer remaining input */
-       memcpy ((POINTER)&context->buffer[index], (POINTER)&input[i], inputLen-i);
-}
+#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)

 
 

-
-/* MD4 finalization. Ends an MD4 message-digest operation, writing the the message digest and zeroizing the context. */
-void MD4Final (unsigned char digest[16], MD4_CTX *context)
+/* this applies md4 to 64 byte chunks */
+static void mdfour64(uint32 *M)

 {
 {

-       unsigned char bits[8];
-       unsigned int index, padLen;
+       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;
+}

 
 

-       /* Save number of bits */
-       Encode (bits, context->count, 8);
+static void copy64(uint32 *M, unsigned char *in)
+{
+       int i;

 
 

-       /* Pad out to 56 mod 64.*/
-       index = (unsigned int)((context->count[0] >> 3) & 0x3f);
-       padLen = (index < 56) ? (56 - index) : (120 - index);
-       MD4Update (context, PADDING, padLen);
+       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);
+}

 
 

-       /* Append length (before padding) */
-       MD4Update (context, bits, 8);
-       
-       /* Store state in digest */
-       Encode (digest, context->state, 16);
+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;
+}

 
 

-       /* Zeroize sensitive information.*/
-       memset ((POINTER)context, 0, sizeof (*context));
+void mdfour_begin(struct mdfour *md)
+{
+       md->A = 0x67452301;
+       md->B = 0xefcdab89;
+       md->C = 0x98badcfe;
+       md->D = 0x10325476;
+       md->totalN = 0;

 }
 
 
 }
 
 

-/* MD4 basic transformation. Transforms state based on block. */
-static void MD4Transform (UINT4 state[4], unsigned char block[64])
+static void mdfour_tail(unsigned char *in, int n)

 {
 {

-       UINT4 a = state[0], b = state[1], c = state[2], d = state[3], x[16];
-
-       Decode (x, block, 64);
-
-/* Round 1 */
-FF (a, b, c, d, x[ 0], S11);                           /* 1 */
-FF (d, a, b, c, x[ 1], S12);                           /* 2 */
-FF (c, d, a, b, x[ 2], S13);                           /* 3 */
-FF (b, c, d, a, x[ 3], S14);                           /* 4 */
-FF (a, b, c, d, x[ 4], S11);                           /* 5 */
-FF (d, a, b, c, x[ 5], S12);                           /* 6 */
-FF (c, d, a, b, x[ 6], S13);                           /* 7 */
-FF (b, c, d, a, x[ 7], S14);                           /* 8 */
-FF (a, b, c, d, x[ 8], S11);                           /* 9 */
-FF (d, a, b, c, x[ 9], S12);                           /* 10 */
-FF (c, d, a, b, x[10], S13);                   /* 11 */
-FF (b, c, d, a, x[11], S14);                   /* 12 */
-FF (a, b, c, d, x[12], S11);                   /* 13 */
-FF (d, a, b, c, x[13], S12);                   /* 14 */
-FF (c, d, a, b, x[14], S13);                   /* 15 */
-FF (b, c, d, a, x[15], S14);                   /* 16 */
-
-/* Round 2 */
-GG (a, b, c, d, x[ 0], S21);                   /* 17 */
-GG (d, a, b, c, x[ 4], S22);                   /* 18 */
-GG (c, d, a, b, x[ 8], S23);                   /* 19 */
-GG (b, c, d, a, x[12], S24);                   /* 20 */
-GG (a, b, c, d, x[ 1], S21);                   /* 21 */
-GG (d, a, b, c, x[ 5], S22);                   /* 22 */
-GG (c, d, a, b, x[ 9], S23);                   /* 23 */
-GG (b, c, d, a, x[13], S24);                   /* 24 */
-GG (a, b, c, d, x[ 2], S21);                   /* 25 */
-GG (d, a, b, c, x[ 6], S22);                   /* 26 */
-GG (c, d, a, b, x[10], S23);                   /* 27 */
-GG (b, c, d, a, x[14], S24);                   /* 28 */
-GG (a, b, c, d, x[ 3], S21);                   /* 29 */
-GG (d, a, b, c, x[ 7], S22);                   /* 30 */
-GG (c, d, a, b, x[11], S23);                   /* 31 */
-GG (b, c, d, a, x[15], S24);                   /* 32 */
-
-/* Round 3 */
-HH (a, b, c, d, x[ 0], S31);                           /* 33 */
-HH (d, a, b, c, x[ 8], S32);                   /* 34 */
-HH (c, d, a, b, x[ 4], S33);                   /* 35 */
-HH (b, c, d, a, x[12], S34);                   /* 36 */
-HH (a, b, c, d, x[ 2], S31);                   /* 37 */
-HH (d, a, b, c, x[10], S32);                   /* 38 */
-HH (c, d, a, b, x[ 6], S33);                   /* 39 */
-HH (b, c, d, a, x[14], S34);                   /* 40 */
-HH (a, b, c, d, x[ 1], S31);                   /* 41 */
-HH (d, a, b, c, x[ 9], S32);                   /* 42 */
-HH (c, d, a, b, x[ 5], S33);                   /* 43 */
-HH (b, c, d, a, x[13], S34);                   /* 44 */
-HH (a, b, c, d, x[ 3], S31);                   /* 45 */
-HH (d, a, b, c, x[11], S32);                   /* 46 */
-HH (c, d, a, b, x[ 7], S33);                   /* 47 */
-HH (b, c, d, a, x[15], S34);                   /* 48 */
-
-state[0] += a;
-state[1] += b;
-state[2] += c;
-state[3] += d;
-
-       /* Zeroize sensitive information.*/
-       memset ((POINTER)x, 0, sizeof (x));
+       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);
+       }

 }
 
 }
 

-
-/* Encodes input (UINT4) into output (unsigned char). Assumes len is a multiple of 4. */
-static void Encode (unsigned char *output, UINT4 *input, unsigned int len)
+void mdfour_update(struct mdfour *md, unsigned char *in, int n)

 {
 {

-       unsigned int i, j;
+       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;

 
 

-       for (i = 0, j = 0; j < len; i++, j += 4) {
-               output[j] = (unsigned char)(input[i] & 0xff);
-               output[j+1] = (unsigned char)((input[i] >> 8) & 0xff);
-               output[j+2] = (unsigned char)((input[i] >> 16) & 0xff);
-               output[j+3] = (unsigned char)((input[i] >> 24) & 0xff);
+       while (n >= 64) {
+               copy64(M, in);
+               mdfour64(M);
+               in += 64;
+               n -= 64;
+               m->totalN += 64;

        }
        }

+
+       mdfour_tail(in, n);

 }
 
 
 }
 
 

-/* Decodes input (unsigned char) into output (UINT4). Assumes len is a multiple of 4. */
-static void Decode (UINT4 *output, unsigned char *input, unsigned int len)
+void mdfour_result(struct mdfour *md, unsigned char *out)

 {
 {

-unsigned int i, j;
+       m = md;

 
 

-for (i = 0, j = 0; j < len; i++, j += 4)
-       output[i] = ((UINT4)input[j]) | (((UINT4)input[j+1]) << 8) | (((UINT4)input[j+2]) << 16) | (((UINT4)input[j+3]) << 24);
+       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)
 {
 
 unsigned Com_BlockChecksum (void *buffer, int length)
 {

-       int                     digest[4];
-       unsigned        val;
-       MD4_CTX         ctx;
-
-       MD4Init (&ctx);
-       MD4Update (&ctx, (unsigned char *)buffer, length);
-       MD4Final ( (unsigned char *)digest, &ctx);
-       
+       int                             digest[4];
+       unsigned                val;
+
+       mdfour ( (unsigned char *) digest, (unsigned char *) buffer, length );
+

        val = digest[0] ^ digest[1] ^ digest[2] ^ digest[3];
 
        return val;
 }
        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 );
+}
+