| @@ -0,0 +1,3021 @@
+Index: snort-2.8.6/src/twofish.c
+===================================================================
+--- snort-2.8.6/src/twofish.c (Revision 0)
++++ snort-2.8.6/src/twofish.c (Revision 3)
+@@ -0,0 +1,971 @@
++/* $Id: twofish.c,v 2.1 2008/12/15 20:36:05 fknobbe Exp $
++ *
++ *
++ * Copyright (C) 1997-2000 The Cryptix Foundation Limited.
++ * Copyright (C) 2000 Farm9.
++ * Copyright (C) 2001 Frank Knobbe.
++ * All rights reserved.
++ *
++ * For Cryptix code:
++ * Use, modification, copying and distribution of this software is subject
++ * the terms and conditions of the Cryptix General Licence. You should have
++ * received a copy of the Cryptix General Licence along with this library;
++ * if not, you can download a copy from http://www.cryptix.org/ .
++ *
++ * For Farm9:
++ * --- jojo@farm9.com, August 2000, converted from Java to C++, added CBC mode and
++ * ciphertext stealing technique, added AsciiTwofish class for easy encryption
++ * decryption of text strings
++ *
++ * Frank Knobbe <frank@knobbe.us>:
++ * --- April 2001, converted from C++ to C, prefixed global variables
++ * with TwoFish, substituted some defines, changed functions to make use of
++ * variables supplied in a struct, modified and added routines for modular calls.
++ * Cleaned up the code so that defines are used instead of fixed 16's and 32's.
++ * Created two general purpose crypt routines for one block and multiple block
++ * encryption using Joh's CBC code.
++ * Added crypt routines that use a header (with a magic and data length).
++ * (Basically a major rewrite).
++ *
++ * Note: Routines labeled _TwoFish are private and should not be used
++ * (or with extreme caution).
++ *
++ */
++
++#ifndef __TWOFISH_LIBRARY_SOURCE__
++#define __TWOFISH_LIBRARY_SOURCE__
++
++#include <string.h>
++#include <stdlib.h>
++#include <time.h>
++#include <ctype.h>
++#include <sys/types.h>
++
++#ifdef WIN32
++
++#ifndef u_long
++typedef unsigned long u_long;
++#endif
++#ifndef u_int32_t
++typedef unsigned long u_int32_t;
++#endif
++#ifndef u_word
++typedef unsigned short u_word;
++#endif
++#ifndef u_int16_t
++typedef unsigned short u_int16_t;
++#endif
++#ifndef u_char
++typedef unsigned char u_char;
++#endif
++#ifndef u_int8_t
++typedef unsigned char u_int8_t;
++#endif
++
++#endif /* WIN32 */
++
++#include "twofish.h"
++
++
++bool TwoFish_srand=TRUE; /* if TRUE, first call of TwoFishInit will seed rand(); */
++ /* of TwoFishInit */
++
++/* Fixed 8x8 permutation S-boxes */
++static const u_int8_t TwoFish_P[2][256] =
++{
++ { /* p0 */
++ 0xA9, 0x67, 0xB3, 0xE8, 0x04, 0xFD, 0xA3, 0x76, 0x9A, 0x92, 0x80, 0x78,
++ 0xE4, 0xDD, 0xD1, 0x38, 0x0D, 0xC6, 0x35, 0x98, 0x18, 0xF7, 0xEC, 0x6C,
++ 0x43, 0x75, 0x37, 0x26, 0xFA, 0x13, 0x94, 0x48, 0xF2, 0xD0, 0x8B, 0x30,
++ 0x84, 0x54, 0xDF, 0x23, 0x19, 0x5B, 0x3D, 0x59, 0xF3, 0xAE, 0xA2, 0x82,
++ 0x63, 0x01, 0x83, 0x2E, 0xD9, 0x51, 0x9B, 0x7C, 0xA6, 0xEB, 0xA5, 0xBE,
++ 0x16, 0x0C, 0xE3, 0x61, 0xC0, 0x8C, 0x3A, 0xF5, 0x73, 0x2C, 0x25, 0x0B,
++ 0xBB, 0x4E, 0x89, 0x6B, 0x53, 0x6A, 0xB4, 0xF1, 0xE1, 0xE6, 0xBD, 0x45,
++ 0xE2, 0xF4, 0xB6, 0x66, 0xCC, 0x95, 0x03, 0x56, 0xD4, 0x1C, 0x1E, 0xD7,
++ 0xFB, 0xC3, 0x8E, 0xB5, 0xE9, 0xCF, 0xBF, 0xBA, 0xEA, 0x77, 0x39, 0xAF,
++ 0x33, 0xC9, 0x62, 0x71, 0x81, 0x79, 0x09, 0xAD, 0x24, 0xCD, 0xF9, 0xD8,
++ 0xE5, 0xC5, 0xB9, 0x4D, 0x44, 0x08, 0x86, 0xE7, 0xA1, 0x1D, 0xAA, 0xED,
++ 0x06, 0x70, 0xB2, 0xD2, 0x41, 0x7B, 0xA0, 0x11, 0x31, 0xC2, 0x27, 0x90,
++ 0x20, 0xF6, 0x60, 0xFF, 0x96, 0x5C, 0xB1, 0xAB, 0x9E, 0x9C, 0x52, 0x1B,
++ 0x5F, 0x93, 0x0A, 0xEF, 0x91, 0x85, 0x49, 0xEE, 0x2D, 0x4F, 0x8F, 0x3B,
++ 0x47, 0x87, 0x6D, 0x46, 0xD6, 0x3E, 0x69, 0x64, 0x2A, 0xCE, 0xCB, 0x2F,
++ 0xFC, 0x97, 0x05, 0x7A, 0xAC, 0x7F, 0xD5, 0x1A, 0x4B, 0x0E, 0xA7, 0x5A,
++ 0x28, 0x14, 0x3F, 0x29, 0x88, 0x3C, 0x4C, 0x02, 0xB8, 0xDA, 0xB0, 0x17,
++ 0x55, 0x1F, 0x8A, 0x7D, 0x57, 0xC7, 0x8D, 0x74, 0xB7, 0xC4, 0x9F, 0x72,
++ 0x7E, 0x15, 0x22, 0x12, 0x58, 0x07, 0x99, 0x34, 0x6E, 0x50, 0xDE, 0x68,
++ 0x65, 0xBC, 0xDB, 0xF8, 0xC8, 0xA8, 0x2B, 0x40, 0xDC, 0xFE, 0x32, 0xA4,
++ 0xCA, 0x10, 0x21, 0xF0, 0xD3, 0x5D, 0x0F, 0x00, 0x6F, 0x9D, 0x36, 0x42,
++ 0x4A, 0x5E, 0xC1, 0xE0
++ },
++ { /* p1 */
++ 0x75, 0xF3, 0xC6, 0xF4, 0xDB, 0x7B, 0xFB, 0xC8, 0x4A, 0xD3, 0xE6, 0x6B,
++ 0x45, 0x7D, 0xE8, 0x4B, 0xD6, 0x32, 0xD8, 0xFD, 0x37, 0x71, 0xF1, 0xE1,
++ 0x30, 0x0F, 0xF8, 0x1B, 0x87, 0xFA, 0x06, 0x3F, 0x5E, 0xBA, 0xAE, 0x5B,
++ 0x8A, 0x00, 0xBC, 0x9D, 0x6D, 0xC1, 0xB1, 0x0E, 0x80, 0x5D, 0xD2, 0xD5,
++ 0xA0, 0x84, 0x07, 0x14, 0xB5, 0x90, 0x2C, 0xA3, 0xB2, 0x73, 0x4C, 0x54,
++ 0x92, 0x74, 0x36, 0x51, 0x38, 0xB0, 0xBD, 0x5A, 0xFC, 0x60, 0x62, 0x96,
++ 0x6C, 0x42, 0xF7, 0x10, 0x7C, 0x28, 0x27, 0x8C, 0x13, 0x95, 0x9C, 0xC7,
++ 0x24, 0x46, 0x3B, 0x70, 0xCA, 0xE3, 0x85, 0xCB, 0x11, 0xD0, 0x93, 0xB8,
++ 0xA6, 0x83, 0x20, 0xFF, 0x9F, 0x77, 0xC3, 0xCC, 0x03, 0x6F, 0x08, 0xBF,
++ 0x40, 0xE7, 0x2B, 0xE2, 0x79, 0x0C, 0xAA, 0x82, 0x41, 0x3A, 0xEA, 0xB9,
++ 0xE4, 0x9A, 0xA4, 0x97, 0x7E, 0xDA, 0x7A, 0x17, 0x66, 0x94, 0xA1, 0x1D,
++ 0x3D, 0xF0, 0xDE, 0xB3, 0x0B, 0x72, 0xA7, 0x1C, 0xEF, 0xD1, 0x53, 0x3E,
++ 0x8F, 0x33, 0x26, 0x5F, 0xEC, 0x76, 0x2A, 0x49, 0x81, 0x88, 0xEE, 0x21,
++ 0xC4, 0x1A, 0xEB, 0xD9, 0xC5, 0x39, 0x99, 0xCD, 0xAD, 0x31, 0x8B, 0x01,
++ 0x18, 0x23, 0xDD, 0x1F, 0x4E, 0x2D, 0xF9, 0x48, 0x4F, 0xF2, 0x65, 0x8E,
++ 0x78, 0x5C, 0x58, 0x19, 0x8D, 0xE5, 0x98, 0x57, 0x67, 0x7F, 0x05, 0x64,
++ 0xAF, 0x63, 0xB6, 0xFE, 0xF5, 0xB7, 0x3C, 0xA5, 0xCE, 0xE9, 0x68, 0x44,
++ 0xE0, 0x4D, 0x43, 0x69, 0x29, 0x2E, 0xAC, 0x15, 0x59, 0xA8, 0x0A, 0x9E,
++ 0x6E, 0x47, 0xDF, 0x34, 0x35, 0x6A, 0xCF, 0xDC, 0x22, 0xC9, 0xC0, 0x9B,
++ 0x89, 0xD4, 0xED, 0xAB, 0x12, 0xA2, 0x0D, 0x52, 0xBB, 0x02, 0x2F, 0xA9,
++ 0xD7, 0x61, 0x1E, 0xB4, 0x50, 0x04, 0xF6, 0xC2, 0x16, 0x25, 0x86, 0x56,
++ 0x55, 0x09, 0xBE, 0x91
++ }
++};
++
++static bool TwoFish_MDSready=FALSE;
++static u_int32_t TwoFish_MDS[4][256]; /* TwoFish_MDS matrix */
++
++
++#define TwoFish_LFSR1(x) (((x)>>1)^(((x)&0x01)?TwoFish_MDS_GF_FDBK/2:0))
++#define TwoFish_LFSR2(x) (((x)>>2)^(((x)&0x02)?TwoFish_MDS_GF_FDBK/2:0)^(((x)&0x01)?TwoFish_MDS_GF_FDBK/4:0))
++
++#define TwoFish_Mx_1(x) ((u_int32_t)(x)) /* force result to dword so << will work */
++#define TwoFish_Mx_X(x) ((u_int32_t)((x)^TwoFish_LFSR2(x))) /* 5B */
++#define TwoFish_Mx_Y(x) ((u_int32_t)((x)^TwoFish_LFSR1(x)^TwoFish_LFSR2(x))) /* EF */
++#define TwoFish_RS_rem(x) { u_int8_t b=(u_int8_t)(x>>24); u_int32_t g2=((b<<1)^((b&0x80)?TwoFish_RS_GF_FDBK:0))&0xFF; u_int32_t g3=((b>>1)&0x7F)^((b&1)?TwoFish_RS_GF_FDBK>>1:0)^g2; x=(x<<8)^(g3<<24)^(g2<<16)^(g3<<8)^b; }
++
++/*#define TwoFish__b(x,N) (((u_int8_t *)&x)[((N)&3)^TwoFish_ADDR_XOR])*/ /* pick bytes out of a dword */
++
++#define TwoFish_b0(x) TwoFish__b(x,0) /* extract LSB of u_int32_t */
++#define TwoFish_b1(x) TwoFish__b(x,1)
++#define TwoFish_b2(x) TwoFish__b(x,2)
++#define TwoFish_b3(x) TwoFish__b(x,3) /* extract MSB of u_int32_t */
++
++u_int8_t TwoFish__b(u_int32_t x,int n)
++{ n&=3;
++ while(n-->0)
++ x>>=8;
++ return (u_int8_t)x;
++}
++
++
++/* TwoFish Initialization
++ *
++ * This routine generates a global data structure for use with TwoFish,
++ * initializes important values (such as subkeys, sBoxes), generates subkeys
++ * and precomputes the MDS matrix if not already done.
++ *
++ * Input: User supplied password (will be appended by default password of 'SnortHas2FishEncryptionRoutines!')
++ *
++ * Output: Pointer to TWOFISH structure. This data structure contains key dependent data.
++ * This pointer is used with all other crypt functions.
++ */
++
++TWOFISH *TwoFishInit(char *userkey)
++{ TWOFISH *tfdata;
++ int i,x,m;
++ char tkey[TwoFish_KEY_LENGTH+40];
++
++ tfdata=malloc(sizeof(TWOFISH)); /* allocate the TwoFish structure */
++ if(tfdata!=NULL)
++ { if(*userkey)
++ { strncpy(tkey,userkey,TwoFish_KEY_LENGTH); /* use first 32 chars of user supplied password */
++ tkey[TwoFish_KEY_LENGTH]=0; /* make sure it wasn't more */
++ }
++ else
++ strcpy(tkey,TwoFish_DEFAULT_PW); /* if no key defined, use default password */
++ for(i=0,x=0,m=strlen(tkey);i<TwoFish_KEY_LENGTH;i++) /* copy into data structure */
++ { tfdata->key[i]=tkey[x++]; /* fill the whole keyspace with repeating key. */
++ if(x==m)
++ x=0;
++ }
++
++ if(!TwoFish_MDSready)
++ _TwoFish_PrecomputeMDSmatrix(); /* "Wake Up, Neo" */
++ _TwoFish_MakeSubKeys(tfdata); /* generate subkeys */
++ _TwoFish_ResetCBC(tfdata); /* reset the CBC */
++ tfdata->output=NULL; /* nothing to output yet */
++ tfdata->dontflush=FALSE; /* reset decrypt skip block flag */
++ if(TwoFish_srand)
++ { TwoFish_srand=FALSE;
++ srand(time(NULL));
++ }
++ }
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