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Diffstat (limited to 'config/snort-dev/snortsam-package-code/patches/SnortSam/snortsam-2.8.6.1.diff')
| -rw-r--r-- | config/snort-dev/snortsam-package-code/patches/SnortSam/snortsam-2.8.6.1.diff | 3021 |
1 files changed, 3021 insertions, 0 deletions
diff --git a/config/snort-dev/snortsam-package-code/patches/SnortSam/snortsam-2.8.6.1.diff b/config/snort-dev/snortsam-package-code/patches/SnortSam/snortsam-2.8.6.1.diff new file mode 100644 index 00000000..983165e1 --- /dev/null +++ b/config/snort-dev/snortsam-package-code/patches/SnortSam/snortsam-2.8.6.1.diff @@ -0,0 +1,3021 @@ +Index: snort-2.8.6.1/src/twofish.c +=================================================================== +--- snort-2.8.6.1/src/twofish.c (Revision 0) ++++ snort-2.8.6.1/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)); ++ } ++ } ++ return tfdata; /* return the data pointer */ ++} ++ ++ ++void TwoFishDestroy(TWOFISH *tfdata) ++{ if(tfdata!=NULL) ++ free(tfdata); ++} ++ ++ ++/* en/decryption with CBC mode */ ++unsigned long _TwoFish_CryptRawCBC(char *in,char *out,unsigned long len,bool decrypt,TWOFISH *tfdata) ++{ unsigned long rl; ++ ++ rl=len; /* remember how much data to crypt. */ ++ while(len>TwoFish_BLOCK_SIZE) /* and now we process block by block. */ ++ { _TwoFish_BlockCrypt(in,out,TwoFish_BLOCK_SIZE,decrypt,tfdata); /* de/encrypt it. */ ++ in+=TwoFish_BLOCK_SIZE; /* adjust pointers. */ ++ out+=TwoFish_BLOCK_SIZE; ++ len-=TwoFish_BLOCK_SIZE; ++ } ++ if(len>0) /* if we have less than a block left... */ ++ _TwoFish_BlockCrypt(in,out,len,decrypt,tfdata); /* ...then we de/encrypt that too. */ ++ if(tfdata->qBlockDefined && !tfdata->dontflush) /* in case len was exactly one block... */ ++ _TwoFish_FlushOutput(tfdata->qBlockCrypt,TwoFish_BLOCK_SIZE,tfdata); /* ...we need to write the... */ ++ /* ...remaining bytes of the buffer */ ++ return rl; ++} ++ ++/* en/decryption on one block only */ ++unsigned long _TwoFish_CryptRaw16(char *in,char *out,unsigned long len,bool decrypt,TWOFISH *tfdata) ++{ /* qBlockPlain already zero'ed through ResetCBC */ ++ memcpy(tfdata->qBlockPlain,in,len); /* toss the data into it. */ ++ _TwoFish_BlockCrypt16(tfdata->qBlockPlain,tfdata->qBlockCrypt,decrypt,tfdata); /* encrypt just that block without CBC. */ ++ memcpy(out,tfdata->qBlockCrypt,TwoFish_BLOCK_SIZE); /* and return what we got */ ++ return TwoFish_BLOCK_SIZE; ++} ++ ++/* en/decryption without reset of CBC and output assignment */ ++unsigned long _TwoFish_CryptRaw(char *in,char *out,unsigned long len,bool decrypt,TWOFISH *tfdata) ++{ ++ if(in!=NULL && out!=NULL && len>0 && tfdata!=NULL) /* if we have valid data, then... */ ++ { if(len>TwoFish_BLOCK_SIZE) /* ...check if we have more than one block. */ ++ return _TwoFish_CryptRawCBC(in,out,len,decrypt,tfdata); /* if so, use the CBC routines... */ ++ else ++ return _TwoFish_CryptRaw16(in,out,len,decrypt,tfdata); /* ...otherwise just do one block. */ ++ } ++ return 0; ++} ++ ++ ++/* TwoFish Raw Encryption ++ * ++ * Does not use header, but does use CBC (if more than one block has to be encrypted). ++ * ++ * Input: Pointer to the buffer of the plaintext to be encrypted. ++ * Pointer to the buffer receiving the ciphertext. ++ * The length of the plaintext buffer. ++ * The TwoFish structure. ++ * ++ * Output: The amount of bytes encrypted if successful, otherwise 0. ++ */ ++ ++unsigned long TwoFishEncryptRaw(char *in, ++ char *out, ++ unsigned long len, ++ TWOFISH *tfdata) ++{ _TwoFish_ResetCBC(tfdata); /* reset CBC flag. */ ++ tfdata->output=out; /* output straight into output buffer. */ ++ return _TwoFish_CryptRaw(in,out,len,FALSE,tfdata); /* and go for it. */ ++} ++ ++/* TwoFish Raw Decryption ++ * ++ * Does not use header, but does use CBC (if more than one block has to be decrypted). ++ * ++ * Input: Pointer to the buffer of the ciphertext to be decrypted. ++ * Pointer to the buffer receiving the plaintext. ++ * The length of the ciphertext buffer (at least one cipher block). ++ * The TwoFish structure. ++ * ++ * Output: The amount of bytes decrypted if successful, otherwise 0. ++ */ ++ ++unsigned long TwoFishDecryptRaw(char *in, ++ char *out, ++ unsigned long len, ++ TWOFISH *tfdata) ++{ _TwoFish_ResetCBC(tfdata); /* reset CBC flag. */ ++ tfdata->output=out; /* output straight into output buffer. */ ++ return _TwoFish_CryptRaw(in,out,len,TRUE,tfdata); /* and go for it. */ ++} ++ ++/* TwoFish Free ++ * ++ * Free's the allocated buffer. ++ * ++ * Input: Pointer to the TwoFish structure ++ * ++ * Output: (none) ++ */ ++ ++void TwoFishFree(TWOFISH *tfdata) ++{ if(tfdata->output!=NULL) /* if a valid buffer is present... */ ++ { free(tfdata->output); /* ...then we free it for you... */ ++ tfdata->output=NULL; /* ...and mark as such. */ ++ } ++} ++ ++/* TwoFish Set Output ++ * ++ * If you want to allocate the output buffer yourself, ++ * then you can set it with this function. ++ * ++ * Input: Pointer to your output buffer ++ * Pointer to the TwoFish structure ++ * ++ * Output: (none) ++ */ ++ ++void TwoFishSetOutput(char *outp,TWOFISH *tfdata) ++{ tfdata->output=outp; /* (do we really need a function for this?) */ ++} ++ ++/* TwoFish Alloc ++ * ++ * Allocates enough memory for the output buffer that would be required ++ * ++ * Input: Length of the plaintext. ++ * Boolean flag for BinHex Output. ++ * Pointer to the TwoFish structure. ++ * ++ * Output: Returns a pointer to the memory allocated. ++ */ ++ ++void *TwoFishAlloc(unsigned long len,bool binhex,bool decrypt,TWOFISH *tfdata) ++{ ++/* TwoFishFree(tfdata); */ /* (don't for now) discard whatever was allocated earlier. */ ++ if(decrypt) /* if decrypting... */ ++ { if(binhex) /* ...and input is binhex encoded... */ ++ len/=2; /* ...use half as much for output. */ ++ len-=TwoFish_BLOCK_SIZE; /* Also, subtract the size of the header. */ ++ } ++ else ++ { len+=TwoFish_BLOCK_SIZE; /* the size is just increased by the header... */ ++ if(binhex) ++ len*=2; /* ...and doubled if output is to be binhexed. */ ++ } ++ tfdata->output=malloc(len+TwoFish_BLOCK_SIZE);/* grab some memory...plus some extra (it's running over somewhere, crashes without extra padding) */ ++ ++ return tfdata->output; /* ...and return to caller. */ ++} ++ ++/* bin2hex and hex2bin conversion */ ++void _TwoFish_BinHex(u_int8_t *buf,unsigned long len,bool bintohex) ++{ u_int8_t *pi,*po,c; ++ ++ if(bintohex) ++ { for(pi=buf+len-1,po=buf+(2*len)-1;len>0;pi--,po--,len--) /* let's start from the end of the bin block. */ ++ { c=*pi; /* grab value. */ ++ c&=15; /* use lower 4 bits. */ ++ if(c>9) /* convert to ascii. */ ++ c+=('a'-10); ++ else ++ c+='0'; ++ *po--=c; /* set the lower nibble. */ ++ c=*pi; /* grab value again. */ ++ c>>=4; /* right shift 4 bits. */ ++ c&=15; /* make sure we only have 4 bits. */ ++ if(c>9) /* convert to ascii. */ ++ c+=('a'-10); ++ else ++ c+='0'; ++ *po=c; /* set the higher nibble. */ ++ } /* and keep going. */ ++ } ++ else ++ { for(pi=buf,po=buf;len>0;pi++,po++,len-=2) /* let's start from the beginning of the hex block. */ ++ { c=tolower(*pi++)-'0'; /* grab higher nibble. */ ++ if(c>9) /* convert to value. */ ++ c-=('0'-9); ++ *po=c<<4; /* left shit 4 bits. */ ++ c=tolower(*pi)-'0'; /* grab lower nibble. */ ++ if(c>9) /* convert to value. */ ++ c-=('0'-9); ++ *po|=c; /* and add to value. */ ++ } ++ } ++} ++ ++ ++/* TwoFish Encryption ++ * ++ * Uses header and CBC. If the output area has not been intialized with TwoFishAlloc, ++ * this routine will alloc the memory. In addition, it will include a small 'header' ++ * containing the magic and some salt. That way the decrypt routine can check if the ++ * packet got decrypted successfully, and return 0 instead of garbage. ++ * ++ * Input: Pointer to the buffer of the plaintext to be encrypted. ++ * Pointer to the pointer to the buffer receiving the ciphertext. ++ * The pointer either points to user allocated output buffer space, or to NULL, in which case ++ * this routine will set the pointer to the buffer allocated through the struct. ++ * The length of the plaintext buffer. ++ * Can be -1 if the input is a null terminated string, in which case we'll count for you. ++ * Boolean flag for BinHex Output (if used, output will be twice as large as input). ++ * Note: BinHex conversion overwrites (converts) input buffer! ++ * The TwoFish structure. ++ * ++ * Output: The amount of bytes encrypted if successful, otherwise 0. ++ */ ++ ++unsigned long TwoFishEncrypt(char *in, ++ char **out, ++ signed long len, ++ bool binhex, ++ TWOFISH *tfdata) ++{ unsigned long ilen,olen; ++ ++ ++ if(len== -1) /* if we got -1 for len, we'll assume IN is a... */ ++ ilen=strlen(in); /* ...\0 terminated string and figure len out ourselves... */ ++ else ++ ilen=len; /* ...otherwise we trust you supply a correct length. */ ++ ++ if(in!=NULL && out!=NULL && ilen>0 && tfdata!=NULL) /* if we got usable stuff, we'll do it. */ ++ { if(*out==NULL) /* if OUT points to a NULL pointer... */ ++ *out=TwoFishAlloc(ilen,binhex,FALSE,tfdata); /* ...we'll (re-)allocate buffer space. */ ++ if(*out!=NULL) ++ { tfdata->output=*out; /* set output buffer. */ ++ tfdata->header.salt=rand()*65536+rand(); /* toss in some salt. */ ++ tfdata->header.length[0]= (u_int8_t)(ilen); ++ tfdata->header.length[1]= (u_int8_t)(ilen>>8); ++ tfdata->header.length[2]= (u_int8_t)(ilen>>16); ++ tfdata->header.length[3]= (u_int8_t)(ilen>>24); ++ memcpy(tfdata->header.magic,TwoFish_MAGIC,TwoFish_MAGIC_LEN); /* set the magic. */ ++ olen=TwoFish_BLOCK_SIZE; /* set output counter. */ ++ _TwoFish_ResetCBC(tfdata); /* reset the CBC flag */ ++ _TwoFish_BlockCrypt((u_int8_t *)&(tfdata->header),*out,olen,FALSE,tfdata); /* encrypt first block (without flush on 16 byte boundary). */ ++ olen+=_TwoFish_CryptRawCBC(in,*out+TwoFish_BLOCK_SIZE,ilen,FALSE,tfdata); /* and encrypt the rest (we do not reset the CBC flag). */ ++ if(binhex) /* if binhex... */ ++ { _TwoFish_BinHex(*out,olen,TRUE); /* ...convert output to binhex... */ ++ olen*=2; /* ...and size twice as large. */ ++ } ++ tfdata->output=*out; ++ return olen; ++ } ++ } ++ return 0; ++} ++ ++/* TwoFish Decryption ++ * ++ * Uses header and CBC. If the output area has not been intialized with TwoFishAlloc, ++ * this routine will alloc the memory. In addition, it will check the small 'header' ++ * containing the magic. If magic does not match we return 0. Otherwise we return the ++ * amount of bytes decrypted (should be the same as the length in the header). ++ * ++ * Input: Pointer to the buffer of the ciphertext to be decrypted. ++ * Pointer to the pointer to the buffer receiving the plaintext. ++ * The pointer either points to user allocated output buffer space, or to NULL, in which case ++ * this routine will set the pointer to the buffer allocated through the struct. ++ * The length of the ciphertext buffer. ++ * Can be -1 if the input is a null terminated binhex string, in which case we'll count for you. ++ * Boolean flag for BinHex Input (if used, plaintext will be half as large as input). ++ * Note: BinHex conversion overwrites (converts) input buffer! ++ * The TwoFish structure. ++ * ++ * Output: The amount of bytes decrypted if successful, otherwise 0. ++ */ ++ ++unsigned long TwoFishDecrypt(char *in, ++ char **out, ++ signed long len, ++ bool binhex, ++ TWOFISH *tfdata) ++{ unsigned long ilen,elen,olen; ++ const u_int8_t cmagic[TwoFish_MAGIC_LEN]=TwoFish_MAGIC; ++ u_int8_t *tbuf; ++ ++ ++ ++ if(len== -1) /* if we got -1 for len, we'll assume IN is... */ ++ ilen=strlen(in); /* ...\0 terminated binhex and figure len out ourselves... */ ++ else ++ ilen=len; /* ...otherwise we trust you supply a correct length. */ ++ ++ if(in!=NULL && out!=NULL && ilen>0 && tfdata!=NULL) /* if we got usable stuff, we'll do it. */ ++ { if(*out==NULL) /* if OUT points to a NULL pointer... */ ++ *out=TwoFishAlloc(ilen,binhex,TRUE,tfdata); /* ...we'll (re-)allocate buffer space. */ ++ if(*out!=NULL) ++ { if(binhex) /* if binhex... */ ++ { _TwoFish_BinHex(in,ilen,FALSE); /* ...convert input to values... */ ++ ilen/=2; /* ...and size half as much. */ ++ } ++ _TwoFish_ResetCBC(tfdata); /* reset the CBC flag. */ ++ ++ tbuf=(u_int8_t *)malloc(ilen+TwoFish_BLOCK_SIZE); /* get memory for data and header. */ ++ if(tbuf==NULL) ++ return 0; ++ tfdata->output=tbuf; /* set output to temp buffer. */ ++ ++ olen=_TwoFish_CryptRawCBC(in,tbuf,ilen,TRUE,tfdata)-TwoFish_BLOCK_SIZE; /* decrypt the whole thing. */ ++ memcpy(&(tfdata->header),tbuf,TwoFish_BLOCK_SIZE); /* copy first block into header. */ ++ tfdata->output=*out; ++ for(elen=0;elen<TwoFish_MAGIC_LEN;elen++) /* compare magic. */ ++ if(tfdata->header.magic[elen]!=cmagic[elen]) ++ break; ++ if(elen==TwoFish_MAGIC_LEN) /* if magic matches then... */ ++ { elen=(tfdata->header.length[0]) | ++ (tfdata->header.length[1])<<8 | ++ (tfdata->header.length[2])<<16 | ++ (tfdata->header.length[3])<<24; /* .. we know how much to expect. */ ++ if(elen>olen) /* adjust if necessary. */ ++ elen=olen; ++ memcpy(*out,tbuf+TwoFish_BLOCK_SIZE,elen); /* copy data into intended output. */ ++ free(tbuf); ++ return elen; ++ } ++ free(tbuf); ++ } ++ } ++ return 0; ++} ++ ++void _TwoFish_PrecomputeMDSmatrix(void) /* precompute the TwoFish_MDS matrix */ ++{ u_int32_t m1[2]; ++ u_int32_t mX[2]; ++ u_int32_t mY[2]; ++ u_int32_t i, j; ++ ++ for (i = 0; i < 256; i++) ++ { j = TwoFish_P[0][i] & 0xFF; /* compute all the matrix elements */ ++ m1[0] = j; ++ mX[0] = TwoFish_Mx_X( j ) & 0xFF; ++ mY[0] = TwoFish_Mx_Y( j ) & 0xFF; ++ ++ j = TwoFish_P[1][i] & 0xFF; ++ m1[1] = j; ++ mX[1] = TwoFish_Mx_X( j ) & 0xFF; ++ mY[1] = TwoFish_Mx_Y( j ) & 0xFF; ++ ++ TwoFish_MDS[0][i] = m1[TwoFish_P_00] | /* fill matrix w/ above elements */ ++ mX[TwoFish_P_00] << 8 | ++ mY[TwoFish_P_00] << 16 | ++ mY[TwoFish_P_00] << 24; ++ TwoFish_MDS[1][i] = mY[TwoFish_P_10] | ++ mY[TwoFish_P_10] << 8 | ++ mX[TwoFish_P_10] << 16 | ++ m1[TwoFish_P_10] << 24; ++ TwoFish_MDS[2][i] = mX[TwoFish_P_20] | ++ mY[TwoFish_P_20] << 8 | ++ m1[TwoFish_P_20] << 16 | ++ mY[TwoFish_P_20] << 24; ++ TwoFish_MDS[3][i] = mX[TwoFish_P_30] | ++ m1[TwoFish_P_30] << 8 | ++ mY[TwoFish_P_30] << 16 | ++ mX[TwoFish_P_30] << 24; ++ } ++ TwoFish_MDSready=TRUE; ++} ++ ++ ++void _TwoFish_MakeSubKeys(TWOFISH *tfdata) /* Expand a user-supplied key material into a session key. */ ++{ u_int32_t k64Cnt = TwoFish_KEY_LENGTH / 8; ++ u_int32_t k32e[4]; /* even 32-bit entities */ ++ u_int32_t k32o[4]; /* odd 32-bit entities */ ++ u_int32_t sBoxKey[4]; ++ u_int32_t offset,i,j; ++ u_int32_t A, B, q=0; ++ u_int32_t k0,k1,k2,k3; ++ u_int32_t b0,b1,b2,b3; ++ ++ /* split user key material into even and odd 32-bit entities and */ ++ /* compute S-box keys using (12, 8) Reed-Solomon code over GF(256) */ ++ ++ ++ for (offset=0,i=0,j=k64Cnt-1;i<4 && offset<TwoFish_KEY_LENGTH;i++,j--) ++ { k32e[i] = tfdata->key[offset++]; ++ k32e[i]|= tfdata->key[offset++]<<8; ++ k32e[i]|= tfdata->key[offset++]<<16; ++ k32e[i]|= tfdata->key[offset++]<<24; ++ k32o[i] = tfdata->key[offset++]; ++ k32o[i]|= tfdata->key[offset++]<<8; ++ k32o[i]|= tfdata->key[offset++]<<16; ++ k32o[i]|= tfdata->key[offset++]<<24; ++ sBoxKey[j] = _TwoFish_RS_MDS_Encode( k32e[i], k32o[i] ); /* reverse order */ ++ } ++ ++ /* compute the round decryption subkeys for PHT. these same subkeys */ ++ /* will be used in encryption but will be applied in reverse order. */ ++ i=0; ++ while(i < TwoFish_TOTAL_SUBKEYS) ++ { A = _TwoFish_F32( k64Cnt, q, k32e ); /* A uses even key entities */ ++ q += TwoFish_SK_BUMP; ++ ++ B = _TwoFish_F32( k64Cnt, q, k32o ); /* B uses odd key entities */ ++ q += TwoFish_SK_BUMP; ++ ++ B = B << 8 | B >> 24; ++ ++ A += B; ++ tfdata->subKeys[i++] = A; /* combine with a PHT */ ++ ++ A += B; ++ tfdata->subKeys[i++] = A << TwoFish_SK_ROTL | A >> (32-TwoFish_SK_ROTL); ++ } ++ ++ /* fully expand the table for speed */ ++ k0 = sBoxKey[0]; ++ k1 = sBoxKey[1]; ++ k2 = sBoxKey[2]; ++ k3 = sBoxKey[3]; ++ ++ for (i = 0; i < 256; i++) ++ { b0 = b1 = b2 = b3 = i; ++ switch (k64Cnt & 3) ++ { case 1: /* 64-bit keys */ ++ tfdata->sBox[ 2*i ] = TwoFish_MDS[0][(TwoFish_P[TwoFish_P_01][b0]) ^ TwoFish_b0(k0)]; ++ tfdata->sBox[ 2*i+1] = TwoFish_MDS[1][(TwoFish_P[TwoFish_P_11][b1]) ^ TwoFish_b1(k0)]; ++ tfdata->sBox[0x200+2*i ] = TwoFish_MDS[2][(TwoFish_P[TwoFish_P_21][b2]) ^ TwoFish_b2(k0)]; ++ tfdata->sBox[0x200+2*i+1] = TwoFish_MDS[3][(TwoFish_P[TwoFish_P_31][b3]) ^ TwoFish_b3(k0)]; ++ break; ++ case 0: /* 256-bit keys (same as 4) */ ++ b0 = (TwoFish_P[TwoFish_P_04][b0]) ^ TwoFish_b0(k3); ++ b1 = (TwoFish_P[TwoFish_P_14][b1]) ^ TwoFish_b1(k3); ++ b2 = (TwoFish_P[TwoFish_P_24][b2]) ^ TwoFish_b2(k3); ++ b3 = (TwoFish_P[TwoFish_P_34][b3]) ^ TwoFish_b3(k3); ++ case 3: /* 192-bit keys */ ++ b0 = (TwoFish_P[TwoFish_P_03][b0]) ^ TwoFish_b0(k2); ++ b1 = (TwoFish_P[TwoFish_P_13][b1]) ^ TwoFish_b1(k2); ++ b2 = (TwoFish_P[TwoFish_P_23][b2]) ^ TwoFish_b2(k2); ++ b3 = (TwoFish_P[TwoFish_P_33][b3]) ^ TwoFish_b3(k2); ++ case 2: /* 128-bit keys */ ++ tfdata->sBox[ 2*i ]= ++ TwoFish_MDS[0][(TwoFish_P[TwoFish_P_01][(TwoFish_P[TwoFish_P_02][b0]) ^ ++ TwoFish_b0(k1)]) ^ TwoFish_b0(k0)]; ++ ++ tfdata->sBox[ 2*i+1]= ++ TwoFish_MDS[1][(TwoFish_P[TwoFish_P_11][(TwoFish_P[TwoFish_P_12][b1]) ^ ++ TwoFish_b1(k1)]) ^ TwoFish_b1(k0)]; ++ ++ tfdata->sBox[0x200+2*i ]= ++ TwoFish_MDS[2][(TwoFish_P[TwoFish_P_21][(TwoFish_P[TwoFish_P_22][b2]) ^ ++ TwoFish_b2(k1)]) ^ TwoFish_b2(k0)]; ++ ++ tfdata->sBox[0x200+2*i+1]= ++ TwoFish_MDS[3][(TwoFish_P[TwoFish_P_31][(TwoFish_P[TwoFish_P_32][b3]) ^ ++ TwoFish_b3(k1)]) ^ TwoFish_b3(k0)]; ++ } ++ } ++} ++ ++ ++/** ++ * Encrypt or decrypt exactly one block of plaintext in CBC mode. ++ * Use "ciphertext stealing" technique described on pg. 196 ++ * of "Applied Cryptography" to encrypt the final partial ++ * (i.e. <16 byte) block if necessary. ++ * ++ * jojo: the "ciphertext stealing" requires we read ahead and have ++ * special handling for the last two blocks. Because of this, the ++ * output from the TwoFish algorithm is handled internally here. ++ * It would be better to have a higher level handle this as well as ++ * CBC mode. Unfortunately, I've mixed the two together, which is ++ * pretty crappy... The Java version separates these out correctly. ++ * ++ * fknobbe: I have reduced the CBC mode to work on memory buffer only. ++ * Higher routines should use an intermediate buffer and handle ++ * their output seperately (mainly so the data can be flushed ++ * in one chunk, not seperate 16 byte blocks...) ++ * ++ * @param in The plaintext. ++ * @param out The ciphertext ++ * @param size how much to encrypt ++ * @param tfdata: Pointer to the global data structure containing session keys. ++ * @return none ++ */ ++void _TwoFish_BlockCrypt(u_int8_t *in,u_int8_t *out,unsigned long size,int decrypt,TWOFISH *tfdata) ++{ u_int8_t PnMinusOne[TwoFish_BLOCK_SIZE]; ++ u_int8_t CnMinusOne[TwoFish_BLOCK_SIZE]; ++ u_int8_t CBCplusCprime[TwoFish_BLOCK_SIZE]; ++ u_int8_t Pn[TwoFish_BLOCK_SIZE]; ++ u_int8_t *p,*pout; ++ unsigned long i; ++ ++ /* here is where we implement CBC mode and cipher block stealing */ ++ if(size==TwoFish_BLOCK_SIZE) ++ { /* if we are encrypting, CBC means we XOR the plain text block with the */ ++ /* previous cipher text block before encrypting */ ++ if(!decrypt && tfdata->qBlockDefined) ++ { for(p=in,i=0;i<TwoFish_BLOCK_SIZE;i++,p++) ++ Pn[i]=*p ^ tfdata->qBlockCrypt[i]; /* FK: I'm copying the xor'ed input into Pn... */ ++ } ++ else ++ memcpy(Pn,in,TwoFish_BLOCK_SIZE); /* FK: same here. we work of Pn all the time. */ ++ ++ /* TwoFish block level encryption or decryption */ ++ _TwoFish_BlockCrypt16(Pn,out,decrypt,tfdata); ++ ++ /* if we are decrypting, CBC means we XOR the result of the decryption */ ++ /* with the previous cipher text block to get the resulting plain text */ ++ if(decrypt && tfdata->qBlockDefined) ++ { for (p=out,i=0;i<TwoFish_BLOCK_SIZE;i++,p++) ++ *p^=tfdata->qBlockPlain[i]; ++ } ++ ++ /* save the input and output blocks, since CBC needs these for XOR */ ++ /* operations */ ++ _TwoFish_qBlockPush(Pn,out,tfdata); ++ } ++ else ++ { /* cipher block stealing, we are at Pn, */ ++ /* but since Cn-1 must now be replaced with CnC' */ ++ /* we pop it off, and recalculate Cn-1 */ ++ ++ if(decrypt) ++ { /* We are on an odd block, and had to do cipher block stealing, */ ++ /* so the PnMinusOne has to be derived differently. */ ++ ++ /* First we decrypt it into CBC and C' */ ++ _TwoFish_qBlockPop(CnMinusOne,PnMinusOne,tfdata); ++ _TwoFish_BlockCrypt16(CnMinusOne,CBCplusCprime,decrypt,tfdata); ++ ++ /* we then xor the first few bytes with the "in" bytes (Cn) */ ++ /* to recover Pn, which we put in out */ ++ for(p=in,pout=out,i=0;i<size;i++,p++,pout++) ++ *pout=*p ^ CBCplusCprime[i]; ++ ++ /* We now recover the original CnMinusOne, which consists of */ ++ /* the first "size" bytes of "in" data, followed by the */ ++ /* "Cprime" portion of CBCplusCprime */ ++ for(p=in,i=0;i<size;i++,p++) ++ CnMinusOne[i]=*p; ++ for(;i<TwoFish_BLOCK_SIZE;i++) ++ CnMinusOne[i]=CBCplusCprime[i]; ++ ++ /* we now decrypt CnMinusOne to get PnMinusOne xored with Cn-2 */ ++ _TwoFish_BlockCrypt16(CnMinusOne,PnMinusOne,decrypt,tfdata); ++ ++ for(i=0;i<TwoFish_BLOCK_SIZE;i++) ++ PnMinusOne[i]=PnMinusOne[i] ^ tfdata->prevCipher[i]; ++ ++ /* So at this point, out has PnMinusOne */ ++ _TwoFish_qBlockPush(CnMinusOne,PnMinusOne,tfdata); ++ _TwoFish_FlushOutput(tfdata->qBlockCrypt,TwoFish_BLOCK_SIZE,tfdata); ++ _TwoFish_FlushOutput(out,size,tfdata); ++ } ++ else ++ { _TwoFish_qBlockPop(PnMinusOne,CnMinusOne,tfdata); ++ memset(Pn,0,TwoFish_BLOCK_SIZE); ++ memcpy(Pn,in,size); ++ for(i=0;i<TwoFish_BLOCK_SIZE;i++) ++ Pn[i]^=CnMinusOne[i]; ++ _TwoFish_BlockCrypt16(Pn,out,decrypt,tfdata); ++ _TwoFish_qBlockPush(Pn,out,tfdata); /* now we officially have Cn-1 */ ++ _TwoFish_FlushOutput(tfdata->qBlockCrypt,TwoFish_BLOCK_SIZE,tfdata); ++ _TwoFish_FlushOutput(CnMinusOne,size,tfdata); /* old Cn-1 becomes new partial Cn */ ++ } ++ tfdata->qBlockDefined=FALSE; ++ } ++} ++ ++void _TwoFish_qBlockPush(u_int8_t *p,u_int8_t *c,TWOFISH *tfdata) ++{ if(tfdata->qBlockDefined) ++ _TwoFish_FlushOutput(tfdata->qBlockCrypt,TwoFish_BLOCK_SIZE,tfdata); ++ memcpy(tfdata->prevCipher,tfdata->qBlockPlain,TwoFish_BLOCK_SIZE); ++ memcpy(tfdata->qBlockPlain,p,TwoFish_BLOCK_SIZE); ++ memcpy(tfdata->qBlockCrypt,c,TwoFish_BLOCK_SIZE); ++ tfdata->qBlockDefined=TRUE; ++} ++ ++void _TwoFish_qBlockPop(u_int8_t *p,u_int8_t *c,TWOFISH *tfdata) ++{ memcpy(p,tfdata->qBlockPlain,TwoFish_BLOCK_SIZE ); ++ memcpy(c,tfdata->qBlockCrypt,TwoFish_BLOCK_SIZE ); ++ tfdata->qBlockDefined=FALSE; ++} ++ ++/* Reset's the CBC flag and zero's PrevCipher (through qBlockPlain) (important) */ ++void _TwoFish_ResetCBC(TWOFISH *tfdata) ++{ tfdata->qBlockDefined=FALSE; ++ memset(tfdata->qBlockPlain,0,TwoFish_BLOCK_SIZE); ++} ++ ++void _TwoFish_FlushOutput(u_int8_t *b,unsigned long len,TWOFISH *tfdata) ++{ unsigned long i; ++ ++ for(i=0;i<len && !tfdata->dontflush;i++) ++ *tfdata->output++ = *b++; ++ tfdata->dontflush=FALSE; ++} ++ ++void _TwoFish_BlockCrypt16(u_int8_t *in,u_int8_t *out,bool decrypt,TWOFISH *tfdata) ++{ u_int32_t x0,x1,x2,x3; ++ u_int32_t k,t0,t1,R; ++ ++ ++ x0=*in++; ++ x0|=(*in++ << 8 ); ++ x0|=(*in++ << 16); ++ x0|=(*in++ << 24); ++ x1=*in++; ++ x1|=(*in++ << 8 ); ++ x1|=(*in++ << 16); ++ x1|=(*in++ << 24); ++ x2=*in++; ++ x2|=(*in++ << 8 ); ++ x2|=(*in++ << 16); ++ x2|=(*in++ << 24); ++ x3=*in++; ++ x3|=(*in++ << 8 ); ++ x3|=(*in++ << 16); ++ x3|=(*in++ << 24); ++ ++ if(decrypt) ++ { x0 ^= tfdata->subKeys[4]; /* swap input and output whitening keys when decrypting */ ++ x1 ^= tfdata->subKeys[5]; ++ x2 ^= tfdata->subKeys[6]; ++ x3 ^= tfdata->subKeys[7]; ++ ++ k = 7+(TwoFish_ROUNDS*2); ++ for (R = 0; R < TwoFish_ROUNDS; R += 2) ++ { t0 = _TwoFish_Fe320( tfdata->sBox, x0); ++ t1 = _TwoFish_Fe323( tfdata->sBox, x1); ++ x3 ^= t0 + (t1<<1) + tfdata->subKeys[k--]; ++ x3 = x3 >> 1 | x3 << 31; ++ x2 = x2 << 1 | x2 >> 31; ++ x2 ^= t0 + t1 + tfdata->subKeys[k--]; ++ ++ t0 = _TwoFish_Fe320( tfdata->sBox, x2); ++ t1 = _TwoFish_Fe323( tfdata->sBox, x3); ++ x1 ^= t0 + (t1<<1) + tfdata->subKeys[k--]; ++ x1 = x1 >> 1 | x1 << 31; ++ x0 = x0 << 1 | x0 >> 31; ++ x0 ^= t0 + t1 + tfdata->subKeys[k--]; ++ } ++ ++ x2 ^= tfdata->subKeys[0]; ++ x3 ^= tfdata->subKeys[1]; ++ x0 ^= tfdata->subKeys[2]; ++ x1 ^= tfdata->subKeys[3]; ++ } ++ else ++ { x0 ^= tfdata->subKeys[0]; ++ x1 ^= tfdata->subKeys[1]; ++ x2 ^= tfdata->subKeys[2]; ++ x3 ^= tfdata->subKeys[3]; ++ ++ k = 8; ++ for (R = 0; R < TwoFish_ROUNDS; R += 2) ++ { t0 = _TwoFish_Fe320( tfdata->sBox, x0); ++ t1 = _TwoFish_Fe323( tfdata->sBox, x1); ++ x2 ^= t0 + t1 + tfdata->subKeys[k++]; ++ x2 = x2 >> 1 | x2 << 31; ++ x3 = x3 << 1 | x3 >> 31; ++ x3 ^= t0 + (t1<<1) + tfdata->subKeys[k++]; ++ ++ t0 = _TwoFish_Fe320( tfdata->sBox, x2); ++ t1 = _TwoFish_Fe323( tfdata->sBox, x3); ++ x0 ^= t0 + t1 + tfdata->subKeys[k++]; ++ x0 = x0 >> 1 | x0 << 31; ++ x1 = x1 << 1 | x1 >> 31; ++ x1 ^= t0 + (t1<<1) + tfdata->subKeys[k++]; ++ } ++ ++ x2 ^= tfdata->subKeys[4]; ++ x3 ^= tfdata->subKeys[5]; ++ x0 ^= tfdata->subKeys[6]; ++ x1 ^= tfdata->subKeys[7]; ++ } ++ ++ *out++ = (u_int8_t)(x2 ); ++ *out++ = (u_int8_t)(x2 >> 8); ++ *out++ = (u_int8_t)(x2 >> 16); ++ *out++ = (u_int8_t)(x2 >> 24); ++ ++ *out++ = (u_int8_t)(x3 ); ++ *out++ = (u_int8_t)(x3 >> 8); ++ *out++ = (u_int8_t)(x3 >> 16); ++ *out++ = (u_int8_t)(x3 >> 24); ++ ++ *out++ = (u_int8_t)(x0 ); ++ *out++ = (u_int8_t)(x0 >> 8); ++ *out++ = (u_int8_t)(x0 >> 16); ++ *out++ = (u_int8_t)(x0 >> 24); ++ ++ *out++ = (u_int8_t)(x1 ); ++ *out++ = (u_int8_t)(x1 >> 8); ++ *out++ = (u_int8_t)(x1 >> 16); ++ *out++ = (u_int8_t)(x1 >> 24); ++} ++ ++/** ++ * Use (12, 8) Reed-Solomon code over GF(256) to produce a key S-box ++ * 32-bit entity from two key material 32-bit entities. ++ * ++ * @param k0 1st 32-bit entity. ++ * @param k1 2nd 32-bit entity. ++ * @return Remainder polynomial generated using RS code ++ */ ++u_int32_t _TwoFish_RS_MDS_Encode(u_int32_t k0,u_int32_t k1) ++{ u_int32_t i,r; ++ ++ for(r=k1,i=0;i<4;i++) /* shift 1 byte at a time */ ++ TwoFish_RS_rem(r); ++ r ^= k0; ++ for(i=0;i<4;i++) ++ TwoFish_RS_rem(r); ++ ++ return r; ++} ++ ++u_int32_t _TwoFish_F32(u_int32_t k64Cnt,u_int32_t x,u_int32_t *k32) ++{ u_int8_t b0,b1,b2,b3; ++ u_int32_t k0,k1,k2,k3,result = 0; ++ ++ b0=TwoFish_b0(x); ++ b1=TwoFish_b1(x); ++ b2=TwoFish_b2(x); ++ b3=TwoFish_b3(x); ++ k0=k32[0]; ++ k1=k32[1]; ++ k2=k32[2]; ++ k3=k32[3]; ++ ++ switch (k64Cnt & 3) ++ { case 1: /* 64-bit keys */ ++ result = ++ TwoFish_MDS[0][(TwoFish_P[TwoFish_P_01][b0] & 0xFF) ^ TwoFish_b0(k0)] ^ ++ TwoFish_MDS[1][(TwoFish_P[TwoFish_P_11][b1] & 0xFF) ^ TwoFish_b1(k0)] ^ ++ TwoFish_MDS[2][(TwoFish_P[TwoFish_P_21][b2] & 0xFF) ^ TwoFish_b2(k0)] ^ ++ TwoFish_MDS[3][(TwoFish_P[TwoFish_P_31][b3] & 0xFF) ^ TwoFish_b3(k0)]; ++ break; ++ case 0: /* 256-bit keys (same as 4) */ ++ b0 = (TwoFish_P[TwoFish_P_04][b0] & 0xFF) ^ TwoFish_b0(k3); ++ b1 = (TwoFish_P[TwoFish_P_14][b1] & 0xFF) ^ TwoFish_b1(k3); ++ b2 = (TwoFish_P[TwoFish_P_24][b2] & 0xFF) ^ TwoFish_b2(k3); ++ b3 = (TwoFish_P[TwoFish_P_34][b3] & 0xFF) ^ TwoFish_b3(k3); ++ ++ case 3: /* 192-bit keys */ ++ b0 = (TwoFish_P[TwoFish_P_03][b0] & 0xFF) ^ TwoFish_b0(k2); ++ b1 = (TwoFish_P[TwoFish_P_13][b1] & 0xFF) ^ TwoFish_b1(k2); ++ b2 = (TwoFish_P[TwoFish_P_23][b2] & 0xFF) ^ TwoFish_b2(k2); ++ b3 = (TwoFish_P[TwoFish_P_33][b3] & 0xFF) ^ TwoFish_b3(k2); ++ case 2: /* 128-bit keys (optimize for this case) */ ++ result = ++ TwoFish_MDS[0][(TwoFish_P[TwoFish_P_01][(TwoFish_P[TwoFish_P_02][b0] & 0xFF) ^ TwoFish_b0(k1)] & 0xFF) ^ TwoFish_b0(k0)] ^ ++ TwoFish_MDS[1][(TwoFish_P[TwoFish_P_11][(TwoFish_P[TwoFish_P_12][b1] & 0xFF) ^ TwoFish_b1(k1)] & 0xFF) ^ TwoFish_b1(k0)] ^ ++ TwoFish_MDS[2][(TwoFish_P[TwoFish_P_21][(TwoFish_P[TwoFish_P_22][b2] & 0xFF) ^ TwoFish_b2(k1)] & 0xFF) ^ TwoFish_b2(k0)] ^ ++ TwoFish_MDS[3][(TwoFish_P[TwoFish_P_31][(TwoFish_P[TwoFish_P_32][b3] & 0xFF) ^ TwoFish_b3(k1)] & 0xFF) ^ TwoFish_b3(k0)]; ++ break; ++ } ++ return result; ++} ++ ++u_int32_t _TwoFish_Fe320(u_int32_t *lsBox,u_int32_t x) ++{ return lsBox[ TwoFish_b0(x)<<1 ]^ ++ lsBox[ ((TwoFish_b1(x)<<1)|1)]^ ++ lsBox[0x200+ (TwoFish_b2(x)<<1) ]^ ++ lsBox[0x200+((TwoFish_b3(x)<<1)|1)]; ++} ++ ++u_int32_t _TwoFish_Fe323(u_int32_t *lsBox,u_int32_t x) ++{ return lsBox[ (TwoFish_b3(x)<<1) ]^ ++ lsBox[ ((TwoFish_b0(x)<<1)|1)]^ ++ lsBox[0x200+ (TwoFish_b1(x)<<1) ]^ ++ lsBox[0x200+((TwoFish_b2(x)<<1)|1)]; ++} ++ ++u_int32_t _TwoFish_Fe32(u_int32_t *lsBox,u_int32_t x,u_int32_t R) ++{ return lsBox[ 2*TwoFish__b(x,R ) ]^ ++ lsBox[ 2*TwoFish__b(x,R+1)+1]^ ++ lsBox[0x200+2*TwoFish__b(x,R+2) ]^ ++ lsBox[0x200+2*TwoFish__b(x,R+3)+1]; ++} ++ ++ ++#endif + +Index: snort-2.8.6.1/src/twofish.h +=================================================================== +--- snort-2.8.6.1/src/twofish.h (Revision 0) ++++ snort-2.8.6.1/src/twofish.h (Revision 3) +@@ -0,0 +1,276 @@ ++/* $Id: twofish.h,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_HEADER__ ++#define __TWOFISH_LIBRARY_HEADER__ ++ ++#ifndef FALSE ++#define FALSE 0 ++#endif ++#ifndef TRUE ++#define TRUE !FALSE ++#endif ++#ifndef bool ++#define bool int ++#endif ++ ++ ++/* Constants */ ++ ++#define TwoFish_DEFAULT_PW "SnortHas2FishEncryptionRoutines!" /* default password (not more than 32 chars) */ ++#define TwoFish_MAGIC "TwoFish" /* to indentify a successful decryption */ ++ ++enum ++{ TwoFish_KEY_SIZE = 256, /* Valid values: 64, 128, 192, 256 */ ++ /* User 256, other key sizes have not been tested. */ ++ /* (But should work. I substituted as much as */ ++ /* I could with this define.) */ ++ TwoFish_ROUNDS = 16, ++ TwoFish_BLOCK_SIZE = 16, /* bytes in a data-block */ ++ TwoFish_KEY_LENGTH = TwoFish_KEY_SIZE/8, /* 32= 256-bit key */ ++ TwoFish_TOTAL_SUBKEYS = 4+4+2*TwoFish_ROUNDS, ++ TwoFish_MAGIC_LEN = TwoFish_BLOCK_SIZE-8, ++ TwoFish_SK_BUMP = 0x01010101, ++ TwoFish_SK_ROTL = 9, ++ TwoFish_P_00 = 1, ++ TwoFish_P_01 = 0, ++ TwoFish_P_02 = 0, ++ TwoFish_P_03 = TwoFish_P_01 ^ 1, ++ TwoFish_P_04 = 1, ++ TwoFish_P_10 = 0, ++ TwoFish_P_11 = 0, ++ TwoFish_P_12 = 1, ++ TwoFish_P_13 = TwoFish_P_11 ^ 1, ++ TwoFish_P_14 = 0, ++ TwoFish_P_20 = 1, ++ TwoFish_P_21 = 1, ++ TwoFish_P_22 = 0, ++ TwoFish_P_23 = TwoFish_P_21 ^ 1, ++ TwoFish_P_24 = 0, ++ TwoFish_P_30 = 0, ++ TwoFish_P_31 = 1, ++ TwoFish_P_32 = 1, ++ TwoFish_P_33 = TwoFish_P_31 ^ 1, ++ TwoFish_P_34 = 1, ++ TwoFish_GF256_FDBK = 0x169, ++ TwoFish_GF256_FDBK_2 = 0x169 / 2, ++ TwoFish_GF256_FDBK_4 = 0x169 / 4, ++ TwoFish_RS_GF_FDBK = 0x14D, /* field generator */ ++ TwoFish_MDS_GF_FDBK = 0x169 /* primitive polynomial for GF(256) */ ++}; ++ ++ ++/* Global data structure for callers */ ++ ++typedef struct ++{ u_int32_t sBox[4 * 256]; /* Key dependent S-box */ ++ u_int32_t subKeys[TwoFish_TOTAL_SUBKEYS]; /* Subkeys */ ++ u_int8_t key[TwoFish_KEY_LENGTH]; /* Encryption Key */ ++ u_int8_t *output; /* Pointer to output buffer */ ++ u_int8_t qBlockPlain[TwoFish_BLOCK_SIZE]; /* Used by CBC */ ++ u_int8_t qBlockCrypt[TwoFish_BLOCK_SIZE]; ++ u_int8_t prevCipher[TwoFish_BLOCK_SIZE]; ++ struct /* Header for crypt functions. Has to be at least one block long. */ ++ { u_int32_t salt; /* Random salt in first block (will salt the rest through CBC) */ ++ u_int8_t length[4]; /* The amount of data following the header */ ++ u_int8_t magic[TwoFish_MAGIC_LEN]; /* Magic to identify successful decryption */ ++ } header; ++ bool qBlockDefined; ++ bool dontflush; ++} TWOFISH; ++ ++#ifndef __TWOFISH_LIBRARY_SOURCE__ ++ ++extern bool TwoFish_srand; /* if set to TRUE (default), first call of TwoFishInit will seed rand(); */ ++ /* call of TwoFishInit */ ++#endif ++ ++ ++/**** Public Functions ****/ ++ ++/* 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 Destroy ++ * ++ * Nothing else but a free... ++ * ++ * Input: Pointer to the TwoFish structure. ++ * ++ */ ++void TwoFishDestroy(TWOFISH *tfdata); ++ ++ ++/* TwoFish Alloc ++ * ++ * Allocates enough memory for the output buffer as required. ++ * ++ * Input: Length of the plaintext. ++ * Boolean flag for BinHex Output. ++ * Pointer to the TwoFish structure. ++ * ++ * Output: Returns a pointer to the memory allocated. ++ */ ++void *TwoFishAlloc(unsigned long len,bool binhex,bool decrypt,TWOFISH *tfdata); ++ ++ ++/* TwoFish Free ++ * ++ * Free's the allocated buffer. ++ * ++ * Input: Pointer to the TwoFish structure ++ * ++ * Output: (none) ++ */ ++void TwoFishFree(TWOFISH *tfdata); ++ ++ ++/* TwoFish Set Output ++ * ++ * If you want to allocate the output buffer yourself, ++ * then you can set it with this function. ++ * ++ * Input: Pointer to your output buffer ++ * Pointer to the TwoFish structure ++ * ++ * Output: (none) ++ */ ++void TwoFishSetOutput(char *outp,TWOFISH *tfdata); ++ ++ ++/* TwoFish Raw Encryption ++ * ++ * Does not use header, but does use CBC (if more than one block has to be encrypted). ++ * ++ * Input: Pointer to the buffer of the plaintext to be encrypted. ++ * Pointer to the buffer receiving the ciphertext. ++ * The length of the plaintext buffer. ++ * The TwoFish structure. ++ * ++ * Output: The amount of bytes encrypted if successful, otherwise 0. ++ */ ++unsigned long TwoFishEncryptRaw(char *in,char *out,unsigned long len,TWOFISH *tfdata); ++ ++/* TwoFish Raw Decryption ++ * ++ * Does not use header, but does use CBC (if more than one block has to be decrypted). ++ * ++ * Input: Pointer to the buffer of the ciphertext to be decrypted. ++ * Pointer to the buffer receiving the plaintext. ++ * The length of the ciphertext buffer (at least one cipher block). ++ * The TwoFish structure. ++ * ++ * Output: The amount of bytes decrypted if successful, otherwise 0. ++ */ ++unsigned long TwoFishDecryptRaw(char *in,char *out,unsigned long len,TWOFISH *tfdata); ++ ++ ++/* TwoFish Encryption ++ * ++ * Uses header and CBC. If the output area has not been intialized with TwoFishAlloc, ++ * this routine will alloc the memory. In addition, it will include a small 'header' ++ * containing the magic and some salt. That way the decrypt routine can check if the ++ * packet got decrypted successfully, and return 0 instead of garbage. ++ * ++ * Input: Pointer to the buffer of the plaintext to be encrypted. ++ * Pointer to the pointer to the buffer receiving the ciphertext. ++ * The pointer either points to user allocated output buffer space, or to NULL, in which case ++ * this routine will set the pointer to the buffer allocated through the struct. ++ * The length of the plaintext buffer. ++ * Can be -1 if the input is a null terminated string, in which case we'll count for you. ++ * Boolean flag for BinHex Output (if used, output will be twice as large as input). ++ * Note: BinHex conversion overwrites (converts) input buffer! ++ * The TwoFish structure. ++ * ++ * Output: The amount of bytes encrypted if successful, otherwise 0. ++ */ ++unsigned long TwoFishEncrypt(char *in,char **out,signed long len,bool binhex,TWOFISH *tfdata); ++ ++ ++/* TwoFish Decryption ++ * ++ * Uses header and CBC. If the output area has not been intialized with TwoFishAlloc, ++ * this routine will alloc the memory. In addition, it will check the small 'header' ++ * containing the magic. If magic does not match we return 0. Otherwise we return the ++ * amount of bytes decrypted (should be the same as the length in the header). ++ * ++ * Input: Pointer to the buffer of the ciphertext to be decrypted. ++ * Pointer to the pointer to the buffer receiving the plaintext. ++ * The pointer either points to user allocated output buffer space, or to NULL, in which case ++ * this routine will set the pointer to the buffer allocated through the struct. ++ * The length of the ciphertext buffer. ++ * Can be -1 if the input is a null terminated binhex string, in which case we'll count for you. ++ * Boolean flag for BinHex Input (if used, plaintext will be half as large as input). ++ * Note: BinHex conversion overwrites (converts) input buffer! ++ * The TwoFish structure. ++ * ++ * Output: The amount of bytes decrypted if successful, otherwise 0. ++ */ ++unsigned long TwoFishDecrypt(char *in,char **out,signed long len,bool binhex,TWOFISH *tfdata); ++ ++ ++/**** Private Functions ****/ ++ ++u_int8_t TwoFish__b(u_int32_t x,int n); ++void _TwoFish_BinHex(u_int8_t *buf,unsigned long len,bool bintohex); ++unsigned long _TwoFish_CryptRawCBC(char *in,char *out,unsigned long len,bool decrypt,TWOFISH *tfdata); ++unsigned long _TwoFish_CryptRaw16(char *in,char *out,unsigned long len,bool decrypt,TWOFISH *tfdata); ++unsigned long _TwoFish_CryptRaw(char *in,char *out,unsigned long len,bool decrypt,TWOFISH *tfdata); ++void _TwoFish_PrecomputeMDSmatrix(void); ++void _TwoFish_MakeSubKeys(TWOFISH *tfdata); ++void _TwoFish_qBlockPush(u_int8_t *p,u_int8_t *c,TWOFISH *tfdata); ++void _TwoFish_qBlockPop(u_int8_t *p,u_int8_t *c,TWOFISH *tfdata); ++void _TwoFish_ResetCBC(TWOFISH *tfdata); ++void _TwoFish_FlushOutput(u_int8_t *b,unsigned long len,TWOFISH *tfdata); ++void _TwoFish_BlockCrypt(u_int8_t *in,u_int8_t *out,unsigned long size,int decrypt,TWOFISH *tfdata); ++void _TwoFish_BlockCrypt16(u_int8_t *in,u_int8_t *out,bool decrypt,TWOFISH *tfdata); ++u_int32_t _TwoFish_RS_MDS_Encode(u_int32_t k0,u_int32_t k1); ++u_int32_t _TwoFish_F32(u_int32_t k64Cnt,u_int32_t x,u_int32_t *k32); ++u_int32_t _TwoFish_Fe320(u_int32_t *lsBox,u_int32_t x); ++u_int32_t _TwoFish_Fe323(u_int32_t *lsBox,u_int32_t x); ++u_int32_t _TwoFish_Fe32(u_int32_t *lsBox,u_int32_t x,u_int32_t R); ++ ++ ++#endif + +Index: snort-2.8.6.1/src/plugin_enum.h +=================================================================== +--- snort-2.8.6.1/src/plugin_enum.h (Revision 1) ++++ snort-2.8.6.1/src/plugin_enum.h (Revision 3) +@@ -60,6 +60,7 @@ + PLUGIN_URILEN_CHECK, + PLUGIN_DYNAMIC, + PLUGIN_FLOWBIT, ++ PLUGIN_FWSAM, + PLUGIN_MAX /* sentinel value */ + }; + +Index: snort-2.8.6.1/src/fatal.h +=================================================================== +--- snort-2.8.6.1/src/fatal.h (Revision 0) ++++ snort-2.8.6.1/src/fatal.h (Revision 3) +@@ -0,0 +1,40 @@ ++/* $Id$ */ ++/* ++** Copyright (C) 2002-2008 Sourcefire, Inc. ++** Copyright (C) 1998-2002 Martin Roesch <roesch@sourcefire.com> ++** ++** This program is free software; you can redistribute it and/or modify ++** it under the terms of the GNU General Public License Version 2 as ++** published by the Free Software Foundation. You may not use, modify or ++** distribute this program under any other version of the GNU General ++** Public License. ++** ++** 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 the Free Software ++** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. ++*/ ++ ++#ifndef __FATAL_H__ ++#define __FATAL_H__ ++ ++ ++/* ++ * in debugging mode print out the filename and the line number where the ++ * failure have occured ++ */ ++ ++ ++#ifdef DEBUG ++ #define FATAL(msg) { printf("%s:%d: ", __FILE__, __LINE__); FatalError( (char *) msg); } ++#else ++ #define FATAL(msg) FatalError( (char *) msg) ++#endif ++ ++ ++ ++#endif /* __FATAL_H__ */ + +Index: snort-2.8.6.1/src/output-plugins/spo_alert_fwsam.c +=================================================================== +--- snort-2.8.6.1/src/output-plugins/spo_alert_fwsam.c (Revision 0) ++++ snort-2.8.6.1/src/output-plugins/spo_alert_fwsam.c (Revision 3) +@@ -0,0 +1,1380 @@ ++/* $id: snortpatchb,v 1.2 2002/10/26 03:32:35 fknobbe Exp $ ++** ++** spo_alert_fwsam.c ++** ++** Copyright (c) 2001-2004 Frank Knobbe <frank@knobbe.us> ++** ++** 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 the Free Software ++** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. ++*/ ++ ++/* ++ * Purpose: ++ * ++ * This module sends alerts to a remote service on a host running SnortSam ++ * (the agent) which will block the intruding IP address on a variety of ++ * host and network firewalls. ++ * ++ * SnortSam also performs checks against a white-list of never-to-be-blocked IP addresses, ++ * can override block durations (for example for known proxies), and can detect attack conditions ++ * where too many blocks are received within a defined interval. If an attack is detected ++ * it will unblock the last x blocks and wait for the attack to end. ++ * ++ * See the SnortSam documentation for more information. ++ * ++ * ++ * Output Plugin Parameters: ++ *************************** ++ * ++ * output alert_fwsam: <SnortSam Station>:<port>/<key> ++ * ++ * <FW Mgmt Station>: The IP address or host name of the host running SnortSam. ++ * <port>: The port the remote SnortSam service listens on (default 898). ++ * <key>: The key used for authentication (encryption really) ++ * of the communication to the remote service. ++ * ++ * Examples: ++ * ++ * output alert_fwsam: snortsambox/idspassword ++ * output alert_fwsam: fw1.domain.tld:898/mykey ++ * output alert_fwsam: 192.168.0.1/borderfw 192.168.1.254/wanfw ++ * ++ * ++ * Rule Options: ++ *************** ++ * ++ * fwsam: who[how],time; ++ * ++ * who: src, source, dst, dest, destination ++ * IP address to be blocked according to snort rule (some rules ++ * are reversed, i.e. homenet -> any [and you want to block any]). ++ * src denotes IP to the left of -> and dst denotes IP to the right ++ * ++ * how: Optional. In, out, src, dest, either, both, this, conn, connection ++ * Tells FW-1 to block packets INcoming from host, OUTgoing to host, ++ * EITHERway, or only THIS connection (IP/Service pair). ++ * See 'fw sam' for more information. May be ignored by other plugins. ++ * ++ * time: Duration of block in seconds. (Accepts 'days', 'months', 'weeks', ++ * 'years', 'minutes', 'seconds', 'hours'. Alternatively, a value of ++ * 0, or the keyword PERManent, INFinite, or ALWAYS, will block the ++ * host permanently. Be careful with this! ++ * Tells FW-1 (and others) how long to inhibit packets from the host. ++ * ++ * Examples: ++ * ++ * fwsam: src[either],15min; ++ * or dst[in], 2 days 4 hours ++ * or src, 1 hour ++ * ++ * (default: src[either],5min) ++ * ++ * ++ * Effect: ++ * ++ * Alerts are sent to the remote SnortSam services on Firewall-1 Management Stations ++ * or other hosts running SnortSam (as required for Cisco Routers and PIX). ++ * The remote services will invoke the SAM configuration via the fw sam ++ * command line, or by sending a packet to the SAM port 18183, or by using the official ++ * OPSEC API calls, or by telnetting into Cisco routers or PIX firewalls. ++ * The communication over the network is encrypted using two-fish. ++ * (Implementation ripped from CryptCat by Farm9 with permission.) ++ * ++ * Future Plans: ++ * ++ * - Custom alert trigger per rule (x alerts in y secs) --> Seems to exist in Snort 1.9 now. ++ * - Enable/Allow tagged fwsam: arguments to provide different values to ++ * different stations. --> Seems to be accomplished with custom rule-types ++ * ++ * ++ * Comments: ++ * ++ * It seem that above wishes can be implemented with todays setup. Feedback concerning ++ * these is greatly appreciated. ++ * ++*/ ++ ++ ++#include "spo_alert_fwsam.h" ++#include "twofish.h" ++/* external globals from rules.c */ ++extern char *file_name; ++extern int file_line; ++extern OptTreeNode *otn_tmp; ++extern char *snort_conf_dir; /* extern PV pv; */ ++ ++ ++/* my globals */ ++ ++FWsamList *FWsamStationList=NULL; /* Global (for all alert-types) list of snortsam stations */ ++FWsamOptions *FWsamOptionField=NULL; ++unsigned long FWsamMaxOptions=0; ++ ++ ++/* ++ * Function: AlertFWsamSetup() ++ * ++ * Purpose: Registers the output plugin keyword and initialization ++ * function into the output plugin list. This is the function that ++ * gets called from InitOutputPlugins() in plugbase.c. ++ * It also registers itself as a plugin in order to parse every rule ++ * and to set the appropiate flags from fwsam: option. ++ * ++ * Arguments: None. ++ * ++ * Returns: void function ++ * ++*/ ++void AlertFWsamSetup(void) ++{ ++ /* link the preprocessor keyword to the init function in ++ the preproc list */ ++ RegisterOutputPlugin("alert_fwsam", OUTPUT_TYPE_FLAG__ALERT, AlertFWsamInit); ++ RegisterRuleOption("fwsam", AlertFWsamOptionInit, NULL, OPT_TYPE_ACTION, NULL); ++ ++#ifdef FWSAMDEBUG /* This allows debugging of fwsam only */ ++ LogMessage("DEBUG => [Alert_FWsam](AlertFWsamSetup) Output plugin is plugged in...\n"); ++#endif ++} ++ ++ ++/* This function checks if a given snortsam station is already in ++ * a given list. ++*/ ++int FWsamStationExists(FWsamStation *who,FWsamList *list) ++{ ++ while(list) ++ { ++ if(list->station) { ++// if( who->stationip.s_addr==list->station->stationip.s_addr && ++ if(IP_EQUALITY(&who->stationip, &list->station->stationip) && ++ who->stationport==list->station->stationport) ++ return TRUE; ++ } ++ list=list->next; ++ } ++ return FALSE; ++} ++ ++/* ++ * Function: AlertFWsamInit(char *args) ++ * ++ * Purpose: Calls the argument parsing function, performs final setup on data ++ * structs, links the preproc function into the function list. ++ * ++ * Arguments: args => ptr to argument string ++ * ++ * Returns: void function ++ * ++*/ ++void AlertFWsamInit(char *args) ++{ char *ap; ++ unsigned long statip,cnt,again,i; ++ char *stathost,*statport,*statpass; ++ FWsamStation *station; ++ FWsamList *fwsamlist=NULL; /* alert-type dependent list of snortsam stations */ ++ FWsamList *listp,*newlistp; ++ struct hostent *hoste; ++ char buf[1024]=""; ++ FILE *fp; ++ FWsamOptions tempopt; ++ ++#ifdef FWSAMDEBUG ++ unsigned long hostcnt=0; ++ ++ ++ ++ LogMessage("DEBUG => [Alert_FWsam](AlertFWsamInit) Output plugin initializing...\n"); ++#endif ++ ++ /* pv.alert_plugin_active = 1; */ ++ ++ /* parse the argument list from the rules file */ ++ ++ if(args == NULL) ++ FatalError("ERROR %s (%d) => [Alert_FWsam](AlertFWsamInit) No arguments to alert_fwsam preprocessor!\n", file_name, file_line); ++ ++ if(!FWsamOptionField && !FWsamMaxOptions) ++ { strncpy(buf,snort_conf_dir,sizeof(buf)-1); ++ strncpy(buf+strlen(buf),SID_MAPFILE,sizeof(buf)-strlen(buf)-1); ++#ifdef FWSAMDEBUG ++ LogMessage("DEBUG => [Alert_FWsam](AlertFWsamSetup) Using file: %s\n",buf); ++#endif ++ fp=fopen(buf,"rt"); ++ if(!fp) ++ { strncpy(buf,snort_conf_dir,sizeof(buf)-1); ++ strncpy(buf+strlen(buf),SID_ALT_MAPFILE,sizeof(buf)-strlen(buf)-1); ++ fp=fopen(buf,"rt"); ++ } ++ if(fp) /* Check for presence of map file and read those in, sorted. */ ++ { LogMessage("INFO => [Alert_FWsam](AlertFWsamSetup) Using sid-map file: %s\n",buf); ++ ++ while(FWsamReadLine(buf,sizeof(buf),fp)) ++ if(*buf) ++ FWsamMaxOptions++; ++ if(FWsamMaxOptions) ++ { if((FWsamOptionField=(FWsamOptions *)malloc(sizeof(FWsamOptions)*FWsamMaxOptions))==NULL) ++ FatalError("ERROR => [Alert_FWsam](AlertFWsamSetup) malloc failed for OptionField!\n"); ++ fseek(fp,0,SEEK_SET); ++ for(cnt=0;cnt<FWsamMaxOptions;) ++ { FWsamReadLine(buf,sizeof(buf),fp); ++ if(*buf) ++ FWsamParseLine(&(FWsamOptionField[cnt++]),buf); ++ } ++ if(FWsamMaxOptions>1) ++ { for(again=TRUE,cnt=FWsamMaxOptions-1;cnt>=1 && again;cnt--) ++ { for(again=FALSE,i=0;i<cnt;i++) ++ { if(FWsamOptionField[i].sid>FWsamOptionField[i+1].sid) ++ { memcpy(&tempopt,&(FWsamOptionField[i]),sizeof(FWsamOptions)); ++ memcpy(&(FWsamOptionField[i]),&(FWsamOptionField[i+1]),sizeof(FWsamOptions)); ++ memcpy(&(FWsamOptionField[i+1]),&tempopt,sizeof(FWsamOptions)); ++ again=TRUE; ++ } ++ } ++ } ++ } ++ } ++ else ++ FWsamMaxOptions=1; ++ fclose(fp); ++ } ++ else ++ FWsamMaxOptions=1; ++ } ++ ++ ++ ap=args; /* start at the beginning of the argument */ ++ while(*ap && isspace(*ap)) ap++; ++ while(*ap) ++ { stathost=ap; /* first argument should be host */ ++ statport=NULL; ++ statpass=NULL; ++ while(*ap && *ap!=':' && *ap!='/' && !isspace(*ap)) ap++; /* find token */ ++ switch(*ap) ++ { case ':': *ap++=0; /* grab the port */ ++ statport=ap; ++ while(*ap && *ap!='/' && !isspace(*ap)) ap++; ++ if(*ap!='/') ++ break; ++ case '/': *ap++=0; /* grab the key */ ++ statpass=ap; ++ while(*ap && !isspace(*ap)) ap++; ++ default: break; ++ } ++ if(*ap) ++ { *ap++=0; ++ while(isspace(*ap)) ap++; ++ } ++ /* now we have the first host with port and password (key) */ ++ /* next we check for valid/blank password/port */ ++ if(statpass!=NULL) ++ if(!*statpass) ++ statpass=NULL; ++ if(statport!=NULL) ++ if(!*statport) ++ statport=NULL; ++ statip=0; ++ /* now we check if a valid host was specified */ ++ if(inet_addr(stathost)==INADDR_NONE) ++ { hoste=gethostbyname(stathost); ++ if (!hoste) ++ LogMessage("WARNING %s (%d) => [Alert_FWsam](AlertFWsamInit) Unable to resolve host '%s'!\n",file_name,file_line,stathost); ++ else ++ statip=*(unsigned long *)hoste->h_addr; ++ } ++ else ++ { statip=inet_addr(stathost); ++ if(!statip) ++ LogMessage("WARNING %s (%d) => [Alert_FWsam](AlertFWsamInit) Invalid host address '%s'!\n",file_name,file_line,stathost); ++ } ++ if(statip) ++ { /* groovie, a valid host. Let's alloc and assemble the structure for it. */ ++ if((station=(FWsamStation *)malloc(sizeof(FWsamStation)))==NULL) ++ FatalError("ERROR => [Alert_FWsam](AlertFWsamInit) malloc failed for station!\n"); ++ ++// station->stationip.s_addr=statip; /* the IP address */ ++ station->stationip.ip32[0] = statip; /* the IP address */ ++ if(statport!=NULL && atoi(statport)>0) /* if the user specified one */ ++ station->stationport=atoi(statport); /* use users setting */ ++ else ++ station->stationport=FWSAM_DEFAULTPORT; /* set the default port */ ++ ++ if(statpass!=NULL) /* if specified by user */ ++ strncpy(station->stationkey,statpass,TwoFish_KEY_LENGTH); /* use defined key */ ++ else ++ station->stationkey[0]=0; ++ station->stationkey[TwoFish_KEY_LENGTH]=0; /* make sure it's terminated. (damn strncpy...) */ ++ ++ strcpy(station->initialkey,station->stationkey); ++ station->stationfish=TwoFishInit(station->stationkey); ++ ++ station->localsocketaddr.sin_port=htons(0); /* let's use dynamic ports for now */ ++ station->localsocketaddr.sin_addr.s_addr=0; ++ station->localsocketaddr.sin_family=AF_INET; ++ station->stationsocketaddr.sin_port=htons(station->stationport); ++ //station->stationsocketaddr.sin_addr=station->stationip; ++ station->stationsocketaddr.sin_addr.s_addr=station->stationip.ip32[0]; ++ station->stationsocketaddr.sin_family=AF_INET; /* load all socket crap and keep for later */ ++ ++ do ++ station->myseqno=rand(); /* the seqno this host will use */ ++ while(station->myseqno<20 || station->myseqno>65500); ++ station->mykeymod[0]=rand(); ++ station->mykeymod[1]=rand(); ++ station->mykeymod[2]=rand(); ++ station->mykeymod[3]=rand(); ++ station->stationseqno=0; /* peer hasn't answered yet. */ ++ ++ ++ if(!FWsamStationExists(station,FWsamStationList)) /* If we don't have the station already in global list....*/ ++ { if(FWsamCheckIn(station)) /* ...and we can talk to the agent... */ ++ { if((newlistp=(FWsamList *)malloc(sizeof(FWsamList)))==NULL) ++ FatalError("ERROR => [Alert_FWsam](AlertFWsamInit) malloc failed for global newlistp!\n"); ++ newlistp->station=station; ++ newlistp->next=NULL; ++ ++ if(!FWsamStationList) /* ... add it to the global list/ */ ++ FWsamStationList=newlistp; ++ else ++ { listp=FWsamStationList; ++ while(listp->next) ++ listp=listp->next; ++ listp->next=newlistp; ++ } ++ } ++ else ++ { TwoFishDestroy(station->stationfish); /* if not, we trash it. */ ++ free(station); ++ station=NULL; ++ } ++ } ++#ifdef FWSAMDEBUG ++ else ++ LogMessage("DEBUG => [Alert_FWsam](AlertFWsamInit) Host %s:%i already in global list, skipping CheckIn.\n", sfip_ntoa(&station->stationip),station->stationport); ++#endif ++ ++ if(station) ++ { if(!FWsamStationExists(station,fwsamlist)) /* If we don't have the station already in local list....*/ ++ { if((newlistp=(FWsamList *)malloc(sizeof(FWsamList)))==NULL) ++ FatalError("ERROR => [Alert_FWsam](AlertFWsamInit) malloc failed for local newlistp!\n"); ++ newlistp->station=station; ++ newlistp->next=NULL; ++ ++ if(!fwsamlist) /* ... add it to the local list/ */ ++ fwsamlist=newlistp; ++ else ++ { listp=fwsamlist; ++ while(listp->next) ++ listp=listp->next; ++ listp->next=newlistp; ++ } ++ } ++ ++#ifdef FWSAMDEBUG ++ else ++ LogMessage("DEBUG => [Alert_FWsam](AlertFWsamInit) Host %s:%i already in local list, skipping.\n",sfip_ntoa(&station->stationip),station->stationport); ++ LogMessage("DEBUG => [Alert_FWsam](AlertFWsamInit) #%i: Host %s [%s] port %i password %s\n",++hostcnt,stathost,sfip_ntoa(&station->stationip),station->stationport,station->stationkey); ++#endif ++ } ++ ++ } ++ } /* next one */ ++ ++#ifdef FWSAMDEBUG ++ LogMessage("DEBUG => [Alert_FWsam](AlertFWsamInit) Linking fwsam alert function to call list...\n"); ++#endif ++ ++ /* Set the preprocessor function into the function list */ ++ AddFuncToOutputList(AlertFWsam, OUTPUT_TYPE_FLAG__ALERT, fwsamlist); ++ AddFuncToCleanExitList(AlertFWsamCleanExitFunc, fwsamlist); ++ AddFuncToRestartList(AlertFWsamRestartFunc, fwsamlist); ++} ++ ++ ++/* This routine reads in a str from a file, snips white-spaces ++ * off the front and back, removes comments, and pretties the ++ * string. Returns true or false if a line was read or not. ++*/ ++int FWsamReadLine(char *buf,unsigned long bufsize,FILE *fp) ++{ char *p; ++ ++ if(fgets(buf,bufsize-1,fp)) ++ { buf[bufsize-1]=0; ++ ++#ifdef FWSAMDEBUG_off ++ LogMessage("DEBUG => [Alert_FWsam](AlertFWsamReadLine) Line: %s\n",buf); ++#endif ++ ++ p=buf; ++ while(isspace(*p)) ++ p++; ++ if(p>buf); ++ strcpy(buf,p); ++ if(*buf) ++ { p=buf+strlen(buf)-1; /* remove leading and trailing spaces */ ++ while(isspace(*p)) ++ *p-- =0; ++ } ++ p=buf; ++ if(*p=='#' || *p==';') ++ *p=0; ++ else ++ p++; ++ while(*p) /* remove inline comments (except escaped #'s and ;'s) */ ++ { if(*p=='#' || *p==';') ++ { if(*(p-1)=='\\') ++ strcpy(p-1,p); ++ else ++ *p=0; ++ } ++ else ++ p++; ++ } ++ return TRUE; ++ } ++ return FALSE; ++} ++ ++ ++/* Parses the duration of the argument, recognizing minutes, hours, etc.. ++*/ ++unsigned long FWsamParseDuration(char *p) ++{ unsigned long dur=0,tdu; ++ char *tok,c1,c2; ++ ++ while(*p) ++ { tok=p; ++ while(*p && isdigit(*p)) ++ p++; ++ if(*p) ++ { c1=tolower(*p); ++ *p=0; ++ p++; ++ if(*p && !isdigit(*p)) ++ { c2=tolower(*p++); ++ while(*p && !isdigit(*p)) ++ p++; ++ } ++ else ++ c2=0; ++ tdu=atol(tok); ++ switch(c1) ++ { case 'm': if(c2=='o') /* month */ ++ tdu*=(60*60*24*30); /* use 30 days */ ++ else ++ tdu*=60; /* minutes */ ++ case 's': break; /* seconds */ ++ case 'h': tdu*=(60*60); /* hours */ ++ break; ++ case 'd': tdu*=(60*60*24); /* days */ ++ break; ++ case 'w': tdu*=(60*60*24*7); /* week */ ++ break; ++ case 'y': tdu*=(60*60*24*365); /* year */ ++ break; ++ } ++ dur+=tdu; ++ } ++ else ++ dur+=atol(tok); ++ } ++ ++ return dur; ++} ++ ++ ++/* This routine parses an option line. It is called by FWsamParseLine, ++ * which parses the sid-block.map file, and also by AlertFWsamOptionInit, ++ * which is called by Snort when processing fwsam: options in rules. ++ * It returns TRUE it there is a possible option problem, otherwise FALSE. ++*/ ++int FWsamParseOption(FWsamOptions *optp,char *ap) ++{ int possprob=FALSE; ++ ++ /* set defaults */ ++ ++ optp->duration=300; /* default of 5 minute block */ ++ optp->how=FWSAM_HOW_INOUT; /* inbound and outbound block */ ++ optp->who=FWSAM_WHO_SRC; /* the source */ ++ optp->loglevel=FWSAM_LOG_LONGALERT; /* the log level default */ ++ /* parse the fwsam keywords */ ++ ++#ifdef FWSAMDEBUG ++ LogMessage("DEBUG => [Alert_FWsam](AlertFWamOptionInit) Parse Options Args: %s\n",ap); ++#endif ++ ++ if(*ap) /* should be dst/src (the WHO) or duration */ ++ { if(isdigit(*ap)) ++ optp->duration=FWsamParseDuration(ap); ++ else ++ { switch(*ap) /* yeah, we're lazy and check only the first character */ ++ { case 'p': ; /* permanent, perm */ ++ case 'f': ; /* forever */ ++ case 'i': optp->duration=0; /* infinite, inf */ ++ break; ++ case 'd': optp->who=FWSAM_WHO_DST; /* destination, dest, dst */ ++ break; ++ case 's': optp->who=FWSAM_WHO_SRC; /* source, src */ ++ break; ++ default: possprob=TRUE; ++ } ++ while(*ap && *ap!=',' && *ap!='[') ++ ap++; ++ if(*ap=='[') ++ { ap++; /* now we have the HOW */ ++ switch(*ap) ++ { case 'i': ; /* in */ ++ case 's': optp->how=FWSAM_HOW_IN; /* source, src */ ++ break; ++ case 'o': ; /* out */ ++ case 'd': optp->how=FWSAM_HOW_OUT; /* destination, dest, dst */ ++ break; ++ case 'b': ; /* both */ ++ case 'e': optp->how=FWSAM_HOW_INOUT; /* either */ ++ break; ++ case 't': ; /* this */ ++ case 'c': optp->how=FWSAM_HOW_THIS; /* connection, conn */ ++ break; ++ default: possprob=TRUE; ++ } ++ while(*ap && *ap!=',') ++ ap++; ++ } ++ if(*ap==',') ++ { ap++; ++ if(isdigit(*ap)) /* and figure out how long to block */ ++ optp->duration=FWsamParseDuration(ap); ++ else if(*ap=='p' || *ap=='f' || *ap=='i') ++ optp->duration=0; ++ else ++ possprob=TRUE; ++ } ++ else if(!*ap) ++ possprob=TRUE; ++ } ++ } ++ else ++ possprob=TRUE; ++ ++ return possprob; ++} ++ ++ ++/* This goes through the lines of sid-block.map and sets the ++ * options for fwsam if the file is being used. ++*/ ++void FWsamParseLine(FWsamOptions *optp,char *buf) ++{ char *ap; ++ ++ ap=buf; /* start at the beginning of the argument */ ++ ++ while(*ap) ++ { if(isspace(*ap)) /* normalize spaces (tabs into space, etc) */ ++ *ap=' '; ++ if(isupper(*ap)) /* and set to lower case */ ++ *ap=tolower(*ap); ++ ap++; ++ } ++ while((ap=strrchr(buf,' '))!=NULL) /* remove spaces */ ++ strcpy(ap,ap+1); ++ ++ ap=buf; ++ if(*ap) ++ { while(*ap && *ap!=':' && *ap!='|') ++ ap++; ++ *ap++ =0; ++ while(*ap && (*ap==':' || *ap=='|')) ++ ap++; ++ ++ optp->sid=(unsigned long)atol(buf); ++ ++ if(FWsamParseOption(optp,ap)) ++ LogMessage("WARNING %s (%d) => [Alert_FWsam](AlertFWamOptionInit) Possible option problem. Using %s[%s],%lu.\n",file_name,file_line,(optp->who==FWSAM_WHO_SRC)?"src":"dst",(optp->how==FWSAM_HOW_IN)?"in":((optp->how==FWSAM_HOW_OUT)?"out":"either"),optp->duration); ++ } ++ else ++ optp->sid=0; ++} ++ ++ ++ ++/* ++ * Function: AlertFWsamOptionInit(char *data, OptTreeNode *otn, int protocol) ++ * ++ * Purpose: Parses each rule and sets the option flags in the tree. ++ * ++ * Arguments: args => ptr to argument string ++ * ++ * Returns: void function ++ * ++*/ ++void AlertFWsamOptionInit(char *args,OptTreeNode *otn,int protocol) ++{ ++ FWsamOptions *optp; ++ char *ap; ++ ++ ++#ifdef FWSAMDEBUG ++ LogMessage("DEBUG => [Alert_FWsam](AlertFWamOptionInit) FWsamOptionInit is parsing...\n"); ++#endif ++ ++ if((optp=(FWsamOptions *)malloc(sizeof(FWsamOptions)))==NULL) ++ FatalError("ERROR => [Alert_FWsam](AlertFWamOptionInit) malloc failed for opt!\n"); ++ ++ ++ ap=args; /* start at the beginning of the argument */ ++ ++ while(*ap) ++ { if(isspace(*ap)) /* normalize spaces (tabs into space, etc) */ ++ *ap=' '; ++ if(isupper(*ap)) /* and set to lower case */ ++ *ap=tolower(*ap); ++ ap++; ++ } ++ while((ap=strrchr(args,' '))!=NULL) /* remove spaces */ ++ strcpy(ap,ap+1); ++ ++ ++ if(FWsamParseOption(optp,args)) ++ LogMessage("WARNING %s (%d) => [Alert_FWsam](AlertFWamOptionInit) Possible option problem. Using %s[%s],%lu.\n",file_name,file_line,(optp->who==FWSAM_WHO_SRC)?"src":"dst",(optp->how==FWSAM_HOW_IN)?"in":((optp->how==FWSAM_HOW_OUT)?"out":"either"),optp->duration); ++ ++ otn->ds_list[PLUGIN_FWSAM]=(FWsamOptions *)optp; ++} ++ ++ ++/* Generates a new encryption key for TwoFish based on seq numbers and a random that ++ * the SnortSam agents send on checkin (in protocol) ++*/ ++void FWsamNewStationKey(FWsamStation *station,FWsamPacket *packet) ++{ ++ //unsigned char newkey[TwoFish_KEY_LENGTH+2]; ++ char newkey[TwoFish_KEY_LENGTH+2]; ++ int i; ++ ++ newkey[0]=packet->snortseqno[0]; /* current snort seq # (which both know) */ ++ newkey[1]=packet->snortseqno[1]; ++ newkey[2]=packet->fwseqno[0]; /* current SnortSam seq # (which both know) */ ++ newkey[3]=packet->fwseqno[1]; ++ newkey[4]=packet->protocol[0]; /* the random SnortSam chose */ ++ newkey[5]=packet->protocol[1]; ++ ++ strncpy(newkey+6,station->stationkey,TwoFish_KEY_LENGTH-6); /* append old key */ ++ newkey[TwoFish_KEY_LENGTH]=0; ++ ++ newkey[0]^=station->mykeymod[0]; /* modify key with key modifiers which were */ ++ newkey[1]^=station->mykeymod[1]; /* exchanged during the check-in handshake. */ ++ newkey[2]^=station->mykeymod[2]; ++ newkey[3]^=station->mykeymod[3]; ++ newkey[4]^=station->fwkeymod[0]; ++ newkey[5]^=station->fwkeymod[1]; ++ newkey[6]^=station->fwkeymod[2]; ++ newkey[7]^=station->fwkeymod[3]; ++ ++ for(i=0;i<=7;i++) ++ if(newkey[i]==0) ++ newkey[i]++; ++ ++ strcpy(station->stationkey,newkey); ++ TwoFishDestroy(station->stationfish); ++ station->stationfish=TwoFishInit(newkey); ++} ++ ++ ++/* This routine will search the option list as defined ++ * by the sid-block.map file and return a pointer ++ * to the matching record. ++*/ ++FWsamOptions *FWsamGetOption(unsigned long sid) ++{ signed long i,step,diff,o,o2; ++ ++#ifdef FWSAM_FANCYFETCH /* Fancy-fetch jumps in decreasing n/2 steps and takes much less lookups */ ++ o=o2= -1; ++ i=step=FWsamMaxOptions>>1; ++ while(i>=0 && i<FWsamMaxOptions && i!=o2) ++ { diff=sid-FWsamOptionField[i].sid; ++ if(!diff) ++ return &(FWsamOptionField[i]); ++ if(step>1) ++ step=step>>1; ++ o2=o; ++ o=i; ++ if(diff>0) ++ i+=step; ++ else ++ i-=step; ++ } ++#else /* This is just a sequential list lookup */ ++ for(i=0;i<FWsamMaxOptions;i++) ++ if(FWsamOptionField[i].sid==sid) ++ return &(FWsamOptionField[i]); ++#endif ++ return NULL; ++} ++ ++ ++/**************************************************************************** ++ * ++ * Function: AlertFWsam(Packet *, char *) ++ * ++ * Purpose: Send the current alert to a remote module on a FW-1 mgmt station ++ * ++ * Arguments: p => pointer to the packet data struct ++ * msg => the message to print in the alert ++ * ++ * Returns: void function ++ * ++ ***************************************************************************/ ++void AlertFWsam(Packet *p, char *msg, void *arg, Event *event) ++{ FWsamOptions *optp; ++ FWsamPacket sampacket; ++ FWsamStation *station=NULL; ++ FWsamList *fwsamlist; ++ SOCKET stationsocket; ++ int i,len,deletestation,stationtry=0; ++ //unsigned char *encbuf,*decbuf; ++ char *encbuf,*decbuf; ++ static unsigned long lastbsip[FWSAM_REPET_BLOCKS],lastbdip[FWSAM_REPET_BLOCKS], ++ lastbduration[FWSAM_REPET_BLOCKS],lastbtime[FWSAM_REPET_BLOCKS]; ++ static unsigned short lastbsp[FWSAM_REPET_BLOCKS],lastbdp[FWSAM_REPET_BLOCKS], ++ lastbproto[FWSAM_REPET_BLOCKS],lastbpointer; ++ static unsigned char lastbmode[FWSAM_REPET_BLOCKS]; ++ static unsigned long btime=0; ++ ++ ++ if(otn_tmp==NULL) ++ { ++#ifdef FWSAMDEBUG ++ LogMessage("DEBUG => [Alert_FWsam] NULL otn_tmp!\n"); ++#endif ++ return; ++ } ++ if(p == NULL) ++ { ++#ifdef FWSAMDEBUG ++ LogMessage("DEBUG => [Alert_FWsam] NULL packet!\n"); ++#endif ++ return; ++ } ++ if(arg == NULL) ++ { ++#ifdef FWSAMDEBUG ++ LogMessage("DEBUG => [Alert_FWsam] NULL arg!\n"); ++#endif ++ return; ++ } ++ ++ /* SnortSam does no IPv6 */ ++ if (!IS_IP4(p)) { ++#ifdef FWSAMDEBUG ++ LogMessage("DEBUG => [Alert_FWsam] not acting on non-IP4 packet!\n"); ++#endif ++ return; ++ } ++ ++ optp=NULL; ++ ++ if(FWsamOptionField) /* If using the file (field present), let's use that */ ++ optp=FWsamGetOption(event->sig_id); ++ ++ if(!optp) /* If file not present, check if an fwsam option was defined on the triggering rule */ ++ optp=otn_tmp->ds_list[PLUGIN_FWSAM]; ++ ++ if(optp) /* if options specified for this rule */ ++ { if(!btime) /* if this is the first time this function is */ ++ { for(i=0;i<FWSAM_REPET_BLOCKS;i++) /* called, reset the time and protocol to 0. */ ++ { lastbproto[i]=0; ++ lastbtime[i]=0; ++ } ++ } ++ ++ fwsamlist=(FWsamList *)arg; ++ ++#ifdef FWSAMDEBUG ++ LogMessage("DEBUG => [Alert_FWsam] Alert -> Msg=\"%s\"\n",msg); ++ ++ LogMessage("DEBUG => [Alert_FWsam] Alert -> Option: %s[%s],%lu.\n",(optp->who==FWSAM_WHO_SRC)?"src":"dst",(optp->how==FWSAM_HOW_IN)?"in":((optp->how==FWSAM_HOW_OUT)?"out":"either"),optp->duration); ++#endif ++ ++ len=TRUE; ++ btime=(unsigned long)time(NULL); /* get current time */ ++ /* This is a cheap check to see if the blocking request matches any of the previous requests. */ ++ for(i=0;i<FWSAM_REPET_BLOCKS && len;i++) ++ { if( ((optp->how==FWSAM_HOW_THIS)? /* if blocking mode SERVICE, check for src and dst */ ++ ( lastbsip[i]==p->iph->ip_src.s_addr && lastbdip[i]==p->iph->ip_dst.s_addr &&lastbproto[i]==p->iph->ip_proto && ++ ((p->iph->ip_proto==IPPROTO_TCP || p->iph->ip_proto==IPPROTO_UDP)? /* check port only of TCP or UDP */ ++/* ((optp->who==FWSAM_WHO_SRC)?(lastbsp[i]==p->sp):(lastbdp[i]==p->dp)):TRUE) ): */ ++ lastbdp[i]==p->dp:TRUE) ): ++ ((optp->who==FWSAM_WHO_SRC)?(lastbsip[i]==p->iph->ip_src.s_addr):(lastbdip[i]==p->iph->ip_dst.s_addr))) && /* otherwise if we block source, only compare source. Same for dest. */ ++ lastbduration[i]==optp->duration && ++ (lastbmode[i]&(FWSAM_HOW|FWSAM_WHO))==(optp->how|optp->who) && ++ (btime-lastbtime[i]<((optp->duration>FWSAM_REPET_TIME)?FWSAM_REPET_TIME:optp->duration))) ++ { len=FALSE; /* If so, we don't need to block again. */ ++ } ++ } ++ if(len) ++ { if(++lastbpointer>=FWSAM_REPET_BLOCKS) /* increase repetitive check pointer */ ++ lastbpointer=0; ++ lastbsip[lastbpointer]=p->iph->ip_src.s_addr; /* and note packet details */ ++ lastbdip[lastbpointer]=p->iph->ip_dst.s_addr; ++ lastbduration[lastbpointer]=optp->duration; ++ lastbmode[lastbpointer]=optp->how|optp->who|optp->loglevel; ++ lastbproto[lastbpointer]=p->iph->ip_proto; ++ if(p->iph->ip_proto==IPPROTO_TCP || p->iph->ip_proto==IPPROTO_UDP) ++ { lastbsp[lastbpointer]=p->sp; /* set ports if TCP or UDP */ ++ lastbdp[lastbpointer]=p->dp; ++ } ++ lastbtime[lastbpointer]=btime; ++ ++ ++ while(fwsamlist!=NULL) ++ { station=fwsamlist->station; ++ //if(station->stationip.s_addr) ++ if(station->stationip.ip32[0]) ++ { deletestation=FALSE; ++ stationtry++; /* first try */ ++ /* create a socket for the station */ ++ stationsocket=socket(PF_INET,SOCK_STREAM,IPPROTO_TCP); ++ if(stationsocket==INVALID_SOCKET) ++ FatalError("ERROR => [Alert_FWsam] Funky socket error (socket)!\n"); ++ if(bind(stationsocket,(struct sockaddr *)&(station->localsocketaddr),sizeof(struct sockaddr))) ++ FatalError("ERROR => [Alert_FWsam] Could not bind socket!\n"); ++ ++ /* let's connect to the agent */ ++ if(connect(stationsocket,(struct sockaddr *)&station->stationsocketaddr,sizeof(struct sockaddr))) ++ { ++ LogMessage("WARNING => [Alert_FWsam] Could not send block to host %s. Will try later.\n",sfip_ntoa(&station->stationip)); ++#ifdef WIN32 ++ closesocket(stationsocket); ++#else ++ close(stationsocket); ++#endif ++ stationtry=0; ++ } ++ else ++ { ++#ifdef FWSAMDEBUG ++ LogMessage("DEBUG => [Alert_FWsam] Connected to host %s.\n",sfip_ntoa(&station->stationip)); ++#endif ++ /* now build the packet */ ++ station->myseqno+=station->stationseqno; /* increase my seqno by adding agent seq no */ ++ sampacket.endiancheck=1; /* This is an endian indicator for Snortsam */ ++ sampacket.snortseqno[0]=(char)station->myseqno; ++ sampacket.snortseqno[1]=(char)(station->myseqno>>8); ++ sampacket.fwseqno[0]=(char)station->stationseqno;/* fill station seqno */ ++ sampacket.fwseqno[1]=(char)(station->stationseqno>>8); ++ sampacket.status=FWSAM_STATUS_BLOCK; /* set block mode */ ++ sampacket.version=FWSAM_PACKETVERSION; /* set packet version */ ++ sampacket.duration[0]=(char)optp->duration; /* set duration */ ++ sampacket.duration[1]=(char)(optp->duration>>8); ++ sampacket.duration[2]=(char)(optp->duration>>16); ++ sampacket.duration[3]=(char)(optp->duration>>24); ++ sampacket.fwmode=optp->how|optp->who|optp->loglevel; /* set the mode */ ++ sampacket.dstip[0]=(char)p->iph->ip_dst.s_addr; /* destination IP */ ++ sampacket.dstip[1]=(char)(p->iph->ip_dst.s_addr>>8); ++ sampacket.dstip[2]=(char)(p->iph->ip_dst.s_addr>>16); ++ sampacket.dstip[3]=(char)(p->iph->ip_dst.s_addr>>24); ++ sampacket.srcip[0]=(char)p->iph->ip_src.s_addr; /* source IP */ ++ sampacket.srcip[1]=(char)(p->iph->ip_src.s_addr>>8); ++ sampacket.srcip[2]=(char)(p->iph->ip_src.s_addr>>16); ++ sampacket.srcip[3]=(char)(p->iph->ip_src.s_addr>>24); ++ sampacket.protocol[0]=(char)p->iph->ip_proto; /* protocol */ ++ sampacket.protocol[1]=(char)(p->iph->ip_proto>>8);/* protocol */ ++ ++ if(p->iph->ip_proto==IPPROTO_TCP || p->iph->ip_proto==IPPROTO_UDP) ++ { sampacket.srcport[0]=(char)p->sp; /* set ports */ ++ sampacket.srcport[1]=(char)(p->sp>>8); ++ sampacket.dstport[0]=(char)p->dp; ++ sampacket.dstport[1]=(char)(p->dp>>8); ++ } ++ else ++ sampacket.srcport[0]=sampacket.srcport[1]=sampacket.dstport[0]=sampacket.dstport[1]=0; ++ ++ sampacket.sig_id[0]=(char)event->sig_id; /* set signature ID */ ++ sampacket.sig_id[1]=(char)(event->sig_id>>8); ++ sampacket.sig_id[2]=(char)(event->sig_id>>16); ++ sampacket.sig_id[3]=(char)(event->sig_id>>24); ++ ++#ifdef FWSAMDEBUG ++ LogMessage("DEBUG => [Alert_FWsam] Sending BLOCK\n"); ++ LogMessage("DEBUG => [Alert_FWsam] Snort SeqNo: %x\n",station->myseqno); ++ LogMessage("DEBUG => [Alert_FWsam] Mgmt SeqNo : %x\n",station->stationseqno); ++ LogMessage("DEBUG => [Alert_FWsam] Status : %i\n",FWSAM_STATUS_BLOCK); ++ LogMessage("DEBUG => [Alert_FWsam] Mode : %i\n",optp->how|optp->who|optp->loglevel); ++ LogMessage("DEBUG => [Alert_FWsam] Duration : %li\n",optp->duration); ++ LogMessage("DEBUG => [Alert_FWsam] Protocol : %i\n",GET_IPH_PROTO(p)); ++#ifdef SUP_IP6 ++ LogMessage("DEBUG => [Alert_FWsam] Src IP : %s\n",sfip_ntoa(GET_SRC_IP(p))); ++ LogMessage("DEBUG => [Alert_FWsam] Dest IP : %s\n",sfip_ntoa(GET_DST_IP(p))); ++#else ++ LogMessage("DEBUG => [Alert_FWsam] Src IP : %s\n",inet_ntoa(p->iph->ip_src)); ++ LogMessage("DEBUG => [Alert_FWsam] Dest IP : %s\n",inet_ntoa(p->iph->ip_dst)); ++#endif ++ LogMessage("DEBUG => [Alert_FWsam] Src Port : %i\n",p->sp); ++ LogMessage("DEBUG => [Alert_FWsam] Dest Port : %i\n",p->dp); ++ LogMessage("DEBUG => [Alert_FWsam] Sig_ID : %lu\n",event->sig_id); ++ ++#endif ++ ++ encbuf=TwoFishAlloc(sizeof(FWsamPacket),FALSE,FALSE,station->stationfish); /* get the encryption buffer */ ++ len=TwoFishEncrypt((char *)&sampacket,&encbuf,sizeof(FWsamPacket),FALSE,station->stationfish); /* encrypt the packet with current key */ ++ ++ if(send(stationsocket,encbuf,len,0)!=len) /* weird...could not send */ ++ { LogMessage("WARNING => [Alert_FWsam] Could not send to host %s. Will try again later.\n",sfip_ntoa(&station->stationip)); ++#ifdef WIN32 ++ closesocket(stationsocket); ++#else ++ close(stationsocket); ++#endif ++ stationtry=0; ++ } ++ else ++ { i=FWSAM_NETWAIT; ++#ifdef WIN32 ++ ioctlsocket(stationsocket,FIONBIO,&i); /* set non blocking and wait for */ ++#else ++ ioctl(stationsocket,FIONBIO,&i); /* set non blocking and wait for */ ++#endif ++ while(i-- >1) /* the response packet */ ++ { waitms(10); /* wait for response (default maximum 3 secs */ ++ if(recv(stationsocket,encbuf,len,0)==len) ++ i=0; /* if we received packet we set the counter to 0. */ ++ /* by the time we check with if, it's already dec'ed to -1 */ ++ } ++ if(!i) /* id we timed out (i was one, then dec'ed)... */ ++ { LogMessage("WARNING => [Alert_FWsam] Did not receive response from host %s. Will try again later.\n",sfip_ntoa(&station->stationip)); ++#ifdef WIN32 ++ closesocket(stationsocket); ++#else ++ close(stationsocket); ++#endif ++ stationtry=0; ++ } ++ else /* got a packet */ ++ { decbuf=(char *)&sampacket; /* get the pointer to the packet struct */ ++ len=TwoFishDecrypt(encbuf,&decbuf,sizeof(FWsamPacket)+TwoFish_BLOCK_SIZE,FALSE,station->stationfish); /* try to decrypt the packet with current key */ ++ ++ if(len!=sizeof(FWsamPacket)) /* invalid decryption */ ++ { strcpy(station->stationkey,station->initialkey); /* try the intial key */ ++ TwoFishDestroy(station->stationfish); ++ station->stationfish=TwoFishInit(station->stationkey); /* re-initialize the TwoFish with the intial key */ ++ len=TwoFishDecrypt(encbuf,&decbuf,sizeof(FWsamPacket)+TwoFish_BLOCK_SIZE,FALSE,station->stationfish); /* try again to decrypt */ ++ LogMessage("INFO => [Alert_FWsam] Had to use initial key!\n"); ++ } ++ if(len==sizeof(FWsamPacket)) /* valid decryption */ ++ { if(sampacket.version==FWSAM_PACKETVERSION)/* master speaks my language */ ++ { if(sampacket.status==FWSAM_STATUS_OK || sampacket.status==FWSAM_STATUS_NEWKEY ++ || sampacket.status==FWSAM_STATUS_RESYNC || sampacket.status==FWSAM_STATUS_HOLD) ++ { station->stationseqno=sampacket.fwseqno[0] | (sampacket.fwseqno[1]<<8); /* get stations seqno */ ++ station->lastcontact=(unsigned long)time(NULL); /* set the last contact time (not used yet) */ ++#ifdef FWSAMDEBUG ++ LogMessage("DEBUG => [Alert_FWsam] Received %s\n",sampacket.status==FWSAM_STATUS_OK?"OK": ++ sampacket.status==FWSAM_STATUS_NEWKEY?"NEWKEY": ++ sampacket.status==FWSAM_STATUS_RESYNC?"RESYNC": ++ sampacket.status==FWSAM_STATUS_HOLD?"HOLD":"ERROR"); ++ LogMessage("DEBUG => [Alert_FWsam] Snort SeqNo: %x\n",sampacket.snortseqno[0]|(sampacket.snortseqno[1]<<8)); ++ LogMessage("DEBUG => [Alert_FWsam] Mgmt SeqNo : %x\n",station->stationseqno); ++ LogMessage("DEBUG => [Alert_FWsam] Status : %i\n",sampacket.status); ++ LogMessage("DEBUG => [Alert_FWsam] Version : %i\n",sampacket.version); ++#endif ++ if(sampacket.status==FWSAM_STATUS_HOLD) ++ { i=FWSAM_NETHOLD; /* Stay on hold for a maximum of 60 secs (default) */ ++ while(i-- >1) /* the response packet */ ++ { waitms(10); /* wait for response */ ++ if(recv(stationsocket,encbuf,sizeof(FWsamPacket)+TwoFish_BLOCK_SIZE,0)==sizeof(FWsamPacket)+TwoFish_BLOCK_SIZE) ++ i=0; /* if we received packet we set the counter to 0. */ ++ } ++ if(!i) /* id we timed out (i was one, then dec'ed)... */ ++ { LogMessage("WARNING => [Alert_FWsam] Did not receive response from host %s. Will try again later.\n",sfip_ntoa(&station->stationip)); ++ stationtry=0; ++ sampacket.status=FWSAM_STATUS_ERROR; ++ } ++ else /* got a packet */ ++ { decbuf=(char *)&sampacket; /* get the pointer to the packet struct */ ++ len=TwoFishDecrypt(encbuf,&decbuf,sizeof(FWsamPacket)+TwoFish_BLOCK_SIZE,FALSE,station->stationfish); /* try to decrypt the packet with current key */ ++ ++ if(len!=sizeof(FWsamPacket)) /* invalid decryption */ ++ { strcpy(station->stationkey,station->initialkey); /* try the intial key */ ++ TwoFishDestroy(station->stationfish); ++ station->stationfish=TwoFishInit(station->stationkey); /* re-initialize the TwoFish with the intial key */ ++ len=TwoFishDecrypt(encbuf,&decbuf,sizeof(FWsamPacket)+TwoFish_BLOCK_SIZE,FALSE,station->stationfish); /* try again to decrypt */ ++ LogMessage("INFO => [Alert_FWsam] Had to use initial key again!\n"); ++ } ++#ifdef FWSAMDEBUG ++ LogMessage("DEBUG => [Alert_FWsam] Received %s\n",sampacket.status==FWSAM_STATUS_OK?"OK": ++ sampacket.status==FWSAM_STATUS_NEWKEY?"NEWKEY": ++ sampacket.status==FWSAM_STATUS_RESYNC?"RESYNC": ++ sampacket.status==FWSAM_STATUS_HOLD?"HOLD":"ERROR"); ++ LogMessage("DEBUG => [Alert_FWsam] Snort SeqNo: %x\n",sampacket.snortseqno[0]|(sampacket.snortseqno[1]<<8)); ++ LogMessage("DEBUG => [Alert_FWsam] Mgmt SeqNo : %x\n",station->stationseqno); ++ LogMessage("DEBUG => [Alert_FWsam] Status : %i\n",sampacket.status); ++ LogMessage("DEBUG => [Alert_FWsam] Version : %i\n",sampacket.version); ++#endif ++ if(len!=sizeof(FWsamPacket)) /* invalid decryption */ ++ { ErrorMessage("ERROR => [Alert_FWsam] Password mismatch! Ignoring host %s.\n",sfip_ntoa(&station->stationip)); ++ deletestation=TRUE; ++ sampacket.status=FWSAM_STATUS_ERROR; ++ } ++ else if(sampacket.version!=FWSAM_PACKETVERSION) /* invalid protocol version */ ++ { ErrorMessage("ERROR => [Alert_FWsam] Protocol version error! Ignoring host %s.\n",sfip_ntoa(&station->stationip)); ++ deletestation=TRUE; ++ sampacket.status=FWSAM_STATUS_ERROR; ++ } ++ else if(sampacket.status!=FWSAM_STATUS_OK && sampacket.status!=FWSAM_STATUS_NEWKEY && sampacket.status!=FWSAM_STATUS_RESYNC) ++ { ErrorMessage("ERROR => [Alert_FWsam] Funky handshake error! Ignoring host %s.\n",sfip_ntoa(&station->stationip)); ++ deletestation=TRUE; ++ sampacket.status=FWSAM_STATUS_ERROR; ++ } ++ } ++ } ++ if(sampacket.status==FWSAM_STATUS_RESYNC) /* if station want's to resync... */ ++ { strcpy(station->stationkey,station->initialkey); /* ...we use the intial key... */ ++ memcpy(station->fwkeymod,sampacket.duration,4); /* and note the random key modifier */ ++ } ++ if(sampacket.status==FWSAM_STATUS_NEWKEY || sampacket.status==FWSAM_STATUS_RESYNC) ++ { ++ FWsamNewStationKey(station,&sampacket); /* generate new TwoFish keys */ ++#ifdef FWSAMDEBUG ++ LogMessage("DEBUG => [Alert_FWsam] Generated new encryption key...\n"); ++#endif ++ } ++#ifdef WIN32 ++ closesocket(stationsocket); ++#else ++ close(stationsocket); ++#endif ++ stationtry=0; ++ } ++ else if(sampacket.status==FWSAM_STATUS_ERROR) /* if SnortSam reports an error on second try, */ ++ { ++#ifdef WIN32 ++ closesocket(stationsocket); /* something is messed up and ... */ ++#else ++ close(stationsocket); ++#endif ++ if(stationtry>1) /* we ignore that station. */ ++ { deletestation=TRUE; /* flag for deletion */ ++ ErrorMessage("ERROR => [Alert_FWsam] Could not renegotiate key! Ignoring host %s.\n",sfip_ntoa(&station->stationip)); ++ } ++ else /* if we get an error on the first try, */ ++ { if(!FWsamCheckIn(station)) /* we first try to check in again. */ ++ { deletestation=TRUE; ++ ErrorMessage("ERROR => [Alert_FWsam] Password mismatch! Ignoring host %s.\n",sfip_ntoa(&station->stationip)); ++ } ++ } ++ } ++ else /* an unknown status means trouble... */ ++ { ErrorMessage("ERROR => [Alert_FWsam] Funky handshake error! Ignoring host %s.\n",sfip_ntoa(&station->stationip)); ++#ifdef WIN32 ++ closesocket(stationsocket); ++#else ++ close(stationsocket); ++#endif ++ deletestation=TRUE; ++ } ++ } ++ else /* if the SnortSam agent uses a different packet version, we have no choice but to ignore it. */ ++ { ErrorMessage("ERROR => [Alert_FWsam] Protocol version error! Ignoring host %s.\n",sfip_ntoa(&station->stationip)); ++#ifdef WIN32 ++ closesocket(stationsocket); ++#else ++ close(stationsocket); ++#endif ++ deletestation=TRUE; ++ } ++ } ++ else /* if the intial key failed to decrypt as well, the keys are not configured the same, and we ignore that SnortSam station. */ ++ { ErrorMessage("ERROR => [Alert_FWsam] Password mismatch! Ignoring host %s.\n",sfip_ntoa(&station->stationip)); ++#ifdef WIN32 ++ closesocket(stationsocket); ++#else ++ close(stationsocket); ++#endif ++ deletestation=TRUE; ++ } ++ } ++ } ++ free(encbuf); /* release of the TwoFishAlloc'ed encryption buffer */ ++ } ++ if(stationtry==0 || deletestation) /* if everything went real well, or real bad... */ ++ { if(deletestation){ /* If it went bad, we remove the station from the list by marking the IP */ ++// station->stationip.s_addr=0; ++ station->stationip.ip32[0]=0; ++ } ++ fwsamlist=fwsamlist->next; ++ } ++ } ++ else ++ fwsamlist=fwsamlist->next; ++ } ++ } ++ else ++ { ++#ifdef FWSAMDEBUG ++ LogMessage("DEBUG => [Alert_FWsam] Skipping repetitive block.\n"); ++#endif ++ } ++ } ++} ++ ++/* FWsamCheckOut will be called when Snort exists. It de-registeres this snort sensor ++ * from the list of sensor that the SnortSam agent keeps. ++ */ ++void FWsamCheckOut(FWsamStation *station) ++{ FWsamPacket sampacket; ++ SOCKET stationsocket; ++ int i,len; ++ char *encbuf,*decbuf; ++ //unsigned char *encbuf,*decbuf; ++ ++ ++ stationsocket=socket(PF_INET,SOCK_STREAM,IPPROTO_TCP); ++ if(stationsocket==INVALID_SOCKET) ++ FatalError("ERROR => [Alert_FWsam](FWsamCheckOut) Funky socket error (socket)!\n"); ++ if(bind(stationsocket,(struct sockaddr *)&(station->localsocketaddr),sizeof(struct sockaddr))) ++ FatalError("ERROR => [Alert_FWsam](FWsamCheckOut) Could not bind socket!\n"); ++ ++ /* let's connect to the agent */ ++ if(!connect(stationsocket,(struct sockaddr *)&station->stationsocketaddr,sizeof(struct sockaddr))) ++ { LogMessage("INFO => [Alert_FWsam](FWsamCheckOut) Disconnecting from host %s.\n",sfip_ntoa(&station->stationip)); ++ /* now build the packet */ ++ station->myseqno+=station->stationseqno; /* increase my seqno */ ++ sampacket.endiancheck=1; ++ sampacket.snortseqno[0]=(char)station->myseqno; ++ sampacket.snortseqno[1]=(char)(station->myseqno>>8); ++ sampacket.fwseqno[0]=(char)station->stationseqno; /* fill station seqno */ ++ sampacket.fwseqno[1]=(char)(station->stationseqno>>8); ++ sampacket.status=FWSAM_STATUS_CHECKOUT; /* checking out... */ ++ sampacket.version=FWSAM_PACKETVERSION; ++ ++#ifdef FWSAMDEBUG ++ LogMessage("DEBUG => [Alert_FWsam](FWsamCheckOut) Sending CHECKOUT\n"); ++ LogMessage("DEBUG => [Alert_FWsam](FWsamCheckOut) Snort SeqNo: %x\n",station->myseqno); ++ LogMessage("DEBUG => [Alert_FWsam](FWsamCheckOut) Mgmt SeqNo : %x\n",station->stationseqno); ++ LogMessage("DEBUG => [Alert_FWsam](FWsamCheckOut) Status : %i\n",sampacket.status); ++ ++#endif ++ ++ encbuf=TwoFishAlloc(sizeof(FWsamPacket),FALSE,FALSE,station->stationfish); /* get encryption buffer */ ++ len=TwoFishEncrypt((char *)&sampacket,&encbuf,sizeof(FWsamPacket),FALSE,station->stationfish); /* encrypt packet with current key */ ++ ++ if(send(stationsocket,encbuf,len,0)==len) ++ { i=FWSAM_NETWAIT; ++#ifdef WIN32 ++ ioctlsocket(stationsocket,FIONBIO,&i); /* set non blocking and wait for */ ++#else ++ ioctl(stationsocket,FIONBIO,&i); /* set non blocking and wait for */ ++#endif ++ while(i-- >1) ++ { waitms(10); /* ...wait a maximum of 3 secs for response... */ ++ if(recv(stationsocket,encbuf,len,0)==len) /* ... for the status packet */ ++ i=0; ++ } ++ if(i) /* if we got the packet */ ++ { decbuf=(char *)&sampacket; ++ len=TwoFishDecrypt(encbuf,&decbuf,sizeof(FWsamPacket)+TwoFish_BLOCK_SIZE,FALSE,station->stationfish); ++ ++ if(len!=sizeof(FWsamPacket)) /* invalid decryption */ ++ { strcpy(station->stationkey,station->initialkey); /* try initial key */ ++ TwoFishDestroy(station->stationfish); /* toss this fish */ ++ station->stationfish=TwoFishInit(station->stationkey); /* re-initialze TwoFish with initial key */ ++ len=TwoFishDecrypt(encbuf,&decbuf,sizeof(FWsamPacket)+TwoFish_BLOCK_SIZE,FALSE,station->stationfish); /* and try to decrypt again */ ++ LogMessage("INFO => [Alert_FWsam](FWsamCheckOut) Had to use initial key!\n"); ++ } ++ if(len==sizeof(FWsamPacket)) /* valid decryption */ ++ { if(sampacket.version!=FWSAM_PACKETVERSION) /* but don't really care since we are on the way out */ ++ ErrorMessage("WARNING => [Alert_FWsam](FWsamCheckOut) Protocol version error! What the hell, we're quitting anyway! :)\n"); ++ } ++ else ++ ErrorMessage("WARNING => [Alert_FWsam](FWsamCheckOut) Password mismatch! What the hell, we're quitting anyway! :)\n"); ++ } ++ } ++ free(encbuf); /* release TwoFishAlloc'ed buffer */ ++ } ++ else ++ LogMessage("WARNING => [Alert_FWsam] Could not connect to host %s for CheckOut. What the hell, we're quitting anyway! :)\n",sfip_ntoa(&station->stationip)); ++#ifdef WIN32 ++ closesocket(stationsocket); ++#else ++ close(stationsocket); ++#endif ++} ++ ++ ++/* FWSamFree: Disconnects all FW-1 management stations, ++ * closes sockets, and frees the structures. ++ */ ++void FWsamFree(FWsamList *list) ++{ ++ FWsamList *next; ++ ++ while(list) /* Free pointer list for rule type */ ++ { ++ next=list->next; ++ free(list); ++ list=next; ++ } ++ list=FWsamStationList; ++ ++ while(list) /* Free global pointer list and stations */ ++ { ++ next=list->next; ++ if (list->station) ++ { ++ if(list->station->stationip.ip32[0]) ++ //if(list->station->stationip.s_addr) ++ FWsamCheckOut(list->station); /* Send a Check-Out to SnortSam, */ ++ ++ TwoFishDestroy(list->station->stationfish); /* toss the fish, */ ++ free(list->station); /* free station, */ ++ } ++ free(list); /* free pointer, */ ++ list=next; /* and move to next. */ ++ } ++ FWsamStationList=NULL; ++ if(FWsamOptionField) ++ free(FWsamOptionField); ++} ++ ++void AlertFWsamCleanExitFunc(int signal, void *arg) ++{ FWsamList *fwsamlist; ++ ++#ifdef FWSAMDEBUG ++ LogMessage("DEBUG => [Alert_FWsam](AlertFWsamCleanExitFunc) Exiting...\n"); ++#endif ++ ++ fwsamlist=(FWsamList *)arg; ++ FWsamFree(fwsamlist); /* Free all elements */ ++} ++ ++void AlertFWsamRestartFunc(int signal, void *arg) ++{ FWsamList *fwsamlist; ++ ++#ifdef FWSAMDEBUG ++ LogMessage("DEBUG => [Alert_FWsam](AlertFWsamRestartFunc) Restarting...\n"); ++#endif ++ ++ fwsamlist=(FWsamList *)arg; ++ FWsamFree(fwsamlist); /* Free all elements */ ++} ++ ++/* This routine registers this Snort sensor with SnortSam. ++ * It will also change the encryption key based on some variables. ++ */ ++int FWsamCheckIn(FWsamStation *station) ++{ int i,len,stationok=TRUE; ++ FWsamPacket sampacket; ++ char *encbuf,*decbuf; ++ //unsigned char *encbuf,*decbuf; ++ SOCKET stationsocket; ++ ++ ++ /* create a socket for the station */ ++ stationsocket=socket(PF_INET,SOCK_STREAM,IPPROTO_TCP); ++ if(stationsocket==INVALID_SOCKET) ++ FatalError("ERROR => [Alert_FWsam](FWsamCheckIn) Funky socket error (socket)!\n"); ++ if(bind(stationsocket,(struct sockaddr *)&(station->localsocketaddr),sizeof(struct sockaddr))) ++ FatalError("ERROR => [Alert_FWsam](FWsamCheckIn) Could not bind socket!\n"); ++ ++ i=TRUE; ++ /* let's connect to the agent */ ++ if(connect(stationsocket,(struct sockaddr *)&station->stationsocketaddr,sizeof(struct sockaddr))) ++ LogMessage("WARNING => [Alert_FWsam](FWsamCheckIn) Could not connect to host %s. Will try later.\n",sfip_ntoa(&station->stationip)); ++ else ++ { LogMessage("INFO => [Alert_FWsam](FWsamCheckIn) Connected to host %s.\n",sfip_ntoa(&station->stationip)); ++ /* now build the packet */ ++ sampacket.endiancheck=1; ++ sampacket.snortseqno[0]=(char)station->myseqno; /* fill my sequence number number */ ++ sampacket.snortseqno[1]=(char)(station->myseqno>>8); /* fill my sequence number number */ ++ sampacket.status=FWSAM_STATUS_CHECKIN; /* let's check in */ ++ sampacket.version=FWSAM_PACKETVERSION; /* set the packet version */ ++ memcpy(sampacket.duration,station->mykeymod,4); /* we'll send SnortSam our key modifier in the duration slot */ ++ /* (the checkin packet is just the plain initial key) */ ++#ifdef FWSAMDEBUG ++ LogMessage("DEBUG => [Alert_FWsam](FWsamCheckIn) Sending CheckIn\n"); ++ LogMessage("DEBUG => [Alert_FWsam](FWsamCheckIn) Snort SeqNo: %x\n",station->myseqno); ++ LogMessage("DEBUG => [Alert_FWsam](FWsamCheckIn) Mode : %i\n",sampacket.status); ++ LogMessage("DEBUG => [Alert_FWsam](FWsamCheckIn) Version : %i\n",sampacket.version); ++#endif ++ encbuf=TwoFishAlloc(sizeof(FWsamPacket),FALSE,FALSE,station->stationfish); /* get buffer for encryption */ ++ len=TwoFishEncrypt((char *)&sampacket,&encbuf,sizeof(FWsamPacket),FALSE,station->stationfish); /* encrypt with initial key */ ++ if(send(stationsocket,encbuf,len,0)!=len) /* weird...could not send */ ++ LogMessage("WARNING => [Alert_FWsam](FWsamCheckIn) Could not send to host %s. Will try again later.\n",sfip_ntoa(&station->stationip)); ++ else ++ { i=FWSAM_NETWAIT; ++#ifdef WIN32 ++ ioctlsocket(stationsocket,FIONBIO,&i); /* set non blocking and wait for */ ++#else ++ ioctl(stationsocket,FIONBIO,&i); /* set non blocking and wait for */ ++#endif ++ while(i-- >1) ++ { waitms(10); /* wait a maximum of 3 secs for response */ ++ if(recv(stationsocket,encbuf,len,0)==len) ++ i=0; ++ } ++ if(!i) /* time up? */ ++ LogMessage("WARNING => [Alert_FWsam](FWsamCheckIn) Did not receive response from host %s. Will try again later.\n",sfip_ntoa(&station->stationip)); ++ else ++ { decbuf=(char *)&sampacket; /* got status packet */ ++ len=TwoFishDecrypt(encbuf,&decbuf,sizeof(FWsamPacket)+TwoFish_BLOCK_SIZE,FALSE,station->stationfish); /* try to decrypt with initial key */ ++ if(len==sizeof(FWsamPacket)) /* valid decryption */ ++ { ++#ifdef FWSAMDEBUG ++ LogMessage("DEBUG => [Alert_FWsam](FWsamCheckIn) Received %s\n",sampacket.status==FWSAM_STATUS_OK?"OK": ++ sampacket.status==FWSAM_STATUS_NEWKEY?"NEWKEY": ++ sampacket.status==FWSAM_STATUS_RESYNC?"RESYNC": ++ sampacket.status==FWSAM_STATUS_HOLD?"HOLD":"ERROR"); ++ LogMessage("DEBUG => [Alert_FWsam](FWsamCheckIn) Snort SeqNo: %x\n",sampacket.snortseqno[0]|(sampacket.snortseqno[1]<<8)); ++ LogMessage("DEBUG => [Alert_FWsam](FWsamCheckIn) Mgmt SeqNo : %x\n",sampacket.fwseqno[0]|(sampacket.fwseqno[1]<<8)); ++ LogMessage("DEBUG => [Alert_FWsam](FWsamCheckIn) Status : %i\n",sampacket.status); ++ LogMessage("DEBUG => [Alert_FWsam](FWsamCheckIn) Version : %i\n",sampacket.version); ++#endif ++ if(sampacket.version==FWSAM_PACKETVERSION) /* master speaks my language */ ++ { if(sampacket.status==FWSAM_STATUS_OK || sampacket.status==FWSAM_STATUS_NEWKEY || sampacket.status==FWSAM_STATUS_RESYNC) ++ { station->stationseqno=sampacket.fwseqno[0]|(sampacket.fwseqno[1]<<8); /* get stations seqno */ ++ station->lastcontact=(unsigned long)time(NULL); ++ ++ if(sampacket.status==FWSAM_STATUS_NEWKEY || sampacket.status==FWSAM_STATUS_RESYNC) /* generate new keys */ ++ { memcpy(station->fwkeymod,sampacket.duration,4); /* note the key modifier */ ++ FWsamNewStationKey(station,&sampacket); /* and generate new TwoFish keys (with key modifiers) */ ++#ifdef FWSAMDEBUG ++ LogMessage("DEBUG => [Alert_FWsam](FWsamCheckIn) Generated new encryption key...\n"); ++#endif ++ } ++ } ++ else /* weird, got a strange status back */ ++ { ErrorMessage("ERROR => [Alert_FWsam](FWsamCheckIn) Funky handshake error! Ignoring host %s.\n",sfip_ntoa(&station->stationip)); ++ stationok=FALSE; ++ } ++ } ++ else /* packet version does not match */ ++ { ErrorMessage("ERROR =>[Alert_FWsam](FWsamCheckIn) Protocol version error! Ignoring host %s.\n",sfip_ntoa(&station->stationip)); ++ stationok=FALSE; ++ } ++ } ++ else /* key does not match */ ++ { ErrorMessage("ERROR => [Alert_FWsam](FWsamCheckIn) Password mismatch! Ignoring host %s.\n",sfip_ntoa(&station->stationip)); ++ stationok=FALSE; ++ } ++ } ++ } ++ free(encbuf); /* release TwoFishAlloc'ed buffer */ ++ } ++#ifdef WIN32 ++ closesocket(stationsocket); ++#else ++ close(stationsocket); ++#endif ++ return stationok; ++} ++#undef FWSAMDEBUG ++ + +Index: snort-2.8.6.1/src/output-plugins/spo_alert_fwsam.h +=================================================================== +--- snort-2.8.6.1/src/output-plugins/spo_alert_fwsam.h (Revision 0) ++++ snort-2.8.6.1/src/output-plugins/spo_alert_fwsam.h (Revision 3) +@@ -0,0 +1,216 @@ ++/* $Id: snortpatchb,v 1.5 2005/10/06 08:50:39 fknobbe Exp $ ++** ++** spo_alert_fwsam.h ++** ++** Copyright (c) 2001-2004 Frank Knobbe <frank@knobbe.us> ++** ++** 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 the Free Software ++** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. ++*/ ++ ++/* This file gets included in plugbase.c when it is integrated into the rest ++ * of the program. ++ * ++ * For more info, see the beginning of spo_alert_fwsam.c ++ * ++ */ ++ ++#ifndef __SPO_FWSAM_H__ ++#define __SPO_FWSAM_H__ ++ ++#include "snort.h" ++#include "rules.h" ++#include "plugbase.h" ++#include "plugin_enum.h" ++#include "fatal.h" ++#include "util.h" ++#include "twofish.h" ++ ++#include <stdlib.h> ++#include <stdio.h> ++#include <time.h> ++#include <string.h> ++#include <ctype.h> ++#include <unistd.h> ++ ++ ++/* just some compatibility stuff */ ++#ifdef WIN32 ++#if !defined(_WINSOCKAPI_) && !defined(_WINSOCK2API_) ++#include <winsock.h> ++#endif ++#define waitms(x) Sleep(x) ++ ++#else ++ ++#include <sys/socket.h> ++#include <netinet/in.h> ++#include <arpa/inet.h> ++#include <sys/ioctl.h> ++#include <netdb.h> ++ ++#ifdef SOLARIS ++#include <sys/filio.h> ++#endif ++ ++typedef int SOCKET; ++ ++#ifndef INVALID_SOCKET ++#define INVALID_SOCKET -1 ++#endif ++ ++#define waitms(x) usleep((x)*1000) ++ ++#endif ++ ++#ifndef FALSE ++#define FALSE 0 ++#endif ++#ifndef TRUE ++#define TRUE !FALSE ++#endif ++#ifndef bool ++#define bool int ++#endif ++ ++ ++#if defined(_DEBUG) || defined(DEBUG) ++#ifndef FWSAMDEBUG ++#define FWSAMDEBUG ++#endif ++#else ++#endif ++ ++ ++/* Official Snort PlugIn Number has been moved into plugin_enum.h */ ++ ++ ++/* fixed defines */ ++ ++#define FWSAM_DEFAULTPORT 898 /* Default port if user does not specify one in snort.conf */ ++ /* (Was unused last time I checked...) */ ++#define FWSAM_PACKETVERSION 14 /* version of the packet. Will increase with enhancements. */ ++ ++#define FWSAM_STATUS_CHECKIN 1 /* snort to fw */ ++#define FWSAM_STATUS_CHECKOUT 2 ++#define FWSAM_STATUS_BLOCK 3 ++#define FWSAM_STATUS_UNBLOCK 9 ++ ++#define FWSAM_STATUS_OK 4 /* fw to snort */ ++#define FWSAM_STATUS_ERROR 5 ++#define FWSAM_STATUS_NEWKEY 6 ++#define FWSAM_STATUS_RESYNC 7 ++#define FWSAM_STATUS_HOLD 8 ++ ++#define FWSAM_LOG_NONE 0 ++#define FWSAM_LOG_SHORTLOG 1 ++#define FWSAM_LOG_SHORTALERT 2 ++#define FWSAM_LOG_LONGLOG 3 ++#define FWSAM_LOG_LONGALERT 4 ++#define FWSAM_LOG (FWSAM_LOG_SHORTLOG|FWSAM_LOG_SHORTALERT|FWSAM_LOG_LONGLOG|FWSAM_LOG_LONGALERT) ++#define FWSAM_WHO_DST 8 ++#define FWSAM_WHO_SRC 16 ++#define FWSAM_WHO (FWSAM_WHO_DST|FWSAM_WHO_SRC) ++#define FWSAM_HOW_IN 32 ++#define FWSAM_HOW_OUT 64 ++#define FWSAM_HOW_INOUT (FWSAM_HOW_IN|FWSAM_HOW_OUT) ++#define FWSAM_HOW_THIS 128 ++#define FWSAM_HOW (FWSAM_HOW_IN|FWSAM_HOW_OUT|FWSAM_HOW_THIS) ++ ++ ++/* user adjustable defines */ ++ ++#define FWSAM_REPET_BLOCKS 10 /* Snort remembers this amount of last blocks and... */ ++#define FWSAM_REPET_TIME 20 /* ...checks if they fall within this time. If so,... */ ++ /* ...the blocking request is not send. */ ++ ++#define FWSAM_NETWAIT 300 /* 100th of a second. 3 sec timeout for network connections */ ++#define FWSAM_NETHOLD 6000 /* 100th of a second. 60 sec timeout for holding */ ++ ++#define SID_MAPFILE "sid-block.map" ++#define SID_ALT_MAPFILE "sid-fwsam.map" ++ ++#define FWSAM_FANCYFETCH /* This will invoke a fast sid lookup routine */ ++ ++ ++/* vars */ ++ ++typedef struct _FWsamstation /* structure of a mgmt station */ ++{ unsigned short myseqno; ++ unsigned short stationseqno; ++ unsigned char mykeymod[4]; ++ unsigned char fwkeymod[4]; ++ unsigned short stationport; ++ //struct in_addr stationip; ++ sfip_t stationip; ++ struct sockaddr_in localsocketaddr; ++ struct sockaddr_in stationsocketaddr; ++ TWOFISH *stationfish; ++ char initialkey[TwoFish_KEY_LENGTH+2]; ++ char stationkey[TwoFish_KEY_LENGTH+2]; ++ time_t lastcontact; ++/* time_t sleepstart; */ ++} FWsamStation; ++ ++typedef struct _FWsampacket /* 2 blocks (3rd block is header from TwoFish) */ ++{ unsigned short endiancheck; /* 0 */ ++ unsigned char srcip[4]; /* 2 */ ++ unsigned char dstip[4]; /* 6 */ ++ unsigned char duration[4]; /* 10 */ ++ unsigned char snortseqno[2]; /* 14 */ ++ unsigned char fwseqno[2]; /* 16 */ ++ unsigned char srcport[2]; /* 18 */ ++ unsigned char dstport[2]; /* 20 */ ++ unsigned char protocol[2]; /* 22 */ ++ unsigned char fwmode; /* 24 */ ++ unsigned char version; /* 25 */ ++ unsigned char status; /* 26 */ ++ unsigned char sig_id[4]; /* 27 */ ++ unsigned char fluff; /* 31 */ ++} FWsamPacket; /* 32 bytes in size */ ++ ++typedef struct _FWsamoptions /* snort rule options */ ++{ unsigned long sid; ++ unsigned long duration; ++ unsigned char who; ++ unsigned char how; ++ unsigned char loglevel; ++} FWsamOptions; ++ ++typedef struct _FWsamlistpointer ++{ FWsamStation *station; ++ struct _FWsamlistpointer *next; ++} FWsamList; ++ ++ ++/* functions */ ++void AlertFWsamSetup(void); ++void AlertFWsamInit(char *args); ++void AlertFWsamOptionInit(char *args,OptTreeNode *otn,int protocol); ++void AlertFWsamCleanExitFunc(int signal, void *arg); ++void AlertFWsamRestartFunc(int signal, void *arg); ++void AlertFWsam(Packet *p, char *msg, void *arg, Event *event); ++int FWsamCheckIn(FWsamStation *station); ++void FWsamCheckOut(FWsamStation *station); ++void FWsamNewStationKey(FWsamStation *station,FWsamPacket *packet); ++void FWsamFixPacketEndian(FWsamPacket *p); ++unsigned long FWsamParseDuration(char *p); ++void FWsamFree(FWsamList *fwsamlist); ++int FWsamStationExists(FWsamStation *who,FWsamList *list); ++int FWsamReadLine(char *,unsigned long,FILE *); ++void FWsamParseLine(FWsamOptions *,char *); ++FWsamOptions *FWsamGetOption(unsigned long); ++int FWsamParseOption(FWsamOptions *,char *); ++ ++#endif /* __SPO_FWSAM_H__ */ + +Index: snort-2.8.6.1/src/output-plugins/Makefile.am +=================================================================== +--- snort-2.8.6.1/src/output-plugins/Makefile.am (Revision 1) ++++ snort-2.8.6.1/src/output-plugins/Makefile.am (Revision 3) +@@ -11,6 +11,7 @@ + spo_log_tcpdump.h spo_unified.c spo_unified2.c spo_unified.h spo_unified2.h \ + spo_log_ascii.c spo_log_ascii.h spo_alert_sf_socket.h spo_alert_sf_socket.c \ + spo_alert_prelude.c spo_alert_prelude.h spo_alert_arubaaction.c spo_alert_arubaaction.h \ ++spo_alert_fwsam.c spo_alert_fwsam.h \ + spo_alert_test.c spo_alert_test.h + + INCLUDES = @INCLUDES@ +Index: snort-2.8.6.1/src/plugbase.c +=================================================================== +--- snort-2.8.6.1/src/plugbase.c (Revision 1) ++++ snort-2.8.6.1/src/plugbase.c (Revision 3) +@@ -125,6 +125,7 @@ + #endif + + #include "output-plugins/spo_alert_test.h" ++#include "output-plugins/spo_alert_fwsam.h" + + extern ListHead *head_tmp; + extern PreprocConfigFuncNode *preproc_config_funcs; +@@ -1240,6 +1241,7 @@ + #endif + + AlertTestSetup(); ++ AlertFWsamSetup(); + } + + /**************************************************************************** +Index: snort-2.8.6.1/src/Makefile.am +=================================================================== +--- snort-2.8.6.1/src/Makefile.am (Revision 1) ++++ snort-2.8.6.1/src/Makefile.am (Revision 3) +@@ -52,7 +52,8 @@ + detection_filter.c detection_filter.h \ + rate_filter.c rate_filter.h \ + obfuscation.c obfuscation.h \ +-rule_option_types.h ++rule_option_types.h \ ++twofish.c twofish.h + + snort_LDADD = output-plugins/libspo.a \ + detection-plugins/libspd.a \ +Index: snort-2.8.6.1/autojunk.sh +=================================================================== +--- snort-2.8.6.1/autojunk.sh (Revision 0) ++++ snort-2.8.6.1/autojunk.sh (Revision 3) +@@ -0,0 +1,7 @@ ++#!/bin/sh ++# the list of commands that need to run before we do a compile ++libtoolize --automake --copy ++aclocal -I m4 ++autoheader ++automake --add-missing --copy ++autoconf + +Index: snort-2.8.6.1/etc/snort.conf +=================================================================== +--- snort-2.8.6.1/etc/snort.conf (Revision 1) ++++ snort-2.8.6.1/etc/snort.conf (Revision 3) +@@ -277,6 +277,32 @@ + # prelude + # output alert_prelude + ++# snortsam ++# In order to cause Snort to send a blocking request to the SnortSam agent, ++# that agent has to be listed, including the port it listens on, ++# and the encryption key it is using. The statement for that is: ++# ++# output alert_fwsam: {SnortSam Station}:{port}/{password} ++# ++# {SnortSam Station}: IP address or host name of the host where SnortSam is running. ++# {port}: The port the remote SnortSam agent listens on. ++# {password}: The password, or key, used for encryption of the ++# communication to the remote agent. ++# ++# At the very least, the IP address or host name of the host running SnortSam ++# needs to be specified. If the port is omitted, it defaults to TCP port 898. ++# If the password is omitted, it defaults to a preset password. ++# (In which case it needs to be omitted on the SnortSam agent as well) ++# ++# More than one host can be specified, but has to be done on the same line. ++# Just separate them with one or more spaces. ++# ++# Examples: ++# ++# output alert_fwsam: firewall/idspassword ++# output alert_fwsam: fw1.domain.tld:898/mykey ++# output alert_fwsam: 192.168.0.1/borderfw 192.168.1.254/wanfw ++ + # metadata reference data. do not modify these lines + include classification.config + include reference.config |