1 /* 2 * steghide 0.5.1 - a steganography program 3 * Copyright (C) 1999-2003 Stefan Hetzl <shetzl@chello.at> 4 * 5 * This program is free software; you can redistribute it and/or 6 * modify it under the terms of the GNU General Public License 7 * as published by the Free Software Foundation; either version 2 8 * of the License, or (at your option) any later version. 9 * 10 * This program is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 * GNU General Public License for more details. 14 * 15 * You should have received a copy of the GNU General Public License 16 * along with this program; if not, write to the Free Software 17 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 18 * 19 */ 20 21 #ifndef SH_MHASHPP_H 22 #define SH_MHASHPP_H 23 24 #define _Bool bool 25 #include <mhash.h> 26 27 #include "common.h" 28 29 class BitString ; 30 31 class MHashPP { 32 public: 33 enum Command { endhash } ; 34 35 MHashPP (void) ; 36 MHashPP (hashid a) ; 37 38 void init (hashid a) ; 39 40 const std::vector<BYTE>& end (void) ; 41 42 /** 43 * feed the std::string v to the hashing algorithm 44 * \param v the std::string to be feeded to the hashing algorithm (without '\0' at the end) 45 **/ 46 MHashPP& operator<< (std::string v) ; 47 48 /** 49 * feed the BitString v to the hashing algorithm 50 * \param v the BitString to be feeded to the hashing algorithm (v.getLength() % 8 == 0 must hold) 51 **/ 52 MHashPP& operator<< (BitString v) ; 53 54 /** 55 * feed the byte v to the hashing algorithm 56 * \param v the byte to be feeded to the hashing algorithm 57 **/ 58 MHashPP& operator<< (BYTE v) ; 59 60 /** 61 * interpret the command c 62 * \param c a command (member of MHashPP::Command) 63 **/ 64 MHashPP& operator<< (Command c) ; 65 66 /** 67 * get the hash bits 68 * \return the hash value of the data that has been passed via << 69 **/ 70 BitString getHashBits (void) ; 71 72 const std::vector<BYTE>& getHashBytes (void) ; 73 74 /** 75 * get the hash size 76 * \return the size of the value returned by getHashBits in bytes 77 **/ 78 unsigned int getHashSize (void) ; 79 80 private: 81 /// true iff HashD contains a legal hash descriptor and data can be passed via << 82 bool hashing ; 83 MHASH HashD ; 84 85 /// true iff HashBytes contains a valid hash value 86 bool HashBytesValid ; 87 std::vector<BYTE> HashBytes ; 88 89 std::string getAlgorithmName (void) ; 90 static std::string getAlgorithmName (hashid id) ; 91 } ; 92 93 #endif // ndef SH_MHASHPP_H 94