string ookAESCipher::Decrypt(string msg)
{
// Recovered Text Sink
std::string RecoveredText;
// Decryptor
CryptoPP::CFB_Mode< CryptoPP::AES >::Decryption Decryptor( _keybytes, CryptoPP::AES::DEFAULT_KEYLENGTH );
// Decryption
CryptoPP::StringSource( msg, true,
new CryptoPP::StreamTransformationFilter( Decryptor,
new CryptoPP::StringSink( RecoveredText )
) // StreamTransformationFilter
); // StringSource
return RecoveredText;
}
string ookBlowfishCipher::Decrypt(string msg)
{
// Recovered Text Sink
std::string RecoveredText;
// Decryptor
CryptoPP::CFB_Mode< CryptoPP::Blowfish >::Decryption Decryptor( _keybytes, CryptoPP::Blowfish::DEFAULT_KEYLENGTH );
// Decryption
CryptoPP::StringSource( msg, true,
new CryptoPP::StreamTransformationFilter( Decryptor,
new CryptoPP::StringSink( RecoveredText )
) // StreamTransformationFilter
); // StringSource
return RecoveredText;
/*
ucstring rRet;
for(int i = 0; i < msg.size(); i += _BLOCK_SIZE)
{
vector<uchar> vchunk;
vector<uchar> rchunk;
//Pull a block size chunk off of our input vector
for(int j=i; (j - i) < _BLOCK_SIZE; j++)
vchunk.push_back(msg[j]);
//Decrypt the chunk
rchunk = Decode(vchunk);
//Push the results onto our return vector
for(int k=0; k < _BLOCK_SIZE; k++)
rRet += rchunk[k];
}
return rRet;
*/
// return "";
}
int main(int argc, char* argv[]) {
try
{
// Key and IV setup
byte key[ CryptoPP::CIPHER::DEFAULT_KEYLENGTH ],
iv[ CryptoPP::CIPHER::BLOCKSIZE ];
::memset( key, 0x01, CryptoPP::CIPHER::DEFAULT_KEYLENGTH );
::memset( iv, 0x01, CryptoPP::CIPHER::BLOCKSIZE );
// Message M
std::string PlainText = "Yoda said, Do or Do Not. There is no try.";
// Cipher Text Sink
std::string CipherText;
// Encryptor
CryptoPP::CIPHER_MODE<CryptoPP::CIPHER>::Encryption
Encryptor( key, sizeof(key), iv );
// Encryption
CryptoPP::StringSource( PlainText, true,
new CryptoPP::StreamTransformationFilter( Encryptor,
new CryptoPP::StringSink( CipherText )
) // StreamTransformationFilter
); // StringSource
///////////////////////////////////////
// DMZ //
///////////////////////////////////////
// Recovered Text Sink
std::string RecoveredText;
// Decryptor
CryptoPP::CIPHER_MODE<CryptoPP::CIPHER>::Decryption
Decryptor( key, sizeof(key), iv );
// Decryption
CryptoPP::StringSource( CipherText, true,
new CryptoPP::StreamTransformationFilter( Decryptor,
new CryptoPP::StringSink( RecoveredText )
) // StreamTransformationFilter
); // StringSource
//////////////////////////////////////////
// Output //
//////////////////////////////////////////
std::cout << "Algorithm:" << std::endl;
std::cout << " " << Encryptor.AlgorithmName() << std::endl;
std::cout << "Minimum Key Size:" << std::endl;
std::cout << " " << Encryptor.MinKeyLength() << " bytes" << std::endl;
std::cout << std::endl;
std::cout << "Plain Text (" << PlainText.length() << " bytes)" << std::endl;
std::cout << " '" << PlainText << "'" << std::endl;
std::cout << std::endl;
std::cout << "Cipher Text Size:" << std::endl;
std::cout << " " << CipherText.size() << " bytes" << std::endl;
std::cout << std::endl;
std::cout << "Cipher Text :" << std::endl;
std::cout << "[" << CipherText << "]" << std::endl;
std::cout << std::endl;
std::cout << "Recovered Text:" << std::endl;
std::cout << " '" << RecoveredText << "'" << std::endl;
std::cout << std::endl;
}
catch( CryptoPP::Exception& e)
{
std::cerr << e.what() << std::endl;
}
catch(...)
{
std::cerr << "Unknown Error" << std::endl;
}
return 0;
}
