string AES::crypt(string plaintext, string key){
string ciphertext;
CryptoPP::AES::Encryption aesEncryption((byte*)key.c_str(), CryptoPP::AES::DEFAULT_KEYLENGTH);
CryptoPP::CBC_Mode_ExternalCipher::Encryption cbcEncryption( aesEncryption, iv );
CryptoPP::StreamTransformationFilter stfEncryptor(cbcEncryption, new CryptoPP::StringSink( ciphertext ) );
stfEncryptor.Put( reinterpret_cast<const unsigned char*>( plaintext.c_str() ), plaintext.length() + 1 );
stfEncryptor.MessageEnd();
return ciphertext;
}
void cryptos::_sha_encrypt(const bybuff& key, const bybuff& data, bybuff& out)const
{
//Key and IV setup
//AES encryption uses a secret key of a variable length (128-bit, 196-bit or 256-
//bit). This key is secretly exchanged between two parties before communication
//begins. DEFAULT_KEYLENGTH= 16 bytes
//uint8_t iv[ CryptoPP::AES::BLOCKSIZE ] = {0};
std::string encoded;
try{
#if 0
CryptoPP::AES::Encryption aesEncryption(key.buffer(), key.length());
CryptoPP::CBC_Mode_ExternalCipher::Encryption cbcEncryption( aesEncryption, iv );
CryptoPP::StreamTransformationFilter stfEncryptor(cbcEncryption, new CryptoPP::StringSink( encoded ) );
stfEncryptor.Put( data.buffer(), (size_t)data.length() );
stfEncryptor.MessageEnd();
out = encoded;
_TRACE("_sha_e(" << key.to_string() <<","<< data.to_string() <<")=" << out.to_string());
bybuff r;
_sha_decrypt(key, out, r);
#endif //0
CryptoPP::ECB_Mode< CryptoPP::AES >::Encryption aes_128_ecb;//(key.buffer(), key.length(), iv);
aes_128_ecb.SetKey( key.buffer(), key.length() );
CryptoPP::StreamTransformationFilter encryptor(aes_128_ecb, 0, CryptoPP::BlockPaddingSchemeDef::NO_PADDING);
for(size_t j = 0; j < data.length(); j++)
{
encryptor.Put((byte)data[j]);
}
encryptor.MessageEnd();
size_t ready = encryptor.MaxRetrievable();
byte outa[32] = {0};
encryptor.Get((byte*) outa, ready);
out.append(outa, ready);
}
catch( CryptoPP::Exception& e )
{
ERROR( e.what());
assert(0);
}
// bybuff r;
//_sha_decrypt(key, out, r);
}
int main(int argc, char* argv[]) {
//Key and IV setup
//AES encryption uses a secret key of a variable length (128-bit, 196-bit or 256-
//bit). This key is secretly exchanged between two parties before communication
//begins. DEFAULT_KEYLENGTH= 16 bytes
byte key[ CryptoPP::AES::DEFAULT_KEYLENGTH ], iv[ CryptoPP::AES::BLOCKSIZE ];
memset( key, 0x00, CryptoPP::AES::DEFAULT_KEYLENGTH );
memset( iv, 0x00, CryptoPP::AES::BLOCKSIZE );
//
// String and Sink setup
//
std::string plaintext = "Now is the time for all good men to come to the aide...";
std::string ciphertext;
std::string decryptedtext;
//
// Dump Plain Text
//
std::cout << "Plain Text (" << plaintext.size() << " bytes)" << std::endl;
std::cout << plaintext;
std::cout << std::endl << std::endl;
//
// Create Cipher Text
//
CryptoPP::AES::Encryption aesEncryption(key, CryptoPP::AES::DEFAULT_KEYLENGTH);
CryptoPP::CBC_Mode_ExternalCipher::Encryption cbcEncryption( aesEncryption, iv );
CryptoPP::StreamTransformationFilter stfEncryptor(cbcEncryption, new CryptoPP::StringSink( ciphertext ) );
stfEncryptor.Put( reinterpret_cast<const unsigned char*>( plaintext.c_str() ), plaintext.length() + 1 );
stfEncryptor.MessageEnd();
//
// Dump Cipher Text
//
std::cout << "Cipher Text (" << ciphertext.size() << " bytes)" << std::endl;
for( int i = 0; i < ciphertext.size(); i++ ) {
std::cout << "0x" << std::hex << (0xFF & static_cast<byte>(ciphertext[i])) << " ";
}
std::cout << std::endl << std::endl;
//
// Decrypt
//
CryptoPP::AES::Decryption aesDecryption(key, CryptoPP::AES::DEFAULT_KEYLENGTH);
CryptoPP::CBC_Mode_ExternalCipher::Decryption cbcDecryption( aesDecryption, iv );
CryptoPP::StreamTransformationFilter stfDecryptor(cbcDecryption, new CryptoPP::StringSink( decryptedtext ) );
stfDecryptor.Put( reinterpret_cast<const unsigned char*>( ciphertext.c_str() ), ciphertext.size() );
stfDecryptor.MessageEnd();
//
// Dump Decrypted Text
//
std::cout << "Decrypted Text: " << std::endl;
std::cout << decryptedtext;
std::cout << std::endl << std::endl;
return 0;
}
