Hello Everyone,
I'm moving myself from my own C AES C Library to Crypto++.
In Crypto++ Wiki we have an example of AES ECB Encryption:
AutoSeededRandomPool prng;
SecByteBlock key(AES::DEFAULT_KEYLENGTH);
prng.GenerateBlock( key, key.size() );
string plain = "ECB Mode Test";
string cipher, encoded, recovered;
/*********************************\
\*********************************/
try
{
cout << "plain text: " << plain << endl;
ECB_Mode< AES >::Encryption e;
e.SetKey( key, key.size() );
// The StreamTransformationFilter adds padding
// as required. ECB and CBC Mode must be padded
// to the block size of the cipher.
StringSource ss1( plain, true,
new StreamTransformationFilter( e,
new StringSink( cipher )
) // StreamTransformationFilter
); // StringSource
}
catch( CryptoPP::Exception& e )
{
cerr << e.what() << endl;
exit(1);
}
/*********************************\
\*********************************/
// Pretty print cipher text
StringSource ss2( cipher, true,
new HexEncoder(
new StringSink( encoded )
) // HexEncoder
); // StringSource
cout << "cipher text: " << encoded << endl;
/*********************************\
\*********************************/
Can Somebody explain me where exactly in this piece of code encryption have
place?
In C library I have function which I have to call to encrypt data, it look
similar to
encrypt(plain_text, cipher_text, key);
I know that encryption is made in try{} block, but I see only class
declaration, key setting and after that is StringSource which Is transform
bytes into string.
Thank in advance for any help,
Daniel
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