File-to-File 256-bit AES Encryption

Download Chilkat Crypt ActiveX

File-to-file AES encryption example. There is no limitation on the size of the file that can be encrypted or decrypted. The component will (internally) operating in streaming mode to encrypt/decrypt to prevent large memory usage.

procedure TForm1.Button5Click(Sender: TObject);
begin
    ChilkatCrypt21.UnlockComponent('test');
    ChilkatCrypt21.CryptAlgorithm := 'aes';
    // KeyLength can be 128-bit, 192-bit, or 256-bit
    ChilkatCrypt21.KeyLength := 256;
    ChilkatCrypt21.SecretKey := ChilkatCrypt21.GenerateSecretKey('password');
    // File-to-file encryption.
    ChilkatCrypt21.CkEncryptFile('fileData.txt','encryptedFileData.dat');
    // Now decrypt...
    ChilkatCrypt21.CkDecryptFile('encryptedFileData.dat','decrypted.txt');
end;