RSA OAEP Padding

Demonstrates how to use OAEP padding with the RSA encryption algorithm. More information about OAEP Padding.

Download 32-bit Chilkat RSA ActiveX (.msi)

Download All 32-bit Chilkat ActiveX Components (.zip)

Download All 64-bit Chilkat ActiveX Components (.zip)

uses
    Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
    Dialogs, StdCtrls,
    CHILKATRSALib_TLB,
    OleCtrls;

...

procedure TForm1.Button1Click(Sender: TObject);
var
rsa: TChilkatRsa;
success: Integer;
publicKey: String;
plainText: String;
usePrivateKey: Integer;
encryptedStr: String;

begin
rsa := TChilkatRsa.Create(Self);

success := rsa.UnlockComponent('Anything for 30-day trial');
if (success <> 1) then
  begin
    ShowMessage('RSA component unlock failed');

  end;

//  RSA public key in XML format:
publicKey := '<RSAKeyValue><Modulus>of3im3mRgd2NLXIGoK6uYLg6jj0Ug2b42rnqa5Tbwz2ieFqMJqt+++x2oqLYGurlz49nt+7/785g3XYWqoka4u9c9zul6YubIjnBM72dQy7rEkEfbUxgjcxqXyjZFx+FpaxFUecLu688XEu+9UA42VKiCgcl+E7TrqnfeeYpNXc=</Modulus><Exponent>AQAB</Exponent></RSAKeyValue>';

rsa.ImportPublicKey(publicKey);

//  To use Optimal Asymmetric Encryption Padding (OAEP) padding,
//  simply set the OaepPadding property:
rsa.OaepPadding := 1;

//  Encrypt a string and return the encrypted data base64-encoded:
rsa.EncodingMode := 'base64';

plainText := 'RSA Encryption should be easy.';

usePrivateKey := 0;
encryptedStr := rsa.EncryptStringENC(plainText,usePrivateKey);
Memo1.Lines.Add(encryptedStr);
end;