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(Delphi ActiveX) RSA OAEP PaddingDemonstrates how to use OAEP padding with the RSA encryption algorithm. More information about OAEP Padding. Note: This example requires Chilkat v11.0.0 or greater.
uses Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics, Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Chilkat_TLB; ... procedure TForm1.Button1Click(Sender: TObject); var success: Integer; rsa: TChilkatRsa; pubKeyXml: WideString; pubKey: TPublicKey; plainText: WideString; usePrivateKey: Integer; encryptedStr: WideString; begin success := 0; // This example assumes the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. rsa := TChilkatRsa.Create(Self); // RSA public key in XML format: pubKeyXml := '<RSAPublicKey><Modulus>of3im3mRgd2NLXIGoK6uYLg6jj0Ug2b42rnqa5Tbwz2ieFqMJqt+++x2oqLYGurlz49nt+7/785g3XYWqoka4u9c9zul6YubIjnBM72dQy7rEkEfbUxgjcxqXyjZFx+FpaxFUecLu688XEu+9UA42VKiCgcl+E7TrqnfeeYpNXc=</Modulus><Exponent>AQAB</Exponent></RSAPublicKey>'; pubKey := TPublicKey.Create(Self); success := pubKey.LoadFromString(pubKeyXml); if (success = 0) then begin Memo1.Lines.Add(pubKey.LastErrorText); Exit; end; success := rsa.UsePublicKey(pubKey.ControlInterface); if (success = 0) then begin Memo1.Lines.Add(rsa.LastErrorText); Exit; end; // To use Optimal Asymmetric Encryption Padding (OAEP) padding, // simply set the PkcsPadding property to 0 rsa.PkcsPadding := 0; // 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; |
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