Delphi ActiveX Requires Chilkat v11.0.0+

RSA Import Public Key from Certificate PEM

See more RSA Examples

Uses a certificate's public key for RSA encryption. The public key from the certificate .pem file is used. Delphi ActiveX

var
success: Integer;
cert: TChilkatCert;
pubKey: TPublicKey;
rsa: TChilkatRsa;
encryptedStr: WideString;

begin
success := 0;

cert := TChilkatCert.Create(Self);

success := cert.LoadFromFile('qa_data/pem/mf_public_rsa.pem');
if (success = 0) then
  begin
    Memo1.Lines.Add(cert.LastErrorText);
    Exit;
  end;

pubKey := TPublicKey.Create(Self);
cert.GetPublicKey(pubKey.ControlInterface);

rsa := TChilkatRsa.Create(Self);
rsa.UsePublicKey(pubKey.ControlInterface);

rsa.EncodingMode := 'base64';
encryptedStr := rsa.EncryptStringENC('hello',0);
Memo1.Lines.Add('encrypted string = ' + encryptedStr);