DSA Public Key PEM to DER Conversion

Converts a DSA public key from PEM format to DER.

Download Chilkat DSA ActiveX

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

...

procedure TForm1.Button1Click(Sender: TObject);
var
success: Integer;
dsa: TChilkatDsa;
pemPublicKey: String;

begin


dsa := TChilkatDsa.Create(Self);

success := dsa.UnlockComponent('Anything for 30-day trial');
if (success <> 1) then
  begin
    ShowMessage(dsa.LastErrorText);
    Exit;
  end;

//  Load a PEM public key.

pemPublicKey := dsa.LoadText('dsa_pub.pem');
//  Import the public key PEM into the DSA object.
success := dsa.FromPublicPem(pemPublicKey);
if (success <> 1) then
  begin
    ShowMessage(dsa.LastErrorText);
    Exit;
  end;

//  Write it out as a DER file:
success := dsa.ToPublicDerFile('dsa_pub.der');
if (success <> 1) then
  begin
    ShowMessage(dsa.LastErrorText);
    Exit;
  end;

ShowMessage('Finished!');
end;