Delphi ActiveX

DSA Public Key PEM to DER Conversion

See more DSA Examples

Converts a DSA public key from PEM format to DER. Delphi ActiveX

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;
dsa: TChilkatDsa;
pemPublicKey: WideString;

begin
success := 0;

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

dsa := TChilkatDsa.Create(Self);

// 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
    Memo1.Lines.Add(dsa.LastErrorText);
    Exit;
  end;

// Write it out as a DER file:
success := dsa.ToPublicDerFile('dsa_pub.der');
if (success <> 1) then
  begin
    Memo1.Lines.Add(dsa.LastErrorText);
    Exit;
  end;

Memo1.Lines.Add('Finished!');
end;