(Delphi ActiveX) Write PKCS1 or PKCS8 Public Key PEM

Demonstrates how to write either PKCS1 or PKCS8 format PEM files. PKCS1 public keys have this PEM format:

-----BEGIN RSA PUBLIC KEY-----
BASE64 ENCODED DATA
-----END RSA PUBLIC KEY-----

-----BEGIN PUBLIC KEY-----
BASE64 ENCODED DATA
-----END PUBLIC KEY-----

Chilkat for Delphi Downloads Chilkat ActiveX DLL for Delphi Chilkat non-ActiveX DLL for Delphi * The examples here use the ActiveX DLL.

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
chilkatGlob: TChilkatGlobal;
success: Integer;
pem: TChilkatPem;
i: Integer;
numPublicKeys: Integer;

begin
// Unlock the Chilkat API.
// Starting in v9.5.0.49, all Chilkat classes can be unlocked at once at the beginning of a program
// by calling UnlockBundle.  It requires a Bundle unlock code.
chilkatGlob := TChilkatGlobal.Create(Self);
success := chilkatGlob.UnlockBundle('Anything for 30-day trial.');
if (success <> 1) then
  begin
    Memo1.Lines.Add(chilkatGlob.LastErrorText);
    Exit;
  end;

pem := TChilkatPem.Create(Self);

// Load a public key from a PEM file.
// (Assume the PEM contains at least one public key..)
success := pem.LoadPemFile('/Users/chilkat/testData/pem/myPublicKey.pem');
if (success <> 1) then
  begin
    Memo1.Lines.Add(pem.LastErrorText);
    Exit;
  end;

numPublicKeys := pem.NumPublicKeys;
if (numPublicKeys = 0) then
  begin
    Memo1.Lines.Add(('Error: Expected the PEM to contain public keys.'));
    Exit;
  end;

// Get each public key as PEM, first in PKCS1 format, then in PKCS8.
for i := 1 to numPublicKeys do
  begin

    // First output to PKCS1 PEM format:
    Memo1.Lines.Add('This is PKCS1 format:');
    pem.PublicKeyFormat := 'pkcs1';
    Memo1.Lines.Add(pem.ToPem());

    // Now PKCS8 PEM format:
    Memo1.Lines.Add('This is PKCS8 format:');
    pem.PublicKeyFormat := 'pkcs8';
    Memo1.Lines.Add(pem.ToPem());

  end;
end;