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

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Pem, Global;

...

procedure TForm1.Button1Click(Sender: TObject);
var
chilkatGlob: HCkGlobal;
success: Boolean;
pem: HCkPem;
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 := CkGlobal_Create();
success := CkGlobal_UnlockBundle(chilkatGlob,'Anything for 30-day trial.');
if (success <> True) then
  begin
    Memo1.Lines.Add(CkGlobal__lastErrorText(chilkatGlob));
    Exit;
  end;

pem := CkPem_Create();

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

numPublicKeys := CkPem_getNumPublicKeys(pem);
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:');
    CkPem_putPublicKeyFormat(pem,'pkcs1');
    Memo1.Lines.Add(CkPem__toPem(pem));

    // Now PKCS8 PEM format:
    Memo1.Lines.Add('This is PKCS8 format:');
    CkPem_putPublicKeyFormat(pem,'pkcs8');
    Memo1.Lines.Add(CkPem__toPem(pem));

  end;

CkGlobal_Dispose(chilkatGlob);
CkPem_Dispose(pem);

end;