(Delphi DLL) Generate RSA Public/Private Key Pair and Export to PEM

Delphi DLL example code showing how to generate an RSA public/private key pair and export to PEM files.

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, PrivateKey, Rsa, PublicKey;

...

procedure TForm1.Button1Click(Sender: TObject);
var
rsa: HCkRsa;
success: Boolean;
publicKeyXml: PWideChar;
privateKeyXml: PWideChar;
privKey: HCkPrivateKey;
pubKey: HCkPublicKey;

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

rsa := CkRsa_Create();

// Generate a 1024-bit key.  Chilkat RSA supports
// key sizes ranging from 512 bits to 4096 bits.
success := CkRsa_GenerateKey(rsa,1024);
if (success <> True) then
  begin
    Memo1.Lines.Add(CkRsa__lastErrorText(rsa));
    Exit;
  end;

// Keys are exported in XML format:
publicKeyXml := CkRsa__exportPublicKey(rsa);
Memo1.Lines.Add(publicKeyXml);

privateKeyXml := CkRsa__exportPrivateKey(rsa);
Memo1.Lines.Add(privateKeyXml);

// Save the private key in PEM format:
privKey := CkPrivateKey_Create();
success := CkPrivateKey_LoadXml(privKey,privateKeyXml);
success := CkPrivateKey_SavePemFile(privKey,'privateKey.pem');

// Save the public key in PEM format:
pubKey := CkPublicKey_Create();
success := CkPublicKey_LoadFromString(pubKey,publicKeyXml);
success := CkPublicKey_SavePemFile(pubKey,False,'publicKey.pem');

CkRsa_Dispose(rsa);
CkPrivateKey_Dispose(privKey);
CkPublicKey_Dispose(pubKey);

end;