(Delphi DLL) Load PEM Public/Private Key into RSA Object

Demonstrates how to load a PEM key into the Chilkat RSA object.

Note: This example requires Chilkat v11.0.0 or greater.

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
success: Boolean;
rsa: HCkRsa;
publicKeyPem: PWideChar;
pubkey: HCkPublicKey;
privateKeyPem: PWideChar;
privkey: HCkPrivateKey;

begin
success := False;

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

rsa := CkRsa_Create();

// First demonstrate importing a PEM public key:
publicKeyPem := 'PEM public-key data goes here';
pubkey := CkPublicKey_Create();

success := CkPublicKey_LoadFromString(pubkey,publicKeyPem);
if (success = False) then
  begin
    Memo1.Lines.Add(CkPublicKey__lastErrorText(pubkey));
    Exit;
  end;

success := CkRsa_UsePublicKey(rsa,pubkey);
if (success = False) then
  begin
    Memo1.Lines.Add(CkRsa__lastErrorText(rsa));
    Exit;
  end;

// Demonstrate importing a PEM private key:
privateKeyPem := 'PEM private-key data goes here';
privkey := CkPrivateKey_Create();

// If the private key PEM is protected with a password, then 
// call LoadEncryptedPem.  Otherwise call LoadPem.
success := CkPrivateKey_LoadPem(privkey,privateKeyPem);
if (success = False) then
  begin
    Memo1.Lines.Add(CkPrivateKey__lastErrorText(privkey));
    Exit;
  end;

success := CkRsa_UsePrivateKey(rsa,privkey);
if (success = False) then
  begin
    Memo1.Lines.Add(CkRsa__lastErrorText(rsa));
    Exit;
  end;

Memo1.Lines.Add('OK!');

CkRsa_Dispose(rsa);
CkPublicKey_Dispose(pubkey);
CkPrivateKey_Dispose(privkey);

end;