(Delphi ActiveX) Get the Certificate with Private Key from a Java KeyStore

See more Java KeyStore (JKS) Examples

Load a Chilkat certificate object from a Java KeyStore.

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
jks: TChilkatJavaKeyStore;
password: WideString;
success: Integer;
chain: IChilkatCertChain;
cert: IChilkatCert;
crypt: TChilkatCrypt2;

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

// Most of the time a .jks contains one certificate with it's associated private key.
// (Similar to how a .pfx/.p12 usually contains a particular certificate with private key.)
// This example demonstrates how to get the certificate with private key such that it can be used
// by other Chilkat classes wherever a cert w/ private key is needed.
jks := TChilkatJavaKeyStore.Create(Self);
password := 'secret';
success := jks.LoadFile(password,'qa_data/jks/test_secret.jks');
if (success <> 1) then
  begin
    Memo1.Lines.Add(jks.LastErrorText);
    Exit;
  end;

// Make sure we have a private key.
if (jks.NumPrivateKeys < 1) then
  begin
    Memo1.Lines.Add('No private key available.');
    Exit;
  end;

// -------------------------------------------------------------------------
// Get the certificate chain associated with the 1st (and probably only) private key in the JKS.
chain := jks.GetCertChain(0);
if (jks.LastMethodSuccess <> 1) then
  begin
    Memo1.Lines.Add(jks.LastErrorText);
    Exit;
  end;

cert := chain.GetCert(0);
if (chain.LastMethodSuccess <> 1) then
  begin
    Memo1.Lines.Add(chain.LastErrorText);

    Exit;
  end;

// Verify again that this cert has a private key.
if (cert.HasPrivateKey() <> 1) then
  begin
    Memo1.Lines.Add('Certificate has no associated private key.');

    Exit;
  end;

// We now have the cert object with it's associated private key, and it can be used in other Chilkat classes where needed.
// For example..

crypt := TChilkatCrypt2.Create(Self);
success := crypt.SetSigningCert(cert);
if (success = 0) then
  begin
    Memo1.Lines.Add(crypt.LastErrorText);
    Exit;
  end;

// ...
// ...
end;