Pascal (Lazarus/Delphi)

Load Java KeyStore and Access Contents

See more Java KeyStore (JKS) Examples

Loads a Java keystore file and iterates over the contents. A Java keystore (.jks) file can contain one or more trusted root certificate entries and/or one or more private key entries. Each private key entry includes an associated certificate chain. Pascal (Lazarus/Delphi)

program ChilkatDemo;

// Demonstrates using the Chilkat Pascal wrapper via the C bridge DLL.
// Builds as a console application under Lazarus (FPC) or Delphi.

{$IFDEF FPC}
  {$MODE DELPHI}
{$ENDIF}
{$APPTYPE CONSOLE}

uses
  {$IFDEF UNIX}
  cthreads,
  {$ENDIF}
  SysUtils,
  CkDllLoader,
  Chilkat.JavaKeyStore,
  Chilkat.PrivateKey,
  Chilkat.CertChain,
  Chilkat.Cert;

// ---------------------------------------------------------------------------

procedure RunDemo;
var
  success: Boolean;
  jks: TJavaKeyStore;
  numTrustedCerts: Integer;
  numPrivateKeys: Integer;
  cert: TCert;
  alias: string;
  i: Integer;
  privKey: TPrivateKey;
  certChain: TCertChain;

begin
  success := False;

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

  jks := TJavaKeyStore.Create;

  //  Load the Java keystore from a file.  The JKS file password is used
  //  to verify the keyed digest that is found at the very end of the keystore.
  //  It verifies there has been no tampering with the file.
  success := jks.LoadFile('jksFilePassword','/someDir/keyStore.jks');
  if (success = False) then
    begin
      WriteLn(jks.LastErrorText);
      Exit;
    end;

  //  Find out how many of each type of entry:
  numTrustedCerts := jks.NumTrustedCerts;
  numPrivateKeys := jks.NumPrivateKeys;

  cert := TCert.Create;

  //  For each trusted certificate, access it by getting
  //  it as a cert object.  Also get the alias associated with the certificate.
  WriteLn('Trusted Certs:');
  i := 0;
  while i < numTrustedCerts do
    begin
      success := jks.TrustedCertAt(i,cert);
      WriteLn(jks.GetTrustedCertAlias(i) + ': ' + cert.SubjectDN);
      i := i + 1;
    end;

  privKey := TPrivateKey.Create;
  certChain := TCertChain.Create;

  //  For each private key entry, get the private key and
  //  the associated certificate chain.
  //  Each private key is password protected.  Usually it is the same
  //  password as used for the keyed digest of the entire JKS.  
  //  However, this does not have to be.  The password is passed
  //  here to handle the possibility of each private key requiring
  //  a different password.
  WriteLn('Private Keys:');
  i := 0;
  while i < numPrivateKeys do
    begin
      jks.PrivateKeyAt('jksFilePassword',i,privKey);
      WriteLn(jks.GetPrivateKeyAlias(i));
      jks.CertChainAt(i,certChain);

      //  The 1st certificate in the chain is the one associated with the private key.
      certChain.CertAt(0,cert);
      WriteLn(cert.SubjectDN);

      i := i + 1;
    end;



  jks.Free;
  cert.Free;
  privKey.Free;
  certChain.Free;

end;

// ---------------------------------------------------------------------------

begin

  try
    RunDemo;
  except
    on E: Exception do
      WriteLn('Unhandled exception: ', E.ClassName, ': ', E.Message);
  end;

  WriteLn;
  {$IFDEF MSWINDOWS}
  WriteLn('Press Enter to exit...');
  ReadLn;
  {$ENDIF}
end.