Pascal (Lazarus/Delphi)

Add Private Key to Java Keystore

See more Java KeyStore (JKS) Examples

Adds a private key to an existing Java keystore. 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.XmlCertVault,
  Chilkat.JavaKeyStore,
  Chilkat.PrivateKey,
  Chilkat.Cert,
  Chilkat.Pfx;

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

procedure RunDemo;
var
  success: Boolean;
  jks: TJavaKeyStore;
  jksPassword: string;
  jksPath: string;
  cert: TCert;
  certVault: TXmlCertVault;
  privKey: TPrivateKey;
  alias: string;
  pfx: TPfx;

begin
  success := False;

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

  jks := TJavaKeyStore.Create;

  jksPassword := 'myJksPassword';
  jksPath := '/someDir/keyStore.jks';

  //  Load the Java keystore from a file.
  success := jks.LoadFile(jksPassword,jksPath);
  if (success <> True) then
    begin
      WriteLn(jks.LastErrorText);
      Exit;
    end;

  //  A JKS private key entry consists of both the private key,
  //  it's associated certificate (which contains the matching public key
  //  within the X.509 of the certificate), and the certificates in the
  //  chain of authentication to the root.
  //  
  //  Therefore, to add a private key entry to a JKS requires
  //  a Chilkat certificate object that has a private key and which also
  //  has the certificate chain (up to the root) available.

  //  There are many ways to get a Chilkat certificate object
  //  that contains (within it) the private key and the certificate chain
  //  This example will show two possibilities:
  //  (1) Where the cert and issuing root are provided in PEM format in .crt files,
  //  and the private key is also provided in unencrypted PEM format (.key file).
  //  (2) Where the cert, private key, and issuing root are provided in a single PFX.

  //  First for the .crt / .key files:
  cert := TCert.Create;

  //  Chilkat will automatically determine the format of the cert file and load it correctly.
  success := cert.LoadFromFile('/mycerts/alice.crt');
  if (success <> True) then
    begin
      WriteLn(cert.LastErrorText);
      Exit;
    end;

  //  Certificates required for building the chain of authentication can be
  //  added to an XML certificate vault object, and then provided as
  //  a source for obtaining certs when building the chain.
  certVault := TXmlCertVault.Create;
  success := certVault.AddCertFile('/mycerts/ca.crt');
  if (success <> True) then
    begin
      WriteLn(certVault.LastErrorText);
      Exit;
    end;
  success := cert.UseCertVault(certVault);
  if (success <> True) then
    begin
      WriteLn(cert.LastErrorText);
      Exit;
    end;

  //  Now provide the associated private key to the certificate object.
  //  The Chilkat private key class provides methods for loading from many formats (both
  //  encrypted and unencrypted).
  privKey := TPrivateKey.Create;
  success := privKey.LoadPemFile('/mycerts/alice.key');
  if (success <> True) then
    begin
      WriteLn(privKey.LastErrorText);
      Exit;
    end;

  //  Provide the certificate object with the private key:
  success := cert.SetPrivateKey(privKey);
  if (success <> True) then
    begin
      WriteLn(cert.LastErrorText);
      Exit;
    end;

  //  Our certificate object now contains all that we need to add it as a private key entry
  //  to the Java keystore:
  alias := 'alice';
  success := jks.AddPrivateKey(cert,alias,jksPassword);
  if (success <> True) then
    begin
      WriteLn(jks.LastErrorText);
      Exit;
    end;

  //  Write the updated JKS, which contains the new private key entry w/ certificate chain.
  success := jks.ToFile(jksPassword,jksPath);
  if (success <> True) then
    begin
      WriteLn(jks.LastErrorText);
      Exit;
    end;

  WriteLn('Added new private key entry (from .crt and .key files) to the JKS!');

  //  Now let's add a new private key entry from a PFX that contains a single
  //  private key with associated cert and cert chain.
  pfx := TPfx.Create;

  success := pfx.LoadPfxFile('/myPfxFiles/my.pfx','pfxPassword');
  if (success <> True) then
    begin
      WriteLn(pfx.LastErrorText);
      Exit;
    end;

  //  This is easy -- simply add the PFX to the JKS
  alias := 'bob';
  success := jks.AddPfx(pfx,alias,jksPassword);
  if (success <> True) then
    begin
      WriteLn(jks.LastErrorText);
      Exit;
    end;

  //  Write the updated JKS, which contains the new private key entry w/ certificate chain
  //  that came from the PFX.
  success := jks.ToFile(jksPassword,jksPath);
  if (success <> True) then
    begin
      WriteLn(jks.LastErrorText);
      Exit;
    end;

  WriteLn('Added new private key entry (from PFX) to the JKS!');


  jks.Free;
  cert.Free;
  certVault.Free;
  privKey.Free;
  pfx.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.