(Delphi ActiveX) Change Password for Java KeyStore File

Demonstrates how to load a Java keystore, change the password, and save using the new password. If the Java keystore contains only trusted root certificates, then it's simply a matter of loading the JKS with the existing password, and then saving with a new password. If the JKS contains private key entries, then each private key entry must be re-keyed using the new password by calling the ChangePassword method.

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;
oldJksPassword: WideString;
newJksPassword: WideString;
jksPath: WideString;
success: Integer;
numPrivateKeys: Integer;
i: Integer;

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

jks := TChilkatJavaKeyStore.Create(Self);

oldJksPassword := 'existingPassword';
newJksPassword := 'newPassword';
jksPath := '/someDir/keyStore.jks';

// Load the Java keystore from a file.
success := jks.LoadFile(oldJksPassword,jksPath);
if (success <> 1) then
  begin
    Memo1.Lines.Add(jks.LastErrorText);
    Exit;
  end;

// If the JKS contains private key entries, then each
// must be re-keyed with the new password by calling ChangePassword.
numPrivateKeys := jks.NumPrivateKeys;

i := 0;
while i < numPrivateKeys do
  begin

    success := jks.ChangePassword(i,oldJksPassword,newJksPassword);
    if (success <> 1) then
      begin
        Memo1.Lines.Add(jks.LastErrorText);
        Exit;
      end;

    i := i + 1;
  end;

// Write the JKS using the new password for the JKS file's keyed digest.
success := jks.ToFile(newJksPassword,jksPath);
if (success <> 1) then
  begin
    Memo1.Lines.Add(jks.LastErrorText);
    Exit;
  end;

Memo1.Lines.Add('Updated the password for the Java keystore file.');
end;