/*
 * Copyright (c) 2018 Oracle and/or its affiliates. All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v. 2.0, which is available at
 * http://www.eclipse.org/legal/epl-2.0.
 *
 * This Source Code may also be made available under the following Secondary
 * Licenses when the conditions for such availability set forth in the
 * Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
 * version 2 with the GNU Classpath Exception, which is available at
 * https://www.gnu.org/software/classpath/license.html.
 *
 * SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
 */

package com.sun.connector.cciblackbox;

import java.security.AccessController;
import java.security.PrivilegedAction;
import java.util.Iterator;
import java.util.Set;

import jakarta.resource.ResourceException;
import jakarta.resource.spi.ConnectionRequestInfo;
import jakarta.resource.spi.ManagedConnectionFactory;
import jakarta.resource.spi.SecurityException;
import jakarta.resource.spi.security.PasswordCredential;
import javax.security.auth.Subject;

/**
 * This is a utility class.
 */

public class Util {
  static public PasswordCredential getPasswordCredential(ManagedConnectionFactory mcf,
      final Subject subject, ConnectionRequestInfo info) throws ResourceException {

    if (subject == null) {
      if (info == null) {
        return null;
      } else {
        CciConnectionRequestInfo myinfo = (CciConnectionRequestInfo) info;
        PasswordCredential pc = new PasswordCredential(myinfo.getUser(), myinfo.getPassword()
            .toCharArray());
        pc.setManagedConnectionFactory(mcf);
        return pc;
      }
    } else {
      Set creds = (Set) AccessController.doPrivileged(new PrivilegedAction() {
        public Object run() {
          return subject.getPrivateCredentials(PasswordCredential.class);
        }
      });
      PasswordCredential pc = null;
      Iterator iter = creds.iterator();
      while (iter.hasNext()) {
        PasswordCredential temp = (PasswordCredential) iter.next();
        if (temp.getManagedConnectionFactory().equals(mcf)) {
          pc = temp;
          break;
        }
      }
      if (pc == null) {
        throw new SecurityException("No PasswordCredential found");
      } else {
        return pc;
      }
    }
  }

  static public boolean isEqual(String a, String b) {
    if (a == null) {
      return (b == null);
    } else {
      return a.equals(b);
    }
  }

  static public boolean isPasswordCredentialEqual(PasswordCredential a, PasswordCredential b) {
    if (a == b) return true;
    if ((a == null) && (b != null)) return false;
    if ((a != null) && (b == null)) return false;
    if (!isEqual(a.getUserName(), b.getUserName())) return false;
    String p1 = null;
    String p2 = null;
    if (a.getPassword() != null) {
      p1 = new String(a.getPassword());
    }
    if (b.getPassword() != null) {
      p2 = new String(b.getPassword());
    }
    return (isEqual(p1, p2));
  }

}