AuditPolicyManager.java

/*
** Module   : AuditPolicyManager.java
** Abstract : Provides AUDIT-POLICY attributes and methods support
**
** Copyright (c) 2019-2022, Golden Code Development Corporation.
**
**
** -#- -I- --Date-- ---------------------------------------Description----------------------------------------
** 001 IAS 20190506 Created initial version.
** 002 IAS 20190522 Added ENCRYPT-AUDIT-MAC-KEY implementation.
** 003 CA  20220426 Added AUDIT-ENABLED builtin function stubs.
**     CA  20220610 Don't return null, instead return unknown values, otherwise the the client will abend if
**                  it calls these unimplemented APIs.
** 004 AS  20250130 Added missing implementation token support.
*/

/*
** This program is free software: you can redistribute it and/or modify
** it under the terms of the GNU Affero General Public License as
** published by the Free Software Foundation, either version 3 of the
** License, or (at your option) any later version.
**
** This program is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
** GNU Affero General Public License for more details.
**
** You may find a copy of the GNU Affero GPL version 3 at the following
** location: https://www.gnu.org/licenses/agpl-3.0.en.html
** 
** Additional terms under GNU Affero GPL version 3 section 7:
** 
**   Under Section 7 of the GNU Affero GPL version 3, the following additional
**   terms apply to the works covered under the License.  These additional terms
**   are non-permissive additional terms allowed under Section 7 of the GNU
**   Affero GPL version 3 and may not be removed by you.
** 
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** 
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*/

package com.goldencode.p2j.util;

import java.nio.charset.*;

import org.apache.commons.codec.binary.*;

import com.goldencode.proxy.*;

/**
 * Provides static methods implementing support for the
 * AUDIT-POLICY system handle attributes and methods  
 * See {@link CommonAuditPolicy}
 * 
 */
public class AuditPolicyManager
{
   /** A token used for non repetitive logging of missing isAuditEnabled implementation.
    *  It is to be removed from the class attributes after the feature is implemented. */
   private static volatile Object isAuditEnabledToken = null;

   /**
    * Get a the instance for the AUDIT-POLICY system handle.  Is obtained using a call to the
    * {@link StaticProxy#obtain(Class, Class[])}, using the {@link CommonAuditPolicy} interface
    * and its methods implemented by these classes: {@link AuditPolicyManager}.
    * 
    * @return   See above.
    */
   public static handle asHandle()
   {
      // TODO: implement
      return new handle();
   }

   /**
    * Implementation of AUDIT-POLICY:ENCRYPT-AUDIT-MAC-KEY method. 
    * Encrypts and encodes the specified character expression and returns an encrypted character 
    * value that you can store for later use in message authentication code (MAC) operations
    *  
    * @param   key
    *          A character expression containing the key to encrypt.
    * 
    * @return  An encrypted character value that you can store for later use in message 
    *          authentication code (MAC) operations.
    */
   @LegacyMethod(name = "ENCRYPT-AUDIT-MAC-KEY")
   public static character encryptAuditMacKey(character key)
   {
      if (key.isUnknown())
      {
         return new character();
      }
      byte[] bkey = key.toStringMessage().getBytes(StandardCharsets.UTF_8);
      byte[] progress = "PROGRESS".getBytes(StandardCharsets.UTF_8);
      for (int i = 0; i < bkey.length; i++)
      {
         bkey[i] ^= progress[i % progress.length]; 
      }
      return new character(String.copyValueOf(Hex.encodeHex(bkey)));
   }
   
   /**
    * Implementation of AUDIT-POLICY:REFRESH-AUDIT-POLICY method. 
    * Notifies the specified audit-enabled database that its audit policy tables have changed, 
    * which causes the database to refresh its current run-time audit policy settings cache 
    * before performing any more database operations.
    *  
    * @param   seqNo
    *          The sequence number of the connected database that needs to refresh its audit 
    *          policy settings cache.
    * 
    * @return   <code>true</code> if operation succeeded or
    *           <code>false</code> otherwise
    */
   @LegacyMethod(name = "REFRESH-AUDIT-POLICY")
   public static logical refreshAuditPolicy(integer seqNo)
   {
      UnimplementedFeature.missing("REFRESH-AUDIT-POLICY method is not implemented.");
      return new logical();
   }

   /**
    * Implementation of AUDIT-POLICY:REFRESH-AUDIT-POLICY method. 
    * Notifies the specified audit-enabled database that its audit policy tables have changed, 
    * which causes the database to refresh its current run-time audit policy settings cache 
    * before performing any more database operations.
    *  
    * @param   alias
    *          The logical name or alias of the connected database that needs to refresh its 
    *          audit policy settings cache..
    * 
    * @return   <code>true</code> if operation succeeded or
    *           <code>false</code> otherwise
    */
   @LegacyMethod(name = "REFRESH-AUDIT-POLICY")
   public static logical refreshAuditPolicy(character alias)
   {
      UnimplementedFeature.missing("REFRESH-AUDIT-POLICY method is not implemented.");
      return new logical();
   }
   
   /**
    * Implementation of the AUDIT-ENABLED function.
    * 
    * @param   seqNo
    *          The sequence number of the connected database.
    *          
    * @return   n/a
    */
   public static logical isAuditEnabled(integer seqNo)
   {
      isAuditEnabledToken =
              UnimplementedFeature.missing("AUDIT-ENABLED function is not implemented.",
                                           isAuditEnabledToken);
      return new logical();
   }
   
   /**
    * Implementation of the AUDIT-ENABLED function.
    * 
    * @param   alias
    *          The logical name or alias of the connected database.
    *          
    * @return   n/a
    */
   public static logical isAuditEnabled(character alias)
   {
      return isAuditEnabled(new integer());
   }

   /**
    * Implementation of the AUDIT-ENABLED function.
    * 
    * @return   n/a
    */
   public static logical isAuditEnabled()
   {
      return isAuditEnabled(new integer());
   }
}