tjutility.java

智能卡多应用一直是业界的重要课题

/**
 *        Title:  Utility Routines
 *
 *      Project:  Universal Application Specification v1.0 for PBOCv2
 *
 *    Copyright:  Copyright (c) CUP 2005
 *      Company:  China Unionpay Co., Ltd
 *
 *  Platform   :  Java virtual machine
 *  Language   :  1.3.0-C
 *  Devl tool  :  Borland (c) JBuilder 4.0 *
 *  author     :  Meng Hongwen<[e-mail]>
 *  version 1.0
 */

package cupUAPP;

import javacard.framework.*;

public final  class tjutility {

   //------------------------------------------------
   public final static short unpackPKCS1(byte[] pdata, short dl, byte[] r)
   {
       short  i;

       if ( pdata[0] != (short)0 ) return (short)0;
       if ( pdata[1] > (short)2 )  return (short)0;

       for(i=(short)2; i<dl; i++ )
          if (pdata[i] == (short)0 ) break;

       i++;
       if ( i>= dl) return (short)0;
       dl = (short)(dl-i);
       Util.arrayCopy(pdata,i,r,(short)0, dl);
       return dl;
   }
   //------------------------------------------------
}