71     static Provider getSunJceProvider() {
  72         Provider p = sunJce;
  73         if (p == null) {
  74             synchronized (LOCK) {
  75                 p = getProvider
  76                     (sunJce, "SunJCE", "com.sun.crypto.provider.SunJCE");
  77                 sunJce = p;
  78             }
  79         }
  80         return p;
  81     }
  82 
  83     private static Provider getProvider(Provider p, String providerName,
  84             String className) {
  85         if (p != null) {
  86             return p;
  87         }
  88         p = Security.getProvider(providerName);
  89         if (p == null) {
  90             try {
  91                 Class<?> clazz = Class.forName(className);
  92                 p = (Provider)clazz.newInstance();

  93             } catch (Exception e) {
  94                 throw new ProviderException
  95                         ("Could not find provider " + providerName, e);
  96             }
  97         }
  98         return p;
  99     }
 100 
 101     static byte[] convert(byte[] input, int offset, int len) {
 102         if ((offset == 0) && (len == input.length)) {
 103             return input;
 104         } else {
 105             byte[] t = new byte[len];
 106             System.arraycopy(input, offset, t, 0, len);
 107             return t;
 108         }
 109     }
 110 
 111     static byte[] subarray(byte[] b, int ofs, int len) {
 112         byte[] out = new byte[len];

  71     static Provider getSunJceProvider() {
  72         Provider p = sunJce;
  73         if (p == null) {
  74             synchronized (LOCK) {
  75                 p = getProvider
  76                     (sunJce, "SunJCE", "com.sun.crypto.provider.SunJCE");
  77                 sunJce = p;
  78             }
  79         }
  80         return p;
  81     }
  82 
  83     private static Provider getProvider(Provider p, String providerName,
  84             String className) {
  85         if (p != null) {
  86             return p;
  87         }
  88         p = Security.getProvider(providerName);
  89         if (p == null) {
  90             try {
  91                 @SuppressWarnings("deprecation")
  92                 Object o = Class.forName(className).newInstance();
  93                 p = (Provider)o;
  94             } catch (Exception e) {
  95                 throw new ProviderException
  96                         ("Could not find provider " + providerName, e);
  97             }
  98         }
  99         return p;
 100     }
 101 
 102     static byte[] convert(byte[] input, int offset, int len) {
 103         if ((offset == 0) && (len == input.length)) {
 104             return input;
 105         } else {
 106             byte[] t = new byte[len];
 107             System.arraycopy(input, offset, t, 0, len);
 108             return t;
 109         }
 110     }
 111 
 112     static byte[] subarray(byte[] b, int ofs, int len) {
 113         byte[] out = new byte[len];