コード例 #1
0
    public boolean matches(byte[] candidate) {

      if (value.length != candidate.length) {
        return false;
      }

      return !BitMap.hasAnyBitSet(BitMap.xor(value, BitMap.and(candidate, mask)));
    }
コード例 #2
0
    public void validateMask() throws AclFormatException {

      if (BitMap.hasAnyBitSet(BitMap.and(value, BitMap.not(mask)))) {
        throw new AclFormatException(
            "The base address '"
                + ServerAcl.dottedNotation(value)
                + "' is too specific for block-size-spec /"
                + bitBlockSize);
      }
    }
コード例 #3
0
    public AclEntry(byte[] value, int bitBlockSize, boolean allow) throws AclFormatException {

      byte[] allOn = null;

      switch (value.length) {
        case 4:
          allOn = ALL_SET_4BYTES;
          break;

        case 16:
          allOn = ALL_SET_16BYTES;
          break;

        default:
          throw new IllegalArgumentException("Only 4 and 16 bytes supported, not " + value.length);
      }

      if (bitBlockSize > value.length * 8) {
        throw new IllegalArgumentException(
            "Specified "
                + bitBlockSize
                + " significant bits, but value only has "
                + (value.length * 8)
                + " bits");
      }

      this.bitBlockSize = bitBlockSize;
      this.value = value;
      mask = BitMap.leftShift(allOn, value.length * 8 - bitBlockSize);

      if (mask.length != value.length) {
        throw new RuntimeException(
            "Basic program assertion failed.  "
                + "Generated mask length "
                + mask.length
                + " (bytes) does not match given value length "
                + value.length
                + " (bytes).");
      }

      this.allow = allow;

      validateMask();
    }