if (sk != null) {
                    // session key is truncated to 16 bytes, right padded with 0 if shorter
                    byte[] key = new byte[16];
                    System.arraycopy(sk, 0, key, 0, Math.min(16, sk.length));
                    this.sessionKey = key;
                }

                boolean signed = response != null && response.isSigned();

        Set<String> uniqueCounters = new HashSet<>();
        for (int i = 0; i < sampleSize; i++) {
            // Extract first 8 bytes as counter
            byte[] counter = new byte[8];
            System.arraycopy(nonces[i], 0, counter, 0, 8);
            uniqueCounters.add(bytesToHex(counter));
        }

        // All nonces should be unique (high entropy from SecureRandom)

    long length = 0;
    for (long[] array : arrays) {
      length += array.length;
    }
    long[] result = new long[checkNoOverflow(length)];
    int pos = 0;
    for (long[] array : arrays) {
      System.arraycopy(array, 0, result, pos, array.length);
      pos += array.length;
    }
    return result;
  }

  private static int checkNoOverflow(long result) {
    checkArgument(
        result == (int) result,

   *
   * A call to of() with a parameter that is not a plain Object[] (here,
   * Interface[]) creates a RegularImmutableSortedSet backed by an array of that
   * type. Later, RegularImmutableSortedSet.toArray() calls System.arraycopy()
   * to copy from that array to the destination array. This would be fine, but
   * GWT has a bug: It refuses to copy from an E[] to an Object[] when E is an
   * interface type.
   */

  private static byte[] extract(byte[] result, int length) {
    if (length == result.length) {
      return result;
    }
    byte[] trunc = new byte[length];
    System.arraycopy(result, 0, trunc, 0, length);
    return trunc;
  }

  /**
   * Determines whether the specified character sequence is a valid encoded string according to this
   * encoding.
   *
   * @since 20.0

                + " bytes: %s",
            numBytes, address);
      }
    }

    // Copy the bytes into the least significant positions.
    System.arraycopy(addressBytes, srcPos, targetCopyArray, destPos, copyLength);

    try {
      return InetAddress.getByAddress(targetCopyArray);
    } catch (UnknownHostException impossible) {