Field Detail

• DES_KEY_LENGTH

  public static final int DES_KEY_LENGTH

  See Also:

  Constant Field Values

Constructor Detail

• DESParameters

  public DESParameters​(byte[] key)

Method Detail

• isWeakKey

  public static boolean isWeakKey​(byte[] key,
                                  int offset)

  DES has 16 weak keys. This method will check if the given DES key material is weak or semi-weak. Key material that is too short is regarded as weak.

  See "Applied Cryptography" by Bruce Schneier for more information.

  Returns:

  true if the given DES key material is weak or semi-weak, false otherwise.

• setOddParity

  public static void setOddParity​(byte[] bytes)

  DES Keys use the LSB as the odd parity bit. This can be used to check for corrupt keys.

  Parameters:

  bytes - the byte array to set the parity on.