Constructor Detail

• Elligator2

  public Elligator2(I2PAppContext ctx)

  Create an Elligator2 instance.

  Parameters:

  ctx - the I2P app context

Method Detail

• decode

  public static PublicKey decode(AtomicBoolean alternative,
                                 byte[] representative)

  From javascript version documentation: Returns an array with the point and the second argument of the corresponding call to the `encode` function. It's also able to return null if the representative is invalid (there are only 10 invalid representatives).

  Parameters:

  alternative - out parameter, or null if you don't care

  representative - the encoded data, little endian, 32 bytes; WILL BE MODIFIED by masking byte 31

  Returns:

  x or null on failure

• decode

  public static PublicKey decode(byte[] representative)

  From javascript version documentation: Returns an array with the point and the second argument of the corresponding call to the `encode` function. It's also able to return null if the representative is invalid (there are only 10 invalid representatives).

  Parameters:

  representative - the encoded data, little endian, 32 bytes WILL BE MODIFIED by masking byte 31

  Returns:

  x or null on failure

• encode

  public byte[] encode(PublicKey point)

  Use for on-the-wire. Don't use for unit tests as output will be randomized based on the 'alternative' and the high bits. There are eight possible encodings for any point. Output will look like 256 random bits.

  Parameters:

  point - the public key to encode

  Returns:

  "representative", little endian or null on failure