Constructor Detail

• ChaChaEngine

  public ChaChaEngine()

  Creates a 20 rounds ChaCha engine.

• ChaChaEngine

  public ChaChaEngine​(int rounds)

  Creates a ChaCha engine with a specific number of rounds.

  Parameters:

  rounds - the number of rounds (must be an even number).

Method Detail

• getAlgorithmName

  public java.lang.String getAlgorithmName()

  Description copied from interface: StreamCipher
  Return the name of the algorithm the cipher implements.

  Specified by:

  getAlgorithmName in interface StreamCipher

  Overrides:

  getAlgorithmName in class Salsa20Engine

  Returns:

  the name of the algorithm the cipher implements.

• advanceCounter

  protected void advanceCounter​(long diff)

  Overrides:

  advanceCounter in class Salsa20Engine

• advanceCounter

  protected void advanceCounter()

  Overrides:

  advanceCounter in class Salsa20Engine

• retreatCounter

  protected void retreatCounter​(long diff)

  Overrides:

  retreatCounter in class Salsa20Engine

• retreatCounter

  protected void retreatCounter()

  Overrides:

  retreatCounter in class Salsa20Engine

• getCounter

  protected long getCounter()

  Overrides:

  getCounter in class Salsa20Engine

• resetCounter

  protected void resetCounter()

  Overrides:

  resetCounter in class Salsa20Engine

• setKey

  protected void setKey​(byte[] keyBytes,
                        byte[] ivBytes)

  Overrides:

  setKey in class Salsa20Engine

• generateKeyStream

  protected void generateKeyStream​(byte[] output)

  Overrides:

  generateKeyStream in class Salsa20Engine

• chachaCore

  public static void chachaCore​(int rounds,
                                int[] input,
                                int[] x)

  ChaCha function

  Parameters:

  input - input data