Method Details

• equal

  public static int equal(int b, int c)

  Constant-time byte comparison.

  Parameters:

  b - the first value; only its low 8 bits, which carry the byte, are compared

  c - the second value; only its low 8 bits, which carry the byte, are compared

  Returns:

  1 if b and c are equal, 0 otherwise.

• equal

  public static int equal(byte[] b, byte[] c)

  Constant-time byte[] comparison.

  Parameters:

  b - a byte[]

  c - a byte[]

  Returns:

  1 if b and c are equal, 0 otherwise.

• negative

  public static int negative(int b)

  Constant-time determine if byte is negative.

  Parameters:

  b - the byte to check.

  Returns:

  1 if the byte is negative, 0 otherwise.

• bit

  public static int bit(byte[] h, int i)

  The i'th bit of a byte array.

  Parameters:

  h - The byte array.

  i - The bit index.

  Returns:

  0 or 1, the value of the i'th bit in h.

• hexToBytes

  public static byte[] hexToBytes(String s)

  Converts a hex string to bytes.

  Parameters:

  s - the hex string to be converted.

  Returns:

  the byte[]

• bytesToHex

  public static String bytesToHex(byte[] raw)

  Converts bytes to a hex string.

  Parameters:

  raw - the byte[] to be converted.

  Returns:

  the hex representation as a string.