Package org.bouncycastle.pqc.crypto.gmss.util

Class GMSSUtil

  • public class GMSSUtil
extends java.lang.Object
    This class provides several methods that are required by the GMSS classes.

    • Constructor Summary

      Constructors 
      Constructor Description
      GMSSUtil()  

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      int bytesToIntLittleEndian​(byte[] bytes)
      Converts a byte array beginning at offset into a 32 bit integer (little-endian representation)
      int bytesToIntLittleEndian​(byte[] bytes, int offset)
      Converts a byte array beginning at offset into a 32 bit integer (little-endian representation)
      byte[] concatenateArray​(byte[][] arraycp)
      This method concatenates a 2-dimensional byte array into a 1-dimensional byte array
      int getLog​(int intValue)
      This method returns the least integer that is greater or equal to the logarithm to the base 2 of an integer intValue.
      byte[] intToBytesLittleEndian​(int value)
      Converts a 32 bit integer into a byte array beginning at offset (little-endian representation)
      void printArray​(java.lang.String text, byte[] array)
      This method prints the values of a 1-dimensional byte array
      void printArray​(java.lang.String text, byte[][] array)
      This method prints the values of a 2-dimensional byte array
      boolean testPowerOfTwo​(int testValue)
      This method tests if an integer is a power of 2.

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

    • Constructor Detail

      • GMSSUtil

        public GMSSUtil()

    • Method Detail

      • intToBytesLittleEndian

        public byte[] intToBytesLittleEndian​(int value)
        Converts a 32 bit integer into a byte array beginning at offset (little-endian representation)
        Parameters:
        value - the integer to convert

      • bytesToIntLittleEndian

        public int bytesToIntLittleEndian​(byte[] bytes)
        Converts a byte array beginning at offset into a 32 bit integer (little-endian representation)
        Parameters:
        bytes - the byte array
        Returns:
        The resulting integer

      • bytesToIntLittleEndian

        public int bytesToIntLittleEndian​(byte[] bytes,
                                  int offset)
        Converts a byte array beginning at offset into a 32 bit integer (little-endian representation)
        Parameters:
        bytes - the byte array
        offset - the integer offset into the byte array
        Returns:
        The resulting integer

      • concatenateArray

        public byte[] concatenateArray​(byte[][] arraycp)
        This method concatenates a 2-dimensional byte array into a 1-dimensional byte array
        Parameters:
        arraycp - a 2-dimensional byte array.
        Returns:
        1-dimensional byte array with concatenated input array

      • printArray

        public void printArray​(java.lang.String text,
                       byte[][] array)
        This method prints the values of a 2-dimensional byte array
        Parameters:
        text - a String
        array - a 2-dimensional byte array

      • printArray

        public void printArray​(java.lang.String text,
                       byte[] array)
        This method prints the values of a 1-dimensional byte array
        Parameters:
        text - a String
        array - a 1-dimensional byte array.

      • testPowerOfTwo

        public boolean testPowerOfTwo​(int testValue)
        This method tests if an integer is a power of 2.
        Parameters:
        testValue - an integer
        Returns:
        TRUE if testValue is a power of 2, FALSE otherwise

      • getLog

        public int getLog​(int intValue)
        This method returns the least integer that is greater or equal to the logarithm to the base 2 of an integer intValue.
        Parameters:
        intValue - an integer
        Returns:
        The least integer greater or equal to the logarithm to the base 2 of intValue