Package org.bouncycastle.crypto.util

Class RadixConverter

  • public class RadixConverter
extends java.lang.Object
    Utility class to convert decimal numbers (BigInteger) into a number in the base provided and the other way round.

    For an application of this see the FPE parameter classes.

    • Constructor Summary

      Constructors 
      Constructor Description
      RadixConverter​(int radix)  
      RadixConverter​(int radix, int numberOfCachedPowers)  

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      java.math.BigInteger fromEncoding​(short[] digits)  
      int getDigitsGroupLength()  
      int getRadix()  
      void toEncoding​(java.math.BigInteger number, int messageLength, short[] out)  

      • Methods inherited from class java.lang.Object

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

    • Constructor Detail

      • RadixConverter

        public RadixConverter​(int radix,
                      int numberOfCachedPowers)
        Parameters:
        radix - the radix to use for base conversions
        numberOfCachedPowers - number of intermediate base powers to precompute and cache.

      • RadixConverter

        public RadixConverter​(int radix)
        Parameters:
        radix - the radix to use for base conversions.

    • Method Detail

      • getRadix

        public int getRadix()

      • toEncoding

        public void toEncoding​(java.math.BigInteger number,
                       int messageLength,
                       short[] out)

      • fromEncoding

        public java.math.BigInteger fromEncoding​(short[] digits)

      • getDigitsGroupLength

        public int getDigitsGroupLength()