Package org.bouncycastle.crypto

Interface AlphabetMapper

  • All Known Implementing Classes:
    BasicAlphabetMapper
    public interface AlphabetMapper
    Base interface for mapping from an alphabet to a set of indexes suitable for use with FPE.

    • Method Summary

      All Methods Instance Methods Abstract Methods 
      Modifier and Type Method Description
      char[] convertToChars​(byte[] input)
      Return a char[] for this alphabet based on the indexes passed.
      byte[] convertToIndexes​(char[] input)
      Return the passed in char[] as a byte array of indexes (indexes can be more than 1 byte)
      int getRadix()
      Return the number of characters in the alphabet.

    • Method Detail

      • getRadix

        int getRadix()
        Return the number of characters in the alphabet.
        Returns:
        the radix for the alphabet.

      • convertToIndexes

        byte[] convertToIndexes​(char[] input)
        Return the passed in char[] as a byte array of indexes (indexes can be more than 1 byte)
        Parameters:
        input - characters to be mapped.
        Returns:
        an index array.

      • convertToChars

        char[] convertToChars​(byte[] input)
        Return a char[] for this alphabet based on the indexes passed.
        Parameters:
        input - input array of indexes.
        Returns:
        an array of char corresponding to the index values.