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

    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 Details

    • 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.