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

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

public int getRadix()

Return the number of characters in the alphabet.

Returns:

the radix for the alphabet.

convertToIndexes

public 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

public 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.