at.favre.lib.armadillo

Interface DerivedPasswordCache

All Known Implementing Classes:

DerivedPasswordCache.Default

public interface DerivedPasswordCache

A simple caches, that helps caching derived passwords so that not every get operation requires to derive over the (expensive) key stretching function.

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static class	DerivedPasswordCache.Default Standard implementation of DerivedPasswordCache

Method Summary

Modifier and Type	Method and Description
byte[]	get(byte[] salt, char[] pw) Get the derived bytes from given salt and password.
void	put(byte[] salt, char[] pw, byte[] value) Put a new stretched password with given salt in the cache
void	wipe() Overwrite and remove whole cache

Method Detail

get

byte[] get(byte[] salt,
           char[] pw)

Get the derived bytes from given salt and password.

Parameters:

salt - the used salt for the stretching function - key part 2 of the internal key-value storage

pw - the used password - key part 2 of the internal key-value storage

Returns:

the cached bytes or null of not found

put

void put(byte[] salt,
         char[] pw,
         byte[] value)

Put a new stretched password with given salt in the cache

Parameters:

salt - the used salt for the stretching function - key part 2 of the internal key-value storage

pw - the used password - key part 2 of the internal key-value storage

value - the stretched bytes

wipe

void wipe()

Overwrite and remove whole cache