de.mkammerer.argon2

Class Argon2Helper

java.lang.Object

de.mkammerer.argon2.Argon2Helper

public final class Argon2Helper
extends java.lang.Object

Provides useful helper methods to work with Argon2.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	Argon2Helper.IterationLogger Logger for the iteration tests.
static class	Argon2Helper.NoopLogger Logs nothing.

Method Summary

Modifier and Type	Method and Description
static int	findIterations(Argon2 argon2, long maxMillisecs, int memory, int parallelism) Finds the number of iterations so that the hash function takes at most the given number of milliseconds.
static int	findIterations(Argon2 argon2, long maxMillisecs, int memory, int parallelism, Argon2Helper.IterationLogger logger) Finds the number of iterations so that the hash function takes at most the given number of milliseconds.

Methods inherited from class java.lang.Object

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

Method Detail

findIterations

public static int findIterations(Argon2 argon2,
                                 long maxMillisecs,
                                 int memory,
                                 int parallelism)

Finds the number of iterations so that the hash function takes at most the given number of milliseconds.

Parameters:

argon2 - Argon2 instance.

maxMillisecs - Maximum number of milliseconds the hash function must take.

memory - Memory. See Argon2.hash(int, int, int, char[]).

parallelism - Parallelism. See Argon2.hash(int, int, int, char[]).

Returns:

The number of iterations so that the hash function takes at most the given number of milliseconds.

findIterations

public static int findIterations(Argon2 argon2,
                                 long maxMillisecs,
                                 int memory,
                                 int parallelism,
                                 Argon2Helper.IterationLogger logger)

Finds the number of iterations so that the hash function takes at most the given number of milliseconds.

Parameters:

argon2 - Argon2 instance.

maxMillisecs - Maximum number of milliseconds the hash function must take.

memory - Memory. See Argon2.hash(int, int, int, char[]).

parallelism - Parallelism. See Argon2.hash(int, int, int, char[]).

logger - Logger which gets called with the runtime of the tested iteration steps.

Returns:

The number of iterations so that the hash function takes at most the given number of milliseconds.