de.slevermann.pwhash.pbkdf2

Class Pbkdf2WithHmacSha512Strategy

java.lang.Object

de.slevermann.pwhash.pbkdf2.Pbkdf2Strategy

de.slevermann.pwhash.pbkdf2.Pbkdf2WithHmacSha512Strategy

All Implemented Interfaces:

HashStrategy

public class Pbkdf2WithHmacSha512Strategy
extends Pbkdf2Strategy

A strategy implementation using PBKDF2WithHmacSHA512 for password hashing.

Author:

Simon Levermann

Field Summary

Fields

Modifier and Type	Field and Description
static int	DEFAULT_HASH_LENGTH

Fields inherited from class de.slevermann.pwhash.pbkdf2.Pbkdf2Strategy

DEFAULT_ITERATIONS, DEFAULT_SALT_LENGTH

Constructor Summary

Constructors

Constructor and Description
Pbkdf2WithHmacSha512Strategy() Construct a default PBKDF2WithHmacSHA512 instance

Method Summary

Modifier and Type	Method and Description
static Pbkdf2WithHmacSha512Strategy	getInstance(int saltLength, int dkLength, int iterations) Acquire a custom PBKDF2WithHmacSHA512 instance

Methods inherited from class de.slevermann.pwhash.pbkdf2.Pbkdf2Strategy

hash, needsRehash, verify

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_HASH_LENGTH

public static final int DEFAULT_HASH_LENGTH

See Also:

Constant Field Values

Constructor Detail

Pbkdf2WithHmacSha512Strategy

public Pbkdf2WithHmacSha512Strategy()

Construct a default PBKDF2WithHmacSHA512 instance

Method Detail

getInstance

public static Pbkdf2WithHmacSha512Strategy getInstance(int saltLength,
                                                       int dkLength,
                                                       int iterations)
                                                throws InvalidHashException

Acquire a custom PBKDF2WithHmacSHA512 instance

Parameters:

saltLength - length of the salt to be generated (in bytes)

dkLength - length of the hash output (in bytes)

iterations - amount of iterations

Returns:

a newly constructed PBKDF2WithHmacSHA512 instance

Throws:

InvalidHashException - if dkLength is > 64. This is because for password hashing, PBKDF dklength should never exceed the output length of the underlying hash function.