Package com.io7m.idstore.model

Class IdPasswordAlgorithmPBKDF2HmacSHA256

java.lang.Object

com.io7m.idstore.model.IdPasswordAlgorithmPBKDF2HmacSHA256

All Implemented Interfaces:

IdPasswordAlgorithmType

public final class IdPasswordAlgorithmPBKDF2HmacSHA256
extends Object
implements IdPasswordAlgorithmType

The PBKDF2 hashing algorithm using a SHA-256 HMAC.

Method Summary

Modifier and Type	Method	Description
boolean	check(String expectedHash, String receivedPassword, byte[] salt)	Check if the given plain text password matches the expected hash.
static IdPasswordAlgorithmType	create()	Create an algorithm with a strong iteration count and key length.
static IdPasswordAlgorithmType	create(int iterationCount, int keyLength)	Create an algorithm with the given iteration count and key length.
IdPassword	createHashed(String passwordText, byte[] salt)	Create a hashed password.
boolean	equals(Object o)
int	hashCode()
String	identifier()

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.io7m.idstore.model.IdPasswordAlgorithmType

createHashed

Method Details

create

public static IdPasswordAlgorithmType create(int iterationCount,
 int keyLength)

Create an algorithm with the given iteration count and key length.

Parameters:

iterationCount - The iteration count

keyLength - The key length

Returns:

An algorithm

create

public static IdPasswordAlgorithmType create()

Create an algorithm with a strong iteration count and key length.

Returns:

An algorithm

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

check

public boolean check(String expectedHash,
 String receivedPassword,
 byte[] salt)
              throws IdPasswordException

Description copied from interface: IdPasswordAlgorithmType

Check if the given plain text password matches the expected hash.

Specified by:

check in interface IdPasswordAlgorithmType

Parameters:

expectedHash - The expected hexadecimal uppercase hash

receivedPassword - The received plain text password

salt - The salt value

Returns:

true if the password matches

Throws:

IdPasswordException - On internal errors such as missing algorithm support

createHashed

public IdPassword createHashed(String passwordText,
 byte[] salt)
                        throws IdPasswordException

Description copied from interface: IdPasswordAlgorithmType

Create a hashed password.

Specified by:

createHashed in interface IdPasswordAlgorithmType

Parameters:

passwordText - The plain text password

salt - A random salt value

Returns:

A hashed password

Throws:

IdPasswordException - On internal errors such as missing algorithm support

identifier

public String identifier()

Specified by:

identifier in interface IdPasswordAlgorithmType

Returns:

The password algorithm identifier