at.chrl.nutils

Class PasswordHash

java.lang.Object

at.chrl.nutils.PasswordHash

public class PasswordHash
extends Object

PBKDF2 salted password hashing. Author: havoc AT defuse.ca www: http://crackstation.net/hashing-security.htm

Field Summary

Fields

Modifier and Type	Field and Description
static int	HASH_BYTE_SIZE
static int	ITERATION_INDEX
static String	PBKDF2_ALGORITHM
static int	PBKDF2_INDEX
static int	PBKDF2_ITERATIONS
static int	SALT_BYTE_SIZE
static int	SALT_INDEX

Constructor Summary

Constructors

Constructor and Description
PasswordHash()

Method Summary

Modifier and Type	Method and Description
static String	createHash(char[] password) Returns a salted PBKDF2 hash of the password.
static String	createHash(String password) Returns a salted PBKDF2 hash of the password.
static void	main(String[] args) Tests the basic functionality of the PasswordHash class
static boolean	validatePassword(char[] password, String correctHash) Validates a password using a hash.
static boolean	validatePassword(String password, String correctHash) Validates a password using a hash.

Methods inherited from class java.lang.Object

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

Field Detail

PBKDF2_ALGORITHM

public static final String PBKDF2_ALGORITHM

See Also:

Constant Field Values

SALT_BYTE_SIZE

public static final int SALT_BYTE_SIZE

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Constant Field Values

HASH_BYTE_SIZE

public static final int HASH_BYTE_SIZE

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Constant Field Values

PBKDF2_ITERATIONS

public static final int PBKDF2_ITERATIONS

See Also:

Constant Field Values

ITERATION_INDEX

public static final int ITERATION_INDEX

See Also:

Constant Field Values

SALT_INDEX

public static final int SALT_INDEX

See Also:

Constant Field Values

PBKDF2_INDEX

public static final int PBKDF2_INDEX

See Also:

Constant Field Values

Constructor Detail

PasswordHash

public PasswordHash()

Method Detail

createHash

public static String createHash(String password)
                         throws NoSuchAlgorithmException,
                                InvalidKeySpecException

Returns a salted PBKDF2 hash of the password.

Parameters:

password - the password to hash

Returns:

a salted PBKDF2 hash of the password

Throws:

NoSuchAlgorithmException

InvalidKeySpecException

createHash

public static String createHash(char[] password)
                         throws NoSuchAlgorithmException,
                                InvalidKeySpecException

Returns a salted PBKDF2 hash of the password.

Parameters:

password - the password to hash

Returns:

a salted PBKDF2 hash of the password

Throws:

NoSuchAlgorithmException

InvalidKeySpecException

validatePassword

public static boolean validatePassword(String password,
                                       String correctHash)
                                throws NoSuchAlgorithmException,
                                       InvalidKeySpecException

Validates a password using a hash.

Parameters:

password - the password to check

correctHash - the hash of the valid password

Returns:

true if the password is correct, false if not

Throws:

NoSuchAlgorithmException

InvalidKeySpecException

validatePassword

public static boolean validatePassword(char[] password,
                                       String correctHash)
                                throws NoSuchAlgorithmException,
                                       InvalidKeySpecException

Validates a password using a hash.

Parameters:

password - the password to check

correctHash - the hash of the valid password

Returns:

true if the password is correct, false if not

Throws:

NoSuchAlgorithmException

InvalidKeySpecException

main

public static void main(String[] args)

Tests the basic functionality of the PasswordHash class

Parameters:

args - ignored