Module seppiko.commons.utils

Package org.seppiko.commons.utils.crypto

Class HashUtil

java.lang.Object

org.seppiko.commons.utils.crypto.HashUtil

public class HashUtil
extends Object

Hash utility

Author:

Leonard Woo

Method Summary

Modifier and Type	Method	Description
static byte[]	hmacHash(HmacAlgorithms algorithm, Provider provider, byte[] data, byte[] key)	Simplifies common Mac tasks.
static String	hmacHashString(HmacAlgorithms algorithm, Provider provider, byte[] data, byte[] key)	Simplifies common Mac tasks.
static byte[]	mdHash(MessageDigestAlgorithms algorithm, Provider provider, byte[] data)	Simplifies common MessageDigest tasks.
static String	mdHashString(MessageDigestAlgorithms algorithm, Provider provider, byte[] data)	Simplifies common MessageDigest tasks.
static byte[]	pbkdf2Hash(HmacAlgorithms algorithm, Provider provider, char[] password, byte[] salt, int iterations, int keySize)	Simplifies common PBKDF2 tasks
static String	pbkdf2HashString(HmacAlgorithms algorithm, Provider provider, char[] password, byte[] salt, int iterations, int keySize)	Simplifies common PBKDF2 tasks with Base64 and PHC String Format

Methods inherited from class java.lang.Object

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

Method Details

mdHash

public static byte[] mdHash(MessageDigestAlgorithms algorithm,
 Provider provider,
 byte[] data)
                     throws IllegalArgumentException

Simplifies common MessageDigest tasks.

Parameters:

algorithm - Message Digest Algorithm

provider - Hash provider, null is use default provider

data - data to hash

Returns:

complete hash value

Throws:

IllegalArgumentException - when a NoSuchAlgorithmException is caught.

mdHashString

public static String mdHashString(MessageDigestAlgorithms algorithm,
 Provider provider,
 byte[] data)
                           throws IllegalArgumentException

Simplifies common MessageDigest tasks.

Parameters:

algorithm - Message Digest Algorithm

provider - Hash provider, null is use default provider

data - data to hash

Returns:

complete hash string

Throws:

IllegalArgumentException - when a NoSuchAlgorithmException is caught.

hmacHash

public static byte[] hmacHash(HmacAlgorithms algorithm,
 Provider provider,
 byte[] data,
 byte[] key)
                       throws InvalidKeyException,
IllegalArgumentException

Simplifies common Mac tasks.

Parameters:

algorithm - Hmac Algorithm

provider - Hash provider, null is use default provider

data - data to hash with key

key - the keyed digest

Returns:

complete hash value including key

Throws:

InvalidKeyException - if the given key is null or does not match the allowed pattern.

IllegalArgumentException - when a NoSuchAlgorithmException is caught.

hmacHashString

public static String hmacHashString(HmacAlgorithms algorithm,
 Provider provider,
 byte[] data,
 byte[] key)
                             throws InvalidKeyException,
IllegalArgumentException

Simplifies common Mac tasks.

Parameters:

algorithm - Hmac Algorithm

provider - Hash provider, null is use default provider

data - data to hash with key

key - the keyed digest

Returns:

complete hash string including key

Throws:

InvalidKeyException - if the given key is null or does not match the allowed pattern.

IllegalArgumentException - when a NoSuchAlgorithmException is caught.

pbkdf2Hash

public static byte[] pbkdf2Hash(HmacAlgorithms algorithm,
 Provider provider,
 char[] password,
 byte[] salt,
 int iterations,
 int keySize)
                         throws IllegalArgumentException

Simplifies common PBKDF2 tasks

Parameters:

algorithm - PBKDF2With<Hmac Algorithm>

provider - Hash provider, null is use default provider

password - raw password

salt - password salt

iterations - iteration

keySize - key size

Returns:

PBKDF2With<Hmac Algorithm> password

Throws:

IllegalArgumentException - password or salt is null, number is wrong or could not execute task.

pbkdf2HashString

public static String pbkdf2HashString(HmacAlgorithms algorithm,
 Provider provider,
 char[] password,
 byte[] salt,
 int iterations,
 int keySize)
                               throws IllegalArgumentException

Simplifies common PBKDF2 tasks with Base64 and PHC String Format

Parameters:

algorithm - PBKDF2With<Hmac Algorithm>

provider - Hash provider, null is use default provider

password - raw password

salt - password salt

iterations - iteration

keySize - key size, usually is salt length * 8

Returns:

PBKDF2With<Hmac Algorithm> with PHC String

Throws:

IllegalArgumentException - password or salt is null, number is wrong or could not execute task.

See Also:

• PHC String Format