com.cloudhopper.commons.util

Class Hasher

java.lang.Object

com.cloudhopper.commons.util.Hasher

public class Hasher
extends Object

Utility class to hash strings (such as passwords).

• MD5 - hash is always 16 bytes, 32 char hex string, 24 char base-64
• SHA1 - hash is always 20 bytes, 40 char hex string, 28 char base-64
• SHA256 - hash is always 32 bytes, 64 char hex string, 44 char base-64
• SHA512 - hash is always 64 bytes, 128 char hex string, 88 char base-64

NOTE: These are only 1-way hashes, you won't be able to decrypt the string.

Author:

joelauer (twitter: @jjlauer or http://twitter.com/jjlauer)

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	Hasher.Algorithm Enum that represents each different algorithm supported by the Hasher.

Constructor Summary

Constructors

Constructor and Description
Hasher()
Hasher(Hasher.Algorithm algorithm)

Method Summary

Methods

Modifier and Type	Method and Description
String	toHashedBase64String(byte[] bytes) Hashes the input bytes into a Base-64 encoded hashed String.
String	toHashedBase64String(String string0) Hashes the input String into a Base-64 encoded hashed String.
byte[]	toHashedBytes(byte[] bytes) Hashes the input bytes into a hashed byte[] -- no special encoding.
String	toHashedHexString(byte[] bytes) Hashes the input bytes into a hex encoded hashed String.
String	toHashedHexString(String string0) Hashes the input String into a hex encoded hashed String.

Methods inherited from class java.lang.Object

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

Constructor Detail

Hasher

public Hasher()

Hasher

public Hasher(Hasher.Algorithm algorithm)

Method Detail

toHashedHexString

public String toHashedHexString(String string0)
                         throws NoSuchAlgorithmException

Hashes the input String into a hex encoded hashed String.

• MD5 - hash is always 32 char hex string
• SHA1 - hash is always 40 char hex string
• SHA256 - hash is always 64 char hex string
• SHA512 - hash is always 128 char hex string

Parameters:

string0 - The String to hash. This assumes its an ASCII string.

Returns:

The hex encoded hashed String

Throws:

NoSuchAlgorithmException

toHashedHexString

public String toHashedHexString(byte[] bytes)
                         throws NoSuchAlgorithmException

Hashes the input bytes into a hex encoded hashed String.

• MD5 - hash is always 32 char hex string
• SHA1 - hash is always 40 char hex string
• SHA256 - hash is always 64 char hex string
• SHA512 - hash is always 128 char hex string

Parameters:

bytes - The bytes to hash

Returns:

The hex encoded hashed String

Throws:

NoSuchAlgorithmException

toHashedBase64String

public String toHashedBase64String(String string0)
                            throws NoSuchAlgorithmException

Hashes the input String into a Base-64 encoded hashed String.

• MD5 - hash is always 24 char base-64
• SHA1 - hash is always 28 char base-64
• SHA256 - hash is always 44 char base-64
• SHA512 - hash is always 88 char base-64

Parameters:

string0 - The String to hash. This assumes its an ASCII string.

Returns:

The Base-64 encoded hashed String

Throws:

NoSuchAlgorithmException

toHashedBase64String

public String toHashedBase64String(byte[] bytes)
                            throws NoSuchAlgorithmException

Hashes the input bytes into a Base-64 encoded hashed String.

• MD5 - hash is always 24 char base-64
• SHA1 - hash is always 28 char base-64
• SHA256 - hash is always 44 char base-64
• SHA512 - hash is always 88 char base-64

Parameters:

bytes - The bytes to hash

Returns:

The Base-64 encoded hashed String

Throws:

NoSuchAlgorithmException

toHashedBytes

public byte[] toHashedBytes(byte[] bytes)
                     throws NoSuchAlgorithmException

Hashes the input bytes into a hashed byte[] -- no special encoding.

• MD5 - hash is always 16 bytes
• SHA1 - hash is always 20 bytes
• SHA256 - hash is always 32 bytes
• SHA512 - hash is always 64 bytes

Parameters:

bytes - The bytes to hash

Returns:

The hashed byte[]

Throws:

NoSuchAlgorithmException