com.codeheadsystems.shash.impl

Class HasherImpl

java.lang.Object

com.codeheadsystems.shash.impl.HasherImpl

All Implemented Interfaces:

Hasher

public class HasherImpl
extends java.lang.Object
implements Hasher

Constructor Summary

Constructors

Constructor and Description
HasherImpl(int saltSize, RandomProvider randomProvider, HashAlgorithm hashAlgorithm)

Method Summary

Modifier and Type	Method and Description
byte[]	generateSalt() Provides access to a salt for this specific hasher.
HashHolder	hash(byte[] bytes) Will hash the bytes given and return a 'sized' salted hash depending on the algorithm picked on creation.
HashHolder	hash(java.lang.String hashingWord) Will hash the bytes given and return a 'sized' salted hash depending on the algorithm picked on creation.
boolean	isSame(byte[] salt, byte[] previousHash, byte[] payload) Compares a previously hashed set of bytes with a new payload.
boolean	isSame(byte[] salt, byte[] hash, java.lang.String payload) Compares a previously hashed set of bytes with a new payload.
boolean	isSame(HashHolder hashHolder, byte[] payload) Compares a previously hashed set of bytes with a new payload.
boolean	isSame(HashHolder hashHolder, java.lang.String payload) Compares a previously hashed set of bytes with a new payload.

Methods inherited from class java.lang.Object

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

Constructor Detail

HasherImpl

public HasherImpl(int saltSize,
                  RandomProvider randomProvider,
                  HashAlgorithm hashAlgorithm)

Method Detail

hash

public HashHolder hash(byte[] bytes)

Description copied from interface: Hasher

Will hash the bytes given and return a 'sized' salted hash depending on the algorithm picked on creation. Salt is automatically generated.

Specified by:

hash in interface Hasher

Parameters:

bytes - from the payload.

Returns:

HashHolder of a fixed size depending on how this was created, plus the salt.

hash

public HashHolder hash(java.lang.String hashingWord)

Description copied from interface: Hasher

Will hash the bytes given and return a 'sized' salted hash depending on the algorithm picked on creation. Salt is automatically generated.

Specified by:

hash in interface Hasher

Parameters:

hashingWord - for the payload, converted to bytes in a consistent way for this hasher.

Returns:

HashHolder of a fixed size depending on how this was created, plus the salt.

generateSalt

public byte[] generateSalt()

Description copied from interface: Hasher

Provides access to a salt for this specific hasher.

Specified by:

generateSalt in interface Hasher

Returns:

byte[] with the salt

isSame

public boolean isSame(HashHolder hashHolder,
                      byte[] payload)

Description copied from interface: Hasher

Compares a previously hashed set of bytes with a new payload. The salt is taken from the hashedBytes.

Specified by:

isSame in interface Hasher

Parameters:

hashHolder - the previously hashed word with salt.

payload - The payload to hash with the salt and check against the hashedBytes given

Returns:

boolean to say if they are the same or not

isSame

public boolean isSame(HashHolder hashHolder,
                      java.lang.String payload)

Description copied from interface: Hasher

Compares a previously hashed set of bytes with a new payload. The salt is taken from the hashedBytes. Note this will convert the payload to a byte[] in a consistent manner.

Specified by:

isSame in interface Hasher

Parameters:

hashHolder - the previously hashed word with salt.

payload - The payload to hash with the salt and check against the hashedBytes given

Returns:

boolean to say if they are the same or not

isSame

public boolean isSame(byte[] salt,
                      byte[] hash,
                      java.lang.String payload)

Description copied from interface: Hasher

Compares a previously hashed set of bytes with a new payload. Note this will convert the payload to a byte[] in a consistent manner.

Specified by:

isSame in interface Hasher

Parameters:

salt - that was used originally to generate the hash

hash - generated from the original text/bytes

payload - The incoming payload you want to check

Returns:

boolean to say if they are the same or not

isSame

public boolean isSame(byte[] salt,
                      byte[] previousHash,
                      byte[] payload)

Description copied from interface: Hasher

Compares a previously hashed set of bytes with a new payload. Note this will convert the payload to a byte[] in a consistent manner.

Specified by:

isSame in interface Hasher

Parameters:

salt - that was used originally to generate the hash

previousHash - generated from the original text/bytes

payload - The incoming payload you want to check

Returns:

boolean to say if they are the same or not