com.codeheadsystems.shash

Interface Hasher

All Known Implementing Classes:

HasherImpl

public interface Hasher

Provides access to standard hasher structure. Really the Hasher just wraps the hashing algorithm with useful stuff. The interface exists only so that you can mock it as needed.

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.
byte[]	hash(byte[] salt, byte[] bytesToHash) Will hash the bytes given and return a 'sized' salted hash depending on the algorithm picked on creation.
byte[]	hash(byte[] salt, java.lang.String hashingWord) 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[] previousHash, 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.

Method Detail

hash

HashHolder hash(byte[] bytes)

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

Parameters:

bytes - from the payload.

Returns:

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

hash

HashHolder hash(java.lang.String hashingWord)

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

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.

hash

byte[] hash(byte[] salt,
            byte[] bytesToHash)

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

Parameters:

salt - that was used originally to generate the hash

bytesToHash - bytes that you want to hash and see what you get.

Returns:

bytes[] that are produced by this hashing technique

hash

byte[] hash(byte[] salt,
            java.lang.String hashingWord)

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

Parameters:

salt - that was used originally to generate the hash

hashingWord - The payload to hash with the salt.

Returns:

bytes[] that are produced by this hashing technique

generateSalt

byte[] generateSalt()

Provides access to a salt for this specific hasher.

Returns:

byte[] with the salt

isSame

boolean isSame(HashHolder hashHolder,
               byte[] payload)

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

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

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

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.

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

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

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

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

isSame

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

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

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