org.cryptimeleon.math.hash.impl

Class SHA256HashFunction

java.lang.Object

org.cryptimeleon.math.hash.impl.SHA256HashFunction

All Implemented Interfaces:

HashFunction, Representable, StandaloneRepresentable

public class SHA256HashFunction
extends java.lang.Object

Implementation of the SHA-256 hash function.

Field Summary

Fields

Modifier and Type	Field and Description
protected java.lang.String	algorithm The hash algorithms used by this hash function.

Constructor Summary

Constructors

Constructor and Description
SHA256HashFunction()
SHA256HashFunction(Representation repr)

Method Summary

Modifier and Type	Method and Description
boolean	equals(java.lang.Object obj)
int	getOutputLength() Returns the output-length of the HashFunction in bytes.
Representation	getRepresentation() The representation of this object.
byte[]	hash(byte[] bytes) Applies this hash function to the given byte[].
byte[]	hash(UniqueByteRepresentable ubr) Applies this hash function to the given UniqueByteRepresentable.
int	hashCode()

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.cryptimeleon.math.hash.HashFunction

hash

Field Detail

algorithm

protected final java.lang.String algorithm

The hash algorithms used by this hash function.

Constructor Detail

SHA256HashFunction

public SHA256HashFunction(Representation repr)

SHA256HashFunction

public SHA256HashFunction()

Method Detail

getOutputLength

public int getOutputLength()

Description copied from interface: HashFunction

Returns the output-length of the HashFunction in bytes.

Returns:

the output-length in bytes

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

equals

public boolean equals(java.lang.Object obj)

Overrides:

equals in class java.lang.Object

hash

public byte[] hash(UniqueByteRepresentable ubr)

Applies this hash function to the given UniqueByteRepresentable.

Specified by:

hash in interface HashFunction

Parameters:

ubr - the UniqueByteRepresentable to hash.

Returns:

the output of the hash function in form of a byte[]

getRepresentation

public Representation getRepresentation()

Description copied from interface: Representable

The representation of this object. Used for serialization. A convenient way to implement this is using @link ReprUtil

Specified by:

getRepresentation in interface Representable

Returns:

a Representation or null if an equal object can be recreated without any information.

See Also:

Representation

hash

public byte[] hash(byte[] bytes)

Applies this hash function to the given byte[].

Specified by:

hash in interface HashFunction

Parameters:

bytes - the byte[] to hash.

Returns:

the output of the hash function in form of a byte[]