org.cryptacular.spec

Class DigestSpec

java.lang.Object

org.cryptacular.spec.DigestSpec

All Implemented Interfaces:

Spec<org.bouncycastle.crypto.Digest>

public class DigestSpec
extends Object
implements Spec<org.bouncycastle.crypto.Digest>

Describes a message digest function by name and provides a means to create a new instance of the digest via the newInstance() method.

Author:

Middleware Services

Constructor Summary

Constructors

Constructor and Description
DigestSpec(String algName) Creates a new instance from the given algorithm name.
DigestSpec(String algName, int digestSize) Constructor for digests that have variable output size, e.g.

Method Summary

Methods

Modifier and Type	Method and Description
String	getAlgorithm()
int	getSize()
org.bouncycastle.crypto.Digest	newInstance() Creates a new digest instance.
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

DigestSpec

public DigestSpec(String algName)

Creates a new instance from the given algorithm name.

Parameters:

algName - Digest algorithm name.

DigestSpec

public DigestSpec(String algName,
          int digestSize)

Constructor for digests that have variable output size, e.g. SHA3.

Parameters:

algName - Digest algorithm name.

digestSize - Size of resultant digest in bits.

Method Detail

getAlgorithm

public String getAlgorithm()

Specified by:

getAlgorithm in interface Spec<org.bouncycastle.crypto.Digest>

Returns:

Cryptographic algorithm name.

getSize

public int getSize()

Returns:

Size of digest output in bytes, or -1 if the digest does not support variable size output.

newInstance

public org.bouncycastle.crypto.Digest newInstance()

Creates a new digest instance.

Specified by:

newInstance in interface Spec<org.bouncycastle.crypto.Digest>

Returns:

Digest instance.

toString

public String toString()

Overrides:

toString in class Object