org.cryptacular.spec

Class DigestSpec

java.lang.Object

org.cryptacular.spec.DigestSpec

All Implemented Interfaces:

Spec<org.bouncycastle.crypto.Digest>

public class DigestSpec
extends java.lang.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.

Field Summary

Fields

Modifier and Type	Field and Description
private java.lang.String	algorithm Digest algorithm name.
private int	size Requested size of variable-size hash algorithms, e.g.

Constructor Summary

Constructors

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

Method Summary

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

Methods inherited from class java.lang.Object

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

Field Detail

algorithm

private final java.lang.String algorithm

Digest algorithm name.

size

private final int size

Requested size of variable-size hash algorithms, e.g. SHA-3. -1 for hashes with fixed size outputs.

Constructor Detail

DigestSpec

public DigestSpec(java.lang.String algName)

Creates a new instance from the given algorithm name.

Parameters:

algName - Digest algorithm name.

DigestSpec

public DigestSpec(java.lang.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 java.lang.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 java.lang.String toString()

Overrides:

toString in class java.lang.Object