net.sf.mmm.crypto.asymmetric.sign

Class SignatureProcessorImplWithHash

java.lang.Object

net.sf.mmm.crypto.algorithm.AbstractSecurityAlgorithm

net.sf.mmm.crypto.asymmetric.sign.SignatureProcessorImplWithHash

All Implemented Interfaces:

CryptoAlgorithm, SignatureProcessor, CryptoChunker, CryptoProcessor

Direct Known Subclasses:

SignatureSignerImplCryptorWithHash, SignatureSignerImplWithHash, SignatureVerifierImplCryptorWithHash, SignatureVerifierImplWithHash

public abstract class SignatureProcessorImplWithHash
extends AbstractSecurityAlgorithm
implements SignatureProcessor

Implementation of SignatureProcessor combining a SignatureSigner with a HashCreator.

Since:

1.0.0

Author:

Joerg Hohwiller (hohwille at users.sourceforge.net)

Field Summary

Fields

Modifier and Type	Field and Description
private HashCreator	hashGenerator

Constructor Summary

Constructors

Constructor and Description
SignatureProcessorImplWithHash(HashCreator hashGenerator) The constructor.

Method Summary

Modifier and Type	Method and Description
String	getAlgorithm()
protected HashCreator	getHashGenerator()
protected abstract CryptoAlgorithm	getSignatureAlgorithm()
void	reset() Will reset the internal state of this object.
void	update(byte[] input, int offset, int length)

Methods inherited from class net.sf.mmm.crypto.algorithm.AbstractSecurityAlgorithm

creationFailedException, creationFailedException, creationFailedException, creationFailedException, getAlgorithm, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface net.sf.mmm.crypto.CryptoChunker

update, update

Methods inherited from interface net.sf.mmm.crypto.CryptoProcessor

process, process, process, process

Field Detail

hashGenerator

private final HashCreator hashGenerator

Constructor Detail

SignatureProcessorImplWithHash

public SignatureProcessorImplWithHash(HashCreator hashGenerator)

The constructor.

Parameters:

hashGenerator - the HashCreator to apply as extension.

Method Detail

getSignatureAlgorithm

protected abstract CryptoAlgorithm getSignatureAlgorithm()

Returns:

the CryptoAlgorithm to extend.

getHashGenerator

protected HashCreator getHashGenerator()

Returns:

the HashCreator to apply as extension.

getAlgorithm

public String getAlgorithm()

Specified by:

getAlgorithm in interface CryptoAlgorithm

Returns:

the name of the underlying algorithm (e.g. "RSA", "NONEwithECDSA", etc.).

See Also:

Key.getAlgorithm(), Signature.getAlgorithm(), MessageDigest.getAlgorithm(), SecureRandom.getAlgorithm(), Cipher.getAlgorithm()

update

public void update(byte[] input,
                   int offset,
                   int length)

Specified by:

update in interface CryptoChunker

Parameters:

input - the next chunk of data.

offset - the index where to start reading data from input.

length - the number of bytes to read from input.

See Also:

MessageDigest.update(byte[], int, int), Signature.update(byte[], int, int)

reset

public void reset()

Description copied from interface: CryptoProcessor

Will reset the internal state of this object. Please note that complex algorithms especially for Cryptor may not reusable. It is therefore preferable to always create a fresh instance for each cryptographic task.

Specified by:

reset in interface CryptoProcessor

See Also:

MessageDigest.reset()