org.apache.sshd.common.signature

Class AbstractSignature

java.lang.Object

org.apache.sshd.common.signature.AbstractSignature

All Implemented Interfaces:

Signature

Direct Known Subclasses:

SignatureDSA, SignatureECDSA, SignatureRSA

public abstract class AbstractSignature
extends Object
implements Signature

TODO Add javadoc

Author:

Apache MINA SSHD Project

Field Summary

Fields

Modifier and Type	Field and Description
protected Signature	signature

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	AbstractSignature(String algorithm)

Method Summary

Modifier and Type	Method and Description
protected Pair<String,byte[]>	extractEncodedSignature(byte[] sig) Makes an attempt to detect if the signature is encoded or pure data
String	getAlgorithm()
void	initSigner(PrivateKey key)
void	initVerifier(PublicKey key)
String	toString()
void	update(byte[] hash) Update the computed signature with the given data
void	update(byte[] hash, int off, int len) Update the computed signature with the given data

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.sshd.common.signature.Signature

sign, verify

Field Detail

signature

protected Signature signature

Constructor Detail

AbstractSignature

protected AbstractSignature(String algorithm)

Method Detail

getAlgorithm

public final String getAlgorithm()

Specified by:

getAlgorithm in interface Signature

Returns:

The signature algorithm name

initVerifier

public void initVerifier(PublicKey key)
                  throws Exception

Specified by:

initVerifier in interface Signature

Parameters:

key - The PublicKey to be used for verifying signatures

Throws:

Exception - If failed to initialize

initSigner

public void initSigner(PrivateKey key)
                throws Exception

Specified by:

initSigner in interface Signature

Parameters:

key - The PrivateKey to be used for signing

Throws:

Exception - If failed to initialize

update

public void update(byte[] hash)
            throws Exception

Description copied from interface: Signature

Update the computed signature with the given data

Specified by:

update in interface Signature

Parameters:

hash - The hash data buffer

Throws:

Exception - If failed to update

See Also:

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

update

public void update(byte[] hash,
                   int off,
                   int len)
            throws Exception

Description copied from interface: Signature

Update the computed signature with the given data

Specified by:

update in interface Signature

Parameters:

hash - The hash data buffer

off - Offset of hash data in buffer

len - Length of hash data

Throws:

Exception - If failed to update

extractEncodedSignature

protected Pair<String,byte[]> extractEncodedSignature(byte[] sig)

Makes an attempt to detect if the signature is encoded or pure data

Parameters:

sig - The original signature

Returns:

A Pair where first value is the key type and second value is the data - null if not encoded

toString

public String toString()

Overrides:

toString in class Object