com.sshtools.ssh.components.jce

Class Ssh2DsaPublicKey

java.lang.Object

com.sshtools.ssh.components.jce.Ssh2DsaPublicKey

All Implemented Interfaces:

SshDsaPublicKey, SshPublicKey

Direct Known Subclasses:

SshX509DsaPublicKey

public class Ssh2DsaPublicKey
extends Object
implements SshDsaPublicKey

A DSA public key implementation which uses a JCE provider.

Author:

Lee David Painter

Field Summary

Fields

Modifier and Type	Field and Description
protected DSAPublicKey	pubkey

Constructor Summary

Constructors

Constructor and Description
Ssh2DsaPublicKey()
Ssh2DsaPublicKey(BigInteger p, BigInteger q, BigInteger g, BigInteger y)
Ssh2DsaPublicKey(DSAPublicKey pub)

Method Summary

Methods

Modifier and Type	Method and Description
boolean	equals(Object obj)
String	getAlgorithm() Get the algorithm name for the public key.
int	getBitLength() Get the bit length of the public key
byte[]	getEncoded() Encode the public key into a blob of binary data, the encoded result will be passed into init to recreate the key.
String	getFingerprint() Return an SSH fingerprint of the public key
BigInteger	getG()
BigInteger	getP()
BigInteger	getQ()
BigInteger	getY()
int	hashCode()
void	init(byte[] blob, int start, int len) Initialize the public key from a blob of binary data.
boolean	verifySignature(byte[] signature, byte[] data) Verify the signature.

Methods inherited from class java.lang.Object

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

Field Detail

pubkey

protected DSAPublicKey pubkey

Constructor Detail

Ssh2DsaPublicKey

public Ssh2DsaPublicKey()

Ssh2DsaPublicKey

public Ssh2DsaPublicKey(DSAPublicKey pub)

Ssh2DsaPublicKey

public Ssh2DsaPublicKey(BigInteger p,
                BigInteger q,
                BigInteger g,
                BigInteger y)
                 throws NoSuchAlgorithmException,
                        InvalidKeySpecException

Throws:

NoSuchAlgorithmException

InvalidKeySpecException

Method Detail

getAlgorithm

public String getAlgorithm()

Get the algorithm name for the public key.

Specified by:

getAlgorithm in interface SshPublicKey

Returns:

the algorithm name, for example "ssh-dss"

getBitLength

public int getBitLength()

Description copied from interface: SshPublicKey

Get the bit length of the public key

Specified by:

getBitLength in interface SshPublicKey

Returns:

the bit length of the public key

getEncoded

public byte[] getEncoded()
                  throws SshException

Encode the public key into a blob of binary data, the encoded result will be passed into init to recreate the key.

Specified by:

getEncoded in interface SshPublicKey

Returns:

an encoded byte array

Throws:

SshException

getFingerprint

public String getFingerprint()
                      throws SshException

Description copied from interface: SshPublicKey

Return an SSH fingerprint of the public key

Specified by:

getFingerprint in interface SshPublicKey

Returns:

java.lang.String

Throws:

SshException

init

public void init(byte[] blob,
        int start,
        int len)
          throws SshException

Initialize the public key from a blob of binary data.

Specified by:

init in interface SshPublicKey

Parameters:

blob - byte[]

start - int

len - int

Throws:

SshException

verifySignature

public boolean verifySignature(byte[] signature,
                      byte[] data)
                        throws SshException

Verify the signature.

Specified by:

verifySignature in interface SshPublicKey

Parameters:

signature - byte[]

data - byte[]

Returns:

true if the signature was produced by the corresponding private key that owns this public key, otherwise false.

Throws:

SshException

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

getG

public BigInteger getG()

Specified by:

getG in interface SshDsaPublicKey

getP

public BigInteger getP()

Specified by:

getP in interface SshDsaPublicKey

getQ

public BigInteger getQ()

Specified by:

getQ in interface SshDsaPublicKey

getY

public BigInteger getY()

Specified by:

getY in interface SshDsaPublicKey