com.sshtools.common.ssh.components.jce

Class Ssh2DsaPublicKey

java.lang.Object

com.sshtools.common.ssh.components.jce.Ssh2DsaPublicKey

All Implemented Interfaces:

SshDsaPublicKey, SshPublicKey, SecureComponent

public class Ssh2DsaPublicKey
extends java.lang.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 java.security.interfaces.DSAPublicKey	pubkey

Constructor Summary

Constructors

Constructor and Description
Ssh2DsaPublicKey()
Ssh2DsaPublicKey(java.math.BigInteger p, java.math.BigInteger q, java.math.BigInteger g, java.math.BigInteger y)
Ssh2DsaPublicKey(java.security.interfaces.DSAPublicKey pub)

Method Summary

Modifier and Type	Method and Description
boolean	equals(java.lang.Object obj)
java.lang.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.
java.lang.String	getEncodingAlgorithm() The algorithm name used in the encoding of the public key
java.lang.String	getFingerprint() Return an SSH fingerprint of the public key
java.math.BigInteger	getG()
java.security.interfaces.DSAPublicKey	getJCEPublicKey() Return the JCE component for this key.
java.math.BigInteger	getP()
int	getPriority()
java.math.BigInteger	getQ()
SecurityLevel	getSecurityLevel()
java.lang.String	getSigningAlgorithm() The algorithm name expected to be encoded in SSH signatures
java.math.BigInteger	getY()
int	hashCode()
void	init(byte[] blob, int start, int len) Initialize the public key from a blob of binary data.
java.lang.String	test() Test the JCE for algorithm availability.
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

Methods inherited from interface com.sshtools.common.ssh.components.SshPublicKey

isCertificate

Field Detail

pubkey

protected java.security.interfaces.DSAPublicKey pubkey

Constructor Detail

Ssh2DsaPublicKey

public Ssh2DsaPublicKey()

Ssh2DsaPublicKey

public Ssh2DsaPublicKey(java.security.interfaces.DSAPublicKey pub)

Ssh2DsaPublicKey

public Ssh2DsaPublicKey(java.math.BigInteger p,
                        java.math.BigInteger q,
                        java.math.BigInteger g,
                        java.math.BigInteger y)
                 throws java.security.NoSuchAlgorithmException,
                        java.security.spec.InvalidKeySpecException

Throws:

java.security.NoSuchAlgorithmException

java.security.spec.InvalidKeySpecException

Method Detail

getSecurityLevel

public SecurityLevel getSecurityLevel()

Specified by:

getSecurityLevel in interface SecureComponent

getPriority

public int getPriority()

Specified by:

getPriority in interface SecureComponent

getJCEPublicKey

public java.security.interfaces.DSAPublicKey getJCEPublicKey()

Description copied from interface: SshPublicKey

Return the JCE component for this key.

Specified by:

getJCEPublicKey in interface SshDsaPublicKey

Specified by:

getJCEPublicKey in interface SshPublicKey

Returns:

getAlgorithm

public java.lang.String getAlgorithm()

Get the algorithm name for the public key.

Specified by:

getAlgorithm in interface SshPublicKey

Specified by:

getAlgorithm in interface SecureComponent

Returns:

the algorithm name, for example "ssh-dss"

getEncodingAlgorithm

public java.lang.String getEncodingAlgorithm()

Description copied from interface: SshPublicKey

The algorithm name used in the encoding of the public key

Specified by:

getEncodingAlgorithm in interface SshPublicKey

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 java.lang.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(java.lang.Object obj)

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

getG

public java.math.BigInteger getG()

Specified by:

getG in interface SshDsaPublicKey

getP

public java.math.BigInteger getP()

Specified by:

getP in interface SshDsaPublicKey

getQ

public java.math.BigInteger getQ()

Specified by:

getQ in interface SshDsaPublicKey

getY

public java.math.BigInteger getY()

Specified by:

getY in interface SshDsaPublicKey

test

public java.lang.String test()

Description copied from interface: SshPublicKey

Test the JCE for algorithm availability.

Specified by:

test in interface SshPublicKey

Returns:

getSigningAlgorithm

public java.lang.String getSigningAlgorithm()

Description copied from interface: SshPublicKey

The algorithm name expected to be encoded in SSH signatures

Specified by:

getSigningAlgorithm in interface SshPublicKey