com.maverick.ssh.components.standalone
Class Ssh2DsaPublicKey

java.lang.Object
  com.maverick.crypto.publickey.DsaKey
      com.maverick.crypto.publickey.DsaPublicKey
          com.maverick.ssh.components.standalone.Ssh2DsaPublicKey

All Implemented Interfaces:

com.maverick.crypto.publickey.PublicKey, SshDsaPublicKey, SshPublicKey

public class Ssh2DsaPublicKey

extends com.maverick.crypto.publickey.DsaPublicKey

implements SshDsaPublicKey

Represents an SSH2 DSA public key.

Author:

Lee David Painter

Field Summary

Fields inherited from class com.maverick.crypto.publickey.DsaPublicKey

y

Fields inherited from class com.maverick.crypto.publickey.DsaKey

g, p, q

Constructor Summary

Ssh2DsaPublicKey()
Default contructor used to initialize the key from an encoded byte array using the init method.

Ssh2DsaPublicKey(java.math.BigInteger p, java.math.BigInteger q, java.math.BigInteger g, java.math.BigInteger y)
Construct a DSA key from the parameters.

Method Summary

boolean	equals(java.lang.Object obj)
java.lang.String	getAlgorithm() The algorithm name is "ssh-dss"
byte[]	getEncoded() Returns the key encoded into a byte array as defined in the SSH Transport Protocol.
java.lang.String	getFingerprint() Return an SSH fingerprint of the public key
int	hashCode()
void	init(byte[] blob, int start, int len) Initialize the public key from an SSH2 key blob
boolean	verifySignature(byte[] signature, byte[] data) Verify the signature.

Methods inherited from class com.maverick.crypto.publickey.DsaPublicKey

getBitLength, getY, verifySignature

Methods inherited from class com.maverick.crypto.publickey.DsaKey

getG, getP, getQ

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.maverick.ssh.components.SshDsaPublicKey

getG, getP, getQ, getY

Methods inherited from interface com.maverick.ssh.components.SshPublicKey

getBitLength

Constructor Detail

Ssh2DsaPublicKey

public Ssh2DsaPublicKey(java.math.BigInteger p,
                        java.math.BigInteger q,
                        java.math.BigInteger g,
                        java.math.BigInteger y)

Construct a DSA key from the parameters.

Parameters:

p -

q -

g -

y -

Ssh2DsaPublicKey

public Ssh2DsaPublicKey()

Default contructor used to initialize the key from an encoded byte array using the init method.

Method Detail

getAlgorithm

public java.lang.String getAlgorithm()

The algorithm name is "ssh-dss"

Specified by:

getAlgorithm in interface SshPublicKey

Returns:

the algorithm name, for example "ssh-dss"

getEncoded

public byte[] getEncoded()
                  throws SshException

Returns the key encoded into a byte array as defined in the SSH Transport Protocol.

The "ssh-dss" public key format has the following specific encoding:

  String         "ssh-dss"
  BigInteger     p
  BigInteger     q
  BigInteger     g
  BigInteger     y

Specified by:

getEncoded in interface SshPublicKey

Returns:

the encoded format.

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:

String

Throws:

SshException

init

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

Initialize the public key from an SSH2 key blob

Specified by:

init in interface SshPublicKey

Parameters:

blob - the SSH2 encoded key

start - the offset in the key data to start reading

len - the length of the key data

Throws:

java.io.IOException

SshException

verifySignature

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

Description copied from interface: SshPublicKey

Verify the signature.

Specified by:

verifySignature in interface SshPublicKey

Parameters:

signature -

Returns:

true if the signature is valid, otherwise false

equals

public boolean equals(java.lang.Object obj)

hashCode

public int hashCode()