gnu.crypto.key.srp6
Class SRPKey

java.lang.Object
  gnu.crypto.key.srp6.SRPKey

All Implemented Interfaces:

java.security.Key, java.io.Serializable

Direct Known Subclasses:

SRPPrivateKey, SRPPublicKey

public abstract class SRPKey

extends java.lang.Object

implements java.security.Key, java.io.Serializable

An abstract representation of a base SRP ephemeral key.

This object encapsulates the two numbers:

• N: A large safe prime (N = 2q+1, where q is prime).
• g: A generator modulo N.

Note that in SRP, all arithmetic is done modulo N.

Reference:

1. SRP Protocol Design
   Thomas J. Wu.

Version:

$Revision: 1.2 $

See Also:

Serialized Form

Field Summary

protected java.math.BigInteger	g The generator.
protected java.math.BigInteger	N The public, Germaine prime, shared modulus.

Fields inherited from interface java.security.Key

serialVersionUID

Constructor Summary

protected

SRPKey(java.math.BigInteger N, java.math.BigInteger g)

Method Summary

boolean	equals(java.lang.Object obj) Returns true if the designated object is an instance of SRPKey and has the same SRP parameter values as this one.
java.lang.String	getAlgorithm() Returns the standard algorithm name for this key.
byte[]	getEncoded() Deprecated. see getEncoded(int).
abstract byte[]	getEncoded(int format)
java.lang.String	getFormat() Returns null since this implementation does not encode SRP keys.
java.math.BigInteger	getG() Returns the generator.
java.math.BigInteger	getN() Returns the public shared modulus.

Methods inherited from class java.lang.Object

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

Field Detail

N

protected final java.math.BigInteger N

The public, Germaine prime, shared modulus.

g

protected final java.math.BigInteger g

The generator.

Constructor Detail

SRPKey

protected SRPKey(java.math.BigInteger N,
                 java.math.BigInteger g)

Method Detail

getAlgorithm

public java.lang.String getAlgorithm()

Returns the standard algorithm name for this key.

Specified by:

getAlgorithm in interface java.security.Key

Returns:

the standard algorithm name for this key.

getEncoded

public byte[] getEncoded()

Deprecated. see getEncoded(int).

Specified by:

getEncoded in interface java.security.Key

getFormat

public java.lang.String getFormat()

Returns null since this implementation does not encode SRP keys.

Specified by:

getFormat in interface java.security.Key

Returns:

null since this implementation does not encode SRP keys.

getN

public java.math.BigInteger getN()

Returns the public shared modulus.

Returns:

N.

getG

public java.math.BigInteger getG()

Returns the generator.

Returns:

g.

equals

public boolean equals(java.lang.Object obj)

Returns true if the designated object is an instance of SRPKey and has the same SRP parameter values as this one.

Parameters:

obj - the other non-null SRP key to compare to.

Returns:

true if the designated object is of the same type and value as this one.

getEncoded

public abstract byte[] getEncoded(int format)