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gnu.javax.crypto.sasl.srp
Class IALG  view IALG download IALG.java

java.lang.Object
  extended bygnu.javax.crypto.sasl.srp.IALG
All Implemented Interfaces:
java.lang.Cloneable

public final class IALG
extends java.lang.Object
implements java.lang.Cloneable

A Factory class that returns IALG (Integrity Algorithm) instances that operate as described in the draft-burdis-cat-sasl-srp-04 and later.


Field Summary
private  gnu.javax.crypto.mac.IMac hmac
           
 
Constructor Summary
private IALG(gnu.javax.crypto.mac.IMac hmac)
          Private constructor to enforce instantiation through Factory method.
 
Method Summary
 java.lang.Object clone()
          This method may be called to create a new copy of the Object.
 byte[] doFinal()
           
(package private) static IALG getInstance(java.lang.String algorithm)
          Returns an instance of a SASL-SRP IALG implementation.
 void init(KDF kdf)
           
 int length()
          Returns the length (in bytes) of this SASL SRP Integrity Algorithm.
 void update(byte[] data)
           
 void update(byte[] data, int offset, int length)
           
 
Methods inherited from class java.lang.Object
equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

hmac

private gnu.javax.crypto.mac.IMac hmac
Constructor Detail

IALG

private IALG(gnu.javax.crypto.mac.IMac hmac)
Private constructor to enforce instantiation through Factory method.

Method Detail

getInstance

static IALG getInstance(java.lang.String algorithm)
                 throws javax.security.sasl.SaslException

Returns an instance of a SASL-SRP IALG implementation.


clone

public java.lang.Object clone()
                       throws java.lang.CloneNotSupportedException
Description copied from class: java.lang.Object
This method may be called to create a new copy of the Object. The typical behavior is as follows:
  • o == o.clone() is false
  • o.getClass() == o.clone().getClass() is true
  • o.equals(o) is true

However, these are not strict requirements, and may be violated if necessary. Of the three requirements, the last is the most commonly violated, particularly if the subclass does not override Object.equals(Object)>Object.equals(Object) 55 .

If the Object you call clone() on does not implement java.lang.Cloneable (which is a placeholder interface), then a CloneNotSupportedException is thrown. Notice that Object does not implement Cloneable; this method exists as a convenience for subclasses that do.

Object's implementation of clone allocates space for the new Object using the correct class, without calling any constructors, and then fills in all of the new field values with the old field values. Thus, it is a shallow copy. However, subclasses are permitted to make a deep copy.

All array types implement Cloneable, and override this method as follows (it should never fail):

 public Object clone()
 {
   try
     {
       super.clone();
     }
   catch (CloneNotSupportedException e)
     {
       throw new InternalError(e.getMessage());
     }
 }
 


init

public void init(KDF kdf)
          throws javax.security.sasl.SaslException

update

public void update(byte[] data)

update

public void update(byte[] data,
                   int offset,
                   int length)

doFinal

public byte[] doFinal()

length

public int length()

Returns the length (in bytes) of this SASL SRP Integrity Algorithm.