javax.crypto.spec
Class RC2ParameterSpec

java.lang.Object
  extended by javax.crypto.spec.RC2ParameterSpec
All Implemented Interfaces:
AlgorithmParameterSpec

public class RC2ParameterSpec
extends Object
implements AlgorithmParameterSpec

A wrapper for parameters for the RC2 block cipher ("RC" means either "Rivest Cipher" or "Ron's Code", depending upon who you ask and when).

Since:
1.4

Constructor Summary
RC2ParameterSpec(int effectiveKeyBits)
          Create RC2 parameters without an IV.
RC2ParameterSpec(int effectiveKeyBits, byte[] iv)
          Create RC2 parameters with an IV.
RC2ParameterSpec(int effectiveKeyBits, byte[] iv, int offset)
          Create RC2 parameters with an IV.
 
Method Summary
 boolean equals(Object o)
          Determine whether this Object is semantically equal to another Object.
 int getEffectiveKeyBits()
          Get the number of effective key bits.
 byte[] getIV()
          Return the initialization vector, or null if none was specified.
 int hashCode()
          Get a value that represents this Object, as uniquely as possible within the confines of an int.
 
Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

RC2ParameterSpec

public RC2ParameterSpec(int effectiveKeyBits)
Create RC2 parameters without an IV.

Parameters:
effectiveKeyBits - The number of effective key bits.

RC2ParameterSpec

public RC2ParameterSpec(int effectiveKeyBits,
                        byte[] iv)
Create RC2 parameters with an IV.

Parameters:
effectiveKeyBits - The number of effective key bits.
iv - The IV; the first eight bytes of this array are used.

RC2ParameterSpec

public RC2ParameterSpec(int effectiveKeyBits,
                        byte[] iv,
                        int offset)
Create RC2 parameters with an IV.

Parameters:
effectiveKeyBits - The number of effective key bits.
iv - The IV; the first eight bytes of this array after offset are used.
offset - From whence to start in the array.
Method Detail

getEffectiveKeyBits

public int getEffectiveKeyBits()
Get the number of effective key bits.

Returns:
The numer of effective key bits.

getIV

public byte[] getIV()
Return the initialization vector, or null if none was specified.

Returns:
The IV, or null.

equals

public boolean equals(Object o)
Description copied from class: Object
Determine whether this Object is semantically equal to another Object.

There are some fairly strict requirements on this method which subclasses must follow:

This is typically overridden to throw a ClassCastException if the argument is not comparable to the class performing the comparison, but that is not a requirement. It is legal for a.equals(b) to be true even though a.getClass() != b.getClass(). Also, it is typical to never cause a NullPointerException.

In general, the Collections API (java.util) use the equals method rather than the == operator to compare objects. However, IdentityHashMap is an exception to this rule, for its own good reasons.

The default implementation returns this == o.

Overrides:
equals in class Object
Parameters:
o - the Object to compare to
Returns:
whether this Object is semantically equal to another
See Also:
Object.hashCode()

hashCode

public int hashCode()
Description copied from class: Object
Get a value that represents this Object, as uniquely as possible within the confines of an int.

There are some requirements on this method which subclasses must follow:

Notice that since hashCode is used in Hashtable and other hashing classes, a poor implementation will degrade the performance of hashing (so don't blindly implement it as returning a constant!). Also, if calculating the hash is time-consuming, a class may consider caching the results.

The default implementation returns System.identityHashCode(this)

Overrides:
hashCode in class Object
Returns:
the hash code for this Object
See Also:
Object.equals(Object), System.identityHashCode(Object)