Class MD2

public MD2()

Creates a new MD2 digest ready for use.

public Object clone()

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).

If the Object you call clone() on does not implement 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());
     }
 }
 

Specified by:

clone in interface IMessageDigest

Overrides:

clone in interface BaseHash

Returns:

a copy of the Object

See Also:

Cloneable

protected byte[] getResult()

Overrides:

getResult in interface BaseHash

protected byte[] padBuffer()

Generates an array of padding bytes. The padding is defined as i bytes of value i, where i is the number of bytes to fill the last block of the message to BLOCK_LENGTH bytes (or BLOCK_LENGTH bytes when the last block was completely full).

Overrides:

padBuffer in interface BaseHash

Returns:

the bytes to pad the remaining bytes in the buffer before completing a hash operation.

protected void resetContext()

Overrides:

resetContext in interface BaseHash

public boolean selfTest()

Specified by:

selfTest in interface IMessageDigest

Overrides:

selfTest in interface BaseHash

protected void transform(byte[] in,
                         int off)

Adds BLOCK_LENGTH bytes to the running digest.

Overrides:

transform in interface BaseHash

Parameters:

in - the byte array to take the BLOCK_LENGTH bytes from.

off - the offset to start from in the given byte array.