Returns a clone if the implementation is cloneable.

return	a clone if the implementation is cloneable.
Throws	CloneNotSupportedException: if this is called on an implementation that does not support Cloneable.

Completes the hash computation by performing final operations such as padding. Once engineDigest has been called, the engine should be reset (see engineReset). Resetting is the responsibility of the engine implementor.

return

the array of bytes for the resulting hash value.

Completes the hash computation by performing final operations such as padding. Once engineDigest has been called, the engine should be reset (see engineReset). Resetting is the responsibility of the engine implementor. This method should be abstract, but we leave it concrete for binary compatibility. Knowledgeable providers should override this method.

buf	the output buffer in which to store the digest
offset	offset to start from in the output buffer
len	number of bytes within buf allotted for the digest. Both this default implementation and the SUN provider do not return partial digests. The presence of this parameter is solely for consistency in our API's. If the value of this parameter is less than the actual digest length, the method will throw a DigestException. This parameter is ignored if its value is greater than or equal to the actual digest length.
return	the length of the digest stored in the output buffer.
Throws	DigestException: if an error occurs.
since	1.2

Returns the digest length in bytes.

This concrete method has been added to this previously-defined abstract class. (For backwards compatibility, it cannot be abstract.)

The default behavior is to return 0.

This method may be overridden by a provider to return the digest length.

return	the digest length in bytes.
since	1.2

Updates the digest using the specified byte.

input

the byte to use for the update.

Updates the digest using the specified array of bytes, starting at the specified offset.

input	the array of bytes to use for the update.
offset	the offset to start from in the array of bytes.
len	the number of bytes to use, starting at offset.

Update the digest using the specified ByteBuffer. The digest is updated using the input.remaining() bytes starting at input.position(). Upon return, the buffer's position will be equal to its limit; its limit will not have changed.

input	the ByteBuffer
since	1.5