Used for padding (i.e. in HMacs)
close the digest, producing the final digest value. The doFinal call leaves the digest reset.
* close the digest, producing the final digest value. The doFinal * call leaves the digest reset.
Return the size in bytes of the internal buffer the digest applies it's compression function to.
return the size, in bytes, of the digest produced by this message digest.
update the message digest with a block of bytes.
reset the digest back to it's initial state.