public byte [ ] getKey ( ) { if ( result == null ) { return null ; } if ( result . getKeyData ( ) . size ( ) < KEY_LENGTH ) { throw new IllegalStateException ( "Could not get enough key data from the handshake." ) ; } byte [ ] key = new byte [ KEY_LENGTH ] ; result . getKeyData ( ) . copyTo ( key , 0 , 0 , KEY_LENGTH ) ; return key ; }
Returns the resulting key of the handshake if the handshake is completed . Note that the key data returned from the handshake may be more than the key length required for the record protocol thus we need to truncate to the right size .