The md5 authentication key ID. The value must be
(1 to 255). This field identifies the algorithm and secret
key used to create the message digest appended to the OSPF
packet. Key Identifiers are unique per-interface
(or equivalently, per-subnet).
The MD5 Authentication Key. If the Area's Authorization
Type is md5, and the key length is shorter than 16 octets,
the agent will left adjust and zero fill to 16 octets.
When read, snOspfIfMd5AuthKey always returns an Octet String
of length zero.