wfOspfVirtIfAuthKey 1.3.6.1.4.1.18.3.5.3.2.3.6.1.10

'If Authentication Type is simplePassword, the device will left adjust and zero fill to 8 octets. When read, ospfVifAuthKey always returns a string of length zero.' REFERENCE 'OSPF Version 2, Section 9 The Interface Data Structure'