Per RFC 3112:
DESC 'authentication password exact matching rule'
SYNTAX 18.104.22.168.4.1.422.214.171.124 )
This matching rule allows a client to assert that an asserted
authPasswordSyntax value matches authPasswordSyntax values. It is
meant to be used as the EQUALITY matching rule of attributes whose
SYNTAX is authPasswordSyntax.
The assertion is "TRUE" if there is an attribute value which
has the same scheme, authInfo, and authValue components as the
asserted value; "FALSE" if no attribute value has the same
components as the asserted value; and "Undefined" otherwise.