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3.1.5.2.1 Verifying Responses with Sub-Authentication Packages

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The request to verify by a subauthentication package SHOULD<23> be indicated by the ParameterControl field of the LogonInformation parameter. The ParameterControl field, defined in [MS-NRPC] section 2.2.1.4.15, provides an extensibility point for software providers.

An example of subauthentication package usage occurs with remote access authentications using the CHAP ([RFC1994]) method. In such cases, response computation of a MD5 hash value ([RFC1994]) is used instead of NTOWF.

Using the NRPC generic pass-through ([MS-NRPC] section 3.2.4.1) can result in invoking a custom subauthentication package at the DC, per the indication of the ParameterControl field of the LogonInformation parameter. In this case, such a subauthentication package MUST serve as a custom response verification instead of using the method specified by section 3.3 of [MS-NLMP]. For more information about this subauthentication package, see [MSDN-0SUBAUTHROUTINE9].