First, I agree that this is a nit.

On 25.01.23 14:54, Alan DeKok wrote:
On Jan 25, 2023, at 8:27 AM, Eliot Lear <l...@lear.ch> wrote:
No negotiation required.  It gets the username as part of basic auth, sees the 
name and then makes a decision to initiate a new inner method.
   It has to finish the current method first.  i.e. the server only gets the username 
after sending a Basic-Password-Auth-Req TLV.  The response contains a username 
&& password.

Sure, but 7170 doesn't say you can't have a null password.  So it can finish the current method and then decide to add another by sending a request-action TLV (a corner case to be sure).  Or it can reject the null password.

We could also say, “don't try that or we'll send the protocol police after you” ;-)

Eliot

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