RADIUS attribute from rfc5090

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Digest-Nextnonce

This attribute holds a nonce to be used in the HTTP Digest
   calculation.

   
         The RADIUS server MAY put a Digest-Nextnonce Attribute into an
         Access-Accept packet.  If this attribute is present, the RADIUS
         client MUST put the contents of this attribute into the
         nextnonce directive of an Authentication-Info header in its
         HTTP-style response.  This attribute MUST only be used in
         Access-Accept packets.
   Type
         107 for Digest-Nextnonce
   Length
         >= 3
   Text
         It is recommended that this text be base64 or hexadecimal data.

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