Wireshark-dev: [Wireshark-dev] Adding verification functionality to SIP dissector
From: Erik de Jong <[email protected]>
Date: Thu, 23 Feb 2017 20:56:31 +0100
During my day job I have noticed that sometimes combinations of certain platforms have trouble dealing with SIP digest authorization. Reasons for this range from bugs in the SIP stack to wrong escapes for special characters in configuration files generated for automated set provisioning. I have written a Lua script that will allow me to enter credentials and check if the digest hash in a SIP authorization line is indeed the correct hash for those credentials.
I've written a proof of concept where this functionality is added to the SIP dissector itself and I'm wondering whether this is appropriate to submit for review or that these kind of diagnostics are better left in an external script as it is not really a dissection of the packet.

So to clarify the purpose of the validation is twofold in my use cases:
1) Check SIP stack digest
2) Check config file builders are not escaping things like <> (in xml config files) or other special characters in a wrong way
In both cases the digest hash will not match but as it's a hash it's not possible to pinpoint the fault.