I looked around and couldn’t find a pure-ruby implementation of Diffie-Hellman key exchange. Diffie-Hellman key exchange is a nifty way to end up with the same shared secret between Alice and Bob without ever sending the secret key to the other side. It’s used in ISAKMP, SSH and a host of other crypto-based protocols. The code for Diffie-Hellman in Ruby is unbelievably terse to the point you wonder if you actually got it working right. Two things come in handy: Ruby has open classes that you can extend and Ruby has built-in Bignum support. Integers don’t overflow in Ruby, they just keep expanding.
Archive for May 2007
Wireshark patch for MMS support
We have created a patch for Wireshark that allows it to dissect MMS (Manufacturing Messaging Specification) PDUs when transported over COTP/TPKT. Previously, Wireshark only dissected the protocol when the OSI session and presentation layers were present. This patch adds COTP as a heuristic dissector for MMS. Be sure to enable ‘try heuristics sub-dissectors first’ in the TCP options as well as fragmentation assembly for TPKT and COTP.
USAGE:
The patch was submitted to Wireshark and was added to trunk (with some small changes made by the wireshark team). You can either download the latest development release from Wireshark(recommended) or download the latest stable release and apply the patch.
download mms_patch.txt
