| Hello guys, this is some thougts and result of my investigation into skype protocol and how it is worked. First of all, what we need to reconstruct network protocol? We need plain text data which transfered from host A to host B, right? Right. So, there it is. There is a text files with plain text data which sended from one skype client to another skype client. Yes, it have much crypto on lower levels. For now, just dont think about it. It was researched one time and after we just encapsulate it in function or class and dont care about it. Text files of skype send message sequence: http://dev.epycslib.ru/dumps/parse_proto.zip Okay, we got plain text data transfered. What we need next? We need understand, that all this data means. Where is destination username, where is time and where is message. And how protocol care it all for working good. How to do this? Best way, its rewrite it on paper in your own blocks and visual representation to understand internal structure of protocol. Make visual blocks and etc. Like in UML. So, there it is. My scans of hand written paper with skype protocol send message sequences: http://dev.epycslib.ru/dumps/skypeproto.zip More info at: http://skype-open-source2.blogspot.ru/2016/06/skype-protocol... |