i have a question about computing MD5 hash in RIPv2 authenticated packet. I am implementing RIPv2 software router and I need to find combination of input data to compute MD5 hash wich has to be checked when packet is recieved or appended when packet is send as update to another Cisco router.
I know that hash is computed minimum from key ID, sequence number, password and some things that I am looking for. Any advices greatly appreciated.
I found the solution. It was my mistake that I deleted the FFFF0001 and authentication data and replaced with password padded to 16 bytes. The FFFF0001 have to stay, only authentication data have to be replaced by padded password.