Protocols/OSCAR/SNAC/BUCP CHALLENGE REQUEST

OSCAR Protocol

Introduction • Terms • Clients

Basic

TODO

Tutorials

Sign On

Foodgroups

OSERVICE (0x0001)

BUCP (0x0017)

This is the first SNAC sent by the client when authorizing via BUCP and is, obviously, used for requesting a challenge. The server should reply with BUCP__CHALLENGE_RESPONSE containing the aforementioned challenge, which will be used for hashing the password later on.

SNAC Header

00 17   word   SNAC foodgroup  00 06   word   SNAC subgroup  00 00   word   SNAC flags  00 00 00 00   dword   SNAC request ID SNAC Data The SNAC data is a list of TLVs - the possible TLVs being as follows: Type Length Value 00 01 xx xx The screen name as given by the client May also contain other common TLVs. SNAC Dump Example dump (sent by a AIM 4.8.2540 client - dump contains a FLAP header): 0000 2a 02 17 8a 00 18 00 17 00 06 00 00 00 00 00 00 *............... 0010 00 01 00 0a 74 6f 78 69 64 61 74 69 6f 6e ....toxidation