Protocols/OSCAR/SNAC/BUCP CHALLENGE RESPONSE

OSCAR Protocol

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Foodgroups

OSERVICE (0x0001)

BUCP (0x0017)

This is the first SNAC sent by the server in response to BUCP__CHALLENGE_REQUEST. After this is sent, the client should store the challenge given here, and use it for hashing the password in BUCP__LOGIN_REQUEST.

00 17   word   SNAC foodgroup  00 07   word   SNAC subgroup  00 00   word   SNAC flags  xx xx xx xx   dword   SNAC request ID  xx xx   word   Challenge length  xx ..   string   Challenge

Example dump (from NINA's servers - dump contains a FLAP header):

0000   2a 02 00 01 00 16 00 17 00 07 00 00 00 00 00 00   *...............
0010   00 0a 36 30 30 35 38 35 35 39 34 36               ..6005855946

Note for server developers: I'm not quite sure if there is anything fancy going on in the challenge generation in NINA, but judging by the packet dumps alone, I simply just made a string with 10 random numbers, as seen in my server