Protocols/OSCAR/SNAC/BUCP CHALLENGE REQUEST

OSCAR Protocol

Introduction • Terms • Clients

Basic

Datatypes • FLAP • SNAC • TLV

UUIDs • Errors • Tool IDs

Host Interaction

Rate Limits • Migration • Messages

Other Services

ADMIN • ADVERT • ALERT

BART • BOS • BUCP • CHAT

CHAT_NAV

Tutorials

Sign On • BART • Rendezvous

ICBM • Locate • Buddies

Foodgroups

OSERVICE (0x0001)

LOCATE (0x0002)

BUDDY (0x0003)

ICBM (0x0004)

ADVERT (0x0005)

INVITE (0x0006)

ADMIN (0x0007)

POPUP (0x0008)

PD (0x0009)

USER_LOOKUP (0x000A)

STATS (0x000B)

TRANSLATE (0x000C)

CHAT_NAV (0x000D)

CHAT (0x000E)

ODIR (0x000F)

BART (0x0010)

FEEDBAG (0x0013)

ICQ (0x0015)

BUCP (0x0017)

ALERT (0x0018)

PLUGIN (0x0022)

UNNAMED_FG_24 (0x0024)

MDIR (0x0025)

ARS (0x044A)

ID	Origin	Name	Foodgroup	Service	Status	Version
0x0017, 0x0006	Client	BUCP__CHALLENGE_REQUEST	Unspecified	BUCP	Active	1.15

Request challenge for login request.

SNAC Header

Foodgroup	uint16 (word)	00 17
Subgroup	uint16 (word)	00 06
Flags	uint16 (word)	00 00
Request ID	uint32 (dword)	00 00 00 00

SNAC Data

Unconfirmed: This SNAC contains no data

From Aleksandr Shutko: SNAC(17,06) BUCP__CHALLENGE_REQUEST

This is the first snac in md5 crypted login sequence. Client use this snac to request login random key from server. It contain screenname and some unknown stuff. Server should reply with SNAC(17,07), containing auth key string.  00 17   word   SNAC family  00 06   word   SNAC subtype  00 00   word   SNAC flags  xx xx xx xx   dword   SNAC request-id  00 01   word   TLV.Type(0x01) - screen name  xx xx   word   TLV.Length  xx ..   string   Screen name  00 4B   word   TLV.Type(0x4B) - unknown (empty)  00 00   word   TLV.Length  00 5A   word   TLV.Type(0x5A) - unknown (empty)  00 00   word   TLV.Length  May contain other tlv from the following list

Example SNAC dump with flap header:

2A 02 0A 46 00 1D 00 17 00 06 00 00 00 00 00 00 *..F............ 00 01 00 07 36 32 31 38 38 39 35 00 4B 00 00 00 ....6218895.K... 5A 00 00 Z..

BUCP SNACs

SNAC List

Subgroup Origin Name 0x0001 Any BUCP__ERR This is the error SNAC for the BUCP foodgroup. 0x0002 Client BUCP__LOGIN_REQUEST Client login request. 0x0003 Host BUCP__LOGIN_RESPONSE Host login response, will contain reconnect information with login cookie or an error code and/or URL. 0x0004 Client BUCP__REGISTER_REQUEST Client registration for legacy ICQ clients. 0x0005 Host BUCP__REGISTER_RESPONSE Host response to BUCP__REGISTER_REQUEST. May contain confirmation of registration or an error code and/or URL. 0x0006 Client BUCP__CHALLENGE_REQUEST Request challenge for login request. 0x0007 Host BUCP__CHALLENGE_RESPONSE Response to BUCP__CHALLENGE_REQUEST with challenge. 0x0008 Client BUCP__ASASN_REQUEST AOL Suggest A Screenname Request, suggests screennames based on other parameters. 0x0009 Host BUCP__ASASN_RESPONSE Response to BUCP__ASASN_REQUEST with a list of suggestions 0x000A Host BUCP__SECURID_REQUEST Host SecurID request for client to continue logging in. 0x000B Client BUCP__SECURID_RESPONSE Client response to BUCP__SECURID_RESPONSE with SecurID code. 0x000C Client BUCP__REGISTRATION_IMAGE_REQUEST Request registration image, or CAPTCHA 0x000D Host BUCP__REGISTRATION_IMAGE_REPLY Response to BUCP__REGISTRATION_IMAGE_REQUEST containing image information