Re: [STDS-802-11-TGM] TGmc CID 13 - Proposed resolution
--- This message came from the IEEE 802.11 Task Group M Technical Reflector ---
Well, what *is* being distributed? Is it really the GTK, or is it just
the TK?
Mark
--
Mark RISON, Systems Architect, Wi-Fi English/Esperanto/Français
Samsung Cambridge Solution Centre Tel: +44 1223 434600
Innovation Park, Cambridge CB4 0ZT
ROYAUME UNI WWW: http://www.samsung.com/uk
> -----Original Message-----
> From: Hamilton, Mark [mailto:Mark.Hamilton@xxxxxxxxxxxxxxx]
> Sent: 14 December 2012 16:45
> To: m.rison@xxxxxxxxxxx; STDS-802-11-TGM@xxxxxxxxxxxxxxxxx
> Subject: RE: [STDS-802-11-TGM] TGmc CID 13 - Proposed resolution
>
> Would it be easier to just label the Key field (in the Figures) as “variable”? Then, the text can say
> what goes in the field (“the GTK being distributed” as Dorothy suggested for the GTK subelement and
> the text we have about the IGTK for the IGTK subelement), and that should unambiguously describe what
> the length(s) can be, and we don’t have a nightmare getting this right and maintaining it correctly.
>
>
>
> As for the Length field, Mark, I think our discussion on CID 137 (and CID 5) should make these bits of
> text go away. At least in my opinion, there are no “extra semantics” that are useful to discuss for
> these subelements’ Length.
>
>
>
> Mark
>
>
>
> From: ***** IEEE stds-802-11-tgm List ***** [mailto:STDS-802-11-TGM@xxxxxxxx] On Behalf Of Mark Rison
> Sent: Friday, December 14, 2012 4:47 AM
> To: STDS-802-11-TGM@xxxxxxxxxxxxxxxxx
> Subject: Re: [STDS-802-11-TGM] TGmc CID 13 - Proposed resolution
>
>
>
> --- This message came from the IEEE 802.11 Task Group M Technical Reflector ---
>
> I must admit I'm mildly confused:
>
>
>
> 1) 11.6.1.4 Group key hierarchy says that the size of the GTK is
>
> 256 + TK_bits, where TK_bits is in Table 11-4
>
>
>
> 2) So the size of the GTK is 32+5 octets for WEP-40, 32+13 octets
>
> for WEP-104, 32+32 octets for TKIP and 32+16 octets for CCMP/BIP,
>
> right?
>
>
>
> 3) So if the thing being distributed is the GTK (rather than the TK,
>
> which does have a size of TK_bits, as the name suggests):
>
>
>
> a) In F8-489, the Key subfield should have a size of 32+5, 32+13,
>
> 32+16 or 32+32 octets
>
>
>
> b) The value of the Length field below should be 11+32+5, 11+32+13,
>
> 11+32+16 or 11+32+32 (except that I hope/think we've managed to agree
>
> to delete such sentences)
>
>
>
> 4) Similarly in F8-490, the Key subfield should have a size of
>
> 32+16 and the Length value should be 8+32+16
>
>
>
> No?
>
>
>
> Mark
>
>
>
> --
>
> Mark RISON, Systems Architect, Wi-Fi English/Esperanto/Français
>
> Samsung Cambridge Solution Centre Tel: +44 1223 434600
>
> Innovation Park, Cambridge CB4 0ZT
>
> ROYAUME UNI WWW: http://www.samsung.com/uk
>
>
>
> From: ***** IEEE stds-802-11-tgm List ***** [mailto:STDS-802-11-TGM@xxxxxxxx] On Behalf Of Dorothy
> Stanley
> Sent: 13 December 2012 18:16
> To: STDS-802-11-TGM@xxxxxxxxxxxxxxxxx
> Subject: [STDS-802-11-TGM] TGmc CID 13 - Proposed resolution
>
>
>
> --- This message came from the IEEE 802.11 Task Group M Technical Reflector --- Per my Dec 7 telecon
> action item, the proposed resolution for CID 13 (below) is:
>
> Revised:
> Below figure 8-489, Insert the following paragraph sentence immediately following the paragraph
> describing the RSC field and
> Before the paragraph beginning “NOTE—The RSC field value for TKIP”:
>
> “The Key field is the GTK being distributed.”
>
> Also, it has been noted that the Figure 8-489 Length description
> field is missing the CCMP key case (16 octet key; only 5 octet and 32 are shown).
>
> Change the Length field description sentence as shown below:
>
> The value of the Length field is 16, 27 or 43.
>
> Thanks,
>
> Dorothy
> ------------------
>
> 13
>
> 790.30
>
> 8.5.14.19
>
> (For Diane Lacey, 802.11-2012 publication editor)
> Ed writes: 'Figure 8-489 re Key field: Do we want to add paragraph about this field after paragraph
> for RSC field? (see discussion after Figure 8-490 for IGTK subelement)'
>
> Add para defining contents of Key Field for WNM-Sleep Mode GTK subelement
>
>
>
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