> On 7 Feb 2017, at 21:33, Michael Rogers <michael@xxxxxxxxxxxxxxxx> wrote: > > On 05/02/17 07:44, Taylor R Campbell wrote: >>> Date: Sat, 04 Feb 2017 20:14:00 -0600 >>> From: Vi Grey <vigrey@xxxxxxxxxx> >>> Also, should we consider including a Version option eventually in the >>> ADD_ONION control port command when using a KeyBlob? It wouldn't matter >>> much for this new version and probably wouldn't matter much for a while, >>> but it might be good to keep this in mind for the future. >> >> Versioning onion addresses and versioning network-internal service >> descriptors need not be done the same way. >> >> Addresses are likely to be long-term, and should really change only if >> the meaning of the encoded public key has changed incompatibly but >> otherwise imperceptibly -- e.g., if for some reason Tor switched from >> Edwards coordinates to Montgomery coordinates on Curve25519. (That >> would be a silly thing to do -- it is just an example of a change that >> could still interpret existing addresses, but differently.) > > It seems to me that different people in this thread have different ideas > about what the version number in the onion address represents, and it > would be good to make that explicit in the spec. Does it represent: > > 1. The version of the *onion address format* - meaning that, for > example, a v4 address and a v5 address could point to the same > descriptor, which would be compatible with both addresses? > > 2. The version of the *descriptor format* - meaning that a v4 address > must point to a v4 descriptor, but a v4 descriptor and a v5 descriptor > could point to the same hidden service, which would be compatible with > both descriptors? > > 3. The version of the *entire protocol* - meaning that a v4 address must > point to a v4 descriptor, which must point to a v4 hidden service? At the moment, all 3 will change between versions 2 and 3. In future, it depends. It also depends how you define "the same hidden service", as many hidden services can front for the same backend service. Tim T -- Tim Wilson-Brown (teor) teor2345 at gmail dot com PGP C855 6CED 5D90 A0C5 29F6 4D43 450C BA7F 968F 094B ricochet:ekmygaiu4rzgsk6n xmpp: teor at torproject dot org ------------------------------------------------------------------------
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