nusenu: > > > Ivan Markin: >> On Tue, Feb 28, 2017 at 02:09:00AM +0000, nusenu wrote: >>>>> Is there a tool out there that tells me which HSDir is/will probably be >>>>> responsible for a given onion address (and at what time)? >>>> >>>> There's no tool, unless you can reverse SHA1. >>>> (Or brute-force a set of popular onion addresses.) >>> >>> I probably was not very clear in my question. I'm not aiming for the >>> reverse path, just the normal calculation a tor client does given an >>> onion address but instead of just calculating the current descriptor-id, >>> print descriptor-ids for the future N days for onion address M (for the >>> pre-prop224 world). >> >> FYI https://gist.github.com/nogoegst/895dde228496e04f409fc6d160a5de5a >> >> $ go run onion-desc-advance.go -time 1488288001 yrcfcqhja2ide7yh >> >> prints descriptor IDs for the given time for replica #1 and #2. > > Thanks for this. > > Shouldn't the first 2 or 3 hex digits of your output (after converting > them to hex) without time option and the actual intro point FPs match > when run at roughly the same time? > > example for duckduckgo: > > ./get-intro-points.py 3g2upl4pq6kufc4m [1] > 3g2upl4pq6kufc4m:56782537778BEFC5A48080B58BE01E814AF9B5D3 > 3g2upl4pq6kufc4m:769DBA4C0C992FCEA080618833FD7BF5AC1F4F41 > 3g2upl4pq6kufc4m:744B753C7F5E0C6BDD240EE5D879A36C650D2B00 > > > go run descriptor-id-calc.go 3g2upl4pq6kufc4m > replica #0: sv5uuknuqvjgquf4hu4m6tvcyuyiyvw7 > -> hex: 957B4A29B485526850BC3D38CF4EA2C5308C56DF > > replica #1: crpc4lkarusgflm5nblslpopg5qpvw7i > -> hex: 145E2E2D408D2462AD9D685725BDCF3760FADBE8 > > they start with 95.. and 14.. but the actual intro points start with > 56.., 76.. and 74.. ? I probably misunderstood how the design works. The introduction points are not chosen by calculating the descriptor-id and finding the 3 HSDirs next to it (by sorted fingerprint).
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