[tor-bugs] #2768 [Metrics]: Write standalone directory document signature verification tools

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#2768: Write standalone directory document signature verification tools
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 Reporter:  rransom      |          Owner:  rransom
     Type:  enhancement  |         Status:  new    
 Priority:  major        |      Milestone:         
Component:  Metrics      |        Version:         
 Keywords:               |         Parent:         
   Points:               |   Actualpoints:         
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 Right now, the only easy way for researchers to verify that they are using
 the actual Tor network consensuses/votes/descriptors is to verify
 Karsten's OpenPGP signature of the tarball (if there is one).  Tor already
 contains code to verify those documents which have signatures; we should
 expose that code to researchers' scripts, too.

 The extra-info descriptors and microdescriptors are authenticated by
 having their hashes published in other documents, rather than being signed
 directly, so they will be a bit trickier for simple tools to verify; we
 should postpone writing verification tools for those documents for now.

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Ticket URL: <https://trac.torproject.org:443/projects/tor/ticket/2768>
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