[tor-bugs] #20893 [Core Tor/Tor]: Add a fuzzing harness for the Tor directory protocol

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#20893: Add a fuzzing harness for the Tor directory protocol
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 Reporter:  teor          |          Owner:  nickm
     Type:  enhancement   |         Status:  needs_revision
 Priority:  Medium        |      Milestone:  Tor: 0.3.0.x-final
Component:  Core Tor/Tor  |        Version:
 Severity:  Normal        |     Resolution:
 Keywords:  fuzz          |  Actual Points:
Parent ID:                |         Points:  2
 Reviewer:                |        Sponsor:
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Comment (by teor):

 Also see a few extra commits on my `fuzz-dir-extras` branch.
 We might want to keep the test cases separate, as the directory entry
 point expects HTTP headers.

 Let me know when you think the branch is ready for testing, and I will
 deploy it on a 20 core machine I have access to.

 (It would be nice to have a valid HTTP request for each descriptor GET and
 POST, and then we could strip out the descriptor content for the
 descriptor entry point. I'm thinking relay, bridge, HSDir, etc. Perhaps
 adding debug logging then running one of the comprehensive chutney
 networks would be the way to go here.)

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/20893#comment:7>
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