[tor-bugs] #29260 [Circumvention/Snowflake]: Should Snowflake proxies have a way to identify themselves to the broker

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#29260: Should Snowflake proxies have a way to identify themselves to the broker
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 Reporter:  ahf                                  |          Owner:  ahf
     Type:  task                                 |         Status:  new
 Priority:  Medium                               |      Milestone:  Tor:
                                                 |  unspecified
Component:  Circumvention/Snowflake              |        Version:  Tor:
                                                 |  unspecified
 Severity:  Normal                               |     Resolution:
 Keywords:  ex-sponsor-19, anti-censorship-      |  Actual Points:  6
  roadmap                                        |
Parent ID:  #29207                               |         Points:  1
 Reviewer:                                       |        Sponsor:
                                                 |  Sponsor28-must
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Changes (by ahf):

 * status:  assigned => new
 * actualpoints:   => 6


Comment:

 During the anti-censorship team meeting today we decided to skip doing
 this. The amount of complexity added to the Snowflake codebase is too
 great for this feature for now. Maybe we want to redo it in the future.

 The patch to do this via WebSocket can be seen at
 https://github.com/ahf/snowflake/commit/4ca9e0acd7d711fbe2568b6375cd6b57a2c1f965

 It uses the NIST P-256 Curve for public key authentication, which is
 chosen over for example Ed25519 because it's currently (as of 2019)
 available in the WebCrypto API available in most modern browsers.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/29260#comment:9>
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