[tor-bugs] #4549 [Tor Bridge]: Implement user-defined certificate strings through torrc (part of the proposal 179 efforts)

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#4549: Implement user-defined certificate strings through torrc (part of the
proposal 179 efforts)
------------------------+---------------------------------------------------
 Reporter:  asn         |          Owner:                    
     Type:  defect      |         Status:  needs_review      
 Priority:  normal      |      Milestone:  Tor: 0.2.3.x-final
Component:  Tor Bridge  |        Version:                    
 Keywords:              |         Parent:  #3972             
   Points:              |   Actualpoints:                    
------------------------+---------------------------------------------------

Comment(by asn):

 Nick, do you have any tips on testing the v2 handshake?

 I'm trying to peak into the v2 handshake by using s_client(1SSL) and
 renegotiating, but I can't seem to be able to trigger the server sending
 me his certificate chain. I always get a single certificate out of the
 server during the renegotiation, and no certificate request.

 My `s_client` command is:
 `openssl s_client -cert ./le_cert.pem -cipher ECDHE-ECDSA-AES256-SHA
 :ECDHE-RSA-AES256-SHA:DHE-RSA-AES256-SHA:DHE-DSS-AES256-SHA:ECDH-RSA-
 AES256-SHA:ECDH-ECDSA-AES256-SHA:AES256-SHA:ECDHE-ECDSA-RC4-SHA:ECDHE-
 ECDSA-AES128-SHA:ECDHE-RSA-RC4-SHA:ECDHE-RSA-AES128-SHA:DHE-RSA-AES128-SHA
 :DHE-DSS-AES128-SHA:ECDH-RSA-RC4-SHA:ECDH-RSA-AES128-SHA:ECDH-ECDSA-
 RC4-SHA:ECDH-ECDSA-AES128-SHA:RC4-MD5:RC4-SHA:AES128-SHA:ECDHE-ECDSA-DES-
 CBC3-SHA:ECDHE-RSA-DES-CBC3-SHA:EDH-RSA-DES-CBC3-SHA:EDH-DSS-DES-CBC3-SHA
 :ECDH-RSA-DES-CBC3-SHA:ECDH-ECDSA-DES-CBC3-SHA:DES-CBC3-SHA -msg
 -showcerts -connect localhost:6666`

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/4549#comment:11>
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