Re: [tor-bugs] #4591 [Tor Relay]: Don't set SSL_MODE_NO_AUTO_CHAIN during renegotiation.

["Tor Bug Tracker & Wiki" <torproject-admin@xxxxxxxxxxxxxx>]

#4591: Don't set SSL_MODE_NO_AUTO_CHAIN during renegotiation.
-----------------------------+----------------------------------------------
 Reporter:  asn              |          Owner:  nickm             
     Type:  defect           |         Status:  needs_review      
 Priority:  major            |      Milestone:  Tor: 0.2.3.x-final
Component:  Tor Relay        |        Version:                    
 Keywords:  tls correctness  |         Parent:                    
   Points:                   |   Actualpoints:                    
-----------------------------+----------------------------------------------

Comment(by asn):

 I tested this by connecting to a relay with OpenSSL `s_client`, requesting
 renegotiation and checking the length of the `Certificate` record. The
 certificate record on the first handshake is 600 bytes (or so) smaller
 than the certificate on the renegotiation handshake (since during
 renegotiation the bridge sends two certificates in the `Certificate`
 record). It seems to fix the bug.

 The patch looks OK too.

 The OpenSSL command I used is:
 {{{
 openssl s_client -cert ./example.pem -tls1 -msg -showcerts -connect
 localhost:6666
 }}}

-- 
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/4591#comment:4>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
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