[tor-bugs] #22961 [Core Tor/Tor]: Should tor-spec say that nodes MUST NOT use TLS compression?

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#22961: Should tor-spec say that nodes MUST NOT use TLS compression?
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 Reporter:  teor               |          Owner:
     Type:  defect             |         Status:  new
 Priority:  Medium             |      Milestone:  Tor: 0.3.2.x-final
Component:  Core Tor/Tor       |        Version:
 Severity:  Normal             |     Resolution:
 Keywords:  tor-spec security  |  Actual Points:
Parent ID:  #18856             |         Points:
 Reviewer:                     |        Sponsor:
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Comment (by yawning):

 Yes, because that's what the code does:
 {{{
 #ifdef SSL_OP_NO_COMPRESSION
   SSL_CTX_set_options(result->ctx, SSL_OP_NO_COMPRESSION);
 #endif
 #if OPENSSL_VERSION_NUMBER < OPENSSL_V_SERIES(1,1,0)
 #ifndef OPENSSL_NO_COMP
   /* Don't actually allow compression; it uses ram and time, but the data
    * we transmit is all encrypted anyway. */
   if (result->ctx->comp_methods)
     result->ctx->comp_methods = NULL;
 #endif
 #endif
 }}}

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/22961#comment:1>
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