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From Benno Evers <>
Subject Review Request 70732: Disallow verification of empty TLS server certificates.
Date Tue, 28 May 2019 13:49:47 GMT

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Review request for mesos, Alexander Rukletsov, Jan-Philip Gehrcke, and Till Toenshoff.

Repository: mesos


When in SSL client mode and `LIBPROCESS_SSL_VERIFY_CERT=true` has
been set, enforce that the server actually presents a certificate
that can be verified.

Note that in most cases, the TLS stack would rejected the connection
before the code ever reaches `openssl::verify()`, since the TLS
specification that a server MUST always send a certificate unless
an anonymous cipher is used.


  3rdparty/libprocess/src/openssl.cpp e7dbd67913fa8e7fbbf60dee428e7e38895f86ce 
  3rdparty/libprocess/src/tests/ssl_tests.cpp 6b8496aeeed79ae1bd39d7013f4f403b248fdd4c 



Internal CI run. (Failed on platforms using Openssl < 1.1.1)

Some manual tests using wireshark to verify that the second paragraph in the description is
true, i.e. that the TLS stack actually rejects connections that don't present a certificate.


Benno Evers

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