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codereview.settings

Tom Anderson 9f5be07962 Move Linux documents to a subdir

There were 32 linux documents in docs. It's getting out of hand, so lets
move them to a subdirectory.

R=sky,jorgelo
CC=thestig
BUG=None

Change-Id: Ib7de415c72fe6ec3c51dc2b28f06b34487b5b6d1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1974901
Commit-Queue: Thomas Anderson <thomasanderson@chromium.org>
Reviewed-by: Scott Violet <sky@chromium.org>
Reviewed-by: Jorge Lucangeli Obes <jorgelo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#726499}

2019-12-19 20:54:32 +00:00

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Debugging SSL on Linux

To help anyone looking at the SSL code, here are a few tips I've found handy.

[TOC]

Logging

There are several flavors of logging you can turn on.

SSLClientSocketImpl can log its state transitions and function calls using base/logging.cc. To enable this, edit net/socket/ssl_client_socket_impl.cc and change #if 1 to #if 0. See base/logging.cc for where the output goes (on Linux, usually stderr).
HttpNetworkTransaction and friends can log its state transitions using base/trace_event.cc. To enable this, arrange for your app to call base::TraceLog::StartTracing(). The output goes to a file named trace...pid.log in the same directory as the executable (e.g. Hammer/trace_15323.log).

Network Traces

http://wiki.wireshark.org/SSL describes how to decode SSL traffic. Chromium SSL unit tests that use net/base/ssl_test_util.cc to set up their servers always use port 9443 with net/data/ssl/certificates/ok_cert.pem, and port 9666 with net/data/ssl/certificates/expired_cert.pem This makes it easy to configure Wireshark to decode the traffic: do

Edit / Preferences / Protocols / SSL, and in the "RSA Keys List" box, enter

127.0.0.1,9443,http,<path to ok_cert.pem>;127.0.0.1,9666,http,<path to expired_cert.pem>

e.g.

127.0.0.1,9443,http,/home/dank/chromium/src/net/data/ssl/certificates/ok_cert.pem;127.0.0.1,9666,http,/home/dank/chromium/src/net/data/ssl/certificates/expired_cert.pem

Then capture all tcp traffic on interface lo, and run your test.

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Debugging SSL on Linux

Logging

Network Traces

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