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[#600] Add TLS SNI hostname to client options #601

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Merged
glynos merged 1 commit into from
Feb 19, 2016
Merged

[#600] Add TLS SNI hostname to client options #601

glynos merged 1 commit into from
Feb 19, 2016

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@theopolis
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@theopolis theopolis commented Feb 16, 2016

This PR adds a new member and API to http::client::options for an optional TLS SNI hostname. HTTPS client option callsites may optionally support/provide an SNI hostname:

http::client::options options;
options.openssl_sni_hostname("my.shared.host");

http::client client(options);

The implementation within ssl_delegate and sync_ssl arrive at an OpenSSL (and equivalent API implementations): SSL_set_tlsext_host_name. See the OpenSSL wiki for TLS SNI details, as well as usage examples.

Also, there are various non-thesis related style changes pulled in via clang-format and the project's local format file. Please let me know if it is unacceptable to piggy-back these changes and I will try to remove them. Most of my editors auto-format so pulling out the changes is doable. 🙀 😉

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glynos commented Feb 16, 2016

@theopolis The CI builds are failing, could you update the PR? Also, could you apply this on the master branch? Unfortunately, master and 0.12-devel have diverged in the last few weeks, so it means some duplication of effort.

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theopolis commented Feb 16, 2016

I'm going to attempt some E2E testing of the SNI support today. I can also submit a PR against cpp-netlib:master, but I wasn't sure if that code was a candidate for a 0.12 release. It seems there's some significant divergence from the 0.11 build w.r.t ASIO and boost.

@theopolis theopolis mentioned this pull request Feb 16, 2016
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theopolis commented Feb 17, 2016

You'll most likely choose to merge #602, but for posterity: this implementation of SNI does work.

Although not captured in unit tests, a traffic dump shows the TLS server_name extension when the .openssl_sni_hostname is set. I tested against a host requiring SNI and the test client works as expected, whereas without the SNI client support it does not.

@theopolis theopolis closed this Feb 17, 2016
@theopolis theopolis reopened this Feb 19, 2016
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glynos commented Feb 19, 2016

LGTM

glynos added a commit that referenced this pull request Feb 19, 2016
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Merge pull request #601 from theopolis/0.12-devel
6689911 
[#600] Add TLS SNI hostname to client options
@glynos glynos merged commit 6689911 into cpp-netlib:0.12-devel Feb 19, 2016
@theopolis theopolis mentioned this pull request Feb 23, 2016
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@theopolis @glynos