Python uses old openssl version on OSX #52507

System Information
macOS Sierra 10.12.5

Blender Version
Works: Blender 2.79 RC2 WIN 10
Fails: Blender 2.79 RC2 OSX

Short description of error
The user script Blender-Navcam-Importer loads external data from the NASA PDS website. This website recently switched from http to https. Running the script on Windows works OK while the OSX version fails with error message: <urlopen error [SSL: SSLV3_ALERT_HANDSHAKE_FAILURE] sslv3 alert handshake failure>.

This answer on StackOverflow suggests that the culprit is an outdated OpenSSL version. I tested this with both os's and found indeed that the Windows version of Blender uses OpenSSL 1.0.2h while the OSX version uses OpenSSL 0.9.8zh.

Exact steps for others to reproduce the error
Run 'import ssl' and 'print(ssl.OPENSSL_VERSION)' in Blender console. I believe that the failing script will work again on OSX once the OpenSSL version is updated.
Thank you!

Changed status to: 'Open'

Added subscriber: @phaseIV-3

Added subscribers: @brecht, @ArtoKitula

MacOS has indeed OpenSSL 0.9.8 @brecht what if we just add homebrew ssl to that 10.6 build? (and you do it or me?)

@ArtoKitula I'm not going to update 10.6 libraries anymore, but if you want to do it go ahead.

I'm not sure that a homebrew library will be compatible with 10.6 though, unless there's some homebrew option for deployment targets? I guess we need to build our own static OpenSSL library for Python to link to.

@phaseIV-3 Seems that script isn't updated for a while on github, so I didn't try it. But you could try my build that has OpenSSL 1.0.2l, if it works.

Wow, thank you Arto! The script works perfectly with your build, no more handshake issues. Seems the Stackoverflow poster was right about the SSL versioning. Thanks for your efforts!

@phaseIV-3 make note that that is build from today and might have some unexpected behavior. For official version you'll need to wait until 2.79 release.

No worries, I understand. The bug is solved and OpenSSL 1.0.2l is hopefully included in the upcoming OSX release, so the script will continue to work properly and that's the most important thing.
Thanks again!

So the update to version OpenSSL 1.0.2l for Mac/OSX didn't make it in 2.79. That's too bad...
Hope this gets fixed in the next version of Blender.
Thank you.

I found that the release candidate version of Blender (2.79a) is still using OpenSSL 0.9.8zh for Mac/OSX.
Maybe now it is the time to update OpenSSL to a newer version?
Thank you.

Added subscriber: @Sergey

Changed status from 'Open' to: 'Archived'

We do not perform any libraries updates for corrective releases (such as 'a'). This is far too dangerous and often breaks compatibility with some platforms.

Those libraries are at their EOL, next major release will use 10.9 libraries. Buildbot is already moved to new libraries.

This comment was removed by @phaseIV-3

Removed subscriber: @phaseIV-3

For future reference, if any, there is a workaround for downloading files through python on Blender 2.79/OSX.
See this forumpost for details.

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Python uses old openssl version on OSX #52507