Python uses old openssl version on OSX #52507

New Issue

Rob Haarsma · 2017-08-23T15:20:17+02:00

Rob Haarsma commented

2017-08-23 15:20:17 +02:00

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This answer on StackOverflow suggests that the culprit is an outdated OpenSSL version.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!

**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 ](https://github.com/phaseIV/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 ](https://stackoverflow.com/questions/40257593/python-sslerror-sslv3-alert-handshake-failure-for-wallhaven-cc) suggests that the culprit is an outdated OpenSSL version.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!

Rob Haarsma commented

2017-08-23 15:20:17 +02:00

Changed status to: 'Open'

Rob Haarsma commented

2017-08-23 15:20:17 +02:00

Added subscriber: @phaseIV-3

Arto Kitula commented

2017-08-23 16:19:56 +02:00

Added subscribers: @brecht, @ArtoKitula

Arto Kitula commented

2017-08-23 16:19:56 +02:00

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?)

Brecht Van Lommel commented

2017-08-23 16:57:11 +02:00

@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.

@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.

Arto Kitula commented

2017-08-23 17:41:49 +02:00

@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.

@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 ](https://www.dropbox.com/s/gif8gcgnr68wfr4/blender-master-170823-macOS-10.9.zip?dl=0) that has OpenSSL 1.0.2l, if it works.

Rob Haarsma commented

2017-08-23 18:23:06 +02:00

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!

Arto Kitula commented

2017-08-23 21:45:43 +02:00

@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.

Rob Haarsma commented

2017-08-23 22:23:32 +02:00

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!

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!

Rob Haarsma commented

2017-09-13 15:17:04 +02:00

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.

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.

Arto Kitula self-assigned this 2017-09-26 13:54:05 +02:00

Rob Haarsma commented

2018-02-05 16:58:32 +01:00

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.

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.

Sergey Sharybin commented

2018-02-27 16:57:06 +01:00

Added subscriber: @Sergey

Sergey Sharybin commented

2018-02-27 16:57:06 +01:00

Changed status from 'Open' to: 'Archived'

Sergey Sharybin closed this issue

2018-02-27 16:57:06 +01:00

Sergey Sharybin commented

2018-02-27 16:57:06 +01:00

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.

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.

Rob Haarsma commented

2018-02-27 17:28:02 +01:00

This comment was removed by @phaseIV-3

*This comment was removed by @phaseIV-3*

Rob Haarsma commented

2018-02-27 18:35:14 +01:00

Removed subscriber: @phaseIV-3

Rob Haarsma commented

2018-06-08 13:32:48 +02:00

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

For future reference, if any, there is a workaround for downloading files through python on Blender 2.79/OSX. See [this forumpost ](https://forums.autodesk.com/t5/fusion-360-api-and-scripts/python-outdated-version-of-openssl-on-mac/td-p/7827232) for details.

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Python uses old openssl version on OSX #52507