asn1crypto fails on macOS Catalina, due to loading unversioned /usr/lib/libcrypto.dylib

[fxcoudert]

I know this sounds weird, but I'm filing an issue to document a problem in past versions of asn1crypto, even though it is now fixed in version 1.0.0 and later. Please feel free to close :)

On macOS 10.15 “Catalina”, we were seeing as part of Homebrew builds several python-related formulas fail to build, due to an abort in pip. The issue is the following:

• pip aborts, and the crash log contains this:

/usr/lib/libcrypto.dylib  
abort() called  
Invalid dylib load. Clients should not load the unversioned libcrypto dylib as it does not have a stable ABI.  

• That's because /usr/lib/libcrypto.dylib on Catalina is booby-trapped, and should not be used.
• It turns out is gets loaded from asn1crypto/_perf/_big_num_ctypes.py
• Because as part of asn1crypto there is no way to specific a specific library name or location for libcrypto.

Of course, when I finally managed to get the backtrace and find out the issue was located here, I then quickly discovered that this code was removed in 564e744 and should no longer be a problem with asn1crypto 1.0.0 or asn1crypto 1.2.0.

[fxcoudert]

I can confirm that building ansible with asn1crypto 1.2.0 succeeds, while it failed with pre-1.0.0 versions.

[joernheissler]

Good to see that this change improved things for you :-)
See #100 and #113 for more details.
Or #157 for an example where code needs fixing now.

[dendisuhubdy]

Happened to occur this, so annoying!

[wbond]

If you are running into this it means you are running and old version of asn1crypto. The package no longer uses libcrypto.dylib on Mac.