It looks like Big Sur removed `libcrypto.dylib` as a file on the
filesystem, so loading it using `ctypes.find_library` fails which breaks
Kindle decryption. Now to load a dylib you need to attempt to load it
directly and the operating system will load the dylib from the OS' cache
or fail.
This fixes the problem by explicitly setting the path to libcrypto to
`/usr/lib/libcrypto.dylib` if `ctypes.find_library` does not find the
file, loading the dylib and raising an exception if it fails at that
point.
See saltstack/salt#5778 for more detailed info.
Closes#1369.
THIS IS ON THE MASTER BRANCH. The Master branch will be Python 3.0 from now on. While Python 2.7 support will not be deliberately broken, all efforts should now focus on Python 3.0 compatibility.
I can see a lot of work has been done. There's more to do. I've bumped the version number of everything I came across to the next major number for Python 3.0 compatibility indication.
Thanks everyone. I hope to update here at least once a week until we have a stable 7.0 release for calibre 5.0
