Comment # 6 on bug 917759 from Adrian Schr�ter

however, this is a regression in python-M2Crypto in first place from my POV.

On my openSUSE 13.2, I do still have PKCS5_SALT_LEN in 
/usr/lib64/python2.7/site-packages/M2Crypto/__m2crypto.so

so, something between openssl and python-M2Crypto IMHO