Certifi is a carefully curated collection of Root Certificates for validating the trustworthiness of SSL certificates while verifying the identity of TLS hosts. It has been extracted from the Requests project.
certifi is available on PyPI. Simply install it with pip:
$ pip install certifi
To reference the installed certificate authority (CA) bundle, you can use the built-in function:
>>> import certifi >>> certifi.where() '/usr/local/lib/python2.7/site-packages/certifi/cacert.pem'
Enjoy!
Browsers and certificate authorities have concluded that 1024-bit keys are
unacceptably weak for certificates, particularly root certificates. For this
reason, Mozilla has removed any weak (i.e. 1024-bit key) certificate from its
bundle, replacing it with an equivalent strong (i.e. 2048-bit or greater key)
certificate from the same CA. Because Mozilla removed these certificates from
its bundle, certifi removed them as well.
In previous versions, certifi provided the certifi.old_where() function
to intentionally re-add the 1024-bit roots back into your bundle. This was not
recommended in production and therefore was removed. To assist in migrating old
code, the function certifi.old_where() continues to exist as an alias of
certifi.where(). Please update your code to use certifi.where()
instead. certifi.old_where() will be removed in 2018.