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Certifi: Python SSL Certificates
================================

`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.

Installation
------------

``certifi`` is available on PyPI. Simply install it with ``pip``::

$ pip install certifi

Usage
-----

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!

1024-bit Root Certificates
~~~~~~~~~~~~~~~~~~~~~~~~~~

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.

.. _`Certifi`: http://certifi.io/en/latest/
.. _`Requests`: http://docs.python-requests.org/en/latest/

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