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Installation
============
You can install ``PyJWT`` with ``pip``:
.. code-block:: console
$ pip install pyjwt
Cryptographic Dependencies (Optional)
-------------------
If you are planning on encoding or decoding tokens using certain digital
signature algorithms (like RSA or ECDSA), you will need to install the
cryptography_ library.
.. code-block:: console
$ pip install cryptography
.. _legacy-deps:
Legacy Dependencies
-------------------
Some environments, most notably Google App Engine, do not allow the installation
of Python packages that require compilation of C extensions and therefore
cannot install ``cryptography``. If you can install ``cryptography``, you
should disregard this section.
If you are deploying an application to one of these environments, you may
need to use the legacy implementations of the digital signature algorithms:
.. code-block:: console
$ pip install pycrypto ecdsa
Once you have installed ``pycrypto`` and ``ecdcsa``, you can tell PyJWT to use
the legacy implementations with ``jwt.register_algorithm()``. The following
example code shows how to configure PyJWT to use the legacy implementations
for RSA with SHA256 and EC with SHA256 signatures.
.. code-block:: python
import jwt
from jwt.contrib.algorithms.pycrypto import RSAAlgorithm
from jwt.contrib.algorithms.py_ecdsa import ECAlgorithm
jwt.register_algorithm('RS256', RSAAlgorithm(RSAAlgorithm.SHA256))
jwt.register_algorithm('ES256', ECAlgorithm(ECAlgorithm.SHA256))
.. _`cryptography`: https://cryptography.io
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