keyring 9.3

Store and access your passwords safely.

=======================================
Installing and Using Python Keyring Lib
=======================================

.. contents:: **Table of Contents**

---------------------------
What is Python keyring lib?
---------------------------

The Python keyring lib provides a easy way to access the system keyring service
from python. It can be used in any application that needs safe password storage.

The keyring library is licensed under both the `MIT license
<http://opensource.org/licenses/MIT>`_ and the PSF license.

These recommended keyring backends are supported by the Python keyring lib:

* Mac OS X `Keychain
<https://en.wikipedia.org/wiki/Keychain_%28software%29>`_
* Freedesktop `Secret Service
<http://standards.freedesktop.org/secret-service/>`_ (requires
`secretstorage <https://pypi.python.org/pypi/secretstorage>`_)
* `KWallet <https://en.wikipedia.org/wiki/KWallet>`_
(requires `dbus <https://pypi.python.org/pypi/dbus-python>`_)
* `Windows Credential Vault
<http://windows.microsoft.com/en-us/windows7/what-is-credential-manager>`_

Other keyring implementations are provided in the `keyrings.alt
package <https://pypi.python.org/pypi/keyrings.alt>`_.

-------------------------
Installation Instructions
-------------------------

Install from Index
==================

Install using your favorite installer. For example:

$ pip install keyring

Linux
-----

On Linux, the recommended keyring relies on SecretStorage, which in
turn relies on dbus-python, but dbus-python does not install correctly
when using the Python installers, so dbus-python must be installed
as a system package. See `SecretStorage
<https://github.com/mitya57/secretstorage>`_ for details.

-------------
Using Keyring
-------------

The basic usage of keyring is pretty simple: just call `keyring.set_password`
and `keyring.get_password`:

>>> import keyring
>>> keyring.set_password("system", "username", "password")
>>> keyring.get_password("system", "username")
'password'

Command-line Utility
====================

Keyring supplies a ``keyring`` command which is installed with the
package. After installing keyring in most environments, the
command should be available for setting, getting, and deleting
passwords. For more information on usage, invoke with no arguments
or with ``--help`` as so::

$ keyring --help
$ keyring set system username
Password for 'username' in 'system':
$ keyring get system username
password

The command-line functionality is also exposed as an executable
package, suitable for invoking from Python like so::

$ python -m keyring --help
$ python -m keyring set system username
Password for 'username' in 'system':
$ python -m keyring get system username
password

--------------------------
Configure your keyring lib
--------------------------

The python keyring lib contains implementations for several backends. The
library will
automatically choose the keyring that is most suitable for your current
environment. You can also specify the keyring you like to be used in the
config file or by calling the ``set_keyring()`` function.

Customize your keyring by config file
=====================================

This section describes how to change your option in the config file.

Config file path
----------------

The configuration of the lib is stored in a file named "keyringrc.cfg". This
file must be found in a platform-specific location. To determine
where the config file is stored, run the following::

python -c "import keyring.util.platform_; print(keyring.util.platform_.config_root())"

Some keyrings also store the keyring data in the file system. To determine
where the data files are stored, run this command::

python -c "import keyring.util.platform_; print(keyring.util.platform_.data_root())"


Config file content
-------------------

To specify a keyring backend, set the **default-keyring** option to the
full path of the class for that backend, such as
``keyring.backends.OS_X.Keyring``.

If **keyring-path** is indicated, keyring will add that path to the Python
module search path before loading the backend.

For example, this config might be used to load the SimpleKeyring from the demo
directory in the project checkout::

[backend]
default-keyring=simplekeyring.SimpleKeyring
keyring-path=/home/kang/pyworkspace/python-keyring-lib/demo/


Write your own keyring backend
==============================

The interface for the backend is defined by ``keyring.backend.KeyringBackend``.
Every backend should derive from that base class and define a ``priority``
attribute and three functions: ``get_password()``, ``set_password()``, and
``delete_password()``.

See the ``backend`` module for more detail on the interface of this class.


Set the keyring in runtime
==========================

Keyring additionally allows programmatic configuration of the
backend calling the api ``set_keyring()``. The indicated backend
will subsequently be used to store and retrieve passwords.

Here's an example demonstrating how to invoke ``set_keyring``::

# define a new keyring class which extends the KeyringBackend
import keyring.backend

class TestKeyring(keyring.backend.KeyringBackend):
"""A test keyring which always outputs same password
"""
priority = 1

def set_password(self, servicename, username, password):
pass

def get_password(self, servicename, username):
return "password from TestKeyring"

def delete_password(self, servicename, username, password):
pass

# set the keyring for keyring lib
keyring.set_keyring(TestKeyring())

# invoke the keyring lib
try:
keyring.set_password("demo-service", "tarek", "passexample")
print("password stored sucessfully")
except keyring.errors.PasswordSetError:
print("failed to store password")
print("password", keyring.get_password("demo-service", "tarek"))


Using Keyring on Ubuntu 16.04
=============================

The following is a complete transcript for installing keyring in a
virtual environment on Ubuntu 16.04. No config file was used.::

$ sudo apt install python3-venv libdbus-glib-1-dev
$ cd /tmp
$ pyvenv py3
$ source py3/bin/activate
$ pip install -U pip
$ pip install secretstorage dbus-python
$ pip install keyring
$ python
>>> import keyring
>>> keyring.get_keyring()
<keyring.backends.SecretService.Keyring object at 0x7f9b9c971ba8>
>>> keyring.set_password("system", "username", "password")
>>> keyring.get_password("system", "username")
'password'



Using Keyring on headless Linux systems
=======================================

It is possible to use the SecretService backend on Linux systems without
X11 server available (only D-Bus is required). To do that, you need the
following:

* Install the `GNOME Keyring`_ daemon.
* Start a D-Bus session, e.g. run ``dbus-run-session -- sh`` and run
the following commands inside that shell.
* Run ``gnome-keyring-daemon`` with ``--unlock`` option. The description of
that option says:

Read a password from stdin, and use it to unlock the login keyring
or create it if the login keyring does not exist.

When that command is started, enter your password into stdin and
press Ctrl+D (end of data). After that the daemon will fork into
background (use ``--foreground`` option to prevent that).
* Now you can use the SecretService backend of Keyring. Remember to
run your application in the same D-Bus session as the daemon.

.. _GNOME Keyring: https://wiki.gnome.org/Projects/GnomeKeyring

-----------------------------------------------
Integrate the keyring lib with your application
-----------------------------------------------

API interface
=============

The keyring lib has a few functions:

* ``get_keyring()``: Return the currently-loaded keyring implementation.
* ``get_password(service, username)``: Returns the password stored in the
active keyring. If the password does not exist, it will return None.
* ``set_password(service, username, password)``: Store the password in the
keyring.
* ``delete_password(service, username)``: Delete the password stored in
keyring. If the password does not exist, it will raise an exception.

------------
Get involved
------------

Python keyring lib is an open community project and highly welcomes new
contributors.

* Repository: https://github.com/jaraco/keyring/
* Bug Tracker: https://github.com/jaraco/keyring/issues/
* Mailing list: http://groups.google.com/group/python-keyring

Making Releases
===============

Python keyring lib uses a simple tag and release process. The simplified
workflow is first tag a release, then invoke ``setup.py release``.

Other things to consider when making a release:

- first ensure that tests pass (preferably on Windows and Linux)
- check that the changelog is current for the intended release
- after tagging, but before releasing, push the changes to the repository

Running Tests
=============

Tests are `continuously run <https://travis-ci.org/#!/jaraco/keyring>`_ using
Travis-CI.

|BuildStatus|_

.. |BuildStatus| image:: https://secure.travis-ci.org/jaraco/keyring.png
.. _BuildStatus: http://travis-ci.org/jaraco/keyring

To run the tests yourself, you'll want keyring installed to some environment
in which it can be tested. Recommended techniques are described below.

Using pytest runner
-------------------

Keyring is instrumented with `pytest runner
<https://bitbucket.org/jaraco/pytest-runner>`_. Thus, you may invoke the tests
from any supported Python (with setuptools installed) using this command::

python setup.py test

pytest runner will download any unmet dependencies and run the tests using
`pytest <https://bitbucket.org/hpk42/pytest>`_.

This technique is the one used by the Travis-CI script.

Using virtualenv and pytest/nose/unittest
-----------------------------------------

Pytest and Nose are two popular test runners that will discover tests and run
them. Unittest also has a mode to discover tests.

First, however, these test runners typically need a test environment in which
to run. It is recommended that you install keyring to a virtual environment
to avoid interfering with your system environment. For more information, see
the `venv documentation <https://docs.python.org/dev/library/venv.html>`_ or
the `virtualenv homepage <http://www.virtualenv.org>`_.

After you've created (or designated) your environment, install keyring into
the environment by running::

python setup.py develop

You then need to install the test requirements with something like::

pip install $( python -c "import setup, subprocess; print(subprocess.list2cmdline(setup.test_requirements))" )

Then, invoke your favorite test runner, e.g.::

py.test

or::

nosetests

----------
Background
----------

The project was based on Tarek Ziade's idea in `this post`_. Kang Zhang
initially carried it out as a `Google Summer of Code`_ project, and Tarek
mentored Kang on this project.

.. _this post: http://tarekziade.wordpress.com/2009/03/27/pycon-hallway-session-1-a-keyring-library-for-python/
.. _Google Summer of Code: http://socghop.appspot.com/