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Name: pyotp
Version: 2.2.1
Summary: Python One Time Password Library
Home-page: https://github.com/pyotp/pyotp
Author: PyOTP contributors
Author-email: kislyuk@gmail.com
License: BSD License
Description: PyOTP - The Python One-Time Password Library
============================================
PyOTP is a Python library for generating and verifying one-time passwords. It can be used to implement two-factor (2FA)
or multi-factor (MFA) authentication methods in web applications and in other systems that require users to log in.
Open MFA standards are defined in `RFC 4226 <https://tools.ietf.org/html/rfc4226>`_ (HOTP: An HMAC-Based One-Time
Password Algorithm) and in `RFC 6238 <https://tools.ietf.org/html/rfc6238>`_ (TOTP: Time-Based One-Time Password
Algorithm). PyOTP implements server-side support for both of these standards. Client-side support can be enabled by
sending authentication codes to users over SMS or email (HOTP) or, for TOTP, by instructing users to use `Google
Authenticator <https://en.wikipedia.org/wiki/Google_Authenticator>`_, `Authy <https://www.authy.com/>`_, or another
compatible app. Users can set up auth tokens in their apps easily by using their phone camera to scan `otpauth://
<https://github.com/google/google-authenticator/wiki/Key-Uri-Format>`_ QR codes provided by PyOTP.
Quick overview of using One Time Passwords on your phone
--------------------------------------------------------
* OTPs involve a shared secret, stored both on the phone and the server
* OTPs can be generated on a phone without internet connectivity
* OTPs should always be used as a second factor of authentication(if your phone is lost, you account is still secured with a password)
* Google Authenticator allows you to store multiple OTP secrets and provision those using a QR Code(no more typing in the secret)
Installation
------------
::
pip install pyotp
Usage
-----
Time based OTPs
~~~~~~~~~~~~~~~
::
totp = pyotp.TOTP('base32secret3232')
totp.now() # => 492039
# OTP verified for current time
totp.verify(492039) # => True
time.sleep(30)
totp.verify(492039) # => False
Counter-based OTPs
~~~~~~~~~~~~~~~~~~
::
hotp = pyotp.HOTP('base32secret3232')
hotp.at(0) # => 260182
hotp.at(1) # => 55283
hotp.at(1401) # => 316439
# OTP verified with a counter
hotp.verify(316439, 1401) # => True
hotp.verify(316439, 1402) # => False
Generating a base32 Secret Key
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
::
pyotp.random_base32() # returns a 16 character base32 secret. Compatible with Google Authenticator
Google Authenticator Compatible
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
The library works with the Google Authenticator iPhone and Android app, and also includes the ability to generate
provisioning URI's for use with the QR Code scanner built into the app::
totp.provisioning_uri("alice@google.com") # => 'otpauth://totp/alice@google.com?secret=JBSWY3DPEHPK3PXP'
hotp.provisioning_uri("alice@google.com", 0) # => 'otpauth://hotp/alice@google.com?secret=JBSWY3DPEHPK3PXP&counter=0'
This can then be rendered as a QR Code which can then be scanned and added to the users list of OTP credentials.
Working example
~~~~~~~~~~~~~~~
Scan the following barcode with your phone, using Google Authenticator
.. image:: http://chart.apis.google.com/chart?cht=qr&chs=250x250&chl=otpauth%3A%2F%2Ftotp%2Falice%40google.com%3Fsecret%3DJBSWY3DPEHPK3PXP
Now run the following and compare the output::
import pyotp
totp = pyotp.TOTP("JBSWY3DPEHPK3PXP")
print("Current OTP:", totp.now())
Links
~~~~~
* `Project home page (GitHub) <https://github.com/pyotp/pyotp>`_
* `Documentation (Read the Docs) <https://pyotp.readthedocs.org/en/latest/>`_
* `Package distribution (PyPI) <https://pypi.python.org/pypi/pyotp>`_
* `Change log <https://github.com/pyotp/pyotp/blob/master/Changes.rst>`_
* `RFC 4226: HOTP: An HMAC-Based One-Time Password <https://tools.ietf.org/html/rfc4226>`_
* `RFC 6238: TOTP: Time-Based One-Time Password Algorithm <https://tools.ietf.org/html/rfc6238>`_
* `ROTP <https://github.com/mdp/rotp>`_ - Original Ruby OTP library by `Mark Percival <https://github.com/mdp>`_
* `OTPHP <https://github.com/lelag/otphp>`_ - PHP port of ROTP by `Le Lag <https://github.com/lelag>`_
.. image:: https://img.shields.io/travis/pyotp/pyotp.svg
:target: https://travis-ci.org/pyotp/pyotp
.. image:: https://img.shields.io/codecov/c/github/pyotp/pyotp/master.svg
:target: https://codecov.io/github/pyotp/pyotp?branch=master
.. image:: https://img.shields.io/pypi/v/pyotp.svg
:target: https://pypi.python.org/pypi/pyotp
.. image:: https://img.shields.io/pypi/l/pyotp.svg
:target: https://pypi.python.org/pypi/pyotp
.. image:: https://readthedocs.org/projects/pyotp/badge/?version=latest
:target: https://pyotp.readthedocs.org/
Platform: MacOS X
Platform: Posix
Classifier: Intended Audience :: Developers
Classifier: License :: OSI Approved :: BSD License
Classifier: Operating System :: MacOS :: MacOS X
Classifier: Operating System :: POSIX
Classifier: Programming Language :: Python
Classifier: Programming Language :: Python :: 2.7
Classifier: Programming Language :: Python :: 3.3
Classifier: Programming Language :: Python :: 3.4
Classifier: Topic :: Software Development :: Libraries :: Python Modules
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