scripts / DUO

Commit a66c87a7b3654b13666a41d45e00839c446a20bb

Authored by Frederik Lindenaar
0 parents

initial version

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.gitignore 0 → 100644
  View file @a66c87a
  1 +++ a/.gitignore
  1 +# config files (we only check in templates
  2 +*.conf
  3 +
  4 +# virtualenv environments
  5 +.Python
  6 +__pycache__/
  7 +bin/
  8 +lib/
  9 +include/
  10 +
  11 +# pip
  12 +pip-selfcheck.json
... ...
LICENSE.txt 0 → 100644
  View file @a66c87a
  1 +++ a/LICENSE.txt
  1 + GNU GENERAL PUBLIC LICENSE
  2 + Version 3, 29 June 2007
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  622 +
  623 + How to Apply These Terms to Your New Programs
  624 +
  625 + If you develop a new program, and you want it to be of the greatest
  626 +possible use to the public, the best way to achieve this is to make it
  627 +free software which everyone can redistribute and change under these terms.
  628 +
  629 + To do so, attach the following notices to the program. It is safest
  630 +to attach them to the start of each source file to most effectively
  631 +state the exclusion of warranty; and each file should have at least
  632 +the "copyright" line and a pointer to where the full notice is found.
  633 +
  634 + <one line to give the program's name and a brief idea of what it does.>
  635 + Copyright (C) <year> <name of author>
  636 +
  637 + This program is free software: you can redistribute it and/or modify
  638 + it under the terms of the GNU General Public License as published by
  639 + the Free Software Foundation, either version 3 of the License, or
  640 + (at your option) any later version.
  641 +
  642 + This program is distributed in the hope that it will be useful,
  643 + but WITHOUT ANY WARRANTY; without even the implied warranty of
  644 + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  645 + GNU General Public License for more details.
  646 +
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  648 + along with this program. If not, see <http://www.gnu.org/licenses/>.
  649 +
  650 +Also add information on how to contact you by electronic and paper mail.
  651 +
  652 + If the program does terminal interaction, make it output a short
  653 +notice like this when it starts in an interactive mode:
  654 +
  655 + <program> Copyright (C) <year> <name of author>
  656 + This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
  657 + This is free software, and you are welcome to redistribute it
  658 + under certain conditions; type `show c' for details.
  659 +
  660 +The hypothetical commands `show w' and `show c' should show the appropriate
  661 +parts of the General Public License. Of course, your program's commands
  662 +might be different; for a GUI interface, you would use an "about box".
  663 +
  664 + You should also get your employer (if you work as a programmer) or school,
  665 +if any, to sign a "copyright disclaimer" for the program, if necessary.
  666 +For more information on this, and how to apply and follow the GNU GPL, see
  667 +<http://www.gnu.org/licenses/>.
  668 +
  669 + The GNU General Public License does not permit incorporating your program
  670 +into proprietary programs. If your program is a subroutine library, you
  671 +may consider it more useful to permit linking proprietary applications with
  672 +the library. If this is what you want to do, use the GNU Lesser General
  673 +Public License instead of this License. But first, please read
  674 +<http://www.gnu.org/philosophy/why-not-lgpl.html>.
... ...
README.md 0 → 100644
  View file @a66c87a
  1 +++ a/README.md
  1 +DUO scripts
  2 +===========
  3 +This repository contains a few scripts to interact with [DUO](https://duo.com),
  4 +a multi-factor authentication solutions acquired by [Cisco](http://cisco.con).
  5 +
  6 +Although DUO provides many ways to integrate it and various client libraries,
  7 +this was not sufficient (or too heavy) for some of the private / not for profit
  8 +environments I use it with a free (i.e. max 10 user) subscription.
  9 +
  10 +The latest versions, documentation and bugtracker are available on my
  11 +[GitLab instance](https://gitlab.lindenaar.net/scripts/duo)
  12 +
  13 +Copyright (c) 2019 Frederik Lindenaar. free for distribution under the GNU
  14 +General Public License, see [below](#license)
  15 +
  16 +
  17 +Contents
  18 +========
  19 +This repository contains the following scripts:
  20 + * [duo_api.py](#duo_api)
  21 + pure Python3 implementation of the DUO client using only standard libraries
  22 + (i.e. not requiring external libraries) with examples
  23 + * [duo_library.py](#duo_library)
  24 + simple example to trigger authentication using DUO's Python client library
  25 +
  26 +Run `pydoc <scriptname>` for the documentation of each script.
  27 +
  28 +
  29 +<a name=duo_api>duo_api.py</a>
  30 +----------------------------------------------------------------
  31 +This Python script implements the client side of the DUO API using only default
  32 +installed python3 libaries (i.e. no DUO library) and can be used without the
  33 +need to install other libraries and outside a virtualenv.
  34 +
  35 +The script could be used as library itself though that would defeat the whole
  36 +purpose (apart from it being very simple/small) but it intended as starting
  37 +point / template to implement you own custom logic directly. It contains a
  38 +number of examples of the implemented direct and config-based method to start.
  39 +
  40 +To run the config-file implementation of the client create a config file named
  41 +`duo_api.conf` in the same directory as the script using the provided template
  42 +`duo_api.tmpl` and configure it for your environment and run it. To use it
  43 +without config file, comment out the settings and code provided for that, set
  44 +the configuration values for your environment and run it.
  45 +
  46 +
  47 +<a name=duo_library>duo_library.py</a>
  48 +---------------------------------------------
  49 +Sample python script using the DUO API library for python to perform some simple
  50 +requests to test it and as template to implement a simple client using this
  51 +library. The logic implemented in this file matches that of the pure Python3
  52 +implementation of the API client in [duo_api.py](#duo_api) to compare them and
  53 +decide how best to integrate with DUO in your environment. To run this example:
  54 + 1. create a virtualenv in this directory with: `virtualenv .`
  55 + 2. activate the virtualenv with: `. ./bin/activate`
  56 + 3. install the required libraries with: `pip install -r requirements.txt`
  57 + 4. update this script and provide your API `host`, `ikey` and `skey`
  58 + 5. run the script: `python3 duo_library.py`
  59 +
  60 +
  61 +<a name="license">License</a>
  62 +-----------------------------
  63 +These scripts, documentation & configration examples are free software: you can
  64 +redistribute and/or modify it under the terms of the GNU General Public License
  65 +as published by the Free Software Foundation, either version 3 of the License,
  66 +or (at your option) any later version.
  67 +
  68 +This script, documenatation and configuration examples are distributed in the
  69 +hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
  70 +warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  71 +General Public License for more details.
  72 +
  73 +You should have received a copy of the GNU General Public License along with
  74 +this program. If not, download it from <http://www.gnu.org/licenses/>.
  75 +
... ...
duo_api.py 0 → 100755
  View file @a66c87a
  1 +++ a/duo_api.py
  1 +#! /usr/bin/env python3
  2 +
  3 +#
  4 +# duo_api.py - pure python3 implementation of an DUO API client
  5 +#
  6 +# Version 1.0, latest version, documentation and bugtracker available at:
  7 +# https://gitlab.lindenaar.net/scripts/duo
  8 +#
  9 +# Copyright (c) 2019 Frederik Lindenaar
  10 +#
  11 +# This script is free software: you can redistribute and/or modify it under the
  12 +# terms of version 3 of the GNU General Public License as published by the Free
  13 +# Software Foundation, or (at your option) any later version of the license.
  14 +#
  15 +# This script is distributed in the hope that it will be useful but WITHOUT ANY
  16 +# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
  17 +# A PARTICULAR PURPOSE. See the GNU General Public License for more details.
  18 +#
  19 +# You should have received a copy of the GNU General Public License along with
  20 +# this program. If not, visit <http://www.gnu.org/licenses/> to download it.
  21 +#
  22 +
  23 +""" Python3 DUO API client implementation using standard libraries.
  24 +
  25 + This python script implements the client side of the DUO API using only
  26 + python3 libaries installed by default (i.e. no DUO library) and can be used
  27 + without the need to install any other libraries and outside a virtualenv.
  28 +
  29 + The script could be used as library itself though that would defeat the
  30 + whole purpose (apart from it being very simple/small) but it intended as
  31 + starting point / template to implement you own custom logic directly. It
  32 + contains a number of examples of the implemented direct and config-based
  33 + method to get you started.
  34 +
  35 + To run the config-file implementation of the client, simply create a config
  36 + file (duo_api.conf) from the template (duo_api.tmpl) and configure it for
  37 + your environment in the same directory as this script and run it. To use it
  38 + without config file, comment out the code below and provide your values.
  39 +
  40 + See https://duo.com/docs/authapi and https://duo.com/docs/adminapi for the
  41 + available endpoints, parameters and responses.
  42 +"""
  43 +
  44 +
  45 +from base64 import b64encode
  46 +from configparser import ConfigParser
  47 +from email.utils import formatdate as timestamp
  48 +from hashlib import sha1 as SHA1
  49 +from hmac import new as hmac
  50 +from json import loads as parse_json
  51 +from os.path import splitext
  52 +from sys import argv
  53 +from urllib.error import HTTPError
  54 +from urllib.parse import quote as urlquote
  55 +from urllib.request import urlopen, Request
  56 +
  57 +
  58 +def urlencode(p):
  59 + """ URL-encodes HTTP paramaters provided in the passed dict / (k,v) list """
  60 + return '&'.join([ urlquote(k,'~') + '=' + urlquote(v,'~')
  61 + for (k, v) in (p.items() if isinstance(p, dict) else p if p else [] )])
  62 +
  63 +
  64 +def duo_api(host, ikey, skey, path, params=None, method=None, proto='https'):
  65 + """ Performs an authenticated DUO API request returning its JSON response
  66 +
  67 + Parameters:
  68 + host: API Hostname (from DUO Admin application config)
  69 + ikey: API Integration Key (from DUO Admin application config)
  70 + skey: API Secret Key (from DUO Admin application config)
  71 + path: REST request path, e.g. '/auth/v2/check'
  72 + params: dict with unencoded request parameters, will be URL-encoded
  73 + method: http method, auto-detected (POST with params, GET otherwise)
  74 + proto: protocol, defaults to 'https'
  75 +
  76 + Returns: the API response (JSON Object)
  77 + """
  78 + ts, method = timestamp(), method if method else 'POST' if params else 'GET'
  79 + data = urlencode(sorted(params.items())) if params else ''
  80 + auth = '\n'.join([ts, method.upper(), host.lower(), path, data]).encode()
  81 + sig = (ikey + ':' + hmac(skey.encode(), auth, SHA1).hexdigest()).encode()
  82 + return parse_json(urlopen(Request(proto + '://' + host + path, headers={
  83 + 'Date': ts, 'Authorization': 'Basic ' + b64encode(sig).decode()
  84 + }, method=method, data=data.encode())).read())['response']
  85 +
  86 +
  87 +def duo_api_config(config, req, vars=None):
  88 + """ Performs an authenticated DUO API request with duo_api() using a dict()
  89 + or ConfigParser Object containing at least the key (section) 'API'.
  90 +
  91 + Parameters:
  92 + config: ConfigParser object (or dict) with at least an API section
  93 + section: name of the DUO API endpoint and config section to use
  94 + vars: (optional) dict with variables for substitution in values
  95 +
  96 + Returns: the API response (JSON Object)
  97 +
  98 + To pass parameters with the request, provide a dict (section) with a key
  99 + equal to req. Below sample ConfigParser config file for an auth request:
  100 +
  101 + [API]
  102 + host=api-XXXXXXXX.duosecurity.com
  103 + ikey=XXXXXXXXXXXXXXXXXXXX
  104 + skey=XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
  105 + path=/auth/v2/
  106 +
  107 + [auth]
  108 + username=username
  109 + factor=push
  110 + device=auto
  111 + type=Network Access
  112 + display_username=Test User
  113 + pushinfo=explanation=Text+section(s)+shown+to+the+user&mode=TEST
  114 +
  115 + Sections correspond with the API endpoint / request in req. For multiple
  116 + instances of the same requests, append a suffix to the section name with
  117 + an underscore ('_') as everything after that will be ignored as request
  118 + name. Within the section keywords correspond to the request parameters.
  119 + In case no parameters are required (e.g. for 'check' only API suffices).
  120 + When using a ConfigParser object, variable substitution is supported for
  121 + with the parameters passed in vars to make things dynamic.
  122 + """
  123 + apiconf = config['API']
  124 + path = (apiconf['path'] + '/' + req.split('_')[0]).replace('//', '/') \
  125 + if 'path' in apiconf and req[0] != '/' else req.split('_')[0]
  126 + params = config.get(req, None) if not isinstance(config, ConfigParser) \
  127 + else dict(config.items(req, vars=vars)) if req in config else None
  128 + return duo_api(apiconf['host'],apiconf['ikey'],apiconf['skey'],path,params)
  129 +
  130 +
  131 +# Main logic to execute is case this is the called script
  132 +if __name__ == '__main__':
  133 + try:
  134 + # Example using duo_api() directly, make sure you set parameters below!
  135 + # host='api-XXXXXXXX.duosecurity.com'
  136 + # ikey='XXXXXXXXXXXXXXXXXXXX'
  137 + # skey='XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX'
  138 + # response = duo_api(host, ikey, skey, '/auth/v2/check')
  139 + # print(response)
  140 +
  141 + # More complex example, request DUO token authorization with parameters
  142 + # params = { 'username': 'username',
  143 + # 'factor': 'push',
  144 + # 'device': 'auto',
  145 + # 'type': 'Network Access',
  146 + # 'display_username': 'Test User',
  147 + # 'pushinfo': urlencode({
  148 + # 'explanation': 'Text section(s) shown to the user',
  149 + # 'mode': 'TEST'
  150 + # })
  151 + # }
  152 + # response = duo_api(host, ikey, skey, '/auth/v2/auth', params)
  153 + # print(response)
  154 + # print('Access', response['result'])
  155 +
  156 + # Same example as above, now using a config file, for this to work copy
  157 + # the file duo_api.tmpl to duo_api.conf and update for your environment
  158 + config = ConfigParser()
  159 + if not config.read(splitext(argv[0])[0] + '.conf'):
  160 + print("Missing/unreadable config file",splitext(argv[0])[0]+'.conf')
  161 + exit(1)
  162 +
  163 + apiconf = config['API']
  164 + print(apiconf.get('aaa', fallback='bbb'))
  165 + exit()
  166 +
  167 +
  168 + response = duo_api_config(config, 'check') # Check connectivity/auth.
  169 + print(response)
  170 +
  171 + response = duo_api_config(config, 'auth') # trigger DUO authorization
  172 + print(response)
  173 + print('Access', response['result'])
  174 +
  175 + # Example of a second authorization definition with dynamic parameters
  176 + context = { # Populate context from the command line (if provided)
  177 + 'login': argv[1] if len(argv) > 1 else 'username',
  178 + 'name': argv[2] if len(argv) > 2 else 'Dynamic User',
  179 + 'banner': argv[3] if len(argv) > 3 else 'Access Request'
  180 + }
  181 + response = duo_api_config(config, 'auth_dynamic', vars=context)
  182 + print(response)
  183 + print('Access', response['result'])
  184 +
  185 + except HTTPError as e:
  186 + print('Configuration Error', e, '(invalid parameters?)')
  187 +
... ...
duo_api.tmpl 0 → 100644
  View file @a66c87a
  1 +++ a/duo_api.tmpl
  1 +#
  2 +# duo_api.tmpl - config template for duo_api.py, a pure python3 DUO API client
  3 +#
  4 +# Version 1.0, latest version, documentation and bugtracker available at:
  5 +# https://gitlab.lindenaar.net/scripts/duo
  6 +#
  7 +# Copyright (c) 2019 Frederik Lindenaar
  8 +#
  9 +# This file is free software: you can redistribute and/or modify it under the
  10 +# terms of version 3 of the GNU General Public License as published by the Free
  11 +# Software Foundation, or (at your option) any later version of the license.
  12 +#
  13 +# This script is distributed in the hope that it will be useful but WITHOUT ANY
  14 +# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
  15 +# A PARTICULAR PURPOSE. See the GNU General Public License for more details.
  16 +#
  17 +# You should have received a copy of the GNU General Public License along with
  18 +# this program. If not, visit <http://www.gnu.org/licenses/> to download it.
  19 +#
  20 +
  21 +# To use this file with duo_api.py, rename it to duo_api.conf and update it for
  22 +# your DUO environment. For documentation, please run: pydoc duo_api
  23 +
  24 +# The API section should reflect the DUO '3rd party API' Application to be used
  25 +[API]
  26 +host=api-XXXXXXXX.duosecurity.com
  27 +ikey=XXXXXXXXXXXXXXXXXXXX
  28 +skey=XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
  29 +path=/auth/v2/
  30 +
  31 +# The remainder of this file defines each DUO API request to be issued in a
  32 +# separate section. Multiple sections can be configured for the same request by
  33 +# appending a suffix starting with an underscore ('_').
  34 +# See https://duo.com/docs/authapi and https://duo.com/docs/adminapi for the
  35 +# available endpoints, parameters and responses.
  36 +
  37 +# Example for a fixed-value 'auth' request for DUO authorization
  38 +[auth]
  39 +username=username
  40 +factor=push
  41 +device=auto
  42 +type=Network Access
  43 +display_username=Test User
  44 +# pushinfo must be URL encoded, see also https://duo.com/docs/authapi#/auth
  45 +pushinfo=explanation=Text+section(s)+shown+to+the+user&mode=TEST
  46 +
  47 +# Example for a dynamic 'auth' request for DUO authorization, %(..)s instances
  48 +# are replaced by the code for values passed at runtime, this allows configuring
  49 +# the request in the config and only passing the dynamic values at runtime
  50 +[auth_dynamic]
  51 +username=%(login)s
  52 +factor=push
  53 +device=auto
  54 +type=%(banner)s
  55 +display_username=%(name)s
  56 +
... ...
duo_library.py 0 → 100755
  View file @a66c87a
  1 +++ a/duo_library.py
  1 +#! /usr/bin/env python3
  2 +
  3 +#
  4 +# duo_library.py - simple DUO Python library client template
  5 +#
  6 +# Version 1.0, latest version, documentation and bugtracker available at:
  7 +# https://gitlab.lindenaar.net/scripts/duo
  8 +#
  9 +# Copyright (c) 2019 Frederik Lindenaar
  10 +#
  11 +# This script is free software: you can redistribute and/or modify it under the
  12 +# terms of version 3 of the GNU General Public License as published by the Free
  13 +# Software Foundation, or (at your option) any later version of the license.
  14 +#
  15 +# This script is distributed in the hope that it will be useful but WITHOUT ANY
  16 +# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
  17 +# A PARTICULAR PURPOSE. See the GNU General Public License for more details.
  18 +#
  19 +# You should have received a copy of the GNU General Public License along with
  20 +# this program. If not, visit <http://www.gnu.org/licenses/> to download it.
  21 +#
  22 +
  23 +""" simple DUO Python library client template.
  24 +
  25 + This python script uses the DUO API library for python to perform some
  26 + simple requests to test it and as template to implement a simple client
  27 + using this library. The logic implemented in this file matches that of
  28 + the pure Python3 implementation of the API client in duo_api.py to compare
  29 + them and decide how best to integrate with DUO in your environment.
  30 +
  31 + To run this example:
  32 + 1. create a virtualenv in this directory with: virtualenv .
  33 + 2. activate the virtualenv with: . ./bin/activate
  34 + 3. install the required libraries with: pip install -r requirements.txt
  35 + 4. update this script and provide your API host, ikey and skey below
  36 + 5. run this script
  37 +
  38 + See https://duo.com/docs/authapi and https://duo.com/docs/adminapi for the
  39 + available endpoints, parameters and responses. For the Python library and
  40 + its documentation see: https://github.com/duosecurity/duo_client_python
  41 +"""
  42 +
  43 +import duo_client as DUO
  44 +
  45 +# Main logic to execute is case this is the called script
  46 +if __name__ == '__main__':
  47 +
  48 + # Instantiate DUO Auth API class, make sure you set parameters below!
  49 + host='api-XXXXXXXX.duosecurity.com'
  50 + ikey='XXXXXXXXXXXXXXXXXXXX'
  51 + skey='XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX'
  52 + duo_auth_api = DUO.Auth(host=host, ikey=ikey, skey=skey)
  53 +
  54 + # Simple example, check the connectivity
  55 + response = duo_auth_api.check()
  56 + print(response)
  57 +
  58 + # More complex example, request DUO token authorization with parameters
  59 + response = duo_auth_api.auth(
  60 + username='username',
  61 + factor='push',
  62 + device='auto',
  63 + type='Network Access',
  64 + display_username='Test User',
  65 + pushinfo='explanation=Text+section(s)+shown+to+the+user&mode=TEST')
  66 + print(response)
  67 +
... ...
requirements.txt 0 → 100644
  View file @a66c87a
  1 +++ a/requirements.txt
  1 +duo-client
... ...