did a little work
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u2fClient.py
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u2fClient.py
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from fido2.hid import CtapHidDevice
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from fido2.client import Fido2Client
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from fido2.server import Fido2Server
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from fido2.webauthn import PublicKeyCredentialRpEntity
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# Discover FIDO2 devices connected via USB
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devices = list(CtapHidDevice.list_devices())
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if not devices:
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raise ValueError("No FIDO2 device found")
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device = devices[0]
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# Use the first available device
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client = Fido2Client(device, "https://example.com")
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rp = PublicKeyCredentialRpEntity("example.com", "Example RP")
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server = Fido2Server(rp)
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# Example: Registration
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user = {"id": b"user_id", "name": "john_doe", "displayName": "John Doe"}
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challenge = server.register_begin(user)
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# Prompt user to perform registration action on the device
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attestation_object, client_data = client.make_credential(challenge['publicKey'])
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# Finalize registration on the server
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auth_data = server.register_complete(challenge['state'], client_data, attestation_object)
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print("Registration complete. Credential ID:", auth_data.credential_data.credential_id)
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# Example: Authentication
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credentials = [auth_data.credential_data]
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challenge = server.authenticate_begin(credentials)
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# Prompt user to perform authentication action on the device
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assertion, client_data = client.get_assertion(challenge['publicKey'])
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assertion_response = assertion[0] # Assuming the first assertion (most common scenario)
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# Finalize authentication on the server
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server.authenticate_complete(challenge['state'], credentials, assertion_response, client_data)
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print("Authentication successful!")
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u2fServer.py
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u2fServer.py
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#!/usr/bin/env python
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# Copyright (c) 2013 Yubico AB
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or
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# without modification, are permitted provided that the following
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# conditions are met:
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#
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above
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# copyright notice, this list of conditions and the following
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# disclaimer in the documentation and/or other materials provided
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# with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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# COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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# POSSIBILITY OF SUCH DAMAGE.
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"""
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Example web server providing single factor U2F enrollment and authentication.
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It is intended to be run standalone in a single process, and stores user data
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in memory only, with no permanent storage.
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Enrollment will overwrite existing users.
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If username is omitted, a default value of "user" will be used.
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Any error will be returned as a stacktrace with a 400 response code.
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Note that this is intended for test/demo purposes, not production use!
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This example requires webob to be installed.
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"""
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from u2flib_server.u2f import (begin_registration, begin_authentication,
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complete_registration, complete_authentication)
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from cryptography import x509
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from cryptography.hazmat.backends import default_backend
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from cryptography.hazmat.primitives.serialization import Encoding
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from webob.dec import wsgify
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from webob import exc
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import logging as log
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import json
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import traceback
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import argparse
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def get_origin(environ):
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if environ.get('HTTP_HOST'):
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host = environ['HTTP_HOST']
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else:
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host = environ['SERVER_NAME']
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if environ['wsgi.url_scheme'] == 'https':
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if environ['SERVER_PORT'] != '443':
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host += ':' + environ['SERVER_PORT']
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else:
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if environ['SERVER_PORT'] != '80':
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host += ':' + environ['SERVER_PORT']
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return '%s://%s' % (environ['wsgi.url_scheme'], host)
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class U2FServer(object):
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"""
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Very basic server providing a REST API to enroll one or more U2F device with
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a user, and to perform authentication with the enrolled devices.
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Only one challenge is valid at a time.
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Four calls are provided: enroll, bind, sign and verify. Each of these
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expects a username parameter, and bind and verify expect a
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second parameter, data, containing the JSON formatted data which is output
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by the U2F browser API upon calling the ENROLL or SIGN commands.
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"""
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def __init__(self):
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self.users = {}
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@wsgify
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def __call__(self, request):
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self.facet = get_origin(request.environ)
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self.app_id = self.facet
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page = request.path_info_pop()
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if not page:
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return json.dumps([self.facet])
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try:
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username = request.params.get('username', 'user')
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data = request.params.get('data', None)
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if page == 'enroll':
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return self.enroll(username)
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elif page == 'bind':
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return self.bind(username, data)
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elif page == 'sign':
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return self.sign(username)
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elif page == 'verify':
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return self.verify(username, data)
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else:
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raise exc.HTTPNotFound()
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except Exception:
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log.exception("Exception in call to '%s'", page)
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return exc.HTTPBadRequest(comment=traceback.format_exc())
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def enroll(self, username):
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if username not in self.users:
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self.users[username] = {}
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user = self.users[username]
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enroll = begin_registration(self.app_id, user.get('_u2f_devices_', []))
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user['_u2f_enroll_'] = enroll.json
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return json.dumps(enroll.data_for_client)
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def bind(self, username, data):
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user = self.users[username]
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enroll = user.pop('_u2f_enroll_')
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device, cert = complete_registration(enroll, data, [self.facet])
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user.setdefault('_u2f_devices_', []).append(device.json)
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log.info("U2F device enrolled. Username: %s", username)
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cert = x509.load_der_x509_certificate(cert, default_backend())
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log.debug("Attestation certificate:\n%s",
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cert.public_bytes(Encoding.PEM))
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return json.dumps(True)
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def sign(self, username):
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user = self.users[username]
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challenge = begin_authentication(
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self.app_id, user.get('_u2f_devices_', []))
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user['_u2f_challenge_'] = challenge.json
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return json.dumps(challenge.data_for_client)
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def verify(self, username, data):
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user = self.users[username]
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challenge = user.pop('_u2f_challenge_')
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device, c, t = complete_authentication(challenge, data, [self.facet])
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return json.dumps({
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'keyHandle': device['keyHandle'],
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'touch': t,
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'counter': c
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})
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application = U2FServer()
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if __name__ == '__main__':
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from wsgiref.simple_server import make_server
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parser = argparse.ArgumentParser(
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description='U2F test server',
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add_help=True,
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formatter_class=argparse.ArgumentDefaultsHelpFormatter
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)
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parser.add_argument('-i', '--interface', nargs='?', default='localhost',
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help='network interface to bind to')
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parser.add_argument('-p', '--port', nargs='?', type=int, default=8081,
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help='TCP port to bind to')
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args = parser.parse_args()
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log.basicConfig(level=log.DEBUG, format='%(asctime)s %(message)s',
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datefmt='[%d/%b/%Y %H:%M:%S]')
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log.info("Starting server on http://%s:%d", args.interface, args.port)
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httpd = make_server(args.interface, args.port, application)
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httpd.serve_forever()
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