python-fido2/examples/credential.py

82 lines
3.0 KiB
Python

# Copyright (c) 2018 Yubico AB
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or
# without modification, are permitted provided that the following
# conditions are met:
#
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above
# copyright notice, this list of conditions and the following
# disclaimer in the documentation and/or other materials provided
# with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
# COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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"""
Connects to the first FIDO device found, creates a new credential for it,
and authenticates the credential. This works with both FIDO 2.0 devices as well
as with U2F devices.
"""
from __future__ import print_function, absolute_import
from fido_host.hid import CtapHidDevice
from fido_host.client import Fido2Client
import sys
# Locate a device
dev = next(CtapHidDevice.list_devices(), None)
if not dev:
print('No FIDO device found')
sys.exit(1)
# Set up a FIDO 2 client using the origin https://example.com
client = Fido2Client(dev, 'https://example.com')
# Prepare parameters for makeCredential
rp = {'id': 'example.com', 'name': 'Example RP'}
user = {'id': b'user_id', 'name': 'A. User'}
challenge = 'Y2hhbGxlbmdl'
# Create a credential
print('\nTouch your authenticator device now...\n')
attestation_object, client_data = client.make_credential(rp, user, challenge)
print('New credential created!')
print('CLIENT DATA:', client_data)
print('ATTESTATION OBJECT:', attestation_object)
print()
print('CREDENTIAL DATA:', attestation_object.auth_data.credential_data)
# Prepare parameters for getAssertion
challenge = 'Q0hBTExFTkdF' # Use a new challenge for each call.
allow_list = [{
'type': 'public-key',
'id': attestation_object.auth_data.credential_data.credential_id
}]
# Authenticate the credential
print('\nTouch your authenticator device now...\n')
assertions, client_data = client.get_assertion(rp['id'], challenge, allow_list)
print('Credential authenticated!')
assertion = assertions[0] # Only one cred in allowList, only one response.
print('CLIENT DATA:', client_data)
print()
print('ASSERTION DATA:', assertion)