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# 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
# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
"""
Connects to the first FIDO device found (starts from USB, then looks into NFC),
creates a new credential for it, and authenticates the credential.
This works with both FIDO 2.0 devices as well as with U2F devices.
On Windows, the native WebAuthn API will be used.
"""
from fido2.server import Fido2Server
from exampleutils import get_client
# Locate a suitable FIDO authenticator
client = get_client(lambda client: client.info.options.get("rk"))
# Prefer UV if supported and configured
uv = "discouraged"
if client.info.options.get("uv") or client.info.options.get("bioEnroll"):
uv = "preferred"
print("Authenticator is configured for User Verification")
server = Fido2Server({"id": "example.com", "name": "Example RP"}, attestation="direct")
user = {"id": b"user_id", "name": "A. User"}
# Prepare parameters for makeCredential
create_options, state = server.register_begin(
user,
resident_key_requirement="required",
user_verification=uv,
authenticator_attachment="cross-platform",
)
# Create a credential
result = client.make_credential(
{
**create_options["publicKey"],
# This extension isn't needed, but can be used to verify that the created
# credential uses resident key
"extensions": {"credProps": True},
}
)
# Complete registration
auth_data = server.register_complete(
state, result.client_data, result.attestation_object
)
credentials = [auth_data.credential_data]
print("New credential created!")
print("CLIENT DATA:", result.client_data)
print("ATTESTATION OBJECT:", result.attestation_object)
print()
print("CREDENTIAL DATA:", auth_data.credential_data)
print()
print("Credential Properties:", result.extension_results.get("credProps"))
# credProps:
cred_props = result.extension_results.get("credProps")
print("CredProps", cred_props)
# Prepare parameters for getAssertion
request_options, state = server.authenticate_begin(user_verification=uv)
# Authenticate the credential
selection = client.get_assertion(request_options["publicKey"])
result = selection.get_response(0) # There may be multiple responses, get the first.
print("USER ID:", result.user_handle)
# Complete authenticator
server.authenticate_complete(
state,
credentials,
result.credential_id,
result.client_data,
result.authenticator_data,
result.signature,
)
print("Credential authenticated!")
print("CLIENT DATA:", result.client_data)
print()
print("AUTHENTICATOR DATA:", result.authenticator_data)
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