# Copyright (c) 2018 Yubico AB
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"""
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)
