# Copyright (c) 2013 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.

from u2flib_server.attestation.metadata import MetadataProvider, Transport
from u2flib_server.attestation.resolvers import create_resolver
from u2flib_server.attestation.data import YUBICO
from cryptography import x509
from cryptography.hazmat.backends import default_backend
from base64 import b64decode
import json
import unittest

ATTESTATION_CERT = b64decode(b"""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""")


ATTESTATION_CERT_WITH_TRANSPORT = b64decode(b"""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""")


YUBICO_RESOLVER = create_resolver(YUBICO)
EMPTY_RESOLVER = create_resolver([])


class AttestationTest(unittest.TestCase):

    def test_resolver(self):
        cert = x509.load_der_x509_certificate(ATTESTATION_CERT,
                                              default_backend())
        metadata = YUBICO_RESOLVER.resolve(cert)
        assert metadata.identifier == '2fb54029-7613-4f1d-94f1-fb876c14a6fe'

    def test_provider(self):
        provider = MetadataProvider(YUBICO_RESOLVER)
        cert = x509.load_der_x509_certificate(ATTESTATION_CERT,
                                              default_backend())
        attestation = provider.get_attestation(cert)

        assert attestation.trusted

    def test_versioning_newer(self):
        resolver = create_resolver(YUBICO)
        newer = json.loads(json.dumps(YUBICO))
        newer['version'] = newer['version'] + 1
        newer['trustedCertificates'] = []

        resolver.add_metadata(newer)

        cert = x509.load_der_x509_certificate(ATTESTATION_CERT,
                                              default_backend())
        metadata = resolver.resolve(cert)

        assert metadata is None

    def test_versioning_older(self):
        resolver = create_resolver(YUBICO)
        newer = json.loads(json.dumps(YUBICO))
        newer['trustedCertificates'] = []

        resolver.add_metadata(newer)

        cert = x509.load_der_x509_certificate(ATTESTATION_CERT,
                                              default_backend())
        metadata = resolver.resolve(cert)

        assert metadata.identifier == '2fb54029-7613-4f1d-94f1-fb876c14a6fe'

    def test_transports_from_cert(self):
        provider = MetadataProvider(EMPTY_RESOLVER)
        cert = x509.load_der_x509_certificate(ATTESTATION_CERT_WITH_TRANSPORT,
                                              default_backend())
        attestation = provider.get_attestation(cert)

        assert attestation.transports == Transport.USB | Transport.NFC

    def test_transports_from_metadata(self):
        provider = MetadataProvider(YUBICO_RESOLVER)
        cert = x509.load_der_x509_certificate(ATTESTATION_CERT,
                                              default_backend())
        attestation = provider.get_attestation(cert)
        assert attestation.transports == Transport.USB