# coding=utf-8

# Copyright (c) 2013 Yubico AB
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#
#   Redistribution and use in source and binary forms, with or
#   without modification, are permitted provided that the following
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#
#    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.

import unittest
from unittest import mock
from fido2 import cbor
from fido2.utils import sha256
from fido2.hid import CAPABILITY
from fido2.ctap import CtapError
from fido2.ctap1 import RegistrationData
from fido2.ctap2 import Info, AttestationResponse
from fido2.client import ClientError, Fido2Client
from fido2.webauthn import (
    PublicKeyCredentialCreationOptions,
    AttestationObject,
    CollectedClientData,
)

APP_ID = "https://foo.example.com"
REG_DATA = RegistrationData(
    bytes.fromhex(
        "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"  # noqa E501
    )
)

rp = {"id": "example.com", "name": "Example RP"}
user = {"id": b"user_id", "name": "A. User"}
challenge = b"Y2hhbGxlbmdl"
_INFO_NO_PIN = bytes.fromhex(
    "a60182665532465f5632684649444f5f325f3002826375766d6b686d61632d7365637265740350f8a011f38c0a4d15800617111f9edc7d04a462726bf5627570f564706c6174f469636c69656e7450696ef4051904b0068101"  # noqa E501
)
_MC_RESP = bytes.fromhex(
    "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"  # noqa E501
)


class TestFido2Client(unittest.TestCase):
    def test_ctap1_info(self):
        dev = mock.Mock()
        dev.capabilities = 0
        client = Fido2Client(dev, APP_ID)
        self.assertEqual(client.info.versions, ["U2F_V2"])
        self.assertEqual(client.info.pin_uv_protocols, [])

    @mock.patch("fido2.client.Ctap2")
    def test_make_credential_wrong_app_id(self, PatchedCtap2):
        dev = mock.Mock()
        dev.capabilities = CAPABILITY.CBOR
        ctap2 = mock.MagicMock()
        ctap2.get_info.return_value = Info.from_dict(cbor.decode(_INFO_NO_PIN))
        PatchedCtap2.return_value = ctap2
        client = Fido2Client(dev, APP_ID)
        try:
            client.make_credential(
                PublicKeyCredentialCreationOptions(
                    {"id": "bar.example.com", "name": "Invalid RP"},
                    user,
                    challenge,
                    [{"type": "public-key", "alg": -7}],
                )
            )
            self.fail("make_credential did not raise error")
        except ClientError as e:
            self.assertEqual(e.code, ClientError.ERR.BAD_REQUEST)

    @mock.patch("fido2.client.Ctap2")
    def test_make_credential_existing_key(self, PatchedCtap2):
        dev = mock.Mock()
        dev.capabilities = CAPABILITY.CBOR
        ctap2 = mock.MagicMock()
        ctap2.get_info.return_value = Info.from_dict(cbor.decode(_INFO_NO_PIN))
        ctap2.info = ctap2.get_info()
        ctap2.make_credential.side_effect = CtapError(CtapError.ERR.CREDENTIAL_EXCLUDED)
        PatchedCtap2.return_value = ctap2
        client = Fido2Client(dev, APP_ID)

        try:
            client.make_credential(
                PublicKeyCredentialCreationOptions(
                    rp,
                    user,
                    challenge,
                    [{"type": "public-key", "alg": -7}],
                    authenticator_selection={"userVerification": "discouraged"},
                )
            )
            self.fail("make_credential did not raise error")
        except ClientError as e:
            self.assertEqual(e.code, ClientError.ERR.DEVICE_INELIGIBLE)

        ctap2.make_credential.assert_called_once()

    @mock.patch("fido2.client.Ctap2")
    def test_make_credential_ctap2(self, PatchedCtap2):
        dev = mock.Mock()
        dev.capabilities = CAPABILITY.CBOR
        ctap2 = mock.MagicMock()
        ctap2.get_info.return_value = Info.from_dict(cbor.decode(_INFO_NO_PIN))
        ctap2.info = ctap2.get_info()
        ctap2.make_credential.return_value = AttestationResponse.from_dict(
            cbor.decode(_MC_RESP)
        )
        PatchedCtap2.return_value = ctap2
        client = Fido2Client(dev, APP_ID)

        response = client.make_credential(
            PublicKeyCredentialCreationOptions(
                rp,
                user,
                challenge,
                [{"type": "public-key", "alg": -7}],
                timeout=1000,
                authenticator_selection={"userVerification": "discouraged"},
            )
        )

        self.assertIsInstance(response.attestation_object, AttestationObject)
        self.assertIsInstance(response.client_data, CollectedClientData)

        ctap2.make_credential.assert_called_with(
            response.client_data.hash,
            rp,
            user,
            [{"type": "public-key", "alg": -7}],
            None,
            None,
            None,
            None,
            None,
            None,
            event=mock.ANY,
            on_keepalive=mock.ANY,
        )

        self.assertEqual(response.client_data.origin, APP_ID)
        self.assertEqual(response.client_data.type, "webauthn.create")
        self.assertEqual(response.client_data.challenge, challenge)

    def test_make_credential_ctap1(self):
        dev = mock.Mock()
        dev.capabilities = 0  # No CTAP2
        client = Fido2Client(dev, APP_ID)

        ctap1_mock = mock.MagicMock()
        ctap1_mock.get_version.return_value = "U2F_V2"
        ctap1_mock.register.return_value = REG_DATA
        client._backend.ctap1 = ctap1_mock

        response = client.make_credential(
            PublicKeyCredentialCreationOptions(
                rp, user, challenge, [{"type": "public-key", "alg": -7}]
            )
        )

        self.assertIsInstance(response.attestation_object, AttestationObject)
        self.assertIsInstance(response.client_data, CollectedClientData)
        client_data = response.client_data

        ctap1_mock.register.assert_called_with(
            client_data.hash, sha256(rp["id"].encode())
        )

        self.assertEqual(client_data.origin, APP_ID)
        self.assertEqual(client_data.type, "webauthn.create")
        self.assertEqual(client_data.challenge, challenge)

        self.assertEqual(response.attestation_object.fmt, "fido-u2f")