"""Tests for certbot._internal.client."""
import contextlib
import datetime
import platform
import shutil
import sys
import tempfile
import unittest
from unittest import mock
from unittest.mock import MagicMock

from josepy import interfaces
import pytest

from certbot import errors
from certbot import util
from certbot._internal import account
from certbot._internal import constants
from certbot._internal import san
from certbot._internal.display import obj as display_obj
from certbot.compat import os
import certbot.tests.util as test_util

KEY = test_util.load_vector("rsa512_key.pem")
CSR_SAN = test_util.load_vector("csr-san_512.pem")

# pylint: disable=line-too-long


class DetermineUserAgentTest(test_util.ConfigTestCase):
    """Tests for certbot._internal.client.determine_user_agent."""

    def _call(self):
        from certbot._internal.client import determine_user_agent
        return determine_user_agent(self.config)

    @mock.patch.dict(os.environ, {"CERTBOT_DOCS": "1"})
    def test_docs_value(self):
        self._test(expect_doc_values=True)

    @mock.patch.dict(os.environ, {})
    def test_real_values(self):
        self._test(expect_doc_values=False)

    def _test(self, expect_doc_values):
        ua = self._call()

        if expect_doc_values:
            doc_value_check = self.assertIn
            real_value_check = self.assertNotIn
        else:
            doc_value_check = self.assertNotIn
            real_value_check = self.assertIn

        doc_value_check("OS_NAME OS_VERSION", ua)
        doc_value_check("major.minor.patchlevel", ua)
        real_value_check(util.get_os_info_ua(), ua)
        real_value_check(platform.python_version(), ua)


class RegisterTest(test_util.ConfigTestCase):
    """Tests for certbot._internal.client.register."""

    def setUp(self):
        super().setUp()
        self.config.rsa_key_size = 1024
        self.config.register_unsafely_without_email = False
        self.config.email = "alias@example.com"
        self.account_storage = account.AccountMemoryStorage()
        self.tos_cb = mock.MagicMock()
        display_obj.set_display(MagicMock())

    def _call(self):
        from certbot._internal.client import register
        return register(self.config, self.account_storage, self.tos_cb)

    @staticmethod
    def _public_key_mock():
        m = mock.Mock(__class__=interfaces.JSONDeSerializable)
        m.to_partial_json.return_value = '{"a": 1}'
        return m

    @staticmethod
    def _new_acct_dir_mock():
        return "/acme/new-account"

    @staticmethod
    def _true_mock():
        return True

    @staticmethod
    def _false_mock():
        return False

    @staticmethod
    @contextlib.contextmanager
    def _patched_acme_client():
        with mock.patch('certbot._internal.client.acme_client') as mock_acme_client:
            yield mock_acme_client.ClientV2

    def test_no_tos(self):
        with self._patched_acme_client() as mock_client:
            mock_client.new_account().terms_of_service = "http://tos"
            mock_client().external_account_required.side_effect = self._false_mock
            with mock.patch("certbot._internal.eff.prepare_subscription") as mock_prepare:
                mock_client().new_account.side_effect = errors.Error
                with pytest.raises(errors.Error):
                    self._call()
                assert mock_prepare.called is False

                mock_client().new_account.side_effect = None
                self._call()
                assert mock_prepare.called is True

    @mock.patch('certbot._internal.eff.prepare_subscription')
    def test_empty_meta(self, unused_mock_prepare):
        # Test that we can handle an ACME server which does not implement the 'meta'
        # directory object (for terms-of-service handling).
        with self._patched_acme_client() as mock_client:
            from acme.messages import Directory
            mock_client().directory = Directory.from_json({})

            mock_client().external_account_required.side_effect = self._false_mock

            self._call()
            assert self.tos_cb.called is False

    @test_util.patch_display_util()
    def test_it(self, unused_mock_get_utility):
        with self._patched_acme_client() as mock_client:
            mock_client().external_account_required.side_effect = self._false_mock
            with mock.patch("certbot._internal.eff.handle_subscription"):
                self._call()
            assert self.tos_cb.called is True

    @mock.patch("certbot._internal.client.display_ops.get_email")
    def test_email_retry(self, mock_get_email):
        from acme import messages
        self.config.noninteractive_mode = False
        msg = "DNS problem: NXDOMAIN looking up MX for example.com"
        mx_err = messages.Error.with_code('invalidContact', detail=msg)
        with self._patched_acme_client() as mock_client:
            mock_client().external_account_required.side_effect = self._false_mock
            with mock.patch("certbot._internal.eff.prepare_subscription") as mock_prepare:
                mock_client().new_account.side_effect = [mx_err, mock.MagicMock()]
                self._call()
                assert mock_get_email.call_count == 1
                assert mock_prepare.called is True

    def test_email_invalid_noninteractive(self):
        from acme import messages
        self.config.noninteractive_mode = True
        msg = "DNS problem: NXDOMAIN looking up MX for example.com"
        mx_err = messages.Error.with_code('invalidContact', detail=msg)
        with self._patched_acme_client() as mock_client:
            mock_client().external_account_required.side_effect = self._false_mock
            with mock.patch("certbot._internal.eff.handle_subscription"):
                mock_client().new_account.side_effect = [mx_err, mock.MagicMock()]
                with pytest.raises(errors.Error):
                    self._call()

    def test_no_email_is_chill(self):
        self.config.email = None
        with self._patched_acme_client() as mock_client:
            mock_client().external_account_required.side_effect = self._false_mock
            self._call()

    @mock.patch("certbot._internal.client.logger")
    def test_without_email(self, mock_logger):
        with mock.patch("certbot._internal.eff.prepare_subscription") as mock_prepare:
            with self._patched_acme_client() as mock_client:
                mock_client().external_account_required.side_effect = self._false_mock
                self.config.email = None
                self.config.register_unsafely_without_email = True
                self.config.dry_run = False
                self._call()
                assert mock_prepare.called is True

    @mock.patch("certbot._internal.client.display_ops.get_email")
    def test_dry_run_no_staging_account(self, mock_get_email):
        """Tests dry-run for no staging account, expect account created with no email"""
        with self._patched_acme_client() as mock_client:
            mock_client().external_account_required.side_effect = self._false_mock
            with mock.patch("certbot._internal.eff.handle_subscription"):
                self.config.dry_run = True
                self._call()
                # check Certbot did not ask the user to provide an email
                assert mock_get_email.called is False
                # check Certbot created an account with no email. Contact should return empty
                assert not mock_client().new_account.call_args[0][0].contact

    @test_util.patch_display_util()
    def test_with_eab_arguments(self, unused_mock_get_utility):
        with self._patched_acme_client() as mock_client:
            mock_client().client.directory.__getitem__ = mock.Mock(
                side_effect=self._new_acct_dir_mock
            )
            mock_client().external_account_required.side_effect = self._false_mock
            with mock.patch("certbot._internal.eff.handle_subscription"):
                target = "certbot._internal.client.messages.ExternalAccountBinding.from_data"
                with mock.patch(target) as mock_eab_from_data:
                    self.config.eab_kid = "test-kid"
                    self.config.eab_hmac_key = "J2OAqW4MHXsrHVa_PVg0Y-L_R4SYw0_aL1le6mfblbE"
                    self._call()

                    assert mock_eab_from_data.called is True

    @test_util.patch_display_util()
    def test_without_eab_arguments(self, unused_mock_get_utility):
        with self._patched_acme_client() as mock_client:
            mock_client().external_account_required.side_effect = self._false_mock
            with mock.patch("certbot._internal.eff.handle_subscription"):
                target = "certbot._internal.client.messages.ExternalAccountBinding.from_data"
                with mock.patch(target) as mock_eab_from_data:
                    self.config.eab_kid = None
                    self.config.eab_hmac_key = None
                    self._call()

                    assert mock_eab_from_data.called is False

    def test_external_account_required_without_eab_arguments(self):
        with self._patched_acme_client() as mock_client:
            mock_client().client.net.key.public_key = mock.Mock(side_effect=self._public_key_mock)
            mock_client().external_account_required.side_effect = self._true_mock
            with mock.patch("certbot._internal.eff.handle_subscription"):
                with mock.patch("certbot._internal.client.messages.ExternalAccountBinding.from_data"):
                    self.config.eab_kid = None
                    self.config.eab_hmac_key = None

                    with pytest.raises(errors.Error):
                        self._call()

    def test_unsupported_error(self):
        from acme import messages
        msg = "Test"
        mx_err = messages.Error.with_code("malformed", detail=msg, title="title")
        with self._patched_acme_client() as mock_client:
            mock_client().client.directory.__getitem__ = mock.Mock(
                side_effect=self._new_acct_dir_mock
            )
            mock_client().external_account_required.side_effect = self._false_mock
            with mock.patch("certbot._internal.eff.handle_subscription") as mock_handle:
                mock_client().new_account.side_effect = [mx_err, mock.MagicMock()]
                with pytest.raises(messages.Error):
                    self._call()
        assert mock_handle.called is False


class ClientTestCommon(test_util.ConfigTestCase):
    """Common base class for certbot._internal.client.Client tests."""

    def setUp(self):
        super().setUp()
        self.config.no_verify_ssl = False
        self.config.allow_subset_of_names = False

        self.account = mock.MagicMock(**{"key.pem": KEY})

        from certbot._internal.client import Client
        with mock.patch("certbot._internal.client.acme_client") as acme:
            self.acme_client = acme.ClientV2
            self.acme = self.acme_client.return_value = mock.MagicMock()
            self.client_network = acme.ClientNetwork
            self.client = Client(
                config=self.config, account_=self.account,
                auth=None, installer=None)


class ClientTest(ClientTestCommon):
    """Tests for certbot._internal.client.Client."""

    def setUp(self):
        super().setUp()

        self.config.allow_subset_of_names = False
        self.config.dry_run = False
        self.config.strict_permissions = True
        self.eg_domains = ["example.com", "www.example.com"]
        self.eg_sans = list(map(san.DNSName, self.eg_domains))
        self.eg_order = mock.MagicMock(
            authorizations=[None],
            csr_pem=mock.sentinel.csr_pem)

    def test_init_acme_verify_ssl(self):
        assert self.client_network.call_args[1]['verify_ssl'] is True

    def _mock_obtain_certificate(self):
        self.client.auth_handler = mock.MagicMock()
        self.client.auth_handler.handle_authorizations.return_value = [None]
        self.client.auth_handler.deactivate_valid_authorizations.return_value = ([], [])
        self.acme.finalize_order.return_value = self.eg_order
        self.acme.new_order.return_value = self.eg_order
        self.eg_order.update.return_value = self.eg_order

    def _check_obtain_certificate(self, auth_count=1):
        if auth_count == 1:
            self.client.auth_handler.handle_authorizations.assert_called_once_with(
                self.eg_order,
                self.config,
                self.config.allow_subset_of_names)
        else:
            assert self.client.auth_handler.handle_authorizations.call_count == auth_count

        self.acme.finalize_order.assert_called_once_with(
            self.eg_order, mock.ANY,
            fetch_alternative_chains=self.config.preferred_chain is not None)

    @mock.patch("certbot._internal.client.crypto_util")
    @mock.patch("certbot._internal.client.logger")
    def test_obtain_certificate_from_csr(self, mock_logger, mock_crypto_util):
        self._mock_obtain_certificate()
        test_csr = util.CSR(form="pem", file=None, data=CSR_SAN)
        auth_handler = self.client.auth_handler
        self._set_mock_from_fullchain(mock_crypto_util.cert_and_chain_from_fullchain)

        orderr = self.acme.new_order(test_csr.data)
        auth_handler.handle_authorizations(orderr, self.config, False)
        assert (mock.sentinel.cert, mock.sentinel.chain) == \
            self.client.obtain_certificate_from_csr(
                test_csr,
                orderr=orderr)
        mock_crypto_util.find_chain_with_issuer.assert_not_called()
        # and that the cert was obtained correctly
        self._check_obtain_certificate()

        # Test that --preferred-chain results in chain selection
        self.config.preferred_chain = "some issuer"
        assert (mock.sentinel.cert, mock.sentinel.chain) == \
            self.client.obtain_certificate_from_csr(
                test_csr,
                orderr=orderr)
        mock_crypto_util.find_chain_with_issuer.assert_called_once_with(
            [orderr.fullchain_pem] + orderr.alternative_fullchains_pem,
            "some issuer", True)
        self.config.preferred_chain = None

        # Test for default issuance_timeout
        expected_deadline = \
            datetime.datetime.now() + datetime.timedelta(
                seconds=constants.CLI_DEFAULTS["issuance_timeout"])
        self.client.obtain_certificate_from_csr(test_csr, orderr=orderr)
        ((_, deadline), _) = self.client.acme.finalize_order.call_args
        assert abs(expected_deadline - deadline) <= datetime.timedelta(seconds=1)

        # Test for specific issuance_timeout (300 seconds)
        expected_deadline = \
            datetime.datetime.now() + datetime.timedelta(seconds=300)
        self.config.issuance_timeout = 300
        self.client.obtain_certificate_from_csr(test_csr, orderr=orderr)
        ((_, deadline), _) = self.client.acme.finalize_order.call_args
        assert abs(expected_deadline - deadline) <= datetime.timedelta(seconds=1)

        # Test for orderr=None
        assert (mock.sentinel.cert, mock.sentinel.chain) == \
            self.client.obtain_certificate_from_csr(
                test_csr,
                orderr=None)
        auth_handler.handle_authorizations.assert_called_with(self.eg_order, self.config, False)

        # Test for no auth_handler
        self.client.auth_handler = None
        with pytest.raises(errors.Error):
            self.client.obtain_certificate_from_csr(test_csr)
        mock_logger.error.assert_called_once_with(mock.ANY)

    @mock.patch("certbot._internal.client.crypto_util")
    def test_obtain_certificate(self, mock_crypto_util):
        csr = util.CSR(form="pem", file=None, data=CSR_SAN)
        mock_crypto_util.generate_csr.return_value = csr
        mock_crypto_util.generate_key.return_value = mock.sentinel.key
        self._set_mock_from_fullchain(mock_crypto_util.cert_and_chain_from_fullchain)

        self._test_obtain_certificate_common(mock.sentinel.key, csr)

        mock_crypto_util.generate_key.assert_called_once_with(
            key_size=self.config.rsa_key_size,
            key_dir=None,
            key_type=self.config.key_type,
            elliptic_curve="secp256r1",
            strict_permissions=True,
        )
        mock_crypto_util.generate_csr.assert_called_once_with(
            mock.sentinel.key, self.eg_domains, None, False, True, ipaddrs=[])
        mock_crypto_util.cert_and_chain_from_fullchain.assert_called_once_with(
            self.eg_order.fullchain_pem)

    @mock.patch("certbot._internal.client.crypto_util")
    def test_obtain_certificate_no_profile_preference(self, mock_crypto_util):
        csr = util.CSR(form="pem", file=None, data=CSR_SAN)
        mock_crypto_util.generate_csr.return_value = csr
        mock_crypto_util.generate_key.return_value = mock.sentinel.key
        self._set_mock_from_fullchain(mock_crypto_util.cert_and_chain_from_fullchain)

        self.client.config.required_profile = None
        self.client.config.preferred_profile = None

        self._test_obtain_certificate_common(mock.sentinel.key, csr)
        self.acme.new_order.assert_called_once_with(mock.ANY, profile=None)

    @mock.patch("certbot._internal.client.crypto_util")
    def test_obtain_certificate_required_profile(self, mock_crypto_util):
        csr = util.CSR(form="pem", file=None, data=CSR_SAN)
        mock_crypto_util.generate_csr.return_value = csr
        mock_crypto_util.generate_key.return_value = mock.sentinel.key
        self._set_mock_from_fullchain(mock_crypto_util.cert_and_chain_from_fullchain)

        self.client.config.required_profile = "exampleProfile"
        self.client.config.preferred_profile = None

        self._test_obtain_certificate_common(mock.sentinel.key, csr)
        self.acme.new_order.assert_called_once_with(mock.ANY, profile="exampleProfile")

    @mock.patch("certbot._internal.client.crypto_util")
    def test_obtain_certificate_preferred_profile_exists(self, mock_crypto_util):
        csr = util.CSR(form="pem", file=None, data=CSR_SAN)
        mock_crypto_util.generate_csr.return_value = csr
        mock_crypto_util.generate_key.return_value = mock.sentinel.key
        self._set_mock_from_fullchain(mock_crypto_util.cert_and_chain_from_fullchain)

        self.client.config.required_profile = None
        self.client.config.preferred_profile = "exampleProfile"

        from acme.messages import Directory
        self.acme.directory = Directory.from_json({
            'meta': {
                'profiles': {
                    'exampleProfile': 'here is some descriptive text, very informative',
                }
            }
        })

        self._test_obtain_certificate_common(mock.sentinel.key, csr)
        self.acme.new_order.assert_called_once_with(mock.ANY, profile="exampleProfile")

    @mock.patch("certbot._internal.client.crypto_util")
    def test_obtain_certificate_preferred_profile_does_not_exist(self, mock_crypto_util):
        csr = util.CSR(form="pem", file=None, data=CSR_SAN)
        mock_crypto_util.generate_csr.return_value = csr
        mock_crypto_util.generate_key.return_value = mock.sentinel.key
        self._set_mock_from_fullchain(mock_crypto_util.cert_and_chain_from_fullchain)

        self.client.config.required_profile = None
        self.client.config.preferred_profile = "thisProfileDoesNotExist"

        from acme.messages import Directory
        self.acme.directory = Directory.from_json({
            'meta': {
                'profiles': {
                    'example': 'profiles!',
                }
            }
        })

        self._test_obtain_certificate_common(mock.sentinel.key, csr)
        self.acme.new_order.assert_called_once_with(mock.ANY, profile=None)

    @mock.patch("certbot._internal.client.crypto_util")
    def test_obtain_certificate_preferred_profile_no_profiles_exist(self, mock_crypto_util):
        csr = util.CSR(form="pem", file=None, data=CSR_SAN)
        mock_crypto_util.generate_csr.return_value = csr
        mock_crypto_util.generate_key.return_value = mock.sentinel.key
        self._set_mock_from_fullchain(mock_crypto_util.cert_and_chain_from_fullchain)

        self.client.config.required_profile = None
        self.client.config.preferred_profile = "thisProfileDoesNotExist"

        from acme.messages import Directory
        self.acme.directory = Directory.from_json({})

        self._test_obtain_certificate_common(mock.sentinel.key, csr)
        self.acme.new_order.assert_called_once_with(mock.ANY, profile=None)

    @mock.patch("certbot._internal.client.crypto_util")
    def test_obtain_certificate_partial_success(self, mock_crypto_util):
        csr = util.CSR(form="pem", file=mock.sentinel.csr_file, data=CSR_SAN)
        key = util.CSR(form="pem", file=mock.sentinel.key_file, data=CSR_SAN)
        mock_crypto_util.generate_csr.return_value = csr
        mock_crypto_util.generate_key.return_value = key
        self._set_mock_from_fullchain(mock_crypto_util.cert_and_chain_from_fullchain)

        authzr = (self._authzr_from_sans([san.DNSName("example.com")]))
        self.config.allow_subset_of_names = True
        self._test_obtain_certificate_common(key, csr, authzr_ret=authzr, auth_count=2)

        assert mock_crypto_util.generate_key.call_count == 2
        assert mock_crypto_util.generate_csr.call_count == 2
        assert mock_crypto_util.cert_and_chain_from_fullchain.call_count == 1

    @mock.patch("certbot._internal.client.crypto_util")
    def test_obtain_certificate_finalize_order_partial_success(self, mock_crypto_util):
        from acme import messages
        csr = util.CSR(form="pem", file=mock.sentinel.csr_file, data=CSR_SAN)
        key = util.CSR(form="pem", file=mock.sentinel.key_file, data=CSR_SAN)
        mock_crypto_util.generate_csr.return_value = csr
        mock_crypto_util.generate_key.return_value = key
        self._set_mock_from_fullchain(mock_crypto_util.cert_and_chain_from_fullchain)

        self._mock_obtain_certificate()
        authzr = self._authzr_from_sans(self.eg_sans)
        self.eg_order.authorizations = authzr
        self.client.auth_handler.handle_authorizations.return_value = authzr

        identifier = messages.Identifier(typ=messages.IDENTIFIER_FQDN, value='example.com')
        subproblem = messages.Error.with_code('caa', detail='bar', title='title', identifier=identifier)
        error_with_subproblems = messages.Error.with_code('malformed', detail='foo', title='title', subproblems=[subproblem])
        self.client.acme.finalize_order.side_effect = [error_with_subproblems, mock.DEFAULT]

        self.config.allow_subset_of_names = True

        with test_util.patch_display_util():
            result = self.client.obtain_certificate(self.eg_sans)

        assert result == \
            (mock.sentinel.cert, mock.sentinel.chain, key, csr)
        assert self.client.auth_handler.handle_authorizations.call_count == 2
        assert self.acme.finalize_order.call_count == 2

        assert mock_crypto_util.generate_key.call_count == 2
        successful_domains = [d for d in self.eg_domains if d != 'example.com']
        mock_crypto_util.generate_csr.assert_has_calls([
            mock.call(key, self.eg_domains, None, self.config.must_staple, self.config.strict_permissions, ipaddrs=[]),
            mock.call(key, successful_domains, None, self.config.must_staple, self.config.strict_permissions, ipaddrs=[])])
        assert mock_crypto_util.cert_and_chain_from_fullchain.call_count == 1

    @mock.patch("certbot._internal.client.crypto_util")
    def test_obtain_certificate_finalize_order_no_retryable_domains(self, mock_crypto_util):
        from acme import messages
        csr = util.CSR(form="pem", file=mock.sentinel.csr_file, data=CSR_SAN)
        key = util.CSR(form="pem", file=mock.sentinel.key_file, data=CSR_SAN)
        mock_crypto_util.generate_csr.return_value = csr
        mock_crypto_util.generate_key.return_value = key
        self._set_mock_from_fullchain(mock_crypto_util.cert_and_chain_from_fullchain)

        self._mock_obtain_certificate()
        authzr = self._authzr_from_sans(self.eg_sans)
        self.eg_order.authorizations = authzr
        self.client.auth_handler.handle_authorizations.return_value = authzr

        identifier1 = messages.Identifier(typ=messages.IDENTIFIER_FQDN, value='example.com')
        identifier2 = messages.Identifier(typ=messages.IDENTIFIER_FQDN, value='www.example.com')
        subproblem1 = messages.Error.with_code('caa', detail='bar', title='title', identifier=identifier1)
        subproblem2 = messages.Error.with_code('caa', detail='bar', title='title', identifier=identifier2)
        error_with_subproblems = messages.Error.with_code('malformed', detail='foo', title='title', subproblems=[subproblem1, subproblem2])
        self.client.acme.finalize_order.side_effect = error_with_subproblems

        self.config.allow_subset_of_names = True

        with pytest.raises(messages.Error):
            self.client.obtain_certificate(self.eg_sans)
        assert self.client.auth_handler.handle_authorizations.call_count == 1
        assert self.acme.finalize_order.call_count == 1
        assert mock_crypto_util.generate_key.call_count == 1
        assert mock_crypto_util.cert_and_chain_from_fullchain.call_count == 0

    @mock.patch("certbot._internal.client.crypto_util")
    def test_obtain_certificate_finalize_order_rejected_identifier_no_subproblems(self, mock_crypto_util):
        from acme import messages
        csr = util.CSR(form="pem", file=mock.sentinel.csr_file, data=CSR_SAN)
        key = util.CSR(form="pem", file=mock.sentinel.key_file, data=CSR_SAN)
        mock_crypto_util.generate_csr.return_value = csr
        mock_crypto_util.generate_key.return_value = key
        self._set_mock_from_fullchain(mock_crypto_util.cert_and_chain_from_fullchain)

        self._mock_obtain_certificate()
        authzr = self._authzr_from_sans(self.eg_sans)
        self.eg_order.authorizations = authzr
        self.client.auth_handler.handle_authorizations.return_value = authzr

        error = messages.Error.with_code('caa', detail='foo', title='title')
        self.client.acme.finalize_order.side_effect = error

        self.config.allow_subset_of_names = True

        with pytest.raises(messages.Error):
            self.client.obtain_certificate(self.eg_sans)
        assert self.client.auth_handler.handle_authorizations.call_count == 1
        assert self.acme.finalize_order.call_count == 1
        assert mock_crypto_util.generate_key.call_count == 1
        assert mock_crypto_util.cert_and_chain_from_fullchain.call_count == 0

    @mock.patch("certbot._internal.client.crypto_util")
    def test_obtain_certificate_get_order_partial_success(self, mock_crypto_util):
        from acme import messages
        csr = util.CSR(form="pem", file=mock.sentinel.csr_file, data=CSR_SAN)
        key = util.CSR(form="pem", file=mock.sentinel.key_file, data=CSR_SAN)
        mock_crypto_util.generate_csr.return_value = csr
        mock_crypto_util.generate_key.return_value = key
        self._set_mock_from_fullchain(mock_crypto_util.cert_and_chain_from_fullchain)

        self._mock_obtain_certificate()
        authzr = self._authzr_from_sans(self.eg_sans)
        self.eg_order.authorizations = authzr
        self.client.auth_handler.handle_authorizations.return_value = authzr

        identifier = messages.Identifier(typ=messages.IDENTIFIER_FQDN, value='example.com')
        subproblem = messages.Error.with_code('caa', detail='bar', title='title', identifier=identifier)
        error_with_subproblems = messages.Error.with_code('malformed', detail='foo', title='title', subproblems=[subproblem])
        self.client.acme.new_order.side_effect = [error_with_subproblems, mock.DEFAULT]

        self.config.allow_subset_of_names = True

        with test_util.patch_display_util():
            result = self.client.obtain_certificate(self.eg_sans)

        assert result == \
            (mock.sentinel.cert, mock.sentinel.chain, key, csr)
        assert self.client.auth_handler.handle_authorizations.call_count == 1
        assert self.acme.new_order.call_count == 2

        successful_domains = [d for d in self.eg_domains if d != 'example.com']
        assert mock_crypto_util.generate_key.call_count == 2
        mock_crypto_util.generate_csr.assert_has_calls([
            mock.call(key, self.eg_domains, None, self.config.must_staple, self.config.strict_permissions, ipaddrs=[]),
            mock.call(key, successful_domains, None, self.config.must_staple, self.config.strict_permissions, ipaddrs=[])])
        assert mock_crypto_util.cert_and_chain_from_fullchain.call_count == 1

    @mock.patch("certbot._internal.client.crypto_util")
    def test_obtain_certificate_get_order_no_retryable_domains(self, mock_crypto_util):
        from acme import messages
        csr = util.CSR(form="pem", file=mock.sentinel.csr_file, data=CSR_SAN)
        key = util.CSR(form="pem", file=mock.sentinel.key_file, data=CSR_SAN)
        mock_crypto_util.generate_csr.return_value = csr
        mock_crypto_util.generate_key.return_value = key
        self._set_mock_from_fullchain(mock_crypto_util.cert_and_chain_from_fullchain)

        self._mock_obtain_certificate()
        authzr = self._authzr_from_sans(self.eg_sans)
        self.eg_order.authorizations = authzr
        self.client.auth_handler.handle_authorizations.return_value = authzr

        identifier1 = messages.Identifier(typ=messages.IDENTIFIER_FQDN, value='example.com')
        identifier2 = messages.Identifier(typ=messages.IDENTIFIER_FQDN, value='www.example.com')
        subproblem1 = messages.Error.with_code('caa', detail='bar', title='title', identifier=identifier1)
        subproblem2 = messages.Error.with_code('caa', detail='bar', title='title', identifier=identifier2)
        error_with_subproblems = messages.Error.with_code('malformed', detail='foo', title='title', subproblems=[subproblem1, subproblem2])
        self.client.acme.new_order.side_effect = error_with_subproblems

        self.config.allow_subset_of_names = True

        with pytest.raises(messages.Error):
            self.client.obtain_certificate(self.eg_sans)
        assert self.client.auth_handler.handle_authorizations.call_count == 0
        assert self.acme.new_order.call_count == 1
        assert mock_crypto_util.generate_key.call_count == 1
        assert mock_crypto_util.cert_and_chain_from_fullchain.call_count == 0

    @mock.patch("certbot._internal.client.crypto_util")
    def test_obtain_certificate_get_order_rejected_identifier_no_subproblems(self, mock_crypto_util):
        from acme import messages
        csr = util.CSR(form="pem", file=mock.sentinel.csr_file, data=CSR_SAN)
        key = util.CSR(form="pem", file=mock.sentinel.key_file, data=CSR_SAN)
        mock_crypto_util.generate_csr.return_value = csr
        mock_crypto_util.generate_key.return_value = key
        self._set_mock_from_fullchain(mock_crypto_util.cert_and_chain_from_fullchain)

        self._mock_obtain_certificate()
        authzr = self._authzr_from_sans(self.eg_sans)
        self.eg_order.authorizations = authzr
        self.client.auth_handler.handle_authorizations.return_value = authzr

        error = messages.Error.with_code('caa', detail='foo', title='title')
        self.client.acme.new_order.side_effect = error

        self.config.allow_subset_of_names = True

        with pytest.raises(messages.Error):
            self.client.obtain_certificate(self.eg_sans)
        assert self.client.auth_handler.handle_authorizations.call_count == 0
        assert self.acme.new_order.call_count == 1
        assert mock_crypto_util.generate_key.call_count == 1
        assert mock_crypto_util.cert_and_chain_from_fullchain.call_count == 0

    @mock.patch("certbot._internal.client.crypto_util")
    @mock.patch("certbot._internal.client.acme_crypto_util")
    def test_obtain_certificate_dry_run(self, mock_acme_crypto, mock_crypto):
        csr = util.CSR(form="pem", file=None, data=CSR_SAN)
        mock_acme_crypto.make_csr.return_value = CSR_SAN
        mock_crypto.make_key.return_value = mock.sentinel.key_pem
        key = util.Key(file=None, pem=mock.sentinel.key_pem)
        self._set_mock_from_fullchain(mock_crypto.cert_and_chain_from_fullchain)

        self.client.config.dry_run = True
        self._test_obtain_certificate_common(key, csr)

        mock_crypto.make_key.assert_called_once_with(
            bits=self.config.rsa_key_size,
            elliptic_curve="secp256r1",
            key_type=self.config.key_type,
        )
        # Assumes all of eg_sans are DNSNames.
        eg_domains = list(map(str, self.eg_sans))
        mock_acme_crypto.make_csr.assert_called_once_with(
            mock.sentinel.key_pem, eg_domains, self.config.must_staple, ipaddrs=[])
        mock_crypto.generate_key.assert_not_called()
        mock_crypto.generate_csr.assert_not_called()
        assert mock_crypto.cert_and_chain_from_fullchain.call_count == 1

    @mock.patch("certbot._internal.client.logger")
    @mock.patch("certbot._internal.client.crypto_util")
    @mock.patch("certbot._internal.client.acme_crypto_util")
    def test_obtain_certificate_dry_run_authz_deactivations_failed(self, mock_acme_crypto,
                                                                   mock_crypto, mock_log):
        from acme import messages
        csr = util.CSR(form="pem", file=None, data=CSR_SAN)
        mock_acme_crypto.make_csr.return_value = CSR_SAN
        mock_crypto.make_key.return_value = mock.sentinel.key_pem
        key = util.Key(file=None, pem=mock.sentinel.key_pem)
        self._set_mock_from_fullchain(mock_crypto.cert_and_chain_from_fullchain)

        self._mock_obtain_certificate()
        self.client.config.dry_run = True

        # Two authzs that are already valid and should get deactivated (dry run)
        authzrs = self._authzr_from_sans([san.DNSName("example.com"), san.DNSName("www.example.com")])
        for authzr in authzrs:
            authzr.body.status = messages.STATUS_VALID

        # One deactivation succeeds, one fails
        auth_handler = self.client.auth_handler
        auth_handler.deactivate_valid_authorizations.return_value = ([authzrs[0]], [authzrs[1]])

        # Certificate should get issued despite one failed deactivation
        self.eg_order.authorizations = authzrs
        self.client.auth_handler.handle_authorizations.return_value = authzrs
        with test_util.patch_display_util():
            result = self.client.obtain_certificate(self.eg_sans)
        assert result == (mock.sentinel.cert, mock.sentinel.chain, key, csr)
        self._check_obtain_certificate(1)

        # Deactivation success/failure should have been handled properly
        assert auth_handler.deactivate_valid_authorizations.call_count == 1, \
                        "Deactivate authorizations should be called"
        assert self.acme.new_order.call_count == 2, \
                        "Order should be recreated due to successfully deactivated authorizations"
        mock_log.warning.assert_called_with("Certbot was unable to obtain fresh authorizations for"
                                            " every domain. The dry run will continue, but results"
                                            " may not be accurate.")

    @mock.patch("certbot._internal.client.crypto_util")
    def test_obtain_certificate_reuse_key_with_allow_subset_of_names(self, mock_crypto_util):
        csr = util.CSR(form="pem", file=mock.sentinel.csr_file, data=CSR_SAN)
        old_key = util.Key(file="old_key_file", pem="old_key_pem")
        new_key = util.Key(file="new_key_file", pem="new_key_pem")
        mock_crypto_util.generate_csr.return_value = csr
        mock_crypto_util.generate_key.return_value = new_key
        self._set_mock_from_fullchain(mock_crypto_util.cert_and_chain_from_fullchain)

        authzr = self._authzr_from_sans([san.DNSName("example.com")])
        self.config.allow_subset_of_names = True
        self.config.reuse_key = True

        self._mock_obtain_certificate()

        self.eg_order.authorizations = authzr
        self.client.auth_handler.handle_authorizations.return_value = authzr

        with test_util.patch_display_util():
            mocked_open = mock.mock_open(read_data="old_key_pem")
            with mock.patch('builtins.open', mocked_open):
                result = self.client.obtain_certificate(self.eg_sans, "old_key_file")

        assert result == \
            (mock.sentinel.cert, mock.sentinel.chain, old_key, csr)
        self._check_obtain_certificate(2)

        assert mock_crypto_util.generate_key.call_count == 0

    def _set_mock_from_fullchain(self, mock_from_fullchain):
        mock_cert = mock.Mock()
        mock_cert.encode.return_value = mock.sentinel.cert
        mock_chain = mock.Mock()
        mock_chain.encode.return_value = mock.sentinel.chain
        mock_from_fullchain.return_value = (mock_cert, mock_chain)

    def _authzr_from_sans(self, sans):
        authzr = []

        # domain ordering should not be affected by authorization order
        for s in reversed(sans):
            if type(s) is not san.DNSName:
                raise TypeError(f"expected DNSName but got {type(s)}")
            authzr.append(
                mock.MagicMock(
                    body=mock.MagicMock(
                        identifier=mock.MagicMock(
                            value=str(s),
                            typ="dns"))))
        return authzr

    def _test_obtain_certificate_common(self, key, csr, authzr_ret=None, auth_count=1):
        self._mock_obtain_certificate()

        # return_value is essentially set to (None, None) in
        # _mock_obtain_certificate(), which breaks this test.
        # Thus fixed by the next line.
        authzr = authzr_ret or self._authzr_from_sans(self.eg_sans)

        self.eg_order.authorizations = authzr
        self.client.auth_handler.handle_authorizations.return_value = authzr

        with test_util.patch_display_util():
            result = self.client.obtain_certificate(self.eg_sans)

        assert result == \
            (mock.sentinel.cert, mock.sentinel.chain, key, csr)
        self._check_obtain_certificate(auth_count)

    @mock.patch('certbot._internal.client.Client.obtain_certificate')
    @mock.patch('certbot._internal.storage.RenewableCert.new_lineage')
    def test_obtain_and_enroll_certificate(self,
                                           mock_storage, mock_obtain_certificate):
        sans = [san.DNSName("*.example.com"), san.DNSName("example.com")]
        mock_obtain_certificate.return_value = (mock.MagicMock(),
                                                mock.MagicMock(), mock.MagicMock(), None)

        self.client.config.dry_run = False
        assert self.client.obtain_and_enroll_certificate(sans, "example_cert")

        assert self.client.obtain_and_enroll_certificate(sans, None)
        assert self.client.obtain_and_enroll_certificate(sans[1:], None)

        self.client.config.dry_run = True

        assert not self.client.obtain_and_enroll_certificate(sans, None)

        names = [call[0][0] for call in mock_storage.call_args_list]
        assert names == ["example_cert", "example.com", "example.com"]

    @mock.patch("certbot._internal.cli.helpful_parser")
    def test_save_certificate(self, mock_parser):
        certs = ["cert_512.pem", "cert-san_512.pem"]
        tmp_path = tempfile.mkdtemp()

        cert_pem = test_util.load_vector(certs[0])
        chain_pem = (test_util.load_vector(certs[0]) + test_util.load_vector(certs[1]))
        candidate_cert_path = os.path.join(tmp_path, "certs", "cert_512.pem")
        candidate_chain_path = os.path.join(tmp_path, "chains", "chain.pem")
        candidate_fullchain_path = os.path.join(tmp_path, "chains", "fullchain.pem")
        mock_parser.verb = "certonly"
        mock_parser.args = ["--cert-path", candidate_cert_path,
                            "--chain-path", candidate_chain_path,
                            "--fullchain-path", candidate_fullchain_path]

        cert_path, chain_path, fullchain_path = self.client.save_certificate(
            cert_pem, chain_pem, candidate_cert_path, candidate_chain_path,
            candidate_fullchain_path)

        assert os.path.dirname(cert_path) == \
                         os.path.dirname(candidate_cert_path)
        assert os.path.dirname(chain_path) == \
                         os.path.dirname(candidate_chain_path)
        assert os.path.dirname(fullchain_path) == \
                         os.path.dirname(candidate_fullchain_path)

        with open(cert_path, "rb") as cert_file:
            cert_contents = cert_file.read()
        assert cert_contents == test_util.load_vector(certs[0])

        with open(chain_path, "rb") as chain_file:
            chain_contents = chain_file.read()
        assert chain_contents == test_util.load_vector(certs[0]) + \
                         test_util.load_vector(certs[1])

        shutil.rmtree(tmp_path)

    @test_util.patch_display_util()
    def test_deploy_certificate_success(self, mock_util):
        with pytest.raises(errors.Error):
            self.client.deploy_certificate([san.DNSName("foo.bar")], "key", "cert", "chain", "fullchain")

        installer = mock.MagicMock()
        self.client.installer = installer

        self.client.deploy_certificate([san.DNSName("foo.bar")], "key", "cert", "chain", "fullchain")
        installer.deploy_cert.assert_called_once_with(
            cert_path=os.path.abspath("cert"),
            chain_path=os.path.abspath("chain"),
            domain='foo.bar',
            fullchain_path='fullchain',
            key_path=os.path.abspath("key"))
        assert installer.save.call_count == 2
        installer.restart.assert_called_once_with()

    @mock.patch('certbot._internal.client.display_util.notify')
    @test_util.patch_display_util()
    def test_deploy_certificate_failure(self, mock_util, mock_notify):
        installer = mock.MagicMock()
        self.client.installer = installer
        self.config.installer = "foobar"

        installer.deploy_cert.side_effect = errors.PluginError
        with pytest.raises(errors.PluginError):
            self.client.deploy_certificate([san.DNSName("foo.bar")], "key", "cert", "chain", "fullchain")
        installer.recovery_routine.assert_called_once_with()

        mock_notify.assert_any_call('Deploying certificate')


    @test_util.patch_display_util()
    def test_deploy_certificate_save_failure(self, mock_util):
        installer = mock.MagicMock()
        self.client.installer = installer

        installer.save.side_effect = errors.PluginError
        with pytest.raises(errors.PluginError):
            self.client.deploy_certificate([san.DNSName("foo.bar")], "key", "cert", "chain", "fullchain")
        installer.recovery_routine.assert_called_once_with()

    @mock.patch('certbot._internal.client.display_util.notify')
    @test_util.patch_display_util()
    def test_deploy_certificate_restart_failure(self, mock_get_utility, mock_notify):
        installer = mock.MagicMock()
        installer.restart.side_effect = [errors.PluginError, None]
        self.client.installer = installer

        with pytest.raises(errors.PluginError):
            self.client.deploy_certificate([san.DNSName("foo.bar")], "key", "cert", "chain", "fullchain")
        mock_notify.assert_called_with(
            'We were unable to install your certificate, however, we successfully restored '
            'your server to its prior configuration.')
        installer.rollback_checkpoints.assert_called_once_with()
        assert installer.restart.call_count == 2

    @mock.patch('certbot._internal.client.logger')
    @test_util.patch_display_util()
    def test_deploy_certificate_restart_failure2(self, mock_get_utility, mock_logger):
        installer = mock.MagicMock()
        installer.restart.side_effect = errors.PluginError
        installer.rollback_checkpoints.side_effect = errors.ReverterError
        self.client.installer = installer

        with pytest.raises(errors.PluginError):
            self.client.deploy_certificate([san.DNSName("foo.bar")], "key", "cert", "chain", "fullchain")
        assert mock_logger.error.call_count == 1
        assert 'An error occurred and we failed to restore your config' in \
            mock_logger.error.call_args[0][0]
        installer.rollback_checkpoints.assert_called_once_with()
        assert installer.restart.call_count == 1

    def test_choose_lineage_name(self):
        sep = os.path.sep
        invalid_domains = [san.DNSName(f"exam{sep}ple.com")]
        valid_domains = [san.DNSName("example.com")]
        invalid_certname = f"foo{sep}.bar"
        valid_certname = "foo.bar"
        invalid_wildcard_domain = [san.DNSName(f"*.exam{sep}ple.com")]
        # Verify errors are raised when invalid lineagename is chosen.
        with pytest.raises(errors.Error):
            self.client._choose_lineagename(invalid_domains, None)
        with pytest.raises(errors.Error):
            self.client._choose_lineagename(invalid_domains, invalid_certname)
        with pytest.raises(errors.Error):
            self.client._choose_lineagename(valid_domains, invalid_certname)
        with pytest.raises(errors.Error):
            self.client._choose_lineagename(invalid_wildcard_domain, None)
        # Verify no error is raised when invalid domain is overridden by valid certname.
        self.client._choose_lineagename(invalid_domains, valid_certname)


class EnhanceConfigTest(ClientTestCommon):
    """Tests for certbot._internal.client.Client.enhance_config."""

    def setUp(self):
        super().setUp()

        self.config.hsts = False
        self.config.redirect = False
        self.config.staple = False
        self.config.uir = False
        self.domain = "example.org"

    def test_no_installer(self):
        with pytest.raises(errors.Error):
            self.client.enhance_config([san.DNSName(self.domain)], None)

    def test_unsupported(self):
        self.client.installer = mock.MagicMock()
        self.client.installer.supported_enhancements.return_value = []

        self.config.redirect = None
        self.config.hsts = True
        with mock.patch("certbot._internal.client.logger") as mock_logger:
            self.client.enhance_config([self.domain], None)
        assert mock_logger.error.call_count == 1
        self.client.installer.enhance.assert_not_called()

    @mock.patch("certbot._internal.client.logger")
    def test_already_exists_header(self, mock_log):
        self.config.hsts = True
        self._test_with_already_existing()
        assert mock_log.info.called is True
        assert mock_log.info.call_args[0][1] == \
                          'Strict-Transport-Security'

    @mock.patch("certbot._internal.client.logger")
    def test_already_exists_redirect(self, mock_log):
        self.config.redirect = True
        self._test_with_already_existing()
        assert mock_log.info.called is True
        assert mock_log.info.call_args[0][1] == \
                          'redirect'

    @mock.patch("certbot._internal.client.logger")
    def test_config_set_no_warning_redirect(self, mock_log):
        self.config.redirect = False
        self._test_with_already_existing()
        assert mock_log.warning.called is False

    @mock.patch("certbot._internal.client.logger")
    def test_no_warn_redirect(self, mock_log):
        self.config.redirect = None
        self._test_with_all_supported()
        assert mock_log.warning.called is False

    def test_no_ask_hsts(self):
        self.config.hsts = True
        self._test_with_all_supported()
        self.client.installer.enhance.assert_called_with(
            self.domain, "ensure-http-header", "Strict-Transport-Security")

    def test_no_ask_redirect(self):
        self.config.redirect = True
        self._test_with_all_supported()
        self.client.installer.enhance.assert_called_with(
            self.domain, "redirect", None)

    def test_no_ask_staple(self):
        self.config.staple = True
        self._test_with_all_supported()
        self.client.installer.enhance.assert_called_with(
            self.domain, "staple-ocsp", None)

    def test_no_ask_uir(self):
        self.config.uir = True
        self._test_with_all_supported()
        self.client.installer.enhance.assert_called_with(
            self.domain, "ensure-http-header", "Upgrade-Insecure-Requests")

    def test_enhance_failure(self):
        self.client.installer = mock.MagicMock()
        self.client.installer.enhance.side_effect = errors.PluginError
        self._test_error(enhance_error=True)
        self.client.installer.recovery_routine.assert_called_once_with()

    def test_save_failure(self):
        self.client.installer = mock.MagicMock()
        self.client.installer.save.side_effect = errors.PluginError
        self._test_error()
        self.client.installer.recovery_routine.assert_called_once_with()
        self.client.installer.save.assert_called_once_with(mock.ANY)

    def test_restart_failure(self):
        self.client.installer = mock.MagicMock()
        self.client.installer.restart.side_effect = [errors.PluginError, None]
        self._test_error_with_rollback()

    def test_restart_failure2(self):
        installer = mock.MagicMock()
        installer.restart.side_effect = errors.PluginError
        installer.rollback_checkpoints.side_effect = errors.ReverterError
        self.client.installer = installer
        self._test_error_with_rollback()

    def _test_error_with_rollback(self):
        self._test_error()
        assert self.client.installer.restart.called is True

    def _test_error(self, enhance_error=False, restart_error=False):
        self.config.redirect = True
        with mock.patch('certbot._internal.client.logger') as mock_logger, \
             test_util.patch_display_util():
            with pytest.raises(errors.PluginError):
                self._test_with_all_supported()

        if enhance_error:
            assert mock_logger.error.call_count == 1
            assert 'Unable to set the %s enhancement for %s.' == mock_logger.error.call_args_list[0][0][0]
        if restart_error:
            mock_logger.critical.assert_called_with(
                'Rolling back to previous server configuration...')

    def _test_with_all_supported(self):
        if self.client.installer is None:
            self.client.installer = mock.MagicMock()
        self.client.installer.supported_enhancements.return_value = [
            "ensure-http-header", "redirect", "staple-ocsp"]
        self.client.enhance_config([san.DNSName(self.domain)], None)
        assert self.client.installer.save.call_count == 1
        assert self.client.installer.restart.call_count == 1

    def _test_with_already_existing(self):
        self.client.installer = mock.MagicMock()
        self.client.installer.supported_enhancements.return_value = [
            "ensure-http-header", "redirect", "staple-ocsp"]
        self.client.installer.enhance.side_effect = errors.PluginEnhancementAlreadyPresent()
        self.client.enhance_config([san.DNSName(self.domain)], None)


class RollbackTest(unittest.TestCase):
    """Tests for certbot._internal.client.rollback."""

    def setUp(self):
        self.m_install = mock.MagicMock()

    @classmethod
    def _call(cls, checkpoints, side_effect):
        from certbot._internal.client import rollback
        with mock.patch("certbot._internal.client.plugin_selection.pick_installer") as mpi:
            mpi.side_effect = side_effect
            rollback(None, checkpoints, {}, mock.MagicMock())

    def test_no_problems(self):
        self._call(1, self.m_install)
        assert self.m_install().rollback_checkpoints.call_count == 1
        assert self.m_install().restart.call_count == 1

    def test_no_installer(self):
        self._call(1, None)  # Just make sure no exceptions are raised


if __name__ == "__main__":
    sys.exit(pytest.main(sys.argv[1:] + [__file__]))  # pragma: no cover
