Add ProviderBootstrapper tests

2 files changed, 537 insertions, 0 deletions

diff --git a/src/leap/services/eip/tests/test_providerbootstrapper.py b/src/leap/services/eip/tests/test_providerbootstrapper.py
new file mode 100644
index 00000000..cd740793
--- /dev/null
+++ b/src/leap/services/eip/tests/test_providerbootstrapper.py
@@ -0,0 +1,504 @@
+# -*- coding: utf-8 -*-
+# test_providerbootstrapper.py
+# Copyright (C) 2013 LEAP
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+
+"""
+Tests for the Provider Boostrapper checks
+
+These will be whitebox tests since we want to make sure the private
+implementation is checking what we expect.
+"""
+
+import os
+import mock
+import socket
+import stat
+import tempfile
+import time
+import requests
+try:
+    import unittest2 as unittest
+except ImportError:
+    import unittest
+
+from nose.twistedtools import deferred, reactor
+from twisted.internet import threads
+from requests.models import Response
+
+from leap.common.testing.https_server import where
+from leap.common.testing.basetest import BaseLeapTest
+from leap.services.eip.providerbootstrapper import ProviderBootstrapper
+from leap.services.eip.providerbootstrapper import UnsupportedProviderAPI
+from leap.provider.supportedapis import SupportedAPIs
+from leap.config.providerconfig import ProviderConfig
+from leap.crypto.tests import fake_provider
+from leap.common.files import mkdir_p
+
+
+class ProviderBootstrapperTest(BaseLeapTest):
+    def setUp(self):
+        self.pb = ProviderBootstrapper()
+
+    def tearDown(self):
+        pass
+
+    def test_name_resolution_check(self):
+        # Something highly likely to success
+        self.pb._domain = "google.com"
+        self.pb._check_name_resolution()
+        # Something highly likely to fail
+        self.pb._domain = "uquhqweuihowquie.abc.def"
+        with self.assertRaises(socket.gaierror):
+            self.pb._check_name_resolution()
+
+    @deferred()
+    def test_run_provider_select_checks(self):
+        self.pb._check_name_resolution = mock.MagicMock()
+        self.pb._check_https = mock.MagicMock()
+        self.pb._download_provider_info = mock.MagicMock()
+
+        d = self.pb.run_provider_select_checks("somedomain")
+
+        def check(*args):
+            self.pb._check_name_resolution.assert_called_once_with()
+            self.pb._check_https.assert_called_once_with(None)
+            self.pb._download_provider_info.assert_called_once_with(None)
+        d.addCallback(check)
+        return d
+
+    @deferred()
+    def test_run_provider_setup_checks(self):
+        self.pb._download_ca_cert = mock.MagicMock()
+        self.pb._check_ca_fingerprint = mock.MagicMock()
+        self.pb._check_api_certificate = mock.MagicMock()
+
+        d = self.pb.run_provider_setup_checks(ProviderConfig())
+
+        def check(*args):
+            self.pb._download_ca_cert.assert_called_once_with()
+            self.pb._check_ca_fingerprint.assert_called_once_with(None)
+            self.pb._check_api_certificate.assert_called_once_with(None)
+        d.addCallback(check)
+        return d
+
+    def test_should_proceed_cert(self):
+        self.pb._provider_config = mock.Mock()
+        self.pb._provider_config.get_ca_cert_path = mock.MagicMock(
+            return_value=where("cacert.pem"))
+
+        self.pb._download_if_needed = False
+        self.assertTrue(self.pb._should_proceed_cert())
+
+        self.pb._download_if_needed = True
+        self.assertFalse(self.pb._should_proceed_cert())
+
+        self.pb._provider_config.get_ca_cert_path = mock.MagicMock(
+            return_value=where("somefilethatdoesntexist.pem"))
+        self.assertTrue(self.pb._should_proceed_cert())
+
+    def _check_download_ca_cert(self, should_proceed):
+        """
+        Helper to check different paths easily for the download ca
+        cert check
+
+        :param should_proceed: sets the _should_proceed_cert in the
+                               provider bootstrapper being tested
+        :type should_proceed: bool
+
+        :returns: The contents of the certificate, the expected
+                  content depending on should_proceed, and the mode of
+                  the file to be checked by the caller
+        :rtype: tuple of str, str, int
+        """
+        old_content = "NOT THE NEW CERT"
+        new_content = "NEW CERT"
+        new_cert_path = os.path.join(tempfile.mkdtemp(),
+                                     "mynewcert.pem")
+
+        with open(new_cert_path, "w") as c:
+            c.write(old_content)
+
+        self.pb._provider_config = mock.Mock()
+        self.pb._provider_config.get_ca_cert_path = mock.MagicMock(
+            return_value=new_cert_path)
+        self.pb._domain = "somedomain"
+
+        self.pb._should_proceed_cert = mock.MagicMock(
+            return_value=should_proceed)
+
+        read = None
+        content_to_check = None
+        mode = None
+
+        with mock.patch('requests.models.Response.content',
+                        new_callable=mock.PropertyMock) as \
+                content:
+            content.return_value = new_content
+            response_obj = Response()
+            response_obj.raise_for_status = mock.MagicMock()
+
+            self.pb._session.get = mock.MagicMock(return_value=response_obj)
+            self.pb._download_ca_cert()
+            with open(new_cert_path, "r") as nc:
+                read = nc.read()
+                if should_proceed:
+                    content_to_check = new_content
+                else:
+                    content_to_check = old_content
+            mode = stat.S_IMODE(os.stat(new_cert_path).st_mode)
+
+        os.unlink(new_cert_path)
+        return read, content_to_check, mode
+
+    def test_download_ca_cert_no_saving(self):
+        read, expected_read, mode = self._check_download_ca_cert(False)
+        self.assertEqual(read, expected_read)
+        self.assertEqual(mode, int("600", 8))
+
+    def test_download_ca_cert_saving(self):
+        read, expected_read, mode = self._check_download_ca_cert(True)
+        self.assertEqual(read, expected_read)
+        self.assertEqual(mode, int("600", 8))
+
+    def test_check_ca_fingerprint_skips(self):
+        self.pb._provider_config = mock.Mock()
+        self.pb._provider_config.get_ca_cert_fingerprint = mock.MagicMock(
+            return_value="")
+        self.pb._domain = "somedomain"
+
+        self.pb._should_proceed_cert = mock.MagicMock(return_value=False)
+
+        self.pb._check_ca_fingerprint()
+        self.assertFalse(self.pb._provider_config.
+                         get_ca_cert_fingerprint.called)
+
+    def test_check_ca_cert_fingerprint_raises_bad_format(self):
+        self.pb._provider_config = mock.Mock()
+        self.pb._provider_config.get_ca_cert_fingerprint = mock.MagicMock(
+            return_value="wrongfprformat!!")
+        self.pb._domain = "somedomain"
+
+        self.pb._should_proceed_cert = mock.MagicMock(return_value=True)
+
+        with self.assertRaises(AssertionError):
+            self.pb._check_ca_fingerprint()
+
+    # This two hashes different in the last byte, but that's good enough
+    # for the tests
+    KNOWN_BAD_HASH = "SHA256: 0f17c033115f6b76ff67871872303ff65034efe" \
+                     "7dd1b910062ca323eb4da5c7f"
+    KNOWN_GOOD_HASH = "SHA256: 0f17c033115f6b76ff67871872303ff65034ef" \
+                      "e7dd1b910062ca323eb4da5c7e"
+    KNOWN_GOOD_CERT = """
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
+"""
+
+    def _prepare_provider_config_with(self, cert_path, cert_hash):
+        """
+        Mocks the provider config to give the cert_path and cert_hash
+        specified
+
+        :param cert_path: path for the certificate
+        :type cert_path: str
+        :param cert_hash: hash for the certificate as it would appear
+                          in the provider config json
+        :type cert_hash: str
+        """
+        self.pb._provider_config = mock.Mock()
+        self.pb._provider_config.get_ca_cert_fingerprint = mock.MagicMock(
+            return_value=cert_hash)
+        self.pb._provider_config.get_ca_cert_path = mock.MagicMock(
+            return_value=cert_path)
+        self.pb._domain = "somedomain"
+
+    def test_check_ca_fingerprint_checksout(self):
+        cert_path = os.path.join(tempfile.mkdtemp(),
+                                 "mynewcert.pem")
+
+        with open(cert_path, "w") as c:
+            c.write(self.KNOWN_GOOD_CERT)
+
+        self._prepare_provider_config_with(cert_path, self.KNOWN_GOOD_HASH)
+
+        self.pb._should_proceed_cert = mock.MagicMock(return_value=True)
+
+        self.pb._check_ca_fingerprint()
+
+        os.unlink(cert_path)
+
+    def test_check_ca_fingerprint_fails(self):
+        cert_path = os.path.join(tempfile.mkdtemp(),
+                                 "mynewcert.pem")
+
+        with open(cert_path, "w") as c:
+            c.write(self.KNOWN_GOOD_CERT)
+
+        self._prepare_provider_config_with(cert_path, self.KNOWN_BAD_HASH)
+
+        self.pb._should_proceed_cert = mock.MagicMock(return_value=True)
+
+        with self.assertRaises(AssertionError):
+            self.pb._check_ca_fingerprint()
+
+        os.unlink(cert_path)
+
+
+###############################################################################
+# Tests with a fake provider                                                  #
+###############################################################################
+
+class ProviderBootstrapperActiveTest(unittest.TestCase):
+    @classmethod
+    def setUpClass(cls):
+        factory = fake_provider.get_provider_factory()
+        http = reactor.listenTCP(8002, factory)
+        https = reactor.listenSSL(
+            0, factory,
+            fake_provider.OpenSSLServerContextFactory())
+        get_port = lambda p: p.getHost().port
+        cls.http_port = get_port(http)
+        cls.https_port = get_port(https)
+
+    def setUp(self):
+        self.pb = ProviderBootstrapper()
+
+        # At certain points we are going to be replacing these methods
+        # directly in ProviderConfig to be able to catch calls from
+        # new ProviderConfig objects inside the methods tested. We
+        # need to save the old implementation and restore it in
+        # tearDown so we are sure everything is as expected for each
+        # test. If we do it inside each specific test, a failure in
+        # the test will leave the implementation with the mock.
+        self.old_gpp = ProviderConfig.get_path_prefix
+        self.old_load = ProviderConfig.load
+        self.old_save = ProviderConfig.save
+        self.old_api_version = ProviderConfig.get_api_version
+
+    def tearDown(self):
+        ProviderConfig.get_path_prefix = self.old_gpp
+        ProviderConfig.load = self.old_load
+        ProviderConfig.save = self.old_save
+        ProviderConfig.get_api_version = self.old_api_version
+
+    def test_check_https_succeeds(self):
+        # XXX: Need a proper CA signed cert to test this
+        pass
+
+    @deferred()
+    def test_check_https_fails(self):
+        self.pb._domain = "localhost:%s" % (self.https_port,)
+
+        def check(*args):
+            with self.assertRaises(requests.exceptions.SSLError):
+                self.pb._check_https()
+        return threads.deferToThread(check)
+
+    @deferred()
+    def test_second_check_https_fails(self):
+        self.pb._domain = "localhost:1234"
+
+        def check(*args):
+            with self.assertRaises(Exception):
+                self.pb._check_https()
+        return threads.deferToThread(check)
+
+    @deferred()
+    def test_check_https_succeeds_if_danger(self):
+        self.pb._domain = "localhost:%s" % (self.https_port,)
+        self.pb._bypass_checks = True
+
+        def check(*args):
+            self.pb._check_https()
+
+        return threads.deferToThread(check)
+
+    def _setup_provider_config_with(self, api, path_prefix):
+        """
+        Sets up the ProviderConfig with mocks for the path prefix, the
+        api returned and load/save methods.
+        It modifies ProviderConfig directly instead of an object
+        because the object used is created in the method itself and we
+        cannot control that.
+
+        :param api: API to return
+        :type api: str
+        :param path_prefix: path prefix to be used when calculating
+                            paths
+        :type path_prefix: str
+        """
+        ProviderConfig.get_path_prefix = mock.MagicMock(
+            return_value=path_prefix)
+        ProviderConfig.get_api_version = mock.MagicMock(
+            return_value=api)
+        ProviderConfig.load = mock.MagicMock()
+        ProviderConfig.save = mock.MagicMock()
+
+    def _setup_providerbootstrapper(self, ifneeded):
+        """
+        Sets the provider bootstrapper's domain to
+        localhost:https_port, sets it to bypass https checks and sets
+        the download if needed based on the ifneeded value.
+
+        :param ifneeded: Value for _download_if_needed
+        :type ifneeded: bool
+        """
+        self.pb._domain = "localhost:%s" % (self.https_port,)
+        self.pb._bypass_checks = True
+        self.pb._download_if_needed = ifneeded
+
+    def _produce_dummy_provider_json(self):
+        """
+        Creates a dummy provider json on disk in order to test
+        behaviour around it (download if newer online, etc)
+
+        :returns: the provider.json path used
+        :rtype: str
+        """
+        provider_dir = os.path.join(ProviderConfig()
+                                    .get_path_prefix(),
+                                    "leap",
+                                    "providers",
+                                    self.pb._domain)
+        mkdir_p(provider_dir)
+        provider_path = os.path.join(provider_dir,
+                                     "provider.json")
+
+        with open(provider_path, "w") as p:
+            p.write("A")
+        return provider_path
+
+    def test_download_provider_info_not_modified(self):
+        self._setup_provider_config_with("1", tempfile.mkdtemp())
+        self._setup_providerbootstrapper(True)
+        provider_path = self._produce_dummy_provider_json()
+
+        # set mtime to something really new
+        os.utime(provider_path, (-1, time.time()))
+
+        self.pb._download_provider_info()
+        # we check that it doesn't do anything with the provider
+        # config, because it's new enough
+        self.assertFalse(ProviderConfig.load.called)
+        self.assertFalse(ProviderConfig.save.called)
+
+    def test_download_provider_info_modified(self):
+        self._setup_provider_config_with("1", tempfile.mkdtemp())
+        self._setup_providerbootstrapper(True)
+        provider_path = self._produce_dummy_provider_json()
+
+        # set mtime to something really old
+        os.utime(provider_path, (-1, 100))
+
+        self.pb._download_provider_info()
+        self.assertTrue(ProviderConfig.load.called)
+        self.assertTrue(ProviderConfig.save.called)
+
+    def test_download_provider_info_unsupported_api_raises(self):
+        self._setup_provider_config_with("9999999", tempfile.mkdtemp())
+        self._setup_providerbootstrapper(False)
+        self._produce_dummy_provider_json()
+
+        with self.assertRaises(UnsupportedProviderAPI):
+            self.pb._download_provider_info()
+
+    def test_download_provider_info_unsupported_api(self):
+        self._setup_provider_config_with(SupportedAPIs.SUPPORTED_APIS[0],
+                                         tempfile.mkdtemp())
+        self._setup_providerbootstrapper(False)
+        self._produce_dummy_provider_json()
+
+        self.pb._download_provider_info()
+
+    def test_check_api_certificate_skips(self):
+        self.pb._provider_config = ProviderConfig()
+        self.pb._provider_config.get_api_uri = mock.MagicMock(
+            return_value="api.uri")
+        self.pb._provider_config.get_ca_cert_path = mock.MagicMock(
+            return_value="/cert/path")
+        self.pb._session.get = mock.MagicMock(return_value=Response())
+
+        self.pb._should_proceed_cert = mock.MagicMock(return_value=False)
+        self.pb._check_api_certificate()
+        self.assertFalse(self.pb._session.get.called)
+
+    @deferred()
+    def test_check_api_certificate_fails(self):
+        self.pb._provider_config = ProviderConfig()
+        self.pb._provider_config.get_api_uri = mock.MagicMock(
+            return_value="https://localhost:%s" % (self.https_port,))
+        self.pb._provider_config.get_ca_cert_path = mock.MagicMock(
+            return_value=os.path.join(
+                os.path.split(__file__)[0],
+                "wrongcert.pem"))
+        self.pb._provider_config.get_api_version = mock.MagicMock(
+            return_value="1")
+
+        self.pb._should_proceed_cert = mock.MagicMock(return_value=True)
+
+        def check(*args):
+            with self.assertRaises(requests.exceptions.SSLError):
+                self.pb._check_api_certificate()
+        d = threads.deferToThread(check)
+        return d
+
+    @deferred()
+    def test_check_api_certificate_succeeds(self):
+        self.pb._provider_config = ProviderConfig()
+        self.pb._provider_config.get_api_uri = mock.MagicMock(
+            return_value="https://localhost:%s" % (self.https_port,))
+        self.pb._provider_config.get_ca_cert_path = mock.MagicMock(
+            return_value=where('cacert.pem'))
+        self.pb._provider_config.get_api_version = mock.MagicMock(
+            return_value="1")
+
+        self.pb._should_proceed_cert = mock.MagicMock(return_value=True)
+
+        def check(*args):
+            self.pb._check_api_certificate()
+        d = threads.deferToThread(check)
+        return d
diff --git a/src/leap/services/eip/tests/wrongcert.pem b/src/leap/services/eip/tests/wrongcert.pem
new file mode 100644
index 00000000..e6cff38a
--- /dev/null
+++ b/src/leap/services/eip/tests/wrongcert.pem
@@ -0,0 +1,33 @@
+-----BEGIN CERTIFICATE-----
+MIIFtTCCA52gAwIBAgIJAIWZus5EIXNtMA0GCSqGSIb3DQEBBQUAMEUxCzAJBgNV
+BAYTAkFVMRMwEQYDVQQIEwpTb21lLVN0YXRlMSEwHwYDVQQKExhJbnRlcm5ldCBX
+aWRnaXRzIFB0eSBMdGQwHhcNMTMwNjI1MTc0NjExWhcNMTgwNjI1MTc0NjExWjBF
+MQswCQYDVQQGEwJBVTETMBEGA1UECBMKU29tZS1TdGF0ZTEhMB8GA1UEChMYSW50
+ZXJuZXQgV2lkZ2l0cyBQdHkgTHRkMIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIIC
+CgKCAgEA2ObM7ESjyuxFZYD/Y68qOPQgjgggW+cdXfBpU2p4n7clsrUeMhWdW40Y
+77Phzor9VOeqs3ZpHuyLzsYVp/kFDm8tKyo2ah5fJwzL0VCSLYaZkUQQ7GNUmTCk
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+-----END CERTIFICATE-----