port common policy code to keystone

keystone.common.policy is copied from nova

leave simple backend in as a shim until devstack stops referencing it

Change-Id: Ibd579cfeb99465706d525b6565818a2d8f5f3b7c

1 files changed, 180 insertions, 0 deletions

diff --git a/tests/test_policy.py b/tests/test_policy.py
new file mode 100644
index 00000000..b437c6a4
--- /dev/null
+++ b/tests/test_policy.py
@@ -0,0 +1,180 @@
+# vim: tabstop=4 shiftwidth=4 softtabstop=4
+
+# Copyright 2011 Piston Cloud Computing, Inc.
+# All Rights Reserved.
+
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+
+import StringIO
+import tempfile
+import urllib2
+
+from keystone import config
+from keystone import exception
+from keystone import test
+from keystone.common import policy as common_policy
+from keystone.policy.backends import rules
+
+
+CONF = config.CONF
+
+
+class PolicyFileTestCase(test.TestCase):
+    def setUp(self):
+        super(PolicyFileTestCase, self).setUp()
+        rules.reset()
+        _unused, self.tmpfilename = tempfile.mkstemp()
+        self.opt(policy_file=self.tmpfilename)
+        self.target = {}
+
+    def tearDown(self):
+        super(PolicyFileTestCase, self).tearDown()
+        rules.reset()
+
+    def test_modified_policy_reloads(self):
+        action = "example:test"
+        empty_credentials = {}
+        with open(self.tmpfilename, "w") as policyfile:
+            policyfile.write("""{"example:test": []}""")
+        rules.enforce(empty_credentials, action, self.target)
+        with open(self.tmpfilename, "w") as policyfile:
+            policyfile.write("""{"example:test": ["false:false"]}""")
+        # NOTE(vish): reset stored policy cache so we don't have to sleep(1)
+        rules._POLICY_CACHE = {}
+        self.assertRaises(exception.Forbidden, rules.enforce,
+                          empty_credentials, action, self.target)
+
+
+class PolicyTestCase(test.TestCase):
+    def setUp(self):
+        super(PolicyTestCase, self).setUp()
+        rules.reset()
+        # NOTE(vish): preload rules to circumvent reloading from file
+        rules.init()
+        brain = {
+            "true": [],
+            "example:allowed": [],
+            "example:denied": [["false:false"]],
+            "example:get_http": [["http:http://www.example.com"]],
+            "example:my_file": [["role:compute_admin"],
+                                ["project_id:%(project_id)s"]],
+            "example:early_and_fail": [["false:false", "rule:true"]],
+            "example:early_or_success": [["rule:true"], ["false:false"]],
+            "example:lowercase_admin": [["role:admin"], ["role:sysadmin"]],
+            "example:uppercase_admin": [["role:ADMIN"], ["role:sysadmin"]],
+        }
+        # NOTE(vish): then overload underlying brain
+        common_policy.set_brain(common_policy.HttpBrain(brain))
+        self.credentials = {}
+        self.target = {}
+
+    def tearDown(self):
+        rules.reset()
+        super(PolicyTestCase, self).tearDown()
+
+    def test_enforce_nonexistent_action_throws(self):
+        action = "example:noexist"
+        self.assertRaises(exception.Forbidden, rules.enforce,
+                          self.credentials, action, self.target)
+
+    def test_enforce_bad_action_throws(self):
+        action = "example:denied"
+        self.assertRaises(exception.Forbidden, rules.enforce,
+                          self.credentials, action, self.target)
+
+    def test_enforce_good_action(self):
+        action = "example:allowed"
+        rules.enforce(self.credentials, action, self.target)
+
+    def test_enforce_http_true(self):
+
+        def fakeurlopen(url, post_data):
+            return StringIO.StringIO("True")
+
+        self.stubs.Set(urllib2, 'urlopen', fakeurlopen)
+        action = "example:get_http"
+        target = {}
+        result = rules.enforce(self.credentials, action, target)
+        self.assertEqual(result, None)
+
+    def test_enforce_http_false(self):
+
+        def fakeurlopen(url, post_data):
+            return StringIO.StringIO("False")
+        self.stubs.Set(urllib2, 'urlopen', fakeurlopen)
+        action = "example:get_http"
+        target = {}
+        self.assertRaises(exception.Forbidden, rules.enforce,
+                          self.credentials, action, target)
+
+    def test_templatized_enforcement(self):
+        target_mine = {'project_id': 'fake'}
+        target_not_mine = {'project_id': 'another'}
+        credentials = {'project_id': 'fake', 'roles': []}
+        action = "example:my_file"
+        rules.enforce(credentials, action, target_mine)
+        self.assertRaises(exception.Forbidden, rules.enforce,
+                          credentials, action, target_not_mine)
+
+    def test_early_AND_enforcement(self):
+        action = "example:early_and_fail"
+        self.assertRaises(exception.Forbidden, rules.enforce,
+                          self.credentials, action, self.target)
+
+    def test_early_OR_enforcement(self):
+        action = "example:early_or_success"
+        rules.enforce(self.credentials, action, self.target)
+
+    def test_ignore_case_role_check(self):
+        lowercase_action = "example:lowercase_admin"
+        uppercase_action = "example:uppercase_admin"
+        # NOTE(dprince) we mix case in the Admin role here to ensure
+        # case is ignored
+        admin_credentials = {'roles': ['AdMiN']}
+        rules.enforce(admin_credentials, lowercase_action, self.target)
+        rules.enforce(admin_credentials, uppercase_action, self.target)
+
+
+class DefaultPolicyTestCase(test.TestCase):
+    def setUp(self):
+        super(DefaultPolicyTestCase, self).setUp()
+        rules.reset()
+        rules.init()
+
+        self.brain = {
+            "default": [],
+            "example:exist": [["false:false"]]
+        }
+
+        self._set_brain('default')
+        self.credentials = {}
+
+    def _set_brain(self, default_rule):
+        brain = common_policy.HttpBrain(self.brain, default_rule)
+        common_policy.set_brain(brain)
+
+    def tearDown(self):
+        super(DefaultPolicyTestCase, self).setUp()
+        rules.reset()
+
+    def test_policy_called(self):
+        self.assertRaises(exception.Forbidden, rules.enforce,
+                          self.credentials, "example:exist", {})
+
+    def test_not_found_policy_calls_default(self):
+        rules.enforce(self.credentials, "example:noexist", {})
+
+    def test_default_not_found(self):
+        self._set_brain("default_noexist")
+        self.assertRaises(exception.Forbidden, rules.enforce,
+                          self.credentials, "example:noexist", {})