From 1148d57012cdea81b5cce213e7d4acdcd90ae403 Mon Sep 17 00:00:00 2001
From: Tim Rupp <caphrim007@gmail.com>
Date: Sun, 19 Aug 2018 02:18:15 -0400
Subject: [PATCH] Adds bigip_firewall_policy module (#44361)

This module is used to manage firewall policy objects on a bigip.
---
 .../network/f5/bigip_firewall_policy.py       | 540 ++++++++++++++++++
 .../network/f5/test_bigip_firewall_policy.py  | 115 ++++
 2 files changed, 655 insertions(+)
 create mode 100644 lib/ansible/modules/network/f5/bigip_firewall_policy.py
 create mode 100644 test/units/modules/network/f5/test_bigip_firewall_policy.py

diff --git a/lib/ansible/modules/network/f5/bigip_firewall_policy.py b/lib/ansible/modules/network/f5/bigip_firewall_policy.py
new file mode 100644
index 0000000000..76534ca1dd
--- /dev/null
+++ b/lib/ansible/modules/network/f5/bigip_firewall_policy.py
@@ -0,0 +1,540 @@
+#!/usr/bin/python
+# -*- coding: utf-8 -*-
+#
+# Copyright: (c) 2017, F5 Networks Inc.
+# GNU General Public License v3.0 (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
+
+from __future__ import absolute_import, division, print_function
+__metaclass__ = type
+
+
+ANSIBLE_METADATA = {'metadata_version': '1.1',
+                    'status': ['preview'],
+                    'supported_by': 'community'}
+
+DOCUMENTATION = r'''
+---
+module: bigip_firewall_policy
+short_description: Manage AFM security firewall policies on a BIG-IP
+description:
+  - Manages AFM security firewall policies on a BIG-IP.
+version_added: 2.7
+options:
+  name:
+    description:
+      - The name of the policy to create.
+    required: True
+  description:
+    description:
+      - The description to attach to the policy.
+      - This parameter is only supported on versions of BIG-IP >= 12.1.0. On earlier
+        versions it will simply be ignored.
+  state:
+    description:
+      - When C(state) is C(present), ensures that the policy exists.
+      - When C(state) is C(absent), ensures that the policy is removed.
+    choices:
+      - present
+      - absent
+    default: present
+  rules:
+    description:
+      - Specifies a list of rules that you want associated with this policy.
+        The order of this list is the order they will be evaluated by BIG-IP.
+        If the specified rules do not exist (for example when creating a new
+        policy) then they will be created.
+      - Rules specified here, if they do not exist, will be created with "default deny"
+        behavior. It is expected that you follow-up this module with the actual
+        configuration for these rules.
+      - The C(bigip_firewall_rule) module can be used to also create, as well as
+        edit, existing and new rules.
+  partition:
+    description:
+      - Device partition to manage resources on.
+    default: Common
+extends_documentation_fragment: f5
+author:
+  - Tim Rupp (@caphrim007)
+'''
+
+EXAMPLES = r'''
+- name: Create a basic policy with some rule stubs
+  bigip_firewall_policy:
+    name: foo
+    rules:
+      - rule1
+      - rule2
+      - rule3
+    provider:
+      password: secret
+      server: lb.mydomain.com
+      user: admin
+  delegate_to: localhost
+'''
+
+RETURN = r'''
+description:
+  description: The new description of the policy.
+  returned: changed
+  type: string
+  sample: My firewall policy
+rules:
+  description: The list of rules, in the order that they are evaluated, on the device.
+  returned: changed
+  type: list
+  sample: ['rule1', 'rule2', 'rule3']
+'''
+
+from ansible.module_utils.basic import AnsibleModule
+from ansible.module_utils.basic import env_fallback
+
+try:
+    from library.module_utils.network.f5.bigip import HAS_F5SDK
+    from library.module_utils.network.f5.bigip import F5RestClient
+    from library.module_utils.network.f5.common import F5ModuleError
+    from library.module_utils.network.f5.common import AnsibleF5Parameters
+    from library.module_utils.network.f5.common import cleanup_tokens
+    from library.module_utils.network.f5.common import f5_argument_spec
+    from library.module_utils.network.f5.common import fail_json
+    from library.module_utils.network.f5.common import exit_json
+    from library.module_utils.network.f5.common import transform_name
+except ImportError:
+    from ansible.module_utils.network.f5.bigip import HAS_F5SDK
+    from ansible.module_utils.network.f5.bigip import F5RestClient
+    from ansible.module_utils.network.f5.common import F5ModuleError
+    from ansible.module_utils.network.f5.common import AnsibleF5Parameters
+    from ansible.module_utils.network.f5.common import cleanup_tokens
+    from ansible.module_utils.network.f5.common import f5_argument_spec
+    from ansible.module_utils.network.f5.common import fail_json
+    from ansible.module_utils.network.f5.common import exit_json
+    from ansible.module_utils.network.f5.common import transform_name
+
+
+class Parameters(AnsibleF5Parameters):
+    api_map = {
+        'rulesReference': 'rules'
+    }
+
+    api_attributes = [
+        'description'
+    ]
+
+    returnables = [
+        'description',
+        'rules',
+    ]
+
+    updatables = [
+        'description',
+        'rules'
+    ]
+
+    def to_return(self):
+        result = {}
+        try:
+            for returnable in self.returnables:
+                result[returnable] = getattr(self, returnable)
+            result = self._filter_params(result)
+        except Exception:
+            pass
+        return result
+
+
+class ModuleParameters(Parameters):
+    @property
+    def rules(self):
+        if self._values['rules'] is None:
+            return None
+        # In case rule values are unicode (as they may be coming from the API
+        result = [str(x) for x in self._values['rules']]
+        return result
+
+
+class ApiParameters(Parameters):
+    @property
+    def rules(self):
+        result = []
+        if self._values['rules'] is None or 'items' not in self._values['rules']:
+            return []
+        for idx, item in enumerate(self._values['rules']['items']):
+            result.append(dict(item=item['fullPath'], order=idx))
+        result = [x['item'] for x in sorted(result, key=lambda k: k['order'])]
+        return result
+
+
+class Changes(Parameters):
+    pass
+
+
+class UsableChanges(Changes):
+    pass
+
+
+class ReportableChanges(Changes):
+    pass
+
+
+class Difference(object):
+    def __init__(self, want, have=None):
+        self.want = want
+        self.have = have
+
+    def compare(self, param):
+        try:
+            result = getattr(self, param)
+            return result
+        except AttributeError:
+            return self.__default(param)
+
+    def __default(self, param):
+        attr1 = getattr(self.want, param)
+        try:
+            attr2 = getattr(self.have, param)
+            if attr1 != attr2:
+                return attr1
+        except AttributeError:
+            return attr1
+
+    @property
+    def rules(self):
+        if self.want.rules is None:
+            return None
+        if self.have.rules is None:
+            return self.want.rules
+        if set(self.want.rules) != set(self.have.rules):
+            return self.want.rules
+
+
+class ModuleManager(object):
+    def __init__(self, *args, **kwargs):
+        self.module = kwargs.get('module', None)
+        self.client = kwargs.get('client', None)
+        self.want = ModuleParameters(params=self.module.params)
+        self.have = ApiParameters()
+        self.changes = UsableChanges()
+
+    def _set_changed_options(self):
+        changed = {}
+        for key in Parameters.returnables:
+            if getattr(self.want, key) is not None:
+                changed[key] = getattr(self.want, key)
+        if changed:
+            self.changes = Changes(params=changed)
+
+    def _update_changed_options(self):
+        diff = Difference(self.want, self.have)
+        updatables = Parameters.updatables
+        changed = dict()
+        for k in updatables:
+            change = diff.compare(k)
+            if change is None:
+                continue
+            else:
+                if isinstance(change, dict):
+                    changed.update(change)
+                else:
+                    changed[k] = change
+        if changed:
+            self.changes = Changes(params=changed)
+            return True
+        return False
+
+    def should_update(self):
+        result = self._update_changed_options()
+        if result:
+            return True
+        return False
+
+    def exec_module(self):
+        changed = False
+        result = dict()
+        state = self.want.state
+
+        if state == "present":
+            changed = self.present()
+        elif state == "absent":
+            changed = self.absent()
+
+        changes = self.changes.to_return()
+        result.update(**changes)
+        result.update(dict(changed=changed))
+        self._announce_deprecations(result)
+        return result
+
+    def _announce_deprecations(self, result):
+        warnings = result.pop('__warnings', [])
+        for warning in warnings:
+            self.module.deprecate(
+                msg=warning['msg'],
+                version=warning['version']
+            )
+
+    def present(self):
+        if self.exists():
+            return self.update()
+        else:
+            return self.create()
+
+    def exists(self):
+        uri = "https://{0}:{1}/mgmt/tm/security/firewall/policy/{2}".format(
+            self.client.provider['server'],
+            self.client.provider['server_port'],
+            transform_name(self.want.partition, self.want.name)
+        )
+        resp = self.client.api.get(uri)
+        try:
+            response = resp.json()
+        except ValueError:
+            return False
+        if resp.status == 404 or 'code' in response and response['code'] == 404:
+            return False
+        return True
+
+    def update(self):
+        self.have = self.read_current_from_device()
+        if not self.should_update():
+            return False
+        if self.module.check_mode:
+            return True
+        self.update_on_device()
+        return True
+
+    def remove(self):
+        if self.module.check_mode:
+            return True
+        self.remove_from_device()
+        if self.exists():
+            raise F5ModuleError("Failed to delete the resource.")
+        return True
+
+    def create(self):
+        self._set_changed_options()
+        if self.module.check_mode:
+            return True
+        self.create_on_device()
+        return True
+
+    def create_on_device(self):
+        params = self.changes.api_params()
+        params['name'] = self.want.name
+        params['partition'] = self.want.partition
+        uri = "https://{0}:{1}/mgmt/tm/security/firewall/policy/".format(
+            self.client.provider['server'],
+            self.client.provider['server_port']
+        )
+        resp = self.client.api.post(uri, json=params)
+        try:
+            response = resp.json()
+        except ValueError as ex:
+            raise F5ModuleError(str(ex))
+
+        if 'code' in response and response['code'] in [400, 403]:
+            if 'message' in response:
+                raise F5ModuleError(response['message'])
+            else:
+                raise F5ModuleError(resp.content)
+        if self.want.rules:
+            self._upsert_policy_rules_on_device()
+        return response['selfLink']
+
+    def update_on_device(self):
+        params = self.changes.api_params()
+        uri = "https://{0}:{1}/mgmt/tm/security/firewall/policy/{2}".format(
+            self.client.provider['server'],
+            self.client.provider['server_port'],
+            transform_name(self.want.partition, self.want.name)
+        )
+        if params:
+            resp = self.client.api.patch(uri, json=params)
+            try:
+                response = resp.json()
+            except ValueError as ex:
+                raise F5ModuleError(str(ex))
+
+            if 'code' in response and response['code'] == 400:
+                if 'message' in response:
+                    raise F5ModuleError(response['message'])
+                else:
+                    raise F5ModuleError(resp.content)
+            return response['selfLink']
+        if self.changes.rules is not None:
+            self._upsert_policy_rules_on_device()
+
+    def absent(self):
+        if self.exists():
+            return self.remove()
+        return False
+
+    def remove_from_device(self):
+        uri = "https://{0}:{1}/mgmt/tm/security/firewall/policy/{2}".format(
+            self.client.provider['server'],
+            self.client.provider['server_port'],
+            transform_name(self.want.partition, self.want.name)
+        )
+        response = self.client.api.delete(uri)
+        if response.status == 200:
+            return True
+        if 'code' in response and response['code'] == 400:
+            if 'message' in response:
+                raise F5ModuleError(response['message'])
+            else:
+                raise F5ModuleError(response.content)
+
+    def read_current_from_device(self):
+        uri = "https://{0}:{1}/mgmt/tm/security/firewall/policy/{2}/?expandSubcollections=true".format(
+            self.client.provider['server'],
+            self.client.provider['server_port'],
+            transform_name(self.want.partition, self.want.name)
+        )
+        resp = self.client.api.get(uri)
+        try:
+            response = resp.json()
+        except ValueError as ex:
+            raise F5ModuleError(str(ex))
+
+        if 'code' in response and response['code'] == 400:
+            if 'message' in response:
+                raise F5ModuleError(response['message'])
+            else:
+                raise F5ModuleError(resp.content)
+        return ApiParameters(params=response)
+
+    def rule_exists(self, rule):
+        uri = "https://{0}:{1}/mgmt/tm/security/firewall/policy/{2}/rules/{3}".format(
+            self.client.provider['server'],
+            self.client.provider['server_port'],
+            transform_name(self.want.partition, self.want.name),
+            rule.replace('/', '_')
+        )
+        resp = self.client.api.get(uri)
+        try:
+            response = resp.json()
+        except ValueError:
+            return False
+        if resp.status == 404 or 'code' in response and response['code'] == 404:
+            return False
+        return True
+
+    def create_default_rule_on_device(self, rule):
+        params = dict(
+            name=rule.replace('/', '_'),
+            action='reject',
+            # Adding items to the end of the list causes the list of rules to match
+            # what the user specified in the original list.
+            placeAfter='last',
+        )
+        uri = "https://{0}:{1}/mgmt/tm/security/firewall/policy/{2}/rules/".format(
+            self.client.provider['server'],
+            self.client.provider['server_port'],
+            transform_name(self.want.partition, self.want.name),
+        )
+        resp = self.client.api.post(uri, json=params)
+        try:
+            response = resp.json()
+        except ValueError as ex:
+            raise F5ModuleError(str(ex))
+
+        if 'code' in response and response['code'] in [400, 403]:
+            if 'message' in response:
+                raise F5ModuleError(response['message'])
+            else:
+                raise F5ModuleError(resp.content)
+        return response['selfLink']
+
+    def remove_rule_from_device(self, rule):
+        uri = "https://{0}:{1}/mgmt/tm/security/firewall/policy/{2}/rules/{3}".format(
+            self.client.provider['server'],
+            self.client.provider['server_port'],
+            transform_name(self.want.partition, self.want.name),
+            rule.replace('/', '_'),
+        )
+        # this response returns no payload
+        resp = self.client.api.delete(uri)
+        if resp.status in [400, 403]:
+            raise F5ModuleError(resp.content)
+
+    def move_rule_to_front(self, rule):
+        params = dict(
+            placeAfter='last'
+        )
+        uri = "https://{0}:{1}/mgmt/tm/security/firewall/policy/{2}/rules/{3}".format(
+            self.client.provider['server'],
+            self.client.provider['server_port'],
+            transform_name(self.want.partition, self.want.name),
+            rule.replace('/', '_')
+        )
+        resp = self.client.api.patch(uri, json=params)
+        try:
+            response = resp.json()
+        except ValueError as ex:
+            raise F5ModuleError(str(ex))
+
+        if 'code' in response and response['code'] in [400, 403]:
+            if 'message' in response:
+                raise F5ModuleError(response['message'])
+            else:
+                raise F5ModuleError(resp.content)
+        return response['selfLink']
+
+    def _upsert_policy_rules_on_device(self):
+        rules = self.changes.rules
+        if rules is None:
+            rules = []
+        self._remove_rule_difference(rules)
+
+        for idx, rule in enumerate(rules):
+            if not self.rule_exists(rule):
+                self.create_default_rule_on_device(rule)
+        for idx, rule in enumerate(rules):
+            self.move_rule_to_front(rule)
+
+    def _remove_rule_difference(self, rules):
+        if rules is None or self.have.rules is None:
+            return
+        have_rules = set(self.have.rules)
+        want_rules = set(rules)
+        removable = have_rules.difference(want_rules)
+        for remove in removable:
+            self.remove_rule_from_device(remove)
+
+
+class ArgumentSpec(object):
+    def __init__(self):
+        self.supports_check_mode = True
+        argument_spec = dict(
+            name=dict(required=True),
+            description=dict(),
+            rules=dict(type='list'),
+            partition=dict(
+                default='Common',
+                fallback=(env_fallback, ['F5_PARTITION'])
+            ),
+            state=dict(
+                default='present',
+                choices=['present', 'absent']
+            )
+        )
+        self.argument_spec = {}
+        self.argument_spec.update(f5_argument_spec)
+        self.argument_spec.update(argument_spec)
+
+
+def main():
+    spec = ArgumentSpec()
+
+    module = AnsibleModule(
+        argument_spec=spec.argument_spec,
+        supports_check_mode=spec.supports_check_mode,
+    )
+
+    try:
+        client = F5RestClient(**module.params)
+        mm = ModuleManager(module=module, client=client)
+        results = mm.exec_module()
+        exit_json(module, results, client)
+    except F5ModuleError as ex:
+        fail_json(module, ex, client)
+
+
+if __name__ == '__main__':
+    main()
diff --git a/test/units/modules/network/f5/test_bigip_firewall_policy.py b/test/units/modules/network/f5/test_bigip_firewall_policy.py
new file mode 100644
index 0000000000..78a868be79
--- /dev/null
+++ b/test/units/modules/network/f5/test_bigip_firewall_policy.py
@@ -0,0 +1,115 @@
+# -*- coding: utf-8 -*-
+#
+# Copyright: (c) 2017, F5 Networks Inc.
+# GNU General Public License v3.0 (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
+
+from __future__ import (absolute_import, division, print_function)
+__metaclass__ = type
+
+import os
+import json
+import pytest
+import sys
+
+from nose.plugins.skip import SkipTest
+if sys.version_info < (2, 7):
+    raise SkipTest("F5 Ansible modules require Python >= 2.7")
+
+from ansible.compat.tests import unittest
+from ansible.compat.tests.mock import Mock
+from ansible.compat.tests.mock import patch
+from ansible.module_utils.basic import AnsibleModule
+
+try:
+    from library.modules.bigip_firewall_policy import ApiParameters
+    from library.modules.bigip_firewall_policy import ModuleParameters
+    from library.modules.bigip_firewall_policy import ModuleManager
+    from library.modules.bigip_firewall_policy import ArgumentSpec
+    from library.module_utils.network.f5.common import F5ModuleError
+    from test.unit.modules.utils import set_module_args
+except ImportError:
+    try:
+        from ansible.modules.network.f5.bigip_firewall_policy import ApiParameters
+        from ansible.modules.network.f5.bigip_firewall_policy import ModuleParameters
+        from ansible.modules.network.f5.bigip_firewall_policy import ModuleManager
+        from ansible.modules.network.f5.bigip_firewall_policy import ArgumentSpec
+        from ansible.module_utils.network.f5.common import F5ModuleError
+        from units.modules.utils import set_module_args
+    except ImportError:
+        raise SkipTest("F5 Ansible modules require the f5-sdk Python library")
+
+fixture_path = os.path.join(os.path.dirname(__file__), 'fixtures')
+fixture_data = {}
+
+
+def load_fixture(name):
+    path = os.path.join(fixture_path, name)
+
+    if path in fixture_data:
+        return fixture_data[path]
+
+    with open(path) as f:
+        data = f.read()
+
+    try:
+        data = json.loads(data)
+    except Exception:
+        pass
+
+    fixture_data[path] = data
+    return data
+
+
+class TestParameters(unittest.TestCase):
+    def test_module_parameters(self):
+        args = dict(
+            name='foo',
+            description='my description',
+            rules=['rule1', 'rule2', 'rule3']
+        )
+
+        p = ModuleParameters(params=args)
+        assert p.name == 'foo'
+        assert p.description == 'my description'
+        assert p.rules == ['rule1', 'rule2', 'rule3']
+
+    def test_api_parameters(self):
+        args = load_fixture('load_security_firewall_policy_1.json')
+
+        p = ApiParameters(params=args)
+        assert p.name == 'foo'
+        assert p.description == 'my description'
+        assert p.rules == ['rule1', 'rule2', 'rule3']
+
+
+class TestManager(unittest.TestCase):
+
+    def setUp(self):
+        self.spec = ArgumentSpec()
+
+    def test_create(self, *args):
+        set_module_args(dict(
+            name='foo',
+            description='this is a description',
+            rules=['rule1', 'rule2', 'rule3'],
+            password='password',
+            server='localhost',
+            user='admin'
+        ))
+
+        module = AnsibleModule(
+            argument_spec=self.spec.argument_spec,
+            supports_check_mode=self.spec.supports_check_mode
+        )
+        mm = ModuleManager(module=module)
+
+        # Override methods to force specific logic in the module to happen
+        mm.exists = Mock(side_effect=[False, True])
+        mm.create_on_device = Mock(return_value=True)
+
+        results = mm.exec_module()
+
+        assert results['changed'] is True
+        assert 'rules' in results
+        assert len(results['rules']) == 3
+        assert results['description'] == 'this is a description'