Add security module

Initial commit wich adds the security module to the fuelmenu.

DocImpact
Change-Id: I2d1149a7596d596f581b7628de7089ac375772f6
Partial-Bug: #1557190

fuelmenu/modules/security.py

@@ -0,0 +1,120 @@
+#!/usr/bin/env python
+# Copyright 2016 Mirantis, Inc.
+#
+# 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 logging
+import urwid
+
+from fuelmenu.common import dialog
+from fuelmenu.common import modulehelper as helper
+from fuelmenu.common import network
+from fuelmenu.common import urwidwrapper as widget
+
+log = logging.getLogger('fuelmenu.security')
+
+SSH_NETWORK = 'ADMIN_NETWORK/ssh_network'
+
+
+class security(urwid.WidgetWrap):
+    def __init__(self, parent):
+        self.name = "Security Setup"
+        self.priority = 6
+        self.visible = True
+        self.parent = parent
+        self.screen = None
+
+        # UI text
+        self.header_content = ["Security settings", ""]
+        self.fields = [SSH_NETWORK]
+
+        self.defaults = {
+            SSH_NETWORK: {
+                "label": "Restrict SSH access on network ",
+                "tooltip": "Enter network address in CIDR format",
+                "value": ""
+            }
+        }
+        self.load()
+        self.screen = None
+
+    def check(self, args):
+        self.parent.footer.set_text("Checking data...")
+        self.parent.refreshScreen()
+
+        responses = dict()
+        for index, fieldname in enumerate(self.fields):
+            if fieldname != helper.BLANK_KEY:
+                responses[fieldname] = self.edits[index].get_edit_text()
+
+        ssh_network = responses[SSH_NETWORK]
+        errors = []
+
+        if len(ssh_network) == 0:
+            self.parent.footer.set_text("Address is empty, "
+                                        "will be changed to 0.0.0.0/0")
+            log.warning("Empty address, changed to 0.0.0.0/0")
+            responses[SSH_NETWORK] = "0.0.0.0/0"
+
+            msg = "If you continue without the address, you may able to"\
+                  + " access the Fuel through SSH from any network. The"\
+                  + " address will be changed to 0.0.0.0/0. This can lead"\
+                  + " to the security issues."
+
+            dialog.display_dialog(
+                self, widget.TextLabel(msg), "Empty Address Warning")
+
+        else:
+            if not network.getCidrSize(ssh_network):
+                errors.append("Incorrect network address format: {0}."
+                              .format(ssh_network))
+
+        if len(errors) > 0:
+            log.error("Errors: %s %s", len(errors), errors)
+            helper.ModuleHelper.display_failed_check_dialog(self, errors)
+            return False
+
+        self.parent.footer.set_text("No errors found.")
+        return responses
+
+    def apply(self, args):
+        responses = self.check(args)
+        if responses is False:
+            log.error("Check failed. Not applying")
+            return False
+        self.save(responses)
+        return True
+
+    def save(self, responses):
+        newsettings = helper.ModuleHelper.make_settings_from_responses(
+            responses)
+        self.parent.settings.merge(newsettings)
+
+    def load(self):
+        helper.ModuleHelper.load_to_defaults(
+            self.parent.settings,
+            self.defaults,
+            ignoredparams=[SSH_NETWORK])
+        admin_network = self.parent.settings["ADMIN_NETWORK"]
+        self.defaults[SSH_NETWORK]['value'] = network.getCidr(
+            admin_network["ipaddress"],
+            admin_network["netmask"])
+        if 'ssh_network' in admin_network:
+            self.defaults[SSH_NETWORK]['value'] = admin_network["ssh_network"]
+
+    def refresh(self):
+        pass
+
+    def screenUI(self):
+        return helper.ModuleHelper.screenUI(self, self.header_content,
+                                            self.fields, self.defaults)