mgr/dashboard: authmanager: authorization handling cherrypy tool

Signed-off-by: Ricardo Dias <rdias@suse.com>

diff --git a/src/pybind/mgr/dashboard/services/auth.py b/src/pybind/mgr/dashboard/services/auth.py
new file mode 100644 (file)
index 0000000..d07a6c3
--- /dev/null
+++ b/src/pybind/mgr/dashboard/services/auth.py
@@ -0,0 +1,78 @@
+# -*- coding: utf-8 -*-
+from __future__ import absolute_import
+
+import time
+
+import cherrypy
+
+from .access_control import LocalAuthenticator
+from .. import mgr, logger
+from ..tools import Session
+
+
+class AuthManager(object):
+    AUTH_PROVIDER = None
+
+    @classmethod
+    def initialize(cls):
+        cls.AUTH_PROVIDER = LocalAuthenticator()
+
+    @classmethod
+    def authenticate(cls, username, password):
+        return cls.AUTH_PROVIDER.authenticate(username, password)
+
+    @classmethod
+    def authorize(cls, username, scope, permissions):
+        return cls.AUTH_PROVIDER.authorize(username, scope, permissions)
+
+
+class AuthManagerTool(cherrypy.Tool):
+    def __init__(self):
+        super(AuthManagerTool, self).__init__(
+            'before_handler', self._check_authentication, priority=20)
+
+    def _check_authentication(self):
+        username = cherrypy.session.get(Session.USERNAME)
+        if not username:
+            logger.debug('Unauthorized access to %s',
+                         cherrypy.url(relative='server'))
+            raise cherrypy.HTTPError(401, 'You are not authorized to access '
+                                          'that resource')
+        now = time.time()
+        expires = float(mgr.get_config(
+            'session-expire', Session.DEFAULT_EXPIRE))
+        if expires > 0:
+            username_ts = cherrypy.session.get(Session.TS, None)
+            if username_ts and float(username_ts) < (now - expires):
+                cherrypy.session[Session.USERNAME] = None
+                cherrypy.session[Session.TS] = None
+                logger.debug('Session expired')
+                raise cherrypy.HTTPError(401,
+                                         'Session expired. You are not '
+                                         'authorized to access that resource')
+        cherrypy.session[Session.TS] = now
+
+        self._check_authorization(username)
+
+    def _check_authorization(self, username):
+        logger.debug("AMT: checking authorization...")
+        handler = cherrypy.request.handler.callable
+        controller = handler.__self__
+        sec_scope = getattr(controller, '_security_scope', None)
+        sec_perms = getattr(handler, '_security_permissions', None)
+        logger.debug("AMT: checking %s access to '%s' scope", sec_perms,
+                     sec_scope)
+
+        if not sec_scope:
+            # controller does not define any authorization restrictions
+            return
+
+        if not sec_perms:
+            logger.debug("Fail to check permission on: %s:%s", controller,
+                         handler)
+            raise cherrypy.HTTPError(403, "You don't have permissions to "
+                                          "access that resource")
+
+        if not AuthManager.authorize(username, sec_scope, sec_perms):
+            raise cherrypy.HTTPError(403, "You don't have permissions to "
+                                          "access that resource")