Adding NSI operations (Create, Read, Delete)
[osm/NBI.git] / osm_nbi / auth.py
index 4ee9ce2..a734b46 100644 (file)
@@ -9,18 +9,21 @@ list inside the projects that they are inserted
 __author__ = "Eduardo Sousa <esousa@whitestack.com>"
 __date__ = "$27-jul-2018 23:59:59$"
 
 __author__ = "Eduardo Sousa <esousa@whitestack.com>"
 __date__ = "$27-jul-2018 23:59:59$"
 
+import cherrypy
 import logging
 from base64 import standard_b64decode
 from copy import deepcopy
 from functools import reduce
 import logging
 from base64 import standard_b64decode
 from copy import deepcopy
 from functools import reduce
+from hashlib import sha256
 from http import HTTPStatus
 from http import HTTPStatus
+from random import choice as random_choice
 from time import time
 
 from time import time
 
-import cherrypy
-
 from authconn import AuthException
 from authconn_keystone import AuthconnKeystone
 from authconn import AuthException
 from authconn_keystone import AuthconnKeystone
-from engine import EngineException
+from osm_common import dbmongo
+from osm_common import dbmemory
+from osm_common.dbbase import DbException
 
 
 class Authenticator:
 
 
 class Authenticator:
@@ -31,19 +34,11 @@ class Authenticator:
     RBAC model to manage permissions on operations.
     """
 
     RBAC model to manage permissions on operations.
     """
 
-    def __init__(self, engine):
+    def __init__(self):
         """
         Authenticator initializer. Setup the initial state of the object,
         while it waits for the config dictionary and database initialization.
         """
         Authenticator initializer. Setup the initial state of the object,
         while it waits for the config dictionary and database initialization.
-
-        Note: engine is only here until all the calls can to it can be replaced.
-
-        :param engine: reference to engine object used.
         """
         """
-        super().__init__()
-
-        self.engine = engine
-
         self.backend = None
         self.config = None
         self.db = None
         self.backend = None
         self.config = None
         self.db = None
@@ -67,17 +62,31 @@ class Authenticator:
                 elif config["authentication"]["backend"] == "internal":
                     pass
                 else:
                 elif config["authentication"]["backend"] == "internal":
                     pass
                 else:
-                    raise Exception("No authentication backend defined")
+                    raise AuthException("Unknown authentication backend: {}"
+                                        .format(config["authentication"]["backend"]))
             if not self.db:
             if not self.db:
-                pass
-                # TODO: Implement database initialization
-                # NOTE: Database needed to store the mappings
+                if config["database"]["driver"] == "mongo":
+                    self.db = dbmongo.DbMongo()
+                    self.db.db_connect(config["database"])
+                elif config["database"]["driver"] == "memory":
+                    self.db = dbmemory.DbMemory()
+                    self.db.db_connect(config["database"])
+                else:
+                    raise AuthException("Invalid configuration param '{}' at '[database]':'driver'"
+                                        .format(config["database"]["driver"]))
         except Exception as e:
             raise AuthException(str(e))
 
         except Exception as e:
             raise AuthException(str(e))
 
-    def init_db(self, target_version='1.0'):
+    def stop(self):
+        try:
+            if self.db:
+                self.db.db_disconnect()
+        except DbException as e:
+            raise AuthException(str(e), http_code=e.http_code)
+
+    def init_db(self, target_version='1.1'):
         """
         """
-        Check if the database has been initialized. If not, create the required tables
+        Check if the database has been initialized, with at least one user. If not, create an adthe required tables
         and insert the predefined mappings between roles and permissions.
 
         :param target_version: schema version that should be present in the database.
         and insert the predefined mappings between roles and permissions.
 
         :param target_version: schema version that should be present in the database.
@@ -116,7 +125,7 @@ class Authenticator:
                     token = outdata["id"]
                     cherrypy.session['Authorization'] = token
             if self.config["authentication"]["backend"] == "internal":
                     token = outdata["id"]
                     cherrypy.session['Authorization'] = token
             if self.config["authentication"]["backend"] == "internal":
-                return self.engine.authorize(token)
+                return self._internal_authorize(token)
             else:
                 try:
                     self.backend.validate_token(token)
             else:
                 try:
                     self.backend.validate_token(token)
@@ -124,7 +133,7 @@ class Authenticator:
                 except AuthException:
                     self.del_token(token)
                     raise
                 except AuthException:
                     self.del_token(token)
                     raise
-        except EngineException as e:
+        except AuthException as e:
             if cherrypy.session.get('Authorization'):
                 del cherrypy.session['Authorization']
             cherrypy.response.headers["WWW-Authenticate"] = 'Bearer realm="{}"'.format(e)
             if cherrypy.session.get('Authorization'):
                 del cherrypy.session['Authorization']
             cherrypy.response.headers["WWW-Authenticate"] = 'Bearer realm="{}"'.format(e)
@@ -132,7 +141,7 @@ class Authenticator:
 
     def new_token(self, session, indata, remote):
         if self.config["authentication"]["backend"] == "internal":
 
     def new_token(self, session, indata, remote):
         if self.config["authentication"]["backend"] == "internal":
-            return self.engine.new_token(session, indata, remote)
+            return self._internal_new_token(session, indata, remote)
         else:
             if indata.get("username"):
                 token, projects = self.backend.authenticate_with_user_password(
         else:
             if indata.get("username"):
                 token, projects = self.backend.authenticate_with_user_password(
@@ -163,7 +172,7 @@ class Authenticator:
                 "_id": token,
                 "id": token,
                 "issued_at": now,
                 "_id": token,
                 "id": token,
                 "issued_at": now,
-                "expires": now+3600,
+                "expires": now + 3600,
                 "project_id": project_id,
                 "username": indata.get("username") if not session else session.get("username"),
                 "remote_port": remote.port,
                 "project_id": project_id,
                 "username": indata.get("username") if not session else session.get("username"),
                 "remote_port": remote.port,
@@ -181,29 +190,122 @@ class Authenticator:
 
     def get_token_list(self, session):
         if self.config["authentication"]["backend"] == "internal":
 
     def get_token_list(self, session):
         if self.config["authentication"]["backend"] == "internal":
-            return self.engine.get_token_list(session)
+            return self._internal_get_token_list(session)
         else:
             return [deepcopy(token) for token in self.tokens.values()
                     if token["username"] == session["username"]]
 
     def get_token(self, session, token):
         if self.config["authentication"]["backend"] == "internal":
         else:
             return [deepcopy(token) for token in self.tokens.values()
                     if token["username"] == session["username"]]
 
     def get_token(self, session, token):
         if self.config["authentication"]["backend"] == "internal":
-            return self.engine.get_token(session, token)
+            return self._internal_get_token(session, token)
         else:
             token_value = self.tokens.get(token)
             if not token_value:
         else:
             token_value = self.tokens.get(token)
             if not token_value:
-                raise EngineException("token not found", http_code=HTTPStatus.NOT_FOUND)
+                raise AuthException("token not found", http_code=HTTPStatus.NOT_FOUND)
             if token_value["username"] != session["username"] and not session["admin"]:
             if token_value["username"] != session["username"] and not session["admin"]:
-                raise EngineException("needed admin privileges", http_code=HTTPStatus.UNAUTHORIZED)
+                raise AuthException("needed admin privileges", http_code=HTTPStatus.UNAUTHORIZED)
             return token_value
 
     def del_token(self, token):
         if self.config["authentication"]["backend"] == "internal":
             return token_value
 
     def del_token(self, token):
         if self.config["authentication"]["backend"] == "internal":
-            return self.engine.del_token(token)
+            return self._internal_del_token(token)
         else:
             try:
                 self.backend.revoke_token(token)
                 del self.tokens[token]
                 return "token '{}' deleted".format(token)
             except KeyError:
         else:
             try:
                 self.backend.revoke_token(token)
                 del self.tokens[token]
                 return "token '{}' deleted".format(token)
             except KeyError:
-                raise EngineException("Token '{}' not found".format(token), http_code=HTTPStatus.NOT_FOUND)
+                raise AuthException("Token '{}' not found".format(token), http_code=HTTPStatus.NOT_FOUND)
+
+    def _internal_authorize(self, token):
+        try:
+            if not token:
+                raise AuthException("Needed a token or Authorization http header", http_code=HTTPStatus.UNAUTHORIZED)
+            if token not in self.tokens:
+                raise AuthException("Invalid token or Authorization http header", http_code=HTTPStatus.UNAUTHORIZED)
+            session = self.tokens[token]
+            now = time()
+            if session["expires"] < now:
+                del self.tokens[token]
+                raise AuthException("Expired Token or Authorization http header", http_code=HTTPStatus.UNAUTHORIZED)
+            return session
+        except AuthException:
+            if self.config["global"].get("test.user_not_authorized"):
+                return {"id": "fake-token-id-for-test",
+                        "project_id": self.config["global"].get("test.project_not_authorized", "admin"),
+                        "username": self.config["global"]["test.user_not_authorized"]}
+            else:
+                raise
+
+    def _internal_new_token(self, session, indata, remote):
+        now = time()
+        user_content = None
+
+        # Try using username/password
+        if indata.get("username"):
+            user_rows = self.db.get_list("users", {"username": indata.get("username")})
+            user_content = None
+            if user_rows:
+                user_content = user_rows[0]
+                salt = user_content["_admin"]["salt"]
+                shadow_password = sha256(indata.get("password", "").encode('utf-8') + salt.encode('utf-8')).hexdigest()
+                if shadow_password != user_content["password"]:
+                    user_content = None
+            if not user_content:
+                raise AuthException("Invalid username/password", http_code=HTTPStatus.UNAUTHORIZED)
+        elif session:
+            user_rows = self.db.get_list("users", {"username": session["username"]})
+            if user_rows:
+                user_content = user_rows[0]
+            else:
+                raise AuthException("Invalid token", http_code=HTTPStatus.UNAUTHORIZED)
+        else:
+            raise AuthException("Provide credentials: username/password or Authorization Bearer token",
+                                http_code=HTTPStatus.UNAUTHORIZED)
+
+        token_id = ''.join(random_choice('abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789')
+                           for _ in range(0, 32))
+        if indata.get("project_id"):
+            project_id = indata.get("project_id")
+            if project_id not in user_content["projects"]:
+                raise AuthException("project {} not allowed for this user"
+                                    .format(project_id), http_code=HTTPStatus.UNAUTHORIZED)
+        else:
+            project_id = user_content["projects"][0]
+        if project_id == "admin":
+            session_admin = True
+        else:
+            project = self.db.get_one("projects", {"_id": project_id})
+            session_admin = project.get("admin", False)
+        new_session = {"issued_at": now, "expires": now + 3600,
+                       "_id": token_id, "id": token_id, "project_id": project_id, "username": user_content["username"],
+                       "remote_port": remote.port, "admin": session_admin}
+        if remote.name:
+            new_session["remote_host"] = remote.name
+        elif remote.ip:
+            new_session["remote_host"] = remote.ip
+
+        self.tokens[token_id] = new_session
+        return deepcopy(new_session)
+
+    def _internal_get_token_list(self, session):
+        token_list = []
+        for token_id, token_value in self.tokens.items():
+            if token_value["username"] == session["username"]:
+                token_list.append(deepcopy(token_value))
+        return token_list
+
+    def _internal_get_token(self, session, token_id):
+        token_value = self.tokens.get(token_id)
+        if not token_value:
+            raise AuthException("token not found", http_code=HTTPStatus.NOT_FOUND)
+        if token_value["username"] != session["username"] and not session["admin"]:
+            raise AuthException("needed admin privileges", http_code=HTTPStatus.UNAUTHORIZED)
+        return token_value
+
+    def _internal_del_token(self, token_id):
+        try:
+            del self.tokens[token_id]
+            return "token '{}' deleted".format(token_id)
+        except KeyError:
+            raise AuthException("Token '{}' not found".format(token_id), http_code=HTTPStatus.NOT_FOUND)