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Commit 38979178 authored by Andreas Valder's avatar Andreas Valder
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added CSRF protection, closes #75

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GNU GENERAL PUBLIC LICENSE
Version 2, June 1991
Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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END OF TERMS AND CONDITIONS
How to Apply These Terms to Your New Programs
If you develop a new program, and you want it to be of the greatest
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<one line to give the program's name and a brief idea of what it does.>
Copyright (C) <year> <name of author>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
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with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
Also add information on how to contact you by electronic and paper mail.
If the program is interactive, make it output a short notice like this
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Gnomovision version 69, Copyright (C) year name of author
Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.
The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License. Of course, the commands you use may
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You should also get your employer (if you work as a programmer) or your
school, if any, to sign a "copyright disclaimer" for the program, if
necessary. Here is a sample; alter the names:
Yoyodyne, Inc., hereby disclaims all copyright interest in the program
`Gnomovision' (which makes passes at compilers) written by James Hacker.
<signature of Ty Coon>, 1 April 1989
Ty Coon, President of Vice
This General Public License does not permit incorporating your program into
proprietary programs. If your program is a subroutine library, you may
consider it more useful to permit linking proprietary applications with the
library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License.
\ No newline at end of file
README.md
+ 0
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......@@ -32,18 +32,3 @@ Optional (wird für einzelne Features benötigt):
* python-ldap (Login mit Fachschaftsaccount)
* python-icalendar (SoGo-Kalenderimport für Sitzungsankündigungen)
* python-mysql-connector (wenn MySQL als Datenbank verwendet werden soll)
# Lizenz
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License Version 2
as published by the Free Software Foundation;
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
server.py
+ 23
− 3
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......@@ -9,6 +9,7 @@ import hashlib
import random
import sched
import traceback
import string
app = Flask(__name__)
......@@ -70,6 +71,21 @@ def mod_required(func):
return func(*args, **kwargs)
return decorator
def csrf_protect(func):
@wraps(func)
def decorator(*args, **kwargs):
if '_csrf_token' in request.values:
token = request.values['_csrf_token']
elif '_csrf_token' in request.get_json():
token = request.get_json()['_csrf_token']
else:
token = none
if not ('_csrf_token' in session) or (session['_csrf_token'] != token ) or not token:
return 'csrf test failed', 403
else:
return func(*args, **kwargs)
return decorator
def evalperm(perms):
cperms = []
lperms = []
......@@ -379,6 +395,7 @@ def login():
modify('INSERT INTO users (name, realname, fsacc, level, calendar_key, rfc6238) VALUES (?, ?, ?, 1, "", "")', user, session['user']['givenName'], user)
dbuser = query('SELECT * FROM users WHERE name = ?', user)
session['user']['dbid'] = dbuser[0]['id']
session['_csrf_token'] = ''.join(random.SystemRandom().choice(string.ascii_letters + string.digits) for _ in range(128))
return redirect(request.values.get('ref', url_for('index')))
@app.route('/logout', methods=['GET', 'POST'])
......@@ -412,10 +429,12 @@ tabs = {
@app.route('/edit', methods=['GET', 'POST'])
@mod_required
@csrf_protect
def edit(prefix='', ignore=[]):
# All editable tables are expected to have a 'time_updated' field
ignore.append('ref')
ignore.append('prefix')
ignore.append('_csrf_token')
if not prefix and 'prefix' in request.args:
prefix = request.args['prefix']
modify('BEGIN')
......@@ -439,6 +458,7 @@ def edit(prefix='', ignore=[]):
@app.route('/new/<table>', methods=['GET', 'POST'])
@mod_required
@csrf_protect
def create(table):
assert table in tabs
defaults = {'created_by': session['user']['dbid'], 'time_created': datetime.now(), 'time_updated': datetime.now()}
......@@ -450,9 +470,9 @@ def create(table):
values.append(val)
args = request.values
if (request.method == 'POST') and (request.get_json()):
args = request.get_json()
for column, val in args.items():
if column == 'ref':
args = request.get_json().items()
for column, val in args:
if (column == 'ref') or (column == '_csrf_token'):
continue
assert column in tabs[table][2]+tabs[table][3]
assert column not in defaults
......
static/moderator.js
+ 7
− 0
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var moderator = {
api: {
csrf_token: '',
init: function () {
},
......@@ -9,6 +10,7 @@ var moderator = {
moderator.api.set_multi(req,reload)
},
set_multi: function(dict,reload) {
dict['_csrf_token'] = moderator.api.csrf_token;
$.ajax({
method: "POST",
url: "/edit",
......@@ -23,6 +25,7 @@ var moderator = {
});
},
add_new: function(value,type,reload) {
value['_csrf_token'] = moderator.api.csrf_token;
$.ajax({
method: "POST",
url: "/new/"+type,
......@@ -42,7 +45,11 @@ var moderator = {
url: url,
dataType: "text",
})
},
setcsrftoken: function (token) {
moderator.api.csrf_token = token;
}
},
editor: {
init: function() {
......
templates/base.html
+ 2
− 1
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......@@ -147,7 +147,8 @@
{% if ismod() %}
<script>
$( function () {
moderator.permissioneditor.setpermissions({{global_permissions|tojson|safe}});
moderator.permissioneditor.setpermissions({{global_permissions|tojson|safe}});
moderator.api.setcsrftoken('{{ session['_csrf_token'] }}');
});
</script>
{% endif %}
......
templates/course.html
+ 1
− 1
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......@@ -6,7 +6,7 @@
{% from 'macros.html' import moderator_permissioneditor %}
{% extends "base.html" %}
{% block title %} - {{course.title}}{% endblock %}
{% block title %}- {{course.title}}{% endblock %}
{% block content %}
<div class="panel panel-default">
<div class="panel-heading">
......
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