Create a readme file.

[philipp/winterrodeln/wradmin.git] / wradmin / lib / mediawiki.py

diff --git a/wradmin/lib/mediawiki.py b/wradmin/lib/mediawiki.py
index 5a31cf0898e44712d78250ad2f62f5d85184dff4..c083305f529ff83d9abcebeeec4b71dbdabe0da4 100644 (file)
--- a/wradmin/lib/mediawiki.py
+++ b/wradmin/lib/mediawiki.py
@@ -1,7 +1,6 @@
-#!/usr/bin/python2.6
-# -*- coding: iso-8859-15 -*-
+#!/usr/bin/python3.4
 # $Id$
-"MediaWiki communication functions"
+"""MediaWiki communication functions"""
 import datetime
 import re
 
@@ -12,7 +11,6 @@ import logging
 log = logging.getLogger(__name__)
 
 import wradmin.model as model
-import wradmin.model.validators
 
 
 # User management
@@ -51,21 +49,45 @@ class MediaWikiUsers(UsersReadOnly):
         con.close()
         log.info("%d users loaded from the MediaWiki database" % len(self.usernames))
     
-    
+    @staticmethod
+    def password_is_correct(password_plain, password_db):
+        """Returns true if a plain text password corresponds to the hash of the password as stored in the MediaWiki db.
+
+        :param password_plain: plain text password, e.g. 'abc'
+        :param password_db: complete password line as stored in the database, e.g. ':pbkdf2:sha256:10000:128:EXgVGhc2mAs710feKvkiaw==:J5fYth9pg/R2d0F8bSsYfTR8SBpTBNIcdv/DgJ0tOPC1rtajl2Dr0RLqOozLb8O0XpDhtv4a3JJd/M0b58WebfNWAcdJBJI9nNeC0EYYD7OCYZGVAaRhiYtK4m53KZBBL6x/k2j4RjHPT1NmgV8Fr1DPqBNOlOHxUIh5z5oslM4='
+        """
+        if not password_db.startswith(':'):
+            raise AuthKitError("Password entry in the database does have an unexpected format (does not start with ':').")
+        pwd_parts = password_db[1:].split(':')
+        pwd_type = pwd_parts[0]
+        if pwd_type == 'B':
+            # legacy
+            # example: password_db == ':B:d25b2886:41e46c952790b1b442aac4f24f7ea7a8'
+            # pwd_parts == ['B', 'd25b2886', '41e46c952790b1b442aac4f24f7ea7a8']
+            if len(pwd_parts) != 3:
+                raise AuthKitError("Password entry in the database does have an unexpected format (too few ':').")
+            salt, pwd_md5 = tuple(pwd_parts[1:3]) # salt = 'd25b2886'; pwd_md5 = '41e46c952790b1b442aac4f24f7ea7a8'
+            # log.info("user: '%s'; md5 of salt+' '+entered_pwd: '%s'; md5-part of DB-pwd: %s" % (username, md5(salt + '-' + md5(password)), pwd_md5))
+            return md5(salt + '-' + md5(password_plain)) == pwd_md5
+        elif pwd_type == 'pbkdf2':
+            if len(pwd_parts) != 6:
+                raise AuthKitError("Password entry in the database does have an unexpected format (too few ':').")
+            _, algorithm, rounds, num_bit, salt, pwd_hash = pwd_parts
+            from base64 import b64decode, b64encode
+            from hashlib import pbkdf2_hmac
+            salt = b64decode(salt)
+            hash = pbkdf2_hmac(algorithm, password_plain, salt, int(rounds), int(num_bit))
+            hash = b64encode(hash)
+            return hash == pwd_hash
+
+
     def user_has_password(self, username, password):
         """
         Passwords are case sensitive.
-        Returns ``True`` if the user has the password specified, ``False`` otherwise. 
+        Returns ``True`` if the user has the password specified, ``False`` otherwise.
         Raises an exception if the user doesn't exist.
-        
+
         See http://www.winterrodeln.org/trac/wiki/MediaWikiAuthorization
         """
-        pwd = self.user_password(username)
-        # Example: pwd = ':B:d25b2886:41e46c952790b1b442aac4f24f7ea7a8'
-        pwd_parts = pwd.split(':') # password_parts = ['', 'B', 'd25b2886', '41e46c952790b1b442aac4f24f7ea7a8']
-        if len(pwd_parts) == 4 and pwd_parts[1] == 'B':
-            salt, pwd_md5 = tuple(pwd_parts[2:4]) # salt = 'd25b2886'; pwd_md5 = '41e46c952790b1b442aac4f24f7ea7a8'
-        else:
-            raise AuthKitError("Password in the MediaWiki database format has an unexpected format ('%s' instead of e.g. ':B:d25b2886:41e46c952790b1b442aac4f24f7ea7a8')" % pwd)
-        # log.info("user: '%s'; md5 of salt+' '+entered_pwd: '%s'; md5-part of DB-pwd: %s" % (username, md5(salt + '-' + md5(password)), pwd_md5))
-        return md5(salt + '-' + md5(password)) == pwd_md5
+        password_db = self.user_password(username)
+        return self.password_is_correct(password, password_db)