mirror of
https://gitlab.gnome.org/GNOME/libsecret.git
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272 lines
8.9 KiB
Python
272 lines
8.9 KiB
Python
#!/usr/bin/env python
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#
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# Copyright 2011 Stef Walter
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Lesser General Public License as published
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# by the Free Software Foundation; either version 2 of the licence or (at
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# your option) any later version.
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#
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# See the included COPYING file for more information.
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#
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import os
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import sys
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import getopt
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import unittest
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import aes
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import dh
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import hkdf
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import dbus
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import dbus.service
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import dbus.glib
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import gobject
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COLLECTION_PREFIX = "/org/freedesktop/secrets/collection/"
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bus_name = 'org.freedesktop.Secret.MockService'
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objects = { }
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class NotSupported(dbus.exceptions.DBusException):
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def __init__(self, msg):
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dbus.exceptions.DBusException.__init__(self, msg, name="org.freedesktop.DBus.Error.NotSupported")
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class InvalidArgs(dbus.exceptions.DBusException):
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def __init__(self, msg):
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dbus.exceptions.DBusException.__init__(self, msg, name="org.freedesktop.DBus.Error.InvalidArgs")
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class IsLocked(dbus.exceptions.DBusException):
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def __init__(self, msg):
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dbus.exceptions.DBusException.__init__(self, msg, name="org.freedesktop.Secret.Error.IsLocked")
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unique_identifier = 0
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def next_identifier():
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global unique_identifier
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unique_identifier += 1
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return unique_identifier
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def hex_encode(string):
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return "".join([hex(ord(c))[2:].zfill(2) for c in string])
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class PlainAlgorithm():
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def negotiate(self, service, sender, param):
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if type (param) != dbus.String:
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raise InvalidArgs("invalid argument passed to OpenSession")
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session = SecretSession(service, sender, self, None)
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return (dbus.String("", variant_level=1), session)
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def encrypt(self, key, data):
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return ("", data)
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class AesAlgorithm():
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def negotiate(self, service, sender, param):
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if type (param) != dbus.ByteArray:
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raise InvalidArgs("invalid argument passed to OpenSession")
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privat, publi = dh.generate_pair()
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peer = dh.bytes_to_number(param)
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# print "mock publi: ", hex(publi)
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# print " mock peer: ", hex(peer)
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ikm = dh.derive_key(privat, peer)
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# print " mock ikm: ", hex_encode(ikm)
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key = hkdf.hkdf(ikm, 16)
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# print " mock key: ", hex_encode(key)
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session = SecretSession(service, sender, self, key)
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return (dbus.ByteArray(dh.number_to_bytes(publi), variant_level=1), session)
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def encrypt(self, key, data):
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key = map(ord, key)
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data = aes.append_PKCS7_padding(data)
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keysize = len(key)
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iv = [ord(i) for i in os.urandom(16)]
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mode = aes.AESModeOfOperation.modeOfOperation["CBC"]
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moo = aes.AESModeOfOperation()
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(mode, length, ciph) = moo.encrypt(data, mode, key, keysize, iv)
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return ("".join([chr(i) for i in iv]),
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"".join([chr(i) for i in ciph]))
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class SecretSession(dbus.service.Object):
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def __init__(self, service, sender, algorithm, key):
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self.sender = sender
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self.service = service
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self.algorithm = algorithm
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self.key = key
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self.path = "/org/freedesktop/secrets/sessions/%d" % next_identifier()
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dbus.service.Object.__init__(self, service.bus_name, self.path)
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service.add_session(self)
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objects[self.path] = self
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def encode_secret(self, secret, content_type):
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(params, data) = self.algorithm.encrypt(self.key, secret)
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# print " mock iv: ", hex_encode(params)
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# print " mock ciph: ", hex_encode(data)
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return dbus.Struct((self.path, dbus.ByteArray(params), dbus.ByteArray(data),
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dbus.String(content_type)), signature="oayays")
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@dbus.service.method('org.freedesktop.Secret.Session')
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def Close(self):
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self.remove_from_connection()
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self.service.remove_session(self)
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class SecretItem(dbus.service.Object):
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def __init__(self, collection, identifier, label="Item", attributes={ },
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secret="", content_type="text/plain"):
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self.collection = collection
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self.identifier = identifier
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self.label = label
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self.secret = secret
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self.attributes = attributes
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self.content_type = content_type
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self.locked = collection.locked
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self.path = "%s/%s" % (collection.path, identifier)
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dbus.service.Object.__init__(self, collection.service.bus_name, self.path)
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collection.items[identifier] = self
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objects[self.path] = self
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def match_attributes(self, attributes):
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for (key, value) in attributes.items():
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if not self.attributes.get(key) == value:
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return False
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return True
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@dbus.service.method('org.freedesktop.Secret.Item', sender_keyword='sender')
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def GetSecret(self, session_path, sender=None):
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session = objects.get(session_path, None)
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if not session or session.sender != sender:
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raise InvalidArgs("session invalid: %s" % session_path)
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if self.locked:
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raise IsLocked("secret is locked: %s" % self.path)
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return session.encode_secret(self.secret, self.content_type)
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class SecretCollection(dbus.service.Object):
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def __init__(self, service, identifier, label="Collection", locked=False):
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self.service = service
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self.identifier = identifier
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self.label = label
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self.locked = locked
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self.items = { }
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self.path = "%s%s" % (COLLECTION_PREFIX, identifier)
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dbus.service.Object.__init__(self, service.bus_name, self.path)
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service.collections[identifier] = self
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objects[self.path] = self
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def search_items(self, attributes):
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results = []
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for item in self.items.values():
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if item.match_attributes(attributes):
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results.append(item)
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return results
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class SecretService(dbus.service.Object):
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algorithms = {
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'plain': PlainAlgorithm(),
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"dh-ietf1024-sha256-aes128-cbc-pkcs7": AesAlgorithm(),
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}
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def __init__(self, name=None):
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if name == None:
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name = bus_name
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bus = dbus.SessionBus()
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self.bus_name = dbus.service.BusName(name, allow_replacement=True, replace_existing=True)
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dbus.service.Object.__init__(self, self.bus_name, '/org/freedesktop/secrets')
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self.sessions = { }
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self.collections = { }
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def on_name_owner_changed(owned, old_owner, new_owner):
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if not new_owner:
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for session in list(self.sessions.get(old_owner, [])):
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session.Close()
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bus.add_signal_receiver(on_name_owner_changed,
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'NameOwnerChanged',
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'org.freedesktop.DBus')
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def add_standard_objects(self):
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collection = SecretCollection(self, "collection", locked=False)
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SecretItem(collection, "item_one", attributes={ "number": "1", "string": "one", "parity": "odd" }, secret="uno")
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SecretItem(collection, "item_two", attributes={ "number": "2", "string": "two", "parity": "even" }, secret="dos")
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SecretItem(collection, "item_three", attributes={ "number": "3", "string": "three", "parity": "odd" }, secret="tres")
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collection = SecretCollection(self, "second", locked=True)
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SecretItem(collection, "item_one", attributes={ "number": "1", "string": "one", "parity": "odd" })
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SecretItem(collection, "item_two", attributes={ "number": "2", "string": "two", "parity": "even" })
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SecretItem(collection, "item_three", attributes={ "number": "3", "string": "three", "parity": "odd" })
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def listen(self):
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loop = gobject.MainLoop()
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loop.run()
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def add_session(self, session):
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if session.sender not in self.sessions:
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self.sessions[session.sender] = []
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self.sessions[session.sender].append(session)
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def remove_session(self, session):
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self.sessions[session.sender].remove(session)
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def find_item(self, object):
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if object.startswith(COLLECTION_PREFIX):
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parts = object[len(COLLECTION_PREFIX):].split("/", 1)
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if len(parts) == 2 and parts[0] in self.collections:
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return self.collections[parts[0]].get(parts[1], None)
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return None
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@dbus.service.method('org.freedesktop.Secret.Service', byte_arrays=True, sender_keyword='sender')
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def OpenSession(self, algorithm, param, sender=None):
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assert type(algorithm) == dbus.String
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if algorithm not in self.algorithms:
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raise NotSupported("algorithm %s is not supported" % algorithm)
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return self.algorithms[algorithm].negotiate(self, sender, param)
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@dbus.service.method('org.freedesktop.Secret.Service')
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def SearchItems(self, attributes):
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locked = [ ]
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unlocked = [ ]
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items = [ ]
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for collection in self.collections.values():
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items = collection.search_items(attributes)
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if collection.locked:
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locked.extend(items)
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else:
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unlocked.extend(items)
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return (dbus.Array(unlocked, "o"), dbus.Array(locked, "o"))
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@dbus.service.method('org.freedesktop.Secret.Service', sender_keyword='sender')
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def GetSecrets(self, item_paths, session_path, sender=None):
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session = objects.get(session_path, None)
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if not session or session.sender != sender:
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raise InvalidArgs("session invalid: %s" % session_path)
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results = dbus.Dictionary(signature="o(oayays)")
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for item_path in item_paths:
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item = objects.get(item_path, None)
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if item and not item.locked:
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results[item_path] = item.GetSecret(session_path, sender)
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return results
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def parse_options(args):
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global bus_name
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try:
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opts, args = getopt.getopt(args, "name", ["name="])
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except getopt.GetoptError, err:
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print str(err)
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sys.exit(2)
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for o, a in opts:
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if o in ("--name"):
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bus_name = a
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else:
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assert False, "unhandled option"
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return args
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parse_options(sys.argv[1:])
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