From 3ebb6be0c628b3a2b45a28690b6b6dc1bb2ae850 Mon Sep 17 00:00:00 2001 From: Ruben Pollan Date: Sun, 12 Oct 2014 03:21:47 -0500 Subject: Basic validation levels support --- src/leap/keymanager/__init__.py | 96 ++++++++--- src/leap/keymanager/errors.py | 6 + src/leap/keymanager/keys.py | 16 +- src/leap/keymanager/openpgp.py | 3 +- src/leap/keymanager/tests/__init__.py | 236 +++++++++++++++++++++++++++ src/leap/keymanager/tests/test_keymanager.py | 234 ++------------------------ src/leap/keymanager/tests/test_validation.py | 150 +++++++++++++++++ src/leap/keymanager/validation.py | 94 +++++++++++ 8 files changed, 594 insertions(+), 241 deletions(-) create mode 100644 src/leap/keymanager/tests/test_validation.py create mode 100644 src/leap/keymanager/validation.py (limited to 'src') diff --git a/src/leap/keymanager/__init__.py b/src/leap/keymanager/__init__.py index c3423d9..156aaf8 100644 --- a/src/leap/keymanager/__init__.py +++ b/src/leap/keymanager/__init__.py @@ -48,7 +48,12 @@ from leap.common.events import signal from leap.common.events import events_pb2 as proto from leap.common.decorators import memoized_method -from leap.keymanager.errors import KeyNotFound, KeyAttributesDiffer +from leap.keymanager.errors import ( + KeyNotFound, + KeyAddressMismatch, + KeyNotValidUpgrade +) +from leap.keymanager.validation import ValidationLevel, can_upgrade from leap.keymanager.keys import ( EncryptionKey, @@ -208,8 +213,11 @@ class KeyManager(object): server_keys = res.json() # insert keys in local database if self.OPENPGP_KEY in server_keys: - self._wrapper_map[OpenPGPKey].put_ascii_key( - server_keys['openpgp']) + self.put_raw_key( + server_keys['openpgp'], + OpenPGPKey, + address=address, + validation=ValidationLevel.Provider_Trust) except requests.exceptions.HTTPError as e: if e.response.status_code == 404: raise KeyNotFound(address) @@ -230,7 +238,7 @@ class KeyManager(object): replace any prior keys for the same address in its database. :param ktype: The type of the key. - :type ktype: KeyType + :type ktype: subclass of EncryptionKey :raise KeyNotFound: If the key was not found in local database. """ @@ -260,7 +268,7 @@ class KeyManager(object): :param address: The address bound to the key. :type address: str :param ktype: The type of the key. - :type ktype: KeyType + :type ktype: subclass of EncryptionKey :param private: Look for a private key instead of a public one? :type private: bool :param fetch_remote: If key not found in local storage try to fetch @@ -323,7 +331,7 @@ class KeyManager(object): Generate a key of type C{ktype} bound to the user's address. :param ktype: The type of the key. - :type ktype: KeyType + :type ktype: subclass of EncryptionKey :return: The generated key. :rtype: EncryptionKey @@ -515,32 +523,74 @@ class KeyManager(object): """ Put C{key} in local storage. - :param key: The key to be stored. It can be ascii key or an OpenPGPKey - :type key: str or OpenPGPKey + :param key: The key to be stored + :type key: EncryptionKey + :raises KeyNotValidUpdate: if a key with the same uid exists and the + new one is not a valid update for it """ try: - if isinstance(key, basestring): - self._wrapper_map[OpenPGPKey].put_ascii_key(key) - else: + old_key = self._wrapper_map[type(key)].get_key(key.address, + private=key.private) + except KeyNotFound: + old_key = None + + if key.private or can_upgrade(key, old_key): + try: self._wrapper_map[type(key)].put_key(key) - except IndexError as e: - leap_assert(False, "Unsupported key type. Error {0!r}".format(e)) + except IndexError as e: + leap_assert( + False, "Unsupported key type. Error {0!r}".format(e)) + else: + raise KeyNotValidUpgrade("Key %s can not be upgraded by new key %s" + % (old_key.key_id, key.key_id)) - def fetch_key(self, address, uri, ktype): + def put_raw_key(self, key, ktype, address=None, + validation=ValidationLevel.Weak_Chain): + """ + Put C{key} in local storage. + + :param key: The ascii key to be stored + :type key: str + :param ktype: the type of the key. + :type ktype: subclass of EncryptionKey + :param address: if set used to check that the key is for this address + :type address: str + :param validation: validation level for this key + (default: 'Weak_Chain') + :type validation: ValidationLevel + + :raises KeyAddressMismatch: if address doesn't match any uid on the key + :raises KeyNotValidUpdate: if a key with the same uid exists and the + new one is not a valid update for it + """ + pubkey, _ = self._wrapper_map[ktype].parse_ascii_key(key) + if address is not None and address != pubkey.address: + raise KeyAddressMismatch("Key UID %s, but expected %s" + % (pubkey.address, address)) + + pubkey.validation = validation + self.put_key(pubkey) + + def fetch_key(self, address, uri, ktype, + validation=ValidationLevel.Weak_Chain): """ Fetch a public key for C{address} from the network and put it in local storage. - Raises C{openpgp.errors.KeyNotFound} if not valid key on C{uri}. - Raises C{openpgp.errors.KeyAttributesDiffer} if address don't match - any uid on the key. - :param address: The email address of the key. :type address: str :param uri: The URI of the key. :type uri: str - :param ktype: The type of the key. - :type ktype: KeyType + :param ktype: the type of the key. + :type ktype: subclass of EncryptionKey + :param validation: validation level for this key + (default: 'Weak_Chain') + :type validation: ValidationLevel + + :raises KeyNotFound: if not valid key on C{uri} + :raises KeyAddressMismatch: if address doesn't match any uid on the key + :raises KeyNotValidUpdate: if a key with the same uid exists and the + new one is not a valid update for it """ res = self._get(uri) if not res.ok: @@ -551,8 +601,10 @@ class KeyManager(object): if pubkey is None: raise KeyNotFound(uri) if pubkey.address != address: - raise KeyAttributesDiffer("UID %s found, but expected %s" - % (pubkey.address, address)) + raise KeyAddressMismatch("UID %s found, but expected %s" + % (pubkey.address, address)) + + pubkey.validation = validation self.put_key(pubkey) from ._version import get_versions diff --git a/src/leap/keymanager/errors.py b/src/leap/keymanager/errors.py index ebe4fd5..f896582 100644 --- a/src/leap/keymanager/errors.py +++ b/src/leap/keymanager/errors.py @@ -96,3 +96,9 @@ class KeyFingerprintMismatch(Exception): """ A mismatch between fingerprints. """ + + +class KeyNotValidUpgrade(Exception): + """ + Already existing key can not be upgraded with the new key + """ diff --git a/src/leap/keymanager/keys.py b/src/leap/keymanager/keys.py index ec1bfeb..ecb0a36 100644 --- a/src/leap/keymanager/keys.py +++ b/src/leap/keymanager/keys.py @@ -25,12 +25,17 @@ try: import simplejson as json except ImportError: import json # noqa +import logging import re from abc import ABCMeta, abstractmethod from leap.common.check import leap_assert +from leap.keymanager.validation import ValidationLevel, toValidationLevel + +logger = logging.getLogger(__name__) + # # Dictionary keys used for storing cryptographic keys. @@ -106,6 +111,13 @@ def build_key_from_dict(kClass, address, kdict): leap_assert( address == kdict[KEY_ADDRESS_KEY], 'Wrong address in key data.') + try: + validation = toValidationLevel(kdict[KEY_VALIDATION_KEY]) + except ValueError: + logger.error("Not valid validation level (%s) for key %s", + (kdict[KEY_VALIDATION_KEY], kdict[KEY_ID_KEY])) + validation = ValidationLevel.Weak_Chain + return kClass( address, key_id=kdict[KEY_ID_KEY], @@ -116,7 +128,7 @@ def build_key_from_dict(kClass, address, kdict): expiry_date=kdict[KEY_EXPIRY_DATE_KEY], first_seen_at=kdict[KEY_FIRST_SEEN_AT_KEY], last_audited_at=kdict[KEY_LAST_AUDITED_AT_KEY], - validation=kdict[KEY_VALIDATION_KEY], # TODO: verify for validation. + validation=validation, ) @@ -173,7 +185,7 @@ class EncryptionKey(object): KEY_PRIVATE_KEY: self.private, KEY_LENGTH_KEY: self.length, KEY_EXPIRY_DATE_KEY: self.expiry_date, - KEY_VALIDATION_KEY: self.validation, + KEY_VALIDATION_KEY: str(self.validation), KEY_FIRST_SEEN_AT_KEY: self.first_seen_at, KEY_LAST_AUDITED_AT_KEY: self.last_audited_at, KEY_TAGS_KEY: [KEYMANAGER_KEY_TAG], diff --git a/src/leap/keymanager/openpgp.py b/src/leap/keymanager/openpgp.py index 6a825cd..57a7754 100644 --- a/src/leap/keymanager/openpgp.py +++ b/src/leap/keymanager/openpgp.py @@ -38,6 +38,7 @@ from leap.keymanager.keys import ( KEYMANAGER_KEY_TAG, TAGS_ADDRESS_PRIVATE_INDEX, ) +from leap.keymanager.validation import ValidationLevel logger = logging.getLogger(__name__) @@ -183,7 +184,7 @@ def _build_key_from_gpg(address, key, key_data): private=True if key['type'] == 'sec' else False, length=key['length'], expiry_date=key['expires'], - validation=None, # TODO: verify for validation. + validation=ValidationLevel.Weak_Chain, ) diff --git a/src/leap/keymanager/tests/__init__.py b/src/leap/keymanager/tests/__init__.py index e69de29..1ea33b5 100644 --- a/src/leap/keymanager/tests/__init__.py +++ b/src/leap/keymanager/tests/__init__.py @@ -0,0 +1,236 @@ +# -*- coding: utf-8 -*- +# test_keymanager.py +# Copyright (C) 2013 LEAP +# +# 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 3 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. +# +# You should have received a copy of the GNU General Public License +# along with this program. If not, see . +""" +Base classes for the Key Manager tests. +""" + +from mock import Mock + +from leap.common.testing.basetest import BaseLeapTest +from leap.soledad.client import Soledad +from leap.keymanager import KeyManager + + +ADDRESS = 'leap@leap.se' +# XXX discover the gpg binary path +GPG_BINARY_PATH = '/usr/bin/gpg' + + +class KeyManagerWithSoledadTestCase(BaseLeapTest): + + def setUp(self): + # mock key fetching and storing so Soledad doesn't fail when trying to + # reach the server. + Soledad._get_secrets_from_shared_db = Mock(return_value=None) + Soledad._put_secrets_in_shared_db = Mock(return_value=None) + + class MockSharedDB(object): + + get_doc = Mock(return_value=None) + put_doc = Mock() + lock = Mock(return_value=('atoken', 300)) + unlock = Mock(return_value=True) + + def __call__(self): + return self + + Soledad._shared_db = MockSharedDB() + + self._soledad = Soledad( + u"leap@leap.se", + u"123456", + secrets_path=self.tempdir + "/secret.gpg", + local_db_path=self.tempdir + "/soledad.u1db", + server_url='', + cert_file=None, + auth_token=None, + ) + + def tearDown(self): + km = self._key_manager() + for key in km.get_all_keys(): + km._wrapper_map[key.__class__].delete_key(key) + for key in km.get_all_keys(private=True): + km._wrapper_map[key.__class__].delete_key(key) + + def _key_manager(self, user=ADDRESS, url='', token=None): + return KeyManager(user, url, self._soledad, token=token, + gpgbinary=GPG_BINARY_PATH) + + +# key 24D18DDF: public key "Leap Test Key " +KEY_FINGERPRINT = "E36E738D69173C13D709E44F2F455E2824D18DDF" +PUBLIC_KEY = """ +-----BEGIN PGP PUBLIC KEY BLOCK----- +Version: GnuPG v1.4.10 (GNU/Linux) + +mQINBFC9+dkBEADNRfwV23TWEoGc/x0wWH1P7PlXt8MnC2Z1kKaKKmfnglVrpOiz +iLWoiU58sfZ0L5vHkzXHXCBf6Eiy/EtUIvdiWAn+yASJ1mk5jZTBKO/WMAHD8wTO +zpMsFmWyg3xc4DkmFa9KQ5EVU0o/nqPeyQxNMQN7px5pPwrJtJFmPxnxm+aDkPYx +irDmz/4DeDNqXliazGJKw7efqBdlwTHkl9Akw2gwy178pmsKwHHEMOBOFFvX61AT +huKqHYmlCGSliwbrJppTG7jc1/ls3itrK+CWTg4txREkSpEVmfcASvw/ZqLbjgfs +d/INMwXnR9U81O8+7LT6yw/ca4ppcFoJD7/XJbkRiML6+bJ4Dakiy6i727BzV17g +wI1zqNvm5rAhtALKfACha6YO43aJzairO4II1wxVHvRDHZn2IuKDDephQ3Ii7/vb +hUOf6XCSmchkAcpKXUOvbxm1yfB1LRa64mMc2RcZxf4mW7KQkulBsdV5QG2276lv +U2UUy2IutXcGP5nXC+f6sJJGJeEToKJ57yiO/VWJFjKN8SvP+7AYsQSqINUuEf6H +T5gCPCraGMkTUTPXrREvu7NOohU78q6zZNaL3GW8ai7eSeANSuQ8Vzffx7Wd8Y7i +Pw9sYj0SMFs1UgjbuL6pO5ueHh+qyumbtAq2K0Bci0kqOcU4E9fNtdiovQARAQAB +tBxMZWFwIFRlc3QgS2V5IDxsZWFwQGxlYXAuc2U+iQI3BBMBCAAhBQJQvfnZAhsD +BQsJCAcDBRUKCQgLBRYCAwEAAh4BAheAAAoJEC9FXigk0Y3fT7EQAKH3IuRniOpb +T/DDIgwwjz3oxB/W0DDMyPXowlhSOuM0rgGfntBpBb3boezEXwL86NPQxNGGruF5 +hkmecSiuPSvOmQlqlS95NGQp6hNG0YaKColh+Q5NTspFXCAkFch9oqUje0LdxfSP +QfV9UpeEvGyPmk1I9EJV/YDmZ4+Djge1d7qhVZInz4Rx1NrSyF/Tc2EC0VpjQFsU +Y9Kb2YBBR7ivG6DBc8ty0jJXi7B4WjkFcUEJviQpMF2dCLdonCehYs1PqsN1N7j+ +eFjQd+hqVMJgYuSGKjvuAEfClM6MQw7+FmFwMyLgK/Ew/DttHEDCri77SPSkOGSI +txCzhTg6798f6mJr7WcXmHX1w1Vcib5FfZ8vTDFVhz/XgAgArdhPo9V6/1dgSSiB 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+OwnATy0LmSMAWOw5rKbsh5nfwCiUTM20xp0t5JeXd+wPVWbpWqI2EnkCEN+RJr9i +7dp/ymDQ+Yt5wrsN3NwoyiexPOG91WQVCADdErHsnglVZZq9Z8Wx7KwecGCUurJ2 +H6lKudv5YOxPnAzqZS5HbpZd/nRTMZh2rdXCr5m2YOuewyYjvM757AkmUpM09zJX +MQ1S67/UX2y8/74TcRF97Ncx9HeELs92innBRXoFitnNguvcO6Esx4BTe1OdU6qR +ER3zAmVf22Le9ciXbu24DN4mleOH+OmBx7X2PqJSYW9GAMTsRB081R6EWKH7romQ +waxFrZ4DJzZ9ltyosEJn5F32StyLrFxpcrdLUoEaclZCv2qka7sZvi0EvovDVEBU +e10jOx9AOwf8Gj2ufhquQ6qgVYCzbP+YrodtkFrXRS3IsljIchj1M2ffB/0bfoUs +rtER9pLvYzCjBPg8IfGLw0o754Qbhh/ReplCRTusP/fQMybvCvfxreS3oyEriu/G +GufRomjewZ8EMHDIgUsLcYo2UHZsfF7tcazgxMGmMvazp4r8vpgrvW/8fIN/6Adu +tF+WjWDTvJLFJCe6O+BFJOWrssNrrra1zGtLC1s8s+Wfpe+bGPL5zpHeebGTwH1U +22eqgJArlEKxrfarz7W5+uHZJHSjF/K9ZvunLGD0n9GOPMpji3UO3zeM8IYoWn7E +/EWK1XbjnssNemeeTZ+sDh+qrD7BOi+vCX1IyBxbfqnQfJZvmcPWpruy1UsO+aIC +0GY8Jr3OL69dDQ21jueJAh8EGAEIAAkFAlC9+dkCGwwACgkQL0VeKCTRjd9HCw/+ +LQSVgLLF4ulYlPCjWIIuQwrPbJfWUVVr2dPUFVM85DCv8gBzk5c121snXh9Swovm +laBbw6ate3BmbXLh64jVE9Za5sbTWi7PCcbO/bpRy4d6oLmitmNw6cq0vjTLxUYy +bwuiJxWREkfxuU85EKdouN062YDevH+/YResmlJrcCE7LRlJFeRlKsrrwBU3BqYd +GgFJjKjQC1peeQ9fj62Y7xfwE9+PXbkiWO5u/Bk8hb1VZH1SoIRU98NHVcp6BVvp +VK0jLAXuSauSczULmpRjbyt1lhaAqivDTWEEZXiNNbRyp17c3nVdPWOcgBr42hdQ +z25CgZgyLCsvu82wuXLKJblrIPJX3Yf+si6KqEWBsmwdOWybsjygaF5HvzgFqAAD +U0goPWoQ71PorP2XOUNp5ZLkBQp5etvtkksjVNMIhnHn8PGMuoxO39EUGlWj2B5l +Cu8tSosAzB1pS8NcLZzoNoI9dOHrmgJmP+GrOUkcf5GhNZbMoj4GNfGBRYX0SZlQ +GuDrwNKYj73C4MWyNnnUFyq8nDHJ/G1NpaF2hiof9RBL4PUU/f92JkceXPBXA8gL +Mz2ig1OButwPPLFGQhWqxXAGrsS3Ny+BhTJfnfIbbkaLLphBpDZm1D9XKbAUvdd1 +RZXoH+FTg9UAW87eqU610npOkT6cRaBxaMK/mDtGNdc= +=JTFu +-----END PGP PRIVATE KEY BLOCK----- +""" diff --git a/src/leap/keymanager/tests/test_keymanager.py b/src/leap/keymanager/tests/test_keymanager.py index 65f8f39..1bd6a2e 100644 --- a/src/leap/keymanager/tests/test_keymanager.py +++ b/src/leap/keymanager/tests/test_keymanager.py @@ -1,4 +1,4 @@ -## -*- coding: utf-8 -*- +# -*- coding: utf-8 -*- # test_keymanager.py # Copyright (C) 2013 LEAP # @@ -23,12 +23,10 @@ Tests for the Key Manager. from mock import Mock from leap.common.testing.basetest import BaseLeapTest -from leap.soledad.client import Soledad from leap.keymanager import ( - KeyManager, openpgp, KeyNotFound, - KeyAttributesDiffer, + KeyAddressMismatch, errors, ) from leap.keymanager.openpgp import OpenPGPKey @@ -36,11 +34,21 @@ from leap.keymanager.keys import ( is_address, build_key_from_dict, ) +from leap.keymanager.validation import ( + ValidationLevel, + toValidationLevel +) +from leap.keymanager.tests import ( + KeyManagerWithSoledadTestCase, + ADDRESS, + KEY_FINGERPRINT, + PUBLIC_KEY, + PRIVATE_KEY, + GPG_BINARY_PATH +) -ADDRESS = 'leap@leap.se' ADDRESS_2 = 'anotheruser@leap.se' -GPG_BINARY_PATH = '/usr/bin/gpg' class KeyManagerUtilTestCase(BaseLeapTest): @@ -76,7 +84,7 @@ class KeyManagerUtilTestCase(BaseLeapTest): 'expiry_date': 'expiry_date', 'first_seen_at': 'first_seen_at', 'last_audited_at': 'last_audited_at', - 'validation': 'validation', + 'validation': str(ValidationLevel.Weak_Chain), } key = build_key_from_dict(OpenPGPKey, ADDRESS, kdict) self.assertEqual( @@ -107,52 +115,10 @@ class KeyManagerUtilTestCase(BaseLeapTest): kdict['last_audited_at'], key.last_audited_at, 'Wrong data in key.') self.assertEqual( - kdict['validation'], key.validation, + toValidationLevel(kdict['validation']), key.validation, 'Wrong data in key.') -class KeyManagerWithSoledadTestCase(BaseLeapTest): - - def setUp(self): - # mock key fetching and storing so Soledad doesn't fail when trying to - # reach the server. - Soledad._get_secrets_from_shared_db = Mock(return_value=None) - Soledad._put_secrets_in_shared_db = Mock(return_value=None) - - class MockSharedDB(object): - - get_doc = Mock(return_value=None) - put_doc = Mock() - lock = Mock(return_value=('atoken', 300)) - unlock = Mock(return_value=True) - - def __call__(self): - return self - - Soledad._shared_db = MockSharedDB() - - self._soledad = Soledad( - u"leap@leap.se", - u"123456", - secrets_path=self.tempdir + "/secret.gpg", - local_db_path=self.tempdir + "/soledad.u1db", - server_url='', - cert_file=None, - auth_token=None, - ) - - def tearDown(self): - km = self._key_manager() - for key in km.get_all_keys(): - km._wrapper_map[key.__class__].delete_key(key) - for key in km.get_all_keys(private=True): - km._wrapper_map[key.__class__].delete_key(key) - - def _key_manager(self, user=ADDRESS, url='', token=None): - return KeyManager(user, url, self._soledad, token=token, - gpgbinary=GPG_BINARY_PATH) - - class OpenPGPCryptoTestCase(KeyManagerWithSoledadTestCase): def _test_openpgp_gen_key(self): @@ -220,7 +186,6 @@ class OpenPGPCryptoTestCase(KeyManagerWithSoledadTestCase): KeyNotFound, pgp.get_key, ADDRESS, private=True) pgp.put_ascii_key(PRIVATE_KEY) privkey = pgp.get_key(ADDRESS, private=True) - plaintext = pgp.decrypt(cyphertext, privkey) pgp.delete_key(pubkey) pgp.delete_key(privkey) self.assertRaises( @@ -473,7 +438,7 @@ class KeyManagerKeyManagementTestCase(KeyManagerWithSoledadTestCase): """ km = self._key_manager(url='http://nickserver.domain') - km.put_key(PUBLIC_KEY) + km.put_raw_key(PUBLIC_KEY, OpenPGPKey) key = km.get_key(ADDRESS, OpenPGPKey) self.assertIsInstance(key, OpenPGPKey) self.assertEqual(ADDRESS, key.address) @@ -524,7 +489,7 @@ class KeyManagerKeyManagementTestCase(KeyManagerWithSoledadTestCase): km._fetcher.get = Mock(return_value=Response()) km.ca_cert_path = 'cacertpath' - self.assertRaises(KeyAttributesDiffer, km.fetch_key, + self.assertRaises(KeyAddressMismatch, km.fetch_key, ADDRESS_2, "http://site.domain/key", OpenPGPKey) @@ -568,169 +533,6 @@ class KeyManagerCryptoTestCase(KeyManagerWithSoledadTestCase): # Key material for testing -# key 24D18DDF: public key "Leap Test Key " -KEY_FINGERPRINT = "E36E738D69173C13D709E44F2F455E2824D18DDF" -PUBLIC_KEY = """ ------BEGIN PGP PUBLIC KEY BLOCK----- -Version: GnuPG v1.4.10 (GNU/Linux) - 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-ZtQ/VymwFL3XdUWV6B/hU4PVAFvO3qlOtdJ6TpE+nEWgcWjCv5g7RjXX -=MuOY ------END PGP PUBLIC KEY BLOCK----- -""" -PRIVATE_KEY = """ ------BEGIN PGP PRIVATE KEY BLOCK----- -Version: GnuPG v1.4.10 (GNU/Linux) - -lQcYBFC9+dkBEADNRfwV23TWEoGc/x0wWH1P7PlXt8MnC2Z1kKaKKmfnglVrpOiz -iLWoiU58sfZ0L5vHkzXHXCBf6Eiy/EtUIvdiWAn+yASJ1mk5jZTBKO/WMAHD8wTO -zpMsFmWyg3xc4DkmFa9KQ5EVU0o/nqPeyQxNMQN7px5pPwrJtJFmPxnxm+aDkPYx -irDmz/4DeDNqXliazGJKw7efqBdlwTHkl9Akw2gwy178pmsKwHHEMOBOFFvX61AT -huKqHYmlCGSliwbrJppTG7jc1/ls3itrK+CWTg4txREkSpEVmfcASvw/ZqLbjgfs -d/INMwXnR9U81O8+7LT6yw/ca4ppcFoJD7/XJbkRiML6+bJ4Dakiy6i727BzV17g -wI1zqNvm5rAhtALKfACha6YO43aJzairO4II1wxVHvRDHZn2IuKDDephQ3Ii7/vb -hUOf6XCSmchkAcpKXUOvbxm1yfB1LRa64mMc2RcZxf4mW7KQkulBsdV5QG2276lv -U2UUy2IutXcGP5nXC+f6sJJGJeEToKJ57yiO/VWJFjKN8SvP+7AYsQSqINUuEf6H -T5gCPCraGMkTUTPXrREvu7NOohU78q6zZNaL3GW8ai7eSeANSuQ8Vzffx7Wd8Y7i -Pw9sYj0SMFs1UgjbuL6pO5ueHh+qyumbtAq2K0Bci0kqOcU4E9fNtdiovQARAQAB -AA/+JHtlL39G1wsH9R6UEfUQJGXR9MiIiwZoKcnRB2o8+DS+OLjg0JOh8XehtuCs 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-jPwLT5o9CADQmcbKZ+QQ1ZM9v99iDZol7SAMZX43JC019sx6GK0u6xouJBcLfeB4 -OXacTgmSYdTa9RM9fbfVpti01tJ84LV2SyL/VJq/enJF4XQPSynT/tFTn1PAor6o -tEAAd8fjKdJ6LnD5wb92SPHfQfXqI84rFEO8rUNIE/1ErT6DYifDzVCbfD2KZdoF -cOSp7TpD77sY1bs74ocBX5ejKtd+aH99D78bJSMM4pSDZsIEwnomkBHTziubPwJb -OwnATy0LmSMAWOw5rKbsh5nfwCiUTM20xp0t5JeXd+wPVWbpWqI2EnkCEN+RJr9i -7dp/ymDQ+Yt5wrsN3NwoyiexPOG91WQVCADdErHsnglVZZq9Z8Wx7KwecGCUurJ2 -H6lKudv5YOxPnAzqZS5HbpZd/nRTMZh2rdXCr5m2YOuewyYjvM757AkmUpM09zJX -MQ1S67/UX2y8/74TcRF97Ncx9HeELs92innBRXoFitnNguvcO6Esx4BTe1OdU6qR -ER3zAmVf22Le9ciXbu24DN4mleOH+OmBx7X2PqJSYW9GAMTsRB081R6EWKH7romQ -waxFrZ4DJzZ9ltyosEJn5F32StyLrFxpcrdLUoEaclZCv2qka7sZvi0EvovDVEBU -e10jOx9AOwf8Gj2ufhquQ6qgVYCzbP+YrodtkFrXRS3IsljIchj1M2ffB/0bfoUs -rtER9pLvYzCjBPg8IfGLw0o754Qbhh/ReplCRTusP/fQMybvCvfxreS3oyEriu/G -GufRomjewZ8EMHDIgUsLcYo2UHZsfF7tcazgxMGmMvazp4r8vpgrvW/8fIN/6Adu -tF+WjWDTvJLFJCe6O+BFJOWrssNrrra1zGtLC1s8s+Wfpe+bGPL5zpHeebGTwH1U -22eqgJArlEKxrfarz7W5+uHZJHSjF/K9ZvunLGD0n9GOPMpji3UO3zeM8IYoWn7E -/EWK1XbjnssNemeeTZ+sDh+qrD7BOi+vCX1IyBxbfqnQfJZvmcPWpruy1UsO+aIC -0GY8Jr3OL69dDQ21jueJAh8EGAEIAAkFAlC9+dkCGwwACgkQL0VeKCTRjd9HCw/+ -LQSVgLLF4ulYlPCjWIIuQwrPbJfWUVVr2dPUFVM85DCv8gBzk5c121snXh9Swovm -laBbw6ate3BmbXLh64jVE9Za5sbTWi7PCcbO/bpRy4d6oLmitmNw6cq0vjTLxUYy -bwuiJxWREkfxuU85EKdouN062YDevH+/YResmlJrcCE7LRlJFeRlKsrrwBU3BqYd -GgFJjKjQC1peeQ9fj62Y7xfwE9+PXbkiWO5u/Bk8hb1VZH1SoIRU98NHVcp6BVvp -VK0jLAXuSauSczULmpRjbyt1lhaAqivDTWEEZXiNNbRyp17c3nVdPWOcgBr42hdQ -z25CgZgyLCsvu82wuXLKJblrIPJX3Yf+si6KqEWBsmwdOWybsjygaF5HvzgFqAAD -U0goPWoQ71PorP2XOUNp5ZLkBQp5etvtkksjVNMIhnHn8PGMuoxO39EUGlWj2B5l -Cu8tSosAzB1pS8NcLZzoNoI9dOHrmgJmP+GrOUkcf5GhNZbMoj4GNfGBRYX0SZlQ -GuDrwNKYj73C4MWyNnnUFyq8nDHJ/G1NpaF2hiof9RBL4PUU/f92JkceXPBXA8gL -Mz2ig1OButwPPLFGQhWqxXAGrsS3Ny+BhTJfnfIbbkaLLphBpDZm1D9XKbAUvdd1 -RZXoH+FTg9UAW87eqU610npOkT6cRaBxaMK/mDtGNdc= -=JTFu ------END PGP PRIVATE KEY BLOCK----- -""" - # key 7FEE575A: public key "anotheruser " PUBLIC_KEY_2 = """ -----BEGIN PGP PUBLIC KEY BLOCK----- diff --git a/src/leap/keymanager/tests/test_validation.py b/src/leap/keymanager/tests/test_validation.py new file mode 100644 index 0000000..c7170ab --- /dev/null +++ b/src/leap/keymanager/tests/test_validation.py @@ -0,0 +1,150 @@ +# -*- coding: utf-8 -*- +# __init__.py +# Copyright (C) 2014 LEAP +# +# 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 3 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. +# +# You should have received a copy of the GNU General Public License +# along with this program. If not, see . +""" +Tests for the Validation Levels +""" + +from leap.keymanager.openpgp import OpenPGPKey +from leap.keymanager.errors import ( + KeyNotValidUpgrade +) +from leap.keymanager.tests import ( + KeyManagerWithSoledadTestCase, + ADDRESS, + PUBLIC_KEY, + KEY_FINGERPRINT +) +from leap.keymanager.validation import ValidationLevel + + +class ValidationLevelTestCase(KeyManagerWithSoledadTestCase): + + def test_none_old_key(self): + km = self._key_manager() + km.put_raw_key(PUBLIC_KEY, OpenPGPKey) + key = km.get_key(ADDRESS, OpenPGPKey, fetch_remote=False) + self.assertEqual(key.fingerprint, KEY_FINGERPRINT) + + def test_cant_upgrade(self): + km = self._key_manager() + km.put_raw_key(PUBLIC_KEY, OpenPGPKey, + validation=ValidationLevel.Provider_Trust) + self.assertRaises(KeyNotValidUpgrade, km.put_raw_key, UNRELATED_KEY, + OpenPGPKey) + + def test_fingerprint_level(self): + km = self._key_manager() + km.put_raw_key(PUBLIC_KEY, OpenPGPKey) + km.put_raw_key(UNRELATED_KEY, OpenPGPKey, + validation=ValidationLevel.Fingerprint) + key = km.get_key(ADDRESS, OpenPGPKey, fetch_remote=False) + self.assertEqual(key.fingerprint, UNRELATED_FINGERPRINT) + + def test_expired_key(self): + km = self._key_manager() + km.put_raw_key(EXPIRED_KEY, OpenPGPKey) + km.put_raw_key(UNRELATED_KEY, OpenPGPKey) + key = km.get_key(ADDRESS, OpenPGPKey, fetch_remote=False) + self.assertEqual(key.fingerprint, UNRELATED_FINGERPRINT) + + def test_expired_fail_lower_level(self): + km = self._key_manager() + km.put_raw_key(EXPIRED_KEY, OpenPGPKey, + validation=ValidationLevel.Third_Party_Endorsement) + self.assertRaises( + KeyNotValidUpgrade, + km.put_raw_key, + UNRELATED_KEY, + OpenPGPKey, + validation=ValidationLevel.Provider_Trust) + + +# Key material for testing + +# key 901FBCA5: public key "Leap Test Key " +UNRELATED_FINGERPRINT = "ABCCD9C8270B6A8D5633FAC9D04DB2E4901FBCA5" +UNRELATED_KEY = """ +-----BEGIN PGP PUBLIC KEY BLOCK----- +Version: GnuPG v1 + +mQENBFQ9VDoBCACbKflcEhUXZULOT4Fwc2ifRUllJpusd2uX5oeDlZdZ15uLY2eF +LcxnAdIWkI/PsXimh0ev/Pf4oCynfmt02I3c2d9F0N6JXWnRiP+p098oPOcqeEqL +N3CrkH1RVnEXNeJ/Fu7tkD61SBXl1MytMfcHyhN5arg8OcVAjcmghX53+92jFhC9 +8ss87H/qEe5vEX/ahP3tiL5ULvaS4GIX+XB0O3yCVdRoRG9lqMIBP/ZqCkKrNll8 +dT12a6ByG/rWharZUeUETiM4Y+JjDUUaEC2YhNF9k52JNGanLH9LTTtlKy5WTT+E +C6T6VMAtkwcBDpkXr5sBB/N+Y1z0Fp359lIXABEBAAG0HExlYXAgVGVzdCBLZXkg +PGxlYXBAbGVhcC5zZT6JATgEEwECACIFAlQ9VDoCGwMGCwkIBwMCBhUIAgkKCwQW +AgMBAh4BAheAAAoJENBNsuSQH7ylsSUIAIxUFbkeTdHbCF/LVA2U+ktnR1iVikAY +vFK+U+Bto11/AO4Kew2eWniDch/sqLQOoSydtP42z2z3/Al3u7LhQ8bElQHPDY78 +t49qweyJi00V3vCKCdWwPJnPM5eJOIrZHCbwIgeXCsXxVNJVyziVqMuum+px1h2d +1YJZXYejT8rzwa3yBPAsGWRAWETeTvUuyjPMFa59scbnaDuY+bwQ2r/qG9m7UyHU +h2kAHC5sf1rixVOY6rLhw75gQHE/L2BZJRfVsDQqIpEMh2OgMfNbL928jncjwQvc +/IXXwSUx7y50ll+uNh+TVLf0MlUjKdHmHqnGBMlIIWojWJuKxYmOOoO5AQ0EVD1U +OgEIAM/TlhWVSI+tl5XBUAcf60RxjpHQkmdfq1i1jgwUgu/638EKzBfLcnRYX8Rn +DO9CWnHcql/4hp226fIWZN/SyReE81n7UkLDMAglhHgiezHMSH1GYVu4IlfpLVXn +brLVo83KioH5MPFWmZv5tigpU/G8dTx9yVGv1//YW2qqRYYqeIKJfapBaY/bNqyD +vYRfZo1K2brtHx4bToY6mALRF4ruV5SVZGS69e4Sh692C2pXSVbCpRhQ/2WnvkZH +leFIdmNmQN61MC1k26A620Rm+pAsXX71dln0u96xbrCgEVbi6ccfXzbFKtVmThVB +w11CLvVTviOm99TmcgpmDS4cf08AEQEAAYkBHwQYAQIACQUCVD1UOgIbDAAKCRDQ +TbLkkB+8pR+fB/0SeTcRr1duN7VYWdtng1+jO0ornIBtUraglN01dEEmiwN83DTi +J37i+nll+4is7BtiXqhumRptKh1v8UUMyFX/rjjoojCJBg5NExsiOYl3O4le68oF +3+XC+n7yrlyNmI15+3dcQmC9F6HN8EBZgrn5YPKGIOMHTGatB5PryMKg2IKiN5GZ +E0hmrOQgmcGrkeqysKACQYUHTasSk2IY1l1G5YQglqCaBh4+UC82Dmg5fTBbHjxP +YhhojkP4aD/0YW7dgql3nzYqvPCAjBH1Cf6rA9HvAJwUP9Ig/okcrrPEKm638+mG ++vNIuLqIkA4oFLBAAIrgMiQZ+NZz9uD6DJE7 +=FO7G +-----END PGP PUBLIC KEY BLOCK----- +""" + +# key A1885A7C: public key "Leap Test Key " +EXPIRED_FINGERPRINT = "7C1F68B0E14157B09B5F4ADE6F15F004A1885A7C" +EXPIRED_KEY = """ +-----BEGIN PGP PUBLIC KEY BLOCK----- +Version: GnuPG v1.4.12 (GNU/Linux) + +mQENBBvrfd0BCADGNpspaNhsbhSjKioCWrE2MTTYC+Sdpes22RabdhQyOCWvlSbj +b8p0y3kmnMOtVBT+c22/w7eu2YBfIpS4RswgE5ypr/1kZLFQueVe/cp29GjPvLwJ +82A3EOHcmXs8rSJ76h2bnkySvbJawz9rwCcaXhpdAwC+sjWvbqiwZYEL+90I4Xp3 +acDh9vNtPxDCg5RdI0bfdIEBGgHTfsda3kWGvo1wH5SgrTRq0+EcTI7aJgkMmM/A +IhnpACE52NvGdG9eB3x7xyQFsQqK8F0XvEev2UJH4SR7vb+Z7FNTJKCy6likYbSV +wGGFuowFSESnzXuUI6PcjyuO6FUbMgeM5euFABEBAAG0HExlYXAgVGVzdCBLZXkg +PGxlYXBAbGVhcC5zZT6JAT4EEwECACgFAhvrfd0CGwMFCQABUYAGCwkIBwMCBhUI +AgkKCwQWAgMBAh4BAheAAAoJEG8V8AShiFp8VNkH/iCQcXkTfMOVlL2rQRyZtJEO +Lr5uTyyY8O6ubeNCHqZzlIopiPAsv4hIYjjMDvOfZ9R53YgmbacUm0rvh1B4MSUf +k+sa9/tequ3y44LUKp7AB6NyyLgVOU5ngl2w+bi7CgXAep3oP4joYKcU0mmSAc2S +2Gj85DVqP0kdzNs47esvyj7g1TOfdBwmLsTx/219H+w3dNBeyCQWkYCYNh7MX/Ba +SZ+P0xr4FetcOVPM3wAzUtDG7hKsgccoIXt0FWhG/nn8cETfGH+o3W/ky7Jktatx +DGDHoZJvAaG2B2ey1pAQlezr8p/O+ZVABiigHk1S+myBHyhlXzUcjhQnEG7aHZ65 +AQ0EG+t93QEIAKqRq/2sBDW4g3FU+11LhixT+GosrfVvnitz3S9k2tBXok/wYpI1 +XeA+kTHiF0LaqoaciDRvkA9DvhDbSrNM1yeuYRyZiHlTmoPZ/Fkl60oA2cyLd1L5 +sXbuipY3TEiakugdSU4rzgi0hFycm6Go6yq2G6eC6UALvD9CTMdZHw40TadG9xpm +4thYPuJ1kPH8/bkbTi9sLHoApYgL+7ssje8w4epr0qD4IGxeKwJPf/tbTRpnd8w3 +leldixHHKAutNt49p0pkXlORAHRpUmp+KMZhFvCvIPwe9o5mYtMR7sDRxjY61ZEQ +KLyKoh5wsJsaPXBjdG7cf6G/cBcwvnQVUHcAEQEAAYkBJQQYAQIADwUCG+t93QIb +DAUJAAFRgAAKCRBvFfAEoYhafOPgB/9z4YCyT/N0262HtegHykhsyykuqEeNb1LV +D9INcP+RbCX/0IjFgP4DTMPP7qqF1OBwR276maALT321Gqxc5HN5YrwxGdmoyBLm +unaQJJlD+7B1C+jnO6r4m44obvJ/NMERxVyzkXap3J2VgRIO1wNLI9I0sH6Kj5/j +Mgy06OwXDcqIc+jB4sIJ3Tnm8LZ3phJzNEm9mI8Ak0oJ7IEcMndR6DzmRt1rJQcq +K/D7hOG02zvyRhxF27U1qR1MxeU/gNnOx8q4dnVyWB+EiV1sFl4iTOyYHEsoyd7W +Osuse7+NkyUHgMXMVW7cz+nU7iO+ht2rkBtv+Z5LGlzgHTeFjKci +=WhX+ +-----END PGP PUBLIC KEY BLOCK----- +""" + +import unittest +if __name__ == "__main__": + unittest.main() diff --git a/src/leap/keymanager/validation.py b/src/leap/keymanager/validation.py new file mode 100644 index 0000000..6dceb78 --- /dev/null +++ b/src/leap/keymanager/validation.py @@ -0,0 +1,94 @@ +# -*- coding: utf-8 -*- +# __init__.py +# Copyright (C) 2014 LEAP +# +# 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 3 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. +# +# You should have received a copy of the GNU General Public License +# along with this program. If not, see . + +""" +Validation levels implementation for key managment. + +See: + https://lists.riseup.net/www/arc/leap-discuss/2014-09/msg00000.html +""" + + +from datetime import datetime +from enum import Enum + + +ValidationLevel = Enum( + "Weak_Chain", + "Provider_Trust", + "Provider_Endorsement", + "Third_Party_Endorsement", + "Third_Party_Consensus", + "Historically_Auditing", + "Known_Key", + "Fingerprint") + + +def toValidationLevel(value): + """ + Convert a string representation of a validation level into + C{ValidationLevel} + + :param value: validation level + :type value: str + :rtype: ValidationLevel + :raises ValueError: if C{value} is not a validation level + """ + for level in ValidationLevel: + if value == str(level): + return level + raise ValueError("Not valid validation level: %s" % (value,)) + + +def can_upgrade(new_key, old_key): + """ + :type new_key: EncryptionKey + :type old_key: EncryptionKey + :rtype: bool + """ + # XXX not succesfully used and strict high validation level (#6211) + # XXX implement key signature checking (#6120) + + # First contact + if old_key is None: + return True + + if new_key.address != old_key.address: + # XXX how do we map multiple IDs? (#6212) + return False + + # An update of the same key + if new_key.fingerprint == old_key.fingerprint: + # XXX wich one is newer? is that a downgrade attack? (#6210) + return True + + # Manually verified fingerprint + if new_key.validation == ValidationLevel.Fingerprint: + return True + + # Expired key and higher validation level + if old_key.expiry_date: + old_expiry_date = datetime.fromtimestamp(int(old_key.expiry_date)) + if (old_expiry_date < datetime.now() and + new_key.validation >= old_key.validation): + return True + + # No expiration date and higher validation level + elif new_key.validation >= old_key.validation: + return True + + return False -- cgit v1.2.3