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-rw-r--r--src/leap/soledad/tests/test_crypto.py245
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diff --git a/src/leap/soledad/tests/test_crypto.py b/src/leap/soledad/tests/test_crypto.py
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--- a/src/leap/soledad/tests/test_crypto.py
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-# -*- coding: utf-8 -*-
-# test_crypto.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 <http://www.gnu.org/licenses/>.
-
-
-"""
-Tests for cryptographic related stuff.
-"""
-
-import os
-import shutil
-import tempfile
-import simplejson as json
-import hashlib
-import binascii
-
-
-from leap.common.testing.basetest import BaseLeapTest
-from Crypto import Random
-
-
-from leap.common.testing.basetest import BaseLeapTest
-from leap.soledad import Soledad
-from leap.soledad import crypto
-from leap.soledad.backends import leap_backend
-from leap.soledad.backends.couch import CouchDatabase
-from leap.soledad.tests import (
- BaseSoledadTest,
- KEY_FINGERPRINT,
- PRIVATE_KEY,
-)
-from leap.soledad.tests.u1db_tests import (
- simple_doc,
- nested_doc,
- TestCaseWithServer,
-)
-
-
-# These will be used in the future for EncryptedCouchSyncTestCase
-#from leap.soledad.tests.test_couch import CouchDBTestCase
-#from leap.soledad.tests.test_leap_backend import make_leap_document_for_test
-#from leap.soledad.backends.couch import CouchServerState
-
-
-class EncryptedSyncTestCase(BaseSoledadTest):
- """
- Tests that guarantee that data will always be encrypted when syncing.
- """
-
- def test_encrypt_decrypt_json(self):
- """
- Test encrypting and decrypting documents.
- """
- simpledoc = {'key': 'val'}
- doc1 = leap_backend.LeapDocument(doc_id='id')
- doc1.content = simpledoc
- # encrypt doc
- doc1.set_json(leap_backend.encrypt_doc(self._soledad._crypto, doc1))
- # assert content is different and includes keys
- self.assertNotEqual(
- simpledoc, doc1.content,
- 'incorrect document encryption')
- self.assertTrue(leap_backend.ENC_JSON_KEY in doc1.content)
- self.assertTrue(leap_backend.ENC_SCHEME_KEY in doc1.content)
- # decrypt doc
- doc1.set_json(leap_backend.decrypt_doc(self._soledad._crypto, doc1))
- self.assertEqual(
- simpledoc, doc1.content, 'incorrect document encryption')
-
-
-class RecoveryDocumentTestCase(BaseSoledadTest):
-
- def test_export_recovery_document_raw(self):
- rd = self._soledad.export_recovery_document()
- secret_id = rd[self._soledad.STORAGE_SECRETS_KEY].items()[0][0]
- secret = rd[self._soledad.STORAGE_SECRETS_KEY][secret_id]
- self.assertEqual(secret_id, self._soledad._secret_id)
- self.assertEqual(secret, self._soledad._secrets[secret_id])
- self.assertTrue(self._soledad.CIPHER_KEY in secret)
- self.assertTrue(secret[self._soledad.CIPHER_KEY] == 'aes256')
- self.assertTrue(self._soledad.LENGTH_KEY in secret)
- self.assertTrue(self._soledad.SECRET_KEY in secret)
-
- def test_import_recovery_document(self):
- rd = self._soledad.export_recovery_document()
- s = self._soledad_instance(user='anotheruser@leap.se')
- s.import_recovery_document(rd)
- s._set_secret_id(self._soledad._secret_id)
- self.assertEqual(self._soledad._uuid,
- s._uuid, 'Failed setting user uuid.')
- self.assertEqual(self._soledad._get_storage_secret(),
- s._get_storage_secret(),
- 'Failed settinng secret for symmetric encryption.')
-
-
-class SoledadSecretsTestCase(BaseSoledadTest):
-
- def test__gen_secret(self):
- # instantiate and save secret_id
- sol = self._soledad_instance(user='user@leap.se')
- self.assertTrue(len(sol._secrets) == 1)
- secret_id_1 = sol.secret_id
- # assert id is hash of secret
- self.assertTrue(
- secret_id_1 == hashlib.sha256(sol.storage_secret).hexdigest())
- # generate new secret
- secret_id_2 = sol._gen_secret()
- self.assertTrue(secret_id_1 != secret_id_2)
- # re-instantiate
- sol = self._soledad_instance(
- user='user@leap.se',
- secret_id=secret_id_1)
- # assert ids are valid
- self.assertTrue(len(sol._secrets) == 2)
- self.assertTrue(secret_id_1 in sol._secrets)
- self.assertTrue(secret_id_2 in sol._secrets)
- # assert format of secret 1
- self.assertTrue(sol.storage_secret is not None)
- self.assertIsInstance(sol.storage_secret, str)
- self.assertTrue(len(sol.storage_secret) == sol.GENERATED_SECRET_LENGTH)
- # assert format of secret 2
- sol._set_secret_id(secret_id_2)
- self.assertTrue(sol.storage_secret is not None)
- self.assertIsInstance(sol.storage_secret, str)
- self.assertTrue(len(sol.storage_secret) == sol.GENERATED_SECRET_LENGTH)
- # assert id is hash of new secret
- self.assertTrue(
- secret_id_2 == hashlib.sha256(sol.storage_secret).hexdigest())
-
- def test__has_secret(self):
- sol = self._soledad_instance(user='user@leap.se')
- self.assertTrue(sol._has_secret(), "Should have a secret at "
- "this point")
- # setting secret id to None should not interfere in the fact we have a
- # secret.
- sol._set_secret_id(None)
- self.assertTrue(sol._has_secret(), "Should have a secret at "
- "this point")
- # but not being able to decrypt correctly should
- sol._secrets[sol.secret_id][sol.SECRET_KEY] = None
- self.assertFalse(sol._has_secret())
-
-
-class MacAuthTestCase(BaseSoledadTest):
-
- def test_decrypt_with_wrong_mac_raises(self):
- """
- Trying to decrypt a document with wrong MAC should raise.
- """
- simpledoc = {'key': 'val'}
- doc = leap_backend.LeapDocument(doc_id='id')
- doc.content = simpledoc
- # encrypt doc
- doc.set_json(leap_backend.encrypt_doc(self._soledad._crypto, doc))
- self.assertTrue(leap_backend.MAC_KEY in doc.content)
- self.assertTrue(leap_backend.MAC_METHOD_KEY in doc.content)
- # mess with MAC
- doc.content[leap_backend.MAC_KEY] = '1234567890ABCDEF'
- # try to decrypt doc
- self.assertRaises(
- leap_backend.WrongMac,
- leap_backend.decrypt_doc, self._soledad._crypto, doc)
-
- def test_decrypt_with_unknown_mac_method_raises(self):
- """
- Trying to decrypt a document with unknown MAC method should raise.
- """
- simpledoc = {'key': 'val'}
- doc = leap_backend.LeapDocument(doc_id='id')
- doc.content = simpledoc
- # encrypt doc
- doc.set_json(leap_backend.encrypt_doc(self._soledad._crypto, doc))
- self.assertTrue(leap_backend.MAC_KEY in doc.content)
- self.assertTrue(leap_backend.MAC_METHOD_KEY in doc.content)
- # mess with MAC method
- doc.content[leap_backend.MAC_METHOD_KEY] = 'mymac'
- # try to decrypt doc
- self.assertRaises(
- leap_backend.UnknownMacMethod,
- leap_backend.decrypt_doc, self._soledad._crypto, doc)
-
-
-class SoledadCryptoTestCase(BaseSoledadTest):
-
- def test_encrypt_decrypt_sym(self):
- # generate 256-bit key
- key = Random.new().read(32)
- iv, cyphertext = self._soledad._crypto.encrypt_sym(
- 'data', key,
- method=crypto.EncryptionMethods.AES_256_CTR)
- self.assertTrue(cyphertext is not None)
- self.assertTrue(cyphertext != '')
- self.assertTrue(cyphertext != 'data')
- plaintext = self._soledad._crypto.decrypt_sym(
- cyphertext, key, iv=iv,
- method=crypto.EncryptionMethods.AES_256_CTR)
- self.assertEqual('data', plaintext)
-
- def test_decrypt_with_wrong_iv_fails(self):
- key = Random.new().read(32)
- iv, cyphertext = self._soledad._crypto.encrypt_sym(
- 'data', key,
- method=crypto.EncryptionMethods.AES_256_CTR)
- self.assertTrue(cyphertext is not None)
- self.assertTrue(cyphertext != '')
- self.assertTrue(cyphertext != 'data')
- # get a different iv by changing the first byte
- rawiv = binascii.a2b_base64(iv)
- wrongiv = rawiv
- while wrongiv == rawiv:
- wrongiv = os.urandom(1) + rawiv[1:]
- plaintext = self._soledad._crypto.decrypt_sym(
- cyphertext, key, iv=binascii.b2a_base64(wrongiv),
- method=crypto.EncryptionMethods.AES_256_CTR)
- self.assertNotEqual('data', plaintext)
-
- def test_decrypt_with_wrong_key_fails(self):
- key = Random.new().read(32)
- iv, cyphertext = self._soledad._crypto.encrypt_sym(
- 'data', key,
- method=crypto.EncryptionMethods.AES_256_CTR)
- self.assertTrue(cyphertext is not None)
- self.assertTrue(cyphertext != '')
- self.assertTrue(cyphertext != 'data')
- wrongkey = Random.new().read(32) # 256-bits key
- # ensure keys are different in case we are extremely lucky
- while wrongkey == key:
- wrongkey = Random.new().read(32)
- plaintext = self._soledad._crypto.decrypt_sym(
- cyphertext, wrongkey, iv=iv,
- method=crypto.EncryptionMethods.AES_256_CTR)
- self.assertNotEqual('data', plaintext)
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-28 23:26:26 +0000