summaryrefslogtreecommitdiff
path: root/soledad/tests/test_sqlcipher.py
blob: 7b8f62982b71e8e0caf23b7019c11a7ce7653595 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
"""Test sqlcipher backend internals."""

import os
import time
from pysqlcipher import dbapi2
import unittest
from StringIO import StringIO
import threading

# u1db stuff.
from u1db import (
    errors,
    query_parser,
    sync,
)
from u1db.backends.sqlite_backend import SQLitePartialExpandDatabase

# soledad stuff.
from leap.soledad.backends.sqlcipher import (
    SQLCipherDatabase,
    DatabaseIsNotEncrypted,
)
from leap.soledad.backends.sqlcipher import open as u1db_open
from leap.soledad.backends.leap_backend import LeapDocument

# u1db tests stuff.
from leap.soledad.tests import u1db_tests as tests
from leap.soledad.tests.u1db_tests import test_sqlite_backend
from leap.soledad.tests.u1db_tests import test_backends
from leap.soledad.tests.u1db_tests import test_open
from leap.soledad.tests.u1db_tests import test_sync
from leap.soledad.backends.leap_backend import LeapSyncTarget
from leap.testing.basetest import BaseLeapTest

PASSWORD = '123456'


#-----------------------------------------------------------------------------
# The following tests come from `u1db.tests.test_common_backend`.
#-----------------------------------------------------------------------------

class TestSQLCipherBackendImpl(tests.TestCase):

    def test__allocate_doc_id(self):
        db = SQLCipherDatabase(':memory:', PASSWORD)
        doc_id1 = db._allocate_doc_id()
        self.assertTrue(doc_id1.startswith('D-'))
        self.assertEqual(34, len(doc_id1))
        int(doc_id1[len('D-'):], 16)
        self.assertNotEqual(doc_id1, db._allocate_doc_id())


#-----------------------------------------------------------------------------
# The following tests come from `u1db.tests.test_backends`.
#-----------------------------------------------------------------------------

def make_sqlcipher_database_for_test(test, replica_uid):
    db = SQLCipherDatabase(':memory:', PASSWORD)
    db._set_replica_uid(replica_uid)
    return db


def copy_sqlcipher_database_for_test(test, db):
    # DO NOT COPY OR REUSE THIS CODE OUTSIDE TESTS: COPYING U1DB DATABASES IS
    # THE WRONG THING TO DO, THE ONLY REASON WE DO SO HERE IS TO TEST THAT WE
    # CORRECTLY DETECT IT HAPPENING SO THAT WE CAN RAISE ERRORS RATHER THAN
    # CORRUPT USER DATA. USE SYNC INSTEAD, OR WE WILL SEND NINJA TO YOUR
    # HOUSE.
    new_db = SQLCipherDatabase(':memory:', PASSWORD)
    tmpfile = StringIO()
    for line in db._db_handle.iterdump():
        if not 'sqlite_sequence' in line:  # work around bug in iterdump
            tmpfile.write('%s\n' % line)
    tmpfile.seek(0)
    new_db._db_handle = dbapi2.connect(':memory:')
    new_db._db_handle.cursor().executescript(tmpfile.read())
    new_db._db_handle.commit()
    new_db._set_replica_uid(db._replica_uid)
    new_db._factory = db._factory
    return new_db


def make_document_for_test(test, doc_id, rev, content, has_conflicts=False):
    return LeapDocument(doc_id, rev, content, has_conflicts=has_conflicts)


SQLCIPHER_SCENARIOS = [
    ('sqlcipher', {'make_database_for_test': make_sqlcipher_database_for_test,
                   'copy_database_for_test': copy_sqlcipher_database_for_test,
                   'make_document_for_test': make_document_for_test, }),
]


class SQLCipherTests(test_backends.AllDatabaseTests):
    scenarios = SQLCIPHER_SCENARIOS


class SQLCipherDatabaseTests(test_backends.LocalDatabaseTests):
    scenarios = SQLCIPHER_SCENARIOS


class SQLCipherValidateGenNTransIdTests(
        test_backends.LocalDatabaseValidateGenNTransIdTests):
    scenarios = SQLCIPHER_SCENARIOS


class SQLCipherValidateSourceGenTests(
        test_backends.LocalDatabaseValidateSourceGenTests):
    scenarios = SQLCIPHER_SCENARIOS


class SQLCipherWithConflictsTests(
        test_backends.LocalDatabaseWithConflictsTests):
    scenarios = SQLCIPHER_SCENARIOS


class SQLCipherIndexTests(test_backends.DatabaseIndexTests):
    scenarios = SQLCIPHER_SCENARIOS


load_tests = tests.load_with_scenarios


#-----------------------------------------------------------------------------
# The following tests come from `u1db.tests.test_sqlite_backend`.
#-----------------------------------------------------------------------------

class TestSQLCipherDatabase(test_sqlite_backend.TestSQLiteDatabase):

    def test_atomic_initialize(self):
        tmpdir = self.createTempDir()
        dbname = os.path.join(tmpdir, 'atomic.db')

        t2 = None  # will be a thread

        class SQLCipherDatabaseTesting(SQLCipherDatabase):
            _index_storage_value = "testing"

            def __init__(self, dbname, ntry):
                self._try = ntry
                self._is_initialized_invocations = 0
                super(SQLCipherDatabaseTesting, self).__init__(dbname,
                                                               PASSWORD)

            def _is_initialized(self, c):
                res = super(SQLCipherDatabaseTesting, self)._is_initialized(c)
                if self._try == 1:
                    self._is_initialized_invocations += 1
                    if self._is_initialized_invocations == 2:
                        t2.start()
                        # hard to do better and have a generic test
                        time.sleep(0.05)
                return res

        outcome2 = []

        def second_try():
            try:
                db2 = SQLCipherDatabaseTesting(dbname, 2)
            except Exception, e:
                outcome2.append(e)
            else:
                outcome2.append(db2)

        t2 = threading.Thread(target=second_try)
        db1 = SQLCipherDatabaseTesting(dbname, 1)
        t2.join()

        self.assertIsInstance(outcome2[0], SQLCipherDatabaseTesting)
        db2 = outcome2[0]
        self.assertTrue(db2._is_initialized(db1._get_sqlite_handle().cursor()))


class TestAlternativeDocument(LeapDocument):
    """A (not very) alternative implementation of Document."""


class TestSQLCipherPartialExpandDatabase(
        test_sqlite_backend.TestSQLitePartialExpandDatabase):

    # The following tests had to be cloned from u1db because they all
    # instantiate the backend directly, so we need to change that in order to
    # our backend be instantiated in place.

    def setUp(self):
        super(test_sqlite_backend.TestSQLitePartialExpandDatabase,
              self).setUp()
        self.db = SQLCipherDatabase(':memory:', PASSWORD)
        self.db._set_replica_uid('test')

    def test_default_replica_uid(self):
        self.db = SQLCipherDatabase(':memory:', PASSWORD)
        self.assertIsNot(None, self.db._replica_uid)
        self.assertEqual(32, len(self.db._replica_uid))
        int(self.db._replica_uid, 16)

    def test__parse_index(self):
        self.db = SQLCipherDatabase(':memory:', PASSWORD)
        g = self.db._parse_index_definition('fieldname')
        self.assertIsInstance(g, query_parser.ExtractField)
        self.assertEqual(['fieldname'], g.field)

    def test__update_indexes(self):
        self.db = SQLCipherDatabase(':memory:', PASSWORD)
        g = self.db._parse_index_definition('fieldname')
        c = self.db._get_sqlite_handle().cursor()
        self.db._update_indexes('doc-id', {'fieldname': 'val'},
                                [('fieldname', g)], c)
        c.execute('SELECT doc_id, field_name, value FROM document_fields')
        self.assertEqual([('doc-id', 'fieldname', 'val')],
                         c.fetchall())

    def test__set_replica_uid(self):
        # Start from scratch, so that replica_uid isn't set.
        self.db = SQLCipherDatabase(':memory:', PASSWORD)
        self.assertIsNot(None, self.db._real_replica_uid)
        self.assertIsNot(None, self.db._replica_uid)
        self.db._set_replica_uid('foo')
        c = self.db._get_sqlite_handle().cursor()
        c.execute("SELECT value FROM u1db_config WHERE name='replica_uid'")
        self.assertEqual(('foo',), c.fetchone())
        self.assertEqual('foo', self.db._real_replica_uid)
        self.assertEqual('foo', self.db._replica_uid)
        self.db._close_sqlite_handle()
        self.assertEqual('foo', self.db._replica_uid)

    def test__open_database(self):
        temp_dir = self.createTempDir(prefix='u1db-test-')
        path = temp_dir + '/test.sqlite'
        SQLCipherDatabase(path, PASSWORD)
        db2 = SQLCipherDatabase._open_database(path, PASSWORD)
        self.assertIsInstance(db2, SQLCipherDatabase)

    def test__open_database_with_factory(self):
        temp_dir = self.createTempDir(prefix='u1db-test-')
        path = temp_dir + '/test.sqlite'
        SQLCipherDatabase(path, PASSWORD)
        db2 = SQLCipherDatabase._open_database(
            path, PASSWORD,
            document_factory=TestAlternativeDocument)
        doc = db2.create_doc({})
        self.assertTrue(isinstance(doc, LeapDocument))

    def test__open_database_non_existent(self):
        temp_dir = self.createTempDir(prefix='u1db-test-')
        path = temp_dir + '/non-existent.sqlite'
        self.assertRaises(errors.DatabaseDoesNotExist,
                          SQLCipherDatabase._open_database,
                          path, PASSWORD)

    def test__open_database_during_init(self):
        temp_dir = self.createTempDir(prefix='u1db-test-')
        path = temp_dir + '/initialised.db'
        db = SQLCipherDatabase.__new__(
            SQLCipherDatabase)
        db._db_handle = dbapi2.connect(path)  # db is there but not yet init-ed
        c = db._db_handle.cursor()
        c.execute('PRAGMA key="%s"' % PASSWORD)
        self.addCleanup(db.close)
        observed = []

        class SQLiteDatabaseTesting(SQLCipherDatabase):
            WAIT_FOR_PARALLEL_INIT_HALF_INTERVAL = 0.1

            @classmethod
            def _which_index_storage(cls, c):
                res = super(SQLiteDatabaseTesting, cls)._which_index_storage(c)
                db._ensure_schema()  # init db
                observed.append(res[0])
                return res

        db2 = SQLiteDatabaseTesting._open_database(path, PASSWORD)
        self.addCleanup(db2.close)
        self.assertIsInstance(db2, SQLCipherDatabase)
        self.assertEqual(
            [None,
             SQLCipherDatabase._index_storage_value],
            observed)

    def test__open_database_invalid(self):
        class SQLiteDatabaseTesting(SQLCipherDatabase):
            WAIT_FOR_PARALLEL_INIT_HALF_INTERVAL = 0.1
        temp_dir = self.createTempDir(prefix='u1db-test-')
        path1 = temp_dir + '/invalid1.db'
        with open(path1, 'wb') as f:
            f.write("")
        self.assertRaises(dbapi2.OperationalError,
                          SQLiteDatabaseTesting._open_database, path1,
                          PASSWORD)
        with open(path1, 'wb') as f:
            f.write("invalid")
        self.assertRaises(dbapi2.DatabaseError,
                          SQLiteDatabaseTesting._open_database, path1,
                          PASSWORD)

    def test_open_database_existing(self):
        temp_dir = self.createTempDir(prefix='u1db-test-')
        path = temp_dir + '/existing.sqlite'
        SQLCipherDatabase(path, PASSWORD)
        db2 = SQLCipherDatabase.open_database(path, PASSWORD, create=False)
        self.assertIsInstance(db2, SQLCipherDatabase)

    def test_open_database_with_factory(self):
        temp_dir = self.createTempDir(prefix='u1db-test-')
        path = temp_dir + '/existing.sqlite'
        SQLCipherDatabase(path, PASSWORD)
        db2 = SQLCipherDatabase.open_database(
            path, PASSWORD, create=False,
            document_factory=TestAlternativeDocument)
        doc = db2.create_doc({})
        self.assertTrue(isinstance(doc, LeapDocument))

    def test_open_database_create(self):
        temp_dir = self.createTempDir(prefix='u1db-test-')
        path = temp_dir + '/new.sqlite'
        SQLCipherDatabase.open_database(path, PASSWORD, create=True)
        db2 = SQLCipherDatabase.open_database(path, PASSWORD, create=False)
        self.assertIsInstance(db2, SQLCipherDatabase)

    def test_create_database_initializes_schema(self):
        # This test had to be cloned because our implementation of SQLCipher
        # backend is referenced with an index_storage_value that includes the
        # word "encrypted". See u1db's sqlite_backend and our
        # sqlcipher_backend for reference.
        raw_db = self.db._get_sqlite_handle()
        c = raw_db.cursor()
        c.execute("SELECT * FROM u1db_config")
        config = dict([(r[0], r[1]) for r in c.fetchall()])
        self.assertEqual({'sql_schema': '0', 'replica_uid': 'test',
                          'index_storage': 'expand referenced encrypted'},
                         config)

    def test_store_syncable(self):
        doc = self.db.create_doc_from_json(tests.simple_doc)
        # assert that docs are syncable by default
        self.assertEqual(True, doc.syncable)
        # assert that we can store syncable = False
        doc.syncable = False
        self.db.put_doc(doc)
        self.assertEqual(False, self.db.get_doc(doc.doc_id).syncable)
        # assert that we can store syncable = True
        doc.syncable = True
        self.db.put_doc(doc)
        self.assertEqual(True, self.db.get_doc(doc.doc_id).syncable)


#-----------------------------------------------------------------------------
# The following tests come from `u1db.tests.test_open`.
#-----------------------------------------------------------------------------

class SQLCipherOpen(test_open.TestU1DBOpen):

    def test_open_no_create(self):
        self.assertRaises(errors.DatabaseDoesNotExist,
                          u1db_open, self.db_path,
                          password=PASSWORD,
                          create=False)
        self.assertFalse(os.path.exists(self.db_path))

    def test_open_create(self):
        db = u1db_open(self.db_path, password=PASSWORD, create=True)
        self.addCleanup(db.close)
        self.assertTrue(os.path.exists(self.db_path))
        self.assertIsInstance(db, SQLCipherDatabase)

    def test_open_with_factory(self):
        db = u1db_open(self.db_path, password=PASSWORD, create=True,
                       document_factory=TestAlternativeDocument)
        self.addCleanup(db.close)
        doc = db.create_doc({})
        self.assertTrue(isinstance(doc, LeapDocument))

    def test_open_existing(self):
        db = SQLCipherDatabase(self.db_path, PASSWORD)
        self.addCleanup(db.close)
        doc = db.create_doc_from_json(tests.simple_doc)
        # Even though create=True, we shouldn't wipe the db
        db2 = u1db_open(self.db_path, password=PASSWORD, create=True)
        self.addCleanup(db2.close)
        doc2 = db2.get_doc(doc.doc_id)
        self.assertEqual(doc, doc2)

    def test_open_existing_no_create(self):
        db = SQLCipherDatabase(self.db_path, PASSWORD)
        self.addCleanup(db.close)
        db2 = u1db_open(self.db_path, password=PASSWORD, create=False)
        self.addCleanup(db2.close)
        self.assertIsInstance(db2, SQLCipherDatabase)


#-----------------------------------------------------------------------------
# The following tests come from `u1db.tests.test_sync`.
#-----------------------------------------------------------------------------

sync_scenarios = []
for name, scenario in SQLCIPHER_SCENARIOS:
    scenario = dict(scenario)
    scenario['do_sync'] = test_sync.sync_via_synchronizer
    sync_scenarios.append((name, scenario))
    scenario = dict(scenario)


def sync_via_synchronizer_and_leap(test, db_source, db_target,
                                   trace_hook=None, trace_hook_shallow=None):
    if trace_hook:
        test.skipTest("full trace hook unsupported over http")
    path = test._http_at[db_target]
    target = LeapSyncTarget.connect(test.getURL(path))
    if trace_hook_shallow:
        target._set_trace_hook_shallow(trace_hook_shallow)
    return sync.Synchronizer(db_source, target).sync()


sync_scenarios.append(('pyleap', {
    'make_database_for_test': test_sync.make_database_for_http_test,
    'copy_database_for_test': test_sync.copy_database_for_http_test,
    'make_document_for_test': tests.make_document_for_test,
    'make_app_with_state': tests.test_remote_sync_target.make_http_app,
    'do_sync': sync_via_synchronizer_and_leap,
}))


class SQLCipherDatabaseSyncTests(test_sync.DatabaseSyncTests):

    scenarios = sync_scenarios


def _make_local_db_and_leap_target(test, path='test'):
    test.startServer()
    db = test.request_state._create_database(os.path.basename(path))
    st = LeapSyncTarget.connect(test.getURL(path))
    return db, st


target_scenarios = [
    ('leap', {
        'create_db_and_target': _make_local_db_and_leap_target,
        'make_app_with_state': tests.test_remote_sync_target.make_http_app}),
]


class SQLCipherSyncTargetTests(test_sync.DatabaseSyncTargetTests):

    scenarios = (tests.multiply_scenarios(SQLCIPHER_SCENARIOS,
                                          target_scenarios))


#-----------------------------------------------------------------------------
# Tests for actual encryption of the database
#-----------------------------------------------------------------------------

class SQLCipherEncryptionTest(BaseLeapTest):
    """
    Tests to guarantee SQLCipher is indeed encrypting data when storing.
    """

    def _delete_dbfiles(self):
        for dbfile in [self.DB_FILE]:
            if os.path.exists(dbfile):
                os.unlink(dbfile)

    def setUp(self):
        self.DB_FILE = self.tempdir + '/test.db'
        self._delete_dbfiles()

    def tearDown(self):
        self._delete_dbfiles()

    def test_try_to_open_encrypted_db_with_sqlite_backend(self):
        """
        SQLite backend should not succeed to open SQLCipher databases.
        """
        db = SQLCipherDatabase(self.DB_FILE, PASSWORD)
        doc = db.create_doc_from_json(tests.simple_doc)
        db.close()
        try:
            # trying to open an encrypted database with the regular u1db
            # backend should raise a DatabaseError exception.
            SQLitePartialExpandDatabase(self.DB_FILE,
                                        document_factory=LeapDocument)
            raise DatabaseIsNotEncrypted()
        except dbapi2.DatabaseError:
            # at this point we know that the regular U1DB sqlcipher backend
            # did not succeed on opening the database, so it was indeed
            # encrypted.
            db = SQLCipherDatabase(self.DB_FILE, PASSWORD)
            doc = db.get_doc(doc.doc_id)
            self.assertEqual(tests.simple_doc, doc.get_json(),
                             'decrypted content mismatch')

    def test_try_to_open_raw_db_with_sqlcipher_backend(self):
        """
        SQLCipher backend should not succeed to open unencrypted databases.
        """
        db = SQLitePartialExpandDatabase(self.DB_FILE,
                                         document_factory=LeapDocument)
        db.create_doc_from_json(tests.simple_doc)
        db.close()
        try:
            # trying to open the a non-encrypted database with sqlcipher
            # backend should raise a DatabaseIsNotEncrypted exception.
            SQLCipherDatabase(self.DB_FILE, PASSWORD)
            raise db1pi2.DatabaseError(
                "SQLCipher backend should not be able to open non-encrypted "
                "dbs.")
        except DatabaseIsNotEncrypted:
            pass


load_tests = tests.load_with_scenarios