[test] toxify tests

- move tests to root directory
- split tests in different subdirectories
- setup a small package with common test dependencies in /testing/test_soledad
- add tox.ini that will:
  - install the test_soledad package and other test dependencies
  - install soledad common, client, server from the repository
  - run tests contianed in /testing/tests directory using pytest

This commit also removes all oauth code from tests, as we have removed the
u1db dependency (by importing it into the repo and naming it l2db) and don't
neet oauth at all right now.

1 files changed, 226 insertions, 0 deletions

diff --git a/testing/tests/client/test_crypto.py b/testing/tests/client/test_crypto.py
new file mode 100644
index 00000000..77252b46
--- /dev/null
+++ b/testing/tests/client/test_crypto.py
@@ -0,0 +1,226 @@
+# -*- 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 hashlib
+import binascii
+
+from leap.soledad.client import crypto
+from leap.soledad.common.document import SoledadDocument
+from test_soledad.util import BaseSoledadTest
+from leap.soledad.common.crypto import WrongMacError
+from leap.soledad.common.crypto import UnknownMacMethodError
+from leap.soledad.common.crypto import ENC_JSON_KEY
+from leap.soledad.common.crypto import ENC_SCHEME_KEY
+from leap.soledad.common.crypto import MAC_KEY
+from leap.soledad.common.crypto import MAC_METHOD_KEY
+
+
+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 = SoledadDocument(doc_id='id')
+        doc1.content = simpledoc
+
+        # encrypt doc
+        doc1.set_json(self._soledad._crypto.encrypt_doc(doc1))
+        # assert content is different and includes keys
+        self.assertNotEqual(
+            simpledoc, doc1.content,
+            'incorrect document encryption')
+        self.assertTrue(ENC_JSON_KEY in doc1.content)
+        self.assertTrue(ENC_SCHEME_KEY in doc1.content)
+        # decrypt doc
+        doc1.set_json(self._soledad._crypto.decrypt_doc(doc1))
+        self.assertEqual(
+            simpledoc, doc1.content, 'incorrect document encryption')
+
+
+class RecoveryDocumentTestCase(BaseSoledadTest):
+
+    def test_export_recovery_document_raw(self):
+        rd = self._soledad.secrets._export_recovery_document()
+        secret_id = rd[self._soledad.secrets.STORAGE_SECRETS_KEY].items()[0][0]
+        # assert exported secret is the same
+        secret = self._soledad.secrets._decrypt_storage_secret_version_1(
+            rd[self._soledad.secrets.STORAGE_SECRETS_KEY][secret_id])
+        self.assertEqual(secret_id, self._soledad.secrets._secret_id)
+        self.assertEqual(secret, self._soledad.secrets._secrets[secret_id])
+        # assert recovery document structure
+        encrypted_secret = rd[
+            self._soledad.secrets.STORAGE_SECRETS_KEY][secret_id]
+        self.assertTrue(self._soledad.secrets.CIPHER_KEY in encrypted_secret)
+        self.assertTrue(
+            encrypted_secret[self._soledad.secrets.CIPHER_KEY] == 'aes256')
+        self.assertTrue(self._soledad.secrets.LENGTH_KEY in encrypted_secret)
+        self.assertTrue(self._soledad.secrets.SECRET_KEY in encrypted_secret)
+
+    def test_import_recovery_document(self):
+        rd = self._soledad.secrets._export_recovery_document()
+        s = self._soledad_instance()
+        s.secrets._import_recovery_document(rd)
+        s.secrets.set_secret_id(self._soledad.secrets._secret_id)
+        self.assertEqual(self._soledad.storage_secret,
+                         s.storage_secret,
+                         'Failed settinng secret for symmetric encryption.')
+        s.close()
+
+
+class SoledadSecretsTestCase(BaseSoledadTest):
+
+    def test_new_soledad_instance_generates_one_secret(self):
+        self.assertTrue(
+            self._soledad.storage_secret is not None,
+            "Expected secret to be something different than None")
+        number_of_secrets = len(self._soledad.secrets._secrets)
+        self.assertTrue(
+            number_of_secrets == 1,
+            "Expected exactly 1 secret, got %d instead." % number_of_secrets)
+
+    def test_generated_secret_is_of_correct_type(self):
+        expected_type = str
+        self.assertIsInstance(
+            self._soledad.storage_secret, expected_type,
+            "Expected secret to be of type %s" % expected_type)
+
+    def test_generated_secret_has_correct_lengt(self):
+        expected_length = self._soledad.secrets.GEN_SECRET_LENGTH
+        actual_length = len(self._soledad.storage_secret)
+        self.assertTrue(
+            expected_length == actual_length,
+            "Expected secret with length %d, got %d instead."
+            % (expected_length, actual_length))
+
+    def test_generated_secret_id_is_sha256_hash_of_secret(self):
+        generated = self._soledad.secrets.secret_id
+        expected = hashlib.sha256(self._soledad.storage_secret).hexdigest()
+        self.assertTrue(
+            generated == expected,
+            "Expeceted generated secret id to be sha256 hash, got something "
+            "else instead.")
+
+    def test_generate_new_secret_generates_different_secret_id(self):
+        # generate new secret
+        secret_id_1 = self._soledad.secrets.secret_id
+        secret_id_2 = self._soledad.secrets._gen_secret()
+        self.assertTrue(
+            len(self._soledad.secrets._secrets) == 2,
+            "Expected exactly 2 secrets.")
+        self.assertTrue(
+            secret_id_1 != secret_id_2,
+            "Expected IDs of secrets to be distinct.")
+        self.assertTrue(
+            secret_id_1 in self._soledad.secrets._secrets,
+            "Expected to find ID of first secret in Soledad Secrets.")
+        self.assertTrue(
+            secret_id_2 in self._soledad.secrets._secrets,
+            "Expected to find ID of second secret in Soledad Secrets.")
+
+    def test__has_secret(self):
+        self.assertTrue(
+            self._soledad._secrets._has_secret(),
+            "Should have a secret at this point")
+
+
+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 = SoledadDocument(doc_id='id')
+        doc.content = simpledoc
+        # encrypt doc
+        doc.set_json(self._soledad._crypto.encrypt_doc(doc))
+        self.assertTrue(MAC_KEY in doc.content)
+        self.assertTrue(MAC_METHOD_KEY in doc.content)
+        # mess with MAC
+        doc.content[MAC_KEY] = '1234567890ABCDEF'
+        # try to decrypt doc
+        self.assertRaises(
+            WrongMacError,
+            self._soledad._crypto.decrypt_doc, 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 = SoledadDocument(doc_id='id')
+        doc.content = simpledoc
+        # encrypt doc
+        doc.set_json(self._soledad._crypto.encrypt_doc(doc))
+        self.assertTrue(MAC_KEY in doc.content)
+        self.assertTrue(MAC_METHOD_KEY in doc.content)
+        # mess with MAC method
+        doc.content[MAC_METHOD_KEY] = 'mymac'
+        # try to decrypt doc
+        self.assertRaises(
+            UnknownMacMethodError,
+            self._soledad._crypto.decrypt_doc, doc)
+
+
+class SoledadCryptoAESTestCase(BaseSoledadTest):
+
+    def test_encrypt_decrypt_sym(self):
+        # generate 256-bit key
+        key = os.urandom(32)
+        iv, cyphertext = crypto.encrypt_sym('data', key)
+        self.assertTrue(cyphertext is not None)
+        self.assertTrue(cyphertext != '')
+        self.assertTrue(cyphertext != 'data')
+        plaintext = crypto.decrypt_sym(cyphertext, key, iv)
+        self.assertEqual('data', plaintext)
+
+    def test_decrypt_with_wrong_iv_fails(self):
+        key = os.urandom(32)
+        iv, cyphertext = crypto.encrypt_sym('data', key)
+        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 = crypto.decrypt_sym(
+            cyphertext, key, iv=binascii.b2a_base64(wrongiv))
+        self.assertNotEqual('data', plaintext)
+
+    def test_decrypt_with_wrong_key_fails(self):
+        key = os.urandom(32)
+        iv, cyphertext = crypto.encrypt_sym('data', key)
+        self.assertTrue(cyphertext is not None)
+        self.assertTrue(cyphertext != '')
+        self.assertTrue(cyphertext != 'data')
+        wrongkey = os.urandom(32)  # 256-bits key
+        # ensure keys are different in case we are extremely lucky
+        while wrongkey == key:
+            wrongkey = os.urandom(32)
+        plaintext = crypto.decrypt_sym(cyphertext, wrongkey, iv)
+        self.assertNotEqual('data', plaintext)