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-rw-r--r--src/leap/common/tests/test_crypto.py80
1 files changed, 80 insertions, 0 deletions
diff --git a/src/leap/common/tests/test_crypto.py b/src/leap/common/tests/test_crypto.py
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+++ b/src/leap/common/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 the crypto submodule.
+"""
+
+
+from leap.common.testing.basetest import BaseLeapTest
+from leap.common import crypto
+from Crypto import Random
+
+
+class CryptoTestCase(BaseLeapTest):
+
+ def setUp(self):
+ pass
+
+ def tearDown(self):
+ pass
+
+ def test_encrypt_decrypt_sym(self):
+ # generate 256-bit key
+ key = Random.new().read(32)
+ iv, cyphertext = 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 = 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 = crypto.encrypt_sym(
+ 'data', key,
+ method=crypto.EncryptionMethods.AES_256_CTR)
+ self.assertTrue(cyphertext is not None)
+ self.assertTrue(cyphertext != '')
+ self.assertTrue(cyphertext != 'data')
+ iv += 1
+ plaintext = crypto.decrypt_sym(
+ cyphertext, key, iv=iv,
+ 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 = 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 = crypto.decrypt_sym(
+ cyphertext, wrongkey, iv=iv,
+ method=crypto.EncryptionMethods.AES_256_CTR)
+ self.assertNotEqual('data', plaintext)