Missing optional lib

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diff --git a/lib/Python/Lib/Crypto/SelfTest/Cipher/test_ARC2.py b/lib/Python/Lib/Crypto/SelfTest/Cipher/test_ARC2.py
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+++ b/lib/Python/Lib/Crypto/SelfTest/Cipher/test_ARC2.py
@@ -0,0 +1,124 @@
+# -*- coding: utf-8 -*-
+#
+#  SelfTest/Cipher/ARC2.py: Self-test for the Alleged-RC2 cipher
+#
+# Written in 2008 by Dwayne C. Litzenberger <dlitz@dlitz.net>
+#
+# ===================================================================
+# The contents of this file are dedicated to the public domain.  To
+# the extent that dedication to the public domain is not available,
+# everyone is granted a worldwide, perpetual, royalty-free,
+# non-exclusive license to exercise all rights associated with the
+# contents of this file for any purpose whatsoever.
+# No rights are reserved.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+# ===================================================================
+
+"""Self-test suite for Crypto.Cipher.ARC2"""
+
+__revision__ = "$Id$"
+
+from common import dict     # For compatibility with Python 2.1 and 2.2
+
+import unittest
+from Crypto.Util.py3compat import *
+
+# This is a list of (plaintext, ciphertext, key[, description[, extra_params]]) tuples.
+test_data = [
+    # Test vectors from RFC 2268
+
+    # 63-bit effective key length
+    ('0000000000000000', 'ebb773f993278eff', '0000000000000000',
+        'RFC2268-1', dict(effective_keylen=63)),
+
+    # 64-bit effective key length
+    ('ffffffffffffffff', '278b27e42e2f0d49', 'ffffffffffffffff',
+        'RFC2268-2', dict(effective_keylen=64)),
+    ('1000000000000001', '30649edf9be7d2c2', '3000000000000000',
+        'RFC2268-3', dict(effective_keylen=64)),
+    ('0000000000000000', '61a8a244adacccf0', '88',
+        'RFC2268-4', dict(effective_keylen=64)),
+    ('0000000000000000', '6ccf4308974c267f', '88bca90e90875a',
+        'RFC2268-5', dict(effective_keylen=64)),
+    ('0000000000000000', '1a807d272bbe5db1', '88bca90e90875a7f0f79c384627bafb2',
+        'RFC2268-6', dict(effective_keylen=64)),
+
+    # 128-bit effective key length
+    ('0000000000000000', '2269552ab0f85ca6', '88bca90e90875a7f0f79c384627bafb2',
+        "RFC2268-7", dict(effective_keylen=128)),
+    ('0000000000000000', '5b78d3a43dfff1f1',
+        '88bca90e90875a7f0f79c384627bafb216f80a6f85920584c42fceb0be255daf1e',
+        "RFC2268-8", dict(effective_keylen=129)),
+
+    # Test vectors from PyCrypto 2.0.1's testdata.py
+    # 1024-bit effective key length
+    ('0000000000000000', '624fb3e887419e48', '5068696c6970476c617373',
+        'PCTv201-0'),
+    ('ffffffffffffffff', '79cadef44c4a5a85', '5068696c6970476c617373',
+        'PCTv201-1'),
+    ('0001020304050607', '90411525b34e4c2c', '5068696c6970476c617373',
+        'PCTv201-2'),
+    ('0011223344556677', '078656aaba61cbfb', '5068696c6970476c617373',
+        'PCTv201-3'),
+    ('0000000000000000', 'd7bcc5dbb4d6e56a', 'ffffffffffffffff',
+        'PCTv201-4'),
+    ('ffffffffffffffff', '7259018ec557b357', 'ffffffffffffffff',
+        'PCTv201-5'),
+    ('0001020304050607', '93d20a497f2ccb62', 'ffffffffffffffff',
+        'PCTv201-6'),
+    ('0011223344556677', 'cb15a7f819c0014d', 'ffffffffffffffff',
+        'PCTv201-7'),
+    ('0000000000000000', '63ac98cdf3843a7a', 'ffffffffffffffff5065746572477265656e6177617953e5ffe553',
+        'PCTv201-8'),
+    ('ffffffffffffffff', '3fb49e2fa12371dd', 'ffffffffffffffff5065746572477265656e6177617953e5ffe553',
+        'PCTv201-9'),
+    ('0001020304050607', '46414781ab387d5f', 'ffffffffffffffff5065746572477265656e6177617953e5ffe553',
+        'PCTv201-10'),
+    ('0011223344556677', 'be09dc81feaca271', 'ffffffffffffffff5065746572477265656e6177617953e5ffe553',
+        'PCTv201-11'),
+    ('0000000000000000', 'e64221e608be30ab', '53e5ffe553',
+        'PCTv201-12'),
+    ('ffffffffffffffff', '862bc60fdcd4d9a9', '53e5ffe553',
+        'PCTv201-13'),
+    ('0001020304050607', '6a34da50fa5e47de', '53e5ffe553',
+        'PCTv201-14'),
+    ('0011223344556677', '584644c34503122c', '53e5ffe553',
+        'PCTv201-15'),
+]
+
+class BufferOverflowTest(unittest.TestCase):
+    # Test a buffer overflow found in older versions of PyCrypto
+
+    def setUp(self):
+        global ARC2
+        from Crypto.Cipher import ARC2
+
+    def runTest(self):
+        """ARC2 with keylength > 128"""
+        key = "x" * 16384
+        mode = ARC2.MODE_ECB
+        self.assertRaises(ValueError, ARC2.new, key, mode)
+
+def get_tests(config={}):
+    from Crypto.Cipher import ARC2
+    from common import make_block_tests
+
+    tests = make_block_tests(ARC2, "ARC2", test_data)
+    tests.append(BufferOverflowTest())
+
+    return tests
+
+if __name__ == '__main__':
+    import unittest
+    suite = lambda: unittest.TestSuite(get_tests())
+    unittest.main(defaultTest='suite')
+
+# vim:set ts=4 sw=4 sts=4 expandtab: