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# -*- coding: utf-8 -*-
#
#  SelfTest/Cipher/DES.py: Self-test for the (Single) DES cipher
#
# Written in 2008 by Dwayne C. Litzenberger <[email protected]>
#
# ===================================================================
# 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.DES"""

import unittest

from Crypto.Cipher import DES

# This is a list of (plaintext, ciphertext, key, description) tuples.
SP800_17_B1_KEY = '01' * 8
SP800_17_B2_PT = '00' * 8
test_data = [
    # Test vectors from Appendix A of NIST SP 800-17
    # "Modes of Operation Validation System (MOVS): Requirements and Procedures"
    # http://csrc.nist.gov/publications/nistpubs/800-17/800-17.pdf

    # Appendix A - "Sample Round Outputs for the DES"
    ('0000000000000000', '82dcbafbdeab6602', '10316e028c8f3b4a',
        "NIST SP800-17 A"),

    # Table B.1 - Variable Plaintext Known Answer Test
    ('8000000000000000', '95f8a5e5dd31d900', SP800_17_B1_KEY,
        'NIST SP800-17 B.1 #0'),
    ('4000000000000000', 'dd7f121ca5015619', SP800_17_B1_KEY,
        'NIST SP800-17 B.1 #1'),
    ('2000000000000000', '2e8653104f3834ea', SP800_17_B1_KEY,
        'NIST SP800-17 B.1 #2'),
    ('1000000000000000', '4bd388ff6cd81d4f', SP800_17_B1_KEY,
        'NIST SP800-17 B.1 #3'),
    ('0800000000000000', '20b9e767b2fb1456', SP800_17_B1_KEY,
        'NIST SP800-17 B.1 #4'),
    ('0400000000000000', '55579380d77138ef', SP800_17_B1_KEY,
        'NIST SP800-17 B.1 #5'),
    ('0200000000000000', '6cc5defaaf04512f', SP800_17_B1_KEY,
        'NIST SP800-17 B.1 #6'),
    ('0100000000000000', '0d9f279ba5d87260', SP800_17_B1_KEY,
        'NIST SP800-17 B.1 #7'),
    ('0080000000000000', 'd9031b0271bd5a0a', SP800_17_B1_KEY,
        'NIST SP800-17 B.1 #8'),
    ('0040000000000000', '424250b37c3dd951', SP800_17_B1_KEY,
        'NIST SP800-17 B.1 #9'),
    ('0020000000000000', 'b8061b7ecd9a21e5', SP800_17_B1_KEY,
        'NIST SP800-17 B.1 #10'),
    ('0010000000000000', 'f15d0f286b65bd28', SP800_17_B1_KEY,
        'NIST SP800-17 B.1 #11'),
    ('0008000000000000', 'add0cc8d6e5deba1', SP800_17_B1_KEY,
        'NIST SP800-17 B.1 #12'),
    ('0004000000000000', 'e6d5f82752ad63d1', SP800_17_B1_KEY,
        'NIST SP800-17 B.1 #13'),
    ('0002000000000000', 'ecbfe3bd3f591a5e', SP800_17_B1_KEY,
        'NIST SP800-17 B.1 #14'),
    ('0001000000000000', 'f356834379d165cd', SP800_17_B1_KEY,
        'NIST SP800-17 B.1 #15'),
    ('0000800000000000', '2b9f982f20037fa9', SP800_17_B1_KEY,
        'NIST SP800-17 B.1 #16'),
    ('0000400000000000', '889de068a16f0be6', SP800_17_B1_KEY,
        'NIST SP800-17 B.1 #17'),
    ('0000200000000000', 'e19e275d846a1298', SP800_17_B1_KEY,
        'NIST SP800-17 B.1 #18'),
    ('0000100000000000', '329a8ed523d71aec', SP800_17_B1_KEY,
        'NIST SP800-17 B.1 #19'),
    ('0000080000000000', 'e7fce22557d23c97', SP800_17_B1_KEY,
        'NIST SP800-17 B.1 #20'),
    ('0000040000000000', '12a9f5817ff2d65d', SP800_17_B1_KEY,
        'NIST SP800-17 B.1 #21'),
    ('0000020000000000', 'a484c3ad38dc9c19', SP800_17_B1_KEY,
        'NIST SP800-17 B.1 #22'),
    ('0000010000000000', 'fbe00a8a1ef8ad72', SP800_17_B1_KEY,
        'NIST SP800-17 B.1 #23'),
    ('0000008000000000', '750d079407521363', SP800_17_B1_KEY,
        'NIST SP800-17 B.1 #24'),
    ('0000004000000000', '64feed9c724c2faf', SP800_17_B1_KEY,
        'NIST SP800-17 B.1 #25'),
    ('0000002000000000', 'f02b263b328e2b60', SP800_17_B1_KEY,
        'NIST SP800-17 B.1 #26'),
    ('0000001000000000', '9d64555a9a10b852', SP800_17_B1_KEY,
        'NIST SP800-17 B.1 #27'),
    ('0000000800000000', 'd106ff0bed5255d7', SP800_17_B1_KEY,
        'NIST SP800-17 B.1 #28'),
    ('0000000400000000', 'e1652c6b138c64a5', SP800_17_B1_KEY,
        'NIST SP800-17 B.1 #29'),
    ('0000000200000000', 'e428581186ec8f46', SP800_17_B1_KEY,
        'NIST SP800-17 B.1 #30'),
    ('0000000100000000', 'aeb5f5ede22d1a36', SP800_17_B1_KEY,
        'NIST SP800-17 B.1 #31'),
    ('0000000080000000', 'e943d7568aec0c5c', SP800_17_B1_KEY,
        'NIST SP800-17 B.1 #32'),
    ('0000000040000000', 'df98c8276f54b04b', SP800_17_B1_KEY,
        'NIST SP800-17 B.1 #33'),
    ('0000000020000000', 'b160e4680f6c696f', SP800_17_B1_KEY,
        'NIST SP800-17 B.1 #34'),
    ('0000000010000000', 'fa0752b07d9c4ab8', SP800_17_B1_KEY,
        'NIST SP800-17 B.1 #35'),
    ('0000000008000000', 'ca3a2b036dbc8502', SP800_17_B1_KEY,
        'NIST SP800-17 B.1 #36'),
    ('0000000004000000', '5e0905517bb59bcf', SP800_17_B1_KEY,
        'NIST SP800-17 B.1 #37'),
    ('0000000002000000', '814eeb3b91d90726', SP800_17_B1_KEY,
        'NIST SP800-17 B.1 #38'),
    ('0000000001000000', '4d49db1532919c9f', SP800_17_B1_KEY,
        'NIST SP800-17 B.1 #39'),
    ('0000000000800000', '25eb5fc3f8cf0621', SP800_17_B1_KEY,
        'NIST SP800-17 B.1 #40'),
    ('0000000000400000', 'ab6a20c0620d1c6f', SP800_17_B1_KEY,
        'NIST SP800-17 B.1 #41'),
    ('0000000000200000', '79e90dbc98f92cca', SP800_17_B1_KEY,
        'NIST SP800-17 B.1 #42'),
    ('0000000000100000', '866ecedd8072bb0e', SP800_17_B1_KEY,
        'NIST SP800-17 B.1 #43'),
    ('0000000000080000', '8b54536f2f3e64a8', SP800_17_B1_KEY,
        'NIST SP800-17 B.1 #44'),
    ('0000000000040000', 'ea51d3975595b86b', SP800_17_B1_KEY,
        'NIST SP800-17 B.1 #45'),
    ('0000000000020000', 'caffc6ac4542de31', SP800_17_B1_KEY,
        'NIST SP800-17 B.1 #46'),
    ('0000000000010000', '8dd45a2ddf90796c', SP800_17_B1_KEY,
        'NIST SP800-17 B.1 #47'),
    ('0000000000008000', '1029d55e880ec2d0', SP800_17_B1_KEY,
        'NIST SP800-17 B.1 #48'),
    ('0000000000004000', '5d86cb23639dbea9', SP800_17_B1_KEY,
        'NIST SP800-17 B.1 #49'),
    ('0000000000002000', '1d1ca853ae7c0c5f', SP800_17_B1_KEY,
        'NIST SP800-17 B.1 #50'),
    ('0000000000001000', 'ce332329248f3228', SP800_17_B1_KEY,
        'NIST SP800-17 B.1 #51'),
    ('0000000000000800', '8405d1abe24fb942', SP800_17_B1_KEY,
        'NIST SP800-17 B.1 #52'),
    ('0000000000000400', 'e643d78090ca4207', SP800_17_B1_KEY,
        'NIST SP800-17 B.1 #53'),
    ('0000000000000200', '48221b9937748a23', SP800_17_B1_KEY,
        'NIST SP800-17 B.1 #54'),
    ('0000000000000100', 'dd7c0bbd61fafd54', SP800_17_B1_KEY,
        'NIST SP800-17 B.1 #55'),
    ('0000000000000080', '2fbc291a570db5c4', SP800_17_B1_KEY,
        'NIST SP800-17 B.1 #56'),
    ('0000000000000040', 'e07c30d7e4e26e12', SP800_17_B1_KEY,
        'NIST SP800-17 B.1 #57'),
    ('0000000000000020', '0953e2258e8e90a1', SP800_17_B1_KEY,
        'NIST SP800-17 B.1 #58'),
    ('0000000000000010', '5b711bc4ceebf2ee', SP800_17_B1_KEY,
        'NIST SP800-17 B.1 #59'),
    ('0000000000000008', 'cc083f1e6d9e85f6', SP800_17_B1_KEY,
        'NIST SP800-17 B.1 #60'),
    ('0000000000000004', 'd2fd8867d50d2dfe', SP800_17_B1_KEY,
        'NIST SP800-17 B.1 #61'),
    ('0000000000000002', '06e7ea22ce92708f', SP800_17_B1_KEY,
        'NIST SP800-17 B.1 #62'),
    ('0000000000000001', '166b40b44aba4bd6', SP800_17_B1_KEY,
        'NIST SP800-17 B.1 #63'),

    # Table B.2 - Variable Key Known Answer Test
    (SP800_17_B2_PT, '95a8d72813daa94d', '8001010101010101',
        'NIST SP800-17 B.2 #0'),
    (SP800_17_B2_PT, '0eec1487dd8c26d5', '4001010101010101',
        'NIST SP800-17 B.2 #1'),
    (SP800_17_B2_PT, '7ad16ffb79c45926', '2001010101010101',
        'NIST SP800-17 B.2 #2'),
    (SP800_17_B2_PT, 'd3746294ca6a6cf3', '1001010101010101',
        'NIST SP800-17 B.2 #3'),
    (SP800_17_B2_PT, '809f5f873c1fd761', '0801010101010101',
        'NIST SP800-17 B.2 #4'),
    (SP800_17_B2_PT, 'c02faffec989d1fc', '0401010101010101',
        'NIST SP800-17 B.2 #5'),
    (SP800_17_B2_PT, '4615aa1d33e72f10', '0201010101010101',
        'NIST SP800-17 B.2 #6'),
    (SP800_17_B2_PT, '2055123350c00858', '0180010101010101',
        'NIST SP800-17 B.2 #7'),
    (SP800_17_B2_PT, 'df3b99d6577397c8', '0140010101010101',
        'NIST SP800-17 B.2 #8'),
    (SP800_17_B2_PT, '31fe17369b5288c9', '0120010101010101',
        'NIST SP800-17 B.2 #9'),
    (SP800_17_B2_PT, 'dfdd3cc64dae1642', '0110010101010101',
        'NIST SP800-17 B.2 #10'),
    (SP800_17_B2_PT, '178c83ce2b399d94', '0108010101010101',
        'NIST SP800-17 B.2 #11'),
    (SP800_17_B2_PT, '50f636324a9b7f80', '0104010101010101',
        'NIST SP800-17 B.2 #12'),
    (SP800_17_B2_PT, 'a8468ee3bc18f06d', '0102010101010101',
        'NIST SP800-17 B.2 #13'),
    (SP800_17_B2_PT, 'a2dc9e92fd3cde92', '0101800101010101',
        'NIST SP800-17 B.2 #14'),
    (SP800_17_B2_PT, 'cac09f797d031287', '0101400101010101',
        'NIST SP800-17 B.2 #15'),
    (SP800_17_B2_PT, '90ba680b22aeb525', '0101200101010101',
        'NIST SP800-17 B.2 #16'),
    (SP800_17_B2_PT, 'ce7a24f350e280b6', '0101100101010101',
        'NIST SP800-17 B.2 #17'),
    (SP800_17_B2_PT, '882bff0aa01a0b87', '0101080101010101',
        'NIST SP800-17 B.2 #18'),
    (SP800_17_B2_PT, '25610288924511c2', '0101040101010101',
        'NIST SP800-17 B.2 #19'),
    (SP800_17_B2_PT, 'c71516c29c75d170', '0101020101010101',
        'NIST SP800-17 B.2 #20'),
    (SP800_17_B2_PT, '5199c29a52c9f059', '0101018001010101',
        'NIST SP800-17 B.2 #21'),
    (SP800_17_B2_PT, 'c22f0a294a71f29f', '0101014001010101',
        'NIST SP800-17 B.2 #22'),
    (SP800_17_B2_PT, 'ee371483714c02ea', '0101012001010101',
        'NIST SP800-17 B.2 #23'),
    (SP800_17_B2_PT, 'a81fbd448f9e522f', '0101011001010101',
        'NIST SP800-17 B.2 #24'),
    (SP800_17_B2_PT, '4f644c92e192dfed', '0101010801010101',
        'NIST SP800-17 B.2 #25'),
    (SP800_17_B2_PT, '1afa9a66a6df92ae', '0101010401010101',
        'NIST SP800-17 B.2 #26'),
    (SP800_17_B2_PT, 'b3c1cc715cb879d8', '0101010201010101',
        'NIST SP800-17 B.2 #27'),
    (SP800_17_B2_PT, '19d032e64ab0bd8b', '0101010180010101',
        'NIST SP800-17 B.2 #28'),
    (SP800_17_B2_PT, '3cfaa7a7dc8720dc', '0101010140010101',
        'NIST SP800-17 B.2 #29'),
    (SP800_17_B2_PT, 'b7265f7f447ac6f3', '0101010120010101',
        'NIST SP800-17 B.2 #30'),
    (SP800_17_B2_PT, '9db73b3c0d163f54', '0101010110010101',
        'NIST SP800-17 B.2 #31'),
    (SP800_17_B2_PT, '8181b65babf4a975', '0101010108010101',
        'NIST SP800-17 B.2 #32'),
    (SP800_17_B2_PT, '93c9b64042eaa240', '0101010104010101',
        'NIST SP800-17 B.2 #33'),
    (SP800_17_B2_PT, '5570530829705592', '0101010102010101',
        'NIST SP800-17 B.2 #34'),
    (SP800_17_B2_PT, '8638809e878787a0', '0101010101800101',
        'NIST SP800-17 B.2 #35'),
    (SP800_17_B2_PT, '41b9a79af79ac208', '0101010101400101',
        'NIST SP800-17 B.2 #36'),
    (SP800_17_B2_PT, '7a9be42f2009a892', '0101010101200101',
        'NIST SP800-17 B.2 #37'),
    (SP800_17_B2_PT, '29038d56ba6d2745', '0101010101100101',
        'NIST SP800-17 B.2 #38'),
    (SP800_17_B2_PT, '5495c6abf1e5df51', '0101010101080101',
        'NIST SP800-17 B.2 #39'),
    (SP800_17_B2_PT, 'ae13dbd561488933', '0101010101040101',
        'NIST SP800-17 B.2 #40'),
    (SP800_17_B2_PT, '024d1ffa8904e389', '0101010101020101',
        'NIST SP800-17 B.2 #41'),
    (SP800_17_B2_PT, 'd1399712f99bf02e', '0101010101018001',
        'NIST SP800-17 B.2 #42'),
    (SP800_17_B2_PT, '14c1d7c1cffec79e', '0101010101014001',
        'NIST SP800-17 B.2 #43'),
    (SP800_17_B2_PT, '1de5279dae3bed6f', '0101010101012001',
        'NIST SP800-17 B.2 #44'),
    (SP800_17_B2_PT, 'e941a33f85501303', '0101010101011001',
        'NIST SP800-17 B.2 #45'),
    (SP800_17_B2_PT, 'da99dbbc9a03f379', '0101010101010801',
        'NIST SP800-17 B.2 #46'),
    (SP800_17_B2_PT, 'b7fc92f91d8e92e9', '0101010101010401',
        'NIST SP800-17 B.2 #47'),
    (SP800_17_B2_PT, 'ae8e5caa3ca04e85', '0101010101010201',
        'NIST SP800-17 B.2 #48'),
    (SP800_17_B2_PT, '9cc62df43b6eed74', '0101010101010180',
        'NIST SP800-17 B.2 #49'),
    (SP800_17_B2_PT, 'd863dbb5c59a91a0', '0101010101010140',
        'NIST SP800-17 B.2 #50'),
    (SP800_17_B2_PT, 'a1ab2190545b91d7', '0101010101010120',
        'NIST SP800-17 B.2 #51'),
    (SP800_17_B2_PT, '0875041e64c570f7', '0101010101010110',
        'NIST SP800-17 B.2 #52'),
    (SP800_17_B2_PT, '5a594528bebef1cc', '0101010101010108',
        'NIST SP800-17 B.2 #53'),
    (SP800_17_B2_PT, 'fcdb3291de21f0c0', '0101010101010104',
        'NIST SP800-17 B.2 #54'),
    (SP800_17_B2_PT, '869efd7f9f265a09', '0101010101010102',
        'NIST SP800-17 B.2 #55'),
]

class RonRivestTest(unittest.TestCase):
    """ Ronald L. Rivest's DES test, see
        http://people.csail.mit.edu/rivest/Destest.txt
    ABSTRACT
    --------

    We present a simple way to test the correctness of a DES implementation:
    Use the recurrence relation:

        X0      =       9474B8E8C73BCA7D (hexadecimal)

        X(i+1)  =       IF  (i is even)  THEN  E(Xi,Xi)  ELSE  D(Xi,Xi)

    to compute a sequence of 64-bit values:  X0, X1, X2, ..., X16.  Here
    E(X,K)  denotes the DES encryption of  X  using key  K, and  D(X,K)  denotes
    the DES decryption of  X  using key  K.  If you obtain

        X16     =       1B1A2DDB4C642438

    your implementation does not have any of the 36,568 possible single-fault
    errors described herein.
    """
    def runTest(self):
        from binascii import b2a_hex

        X = []
        X[0:] = [b'\x94\x74\xB8\xE8\xC7\x3B\xCA\x7D']

        for i in range(16):
            c = DES.new(X[i],DES.MODE_ECB)
            if not (i&1): # (num&1) returns 1 for odd numbers
                X[i+1:] = [c.encrypt(X[i])] # even
            else:
                X[i+1:] = [c.decrypt(X[i])] # odd

        self.assertEqual(b2a_hex(X[16]),
            b2a_hex(b'\x1B\x1A\x2D\xDB\x4C\x64\x24\x38'))


class TestOutput(unittest.TestCase):

    def runTest(self):
        # Encrypt/Decrypt data and test output parameter

        cipher = DES.new(b'4'*8, DES.MODE_ECB)

        pt = b'5' * 8
        ct = cipher.encrypt(pt)

        output = bytearray(8)
        res = cipher.encrypt(pt, output=output)
        self.assertEqual(ct, output)
        self.assertEqual(res, None)
        
        res = cipher.decrypt(ct, output=output)
        self.assertEqual(pt, output)
        self.assertEqual(res, None)

        output = memoryview(bytearray(8))
        cipher.encrypt(pt, output=output)
        self.assertEqual(ct, output)
        
        cipher.decrypt(ct, output=output)
        self.assertEqual(pt, output)

        self.assertRaises(TypeError, cipher.encrypt, pt, output=b'0'*8)
        self.assertRaises(TypeError, cipher.decrypt, ct, output=b'0'*8)

        shorter_output = bytearray(7)
        self.assertRaises(ValueError, cipher.encrypt, pt, output=shorter_output)
        self.assertRaises(ValueError, cipher.decrypt, ct, output=shorter_output)


def get_tests(config={}):
    from .common import make_block_tests
    tests = make_block_tests(DES, "DES", test_data)
    tests += [RonRivestTest()]
    tests += [TestOutput()]
    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:

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