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# -*- coding: utf-8 -*-
#
#  SelfTest/Hash/MD5.py: Self-test for the MD5 hash function
#
# 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.Hash.MD5"""

from Crypto.Util.py3compat import *
from Crypto.Hash import MD5
from binascii import unhexlify
import unittest
from Crypto.SelfTest.st_common import list_test_cases


# This is a list of (expected_result, input[, description]) tuples.
test_data = [
    # Test vectors from RFC 1321
    ('d41d8cd98f00b204e9800998ecf8427e', '', "'' (empty string)"),
    ('0cc175b9c0f1b6a831c399e269772661', 'a'),
    ('900150983cd24fb0d6963f7d28e17f72', 'abc'),
    ('f96b697d7cb7938d525a2f31aaf161d0', 'message digest'),

    ('c3fcd3d76192e4007dfb496cca67e13b', 'abcdefghijklmnopqrstuvwxyz',
        'a-z'),

    ('d174ab98d277d9f5a5611c2c9f419d9f',
        'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789',
        'A-Z, a-z, 0-9'),

    ('57edf4a22be3c955ac49da2e2107b67a',
        '1234567890123456789012345678901234567890123456'
        + '7890123456789012345678901234567890',
        "'1234567890' * 8"),

    # https://www.cosic.esat.kuleuven.be/nessie/testvectors/hash/md5/Md5-128.unverified.test-vectors
    ('57EDF4A22BE3C955AC49DA2E2107B67A', '1234567890' * 8, 'Set 1, vector #7'),
    ('7707D6AE4E027C70EEA2A935C2296F21', 'a'*1000000, 'Set 1, vector #8'),
]


class Md5IterTest(unittest.TestCase):

    def runTest(self):
        message = b("\x00") * 16
        result1 = "4AE71336E44BF9BF79D2752E234818A5".lower()
        result2 = "1A83F51285E4D89403D00C46EF8508FE".lower()

        h = MD5.new(message)
        message = h.digest()
        self.assertEqual(h.hexdigest(), result1)

        for _ in range(99999):
            h = MD5.new(message)
            message = h.digest()

        self.assertEqual(h.hexdigest(), result2)


def get_tests(config={}):
    from .common import make_hash_tests

    tests =  make_hash_tests(MD5, "MD5", test_data,
                            digest_size=16,
                            oid="1.2.840.113549.2.5")
    if config.get('slow_tests'):
        tests += [ Md5IterTest() ]
    return tests


if __name__ == '__main__':
    import unittest
    suite = lambda: unittest.TestSuite(get_tests())
    unittest.main(defaultTest='suite')

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