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# -*- coding: utf-8 -*-
#
# SelfTest/Hash/SHA256.py: Self-test for the SHA-256 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.SHA256"""
__revision__ = "$Id$"
import unittest
class LargeSHA256Test(unittest.TestCase):
def runTest(self):
"""SHA256: 512/520 MiB test"""
from Crypto.Hash import SHA256
zeros = '\0' * (1024*1024)
h = SHA256.new(zeros)
for i in xrange(511):
h.update(zeros)
# This test vector is from PyCrypto's old testdata.py file.
self.assertEqual('9acca8e8c22201155389f65abbf6bc9723edc7384ead80503839f49dcc56d767', h.hexdigest()) # 512 MiB
for i in xrange(8):
h.update(zeros)
# This test vector is from PyCrypto's old testdata.py file.
self.assertEqual('abf51ad954b246009dfe5a50ecd582fd5b8f1b8b27f30393853c3ef721e7fa6e', h.hexdigest()) # 520 MiB
def get_tests(config={}):
# Test vectors from FIPS PUB 180-2
# This is a list of (expected_result, input[, description]) tuples.
test_data = [
# FIPS PUB 180-2, B.1 - "One-Block Message"
('ba7816bf8f01cfea414140de5dae2223b00361a396177a9cb410ff61f20015ad',
'abc'),
# FIPS PUB 180-2, B.2 - "Multi-Block Message"
('248d6a61d20638b8e5c026930c3e6039a33ce45964ff2167f6ecedd419db06c1',
'abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq'),
# FIPS PUB 180-2, B.3 - "Long Message"
('cdc76e5c9914fb9281a1c7e284d73e67f1809a48a497200e046d39ccc7112cd0',
'a' * 10**6,
'"a" * 10**6'),
# Test for an old PyCrypto bug.
('f7fd017a3c721ce7ff03f3552c0813adcc48b7f33f07e5e2ba71e23ea393d103',
'This message is precisely 55 bytes long, to test a bug.',
'Length = 55 (mod 64)'),
]
from Crypto.Hash import SHA256
from common import make_hash_tests
tests = make_hash_tests(SHA256, "SHA256", test_data)
if config.get('slow_tests'):
tests += [LargeSHA256Test()]
return tests
if __name__ == '__main__':
import unittest
suite = lambda: unittest.TestSuite(get_tests())
unittest.main(defaultTest='suite')
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