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152 lines
5.5 KiB
152 lines
5.5 KiB
#
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# SelfTest/Util/test_Padding.py: Self-test for padding functions
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#
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# ===================================================================
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#
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# Copyright (c) 2014, Legrandin <helderijs@gmail.com>
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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#
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in
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# the documentation and/or other materials provided with the
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# distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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# COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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# POSSIBILITY OF SUCH DAMAGE.
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# ===================================================================
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import unittest
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from binascii import unhexlify as uh
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from Crypto.Util.py3compat import *
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from Crypto.SelfTest.st_common import list_test_cases
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from Crypto.Util.Padding import pad, unpad
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class PKCS7_Tests(unittest.TestCase):
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def test1(self):
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padded = pad(b(""), 4)
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self.failUnless(padded == uh(b("04040404")))
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padded = pad(b(""), 4, 'pkcs7')
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self.failUnless(padded == uh(b("04040404")))
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back = unpad(padded, 4)
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self.failUnless(back == b(""))
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def test2(self):
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padded = pad(uh(b("12345678")), 4)
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self.failUnless(padded == uh(b("1234567804040404")))
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back = unpad(padded, 4)
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self.failUnless(back == uh(b("12345678")))
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def test3(self):
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padded = pad(uh(b("123456")), 4)
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self.failUnless(padded == uh(b("12345601")))
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back = unpad(padded, 4)
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self.failUnless(back == uh(b("123456")))
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def test4(self):
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padded = pad(uh(b("1234567890")), 4)
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self.failUnless(padded == uh(b("1234567890030303")))
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back = unpad(padded, 4)
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self.failUnless(back == uh(b("1234567890")))
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def testn1(self):
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self.assertRaises(ValueError, pad, uh(b("12")), 4, 'pkcs8')
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def testn2(self):
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self.assertRaises(ValueError, unpad, b("\0\0\0"), 4)
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def testn3(self):
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self.assertRaises(ValueError, unpad, b("123456\x02"), 4)
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self.assertRaises(ValueError, unpad, b("123456\x00"), 4)
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self.assertRaises(ValueError, unpad, b("123456\x05\x05\x05\x05\x05"), 4)
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class X923_Tests(unittest.TestCase):
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def test1(self):
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padded = pad(b(""), 4, 'x923')
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self.failUnless(padded == uh(b("00000004")))
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back = unpad(padded, 4, 'x923')
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self.failUnless(back == b(""))
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def test2(self):
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padded = pad(uh(b("12345678")), 4, 'x923')
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self.failUnless(padded == uh(b("1234567800000004")))
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back = unpad(padded, 4, 'x923')
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self.failUnless(back == uh(b("12345678")))
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def test3(self):
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padded = pad(uh(b("123456")), 4, 'x923')
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self.failUnless(padded == uh(b("12345601")))
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back = unpad(padded, 4, 'x923')
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self.failUnless(back == uh(b("123456")))
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def test4(self):
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padded = pad(uh(b("1234567890")), 4, 'x923')
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self.failUnless(padded == uh(b("1234567890000003")))
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back = unpad(padded, 4, 'x923')
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self.failUnless(back == uh(b("1234567890")))
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def testn1(self):
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self.assertRaises(ValueError, unpad, b("123456\x02"), 4, 'x923')
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self.assertRaises(ValueError, unpad, b("123456\x00"), 4, 'x923')
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self.assertRaises(ValueError, unpad, b("123456\x00\x00\x00\x00\x05"), 4, 'x923')
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class ISO7816_Tests(unittest.TestCase):
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def test1(self):
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padded = pad(b(""), 4, 'iso7816')
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self.failUnless(padded == uh(b("80000000")))
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back = unpad(padded, 4, 'iso7816')
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self.failUnless(back == b(""))
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def test2(self):
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padded = pad(uh(b("12345678")), 4, 'iso7816')
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self.failUnless(padded == uh(b("1234567880000000")))
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back = unpad(padded, 4, 'iso7816')
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self.failUnless(back == uh(b("12345678")))
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def test3(self):
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padded = pad(uh(b("123456")), 4, 'iso7816')
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self.failUnless(padded == uh(b("12345680")))
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#import pdb; pdb.set_trace()
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back = unpad(padded, 4, 'iso7816')
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self.failUnless(back == uh(b("123456")))
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def test4(self):
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padded = pad(uh(b("1234567890")), 4, 'iso7816')
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self.failUnless(padded == uh(b("1234567890800000")))
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back = unpad(padded, 4, 'iso7816')
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self.failUnless(back == uh(b("1234567890")))
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def testn1(self):
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self.assertRaises(ValueError, unpad, b("123456\x81"), 4, 'iso7816')
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def get_tests(config={}):
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tests = []
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tests += list_test_cases(PKCS7_Tests)
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tests += list_test_cases(X923_Tests)
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tests += list_test_cases(ISO7816_Tests)
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return tests
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if __name__ == '__main__':
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suite = lambda: unittest.TestSuite(get_tests())
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unittest.main(defaultTest='suite')
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