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