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import hmac
import sha
import unittest
from test import test_support
class TestVectorsTestCase(unittest.TestCase):
def test_md5_vectors(self):
# Test the HMAC module against test vectors from the RFC.
def md5test(key, data, digest):
h = hmac.HMAC(key, data)
self.assertEqual(h.hexdigest().upper(), digest.upper())
md5test(chr(0x0b) * 16,
"Hi There",
"9294727A3638BB1C13F48EF8158BFC9D")
md5test("Jefe",
"what do ya want for nothing?",
"750c783e6ab0b503eaa86e310a5db738")
md5test(chr(0xAA)*16,
chr(0xDD)*50,
"56be34521d144c88dbb8c733f0e8b3f6")
md5test("".join([chr(i) for i in range(1, 26)]),
chr(0xCD) * 50,
"697eaf0aca3a3aea3a75164746ffaa79")
md5test(chr(0x0C) * 16,
"Test With Truncation",
"56461ef2342edc00f9bab995690efd4c")
md5test(chr(0xAA) * 80,
"Test Using Larger Than Block-Size Key - Hash Key First",
"6b1ab7fe4bd7bf8f0b62e6ce61b9d0cd")
md5test(chr(0xAA) * 80,
("Test Using Larger Than Block-Size Key "
"and Larger Than One Block-Size Data"),
"6f630fad67cda0ee1fb1f562db3aa53e")
def test_sha_vectors(self):
def shatest(key, data, digest):
h = hmac.HMAC(key, data, digestmod=sha)
self.assertEqual(h.hexdigest().upper(), digest.upper())
shatest(chr(0x0b) * 20,
"Hi There",
"b617318655057264e28bc0b6fb378c8ef146be00")
shatest("Jefe",
"what do ya want for nothing?",
"effcdf6ae5eb2fa2d27416d5f184df9c259a7c79")
shatest(chr(0xAA)*20,
chr(0xDD)*50,
"125d7342b9ac11cd91a39af48aa17b4f63f175d3")
shatest("".join([chr(i) for i in range(1, 26)]),
chr(0xCD) * 50,
"4c9007f4026250c6bc8414f9bf50c86c2d7235da")
shatest(chr(0x0C) * 20,
"Test With Truncation",
"4c1a03424b55e07fe7f27be1d58bb9324a9a5a04")
shatest(chr(0xAA) * 80,
"Test Using Larger Than Block-Size Key - Hash Key First",
"aa4ae5e15272d00e95705637ce8a3b55ed402112")
shatest(chr(0xAA) * 80,
("Test Using Larger Than Block-Size Key "
"and Larger Than One Block-Size Data"),
"e8e99d0f45237d786d6bbaa7965c7808bbff1a91")
class ConstructorTestCase(unittest.TestCase):
def test_normal(self):
# Standard constructor call.
failed = 0
try:
h = hmac.HMAC("key")
except:
self.fail("Standard constructor call raised exception.")
def test_withtext(self):
# Constructor call with text.
try:
h = hmac.HMAC("key", "hash this!")
except:
self.fail("Constructor call with text argument raised exception.")
def test_withmodule(self):
# Constructor call with text and digest module.
import sha
try:
h = hmac.HMAC("key", "", sha)
except:
self.fail("Constructor call with sha module raised exception.")
class SanityTestCase(unittest.TestCase):
def test_default_is_md5(self):
# Testing if HMAC defaults to MD5 algorithm.
# NOTE: this whitebox test depends on the hmac class internals
import hashlib
h = hmac.HMAC("key")
self.failUnless(h.digest_cons == hashlib.md5)
def test_exercise_all_methods(self):
# Exercising all methods once.
# This must not raise any exceptions
try:
h = hmac.HMAC("my secret key")
h.update("compute the hash of this text!")
dig = h.digest()
dig = h.hexdigest()
h2 = h.copy()
except:
self.fail("Exception raised during normal usage of HMAC class.")
class CopyTestCase(unittest.TestCase):
def test_attributes(self):
# Testing if attributes are of same type.
h1 = hmac.HMAC("key")
h2 = h1.copy()
self.failUnless(h1.digest_cons == h2.digest_cons,
"digest constructors don't match.")
self.failUnless(type(h1.inner) == type(h2.inner),
"Types of inner don't match.")
self.failUnless(type(h1.outer) == type(h2.outer),
"Types of outer don't match.")
def test_realcopy(self):
# Testing if the copy method created a real copy.
h1 = hmac.HMAC("key")
h2 = h1.copy()
# Using id() in case somebody has overridden __cmp__.
self.failUnless(id(h1) != id(h2), "No real copy of the HMAC instance.")
self.failUnless(id(h1.inner) != id(h2.inner),
"No real copy of the attribute 'inner'.")
self.failUnless(id(h1.outer) != id(h2.outer),
"No real copy of the attribute 'outer'.")
def test_equality(self):
# Testing if the copy has the same digests.
h1 = hmac.HMAC("key")
h1.update("some random text")
h2 = h1.copy()
self.failUnless(h1.digest() == h2.digest(),
"Digest of copy doesn't match original digest.")
self.failUnless(h1.hexdigest() == h2.hexdigest(),
"Hexdigest of copy doesn't match original hexdigest.")
def test_main():
test_support.run_unittest(
TestVectorsTestCase,
ConstructorTestCase,
SanityTestCase,
CopyTestCase
)
if __name__ == "__main__":
test_main()
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