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import hmac
import unittest
from test import test_support
class TestVectorsTestCase(unittest.TestCase):
def test_vectors(self):
"""Test the HMAC module against test vectors from the RFC."""
def md5test(key, data, digest):
h = hmac.HMAC(key, data)
self.failUnless(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")
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."""
import md5
h = hmac.HMAC("key")
self.failUnless(h.digestmod == 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.digestmod == h2.digestmod,
"Modules 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)
test_support.run_unittest(ConstructorTestCase)
test_support.run_unittest(SanityTestCase)
test_support.run_unittest(CopyTestCase)
if __name__ == "__main__":
test_main()
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