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#!/usr/bin/env python
"""Unit tests for M2Crypto.AuthCookie.
Copyright (c) 1999-2002 Ng Pheng Siong. All rights reserved."""
import logging
import time
from M2Crypto import EVP, Rand, util
from M2Crypto.AuthCookie import (
AuthCookie,
AuthCookieJar,
mix,
unmix,
unmix3,
)
from http.cookies import (
SimpleCookie,
) # pylint: disable=no-name-in-module,import-error
from tests import unittest
log = logging.getLogger(__name__)
class AuthCookieTestCase(unittest.TestCase):
_format = 'Set-Cookie: _M2AUTH_="exp=%f&data=%s&digest=%s"'
_token = "_M2AUTH_"
def setUp(self):
self.data = "cogitoergosum"
self.exp = time.time() + 3600
self.jar = AuthCookieJar()
def tearDown(self):
pass
def _corrupt_part_str(self, s: str, fr: int, to: int) -> str:
out = s[:fr] + "".join([chr(ord(x) + 13) for x in s[fr:to]]) + s[to:]
self.assertNotEqual(s, out)
return out
def test_encode_part_str(self):
a_str = "a1b2c3d4e5f6h7i8j9"
self.assertEqual(self._corrupt_part_str(a_str, 3, 5), "a1b?p3d4e5f6h7i8j9")
def test_mix_unmix(self):
dough = mix(self.exp, self.data)
exp, data = unmix(dough)
self.assertEqual(data, self.data)
# we are comparing seconds here, ten-thousandth
# second should be enough.
self.assertAlmostEqual(exp, self.exp, places=4)
def test_make_cookie(self):
c = self.jar.makeCookie(self.exp, self.data)
self.assertTrue(isinstance(c, AuthCookie))
self.assertEqual(c.expiry(), self.exp)
self.assertEqual(c.data(), self.data)
# Peek inside the cookie jar...
key = self.jar._key # pylint: disable=protected-access
mac = util.bin_to_hex(
EVP.hmac(key, mix(self.exp, self.data).encode(), "sha256")
)
self.assertEqual(c.mac(), mac)
# Ok, stop peeking now.
cookie_str = self._format % (self.exp, self.data, mac)
self.assertEqual(c.output(), cookie_str)
def test_make_cookie_invalid(self):
with self.assertRaises(ValueError):
self.jar.makeCookie("complete nonsense", self.data)
def test_expired(self):
t = self.exp - 7200
c = self.jar.makeCookie(t, self.data)
self.assertTrue(c.isExpired())
def test_not_expired(self):
c = self.jar.makeCookie(self.exp, self.data)
self.assertFalse(c.isExpired())
def test_is_valid(self):
c = self.jar.makeCookie(self.exp, self.data)
self.assertTrue(self.jar.isGoodCookie(c))
def test_is_invalid_expired(self):
t = self.exp - 7200
c = self.jar.makeCookie(t, self.data)
self.assertFalse(self.jar.isGoodCookie(c))
def test_is_invalid_changed_exp(self):
c = self.jar.makeCookie(self.exp, self.data)
c._expiry = 0 # pylint: disable=protected-access
self.assertFalse(self.jar.isGoodCookie(c))
def test_is_invalid_changed_data(self):
c = self.jar.makeCookie(self.exp, self.data)
c._data = "this is bad" # pylint: disable=protected-access
self.assertFalse(self.jar.isGoodCookie(c))
def test_is_invalid_changed_mac(self):
c = self.jar.makeCookie(self.exp, self.data)
c._mac = "this is bad" # pylint: disable=protected-access
self.assertFalse(self.jar.isGoodCookie(c))
def test_mix_unmix3(self):
c = self.jar.makeCookie(self.exp, self.data)
s = SimpleCookie()
s.load(c.output(header=""))
exp, data, digest = unmix3(s[self._token].value)
self.assertEqual(data, self.data)
# see comment in test_mix_unmix
self.assertAlmostEqual(exp, self.exp, places=4)
key = self.jar._key # pylint: disable=protected-access
mac = util.bin_to_hex(
EVP.hmac(key, mix(self.exp, self.data).encode(), "sha256")
)
self.assertEqual(digest, mac)
def test_cookie_str(self):
c = self.jar.makeCookie(self.exp, self.data)
self.assertTrue(self.jar.isGoodCookieString(c.output(header="")))
def test_cookie_str2(self):
c = self.jar.makeCookie(self.exp, self.data)
s = SimpleCookie()
s.load(c.output(header=""))
self.assertTrue(self.jar.isGoodCookieString(s.output(header="")))
def test_cookie_str_expired(self):
t = self.exp - 7200
c = self.jar.makeCookie(t, self.data)
s = SimpleCookie()
s.load(c.output(header=""))
self.assertFalse(self.jar.isGoodCookieString(s.output(header="")))
def test_cookie_str_arbitrary_change(self):
c = self.jar.makeCookie(self.exp, self.data)
cout = c.output(header="")
cout_str = cout[:20] + "this is bad" + cout[20:]
s = SimpleCookie()
s.load(cout_str)
self.assertFalse(self.jar.isGoodCookieString(s.output(header="")))
def test_cookie_str_changed_exp(self):
c = self.jar.makeCookie(self.exp, self.data)
cout = c.output(header="")
cout_str = self._corrupt_part_str(cout, 14, 16)
s = SimpleCookie()
s.load(cout_str)
self.assertFalse(self.jar.isGoodCookieString(s.output(header="")))
def test_cookie_str_changed_data(self):
c = self.jar.makeCookie(self.exp, self.data)
cout = c.output(header="")
cout_str = self._corrupt_part_str(cout, 24, 26)
s = SimpleCookie()
s.load(cout_str)
self.assertFalse(self.jar.isGoodCookieString(s.output(header="")))
def test_cookie_str_changed_mac(self):
c = self.jar.makeCookie(self.exp, self.data)
cout = c.output(header="")
cout_str = self._corrupt_part_str(cout, 64, 66)
s = SimpleCookie()
s.load(cout_str)
self.assertFalse(self.jar.isGoodCookieString(s.output(header="")))
def suite():
return unittest.TestLoader().loadTestsFromTestCase(AuthCookieTestCase)
if __name__ == "__main__":
Rand.load_file("randpool.dat", -1)
unittest.TextTestRunner().run(suite())
Rand.save_file("randpool.dat")
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