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# -*- coding: utf-8 -*-
import os
import sys
from Bcfg2.Compat import b64decode
from mock import Mock, MagicMock, patch
# add all parent testsuite directories to sys.path to allow (most)
# relative imports in python 2.4
path = os.path.dirname(__file__)
while path != "/":
if os.path.basename(path).lower().startswith("test"):
sys.path.append(path)
if os.path.basename(path) == "testsuite":
break
path = os.path.dirname(path)
from common import *
try:
from Bcfg2.Encryption import *
HAS_CRYPTO = True
except ImportError:
HAS_CRYPTO = False
if can_skip or HAS_CRYPTO:
class TestEncryption(Bcfg2TestCase):
plaintext = """foo bar
baz
ö
\t\tquux
""" + "a" * 16384 # 16K is completely arbitrary
iv = "0123456789ABCDEF"
salt = "01234567"
algo = "des_cbc"
@skipUnless(HAS_CRYPTO, "Encryption libraries not found")
def setUp(self):
pass
def test_str_crypt(self):
""" test str_encrypt/str_decrypt """
key = "a simple key"
# simple symmetrical test with no options
crypted = str_encrypt(self.plaintext, key)
self.assertEqual(self.plaintext, str_decrypt(crypted, key))
# symmetrical test with lots of options
crypted = str_encrypt(self.plaintext, key,
iv=self.iv, salt=self.salt,
algorithm=self.algo)
self.assertEqual(self.plaintext,
str_decrypt(crypted, key, iv=self.iv,
algorithm=self.algo))
# test that different algorithms are actually used
self.assertNotEqual(str_encrypt(self.plaintext, key),
str_encrypt(self.plaintext, key,
algorithm=self.algo))
# test that different keys are actually used
self.assertNotEqual(str_encrypt(self.plaintext, key),
str_encrypt(self.plaintext, "different key"))
# test that different IVs are actually used
self.assertNotEqual(str_encrypt(self.plaintext, key, iv=self.iv),
str_encrypt(self.plaintext, key))
# test that errors are raised on bad decrypts
crypted = str_encrypt(self.plaintext, key, algorithm=self.algo)
self.assertRaises(EVPError, str_decrypt,
crypted, "bogus key", algorithm=self.algo)
self.assertRaises(EVPError, str_decrypt,
crypted, key) # bogus algorithm
def test_ssl_crypt(self):
""" test ssl_encrypt/ssl_decrypt """
passwd = "a simple passphrase"
# simple symmetrical test
crypted = ssl_encrypt(self.plaintext, passwd)
self.assertEqual(self.plaintext, ssl_decrypt(crypted, passwd))
# more complex symmetrical test
crypted = ssl_encrypt(self.plaintext, passwd, algorithm=self.algo,
salt=self.salt)
self.assertEqual(self.plaintext,
ssl_decrypt(crypted, passwd, algorithm=self.algo))
# test that different algorithms are actually used
self.assertNotEqual(ssl_encrypt(self.plaintext, passwd),
ssl_encrypt(self.plaintext, passwd,
algorithm=self.algo))
# test that different passwords are actually used
self.assertNotEqual(ssl_encrypt(self.plaintext, passwd),
ssl_encrypt(self.plaintext, "different pass"))
# there's no reasonable test we can do to see if the
# output is base64-encoded, unfortunately, but if it's
# obviously not we fail
crypted = ssl_encrypt(self.plaintext, passwd)
self.assertRegexpMatches(crypted, r'^[A-Za-z0-9+/]+[=]{0,2}$')
# test that errors are raised on bad decrypts
crypted = ssl_encrypt(self.plaintext, passwd,
algorithm=self.algo)
self.assertRaises(EVPError, ssl_decrypt,
crypted, "bogus passwd", algorithm=self.algo)
self.assertRaises(EVPError, ssl_decrypt,
crypted, passwd) # bogus algorithm
def test_get_algorithm(self):
setup = Mock()
# we don't care what the default is, as long as there is
# one
setup.cfp.get.return_value = ALGORITHM
self.assertRegexpMatches(get_algorithm(setup),
r'^[a-z0-9]+_[a-z0-9_]+$')
setup.cfp.get.assert_called_with(CFG_SECTION, CFG_ALGORITHM,
default=ALGORITHM)
setup.cfp.get.return_value = self.algo
self.assertEqual(get_algorithm(setup), self.algo)
setup.cfp.get.assert_called_with(CFG_SECTION, CFG_ALGORITHM,
default=ALGORITHM)
# test that get_algorithm converts algorithms given in
# OpenSSL style to M2Crypto style
setup.cfp.get.return_value = "DES-EDE3-CFB8"
self.assertEqual(get_algorithm(setup), "des_ede3_cfb8")
setup.cfp.get.assert_called_with(CFG_SECTION, CFG_ALGORITHM,
default=ALGORITHM)
def test_get_passphrases(self):
setup = Mock()
setup.cfp.has_section.return_value = False
self.assertEqual(get_passphrases(setup), dict())
setup.cfp.has_section.return_value = True
setup.cfp.options.return_value = ["foo", "bar", CFG_ALGORITHM]
setup.cfp.get.return_value = "passphrase"
self.assertItemsEqual(get_passphrases(setup),
dict(foo="passphrase",
bar="passphrase"))
@patch("Bcfg2.Encryption.get_passphrases")
def test_bruteforce_decrypt(self, mock_passphrases):
passwd = "a simple passphrase"
crypted = ssl_encrypt(self.plaintext, passwd)
setup = Mock()
# test with no passphrases given nor in config
mock_passphrases.return_value = dict()
self.assertRaises(EVPError,
bruteforce_decrypt,
crypted, setup=setup)
mock_passphrases.assert_called_with(setup)
# test with good passphrase given in function call
mock_passphrases.reset_mock()
self.assertEqual(self.plaintext,
bruteforce_decrypt(crypted,
passphrases=["bogus pass",
passwd,
"also bogus"]))
self.assertFalse(mock_passphrases.called)
# test with no good passphrase given nor in config
mock_passphrases.reset_mock()
self.assertRaises(EVPError,
bruteforce_decrypt,
crypted, passphrases=["bogus", "also bogus"])
self.assertFalse(mock_passphrases.called)
# test with good passphrase in config file
mock_passphrases.reset_mock()
mock_passphrases.return_value = dict(bogus="bogus",
real=passwd,
bogus2="also bogus")
self.assertEqual(self.plaintext,
bruteforce_decrypt(crypted, setup=setup))
mock_passphrases.assert_called_with(setup)
# test that passphrases given in function call take
# precedence over config
mock_passphrases.reset_mock()
self.assertRaises(EVPError,
bruteforce_decrypt,
crypted, setup=setup,
passphrases=["bogus", "also bogus"])
self.assertFalse(mock_passphrases.called)
# test that different algorithms are used
mock_passphrases.reset_mock()
crypted = ssl_encrypt(self.plaintext, passwd, algorithm=self.algo)
self.assertEqual(self.plaintext,
bruteforce_decrypt(crypted, setup=setup,
algorithm=self.algo))
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