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#!/usr/bin/python2.4
#
# Copyright 2008 Google Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""
Testcases to test behavior of Keyczar Signers.
@author: arkajit.dey@gmail.com (Arkajit Dey)
"""
import os
import unittest
from keyczar import errors
from keyczar import keyczar
from keyczar import util
TEST_DATA = os.path.realpath(os.path.join(os.getcwd(), "..", "..", "testdata"))
class SignerTest(unittest.TestCase):
def setUp(self):
self.input = "This is some test data"
def __signInput(self, subdir):
signer = keyczar.Signer.Read(os.path.join(TEST_DATA, subdir))
sig = signer.Sign(self.input)
return (signer, sig)
def __unversionedSignInput(self, subdir):
unversioned_signer = keyczar.UnversionedSigner.Read(os.path.join(TEST_DATA, subdir))
sig = unversioned_signer.Sign(self.input)
return (unversioned_signer, sig)
def __readGoldenOutput(self, subdir, verifier=False, public=False):
path = os.path.join(TEST_DATA, subdir)
if verifier and not public:
czar = keyczar.Verifier.Read(path)
elif verifier and public:
czar = keyczar.Verifier.Read(os.path.join(TEST_DATA, subdir+".public"))
else:
czar = keyczar.Signer.Read(path)
active_sig = util.ReadFile(os.path.join(path, "1.out"))
primary_sig = util.ReadFile(os.path.join(path, "2.out"))
return (czar, active_sig, primary_sig)
def __testSignAndVerify(self, subdir):
(signer, sig) = self.__signInput(subdir)
self.assertTrue(signer.Verify(self.input, sig))
self.assertFalse(signer.Verify("Wrong string", sig))
def __testUnversionedSignAndVerify(self, subdir):
(unversioned_signer, sig) = self.__unversionedSignInput(subdir)
self.assertTrue(unversioned_signer.Verify(self.input, sig))
self.assertFalse(unversioned_signer.Verify("Wrong string", sig))
def __testSignerVerify(self, subdir):
(signer, active_sig, primary_sig) = self.__readGoldenOutput(subdir)
self.assertTrue(signer.Verify(self.input, active_sig))
self.assertTrue(signer.Verify(self.input, primary_sig))
def __testVerify(self, subdir):
(verifier, active_sig, primary_sig) = self.__readGoldenOutput(subdir, True)
self.assertTrue(verifier.Verify(self.input, active_sig))
self.assertTrue(verifier.Verify(self.input, primary_sig))
def __testPublicVerify(self, subdir):
(pubverifier, active_sig, primary_sig) = self.__readGoldenOutput(subdir,
True, True)
self.assertTrue(pubverifier.Verify(self.input, active_sig))
self.assertTrue(pubverifier.Verify(self.input, primary_sig))
def __testBadVerify(self, subdir):
(signer, active_sig, primary_sig) = self.__readGoldenOutput(subdir)
self.assertFalse(signer.Verify("Wrong string", active_sig))
self.assertFalse(signer.Verify("Wrong string", primary_sig))
self.assertFalse(signer.Verify(self.input, primary_sig[:-4]+"Junk"))
def testHmacSignAndVerify(self):
self.__testSignAndVerify("hmac")
def testHmacUnversionedSignAndVerify(self):
self.__testUnversionedSignAndVerify("hmac")
def testHmacVerify(self):
self.__testSignerVerify("hmac")
def testBadHmacVerify(self):
self.__testBadVerify("hmac")
def testDsaSignAndVerify(self):
self.__testSignAndVerify("dsa")
def testDsaUnversionedSignAndVerify(self):
self.__testUnversionedSignAndVerify("dsa")
def testDsaSignerVerify(self):
self.__testSignerVerify("dsa")
def testDsaVerify(self):
self.__testVerify("dsa")
def testDsaPublicVerify(self):
self.__testPublicVerify("dsa")
def testBadDsaVerify(self):
self.__testBadVerify("dsa")
def testRsaSignAndVerify(self):
self.__testSignAndVerify("rsa-sign")
def testRsaUnversionedSignAndVerify(self):
self.__testUnversionedSignAndVerify("rsa-sign")
def testRsaSignerVerify(self):
self.__testSignerVerify("rsa-sign")
def testRsaVerify(self):
self.__testVerify("rsa-sign")
def testRsaPublicVerify(self):
self.__testPublicVerify("rsa-sign")
def testBadRsaVerify(self):
self.__testBadVerify("rsa-sign")
def testHmacBadSigs(self):
(signer, sig) = self.__signInput("hmac")
sig_bytes = util.Decode(sig)
self.assertRaises(errors.ShortSignatureError, signer.Verify,
self.input, "AB")
bad_sig = util.Encode(chr(23) + sig_bytes[1:])
self.assertRaises(errors.BadVersionError, signer.Verify,
self.input, bad_sig)
char = chr(ord(sig_bytes[1]) ^ 45) # Munge key hash info in sig
bad_sig = util.Encode(sig_bytes[0] + char + sig_bytes[2:])
self.assertRaises(errors.KeyNotFoundError, signer.Verify,
self.input, bad_sig)
def tearDown(self):
self.input = None
def suite():
return unittest.makeSuite(SignerTest, 'test')
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