Scott Kitterman
147 lines
6.0 KiB
Python
147 lines
6.0 KiB
Python
# This software is provided 'as-is', without any express or implied
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# warranty. In no event will the author be held liable for any damages
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# arising from the use of this software.
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#
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# Permission is granted to anyone to use this software for any purpose,
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# including commercial applications, and to alter it and redistribute it
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# freely, subject to the following restrictions:
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#
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# 1. The origin of this software must not be misrepresented; you must not
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# claim that you wrote the original software. If you use this software
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# in a product, an acknowledgment in the product documentation would be
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# appreciated but is not required.
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# 2. Altered source versions must be plainly marked as such, and must not be
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# misrepresented as being the original software.
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# 3. This notice may not be removed or altered from any source distribution.
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#
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# Copyright (c) 2011 William Grant <me@williamgrant.id.au>
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#
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# This has been modified from the original software.
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# Copyright (c) 2016 Google, Inc.
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# Contact: Brandon Long <blong@google.com>
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import os.path
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import unittest
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import time
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import dkim
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def read_test_data(filename):
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"""Get the content of the given test data file.
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"""
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path = os.path.join(os.path.dirname(__file__), 'data', filename)
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with open(path, 'rb') as f:
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return f.read()
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class TestSignAndVerify(unittest.TestCase):
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"""End-to-end signature and verification tests."""
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def setUp(self):
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self.message = read_test_data("test.message")
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self.key = read_test_data("test.private")
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def dnsfunc(self, domain):
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sample_dns = """\
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k=rsa; \
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p=MFwwDQYJKoZIhvcNAQEBBQADSwAwSAJBANmBe10IgY+u7h3enWTukkqtUD5PR52T\
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b/mPfjC0QJTocVBq6Za/PlzfV+Py92VaCak19F4WrbVTK5Gg5tW220MCAwEAAQ=="""
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_dns_responses = {
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'example._domainkey.canonical.com.': sample_dns,
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'test._domainkey.example.com.': read_test_data("test.txt"),
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# dnsfunc returns empty if no txt record
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'missing._domainkey.example.com.': '',
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'20120113._domainkey.gmail.com.': """k=rsa; \
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p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA1Kd87/UeJjenpabgbFwh\
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+eBCsSTrqmwIYYvywlbhbqoo2DymndFkbjOVIPIldNs/m40KF+yzMn1skyoxcTUGCQ\
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s8g3FgD2Ap3ZB5DekAo5wMmk4wimDO+U8QzI3SD07y2+07wlNWwIt8svnxgdxGkVbb\
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hzY8i+RQ9DpSVpPbF7ykQxtKXkv/ahW3KjViiAH+ghvvIhkx4xYSIc9oSwVmAl5Oct\
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MEeWUwg8Istjqz8BZeTWbf41fbNhte7Y+YqZOwq1Sd0DbvYAD9NOZK9vlfuac0598H\
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Y+vtSBczUiKERHv1yRbcaQtZFh5wtiRrN04BLUTD21MycBX5jYchHjPY/wIDAQAB"""
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}
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try:
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domain = domain.decode('ascii')
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except UnicodeDecodeError:
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return None
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self.assertTrue(domain in _dns_responses,domain)
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return _dns_responses[domain]
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def test_verifies(self):
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# A message verifies after being signed.
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sig_lines = dkim.arc_sign(
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self.message, b"test", b"example.com", self.key,
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"test.domain: none", dkim.CV_None)
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(cv, res, reason) = dkim.arc_verify(b''.join(sig_lines) + self.message, dnsfunc=self.dnsfunc)
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self.assertEquals(cv, dkim.CV_Pass)
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"""def test_multiple_instances_verify(self):
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# A message verifies after being signed multiple times.
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message = self.message
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sig_lines = dkim.arc_sign(
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message, b"test", b"example.com", self.key,
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"test.domain: none", dkim.CV_None)
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message = ''.join(sig_lines) + message
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(cv, res, reason) = dkim.arc_verify(message, dnsfunc=self.dnsfunc)
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self.assertEquals(cv, dkim.CV_Pass)
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for x in range(10):
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sig_lines = dkim.arc_sign(
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message, b"test", b"example.com", self.key,
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"test.domain: arc=pass", dkim.CV_Pass)
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message = ''.join(sig_lines) + message
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(cv, res, reason) = dkim.arc_verify(message, dnsfunc=self.dnsfunc)
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self.assertEquals(cv, dkim.CV_Pass)
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def test_multiple_instances_verify_fail(self):
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# A message return CV_Fail if signed as failure.
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message = self.message
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sig_lines = dkim.arc_sign(
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message, b"test", b"example.com", self.key,
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"test.domain: none", dkim.CV_None)
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message = ''.join(sig_lines) + message
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(cv, res, reason) = dkim.arc_verify(message, dnsfunc=self.dnsfunc)
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self.assertEquals(cv, dkim.CV_Pass)
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sig_lines = dkim.arc_sign(
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message, b"test", b"example.com", self.key,
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"test.domain: arc=pass", dkim.CV_Fail)
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message = ''.join(sig_lines) + message
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# A conforming signer wouldn't sign as pass after a fail.
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sig_lines = dkim.arc_sign(
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message, b"test", b"example.com", self.key,
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"test.domain: arc=pass", dkim.CV_Pass)
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message = ''.join(sig_lines) + message
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(cv, res, reason) = dkim.arc_verify(message, dnsfunc=self.dnsfunc)
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self.assertEquals(cv, dkim.CV_Fail)
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def test_altered_body_fails(self):
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# An altered body fails verification.
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sig_lines = dkim.arc_sign(
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self.message, b"test", b"example.com", self.key,
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"test.domain: none", dkim.CV_None)
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(cv, res, reason) = dkim.arc_verify(''.join(sig_lines) + self.message + b"foo", dnsfunc=self.dnsfunc)
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self.assertEquals(cv, dkim.CV_Fail)
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def test_dns_pk_mismatch_fails(self):
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# DNS public key doesn't match signing private key.
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sig_lines = dkim.arc_sign(
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self.message, b"example", b"canonical.com", self.key,
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"test.domain: none", dkim.CV_None)
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(cv, res, reason) = dkim.arc_verify(''.join(sig_lines) + self.message, dnsfunc=self.dnsfunc)
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self.assertEquals(cv, dkim.CV_Fail)
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def test_dns_missing_fails(self):
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# DNS public key missing fails verify
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sig_lines = dkim.arc_sign(
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self.message, b"missing", b"example.com", self.key,
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"test.domain: none", dkim.CV_None)
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(cv, res, reason) = dkim.arc_verify(''.join(sig_lines) + self.message, dnsfunc=self.dnsfunc)
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self.assertEquals(cv, dkim.CV_Fail)"""
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def test_suite():
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from unittest import TestLoader
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return TestLoader().loadTestsFromName(__name__)
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