Scott Kitterman
97 lines
6.0 KiB
Python
97 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_signs_and_verifies(self):
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# A message verifies after being signed
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self.maxDiff = None
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sig_lines = dkim.arc_sign(
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self.message, b"test", b"example.com", self.key, b"lists.example.org", timestamp="12345")
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#expected_sig = [b'ARC-Seal: i=1; cv=none; a=rsa-sha256; d=example.com; s=test; t=12345;\r\n b=AwwfB+haHcusCH1o5kKebsCtsGWBa2sW1jJRHPNLRv8e5fuDl8VMYtj/r5LIZRgj+2ubPc\r\n hjLhoj6/Nf3Sv5m3P6iW9nnXM/HV0CLFxD5RjLhNy0Wsi6POBHVQ2KTT85xv7AyBURBv00Np\r\n kgGt+v3g7wtDQ3T+MwquceXqPmRjM=\r\n', b'ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed;\r\n d=example.com; s=test; t=12345; h=message-id : date : from : to :\r\n subject : from; bh=wE7NXSkgnx9PGiavN4OZhJztvkqPDlemV3OGuEnLwNo=;\r\n b=a0f6qc3k9eECTSR155A0TQS+LjqPFWfI/brQBA83EUz00SNxj1wmWykvs1hhBVeM0r1kEQ\r\n c6CKbzRYaBNSiFj4q8JBpRIujLz1qLyGmPuAI6ddu/Z/1hQxgpVcp/odmI1UMV2R+d+yQ7tU\r\n p3EQxF/GYNt22rV4rNmDmANZVqJ90=\r\n', b'ARC-Authentication-Results: i=1; lists.example.org; arc=none;\r\n spf=pass smtp.mfrom=jqd@d1.example;\r\n dkim=pass (1024-bit key) header.i=@d1.example;\r\n dmarc=pass\r\n']
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expected_sig = [b'ARC-Seal: i=1; cv=none; a=rsa-sha256; d=example.com; s=test; t=12345;\r\n b=MBw2+L1/4PuYWJlt1tZlDtbOvyfbyH2t2N6DinFV/BIaB2LqbDKTYjXXk9HuuK1/qEkTd\r\n TxCYScIrtVO7pFbGiSawMuLatVzHNCqTURa1zBTXr2mKW1hgdmrtMMUcMVCYxr1AJpu6IYX\r\n VMIoOAn7tIDdO0VLokK6FnIXTWEAplQ=\r\n', b'ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed;\r\n d=example.com; s=test; t=12345; h=message-id : date : from : to :\r\n subject : from; bh=wE7NXSkgnx9PGiavN4OZhJztvkqPDlemV3OGuEnLwNo=;\r\n b=a0f6qc3k9eECTSR155A0TQS+LjqPFWfI/brQBA83EUz00SNxj1wmWykvs1hhBVeM0r1kE\r\n Qc6CKbzRYaBNSiFj4q8JBpRIujLz1qLyGmPuAI6ddu/Z/1hQxgpVcp/odmI1UMV2R+d+yQ7\r\n tUp3EQxF/GYNt22rV4rNmDmANZVqJ90=\r\n', b'ARC-Authentication-Results: i=1; lists.example.org; arc=none;\r\n spf=pass smtp.mfrom=jqd@d1.example;\r\n dkim=pass (1024-bit key) header.i=@d1.example;\r\n dmarc=pass\r\n']
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self.assertEqual(expected_sig, sig_lines)
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(cv, res, reason) = dkim.arc_verify(b''.join(sig_lines) + self.message, dnsfunc=self.dnsfunc)
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self.assertEqual(cv, dkim.CV_Pass)
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def test_fails_h_in_as(self):
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# ARC 4.1.3, h= not allowed in AS
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self.maxDiff = None
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sig_lines = [b'ARC-Seal: i=1; cv=none; a=rsa-sha256; d=example.com; s=test; t=12345;\r\n h=message-id : date : from : to : subject : from;\r\n b=mIurIuLl0/wAxWhA4DBS1wsUE15IBnmJ7o3sH15hIuesdD4smz1cCLXVhRtxQE\r\n rVtVLv4OgNCgdFsB5zbSOUao2bSSYP6y0BGyCWvr+hU4tai5axIc1Kfwbtv/0Mqg\r\n waiGJPreOAAeZOJ4vPfdaAbSXlN5MI4PHW89U82FSIBKI=\r\n', b'ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed;\r\n d=example.com; s=test; t=12345; h=message-id :\r\n date : from : to : subject : from;\r\n bh=wE7NXSkgnx9PGiavN4OZhJztvkqPDlemV3OGuEnLwNo=;\r\n b=a0f6qc3k9eECTSR155A0TQS+LjqPFWfI/brQBA83EUz00SNxj\r\n 1wmWykvs1hhBVeM0r1kEQc6CKbzRYaBNSiFj4q8JBpRIujLz1qL\r\n yGmPuAI6ddu/Z/1hQxgpVcp/odmI1UMV2R+d+yQ7tUp3EQxF/GY\r\n Nt22rV4rNmDmANZVqJ90=\r\n', b'ARC-Authentication-Results: i=1; lists.example.org; arc=none;\r\n spf=pass smtp.mfrom=jqd@d1.example;\r\n dkim=pass (1024-bit key) header.i=@d1.example;\r\n dmarc=pass\r\n']
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(cv, res, reason) = dkim.arc_verify(b''.join(sig_lines) + self.message, dnsfunc=self.dnsfunc)
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self.assertEqual(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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