mirror of
https://github.com/certbot/certbot.git
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Remove PoP
This commit is contained in:
Brad Warren
@@ -1,99 +0,0 @@
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"""Proof of Possession Identifier Validation Challenge."""
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import logging
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import os
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from cryptography import x509
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from cryptography.hazmat.backends import default_backend
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import zope.component
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from acme import challenges
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from acme import jose
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from acme import other
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from letsencrypt import interfaces
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from letsencrypt.display import util as display_util
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logger = logging.getLogger(__name__)
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class ProofOfPossession(object): # pylint: disable=too-few-public-methods
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"""Proof of Possession Identifier Validation Challenge.
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Based on draft-barnes-acme, section 6.5.
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:ivar installer: Installer object
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:type installer: :class:`~letsencrypt.interfaces.IInstaller`
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"""
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def __init__(self, installer):
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self.installer = installer
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def perform(self, achall):
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"""Perform the Proof of Possession Challenge.
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:param achall: Proof of Possession Challenge
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:type achall: :class:`letsencrypt.achallenges.ProofOfPossession`
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:returns: Response or None/False if the challenge cannot be completed
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:rtype: :class:`acme.challenges.ProofOfPossessionResponse`
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or False
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"""
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if (achall.alg in [jose.HS256, jose.HS384, jose.HS512] or
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not isinstance(achall.hints.jwk, achall.alg.kty)):
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return None
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for cert, key, _ in self.installer.get_all_certs_keys():
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with open(cert) as cert_file:
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cert_data = cert_file.read()
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try:
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cert_obj = x509.load_pem_x509_certificate(
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cert_data, default_backend())
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except ValueError:
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try:
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cert_obj = x509.load_der_x509_certificate(
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cert_data, default_backend())
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except ValueError:
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logger.warn("Certificate is neither PER nor DER: %s", cert)
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cert_key = achall.alg.kty(key=cert_obj.public_key())
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if cert_key == achall.hints.jwk:
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return self._gen_response(achall, key)
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# Is there are different prompt we should give the user?
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code, key = zope.component.getUtility(
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interfaces.IDisplay).input(
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"Path to private key for identifier: %s " % achall.domain)
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if code != display_util.CANCEL:
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return self._gen_response(achall, key)
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# If we get here, the key wasn't found
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return False
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def _gen_response(self, achall, key_path): # pylint: disable=no-self-use
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"""Create the response to the Proof of Possession Challenge.
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:param achall: Proof of Possession Challenge
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:type achall: :class:`letsencrypt.achallenges.ProofOfPossession`
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:param str key_path: Path to the key corresponding to the hinted to
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public key.
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:returns: Response or False if the challenge cannot be completed
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:rtype: :class:`acme.challenges.ProofOfPossessionResponse`
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or False
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"""
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if os.path.isfile(key_path):
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with open(key_path, 'rb') as key:
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try:
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# Needs to be changed if JWKES doesn't have a key attribute
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jwk = achall.alg.kty.load(key.read())
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sig = other.Signature.from_msg(achall.nonce, jwk.key,
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alg=achall.alg)
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except (IndexError, ValueError, TypeError, jose.errors.Error):
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return False
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return challenges.ProofOfPossessionResponse(nonce=achall.nonce,
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signature=sig)
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return False
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@@ -1,83 +0,0 @@
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"""Tests for letsencrypt.proof_of_possession."""
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import os
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import tempfile
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import unittest
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import mock
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from acme import challenges
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from acme import jose
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from acme import messages
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from letsencrypt import achallenges
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from letsencrypt import proof_of_possession
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from letsencrypt.display import util as display_util
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from letsencrypt.tests import test_util
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CERT0_PATH = test_util.vector_path("cert.der")
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CERT2_PATH = test_util.vector_path("dsa_cert.pem")
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CERT2_KEY_PATH = test_util.vector_path("dsa512_key.pem")
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CERT3_PATH = test_util.vector_path("matching_cert.pem")
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CERT3_KEY_PATH = test_util.vector_path("rsa512_key_2.pem")
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CERT3_KEY = test_util.load_rsa_private_key("rsa512_key_2.pem").public_key()
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class ProofOfPossessionTest(unittest.TestCase):
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def setUp(self):
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self.installer = mock.MagicMock()
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self.cert1_path = tempfile.mkstemp()[1]
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certs = [CERT0_PATH, self.cert1_path, CERT2_PATH, CERT3_PATH]
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keys = [None, None, CERT2_KEY_PATH, CERT3_KEY_PATH]
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self.installer.get_all_certs_keys.return_value = zip(
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certs, keys, 4 * [None])
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self.proof_of_pos = proof_of_possession.ProofOfPossession(
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self.installer)
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hints = challenges.ProofOfPossession.Hints(
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jwk=jose.JWKRSA(key=CERT3_KEY), cert_fingerprints=(),
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certs=(), serial_numbers=(), subject_key_identifiers=(),
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issuers=(), authorized_for=())
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chall = challenges.ProofOfPossession(
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alg=jose.RS256, nonce='zczv4HMLVe_0kimJ25Juig', hints=hints)
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challb = messages.ChallengeBody(
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chall=chall, uri="http://example", status=messages.STATUS_PENDING)
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self.achall = achallenges.ProofOfPossession(
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challb=challb, domain="example.com")
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def tearDown(self):
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os.remove(self.cert1_path)
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def test_perform_bad_challenge(self):
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hints = challenges.ProofOfPossession.Hints(
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jwk=jose.jwk.JWKOct(key="foo"), cert_fingerprints=(),
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certs=(), serial_numbers=(), subject_key_identifiers=(),
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issuers=(), authorized_for=())
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chall = challenges.ProofOfPossession(
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alg=jose.HS512, nonce='zczv4HMLVe_0kimJ25Juig', hints=hints)
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challb = messages.ChallengeBody(
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chall=chall, uri="http://example", status=messages.STATUS_PENDING)
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self.achall = achallenges.ProofOfPossession(
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challb=challb, domain="example.com")
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self.assertEqual(self.proof_of_pos.perform(self.achall), None)
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def test_perform_no_input(self):
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self.assertTrue(self.proof_of_pos.perform(self.achall).verify())
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@mock.patch("letsencrypt.proof_of_possession.zope.component.getUtility")
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def test_perform_with_input(self, mock_input):
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# Remove the matching certificate
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self.installer.get_all_certs_keys.return_value.pop()
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mock_input().input.side_effect = [(display_util.CANCEL, ""),
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(display_util.OK, CERT0_PATH),
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(display_util.OK, "imaginary_file"),
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(display_util.OK, CERT3_KEY_PATH)]
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self.assertFalse(self.proof_of_pos.perform(self.achall))
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self.assertFalse(self.proof_of_pos.perform(self.achall))
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self.assertFalse(self.proof_of_pos.perform(self.achall))
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self.assertTrue(self.proof_of_pos.perform(self.achall).verify())
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if __name__ == "__main__":
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unittest.main() # pragma: no cover
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