Basic fix for #411

letsencrypt/cli.py

@@ -1,7 +1,9 @@
 """Let's Encrypt CLI."""
 # TODO: Sanity check all input.  Be sure to avoid shell code etc...
+
 import argparse
 import atexit
+import configobj
 import functools
 import logging
 import logging.handlers
@@ -12,6 +14,7 @@ import time
 import traceback
 
 import configargparse
+import OpenSSL
 import zope.component
 import zope.interface.exceptions
 import zope.interface.verify
@@ -27,6 +30,7 @@ from letsencrypt import interfaces
 from letsencrypt import le_util
 from letsencrypt import log
 from letsencrypt import reporter
+from letsencrypt import storage
 
 from letsencrypt.display import util as display_util
 from letsencrypt.display import ops as display_ops
@@ -159,7 +163,8 @@ def _init_le_client(args, config, authenticator, installer):
     return client.Client(config, acc, authenticator, installer, acme=acme)
 
 
-def run(args, config, plugins):
+def run(args, config, plugins):  # pylint: disable=too-many-locals,too-many-branches,too-many-statements
+
     """Obtain a certificate and install."""
     if args.configurator is not None and (args.installer is not None or
                                           args.authenticator is not None):
@@ -181,15 +186,109 @@ def run(args, config, plugins):
         return "Configurator could not be determined"
 
     domains = _find_domains(args, installer)
+    domains_set = set(domains)
+    renew_config = configuration.RenewerConfiguration(config)
+    # I am not sure whether that correctly reads the systemwide
+    # configuration file.
+
+    configs_dir = renew_config.renewal_configs_dir
+    identical_names_cert = None
+    subset_names_cert = None
+
+    for renewal_file in os.listdir(configs_dir):
+        full_path = os.path.join(configs_dir, renewal_file)
+        rc_config = configobj.ConfigObj(renew_config.renewer_config_file)
+        rc_config.merge(configobj.ConfigObj(full_path))
+        rc_config.filename = full_path
+        cli_config = configuration.RenewerConfiguration(config.namespace)
+
+        candidate_lineage = storage.RenewableCert(rc_config, None, cli_config)
+        # TODO: Handle these differently depending on whether they are
+        #       expired or still valid?
+        candidate_names = set(candidate_lineage.names())
+        if candidate_names == domains_set:
+            identical_names_cert = (renewal_file, candidate_lineage)
+        elif candidate_names.issubset(domains_set):
+            subset_names_cert = (renewal_file, candidate_lineage,
+                                 candidate_lineage.names())
+    treat_as_renewal = False
+    question = None
+    same_cert_question = "You have an existing certificate that contains "
+    same_cert_question += "exactly the same domains you requested.\n\n{0}"
+    same_cert_question += "\n\nDo you want to renew and replace this "
+    same_cert_question += "certificate with a newly-issued one?"
+    subset_cert_question = "You have an existing certificate that contains "
+    subset_cert_question += "a portion of the domains you requested (ref: {0})"
+    subset_cert_question += "\n\nIt contains these names: {1}\n\nYou "
+    subset_cert_question += "requested these names for the new certificate: "
+    subset_cert_question += "{2}.\n\nDo you want to replace this existing "
+    subset_cert_question += "certificate with the new certificate?"
+
+    if identical_names_cert:
+        question = same_cert_question.format(identical_names_cert[0])
+    elif subset_names_cert:
+        question = subset_cert_question.format(subset_names_cert[0],
+                                               ", ".join(subset_names_cert[2]),
+                                               ", ".join(domains))
+    if question:
+        if zope.component.getUtility(interfaces.IDisplay).yesno(question,
+                                                                "Replace",
+                                                                "Cancel"):
+            treat_as_renewal = True
+        else:
+            # TODO: Once the --duplicate (?) option is implemented, this
+            #       exit will be suppressed and we will not treat this
+            #       as a renewal.  This should ideally be done by leaving
+            #       question as None above so that we don't even prompt
+            #       the user with the question.  (We might say "if question
+            #       and not duplicate_option:" instead of "if question".)
+            msg = "To obtain a new certificate that {0} an existing "
+            msg += "certificate in its domain-name coverage, consult the "
+            msg += "documentation about the --XXX-TODO option."
+            what = "duplicates" if identical_names_cert else "overlaps with"
+            msg = msg.format(what)
+            reporter_util = zope.component.getUtility(interfaces.IReporter)
+            reporter_util.add_message(msg, reporter_util.HIGH_PRIORITY, True)
+            sys.exit(1)
+
     # TODO: Handle errors from _init_le_client?
     le_client = _init_le_client(args, config, authenticator, installer)
-    lineage = le_client.obtain_and_enroll_certificate(
+    if treat_as_renewal:
-        domains, authenticator, installer, plugins)
+        # TREAT AS RENEWAL
-    if not lineage:
+        if identical_names_cert:
-        return "Certificate could not be obtained"
+            lineage = identical_names_cert[1]
+        else:
+            lineage = subset_names_cert[1]
+        # TODO: Use existing privkey instead of generating a new one
+        new_certr, new_chain, new_key, _ = le_client.obtain_certificate(domains)
+        # TODO: Check whether it worked!
+        old_version = lineage.latest_common_version()
+        lineage.save_successor(old_version,
+                               OpenSSL.crypto.dump_certificate(
+                                   OpenSSL.crypto.FILETYPE_PEM,
+                                   new_certr.body),
+                               new_key.pem,
+                               OpenSSL.crypto.dump_certificate(
+                                   OpenSSL.crypto.FILETYPE_PEM,
+                                   new_chain))
+        lineage.update_all_links_to(lineage.latest_common_version())
+        # TODO: Check return value of save_successor
+        # TODO: Also update lineage renewal config with any relevant
+        #       configuration values from this attempt?
+    else:
+        # TREAT AS NEW REQUEST
+        lineage = le_client.obtain_and_enroll_certificate(
+            domains, authenticator, installer, plugins)
+        if not lineage:
+            return "Certificate could not be obtained"
+    # TODO: This treats the key as changed even when it wasn't
     le_client.deploy_certificate(
         domains, lineage.privkey, lineage.cert, lineage.chain)
     le_client.enhance_config(domains, args.redirect)
+    if treat_as_renewal:
+        display_ops.success_renewal(domains)
+    else:
+        display_ops.success_installation(domains)
 
 
 def auth(args, config, plugins):

letsencrypt/client.py

@@ -378,8 +378,6 @@ class Client(object):
         # sites may have been enabled / final cleanup
         self.installer.restart()
 
-        display_ops.success_installation(domains)
-
     def enhance_config(self, domains, redirect=None):
         """Enhance the configuration.
 

letsencrypt/display/ops.py

@@ -233,6 +233,26 @@ def success_installation(domains):
         pause=False)
 
 
+def success_renewal(domains):
+    """Display a box confirming the renewal of an existing certificate.
+
+    .. todo:: This should be centered on the screen
+
+    :param list domains: domain names which were renewed
+
+    """
+    util(interfaces.IDisplay).notification(
+        "Your existing certificate has been successfully renewed, and the "
+        "new certificate has been installed.{1}{1}"
+        "The new certificate covers the following domains: {0}{1}{1}"
+        "You should test your configuration at:{1}{2}".format(
+            _gen_https_names(domains),
+            os.linesep,
+            os.linesep.join(_gen_ssl_lab_urls(domains))),
+        height=(14 + len(domains)),
+        pause=False)
+
+
 def _gen_ssl_lab_urls(domains):
     """Returns a list of urls.
 

letsencrypt/storage.py

@@ -11,6 +11,7 @@ import pytz
 import pyrfc3339
 
 from letsencrypt import constants
+from letsencrypt import crypto_util
 from letsencrypt import errors
 from letsencrypt import le_util
 
@@ -421,6 +422,24 @@ class RenewableCert(object):  # pylint: disable=too-many-instance-attributes
         """
         return self._notafterbefore(lambda x509: x509.get_notAfter(), version)
 
+    def names(self, version=None):
+        """What are the subject names of this certificate?
+
+        (If no version is specified, use the current version.)
+
+        :param int version: the desired version number
+        :returns: the subject names
+        :rtype: `list` of `str`
+
+        """
+        if version is None:
+            target = self.current_target("cert")
+        else:
+            target = self.version("cert", version)
+        with open(target) as f:
+            sans = crypto_util.get_sans_from_cert(f.read())
+        return sans
+
     def should_autodeploy(self):
         """Should this lineage now automatically deploy a newer version?
 

letsencrypt/tests/display/ops_test.py

@@ -383,5 +383,27 @@ class SuccessInstallationTest(unittest.TestCase):
             self.assertTrue(name in arg)
 
 
+class SuccessRenewalTest(unittest.TestCase):
+    # pylint: disable=too-few-public-methods
+    """Test the success renewal message."""
+    @classmethod
+    def _call(cls, names):
+        from letsencrypt.display.ops import success_renewal
+        success_renewal(names)
+
+    @mock.patch("letsencrypt.display.ops.util")
+    def test_success_renewal(self, mock_util):
+        mock_util().notification.return_value = None
+        names = ["example.com", "abc.com"]
+
+        self._call(names)
+
+        self.assertEqual(mock_util().notification.call_count, 1)
+        arg = mock_util().notification.call_args_list[0][0][0]
+
+        for name in names:
+            self.assertTrue(name in arg)
+
+
 if __name__ == "__main__":
     unittest.main()  # pragma: no cover

letsencrypt/tests/renewer_test.py

@@ -295,6 +295,26 @@ class RenewableCertTests(unittest.TestCase):
             else:
                 self.assertFalse(self.test_rc.has_pending_deployment())
 
+    def test_names(self):
+        # Trying the current version
+        test_cert = test_util.load_vector("cert-san.pem")
+        os.symlink(os.path.join("..", "..", "archive", "example.org",
+                                "cert12.pem"), self.test_rc.cert)
+        with open(self.test_rc.cert, "w") as f:
+            f.write(test_cert)
+        self.assertEqual(self.test_rc.names(),
+                         ["example.com", "www.example.com"])
+
+        # Trying a non-current version
+        test_cert = test_util.load_vector("cert.pem")
+        os.unlink(self.test_rc.cert)
+        os.symlink(os.path.join("..", "..", "archive", "example.org",
+                                "cert15.pem"), self.test_rc.cert)
+        with open(self.test_rc.cert, "w") as f:
+            f.write(test_cert)
+        self.assertEqual(self.test_rc.names(12),
+                         ["example.com", "www.example.com"])
+
     def _test_notafterbefore(self, function, timestamp):
         test_cert = test_util.load_vector("cert.pem")
         os.symlink(os.path.join("..", "..", "archive", "example.org",