Merge branch 'server2server_tls' into develop

2 files changed, 23 insertions, 160 deletions

diff --git a/synapse/crypto/config.py b/synapse/crypto/config.py
deleted file mode 100644
index 2330133e71..0000000000
--- a/synapse/crypto/config.py
+++ /dev/null
@@ -1,160 +0,0 @@
-# -*- coding: utf-8 -*-
-# Copyright 2014 matrix.org
-#
-# 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.
-
-
-import ConfigParser as configparser
-import argparse
-import socket
-import sys
-import os
-from OpenSSL import crypto
-import nacl.signing
-from syutil.base64util import encode_base64
-import subprocess
-
-
-def load_config(description, argv):
-    config_parser = argparse.ArgumentParser(add_help=False)
-    config_parser.add_argument("-c", "--config-path", metavar="CONFIG_FILE",
-                               help="Specify config file")
-    config_args, remaining_args = config_parser.parse_known_args(argv)
-    if config_args.config_path:
-        config = configparser.SafeConfigParser()
-        config.read([config_args.config_path])
-        defaults = dict(config.items("KeyServer"))
-    else:
-        defaults = {}
-    parser = argparse.ArgumentParser(
-        parents=[config_parser],
-        description=description,
-        formatter_class=argparse.RawDescriptionHelpFormatter,
-    )
-    parser.set_defaults(**defaults)
-    parser.add_argument("--server-name", default=socket.getfqdn(),
-                        help="The name of the server")
-    parser.add_argument("--signing-key-path",
-                        help="The signing key to sign responses with")
-    parser.add_argument("--tls-certificate-path",
-                        help="PEM encoded X509 certificate for TLS")
-    parser.add_argument("--tls-private-key-path",
-                        help="PEM encoded private key for TLS")
-    parser.add_argument("--tls-dh-params-path",
-                        help="PEM encoded dh parameters for ephemeral keys")
-    parser.add_argument("--bind-port", type=int,
-                        help="TCP port to listen on")
-    parser.add_argument("--bind-host", default="",
-                        help="Local interface to listen on")
-
-    args = parser.parse_args(remaining_args)
-
-    server_config = vars(args)
-    del server_config["config_path"]
-    return server_config
-
-
-def generate_config(argv):
-    parser = argparse.ArgumentParser()
-    parser.add_argument("-c", "--config-path", help="Specify config file",
-                        metavar="CONFIG_FILE", required=True)
-    parser.add_argument("--server-name", default=socket.getfqdn(),
-                        help="The name of the server")
-    parser.add_argument("--signing-key-path",
-                        help="The signing key to sign responses with")
-    parser.add_argument("--tls-certificate-path",
-                        help="PEM encoded X509 certificate for TLS")
-    parser.add_argument("--tls-private-key-path",
-                        help="PEM encoded private key for TLS")
-    parser.add_argument("--tls-dh-params-path",
-                        help="PEM encoded dh parameters for ephemeral keys")
-    parser.add_argument("--bind-port", type=int, required=True,
-                        help="TCP port to listen on")
-    parser.add_argument("--bind-host", default="",
-                        help="Local interface to listen on")
-
-    args = parser.parse_args(argv)
-
-    dir_name = os.path.dirname(args.config_path)
-    base_key_name = os.path.join(dir_name, args.server_name)
-
-    if args.signing_key_path is None:
-        args.signing_key_path = base_key_name + ".signing.key"
-
-    if args.tls_certificate_path is None:
-        args.tls_certificate_path = base_key_name + ".tls.crt"
-
-    if args.tls_private_key_path is None:
-        args.tls_private_key_path = base_key_name + ".tls.key"
-
-    if args.tls_dh_params_path is None:
-        args.tls_dh_params_path = base_key_name + ".tls.dh"
-
-    if not os.path.exists(args.signing_key_path):
-        with open(args.signing_key_path, "w") as signing_key_file:
-            key = nacl.signing.SigningKey.generate()
-            signing_key_file.write(encode_base64(key.encode()))
-
-    if not os.path.exists(args.tls_private_key_path):
-        with open(args.tls_private_key_path, "w") as private_key_file:
-            tls_private_key = crypto.PKey()
-            tls_private_key.generate_key(crypto.TYPE_RSA, 2048)
-            private_key_pem = crypto.dump_privatekey(
-                crypto.FILETYPE_PEM, tls_private_key
-            )
-            private_key_file.write(private_key_pem)
-    else:
-        with open(args.tls_private_key_path) as private_key_file:
-            private_key_pem = private_key_file.read()
-            tls_private_key = crypto.load_privatekey(
-                crypto.FILETYPE_PEM, private_key_pem
-            )
-
-    if not os.path.exists(args.tls_certificate_path):
-        with open(args.tls_certificate_path, "w") as certifcate_file:
-            cert = crypto.X509()
-            subject = cert.get_subject()
-            subject.CN = args.server_name
-
-            cert.set_serial_number(1000)
-            cert.gmtime_adj_notBefore(0)
-            cert.gmtime_adj_notAfter(10 * 365 * 24 * 60 * 60)
-            cert.set_issuer(cert.get_subject())
-            cert.set_pubkey(tls_private_key)
-
-            cert.sign(tls_private_key, 'sha256')
-
-            cert_pem = crypto.dump_certificate(crypto.FILETYPE_PEM, cert)
-
-            certifcate_file.write(cert_pem)
-
-    if not os.path.exists(args.tls_dh_params_path):
-        subprocess.check_call([
-            "openssl", "dhparam",
-            "-outform", "PEM",
-            "-out", args.tls_dh_params_path,
-            "2048"
-        ])
-
-    config = configparser.SafeConfigParser()
-    config.add_section("KeyServer")
-    for key, value in vars(args).items():
-        if key != "config_path":
-            config.set("KeyServer", key, str(value))
-
-    with open(args.config_path, "w") as config_file:
-        config.write(config_file)
-
-
-if __name__ == "__main__":
-    generate_config(sys.argv[1:])
diff --git a/synapse/crypto/context_factory.py b/synapse/crypto/context_factory.py
new file mode 100644
index 0000000000..fe58d65305
--- /dev/null
+++ b/synapse/crypto/context_factory.py
@@ -0,0 +1,23 @@
+from twisted.internet import reactor, ssl
+from OpenSSL import SSL
+
+
+class ServerContextFactory(ssl.ContextFactory):
+    """Factory for PyOpenSSL SSL contexts that are used to handle incoming
+    connections and to make connections to remote servers."""
+
+    def __init__(self, config):
+        self._context = SSL.Context(SSL.SSLv23_METHOD)
+        self.configure_context(self._context, config)
+
+    @staticmethod
+    def configure_context(context, config):
+        context.set_options(SSL.OP_NO_SSLv2 | SSL.OP_NO_SSLv3)
+        context.use_certificate(config.tls_certificate)
+        context.use_privatekey(config.tls_private_key)
+        context.load_tmp_dh(config.tls_dh_params_path)
+        context.set_cipher_list("!ADH:HIGH+kEDH:!AECDH:HIGH+kEECDH")
+
+    def getContext(self):
+        return self._context
+