]> granicus.if.org Git - apache/commitdiff
On the trunk:
authorStefan Eissing <icing@apache.org>
Thu, 14 Sep 2017 13:01:29 +0000 (13:01 +0000)
committerStefan Eissing <icing@apache.org>
Thu, 14 Sep 2017 13:01:29 +0000 (13:01 +0000)
mod_ssl: adding ssl_policies.h[.in] for policy cipher/protocol definitions. Use
     update_policies.py to update manually from Mozilla JSON definitions at
     https://statics.tls.security.mozilla.org/server-side-tls-conf.json

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1808335 13f79535-47bb-0310-9956-ffa450edef68

CHANGES
modules/ssl/mod_ssl.dsp
modules/ssl/ssl_engine_config.c
modules/ssl/ssl_policies.h [new file with mode: 0644]
modules/ssl/ssl_policies.h.in [new file with mode: 0644]
modules/ssl/update_policies.py [new file with mode: 0644]

diff --git a/CHANGES b/CHANGES
index bc3c4fe0190a6baf9935cd75907b75d853289c88..692116d936ed1c4b4cd5a3f18998733b711bcfdd 100644 (file)
--- a/CHANGES
+++ b/CHANGES
@@ -1,6 +1,11 @@
                                                          -*- coding: utf-8 -*-
 Changes with Apache 2.5.0
 
+  *) mod_ssl: adding ssl_policies.h[.in] for policy cipher/protocol definitions. Use 
+     update_policies.py to update manually from Mozilla JSON definitions at
+     https://statics.tls.security.mozilla.org/server-side-tls-conf.json
+     [Stefan Eissing]
+     
   *) mod_md: v0.9.5:
      - New directive (srly: what do you expect at this point?) "MDMustStaple on|off" to control if
        new certificates are requested with the OCSP Must Staple extension.
index 72af2936ceffecce2c66923be9a09d46f4373678..f7c9c2e0708d16cc5860e1956f0842df2d35fb56 100644 (file)
@@ -180,6 +180,10 @@ SOURCE=.\ssl_private.h
 # End Source File
 # Begin Source File
 
+SOURCE=.\ssl_policies.h
+# End Source File
+# Begin Source File
+
 SOURCE=.\ssl_util_ssl.h
 # End Source File
 # Begin Source File
index 48e09a630dcf92f8bb9cf5f4ad1b05071a4c840c..56dbc77ed46e0e75a2ccc653e2f1f453a3dfd280 100644 (file)
@@ -30,6 +30,7 @@
 #include <stdlib.h>
 
 #include "ssl_private.h"
+#include "ssl_policies.h"
 #include "util_mutex.h"
 #include "ap_provider.h"
 
@@ -521,70 +522,6 @@ void ssl_config_proxy_merge(apr_pool_t *p,
 **  _________________________________________________________________
 */
 
-#define SSL_MOD_POLICIES_KEY "ssl_module_policies"
-
-#ifndef OPENSSL_NO_SSL3
-#define STUPID_PROTOCOL_CONSTANTS_SSLV3      SSL_PROTOCOL_SSLV3
-#else
-#define STUPID_PROTOCOL_CONSTANTS_SSLV3      0
-#endif
-
-/**
- * Define a core set of policies that are always there:
- * - 'modern' from https://wiki.mozilla.org/Security/Server_Side_TLS
- * - 'intermediate' from https://wiki.mozilla.org/Security/Server_Side_TLS
- * - 'old' from https://wiki.mozilla.org/Security/Server_Side_TLS
- */
-#ifdef HAVE_TLSV1_X
-    /* Only with OpenSSL > v1.0.2 do we have a chance to implement modern */
-#define SSL_POLICY_LEGACY_PROTOCOLS  \
-    (STUPID_PROTOCOL_CONSTANTS_SSLV3|SSL_PROTOCOL_TLSV1|SSL_PROTOCOL_TLSV1_1)
-
-#define SSL_POLICY_MODERN_PROTOCOLS  \
-    (SSL_PROTOCOL_ALL & ~SSL_POLICY_LEGACY_PROTOCOLS)
-#define SSL_POLICY_MODERN_CIPHERS  \
-    "ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:" \
-    "ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:" \
-    "ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:" \
-    "ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA384:" \
-    "ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA256"
-#endif
-    
-#define SSL_POLICY_INTERMEDIATE_PROTOCOLS \
-    (SSL_PROTOCOL_ALL & ~STUPID_PROTOCOL_CONSTANTS_SSLV3)
-    
-#define SSL_POLICY_INTERMEDIATE_CIPHERS \
-    "ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:" \
-    "ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:" \
-    "ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:" \
-    "DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384:" \
-    "ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA:" \
-    "ECDHE-RSA-AES256-SHA384:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES256-SHA384:" \
-    "ECDHE-ECDSA-AES256-SHA:ECDHE-RSA-AES256-SHA:DHE-RSA-AES128-SHA256:" \
-    "DHE-RSA-AES128-SHA:DHE-RSA-AES256-SHA256:DHE-RSA-AES256-SHA:" \
-    "ECDHE-ECDSA-DES-CBC3-SHA:ECDHE-RSA-DES-CBC3-SHA:EDH-RSA-DES-CBC3-SHA:" \
-    "AES128-GCM-SHA256:AES256-GCM-SHA384:AES128-SHA256:AES256-SHA256:" \
-    "AES128-SHA:AES256-SHA:DES-CBC3-SHA:!DSS"
-
-#define SSL_POLICY_OLD_PROTOCOLS            (SSL_PROTOCOL_ALL)
-#define SSL_POLICY_OLD_CIPHERS \
-    "ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:" \
-    "ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:" \
-    "ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-GCM-SHA384:" \
-    "DHE-RSA-AES128-GCM-SHA256:DHE-DSS-AES128-GCM-SHA256:kEDH+AESGCM:" \
-    "ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA:" \
-    "ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA384:" \
-    "ECDHE-RSA-AES256-SHA:ECDHE-ECDSA-AES256-SHA:DHE-RSA-AES128-SHA256:" \
-    "DHE-RSA-AES128-SHA:DHE-DSS-AES128-SHA256:DHE-RSA-AES256-SHA256:" \
-    "DHE-DSS-AES256-SHA:DHE-RSA-AES256-SHA:ECDHE-RSA-DES-CBC3-SHA:" \
-    "ECDHE-ECDSA-DES-CBC3-SHA:EDH-RSA-DES-CBC3-SHA:AES128-GCM-SHA256:" \
-    "AES256-GCM-SHA384:AES128-SHA256:AES256-SHA256:AES128-SHA:AES256-SHA:AES:" \
-    "DES-CBC3-SHA:HIGH:SEED:!aNULL:!eNULL:!EXPORT:!DES:!RC4:!MD5:!PSK:!RSAPSK:" \
-    "!aDH:!aECDH:!EDH-DSS-DES-CBC3-SHA:!KRB5-DES-CBC3-SHA:!SRP"
-
-#define SSL_POLICY_PROXY_VERIFY_MODE    SSL_CVERIFY_REQUIRE
-#define SSL_POLICY_PROXY_VERIFY_DEPTH   -1
-
 static void add_policy(apr_hash_t *policies, apr_pool_t *p, const char *name,
                        int protocols, const char *ciphers, 
                        int honor_order, int compression, int session_tickets,
@@ -632,22 +569,36 @@ static apr_hash_t *get_policies(apr_pool_t *p, int create)
     if (create) {
         policies = apr_hash_make(p);
         
-        /* We could also invoke the commands here and let them parse strings. */
-#ifdef HAVE_TLSV1_X
+#if SSL_POLICY_MODERN
         add_policy(policies, p, "modern", 
-                   SSL_POLICY_MODERN_PROTOCOLS, SSL_POLICY_MODERN_CIPHERS, 
-                   1, 0, 0, 
-                   SSL_POLICY_PROXY_VERIFY_MODE, SSL_POLICY_PROXY_VERIFY_DEPTH);
+                   SSL_POLICY_MODERN_PROTOCOLS, 
+                   SSL_POLICY_MODERN_CIPHERS, 
+                   SSL_POLICY_HONOR_ORDER, 
+                   SSL_POLICY_COMPRESSION, 
+                   SSL_POLICY_SESSION_TICKETS, 
+                   SSL_POLICY_PROXY_VERIFY_MODE, 
+                   SSL_POLICY_PROXY_VERIFY_DEPTH);
 #endif        
+#if SSL_POLICY_INTERMEDIATE
         add_policy(policies, p, "intermediate", 
-                   SSL_POLICY_INTERMEDIATE_PROTOCOLS, SSL_POLICY_INTERMEDIATE_CIPHERS, 
-                   1, 0, 0, 
-                   SSL_POLICY_PROXY_VERIFY_MODE, SSL_POLICY_PROXY_VERIFY_DEPTH);
-                   
+                   SSL_POLICY_INTERMEDIATE_PROTOCOLS, 
+                   SSL_POLICY_INTERMEDIATE_CIPHERS, 
+                   SSL_POLICY_HONOR_ORDER, 
+                   SSL_POLICY_COMPRESSION, 
+                   SSL_POLICY_SESSION_TICKETS, 
+                   SSL_POLICY_PROXY_VERIFY_MODE, 
+                   SSL_POLICY_PROXY_VERIFY_DEPTH);
+#endif        
+#if SSL_POLICY_OLD
         add_policy(policies, p, "old", 
-                   SSL_POLICY_OLD_PROTOCOLS, SSL_POLICY_OLD_CIPHERS, 
-                   1, 0, 0, 
-                   SSL_CVERIFY_NONE, -1);
+                   SSL_POLICY_OLD_PROTOCOLS, 
+                   SSL_POLICY_OLD_CIPHERS, 
+                   SSL_POLICY_HONOR_ORDER, 
+                   SSL_POLICY_COMPRESSION, 
+                   SSL_POLICY_SESSION_TICKETS, 
+                   SSL_CVERIFY_NONE, 
+                   SSL_POLICY_PROXY_VERIFY_DEPTH);
+#endif        
         
         apr_pool_userdata_set(policies, SSL_MOD_POLICIES_KEY,
                               apr_pool_cleanup_null, p);
diff --git a/modules/ssl/ssl_policies.h b/modules/ssl/ssl_policies.h
new file mode 100644 (file)
index 0000000..474f799
--- /dev/null
@@ -0,0 +1,87 @@
+/* Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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.
+ */
+
+/**
+ * @verbatim
+                        _             _
+    _ __ ___   ___   __| |    ___ ___| |  mod_ssl
+   | '_ ` _ \ / _ \ / _` |   / __/ __| |  Apache Interface to OpenSSL
+   | | | | | | (_) | (_| |   \__ \__ \ |
+   |_| |_| |_|\___/ \__,_|___|___/___/_|
+                        |_____|
+   @endverbatim
+ * @file  ssl_policies.h
+ * @brief Additional Utility Functions for OpenSSL
+ *
+ * @defgroup MOD_SSL_UTIL Utilities
+ * @ingroup MOD_SSL
+ * @{
+ */
+
+#ifndef __SSL_POLICIES_H__
+#define __SSL_POLICIES_H__
+
+#define SSL_MOD_POLICIES_KEY "ssl_module_policies"
+
+#ifndef OPENSSL_NO_SSL3
+#define SSL_PROTOCOL_CONSTANTS_SSLV3        SSL_PROTOCOL_SSLV3
+#else
+#define SSL_PROTOCOL_CONSTANTS_SSLV3        0
+#endif
+
+#ifdef HAVE_TLSV1_X
+#define SSL_POLICY_LEGACY_PROTOCOLS  \
+    (SSL_PROTOCOL_CONSTANTS_SSLV3|SSL_PROTOCOL_TLSV1|SSL_PROTOCOL_TLSV1_1)
+#endif
+
+/* Settings for all policies */
+#define SSL_POLICY_HONOR_ORDER              1
+#define SSL_POLICY_COMPRESSION              0
+#define SSL_POLICY_SESSION_TICKETS          0
+#define SSL_POLICY_PROXY_VERIFY_MODE        SSL_CVERIFY_REQUIRE
+#define SSL_POLICY_PROXY_VERIFY_DEPTH       -1
+
+/**
+ * Define a core set of policies that are always there:
+ * - 'modern' from https://wiki.mozilla.org/Security/Server_Side_TLS
+ * - 'intermediate' from https://wiki.mozilla.org/Security/Server_Side_TLS
+ * - 'old' from https://wiki.mozilla.org/Security/Server_Side_TLS
+ * The JSON version can be retrieved here:
+ * https://statics.tls.security.mozilla.org/server-side-tls-conf.json
+ */
+
+#define SSL_POLICY_MOZILLA_VERSION 4.0
+
+#ifdef HAVE_TLS1_X
+#define SSL_POLICY_MODERN    1
+#define SSL_POLICY_MODERN_CIPHERS "ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA256"
+#define SSL_POLICY_MODERN_PROTOCOLS SSL_PROTOCOL_TLSV1_2
+#else /* ifdef HAVE_TLS1_X */
+#define SSL_POLICY_MODERN    0
+#endif /* ifdef HAVE_TLS1_X, else part */
+
+#define SSL_POLICY_INTERMEDIATE    1
+#define SSL_POLICY_INTERMEDIATE_CIPHERS "ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA:ECDHE-RSA-AES256-SHA:DHE-RSA-AES128-SHA256:DHE-RSA-AES128-SHA:DHE-RSA-AES256-SHA256:DHE-RSA-AES256-SHA:ECDHE-ECDSA-DES-CBC3-SHA:ECDHE-RSA-DES-CBC3-SHA:EDH-RSA-DES-CBC3-SHA:AES128-GCM-SHA256:AES256-GCM-SHA384:AES128-SHA256:AES256-SHA256:AES128-SHA:AES256-SHA:DES-CBC3-SHA:!DSS"
+#define SSL_POLICY_INTERMEDIATE_PROTOCOLS (SSL_PROTOCOL_ALL & ~(SSL_PROTOCOL_CONSTANTS_SSLV3))
+
+#define SSL_POLICY_OLD    1
+#define SSL_POLICY_OLD_CIPHERS "ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:DHE-DSS-AES128-GCM-SHA256:kEDH+AESGCM:ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA:ECDHE-ECDSA-AES256-SHA:DHE-RSA-AES128-SHA256:DHE-RSA-AES128-SHA:DHE-DSS-AES128-SHA256:DHE-RSA-AES256-SHA256:DHE-DSS-AES256-SHA:DHE-RSA-AES256-SHA:ECDHE-RSA-DES-CBC3-SHA:ECDHE-ECDSA-DES-CBC3-SHA:EDH-RSA-DES-CBC3-SHA:AES128-GCM-SHA256:AES256-GCM-SHA384:AES128-SHA256:AES256-SHA256:AES128-SHA:AES256-SHA:AES:DES-CBC3-SHA:HIGH:SEED:!aNULL:!eNULL:!EXPORT:!DES:!RC4:!MD5:!PSK:!RSAPSK:!aDH:!aECDH:!EDH-DSS-DES-CBC3-SHA:!KRB5-DES-CBC3-SHA:!SRP"
+#define SSL_POLICY_OLD_PROTOCOLS SSL_PROTOCOL_ALL
+
+
+#endif /* __SSL_POLICIES_H__ */
+/** @} */
+
diff --git a/modules/ssl/ssl_policies.h.in b/modules/ssl/ssl_policies.h.in
new file mode 100644 (file)
index 0000000..164053c
--- /dev/null
@@ -0,0 +1,70 @@
+/* Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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.
+ */
+
+/**
+ * @verbatim
+                        _             _
+    _ __ ___   ___   __| |    ___ ___| |  mod_ssl
+   | '_ ` _ \ / _ \ / _` |   / __/ __| |  Apache Interface to OpenSSL
+   | | | | | | (_) | (_| |   \__ \__ \ |
+   |_| |_| |_|\___/ \__,_|___|___/___/_|
+                        |_____|
+   @endverbatim
+ * @file  ssl_policies.h
+ * @brief Additional Utility Functions for OpenSSL
+ *
+ * @defgroup MOD_SSL_UTIL Utilities
+ * @ingroup MOD_SSL
+ * @{
+ */
+
+#ifndef __SSL_POLICIES_H__
+#define __SSL_POLICIES_H__
+
+#define SSL_MOD_POLICIES_KEY "ssl_module_policies"
+
+#ifndef OPENSSL_NO_SSL3
+#define SSL_PROTOCOL_CONSTANTS_SSLV3        SSL_PROTOCOL_SSLV3
+#else
+#define SSL_PROTOCOL_CONSTANTS_SSLV3        0
+#endif
+
+#ifdef HAVE_TLSV1_X
+#define SSL_POLICY_LEGACY_PROTOCOLS  \
+    (SSL_PROTOCOL_CONSTANTS_SSLV3|SSL_PROTOCOL_TLSV1|SSL_PROTOCOL_TLSV1_1)
+#endif
+
+/* Settings for all policies */
+#define SSL_POLICY_HONOR_ORDER              1
+#define SSL_POLICY_COMPRESSION              0
+#define SSL_POLICY_SESSION_TICKETS          0
+#define SSL_POLICY_PROXY_VERIFY_MODE        SSL_CVERIFY_REQUIRE
+#define SSL_POLICY_PROXY_VERIFY_DEPTH       -1
+
+/**
+ * Define a core set of policies that are always there:
+ * - 'modern' from https://wiki.mozilla.org/Security/Server_Side_TLS
+ * - 'intermediate' from https://wiki.mozilla.org/Security/Server_Side_TLS
+ * - 'old' from https://wiki.mozilla.org/Security/Server_Side_TLS
+ * The JSON version can be retrieved here:
+ * https://statics.tls.security.mozilla.org/server-side-tls-conf.json
+ */
+
+@MOZILLA_SECURITY_POLICIES@
+
+#endif /* __SSL_POLICIES_H__ */
+/** @} */
+
diff --git a/modules/ssl/update_policies.py b/modules/ssl/update_policies.py
new file mode 100644 (file)
index 0000000..785c652
--- /dev/null
@@ -0,0 +1,133 @@
+#!/usr/bin/env python
+
+import json
+import os
+import sys
+
+from httplib import HTTPSConnection
+
+# The location were Mozilla defines the *current* TLS Security in JSON format
+#
+MOZ_TLS_CONF_SERVER = "statics.tls.security.mozilla.org"
+MOZ_TLS_CONF_PATH   = "/server-side-tls-conf.json"
+MOZ_TLS_CONF_URL    = "https://%s%s" % (MOZ_TLS_CONF_SERVER, MOZ_TLS_CONF_PATH)
+
+# The version we already know. Accept nothing less.
+#
+MOZ_TLS_CONF_VERSION_MIN = 4.0
+
+# keys inside the JSON document
+#
+KEY_CONF         = 'configurations'
+KEY_HREF         = 'href'
+KEY_OSSL_CIPHERS = 'openssl_ciphersuites'
+KEY_TLS_VERSIONS = 'tls_versions'
+KEY_VERSION      = 'version'
+
+# TLS Versions we know how to handle
+#
+TLS_VERSIONS     = {
+    'TLSv1.2' : "SSL_PROTOCOL_TLSV1_2",
+    'TLSv1.1' : "SSL_PROTOCOL_TLSV1_1",
+    'TLSv1'   : "SSL_PROTOCOL_TLSV1",
+    'SSLv3'   : "SSL_PROTOCOL_CONSTANTS_SSLV3",
+}
+TLS_1_X_VERSIONS = [ 'TLSv1.2' ]
+
+# the Security configurations to extract
+POLICY_NAMES = [ 'modern', 'intermediate', 'old' ]
+
+
+def fail(msg):
+    sys.stderr.write(msg)
+    sys.exit(1)
+
+
+def proto_string(tls_version):
+    if tls_version in TLS_VERSIONS:
+        return TLS_VERSIONS[tls_version]
+    fail("Unknown TLS protocol '%s'" % tls_version)
+    
+
+def proto_conf(tls_versions):
+    if len(TLS_VERSIONS) < len(tls_versions):
+        fail("more TLS versions used than we know: %s" % tls_versions)
+    if len(tls_versions) == 1:
+        return proto_string(tls_versions[0])
+    missing = []
+    for tls in TLS_VERSIONS:
+        if not tls in tls_versions:
+            missing.append(proto_string(tls))
+    if len(missing):
+        return "(SSL_PROTOCOL_ALL & ~(%s))" % "|".join(missing)
+    return "SSL_PROTOCOL_ALL"
+
+
+# return an #ifdef required for a policy or None
+#
+def required_ifdef(conf):
+    for tlsv in conf[KEY_TLS_VERSIONS]:
+        # if it has a non-1_X protocol, it works without OpenSSL 1.0.2
+        if not tlsv in TLS_1_X_VERSIONS:
+            return None
+    return "HAVE_TLS1_X"
+    
+
+def getPolicyDef():
+    c = HTTPSConnection(MOZ_TLS_CONF_SERVER)
+    c.request('GET', MOZ_TLS_CONF_PATH)
+    data = c.getresponse().read()
+    c.close()
+    return data
+
+
+def printPolicies(doc):
+    print "#define SSL_POLICY_MOZILLA_VERSION %s" % doc[KEY_VERSION]
+    print ""
+    for pname in POLICY_NAMES:
+        prefix = "SSL_POLICY_%s" % pname.upper()
+        if not pname in doc[KEY_CONF]:
+            vars[prefix] = 0
+            continue
+        p = doc[KEY_CONF][pname]
+        
+        ifdef = required_ifdef(p)
+        if ifdef:
+            print "#ifdef %s" % ifdef
+            
+        print "#define %s    1" % prefix
+        print "#define %s_CIPHERS \"%s\"" % (prefix, p[KEY_OSSL_CIPHERS])
+        print "#define %s_PROTOCOLS %s" % (prefix, proto_conf(p[KEY_TLS_VERSIONS]))
+        
+        if ifdef:
+            print "#else /* ifdef %s */" % ifdef
+            print "#define %s    0" % prefix
+            print "#endif /* ifdef %s, else part */" % ifdef
+        print ""
+
+
+def main(argv):
+    data = getPolicyDef()
+    doc = json.loads(data)
+    
+    if MOZ_TLS_CONF_URL != doc[KEY_HREF]:
+        fail("ERROR: Unexpected href in policy document: %s\n" % doc[KEY_HREF])
+    if doc[KEY_VERSION] < MOZ_TLS_CONF_VERSION_MIN:
+        fail("ERROR: Expected at least version %s, but policy document has %s\n" \
+            % (MOZ_TLS_CONF_VERSION_MIN, doc[KEY_VERSION]))
+    
+    if 1 == len(argv):
+        printPolicies(doc)
+    elif 2 == len(argv):
+        with open(argv[1]) as f:
+            for line in f:
+                if line == "@MOZILLA_SECURITY_POLICIES@\n":
+                    printPolicies(doc)
+                else:
+                    sys.stdout.write(line)
+    else:
+        fail("usage: %s [file] \nDownload and print/replace the Mozilla TLS Security policies" % argv[0])
+    
+    
+if __name__ == "__main__":
+    main(sys.argv)