feat(model): add chacha draft to default ciphers

this allows older Android versions that implement the draft version of
the ChaCha20-Poly1305 cipher to use if over the much more expensive AES
ciphers.

Author: felixbuenemann

README.md

@@ -261,7 +261,7 @@ _Note that Kubernetes annotation maps are all of Go type `map[string]string`.  A
 | <a name="log-format"></a>deis-router | deployment | [router.deis.io/nginx.logFormat](#log-format) | `"[$time_iso8601] - $app_name - $remote_addr - $remote_user - $status - "$request" - $bytes_sent - "$http_referer" - "$http_user_agent" - "$server_name" - $upstream_addr - $http_host - $upstream_response_time - $request_time"` | Nginx access log format. **Warning:** if you change this to a non-default value, log parsing in monitoring subsystem will be broken. Use this parameter if you completely understand what you're doing. |
 | <a name="ssl-enforce"></a>deis-router | deployment | [router.deis.io/nginx.ssl.enforce](#ssl-enforce) | `"false"` | Whether to respond with a 301 for all HTTP requests with a permanent redirect to the HTTPS equivalent address. |
 | <a name="ssl-protocols"></a>deis-router | deployment | [router.deis.io/nginx.ssl.protocols](#ssl-protocols) | `"TLSv1 TLSv1.1 TLSv1.2"` | nginx `ssl_protocols` setting. |
-| <a name="ssl-ciphers"></a>deis-router | deployment | [router.deis.io/nginx.ssl.ciphers](#ssl-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"` | nginx `ssl_ciphers`.  The default ciphers are taken from the intermediate compatibility section in the [Mozilla Wiki on Security/Server Side TLS](https://wiki.mozilla.org/Security/Server_Side_TLS). If the value is set to the empty string, OpenSSL's default ciphers are used.  In _all_ cases, server side cipher preferences (order matters) are used. |
+| <a name="ssl-ciphers"></a>deis-router | deployment | [router.deis.io/nginx.ssl.ciphers](#ssl-ciphers) | `"ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-ECDSA-CHACHA20-POLY1305-OLD:ECDHE-RSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305-OLD: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"` | nginx `ssl_ciphers`.  The default ciphers are taken from the intermediate compatibility section in the [Mozilla Wiki on Security/Server Side TLS](https://wiki.mozilla.org/Security/Server_Side_TLS). If the value is set to the empty string, OpenSSL's default ciphers are used.  In _all_ cases, server side cipher preferences (order matters) are used. |
 | <a name="ssl-sessionCache"></a>deis-router | deployment | [router.deis.io/nginx.ssl.sessionCache](#ssl-sessionCache) | `""` | nginx `ssl_session_cache` setting. |
 | <a name="ssl-session-timeout"></a>deis-router | deployment | [router.deis.io/nginx.ssl.sessionTimeout](#ssl-session-timeout) | `"10m"` | nginx `ssl_session_timeout` expressed in units `ms`, `s`, `m`, `h`, `d`, `w`, `M`, or `y`. |
 | <a name="ssl-use-session-tickets"></a>deis-router | deployment | [router.deis.io/nginx.ssl.useSessionTickets](#ssl-use-session-tickets) | `"true"` | Whether to use [TLS session tickets](http://tools.ietf.org/html/rfc5077) for session resumption without server-side state. |

model/model.go

@@ -232,7 +232,7 @@ func newSSLConfig() *SSLConfig {
 		// Compatible: Firefox 1, Chrome 1, IE 7, Opera 5, Safari 1, Windows XP IE8, Android 2.3, Java 7
 		// Incompatible: Windows XP IE6, Java 6
 		// Source: https://wiki.mozilla.org/Security/Server_Side_TLS (intermediate compatibility)
-		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",
+		Ciphers:           "ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-ECDSA-CHACHA20-POLY1305-OLD:ECDHE-RSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305-OLD: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",
 		SessionTimeout:    "10m",
 		UseSessionTickets: true,
 		BufferSize:        "4k",