Add http_hsts_enable (enabled by default with max-age=31536000) to Kore's configuration file.

If enabled Kore adds the HSTS header to every response.

- Additionally, fix some typos in the example configuration.
- Change default SSL cipher list again, no more RC4 and almost PFS for all browsers.

includes/http.h

@@ -17,6 +17,7 @@
 #ifndef __H_HTTP_H
 #define __H_HTTP_H
 
+#define HTTP_HSTS_ENABLE	31536000
 #define HTTP_HEADER_MAX_LEN	4096
 #define HTTP_POSTBODY_MAX_LEN	10240000
 #define HTTP_URI_LEN		2000
@@ -80,6 +81,7 @@ struct http_request {
 extern int		http_request_count;
 extern u_int16_t	http_header_max;
 extern u_int64_t	http_postbody_max;
+extern u_int64_t	http_hsts_enable;
 
 void		http_init(void);
 void		http_process(void);

includes/kore.h

@@ -46,7 +46,7 @@
 
 #define KORE_DOMAINNAME_LEN		254
 #define KORE_PIDFILE_DEFAULT		"/var/run/kore.pid"
-#define KORE_DEFAULT_CIPHER_LIST	"EECDH+AES:EDH+AES:-SHA1:EECDH+RC4:EDH+RC4:RC4-SHA:EECDH+AES256:EDH+AES256:AES256-SHA:!aNULL:!eNULL:!EXP:!LOW:!MD5"
+#define KORE_DEFAULT_CIPHER_LIST	"ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-GCM-SHA384: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-RSA-AES256-SHA256:DHE-DSS-AES256-SHA:AES128-GCM-SHA256:AES256-GCM-SHA384:HIGH:!aNULL:!eNULL:!EXPORT:!DES:!3DES:!MD5:!PSK"
 
 #if defined(KORE_DEBUG)
 #define kore_debug(fmt, ...)	\

modules/example/module.conf

@@ -4,7 +4,7 @@
 bind		127.0.0.1 443
 bind		::1 443
 
-# The path worker processes will chroot too after starting.
+# The path worker processes will chroot into after starting.
 chroot		/home/joris/src/kore
 
 # Worker processes will run as the specified user.
@@ -25,7 +25,7 @@ workers		4
 #onload myinit
 
 # You can define a callback Kore calls from its parent process or
-# workers everytime # the kore_cb_interval timer (in milliseconds) is reached.
+# workers everytime the kore_cb_interval timer (in milliseconds) is reached.
 #
 # NOTE: Remember that the parent process runs as root and is not chroot().
 # NOTE: If you want the cb to run on a worker, be sure to set kore_cb_worker.
@@ -36,21 +36,25 @@ workers		4
 # HTTP specific settings.
 #	http_header_max		Maximum size of HTTP headers (in bytes).
 #	http_postbody_max	Maximum size of an HTTP POST body (in bytes).
+#	http_hsts_enable	Send Strict Transport Security header in
+#				all responses. Parameter is the age.
+#				Set age to 0 to disable sending this header.
 #http_header_max	4096
 #http_postbody_max	10240000
+#http_hsts_enable	31536000
 
 # Specifies what module to be loaded.
 load modules/example/example.module
 
 # Specify the SSL ciphers that will be used.
-#ssl_cipher	EECDH+AES:EDH+AES:-SHA1:EECDH+RC4:EDH+RC4:RC4-SHA:EECDH+AES256:EDH+AES256:AES256-SHA:!aNULL:!eNULL:!EXP:!LOW:!MD5
+#ssl_cipher	ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-GCM-SHA384: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-RSA-AES256-SHA256:DHE-DSS-AES256-SHA:AES128-GCM-SHA256:AES256-GCM-SHA384:HIGH:!aNULL:!eNULL:!EXPORT:!DES:!3DES:!MD5:!PSK
 
 # If you wish to use EDH / ECDH specify a file containing
 # a generated DH key (See OpenSSL dhparam).
 #ssl_dhparam	dh2048.pem
 
 # Set this if you want to disable SSL zlib compression.
-#ssl_no_compression
+ssl_no_compression
 
 # Specify the amount of seconds a SPDY connection is kept open.
 # You can keep it open indefinately by setting this to 0.
@@ -78,6 +82,8 @@ domain localhost {
 	certfile	cert/server.crt
 	certkey		cert/server.key
 	accesslog	/var/log/kore_access.log
+
+	# Page handlers
 	static		/css/style.css		serve_style_css
 	static		/			serve_index
 	static		/intro.jpg		serve_intro

src/config.c

@@ -44,6 +44,7 @@ static int		configure_kore_cb_interval(char **);
 static int		configure_kore_cb_worker(char **);
 static int		configure_http_header_max(char **);
 static int		configure_http_postbody_max(char **);
+static int		configure_http_hsts_enable(char **);
 static void		domain_sslstart(void);
 
 static struct {
@@ -73,6 +74,7 @@ static struct {
 	{ "kore_cb_interval",		configure_kore_cb_interval },
 	{ "http_header_max",		configure_http_header_max },
 	{ "http_postbody_max",		configure_http_postbody_max },
+	{ "http_hsts_enable",		configure_http_hsts_enable },
 	{ NULL,				NULL },
 };
 
@@ -551,6 +553,28 @@ configure_http_postbody_max(char **argv)
 	return (KORE_RESULT_OK);
 }
 
+static int
+configure_http_hsts_enable(char **argv)
+{
+	int		err;
+
+	if (argv[1] == NULL)
+		return (KORE_RESULT_ERROR);
+
+	if (http_hsts_enable != HTTP_HSTS_ENABLE) {
+		kore_debug("http_hsts_enable already set");
+		return (KORE_RESULT_ERROR);
+	}
+
+	http_hsts_enable = kore_strtonum(argv[1], 10, 1, ULONG_MAX, &err);
+	if (err != KORE_RESULT_OK) {
+		printf("bad http_hsts_enable value: %s\n", argv[1]);
+		return (KORE_RESULT_ERROR);
+	}
+
+	return (KORE_RESULT_OK);
+}
+
 static void
 domain_sslstart(void)
 {

src/http.c

@@ -31,6 +31,7 @@ static struct kore_pool			http_request_pool;
 static struct kore_pool			http_header_pool;
 
 int		http_request_count;
+u_int64_t	http_hsts_enable = HTTP_HSTS_ENABLE;
 u_int16_t	http_header_max = HTTP_HEADER_MAX_LEN;
 u_int64_t	http_postbody_max = HTTP_POSTBODY_MAX_LEN;
 
@@ -258,6 +259,14 @@ http_response(struct http_request *req, int status, u_int8_t *d, u_int32_t len)
 		spdy_header_block_add(hblock, ":status", sbuf);
 		spdy_header_block_add(hblock, ":version", "HTTP/1.1");
 		spdy_header_block_add(hblock, ":server", KORE_NAME_STRING);
+
+		if (http_hsts_enable) {
+			snprintf(sbuf, sizeof(sbuf),
+			    "max-age=%lu", http_hsts_enable);
+			spdy_header_block_add(hblock,
+			    ":strict-transport-security", sbuf);
+		}
+
 		TAILQ_FOREACH(hdr, &(req->resp_headers), list)
 			spdy_header_block_add(hblock, hdr->header, hdr->value);
 
@@ -293,6 +302,12 @@ http_response(struct http_request *req, int status, u_int8_t *d, u_int32_t len)
 		kore_buf_appendf(buf, "Keep-Alive: timeout=20\r\n");
 		kore_buf_appendf(buf, "Server: %s\r\n", KORE_NAME_STRING);
 
+		if (http_hsts_enable) {
+			kore_buf_appendf(buf,
+			    "Strict-Transport-Security: max-age=%lu\r\n",
+			    http_hsts_enable);
+		}
+
 		TAILQ_FOREACH(hdr, &(req->resp_headers), list) {
 			kore_buf_appendf(buf, "%s: %s\r\n",
 			    hdr->header, hdr->value);