diff --git a/files/dhparams.sh b/files/dhparams.sh
new file mode 100755
index 0000000000000000000000000000000000000000..eb97eb4dd0347760eed541a422940a33f2f46cc0
--- /dev/null
+++ b/files/dhparams.sh
@@ -0,0 +1,7 @@
+#!/bin/sh -e
+if [ -f /etc/ssl/dhparams.pem ]
+then
+    openssl dhparam -in /etc/ssl/dhparams.pem -text -noout | sed -n 's/Diffie-Hellman-Parameters: (\([0-9]*\) bit)/\1/p'
+else
+    echo 0
+fi