From d81ee1c801bd70bdb6c6e515a45a6bb589a0a4a5 Mon Sep 17 00:00:00 2001
From: Richard Soderberg <rsoderberg@gmail.com>
Date: Sat, 5 Sep 2015 01:06:09 -0700
Subject: [PATCH] Refuse to proceed if no HOST[:PORT] is provided after the
 options.

Prior to this patch, if the user fails to provide a host:port after
specifying cipherscan options, the script runs sed on an empty variable
(failing with a syntax error) and then asttempts to cipherscan the
target ':443'.

This adds a simple test to ensure that a target was actually provided.
---
 cipherscan | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/cipherscan b/cipherscan
index 361f4fa..1553ed1 100755
--- a/cipherscan
+++ b/cipherscan
@@ -1350,6 +1350,11 @@ done
 
 # echo parameters left: $@
 
+if (( $# < 1 )); then
+    echo "The final argument must be a valid HOST[:PORT], but none was provided." 1>&2
+    exit 1
+fi
+
 TEMPTARGET=$(sed -e 's/^.* //'<<<"${@}")
 HOST=$(sed -e 's/:.*//'<<<"${TEMPTARGET}")
 PORT=$(sed -e 's/.*://'<<<"${TEMPTARGET}")