diff --git a/utils/curves.bash b/utils/curves.bash
index 6d62ad4..4168c02 100755
--- a/utils/curves.bash
+++ b/utils/curves.bash
@@ -4,23 +4,91 @@
 # x448 and x25519 are missing, others are not supported
 # License see testssl.sh
 
+readonly RUN_DIR=$(dirname "$0")
+
+test_openssl_suffix() {
+     local naming_ext="$(uname).$(uname -m)"
+     local uname_arch="$(uname -m)"
+     local myarch_suffix=""
+
+     [[ $uname_arch =~ 64 ]] && myarch_suffix=64 || myarch_suffix=32
+     if [[ -f "$1/openssl" ]] && [[ -x "$1/openssl" ]]; then
+          OPENSSL="$1/openssl"
+          return 0
+     elif [[ -f "$1/openssl.$naming_ext" ]] && [[ -x "$1/openssl.$naming_ext" ]]; then
+          OPENSSL="$1/openssl.$naming_ext"
+          return 0
+     fi
+     return 1
+}
+
+
+find_openssl_binary() {
+     # 0. check environment variable whether it's executable
+     if [[ -n "$OPENSSL" ]] && [[ ! -x "$OPENSSL" ]]; then
+          pr_warningln "\ncannot find specified (\$OPENSSL=$OPENSSL) binary."
+          outln " Looking some place else ..."
+     elif [[ -x "$OPENSSL" ]]; then
+          :    # 1. all ok supplied $OPENSSL was found and has excutable bit set -- testrun comes below
+     elif test_openssl_suffix $RUN_DIR; then
+          :    # 2. otherwise try openssl in path of testssl.sh
+     elif test_openssl_suffix ../$RUN_DIR; then
+          :    # 2. otherwise try openssl in path of testssl.sh
+     elif test_openssl_suffix ../$RUN_DIR/bin; then
+          :    # 3. otherwise here, this is supposed to be the standard --platform independed path in the future!!!
+     elif test_openssl_suffix "$(dirname "$(which openssl)")"; then
+          :    # 5. we tried hard and failed, so now we use the system binaries
+     fi
+
+     # no ERRFILE initialized yet, thus we use /dev/null for stderr directly
+     $OPENSSL version -a 2>/dev/null >/dev/null
+     if [[ $? -ne 0 ]] || [[ ! -x "$OPENSSL" ]]; then
+          echo "\ncannot exec or find any openssl binary" 
+          exit 1
+     fi
+     echo
+     echo "using $OPENSSL"
+     echo
+}
+
+
+VERBOSE=false
+if [[ $1 == "-v" ]]; then
+     VERBOSE=true
+     shift
+fi
 
 HN="$1"
 [ -z "$HN" ] && HN=testssl.sh
-for curve in $(bin/openssl.Linux.x86_64 ecparam -list_curves | awk -F':' '/:/ { print $1 }'); do
-	printf "$curve: "
+find_openssl_binary 
+
+ERRFILE=$(mktemp /tmp/curve_tester.R.XXXXXX) || exit -6
+TMPFILE=$(mktemp /tmp/curve_tester.T.XXXXXX) || exit -6
+
+
+for curve in $($OPENSSL ecparam -list_curves | awk -F':' '/:/ { print $1 }'); do
 	#if bin/openssl.Linux.x86_64 s_client -curves $curve -connect $HN:443 -servername $HN </dev/null 2>/dev/null | grep -q "BEGIN CERTIFICATE" ; then
 	#	echo 'YES'
 	#else
 	#	echo '--'
 	#fi
-	if bin/openssl.Linux.x86_64 s_client -cipher ECDH -curves $curve -connect $HN:443 -servername $HN </dev/null 2>/dev/null | grep "Server Temp Key:" ; then
-		:
+	$OPENSSL s_client -cipher ECDH -curves $curve -connect $HN:443 -servername $HN </dev/null 2>$ERRFILE | grep "Server Temp Key:" >$TMPFILE
+     if [[ $? -eq 0 ]]; then
+	     printf "$curve: "
+          cat $TMPFILE | sed 's/^.*Server Temp Key: //'
 	else
-		echo '--'
+          if grep -q 'Error with' $ERRFILE; then
+               if  "$VERBOSE"; then
+                    echo "$curve: no client support"
+               fi
+          else
+		     echo "$curve: --"
+          fi
 	fi
 done
 
-# vim:ts=5:sw=5:expandtab
-#  $Id: curves.bash,v 1.2 2016/07/08 09:39:27 dirkw Exp $ 
+rm -f $ERRFILE $TMPFILE
+
+# vim:ts=5:sw=5:expandtab
+#  $Id: curves.bash,v 1.3 2016/07/09 12:22:13 dirkw Exp $