reject passwords with single or double quotes or backslashes

salt/common/tools/sbin/so-common

@@ -44,4 +44,10 @@ lookup_pillar_secret() {
 check_container() {
 	docker ps | grep "$1:" > /dev/null 2>&1
 	return $?
+}
+
+check_password() {
+    local password=$1
+    echo "$password" | egrep -v "'|\"|\\\\" > /dev/null 2>&1
+    return $?
 }