diff --git a/src/Tools.js b/src/Tools.js
new file mode 100644
index 0000000..253254c
--- /dev/null
+++ b/src/Tools.js
@@ -0,0 +1,13 @@
+//check whether all given params exist in an object
+//var success = .reqParamsGiven(["username", "password"], req.body);
+exports.reqParamsGiven = function (keys, obj) {
+	if(typeof(obj) != "object" || obj.length < 1) return false;
+	for(k in keys) {
+		var key = keys[k];
+		var value = obj[key];
+		if(value == undefined) {
+			return false;
+		}
+	}
+	return true;
+}
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