diff --git a/lib/hash.js b/lib/hash.js
index 0ba390d..bc7362f 100644
--- a/lib/hash.js
+++ b/lib/hash.js
@@ -34,6 +34,17 @@
 		return hash;
 	};
 	
+	scope.hashCode = function(inputByteArray){
+		var hash = new Uint32Array(1);
+		var intView = new Uint32Array(inputByteArray.buffer);
+		var length = intView.length;
+		for (let i = 0; i < length; i += 1){
+			var v = hash[0];
+			hash[0] = ((v << 5) - v) + intView[i];
+		}
+		return hash;
+	};
+	
 	scope.md5 = function(){
 		function leftRotate(v, rotate){
 			return v << rotate | v >>> (32 - rotate);
@@ -222,4 +233,7 @@
 	scope.sumXorString = function(byteArray){
 		return scope.byteArrayToString(scope.sumXor(byteArray));
 	};
+	scope.hashCodeString = function(byteArray){
+		return String.fromCharCode(scope.hashCode(byteArray)[0]);
+	};
 }());
\ No newline at end of file