Added some common methods

common/byteslice.go

@@ -1,7 +1,25 @@
 package common
 
-func Fingerprint(bytez []byte) []byte {
+func Fingerprint(slice []byte) []byte {
 	fingerprint := make([]byte, 6)
-	copy(fingerprint, bytez)
+	copy(fingerprint, slice)
 	return fingerprint
 }
+
+func RightPadBytes(slice []byte, l int) []byte {
+	if l < len(slice) {
+		return slice
+	}
+	padded := make([]byte, l)
+	copy(padded[0:len(slice)], slice)
+	return padded
+}
+
+func LeftPadBytes(slice []byte, l int) []byte {
+	if l < len(slice) {
+		return slice
+	}
+	padded := make([]byte, l)
+	copy(padded[l-len(slice):], slice)
+	return padded
+}