Add fuzz tests for handshake

This adds a fuzz test to cover the DTLS handshake.

Co-Authored-By: Daniele Sluijters <daenney@users.noreply.github.com>

Author: Sam Lancia

AUTHORS.txt

@@ -39,8 +39,10 @@ Michiel De Backker <mail@backkem.me>
 Rachel Chen <rachel@chens.email>
 Robert Eperjesi <eperjesi@uber.com>
 Ryan Gordon <ryan.gordon@getcruise.com>
+Sam Lancia <sam.lancia@motorolasolutions.com>
 Sean DuBois <seaduboi@amazon.com>
 Sean DuBois <sean@siobud.com>
+Shelikhoo <xiaokangwang@outlook.com>
 Stefan Tatschner <stefan@rumpelsepp.org>
 Steffen Vogel <post@steffenvogel.de>
 Vadim <fffilimonov@yandex.ru>

pkg/protocol/handshake/fuzz_test.go

@@ -0,0 +1,21 @@
+package handshake
+
+import (
+	"testing"
+)
+
+func FuzzDtlsHandshake(f *testing.F) {
+	f.Fuzz(func(t *testing.T, data []byte) {
+		h := &Handshake{}
+		if err := h.Unmarshal(data); err != nil {
+			return
+		}
+		buf, err := h.Marshal()
+		if err != nil {
+			t.Fatal(err)
+		}
+		if len(buf) == 0 {
+			t.Fatal("Zero buff")
+		}
+	})
+}