Add fuzz tests for handshake

This adds a fuzz test to cover the DTLS handshake.

Co-Authored-By: Daniele Sluijters <[email protected]>

AUTHORS.txt

@@ -39,8 +39,10 @@ Michiel De Backker <[email protected]>
 Rachel Chen <[email protected]>
 Robert Eperjesi <[email protected]>
 Ryan Gordon <[email protected]>
+Sam Lancia <[email protected]>
 Sean DuBois <[email protected]>
 Sean DuBois <[email protected]>
+Shelikhoo <[email protected]>
 Stefan Tatschner <[email protected]>
 Steffen Vogel <[email protected]>
 Vadim <[email protected]>

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")
+		}
+	})
+}