TUN-528: Move cloudflared into a separate repo

vendor/zombiezen.com/go/capnproto2/internal/packed/fuzz.go

@@ -0,0 +1,65 @@
+// +build gofuzz
+
+// Fuzz test harness.  To run:
+// go-fuzz-build zombiezen.com/go/capnproto2/internal/packed
+// go-fuzz -bin=packed-fuzz.zip -workdir=internal/packed/testdata
+
+package packed
+
+import (
+	"bufio"
+	"bytes"
+	"io"
+	"io/ioutil"
+)
+
+func Fuzz(data []byte) int {
+	result := 0
+
+	// Unpacked
+	if unpacked, err := Unpack(nil, data); err == nil {
+		checkRepack(unpacked)
+		result = 1
+	}
+
+	// Read
+	{
+		r := NewReader(bufio.NewReader(bytes.NewReader(data)))
+		if unpacked, err := ioutil.ReadAll(r); err == nil {
+			checkRepack(unpacked)
+			result = 1
+		}
+	}
+
+	// ReadWord
+	{
+		r := NewReader(bufio.NewReader(bytes.NewReader(data)))
+		var unpacked []byte
+		var err error
+		for {
+			n := len(unpacked)
+			unpacked = append(unpacked, 0, 0, 0, 0, 0, 0, 0, 0)
+			if err = r.ReadWord(unpacked[n:]); err != nil {
+				unpacked = unpacked[:n]
+				break
+			}
+		}
+		if err == io.EOF {
+			checkRepack(unpacked)
+			result = 1
+		}
+	}
+
+	return result
+}
+
+func checkRepack(unpacked []byte) {
+	packed := Pack(nil, unpacked)
+	unpacked2, err := Unpack(nil, packed)
+	if err != nil {
+		panic("correctness: unpack, pack, unpack gives error: " + err.Error())
+	}
+	if !bytes.Equal(unpacked, unpacked2) {
+		panic("correctness: unpack, pack, unpack gives different results")
+	}
+}