// Copyright 2017 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package enr
import (
"bytes"
"encoding/hex"
"fmt"
"math/rand"
"testing"
"time"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/rlp"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)
var (
privkey, _ = crypto.HexToECDSA("b71c71a67e1177ad4e901695e1b4b9ee17ae16c6668d313eac2f96dbcda3f291")
pubkey = &privkey.PublicKey
)
var rnd = rand.New(rand.NewSource(time.Now().UnixNano()))
func randomString(strlen int) string {
b := make([]byte, strlen)
rnd.Read(b)
return string(b)
}
// TestGetSetID tests encoding/decoding and setting/getting of the ID key.
func TestGetSetID(t *testing.T) {
id := ID("someid")
var r Record
r.Set(id)
var id2 ID
require.NoError(t, r.Load(&id2))
assert.Equal(t, id, id2)
}
// TestGetSetIP4 tests encoding/decoding and setting/getting of the IP4 key.
func TestGetSetIP4(t *testing.T) {
ip := IP4{192, 168, 0, 3}
var r Record
r.Set(ip)
var ip2 IP4
require.NoError(t, r.Load(&ip2))
assert.Equal(t, ip, ip2)
}
// TestGetSetIP6 tests encoding/decoding and setting/getting of the IP6 key.
func TestGetSetIP6(t *testing.T) {
ip := IP6{0x20, 0x01, 0x48, 0x60, 0, 0, 0x20, 0x01, 0, 0, 0, 0, 0, 0, 0x00, 0x68}
var r Record
r.Set(ip)
var ip2 IP6
require.NoError(t, r.Load(&ip2))
assert.Equal(t, ip, ip2)
}
// TestGetSetDiscPort tests encoding/decoding and setting/getting of the DiscPort key.
func TestGetSetDiscPort(t *testing.T) {
port := DiscPort(30309)
var r Record
r.Set(port)
var port2 DiscPort
require.NoError(t, r.Load(&port2))
assert.Equal(t, port, port2)
}
// TestGetSetSecp256k1 tests encoding/decoding and setting/getting of the Secp256k1 key.
func TestGetSetSecp256k1(t *testing.T) {
var r Record
if err := r.Sign(privkey); err != nil {
t.Fatal(err)
}
var pk Secp256k1
require.NoError(t, r.Load(&pk))
assert.EqualValues(t, pubkey, &pk)
}
func TestLoadErrors(t *testing.T) {
var r Record
ip4 := IP4{127, 0, 0, 1}
r.Set(ip4)
// Check error for missing keys.
var ip6 IP6
err := r.Load(&ip6)
if !IsNotFound(err) {
t.Error("IsNotFound should return true for missing key")
}
assert.Equal(t, &KeyError{Key: ip6.ENRKey(), Err: errNotFound}, err)
// Check error for invalid keys.
var list []uint
err = r.Load(WithEntry(ip4.ENRKey(), &list))
kerr, ok := err.(*KeyError)
if !ok {
t.Fatalf("expected KeyError, got %T", err)
}
assert.Equal(t, kerr.Key, ip4.ENRKey())
assert.Error(t, kerr.Err)
if IsNotFound(err) {
t.Error("IsNotFound should return false for decoding errors")
}
}
// TestSortedGetAndSet tests that Set produced a sorted pairs slice.
func TestSortedGetAndSet(t *testing.T) {
type pair struct {
k string
v uint32
}
for _, tt := range []struct {
input []pair
want []pair
}{
{
input: []pair{{"a", 1}, {"c", 2}, {"b", 3}},
want: []pair{{"a", 1}, {"b", 3}, {"c", 2}},
},
{
input: []pair{{"a", 1}, {"c", 2}, {"b", 3}, {"d", 4}, {"a", 5}, {"bb", 6}},
want: []pair{{"a", 5}, {"b", 3}, {"bb", 6}, {"c", 2}, {"d", 4}},
},
{
input: []pair{{"c", 2}, {"b", 3}, {"d", 4}, {"a", 5}, {"bb", 6}},
want: []pair{{"a", 5}, {"b", 3}, {"bb", 6}, {"c", 2}, {"d", 4}},
},
} {
var r Record
for _, i := range tt.input {
r.Set(WithEntry(i.k, &i.v))
}
for i, w := range tt.want {
// set got's key from r.pair[i], so that we preserve order of pairs
got := pair{k: r.pairs[i].k}
assert.NoError(t, r.Load(WithEntry(w.k, &got.v)))
assert.Equal(t, w, got)
}
}
}
// TestDirty tests record signature removal on setting of new key/value pair in record.
func TestDirty(t *testing.T) {
var r Record
if r.Signed() {
t.Error("Signed returned true for zero record")
}
if _, err := rlp.EncodeToBytes(r); err != errEncodeUnsigned {
t.Errorf("expected errEncodeUnsigned, got %#v", err)
}
require.NoError(t, r.Sign(privkey))
if !r.Signed() {
t.Error("Signed return false for signed record")
}
_, err := rlp.EncodeToBytes(r)
assert.NoError(t, err)
r.SetSeq(3)
if r.Signed() {
t.Error("Signed returned true for modified record")
}
if _, err := rlp.EncodeToBytes(r); err != errEncodeUnsigned {
t.Errorf("expected errEncodeUnsigned, got %#v", err)
}
}
// TestGetSetOverwrite tests value overwrite when setting a new value with an existing key in record.
func TestGetSetOverwrite(t *testing.T) {
var r Record
ip := IP4{192, 168, 0, 3}
r.Set(ip)
ip2 := IP4{192, 168, 0, 4}
r.Set(ip2)
var ip3 IP4
require.NoError(t, r.Load(&ip3))
assert.Equal(t, ip2, ip3)
}
// TestSignEncodeAndDecode tests signing, RLP encoding and RLP decoding of a record.
func TestSignEncodeAndDecode(t *testing.T) {
var r Record
r.Set(DiscPort(30303))
r.Set(IP4{127, 0, 0, 1})
require.NoError(t, r.Sign(privkey))
blob, err := rlp.EncodeToBytes(r)
require.NoError(t, err)
var r2 Record
require.NoError(t, rlp.DecodeBytes(blob, &r2))
assert.Equal(t, r, r2)
blob2, err := rlp.EncodeToBytes(r2)
require.NoError(t, err)
assert.Equal(t, blob, blob2)
}
func TestNodeAddr(t *testing.T) {
var r Record
if addr := r.NodeAddr(); addr != nil {
t.Errorf("wrong address on empty record: got %v, want %v", addr, nil)
}
require.NoError(t, r.Sign(privkey))
expected := "caaa1485d83b18b32ed9ad666026151bf0cae8a0a88c857ae2d4c5be2daa6726"
assert.Equal(t, expected, hex.EncodeToString(r.NodeAddr()))
}
var pyRecord, _ = hex.DecodeString("f896b840954dc36583c1f4b69ab59b1375f362f06ee99f3723cd77e64b6de6d211c27d7870642a79d4516997f94091325d2a7ca6215376971455fb221d34f35b277149a1018664697363763582765f82696490736563703235366b312d6b656363616b83697034847f00000189736563703235366b31a103ca634cae0d49acb401d8a4c6b6fe8c55b70d115bf400769cc1400f3258cd3138")
// TestPythonInterop checks that we can decode and verify a record produced by the Python
// implementation.
func TestPythonInterop(t *testing.T) {
var r Record
if err := rlp.DecodeBytes(pyRecord, &r); err != nil {
t.Fatalf("can't decode: %v", err)
}
var (
wantAddr, _ = hex.DecodeString("caaa1485d83b18b32ed9ad666026151bf0cae8a0a88c857ae2d4c5be2daa6726")
wantSeq = uint64(1)
wantIP = IP4{127, 0, 0, 1}
wantDiscport = DiscPort(30303)
)
if r.Seq() != wantSeq {
t.Errorf("wrong seq: got %d, want %d", r.Seq(), wantSeq)
}
if addr := r.NodeAddr(); !bytes.Equal(addr, wantAddr) {
t.Errorf("wrong addr: got %x, want %x", addr, wantAddr)
}
want := map[Entry]interface{}{new(IP4): &wantIP, new(DiscPort): &wantDiscport}
for k, v := range want {
desc := fmt.Sprintf("loading key %q", k.ENRKey())
if assert.NoError(t, r.Load(k), desc) {
assert.Equal(t, k, v, desc)
}
}
}
// TestRecordTooBig tests that records bigger than SizeLimit bytes cannot be signed.
func TestRecordTooBig(t *testing.T) {
var r Record
key := randomString(10)
// set a big value for random key, expect error
r.Set(WithEntry(key, randomString(300)))
if err := r.Sign(privkey); err != errTooBig {
t.Fatalf("expected to get errTooBig, got %#v", err)
}
// set an acceptable value for random key, expect no error
r.Set(WithEntry(key, randomString(100)))
require.NoError(t, r.Sign(privkey))
}
// TestSignEncodeAndDecodeRandom tests encoding/decoding of records containing random key/value pairs.
func TestSignEncodeAndDecodeRandom(t *testing.T) {
var r Record
// random key/value pairs for testing
pairs := map[string]uint32{}
for i := 0; i < 10; i++ {
key := randomString(7)
value := rnd.Uint32()
pairs[key] = value
r.Set(WithEntry(key, &value))
}
require.NoError(t, r.Sign(privkey))
_, err := rlp.EncodeToBytes(r)
require.NoError(t, err)
for k, v := range pairs {
desc := fmt.Sprintf("key %q", k)
var got uint32
buf := WithEntry(k, &got)
require.NoError(t, r.Load(buf), desc)
require.Equal(t, v, got, desc)
}
}
func BenchmarkDecode(b *testing.B) {
var r Record
for i := 0; i < b.N; i++ {
rlp.DecodeBytes(pyRecord, &r)
}
b.StopTimer()
r.NodeAddr()
}
