mirror of
https://gitlab.com/pulsechaincom/erigon-pulse.git
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2adcc31bb4
The previous metric was pubkey1^pubkey2, as specified in the Kademlia paper. We missed that EC public keys are not uniformly distributed. Using the hash of the public keys addresses that. It also makes it a bit harder to generate node IDs that are close to a particular node.
239 lines
7.4 KiB
Go
239 lines
7.4 KiB
Go
package discover
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import (
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"math/big"
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"math/rand"
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"net"
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"reflect"
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"testing"
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"testing/quick"
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"time"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/crypto"
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)
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var (
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quickrand = rand.New(rand.NewSource(time.Now().Unix()))
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quickcfg = &quick.Config{MaxCount: 5000, Rand: quickrand}
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)
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var parseNodeTests = []struct {
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rawurl string
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wantError string
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wantResult *Node
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}{
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{
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rawurl: "http://foobar",
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wantError: `invalid URL scheme, want "enode"`,
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},
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{
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rawurl: "enode://foobar",
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wantError: `does not contain node ID`,
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},
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{
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rawurl: "enode://01010101@123.124.125.126:3",
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wantError: `invalid node ID (wrong length, need 64 hex bytes)`,
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},
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{
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rawurl: "enode://1dd9d65c4552b5eb43d5ad55a2ee3f56c6cbc1c64a5c8d659f51fcd51bace24351232b8d7821617d2b29b54b81cdefb9b3e9c37d7fd5f63270bcc9e1a6f6a439@hostname:3",
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wantError: `invalid IP address`,
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},
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{
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rawurl: "enode://1dd9d65c4552b5eb43d5ad55a2ee3f56c6cbc1c64a5c8d659f51fcd51bace24351232b8d7821617d2b29b54b81cdefb9b3e9c37d7fd5f63270bcc9e1a6f6a439@127.0.0.1:foo",
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wantError: `invalid port`,
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},
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{
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rawurl: "enode://1dd9d65c4552b5eb43d5ad55a2ee3f56c6cbc1c64a5c8d659f51fcd51bace24351232b8d7821617d2b29b54b81cdefb9b3e9c37d7fd5f63270bcc9e1a6f6a439@127.0.0.1:3?discport=foo",
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wantError: `invalid discport in query`,
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},
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{
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rawurl: "enode://1dd9d65c4552b5eb43d5ad55a2ee3f56c6cbc1c64a5c8d659f51fcd51bace24351232b8d7821617d2b29b54b81cdefb9b3e9c37d7fd5f63270bcc9e1a6f6a439@127.0.0.1:52150",
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wantResult: newNode(
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MustHexID("0x1dd9d65c4552b5eb43d5ad55a2ee3f56c6cbc1c64a5c8d659f51fcd51bace24351232b8d7821617d2b29b54b81cdefb9b3e9c37d7fd5f63270bcc9e1a6f6a439"),
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net.IP{0x7f, 0x0, 0x0, 0x1},
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52150,
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52150,
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),
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},
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{
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rawurl: "enode://1dd9d65c4552b5eb43d5ad55a2ee3f56c6cbc1c64a5c8d659f51fcd51bace24351232b8d7821617d2b29b54b81cdefb9b3e9c37d7fd5f63270bcc9e1a6f6a439@[::]:52150",
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wantResult: newNode(
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MustHexID("0x1dd9d65c4552b5eb43d5ad55a2ee3f56c6cbc1c64a5c8d659f51fcd51bace24351232b8d7821617d2b29b54b81cdefb9b3e9c37d7fd5f63270bcc9e1a6f6a439"),
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net.ParseIP("::"),
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52150,
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52150,
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),
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},
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{
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rawurl: "enode://1dd9d65c4552b5eb43d5ad55a2ee3f56c6cbc1c64a5c8d659f51fcd51bace24351232b8d7821617d2b29b54b81cdefb9b3e9c37d7fd5f63270bcc9e1a6f6a439@[2001:db8:3c4d:15::abcd:ef12]:52150",
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wantResult: newNode(
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MustHexID("0x1dd9d65c4552b5eb43d5ad55a2ee3f56c6cbc1c64a5c8d659f51fcd51bace24351232b8d7821617d2b29b54b81cdefb9b3e9c37d7fd5f63270bcc9e1a6f6a439"),
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net.ParseIP("2001:db8:3c4d:15::abcd:ef12"),
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52150,
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52150,
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),
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},
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{
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rawurl: "enode://1dd9d65c4552b5eb43d5ad55a2ee3f56c6cbc1c64a5c8d659f51fcd51bace24351232b8d7821617d2b29b54b81cdefb9b3e9c37d7fd5f63270bcc9e1a6f6a439@127.0.0.1:52150?discport=22334",
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wantResult: newNode(
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MustHexID("0x1dd9d65c4552b5eb43d5ad55a2ee3f56c6cbc1c64a5c8d659f51fcd51bace24351232b8d7821617d2b29b54b81cdefb9b3e9c37d7fd5f63270bcc9e1a6f6a439"),
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net.IP{0x7f, 0x0, 0x0, 0x1},
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22334,
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52150,
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),
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},
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}
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func TestParseNode(t *testing.T) {
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for i, test := range parseNodeTests {
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n, err := ParseNode(test.rawurl)
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if test.wantError != "" {
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if err == nil {
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t.Errorf("test %d: got nil error, expected %#q", i, test.wantError)
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continue
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} else if err.Error() != test.wantError {
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t.Errorf("test %d: got error %#q, expected %#q", i, err.Error(), test.wantError)
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continue
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}
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} else {
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if err != nil {
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t.Errorf("test %d: unexpected error: %v", i, err)
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continue
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}
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if !reflect.DeepEqual(n, test.wantResult) {
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t.Errorf("test %d: result mismatch:\ngot: %#v, want: %#v", i, n, test.wantResult)
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}
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}
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}
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}
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func TestNodeString(t *testing.T) {
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for i, test := range parseNodeTests {
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if test.wantError != "" {
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continue
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}
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str := test.wantResult.String()
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if str != test.rawurl {
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t.Errorf("test %d: Node.String() mismatch:\ngot: %s\nwant: %s", i, str, test.rawurl)
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}
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}
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}
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func TestHexID(t *testing.T) {
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ref := NodeID{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 128, 106, 217, 182, 31, 165, 174, 1, 67, 7, 235, 220, 150, 66, 83, 173, 205, 159, 44, 10, 57, 42, 161, 26, 188}
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id1 := MustHexID("0x000000000000000000000000000000000000000000000000000000000000000000000000000000806ad9b61fa5ae014307ebdc964253adcd9f2c0a392aa11abc")
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id2 := MustHexID("000000000000000000000000000000000000000000000000000000000000000000000000000000806ad9b61fa5ae014307ebdc964253adcd9f2c0a392aa11abc")
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if id1 != ref {
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t.Errorf("wrong id1\ngot %v\nwant %v", id1[:], ref[:])
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}
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if id2 != ref {
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t.Errorf("wrong id2\ngot %v\nwant %v", id2[:], ref[:])
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}
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}
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func TestNodeID_recover(t *testing.T) {
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prv := newkey()
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hash := make([]byte, 32)
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sig, err := crypto.Sign(hash, prv)
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if err != nil {
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t.Fatalf("signing error: %v", err)
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}
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pub := PubkeyID(&prv.PublicKey)
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recpub, err := recoverNodeID(hash, sig)
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if err != nil {
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t.Fatalf("recovery error: %v", err)
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}
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if pub != recpub {
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t.Errorf("recovered wrong pubkey:\ngot: %v\nwant: %v", recpub, pub)
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}
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ecdsa, err := pub.Pubkey()
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if err != nil {
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t.Errorf("Pubkey error: %v", err)
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}
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if !reflect.DeepEqual(ecdsa, &prv.PublicKey) {
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t.Errorf("Pubkey mismatch:\n got: %#v\n want: %#v", ecdsa, &prv.PublicKey)
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}
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}
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func TestNodeID_pubkeyBad(t *testing.T) {
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ecdsa, err := NodeID{}.Pubkey()
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if err == nil {
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t.Error("expected error for zero ID")
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}
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if ecdsa != nil {
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t.Error("expected nil result")
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}
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}
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func TestNodeID_distcmp(t *testing.T) {
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distcmpBig := func(target, a, b common.Hash) int {
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tbig := new(big.Int).SetBytes(target[:])
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abig := new(big.Int).SetBytes(a[:])
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bbig := new(big.Int).SetBytes(b[:])
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return new(big.Int).Xor(tbig, abig).Cmp(new(big.Int).Xor(tbig, bbig))
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}
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if err := quick.CheckEqual(distcmp, distcmpBig, quickcfg); err != nil {
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t.Error(err)
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}
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}
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// the random tests is likely to miss the case where they're equal.
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func TestNodeID_distcmpEqual(t *testing.T) {
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base := common.Hash{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15}
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x := common.Hash{15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0}
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if distcmp(base, x, x) != 0 {
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t.Errorf("distcmp(base, x, x) != 0")
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}
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}
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func TestNodeID_logdist(t *testing.T) {
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logdistBig := func(a, b common.Hash) int {
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abig, bbig := new(big.Int).SetBytes(a[:]), new(big.Int).SetBytes(b[:])
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return new(big.Int).Xor(abig, bbig).BitLen()
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}
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if err := quick.CheckEqual(logdist, logdistBig, quickcfg); err != nil {
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t.Error(err)
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}
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}
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// the random tests is likely to miss the case where they're equal.
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func TestNodeID_logdistEqual(t *testing.T) {
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x := common.Hash{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15}
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if logdist(x, x) != 0 {
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t.Errorf("logdist(x, x) != 0")
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}
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}
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func TestNodeID_hashAtDistance(t *testing.T) {
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// we don't use quick.Check here because its output isn't
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// very helpful when the test fails.
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for i := 0; i < quickcfg.MaxCount; i++ {
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a := gen(common.Hash{}, quickrand).(common.Hash)
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dist := quickrand.Intn(len(common.Hash{}) * 8)
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result := hashAtDistance(a, dist)
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actualdist := logdist(result, a)
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if dist != actualdist {
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t.Log("a: ", a)
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t.Log("result:", result)
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t.Fatalf("#%d: distance of result is %d, want %d", i, actualdist, dist)
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}
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}
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}
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// TODO: this can be dropped when we require Go >= 1.5
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// because testing/quick learned to generate arrays in 1.5.
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func (NodeID) Generate(rand *rand.Rand, size int) reflect.Value {
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var id NodeID
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m := rand.Intn(len(id))
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for i := len(id) - 1; i > m; i-- {
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id[i] = byte(rand.Uint32())
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}
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return reflect.ValueOf(id)
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}
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