github.com/jimmyx0x/go-ethereum@v1.10.28/p2p/discover/v5wire/crypto_test.go (about)

     1  // Copyright 2020 The go-ethereum Authors
     2  // This file is part of the go-ethereum library.
     3  //
     4  // The go-ethereum library is free software: you can redistribute it and/or modify
     5  // it under the terms of the GNU Lesser General Public License as published by
     6  // the Free Software Foundation, either version 3 of the License, or
     7  // (at your option) any later version.
     8  //
     9  // The go-ethereum library is distributed in the hope that it will be useful,
    10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    12  // GNU Lesser General Public License for more details.
    13  //
    14  // You should have received a copy of the GNU Lesser General Public License
    15  // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
    16  
    17  package v5wire
    18  
    19  import (
    20  	"bytes"
    21  	"crypto/ecdsa"
    22  	"crypto/elliptic"
    23  	"crypto/sha256"
    24  	"reflect"
    25  	"strings"
    26  	"testing"
    27  
    28  	"github.com/ethereum/go-ethereum/common/hexutil"
    29  	"github.com/ethereum/go-ethereum/crypto"
    30  	"github.com/ethereum/go-ethereum/p2p/enode"
    31  )
    32  
    33  func TestVector_ECDH(t *testing.T) {
    34  	var (
    35  		staticKey = hexPrivkey("0xfb757dc581730490a1d7a00deea65e9b1936924caaea8f44d476014856b68736")
    36  		publicKey = hexPubkey(crypto.S256(), "0x039961e4c2356d61bedb83052c115d311acb3a96f5777296dcf297351130266231")
    37  		want      = hexutil.MustDecode("0x033b11a2a1f214567e1537ce5e509ffd9b21373247f2a3ff6841f4976f53165e7e")
    38  	)
    39  	result := ecdh(staticKey, publicKey)
    40  	check(t, "shared-secret", result, want)
    41  }
    42  
    43  func TestVector_KDF(t *testing.T) {
    44  	var (
    45  		ephKey = hexPrivkey("0xfb757dc581730490a1d7a00deea65e9b1936924caaea8f44d476014856b68736")
    46  		cdata  = hexutil.MustDecode("0x000000000000000000000000000000006469736376350001010102030405060708090a0b0c00180102030405060708090a0b0c0d0e0f100000000000000000")
    47  		net    = newHandshakeTest()
    48  	)
    49  	defer net.close()
    50  
    51  	destKey := &testKeyB.PublicKey
    52  	s := deriveKeys(sha256.New, ephKey, destKey, net.nodeA.id(), net.nodeB.id(), cdata)
    53  	t.Logf("ephemeral-key = %#x", ephKey.D)
    54  	t.Logf("dest-pubkey = %#x", EncodePubkey(destKey))
    55  	t.Logf("node-id-a = %#x", net.nodeA.id().Bytes())
    56  	t.Logf("node-id-b = %#x", net.nodeB.id().Bytes())
    57  	t.Logf("challenge-data = %#x", cdata)
    58  	check(t, "initiator-key", s.writeKey, hexutil.MustDecode("0xdccc82d81bd610f4f76d3ebe97a40571"))
    59  	check(t, "recipient-key", s.readKey, hexutil.MustDecode("0xac74bb8773749920b0d3a8881c173ec5"))
    60  }
    61  
    62  func TestVector_IDSignature(t *testing.T) {
    63  	var (
    64  		key    = hexPrivkey("0xfb757dc581730490a1d7a00deea65e9b1936924caaea8f44d476014856b68736")
    65  		destID = enode.HexID("0xbbbb9d047f0488c0b5a93c1c3f2d8bafc7c8ff337024a55434a0d0555de64db9")
    66  		ephkey = hexutil.MustDecode("0x039961e4c2356d61bedb83052c115d311acb3a96f5777296dcf297351130266231")
    67  		cdata  = hexutil.MustDecode("0x000000000000000000000000000000006469736376350001010102030405060708090a0b0c00180102030405060708090a0b0c0d0e0f100000000000000000")
    68  	)
    69  
    70  	sig, err := makeIDSignature(sha256.New(), key, cdata, ephkey, destID)
    71  	if err != nil {
    72  		t.Fatal(err)
    73  	}
    74  	t.Logf("static-key = %#x", key.D)
    75  	t.Logf("challenge-data = %#x", cdata)
    76  	t.Logf("ephemeral-pubkey = %#x", ephkey)
    77  	t.Logf("node-id-B = %#x", destID.Bytes())
    78  	expected := "0x94852a1e2318c4e5e9d422c98eaf19d1d90d876b29cd06ca7cb7546d0fff7b484fe86c09a064fe72bdbef73ba8e9c34df0cd2b53e9d65528c2c7f336d5dfc6e6"
    79  	check(t, "id-signature", sig, hexutil.MustDecode(expected))
    80  }
    81  
    82  func TestDeriveKeys(t *testing.T) {
    83  	t.Parallel()
    84  
    85  	var (
    86  		n1    = enode.ID{1}
    87  		n2    = enode.ID{2}
    88  		cdata = []byte{1, 2, 3, 4}
    89  	)
    90  	sec1 := deriveKeys(sha256.New, testKeyA, &testKeyB.PublicKey, n1, n2, cdata)
    91  	sec2 := deriveKeys(sha256.New, testKeyB, &testKeyA.PublicKey, n1, n2, cdata)
    92  	if sec1 == nil || sec2 == nil {
    93  		t.Fatal("key agreement failed")
    94  	}
    95  	if !reflect.DeepEqual(sec1, sec2) {
    96  		t.Fatalf("keys not equal:\n  %+v\n  %+v", sec1, sec2)
    97  	}
    98  }
    99  
   100  func check(t *testing.T, what string, x, y []byte) {
   101  	t.Helper()
   102  
   103  	if !bytes.Equal(x, y) {
   104  		t.Errorf("wrong %s: %#x != %#x", what, x, y)
   105  	} else {
   106  		t.Logf("%s = %#x", what, x)
   107  	}
   108  }
   109  
   110  func hexPrivkey(input string) *ecdsa.PrivateKey {
   111  	key, err := crypto.HexToECDSA(strings.TrimPrefix(input, "0x"))
   112  	if err != nil {
   113  		panic(err)
   114  	}
   115  	return key
   116  }
   117  
   118  func hexPubkey(curve elliptic.Curve, input string) *ecdsa.PublicKey {
   119  	key, err := DecodePubkey(curve, hexutil.MustDecode(input))
   120  	if err != nil {
   121  		panic(err)
   122  	}
   123  	return key
   124  }