0255951587
ToECDSAPub was unsafe because it returned a non-nil key with nil X, Y in case of invalid input. This change replaces ToECDSAPub with UnmarshalPubkey across the codebase.
251 lines
7.6 KiB
Go
251 lines
7.6 KiB
Go
// Copyright 2014 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package crypto
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import (
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"bytes"
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"crypto/ecdsa"
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"encoding/hex"
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"io/ioutil"
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"math/big"
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"os"
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"reflect"
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"testing"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/common/hexutil"
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)
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var testAddrHex = "970e8128ab834e8eac17ab8e3812f010678cf791"
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var testPrivHex = "289c2857d4598e37fb9647507e47a309d6133539bf21a8b9cb6df88fd5232032"
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// These tests are sanity checks.
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// They should ensure that we don't e.g. use Sha3-224 instead of Sha3-256
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// and that the sha3 library uses keccak-f permutation.
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func TestKeccak256Hash(t *testing.T) {
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msg := []byte("abc")
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exp, _ := hex.DecodeString("4e03657aea45a94fc7d47ba826c8d667c0d1e6e33a64a036ec44f58fa12d6c45")
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checkhash(t, "Sha3-256-array", func(in []byte) []byte { h := Keccak256Hash(in); return h[:] }, msg, exp)
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}
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func TestToECDSAErrors(t *testing.T) {
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if _, err := HexToECDSA("0000000000000000000000000000000000000000000000000000000000000000"); err == nil {
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t.Fatal("HexToECDSA should've returned error")
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}
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if _, err := HexToECDSA("ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"); err == nil {
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t.Fatal("HexToECDSA should've returned error")
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}
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}
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func BenchmarkSha3(b *testing.B) {
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a := []byte("hello world")
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for i := 0; i < b.N; i++ {
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Keccak256(a)
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}
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}
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func TestUnmarshalPubkey(t *testing.T) {
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key, err := UnmarshalPubkey(nil)
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if err != errInvalidPubkey || key != nil {
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t.Fatalf("expected error, got %v, %v", err, key)
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}
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key, err = UnmarshalPubkey([]byte{1, 2, 3})
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if err != errInvalidPubkey || key != nil {
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t.Fatalf("expected error, got %v, %v", err, key)
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}
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var (
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enc, _ = hex.DecodeString("04760c4460e5336ac9bbd87952a3c7ec4363fc0a97bd31c86430806e287b437fd1b01abc6e1db640cf3106b520344af1d58b00b57823db3e1407cbc433e1b6d04d")
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dec = &ecdsa.PublicKey{
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Curve: S256(),
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X: hexutil.MustDecodeBig("0x760c4460e5336ac9bbd87952a3c7ec4363fc0a97bd31c86430806e287b437fd1"),
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Y: hexutil.MustDecodeBig("0xb01abc6e1db640cf3106b520344af1d58b00b57823db3e1407cbc433e1b6d04d"),
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}
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)
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key, err = UnmarshalPubkey(enc)
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if err != nil {
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t.Fatalf("expected no error, got %v", err)
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}
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if !reflect.DeepEqual(key, dec) {
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t.Fatal("wrong result")
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}
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}
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func TestSign(t *testing.T) {
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key, _ := HexToECDSA(testPrivHex)
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addr := common.HexToAddress(testAddrHex)
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msg := Keccak256([]byte("foo"))
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sig, err := Sign(msg, key)
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if err != nil {
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t.Errorf("Sign error: %s", err)
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}
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recoveredPub, err := Ecrecover(msg, sig)
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if err != nil {
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t.Errorf("ECRecover error: %s", err)
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}
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pubKey, _ := UnmarshalPubkey(recoveredPub)
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recoveredAddr := PubkeyToAddress(*pubKey)
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if addr != recoveredAddr {
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t.Errorf("Address mismatch: want: %x have: %x", addr, recoveredAddr)
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}
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// should be equal to SigToPub
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recoveredPub2, err := SigToPub(msg, sig)
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if err != nil {
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t.Errorf("ECRecover error: %s", err)
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}
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recoveredAddr2 := PubkeyToAddress(*recoveredPub2)
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if addr != recoveredAddr2 {
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t.Errorf("Address mismatch: want: %x have: %x", addr, recoveredAddr2)
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}
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}
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func TestInvalidSign(t *testing.T) {
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if _, err := Sign(make([]byte, 1), nil); err == nil {
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t.Errorf("expected sign with hash 1 byte to error")
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}
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if _, err := Sign(make([]byte, 33), nil); err == nil {
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t.Errorf("expected sign with hash 33 byte to error")
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}
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}
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func TestNewContractAddress(t *testing.T) {
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key, _ := HexToECDSA(testPrivHex)
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addr := common.HexToAddress(testAddrHex)
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genAddr := PubkeyToAddress(key.PublicKey)
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// sanity check before using addr to create contract address
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checkAddr(t, genAddr, addr)
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caddr0 := CreateAddress(addr, 0)
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caddr1 := CreateAddress(addr, 1)
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caddr2 := CreateAddress(addr, 2)
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checkAddr(t, common.HexToAddress("333c3310824b7c685133f2bedb2ca4b8b4df633d"), caddr0)
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checkAddr(t, common.HexToAddress("8bda78331c916a08481428e4b07c96d3e916d165"), caddr1)
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checkAddr(t, common.HexToAddress("c9ddedf451bc62ce88bf9292afb13df35b670699"), caddr2)
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}
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func TestLoadECDSAFile(t *testing.T) {
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keyBytes := common.FromHex(testPrivHex)
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fileName0 := "test_key0"
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fileName1 := "test_key1"
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checkKey := func(k *ecdsa.PrivateKey) {
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checkAddr(t, PubkeyToAddress(k.PublicKey), common.HexToAddress(testAddrHex))
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loadedKeyBytes := FromECDSA(k)
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if !bytes.Equal(loadedKeyBytes, keyBytes) {
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t.Fatalf("private key mismatch: want: %x have: %x", keyBytes, loadedKeyBytes)
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}
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}
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ioutil.WriteFile(fileName0, []byte(testPrivHex), 0600)
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defer os.Remove(fileName0)
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key0, err := LoadECDSA(fileName0)
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if err != nil {
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t.Fatal(err)
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}
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checkKey(key0)
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// again, this time with SaveECDSA instead of manual save:
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err = SaveECDSA(fileName1, key0)
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if err != nil {
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t.Fatal(err)
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}
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defer os.Remove(fileName1)
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key1, err := LoadECDSA(fileName1)
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if err != nil {
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t.Fatal(err)
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}
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checkKey(key1)
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}
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func TestValidateSignatureValues(t *testing.T) {
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check := func(expected bool, v byte, r, s *big.Int) {
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if ValidateSignatureValues(v, r, s, false) != expected {
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t.Errorf("mismatch for v: %d r: %d s: %d want: %v", v, r, s, expected)
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}
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}
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minusOne := big.NewInt(-1)
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one := common.Big1
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zero := common.Big0
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secp256k1nMinus1 := new(big.Int).Sub(secp256k1N, common.Big1)
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// correct v,r,s
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check(true, 0, one, one)
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check(true, 1, one, one)
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// incorrect v, correct r,s,
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check(false, 2, one, one)
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check(false, 3, one, one)
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// incorrect v, combinations of incorrect/correct r,s at lower limit
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check(false, 2, zero, zero)
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check(false, 2, zero, one)
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check(false, 2, one, zero)
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check(false, 2, one, one)
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// correct v for any combination of incorrect r,s
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check(false, 0, zero, zero)
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check(false, 0, zero, one)
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check(false, 0, one, zero)
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check(false, 1, zero, zero)
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check(false, 1, zero, one)
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check(false, 1, one, zero)
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// correct sig with max r,s
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check(true, 0, secp256k1nMinus1, secp256k1nMinus1)
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// correct v, combinations of incorrect r,s at upper limit
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check(false, 0, secp256k1N, secp256k1nMinus1)
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check(false, 0, secp256k1nMinus1, secp256k1N)
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check(false, 0, secp256k1N, secp256k1N)
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// current callers ensures r,s cannot be negative, but let's test for that too
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// as crypto package could be used stand-alone
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check(false, 0, minusOne, one)
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check(false, 0, one, minusOne)
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}
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func checkhash(t *testing.T, name string, f func([]byte) []byte, msg, exp []byte) {
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sum := f(msg)
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if !bytes.Equal(exp, sum) {
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t.Fatalf("hash %s mismatch: want: %x have: %x", name, exp, sum)
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}
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}
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func checkAddr(t *testing.T, addr0, addr1 common.Address) {
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if addr0 != addr1 {
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t.Fatalf("address mismatch: want: %x have: %x", addr0, addr1)
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}
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}
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// test to help Python team with integration of libsecp256k1
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// skip but keep it after they are done
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func TestPythonIntegration(t *testing.T) {
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kh := "289c2857d4598e37fb9647507e47a309d6133539bf21a8b9cb6df88fd5232032"
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k0, _ := HexToECDSA(kh)
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msg0 := Keccak256([]byte("foo"))
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sig0, _ := Sign(msg0, k0)
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msg1 := common.FromHex("00000000000000000000000000000000")
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sig1, _ := Sign(msg0, k0)
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t.Logf("msg: %x, privkey: %s sig: %x\n", msg0, kh, sig0)
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t.Logf("msg: %x, privkey: %s sig: %x\n", msg1, kh, sig1)
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}
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