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status-go/extkeys/hdkey_test.go

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package extkeys
import (
"bytes"
"encoding/hex"
"errors"
"fmt"
"reflect"
"testing"
"github.com/btcsuite/btcd/chaincfg"
"github.com/ethereum/go-ethereum/crypto"
)
const (
masterPrivKey1 = "xprv9s21ZrQH143K3QTDL4LXw2F7HEK3wJUD2nW2nRk4stbPy6cq3jPPqjiChkVvvNKmPGJxWUtg6LnF5kejMRNNU3TGtRBeJgk33yuGBxrMPHi"
masterPrivKey2 = "xprv9s21ZrQH143K31xYSDQpPDxsXRTUcvj2iNHm5NUtrGiGG5e2DtALGdso3pGz6ssrdK4PFmM8NSpSBHNqPqm55Qn3LqFtT2emdEXVYsCzC2U"
)
func TestBIP32Vectors(t *testing.T) {
// Test vectors 1, 2, and 3 are taken from the BIP32 specs:
// https://github.com/bitcoin/bips/blob/master/bip-0032.mediawiki#test-vectors
tests := []struct {
name string
seed string
path []uint32
pubKey string
privKey string
}{
// Test vector 1
{
"test vector 1 chain m",
"000102030405060708090a0b0c0d0e0f",
[]uint32{},
"xpub661MyMwAqRbcFtXgS5sYJABqqG9YLmC4Q1Rdap9gSE8NqtwybGhePY2gZ29ESFjqJoCu1Rupje8YtGqsefD265TMg7usUDFdp6W1EGMcet8",
masterPrivKey1,
},
{
"test vector 1 chain m/0H",
"000102030405060708090a0b0c0d0e0f",
[]uint32{HardenedKeyStart},
"xpub68Gmy5EdvgibQVfPdqkBBCHxA5htiqg55crXYuXoQRKfDBFA1WEjWgP6LHhwBZeNK1VTsfTFUHCdrfp1bgwQ9xv5ski8PX9rL2dZXvgGDnw",
"xprv9uHRZZhk6KAJC1avXpDAp4MDc3sQKNxDiPvvkX8Br5ngLNv1TxvUxt4cV1rGL5hj6KCesnDYUhd7oWgT11eZG7XnxHrnYeSvkzY7d2bhkJ7",
},
{
"test vector 1 chain m/0H/1",
"000102030405060708090a0b0c0d0e0f",
[]uint32{HardenedKeyStart, 1},
"xpub6ASuArnXKPbfEwhqN6e3mwBcDTgzisQN1wXN9BJcM47sSikHjJf3UFHKkNAWbWMiGj7Wf5uMash7SyYq527Hqck2AxYysAA7xmALppuCkwQ",
"xprv9wTYmMFdV23N2TdNG573QoEsfRrWKQgWeibmLntzniatZvR9BmLnvSxqu53Kw1UmYPxLgboyZQaXwTCg8MSY3H2EU4pWcQDnRnrVA1xe8fs",
},
{
"test vector 1 chain m/0H/1/2H",
"000102030405060708090a0b0c0d0e0f",
[]uint32{HardenedKeyStart, 1, HardenedKeyStart + 2},
"xpub6D4BDPcP2GT577Vvch3R8wDkScZWzQzMMUm3PWbmWvVJrZwQY4VUNgqFJPMM3No2dFDFGTsxxpG5uJh7n7epu4trkrX7x7DogT5Uv6fcLW5",
"xprv9z4pot5VBttmtdRTWfWQmoH1taj2axGVzFqSb8C9xaxKymcFzXBDptWmT7FwuEzG3ryjH4ktypQSAewRiNMjANTtpgP4mLTj34bhnZX7UiM",
},
{
"test vector 1 chain m/0H/1/2H/2",
"000102030405060708090a0b0c0d0e0f",
[]uint32{HardenedKeyStart, 1, HardenedKeyStart + 2, 2},
"xpub6FHa3pjLCk84BayeJxFW2SP4XRrFd1JYnxeLeU8EqN3vDfZmbqBqaGJAyiLjTAwm6ZLRQUMv1ZACTj37sR62cfN7fe5JnJ7dh8zL4fiyLHV",
"xprvA2JDeKCSNNZky6uBCviVfJSKyQ1mDYahRjijr5idH2WwLsEd4Hsb2Tyh8RfQMuPh7f7RtyzTtdrbdqqsunu5Mm3wDvUAKRHSC34sJ7in334",
},
{
"test vector 1 chain m/0H/1/2H/2/1000000000",
"000102030405060708090a0b0c0d0e0f",
[]uint32{HardenedKeyStart, 1, HardenedKeyStart + 2, 2, 1000000000},
"xpub6H1LXWLaKsWFhvm6RVpEL9P4KfRZSW7abD2ttkWP3SSQvnyA8FSVqNTEcYFgJS2UaFcxupHiYkro49S8yGasTvXEYBVPamhGW6cFJodrTHy",
"xprvA41z7zogVVwxVSgdKUHDy1SKmdb533PjDz7J6N6mV6uS3ze1ai8FHa8kmHScGpWmj4WggLyQjgPie1rFSruoUihUZREPSL39UNdE3BBDu76",
},
// Test vector 2
{
"test vector 2 chain m",
"fffcf9f6f3f0edeae7e4e1dedbd8d5d2cfccc9c6c3c0bdbab7b4b1aeaba8a5a29f9c999693908d8a8784817e7b7875726f6c696663605d5a5754514e4b484542",
[]uint32{},
"xpub661MyMwAqRbcFW31YEwpkMuc5THy2PSt5bDMsktWQcFF8syAmRUapSCGu8ED9W6oDMSgv6Zz8idoc4a6mr8BDzTJY47LJhkJ8UB7WEGuduB",
masterPrivKey2,
},
{
"test vector 2 chain m/0",
"fffcf9f6f3f0edeae7e4e1dedbd8d5d2cfccc9c6c3c0bdbab7b4b1aeaba8a5a29f9c999693908d8a8784817e7b7875726f6c696663605d5a5754514e4b484542",
[]uint32{0},
"xpub69H7F5d8KSRgmmdJg2KhpAK8SR3DjMwAdkxj3ZuxV27CprR9LgpeyGmXUbC6wb7ERfvrnKZjXoUmmDznezpbZb7ap6r1D3tgFxHmwMkQTPH",
"xprv9vHkqa6EV4sPZHYqZznhT2NPtPCjKuDKGY38FBWLvgaDx45zo9WQRUT3dKYnjwih2yJD9mkrocEZXo1ex8G81dwSM1fwqWpWkeS3v86pgKt",
},
{
"test vector 2 chain m/0/2147483647H",
"fffcf9f6f3f0edeae7e4e1dedbd8d5d2cfccc9c6c3c0bdbab7b4b1aeaba8a5a29f9c999693908d8a8784817e7b7875726f6c696663605d5a5754514e4b484542",
[]uint32{0, HardenedKeyStart + 2147483647},
"xpub6ASAVgeehLbnwdqV6UKMHVzgqAG8Gr6riv3Fxxpj8ksbH9ebxaEyBLZ85ySDhKiLDBrQSARLq1uNRts8RuJiHjaDMBU4Zn9h8LZNnBC5y4a",
"xprv9wSp6B7kry3Vj9m1zSnLvN3xH8RdsPP1Mh7fAaR7aRLcQMKTR2vidYEeEg2mUCTAwCd6vnxVrcjfy2kRgVsFawNzmjuHc2YmYRmagcEPdU9",
},
{
"test vector 2 chain m/0/2147483647H/1",
"fffcf9f6f3f0edeae7e4e1dedbd8d5d2cfccc9c6c3c0bdbab7b4b1aeaba8a5a29f9c999693908d8a8784817e7b7875726f6c696663605d5a5754514e4b484542",
[]uint32{0, HardenedKeyStart + 2147483647, 1},
"xpub6DF8uhdarytz3FWdA8TvFSvvAh8dP3283MY7p2V4SeE2wyWmG5mg5EwVvmdMVCQcoNJxGoWaU9DCWh89LojfZ537wTfunKau47EL2dhHKon",
"xprv9zFnWC6h2cLgpmSA46vutJzBcfJ8yaJGg8cX1e5StJh45BBciYTRXSd25UEPVuesF9yog62tGAQtHjXajPPdbRCHuWS6T8XA2ECKADdw4Ef",
},
{
"test vector 2 chain m/0/2147483647H/1/2147483646H",
"fffcf9f6f3f0edeae7e4e1dedbd8d5d2cfccc9c6c3c0bdbab7b4b1aeaba8a5a29f9c999693908d8a8784817e7b7875726f6c696663605d5a5754514e4b484542",
[]uint32{0, HardenedKeyStart + 2147483647, 1, HardenedKeyStart + 2147483646},
"xpub6ERApfZwUNrhLCkDtcHTcxd75RbzS1ed54G1LkBUHQVHQKqhMkhgbmJbZRkrgZw4koxb5JaHWkY4ALHY2grBGRjaDMzQLcgJvLJuZZvRcEL",
"xprvA1RpRA33e1JQ7ifknakTFpgNXPmW2YvmhqLQYMmrj4xJXXWYpDPS3xz7iAxn8L39njGVyuoseXzU6rcxFLJ8HFsTjSyQbLYnMpCqE2VbFWc",
},
{
"test vector 2 chain m/0/2147483647H/1/2147483646H/2",
"fffcf9f6f3f0edeae7e4e1dedbd8d5d2cfccc9c6c3c0bdbab7b4b1aeaba8a5a29f9c999693908d8a8784817e7b7875726f6c696663605d5a5754514e4b484542",
[]uint32{0, HardenedKeyStart + 2147483647, 1, HardenedKeyStart + 2147483646, 2},
"xpub6FnCn6nSzZAw5Tw7cgR9bi15UV96gLZhjDstkXXxvCLsUXBGXPdSnLFbdpq8p9HmGsApME5hQTZ3emM2rnY5agb9rXpVGyy3bdW6EEgAtqt",
"xprvA2nrNbFZABcdryreWet9Ea4LvTJcGsqrMzxHx98MMrotbir7yrKCEXw7nadnHM8Dq38EGfSh6dqA9QWTyefMLEcBYJUuekgW4BYPJcr9E7j",
},
// Test vector 3
{
"test vector 3 chain m",
"4b381541583be4423346c643850da4b320e46a87ae3d2a4e6da11eba819cd4acba45d239319ac14f863b8d5ab5a0d0c64d2e8a1e7d1457df2e5a3c51c73235be",
[]uint32{},
"xpub661MyMwAqRbcEZVB4dScxMAdx6d4nFc9nvyvH3v4gJL378CSRZiYmhRoP7mBy6gSPSCYk6SzXPTf3ND1cZAceL7SfJ1Z3GC8vBgp2epUt13",
"xprv9s21ZrQH143K25QhxbucbDDuQ4naNntJRi4KUfWT7xo4EKsHt2QJDu7KXp1A3u7Bi1j8ph3EGsZ9Xvz9dGuVrtHHs7pXeTzjuxBrCmmhgC6",
},
{
"test vector 3 chain m/0H",
"4b381541583be4423346c643850da4b320e46a87ae3d2a4e6da11eba819cd4acba45d239319ac14f863b8d5ab5a0d0c64d2e8a1e7d1457df2e5a3c51c73235be",
[]uint32{HardenedKeyStart},
"xpub68NZiKmJWnxxS6aaHmn81bvJeTESw724CRDs6HbuccFQN9Ku14VQrADWgqbhhTHBaohPX4CjNLf9fq9MYo6oDaPPLPxSb7gwQN3ih19Zm4Y",
"xprv9uPDJpEQgRQfDcW7BkF7eTya6RPxXeJCqCJGHuCJ4GiRVLzkTXBAJMu2qaMWPrS7AANYqdq6vcBcBUdJCVVFceUvJFjaPdGZ2y9WACViL4L",
},
}
tests:
for i, test := range tests {
seed, err := hex.DecodeString(test.seed)
if err != nil {
t.Errorf("DecodeString #%d (%s): %v", i, test.name, err)
continue
}
extKey, err := NewMaster(seed)
if err != nil {
t.Errorf("NewMasterKey #%d (%s): %v", i, test.name, err)
continue
}
if !extKey.IsPrivate {
t.Error("Master node must feature private key")
continue
}
extKey, err = extKey.Derive(test.path)
if err != nil {
t.Errorf("cannot derive child: %v", err)
continue tests
}
privKeyStr := extKey.String()
if privKeyStr != test.privKey {
t.Errorf("%d (%s): private key mismatch (expects: %s, got: %s)", i, test.name, test.privKey, privKeyStr)
continue
} else {
t.Logf("test %d (%s): %s", i, test.name, extKey.String())
}
pubKey, err := extKey.Neuter()
if err != nil {
t.Errorf("failed to Neuter key #%d (%s): %v", i, test.name, err)
return
}
// neutering twice should have no effect
pubKey, err = pubKey.Neuter()
if err != nil {
t.Errorf("failed to Neuter key #%d (%s): %v", i, test.name, err)
return
}
pubKeyStr := pubKey.String()
if pubKeyStr != test.pubKey {
t.Errorf("%d (%s): public key mismatch (expects: %s, got: %s)", i, test.name, test.pubKey, pubKeyStr)
continue
} else {
t.Logf("test %d (%s, public): %s", i, test.name, extKey.String())
}
}
}
func TestChildDerivation(t *testing.T) {
type testCase struct {
name string
master string
path []uint32
wantKey string
}
// derive public keys from private keys
getPrivateChildDerivationTests := func() []testCase {
// The private extended keys for test vectors in [BIP32].
testVec1MasterPrivKey := masterPrivKey1
testVec2MasterPrivKey := masterPrivKey2
return []testCase{
// Test vector 1
{
name: "test vector 1 chain m",
master: testVec1MasterPrivKey,
path: []uint32{},
wantKey: masterPrivKey1,
},
{
name: "test vector 1 chain m/0",
master: testVec1MasterPrivKey,
path: []uint32{0},
wantKey: "xprv9uHRZZhbkedL37eZEnyrNsQPFZYRAvjy5rt6M1nbEkLSo378x1CQQLo2xxBvREwiK6kqf7GRNvsNEchwibzXaV6i5GcsgyjBeRguXhKsi4R",
},
{
name: "test vector 1 chain m/0/1",
master: testVec1MasterPrivKey,
path: []uint32{0, 1},
wantKey: "xprv9ww7sMFLzJMzy7bV1qs7nGBxgKYrgcm3HcJvGb4yvNhT9vxXC7eX7WVULzCfxucFEn2TsVvJw25hH9d4mchywguGQCZvRgsiRaTY1HCqN8G",
},
{
name: "test vector 1 chain m/0/1/2",
master: testVec1MasterPrivKey,
path: []uint32{0, 1, 2},
wantKey: "xprv9xrdP7iD2L1YZCgR9AecDgpDMZSTzP5KCfUykGXgjBxLgp1VFHsEeL3conzGAkbc1MigG1o8YqmfEA2jtkPdf4vwMaGJC2YSDbBTPAjfRUi",
},
{
name: "test vector 1 chain m/0/1/2/2",
master: testVec1MasterPrivKey,
path: []uint32{0, 1, 2, 2},
wantKey: "xprvA2J8Hq4eiP7xCEBP7gzRJGJnd9CHTkEU6eTNMrZ6YR7H5boik8daFtDZxmJDfdMSKHwroCfAfsBKWWidRfBQjpegy6kzXSkQGGoMdWKz5Xh",
},
{
name: "test vector 1 chain m/0/1/2/2/1000000000",
master: testVec1MasterPrivKey,
path: []uint32{0, 1, 2, 2, 1000000000},
wantKey: "xprvA3XhazxncJqJsQcG85Gg61qwPQKiobAnWjuPpjKhExprZjfse6nErRwTMwGe6uGWXPSykZSTiYb2TXAm7Qhwj8KgRd2XaD21Styu6h6AwFz",
},
// Test vector 2
{
name: "test vector 2 chain m",
master: testVec2MasterPrivKey,
path: []uint32{},
wantKey: masterPrivKey2,
},
{
name: "test vector 2 chain m/0",
master: testVec2MasterPrivKey,
path: []uint32{0},
wantKey: "xprv9vHkqa6EV4sPZHYqZznhT2NPtPCjKuDKGY38FBWLvgaDx45zo9WQRUT3dKYnjwih2yJD9mkrocEZXo1ex8G81dwSM1fwqWpWkeS3v86pgKt",
},
{
name: "test vector 2 chain m/0/2147483647",
master: testVec2MasterPrivKey,
path: []uint32{0, 2147483647},
wantKey: "xprv9wSp6B7cXJWXZRpDbxkFg3ry2fuSyUfvboJ5Yi6YNw7i1bXmq9QwQ7EwMpeG4cK2pnMqEx1cLYD7cSGSCtruGSXC6ZSVDHugMsZgbuY62m6",
},
{
name: "test vector 2 chain m/0/2147483647/1",
master: testVec2MasterPrivKey,
path: []uint32{0, 2147483647, 1},
wantKey: "xprv9ysS5br6UbWCRCJcggvpUNMyhVWgD7NypY9gsVTMYmuRtZg8izyYC5Ey4T931WgWbfJwRDwfVFqV3b29gqHDbuEpGcbzf16pdomk54NXkSm",
},
{
name: "test vector 2 chain m/0/2147483647/1/2147483646",
master: testVec2MasterPrivKey,
path: []uint32{0, 2147483647, 1, 2147483646},
wantKey: "xprvA2LfeWWwRCxh4iqigcDMnUf2E3nVUFkntc93nmUYBtb9rpSPYWa8MY3x9ZHSLZkg4G84UefrDruVK3FhMLSJsGtBx883iddHNuH1LNpRrEp",
},
{
name: "test vector 2 chain m/0/2147483647/1/2147483646/2",
master: testVec2MasterPrivKey,
path: []uint32{0, 2147483647, 1, 2147483646, 2},
wantKey: "xprvA48ALo8BDjcRET68R5RsPzF3H7WeyYYtHcyUeLRGBPHXu6CJSGjwW7dWoeUWTEzT7LG3qk6Eg6x2ZoqD8gtyEFZecpAyvchksfLyg3Zbqam",
},
// Custom tests to trigger specific conditions.
{
// Seed 000000000000000000000000000000da.
name: "Derived privkey with zero high byte m/0",
master: "xprv9s21ZrQH143K4FR6rNeqEK4EBhRgLjWLWhA3pw8iqgAKk82ypz58PXbrzU19opYcxw8JDJQF4id55PwTsN1Zv8Xt6SKvbr2KNU5y8jN8djz",
path: []uint32{0},
wantKey: "xprv9uC5JqtViMmgcAMUxcsBCBFA7oYCNs4bozPbyvLfddjHou4rMiGEHipz94xNaPb1e4f18TRoPXfiXx4C3cDAcADqxCSRSSWLvMBRWPctSN9",
},
}
}
// derive public keys from other public keys
getPublicChildDerivationTests := func() []testCase {
// The public extended keys for test vectors in [BIP32].
testVec1MasterPubKey := "xpub661MyMwAqRbcFtXgS5sYJABqqG9YLmC4Q1Rdap9gSE8NqtwybGhePY2gZ29ESFjqJoCu1Rupje8YtGqsefD265TMg7usUDFdp6W1EGMcet8"
testVec2MasterPubKey := "xpub661MyMwAqRbcFW31YEwpkMuc5THy2PSt5bDMsktWQcFF8syAmRUapSCGu8ED9W6oDMSgv6Zz8idoc4a6mr8BDzTJY47LJhkJ8UB7WEGuduB"
return []testCase{
// Test vector 1
{
name: "test vector 1 chain m",
master: testVec1MasterPubKey,
path: []uint32{},
wantKey: "xpub661MyMwAqRbcFtXgS5sYJABqqG9YLmC4Q1Rdap9gSE8NqtwybGhePY2gZ29ESFjqJoCu1Rupje8YtGqsefD265TMg7usUDFdp6W1EGMcet8",
},
{
name: "test vector 1 chain m/0",
master: testVec1MasterPubKey,
path: []uint32{0},
wantKey: "xpub68Gmy5EVb2BdFbj2LpWrk1M7obNuaPTpT5oh9QCCo5sRfqSHVYWex97WpDZzszdzHzxXDAzPLVSwybe4uPYkSk4G3gnrPqqkV9RyNzAcNJ1",
},
{
name: "test vector 1 chain m/0/1",
master: testVec1MasterPubKey,
path: []uint32{0, 1},
wantKey: "xpub6AvUGrnEpfvJBbfx7sQ89Q8hEMPM65UteqEX4yUbUiES2jHfjexmfJoxCGSwFMZiPBaKQT1RiKWrKfuDV4vpgVs4Xn8PpPTR2i79rwHd4Zr",
},
{
name: "test vector 1 chain m/0/1/2",
master: testVec1MasterPubKey,
path: []uint32{0, 1, 2},
wantKey: "xpub6BqyndF6rhZqmgktFCBcapkwubGxPqoAZtQaYewJHXVKZcLdnqBVC8N6f6FSHWUghjuTLeubWyQWfJdk2G3tGgvgj3qngo4vLTnnSjAZckv",
},
{
name: "test vector 1 chain m/0/1/2/2",
master: testVec1MasterPubKey,
path: []uint32{0, 1, 2, 2},
wantKey: "xpub6FHUhLbYYkgFQiFrDiXRfQFXBB2msCxKTsNyAExi6keFxQ8sHfwpogY3p3s1ePSpUqLNYks5T6a3JqpCGszt4kxbyq7tUoFP5c8KWyiDtPp",
},
{
name: "test vector 1 chain m/0/1/2/2/1000000000",
master: testVec1MasterPubKey,
path: []uint32{0, 1, 2, 2, 1000000000},
wantKey: "xpub6GX3zWVgSgPc5tgjE6ogT9nfwSADD3tdsxpzd7jJoJMqSY12Be6VQEFwDCp6wAQoZsH2iq5nNocHEaVDxBcobPrkZCjYW3QUmoDYzMFBDu9",
},
// Test vector 2
{
name: "test vector 2 chain m",
master: testVec2MasterPubKey,
path: []uint32{},
wantKey: "xpub661MyMwAqRbcFW31YEwpkMuc5THy2PSt5bDMsktWQcFF8syAmRUapSCGu8ED9W6oDMSgv6Zz8idoc4a6mr8BDzTJY47LJhkJ8UB7WEGuduB",
},
{
name: "test vector 2 chain m/0",
master: testVec2MasterPubKey,
path: []uint32{0},
wantKey: "xpub69H7F5d8KSRgmmdJg2KhpAK8SR3DjMwAdkxj3ZuxV27CprR9LgpeyGmXUbC6wb7ERfvrnKZjXoUmmDznezpbZb7ap6r1D3tgFxHmwMkQTPH",
},
{
name: "test vector 2 chain m/0/2147483647",
master: testVec2MasterPubKey,
path: []uint32{0, 2147483647},
wantKey: "xpub6ASAVgeWMg4pmutghzHG3BohahjwNwPmy2DgM6W9wGegtPrvNgjBwuZRD7hSDFhYfunq8vDgwG4ah1gVzZysgp3UsKz7VNjCnSUJJ5T4fdD",
},
{
name: "test vector 2 chain m/0/2147483647/1",
master: testVec2MasterPubKey,
path: []uint32{0, 2147483647, 1},
wantKey: "xpub6CrnV7NzJy4VdgP5niTpqWJiFXMAca6qBm5Hfsry77SQmN1HGYHnjsZSujoHzdxf7ZNK5UVrmDXFPiEW2ecwHGWMFGUxPC9ARipss9rXd4b",
},
{
name: "test vector 2 chain m/0/2147483647/1/2147483646",
master: testVec2MasterPubKey,
path: []uint32{0, 2147483647, 1, 2147483646},
wantKey: "xpub6FL2423qFaWzHCvBndkN9cbkn5cysiUeFq4eb9t9kE88jcmY63tNuLNRzpHPdAM4dUpLhZ7aUm2cJ5zF7KYonf4jAPfRqTMTRBNkQL3Tfta",
},
{
name: "test vector 2 chain m/0/2147483647/1/2147483646/2",
master: testVec2MasterPubKey,
path: []uint32{0, 2147483647, 1, 2147483646, 2},
wantKey: "xpub6H7WkJf547AiSwAbX6xsm8Bmq9M9P1Gjequ5SipsjipWmtXSyp4C3uwzewedGEgAMsDy4jEvNTWtxLyqqHY9C12gaBmgUdk2CGmwachwnWK",
},
}
}
runTests := func(tests []testCase) {
for i, test := range tests {
extKey, err := NewKeyFromString(test.master)
if err != nil {
t.Errorf("NewKeyFromString #%d (%s): unexpected error creating extended key: %v", i, test.name, err)
continue
}
extKey, err = extKey.Derive(test.path)
if err != nil {
t.Errorf("cannot derive child: %v", err)
continue
}
gotKey := extKey.String()
if gotKey != test.wantKey {
t.Errorf("Child #%d (%s): mismatched serialized extended key -- got: %s, want: %s", i, test.name, gotKey, test.wantKey)
continue
} else {
t.Logf("test %d (%s): %s", i, test.name, extKey.String())
}
}
}
runTests(getPrivateChildDerivationTests())
runTests(getPublicChildDerivationTests())
}
func TestErrors(t *testing.T) {
// Should get an error when seed has too few bytes.
_, err := NewMaster(bytes.Repeat([]byte{0x00}, 15))
if err != ErrInvalidSeedLen {
t.Errorf("NewMaster: mismatched error -- got: %v, want: %v",
err, ErrInvalidSeedLen)
}
// Should get an error when seed has too many bytes.
_, err = NewMaster(bytes.Repeat([]byte{0x00}, 65))
if err != ErrInvalidSeedLen {
t.Errorf("NewMaster: mismatched error -- got: %v, want: %v",
err, ErrInvalidSeedLen)
}
// Generate a new key and neuter it to a public extended key.
mnemonic := NewMnemonic()
phrase, err := mnemonic.MnemonicPhrase(128, EnglishLanguage)
if err != nil {
t.Errorf("Test failed: could not create seed: %s", err)
}
password := "badpassword"
extKey, err := NewMaster(mnemonic.MnemonicSeed(phrase, password))
if err != nil {
t.Errorf("unexpected error: %v", err)
return
}
pubKey, err := extKey.Neuter()
if err != nil {
t.Errorf("Neuter: unexpected error: %v", err)
return
}
// Deriving a hardened child extended key should fail from a public key.
_, err = pubKey.Child(HardenedKeyStart)
if err != ErrDerivingHardenedFromPublic {
t.Errorf("Child: mismatched error -- got: %v, want: %v", err, ErrDerivingHardenedFromPublic)
}
_, err = pubKey.BIP44Child(CoinTypeETH, 0)
if err != ErrInvalidMasterKey {
t.Errorf("BIP44Child: mistmatched error -- got: %v, want: %v", err, ErrInvalidMasterKey)
}
childKey, _ := extKey.Child(HardenedKeyStart + 1)
_, err = childKey.BIP44Child(CoinTypeETH, 0) // this should be called from master only
if err != ErrInvalidMasterKey {
t.Errorf("BIP44Child: mistmatched error -- got: %v, want: %v", err, ErrInvalidMasterKey)
}
// NewKeyFromString failure tests.
tests := []struct {
name string
key string
err error
neuter bool
neuterErr error
extKey *ExtendedKey
}{
{
name: "invalid key length",
key: "xpub1234",
err: ErrInvalidKeyLen,
},
{
name: "bad checksum",
key: "xpub661MyMwAqRbcFtXgS5sYJABqqG9YLmC4Q1Rdap9gSE8NqtwybGhePY2gZ29ESFjqJoCu1Rupje8YtGqsefD265TMg7usUDFdp6W1EBygr15",
err: ErrBadChecksum,
},
{
name: "pubkey not on curve",
key: "xpub661MyMwAqRbcFtXgS5sYJABqqG9YLmC4Q1Rdap9gSE8NqtwybGhePY2gZ1hr9Rwbk95YadvBkQXxzHBSngB8ndpW6QH7zhhsXZ2jHyZqPjk",
err: errors.New("pubkey isn't on secp256k1 curve"),
},
{
name: "unsupported version",
key: "xbad4LfUL9eKmA66w2GJdVMqhvDmYGJpTGjWRAtjHqoUY17sGaymoMV9Cm3ocn9Ud6Hh2vLFVC7KSKCRVVrqc6dsEdsTjRV1WUmkK85YEUujAPX",
err: nil,
neuter: true,
neuterErr: chaincfg.ErrUnknownHDKeyID,
},
{
name: "zeroed extended key",
key: EmptyExtendedKeyString,
err: nil,
neuter: false,
neuterErr: nil,
extKey: &ExtendedKey{},
},
{
name: "empty string",
key: "",
err: nil,
neuter: false,
neuterErr: nil,
extKey: &ExtendedKey{},
},
}
for i, test := range tests {
extKey, err := NewKeyFromString(test.key)
if !reflect.DeepEqual(err, test.err) {
t.Errorf("NewKeyFromString #%d (%s): mismatched error -- got: %v, want: %v", i, test.name, err, test.err)
continue
}
if test.neuter {
_, err := extKey.Neuter()
if !reflect.DeepEqual(err, test.neuterErr) {
t.Errorf("Neuter #%d (%s): mismatched error -- got: %v, want: %v", i, test.name, err, test.neuterErr)
continue
}
}
if test.extKey != nil {
if !reflect.DeepEqual(extKey, test.extKey) {
t.Errorf("ExtKey #%d (%s): mismatched extended key -- got: %+v, want: %+v", i, test.name, extKey, test.extKey)
continue
}
}
}
}
func TestMaxDepth(t *testing.T) {
mnemonic := NewMnemonic()
phrase, err := mnemonic.MnemonicPhrase(128, EnglishLanguage)
if err != nil {
t.Errorf("Test failed: could not create mnemonic phrase: %v", err)
}
lastParentKey, err := NewMaster(mnemonic.MnemonicSeed(phrase, "test-password"))
if err != nil {
t.Errorf("couldn't create master extended key: %v", err)
}
lastParentKey.Depth = 255
_, err = lastParentKey.Child(0)
if err != ErrMaxDepthExceeded {
t.Errorf("Expected ErrMaxDepthExceeded, got %+v", err)
}
}
func TestBIP44ChildDerivation(t *testing.T) {
keyString := masterPrivKey1
derivedKey1String := "xprvA38t8tFW4vbuB7WJXEqMFmZqRrcZUKWqqMcGjjKjr2hbfvPhRtLLJGL4ayWG8shF1VkuUikVGodGshLiKRS7WrdsrGSVDQCY33qoPBxG2Kp"
derivedKey2String := "xprvA38t8tFW4vbuDgBNpekPnuMSfpWziDLdF7W9Zd3mPy6eDEkM5F17vk59RtVoFbNdBBq84EJf5CqdZhhEoBkAM4DXHQsDqvUxVnncfnDQEFg"
extKey, err := NewKeyFromString(keyString)
if err != nil {
t.Error("NewKeyFromString: cannot create extended key")
}
accounKey1, err := extKey.BIP44Child(CoinTypeETH, 0)
if err != nil {
t.Error("Error dering BIP44-compliant key")
}
if accounKey1.String() != derivedKey1String {
t.Errorf("BIP44Child: key mismatch -- got: %v, want: %v", accounKey1.String(), derivedKey1String)
}
t.Logf("Account 1 key: %s", accounKey1.String())
accounKey2, err := extKey.BIP44Child(CoinTypeETH, 1)
if err != nil {
t.Error("Error dering BIP44-compliant key")
}
if accounKey2.String() != derivedKey2String {
t.Errorf("BIP44Child: key mismatch -- got: %v, want: %v", accounKey2.String(), derivedKey2String)
}
t.Logf("Account 1 key: %s", accounKey2.String())
}
func TestHDWalletCompatibility(t *testing.T) {
password := "TREZOR"
mnemonic := NewMnemonic()
mnemonicPhrase := "abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon about"
seed := mnemonic.MnemonicSeed(mnemonicPhrase, password)
rootKey, err := NewMaster(seed)
if err != nil {
t.Errorf("couldn't create master extended key: %v", err)
}
expectedAddresses := []struct {
address string
pubKey string
privKey string
}{
{
address: "0x9c32F71D4DB8Fb9e1A58B0a80dF79935e7256FA6",
pubKey: "0x03986dee3b8afe24cb8ccb2ac23dac3f8c43d22850d14b809b26d6b8aa5a1f4778",
privKey: "0x62f1d86b246c81bdd8f6c166d56896a4a5e1eddbcaebe06480e5c0bc74c28224",
},
{
address: "0x7AF7283bd1462C3b957e8FAc28Dc19cBbF2FAdfe",
pubKey: "0x03462e7b95dab24fe8a57ac897d9026545ec4327c9c5e4a772e5d14cc5422f9489",
privKey: "0x49ee230b1605382ac1c40079191bca937fc30e8c2fa845b7de27a96ffcc4ddbf",
},
{
address: "0x05f48E30fCb69ADcd2A591Ebc7123be8BE72D7a1",
pubKey: "0x036650e4b2b8e731a0ef12cda892b70cb95e78ea6e576ba995019b5e9aa7d9c0f5",
privKey: "0xeef2c0702151930b84cffcaa642af58e692956314519114e78f3211a6465f28b",
},
{
address: "0xbfE91Bc05cE66013660D7Eb742F74BD324DA5F92",
pubKey: "0x0201d1c12e8fcea03a68ad5fd0d02fd0a4bfe0339618f949e2e30cf311e8b83c46",
privKey: "0xbca51d1d3529a0e0787933a2293cf46d9b973ea3ea00e28d3bd33590bc7f7156",
},
}
for i := 0; i < len(expectedAddresses); i++ {
key, err := rootKey.BIP44Child(CoinTypeETH, uint32(i))
if err != nil {
t.Errorf("Error deriving BIP44-compliant key: %s", err)
}
privateKeyECDSA := key.ToECDSA()
address := crypto.PubkeyToAddress(privateKeyECDSA.PublicKey).Hex()
if address != expectedAddresses[i].address {
t.Errorf("wrong address generated. expected %s, got %s", expectedAddresses[i].address, address)
}
pubKey := fmt.Sprintf("0x%x", (crypto.CompressPubkey(&privateKeyECDSA.PublicKey)))
if pubKey != expectedAddresses[i].pubKey {
t.Errorf("wrong public key generated. expected %s, got %s", expectedAddresses[i].pubKey, pubKey)
}
privKey := fmt.Sprintf("0x%x", crypto.FromECDSA(privateKeyECDSA))
if privKey != expectedAddresses[i].privKey {
t.Errorf("wrong private key generated. expected %s, got %s", expectedAddresses[i].privKey, privKey)
}
}
}
// TestPrivateKeyDataWithLeadingZeros is a regression test that checks
// we don't re-introduce a bug we had in the past.
// For a specific mnemonic phrase, we were deriving a wrong key/address
// at path m/44'/60'/0'/0/0 compared to other wallets.
// In this specific case, the second child key is represented in 31 bytes.
// The problem raises when deriving its child key.
// One of the step to derive the child key is calling our splitHMAC
// that returns a secretKey and a chainCode.
// Inside this function we make a sha512 of a seed that is a 37 bytes with:
// 1 byte with 0x00
// 32 bytes for the key data
// 4 bytes for the child key index
// In our case, if the key was less then 32 bytes, it was shifted to the left of that 32 bytes space,
// resulting in a different seed, and a different data returned from the sha512 call.
// https://medium.com/@alexberegszaszi/why-do-my-bip32-wallets-disagree-6f3254cc5846#.86inuifuq
// https://github.com/iancoleman/bip39/issues/58
func TestPrivateKeyDataWithLeadingZeros(t *testing.T) {
mn := NewMnemonic()
words := "radar blur cabbage chef fix engine embark joy scheme fiction master release"
key, _ := NewMaster(mn.MnemonicSeed(words, ""))
path := []uint32{
HardenedKeyStart + 44, // purpose
HardenedKeyStart + 60, // cointype
HardenedKeyStart + 0, // account
0, // change
0, // index
}
for _, part := range path {
key, _ = key.Child(part)
if length := len(key.KeyData); length != 32 {
t.Errorf("expected key length to be 32, got: %d", length)
}
}
expectedAddress := "0xaC39b311DCEb2A4b2f5d8461c1cdaF756F4F7Ae9"
address := crypto.PubkeyToAddress(key.ToECDSA().PublicKey).Hex()
if address != expectedAddress {
t.Errorf("expected address %s, got: %s", expectedAddress, address)
}
}
//func TestNewKey(t *testing.T) {
// mnemonic := NewMnemonic()
//
// phrase, err := mnemonic.MnemonicPhrase(128, EnglishLanguage)
// if err != nil {
// t.Errorf("Test failed: could not create seed: %s", err)
// }
//
// password := "badpassword"
// mnemonic.salt = "Bitcoin seed"
// key, err := NewMaster(mnemonic.MnemonicSeed(phrase, password))
// if err != nil {
// t.Error(err)
// }
// t.Logf("%x", key.KeyData)
//}
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