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crypto/secp256k1: remove external LGPL dependencies (#17239)

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This commit is contained in:
Péter Szilágyi
2018-07-26 14:33:13 +03:00
committed by Felix Lange
parent 11a402f747
commit d9575e92fc
4 changed files with 69 additions and 72 deletions
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39
crypto/secp256k1/secp256_test.go
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@ -10,10 +10,8 @@ import (
"crypto/elliptic"
"crypto/rand"
"encoding/hex"
"io"
"testing"
"github.com/ethereum/go-ethereum/common/math"
"github.com/ethereum/go-ethereum/crypto/randentropy"
)
const TestCount = 1000
@ -24,11 +22,24 @@ func generateKeyPair() (pubkey, privkey []byte) {
panic(err)
}
pubkey = elliptic.Marshal(S256(), key.X, key.Y)
return pubkey, math.PaddedBigBytes(key.D, 32)
privkey = make([]byte, 32)
blob := key.D.Bytes()
copy(privkey[32-len(blob):], blob)
return pubkey, privkey
}
func csprngEntropy(n int) []byte {
buf := make([]byte, n)
if _, err := io.ReadFull(rand.Reader, buf); err != nil {
panic("reading from crypto/rand failed: " + err.Error())
}
return buf
}
func randSig() []byte {
sig := randentropy.GetEntropyCSPRNG(65)
sig := csprngEntropy(65)
sig[32] &= 0x70
sig[64] %= 4
return sig
@ -51,7 +62,7 @@ func compactSigCheck(t *testing.T, sig []byte) {
func TestSignatureValidity(t *testing.T) {
pubkey, seckey := generateKeyPair()
msg := randentropy.GetEntropyCSPRNG(32)
msg := csprngEntropy(32)
sig, err := Sign(msg, seckey)
if err != nil {
t.Errorf("signature error: %s", err)
@ -74,7 +85,7 @@ func TestSignatureValidity(t *testing.T) {
func TestInvalidRecoveryID(t *testing.T) {
_, seckey := generateKeyPair()
msg := randentropy.GetEntropyCSPRNG(32)
msg := csprngEntropy(32)
sig, _ := Sign(msg, seckey)
sig[64] = 99
_, err := RecoverPubkey(msg, sig)
@ -85,7 +96,7 @@ func TestInvalidRecoveryID(t *testing.T) {
func TestSignAndRecover(t *testing.T) {
pubkey1, seckey := generateKeyPair()
msg := randentropy.GetEntropyCSPRNG(32)
msg := csprngEntropy(32)
sig, err := Sign(msg, seckey)
if err != nil {
t.Errorf("signature error: %s", err)
@ -136,7 +147,7 @@ func TestRandomMessagesWithRandomKeys(t *testing.T) {
func signAndRecoverWithRandomMessages(t *testing.T, keys func() ([]byte, []byte)) {
for i := 0; i < TestCount; i++ {
pubkey1, seckey := keys()
msg := randentropy.GetEntropyCSPRNG(32)
msg := csprngEntropy(32)
sig, err := Sign(msg, seckey)
if err != nil {
t.Fatalf("signature error: %s", err)
@ -164,7 +175,7 @@ func signAndRecoverWithRandomMessages(t *testing.T, keys func() ([]byte, []byte)
func TestRecoveryOfRandomSignature(t *testing.T) {
pubkey1, _ := generateKeyPair()
msg := randentropy.GetEntropyCSPRNG(32)
msg := csprngEntropy(32)
for i := 0; i < TestCount; i++ {
// recovery can sometimes work, but if so should always give wrong pubkey
@ -177,11 +188,11 @@ func TestRecoveryOfRandomSignature(t *testing.T) {
func TestRandomMessagesAgainstValidSig(t *testing.T) {
pubkey1, seckey := generateKeyPair()
msg := randentropy.GetEntropyCSPRNG(32)
msg := csprngEntropy(32)
sig, _ := Sign(msg, seckey)
for i := 0; i < TestCount; i++ {
msg = randentropy.GetEntropyCSPRNG(32)
msg = csprngEntropy(32)
pubkey2, _ := RecoverPubkey(msg, sig)
// recovery can sometimes work, but if so should always give wrong pubkey
if bytes.Equal(pubkey1, pubkey2) {
@ -207,7 +218,7 @@ func TestRecoverSanity(t *testing.T) {
func BenchmarkSign(b *testing.B) {
_, seckey := generateKeyPair()
msg := randentropy.GetEntropyCSPRNG(32)
msg := csprngEntropy(32)
b.ResetTimer()
for i := 0; i < b.N; i++ {
@ -216,7 +227,7 @@ func BenchmarkSign(b *testing.B) {
}
func BenchmarkRecover(b *testing.B) {
msg := randentropy.GetEntropyCSPRNG(32)
msg := csprngEntropy(32)
_, seckey := generateKeyPair()
sig, _ := Sign(msg, seckey)
b.ResetTimer()