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63 lines
1.4 KiB
63 lines
1.4 KiB
package main
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import (
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"crypto/ecdsa"
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"math/big"
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"testing"
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"github.com/arnaucube/go-blindsecp256k1"
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"github.com/btcsuite/btcd/btcec"
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"github.com/stretchr/testify/require"
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"gotest.tools/assert"
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)
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func calculateKeysFromK(t *testing.T, k *big.Int) (*btcec.PublicKey, *blindsecp256k1.PublicKey) {
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curve := btcec.S256()
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x, y := curve.ScalarBaseMult(k.Bytes())
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skEth := (*btcec.PrivateKey)(&ecdsa.PrivateKey{
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PublicKey: ecdsa.PublicKey{
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Curve: curve,
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X: x,
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Y: y,
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},
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D: k,
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})
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pkEthAux := (*btcec.PublicKey)(&skEth.PublicKey)
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pkEth := skEth.PubKey()
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assert.Equal(t, pkEth, pkEthAux)
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skBlind := blindsecp256k1.PrivateKey(*k)
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pkBlind := skBlind.Public()
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return pkEth, pkBlind
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}
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func TestCompatibleKeys(t *testing.T) {
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// using incremental k
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for i := 0; i < 10000; i++ {
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k := big.NewInt(int64(i))
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pkEth, pkBlind := calculateKeysFromK(t, k)
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assert.Equal(t, pkEth.X.String(), pkBlind.X.String())
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assert.Equal(t, pkEth.Y.String(), pkBlind.Y.String())
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// fmt.Println("k", k)
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// fmt.Println(pkEth)
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// fmt.Println(pkBlind)
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}
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// using random k
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for i := 0; i < 10000; i++ {
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kaux, err := btcec.NewPrivateKey(btcec.S256())
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require.NoError(t, err)
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k := kaux.D
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pkEth, pkBlind := calculateKeysFromK(t, k)
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assert.Equal(t, pkEth.X.String(), pkBlind.X.String())
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assert.Equal(t, pkEth.Y.String(), pkBlind.Y.String())
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// fmt.Println("k", k)
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// fmt.Println(pkEth)
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// fmt.Println(pkBlind)
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}
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}
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