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package babyjub
import (
"crypto/rand"
"encoding/hex"
"fmt"
"math/big"
"testing"
"github.com/iden3/go-iden3-crypto/constants"
"github.com/iden3/go-iden3-crypto/utils"
"github.com/stretchr/testify/assert"
)
func genInputs() (*PrivateKey, *big.Int) {
k := NewRandPrivKey()
fmt.Println("k", hex.EncodeToString(k[:]))
msgBuf := [32]byte{}
rand.Read(msgBuf[:])
msg := utils.SetBigIntFromLEBytes(new(big.Int), msgBuf[:])
msg.Mod(msg, constants.Q)
fmt.Println("msg", msg)
return &k, msg
}
func TestPublicKey(t *testing.T) {
var k PrivateKey
for i := 0; i < 256; i++ {
hex.Decode(k[:], []byte{byte(i)})
}
pk := k.Public()
assert.True(t, pk.X.BigInt().Cmp(constants.Q) == -1)
assert.True(t, pk.Y.BigInt().Cmp(constants.Q) == -1)
}
func TestSignVerifyMimc7(t *testing.T) {
var k PrivateKey
hex.Decode(k[:], []byte("0001020304050607080900010203040506070809000102030405060708090001"))
msgBuf, err := hex.DecodeString("00010203040506070809")
if err != nil {
panic(err)
}
msg := utils.SetBigIntFromLEBytes(new(big.Int), msgBuf)
pk := k.Public()
assert.Equal(t,
"13277427435165878497778222415993513565335242147425444199013288855685581939618",
pk.X.String())
assert.Equal(t,
"13622229784656158136036771217484571176836296686641868549125388198837476602820",
pk.Y.String())
sig := k.SignMimc7(msg)
assert.Equal(t,
"11384336176656855268977457483345535180380036354188103142384839473266348197733",
sig.R8.X.String())
assert.Equal(t,
"15383486972088797283337779941324724402501462225528836549661220478783371668959",
sig.R8.Y.String())
assert.Equal(t,
"2523202440825208709475937830811065542425109372212752003460238913256192595070",
sig.S.String())
ok := pk.VerifyMimc7(msg, sig)
assert.Equal(t, true, ok)
sigBuf := sig.Compress()
sig2, err := new(Signature).Decompress(sigBuf)
assert.Equal(t, nil, err)
assert.Equal(t, ""+
"dfedb4315d3f2eb4de2d3c510d7a987dcab67089c8ace06308827bf5bcbe02a2"+
"7ed40dab29bf993c928e789d007387998901a24913d44fddb64b1f21fc149405",
hex.EncodeToString(sigBuf[:]))
ok = pk.VerifyMimc7(msg, sig2)
assert.Equal(t, true, ok)
}
func TestSignVerifyPoseidon(t *testing.T) {
var k PrivateKey
hex.Decode(k[:], []byte("0001020304050607080900010203040506070809000102030405060708090001"))
msgBuf, err := hex.DecodeString("00010203040506070809")
if err != nil {
panic(err)
}
msg := utils.SetBigIntFromLEBytes(new(big.Int), msgBuf)
pk := k.Public()
assert.Equal(t,
"13277427435165878497778222415993513565335242147425444199013288855685581939618",
pk.X.String())
assert.Equal(t,
"13622229784656158136036771217484571176836296686641868549125388198837476602820",
pk.Y.String())
sig := k.SignPoseidon(msg)
assert.Equal(t,
"11384336176656855268977457483345535180380036354188103142384839473266348197733",
sig.R8.X.String())
assert.Equal(t,
"15383486972088797283337779941324724402501462225528836549661220478783371668959",
sig.R8.Y.String())
assert.Equal(t,
"248298168863866362217836334079793350221620631973732197668910946177382043688",
sig.S.String())
ok := pk.VerifyPoseidon(msg, sig)
assert.Equal(t, true, ok)
sigBuf := sig.Compress()
sig2, err := new(Signature).Decompress(sigBuf)
assert.Equal(t, nil, err)
assert.Equal(t, ""+
"dfedb4315d3f2eb4de2d3c510d7a987dcab67089c8ace06308827bf5bcbe02a2"+
"28506bce274aa1b3f7e7c2fd7e4fe09bff8f9aa37a42def7994e98f322888c00",
hex.EncodeToString(sigBuf[:]))
ok = pk.VerifyPoseidon(msg, sig2)
assert.Equal(t, true, ok)
}
func TestCompressDecompress(t *testing.T) {
var k PrivateKey
hex.Decode(k[:], []byte("0001020304050607080900010203040506070809000102030405060708090001"))
pk := k.Public()
for i := 0; i < 64; i++ {
msgBuf, err := hex.DecodeString(fmt.Sprintf("000102030405060708%02d", i))
if err != nil {
panic(err)
}
msg := utils.SetBigIntFromLEBytes(new(big.Int), msgBuf)
sig := k.SignMimc7(msg)
sigBuf := sig.Compress()
sig2, err := new(Signature).Decompress(sigBuf)
assert.Equal(t, nil, err)
ok := pk.VerifyMimc7(msg, sig2)
assert.Equal(t, true, ok)
}
}
func BenchmarkBabyjubEddsa(b *testing.B) {
var k PrivateKey
hex.Decode(k[:], []byte("0001020304050607080900010203040506070809000102030405060708090001"))
pk := k.Public()
const n = 256
msgBuf, err := hex.DecodeString("00010203040506070809")
if err != nil {
panic(err)
}
msg := utils.SetBigIntFromLEBytes(new(big.Int), msgBuf)
var msgs [n]*big.Int
for i := 0; i < n; i++ {
msgs[i] = new(big.Int).Add(msg, big.NewInt(int64(i)))
}
var sigs [n]*Signature
b.Run("SignMimc7", func(b *testing.B) {
for i := 0; i < b.N; i++ {
k.SignMimc7(msgs[i%n])
}
})
for i := 0; i < n; i++ {
sigs[i%n] = k.SignMimc7(msgs[i%n])
}
b.Run("VerifyMimc7", func(b *testing.B) {
for i := 0; i < b.N; i++ {
pk.VerifyMimc7(msgs[i%n], sigs[i%n])
}
})
b.Run("SignPoseidon", func(b *testing.B) {
for i := 0; i < b.N; i++ {
k.SignPoseidon(msgs[i%n])
}
})
for i := 0; i < n; i++ {
sigs[i%n] = k.SignPoseidon(msgs[i%n])
}
b.Run("VerifyPoseidon", func(b *testing.B) {
for i := 0; i < b.N; i++ {
pk.VerifyPoseidon(msgs[i%n], sigs[i%n])
}
})
}