1package babyjub
 2
 3import (
 4	"crypto/rand"
 5	"encoding/hex"
 6	"fmt"
 7
 8	"github.com/iden3/go-iden3-crypto/constants"
 9	"github.com/iden3/go-iden3-crypto/utils"
10	"github.com/stretchr/testify/assert"
11
12	"math/big"
13	"testing"
14)
15
16func genInputs() (*PrivateKey, *big.Int) {
17	k := NewRandPrivKey()
18	fmt.Println("k", hex.EncodeToString(k[:]))
19
20	msgBuf := [32]byte{}
21	rand.Read(msgBuf[:])
22	msg := utils.SetBigIntFromLEBytes(new(big.Int), msgBuf[:])
23	msg.Mod(msg, constants.Q)
24	fmt.Println("msg", msg)
25
26	return &k, msg
27}
28
29func TestSignVerify1(t *testing.T) {
30	var k PrivateKey
31	hex.Decode(k[:], []byte("0001020304050607080900010203040506070809000102030405060708090001"))
32	msgBuf, err := hex.DecodeString("00010203040506070809")
33	if err != nil {
34		panic(err)
35	}
36	msg := utils.SetBigIntFromLEBytes(new(big.Int), msgBuf)
37
38	pk := k.Public()
39	assert.Equal(t,
40		"13277427435165878497778222415993513565335242147425444199013288855685581939618",
41		pk.X.String())
42	assert.Equal(t,
43		"13622229784656158136036771217484571176836296686641868549125388198837476602820",
44		pk.Y.String())
45
46	sig := k.SignMimc7(msg)
47	assert.Equal(t,
48		"11384336176656855268977457483345535180380036354188103142384839473266348197733",
49		sig.R8.X.String())
50	assert.Equal(t,
51		"15383486972088797283337779941324724402501462225528836549661220478783371668959",
52		sig.R8.Y.String())
53	assert.Equal(t,
54		"2523202440825208709475937830811065542425109372212752003460238913256192595070",
55		sig.S.String())
56
57	ok := pk.VerifyMimc7(msg, sig)
58	assert.Equal(t, true, ok)
59
60	sigBuf := sig.Compress()
61	sig2, err := new(Signature).Decompress(sigBuf)
62	assert.Equal(t, nil, err)
63
64	assert.Equal(t, ""+
65		"dfedb4315d3f2eb4de2d3c510d7a987dcab67089c8ace06308827bf5bcbe02a2"+
66		"7ed40dab29bf993c928e789d007387998901a24913d44fddb64b1f21fc149405",
67		hex.EncodeToString(sigBuf[:]))
68
69	ok = pk.VerifyMimc7(msg, sig2)
70	assert.Equal(t, true, ok)
71}
72
73func TestCompressDecompress(t *testing.T) {
74	var k PrivateKey
75	hex.Decode(k[:], []byte("0001020304050607080900010203040506070809000102030405060708090001"))
76	pk := k.Public()
77	for i := 0; i < 64; i++ {
78		msgBuf, err := hex.DecodeString(fmt.Sprintf("000102030405060708%02d", i))
79		if err != nil {
80			panic(err)
81		}
82		msg := utils.SetBigIntFromLEBytes(new(big.Int), msgBuf)
83		sig := k.SignMimc7(msg)
84		sigBuf := sig.Compress()
85		sig2, err := new(Signature).Decompress(sigBuf)
86		assert.Equal(t, nil, err)
87		ok := pk.VerifyMimc7(msg, sig2)
88		assert.Equal(t, true, ok)
89	}
90}