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arnaucube
2020-12-16 15:04:43 +01:00
parent 821a601d20
commit 6d75396b4b
14 changed files with 203 additions and 113 deletions
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14
mimc7/mimc7.go
View File

@@ -10,6 +10,7 @@ import (
"github.com/iden3/go-iden3-crypto/utils"
)
// SEED defines the seed used to constants
const SEED = "mimc"
var constants = generateConstantsData()
@@ -47,8 +48,9 @@ func getConstants(seed string, nRounds int) []*ff.Element {
return cts
}
// MIMC7HashGeneric performs the MIMC7 hash over a *big.Int, in a generic way, where it can be specified the Finite Field over R, and the number of rounds
func MIMC7HashGeneric(xInBI, kBI *big.Int, nRounds int) *big.Int {
// MIMC7HashGeneric performs the MIMC7 hash over a *big.Int, in a generic way,
// where it can be specified the Finite Field over R, and the number of rounds
func MIMC7HashGeneric(xInBI, kBI *big.Int, nRounds int) *big.Int { //nolint:golint
xIn := ff.NewElement().SetBigInt(xInBI)
k := ff.NewElement().SetBigInt(kBI)
@@ -72,7 +74,8 @@ func MIMC7HashGeneric(xInBI, kBI *big.Int, nRounds int) *big.Int {
return res
}
// HashGeneric performs the MIMC7 hash over a *big.Int array, in a generic way, where it can be specified the Finite Field over R, and the number of rounds
// HashGeneric performs the MIMC7 hash over a *big.Int array, in a generic way,
// where it can be specified the Finite Field over R, and the number of rounds
func HashGeneric(iv *big.Int, arr []*big.Int, nRounds int) (*big.Int, error) {
if !utils.CheckBigIntArrayInField(arr) {
return nil, errors.New("inputs values not inside Finite Field")
@@ -88,8 +91,9 @@ func HashGeneric(iv *big.Int, arr []*big.Int, nRounds int) (*big.Int, error) {
return r, nil
}
// MIMC7Hash performs the MIMC7 hash over a *big.Int, using the Finite Field over R and the number of rounds setted in the `constants` variable
func MIMC7Hash(xInBI, kBI *big.Int) *big.Int {
// MIMC7Hash performs the MIMC7 hash over a *big.Int, using the Finite Field
// over R and the number of rounds setted in the `constants` variable
func MIMC7Hash(xInBI, kBI *big.Int) *big.Int { //nolint:golint
xIn := ff.NewElement().SetBigInt(xInBI)
k := ff.NewElement().SetBigInt(kBI)

39
mimc7/mimc7_test.go
View File

@@ -11,9 +11,13 @@ import (
func TestKeccak256(t *testing.T) {
res := crypto.Keccak256([]byte(SEED))
assert.Equal(t, "b6e489e6b37224a50bebfddbe7d89fa8fdcaa84304a70bd13f79b5d9f7951e9e", hex.EncodeToString(res))
assert.Equal(t,
"b6e489e6b37224a50bebfddbe7d89fa8fdcaa84304a70bd13f79b5d9f7951e9e",
hex.EncodeToString(res))
c := new(big.Int).SetBytes(crypto.Keccak256([]byte(SEED)))
assert.Equal(t, "82724731331859054037315113496710413141112897654334566532528783843265082629790", c.String())
assert.Equal(t,
"82724731331859054037315113496710413141112897654334566532528783843265082629790",
c.String())
}
func TestMIMC7Generic(t *testing.T) {
@@ -25,10 +29,14 @@ func TestMIMC7Generic(t *testing.T) {
// Generic Hash
mhg := MIMC7HashGeneric(b1, b2, 91)
assert.Equal(t, "10594780656576967754230020536574539122676596303354946869887184401991294982664", mhg.String())
assert.Equal(t,
"10594780656576967754230020536574539122676596303354946869887184401991294982664",
mhg.String())
hg, err := HashGeneric(big.NewInt(0), bigArray, 91)
assert.Nil(t, err)
assert.Equal(t, "6464402164086696096195815557694604139393321133243036833927490113253119343397", (*big.Int)(hg).String())
assert.Equal(t,
"6464402164086696096195815557694604139393321133243036833927490113253119343397",
(*big.Int)(hg).String())
}
func TestMIMC7(t *testing.T) {
@@ -43,7 +51,8 @@ func TestMIMC7(t *testing.T) {
h1, err := Hash(bigArray1, nil)
assert.Nil(t, err)
// same hash value than the iden3js and circomlib tests:
assert.Equal(t, "0x"+hex.EncodeToString((*big.Int)(h1).Bytes()), "0x237c92644dbddb86d8a259e0e923aaab65a93f1ec5758b8799988894ac0958fd")
assert.Equal(t, "0x"+hex.EncodeToString((*big.Int)(h1).Bytes()),
"0x237c92644dbddb86d8a259e0e923aaab65a93f1ec5758b8799988894ac0958fd")
// h2a, hash of 2 elements
bigArray2a := []*big.Int{b78, b41}
@@ -51,19 +60,22 @@ func TestMIMC7(t *testing.T) {
h2a, err := Hash(bigArray2a, nil)
assert.Nil(t, err)
// same hash value than the iden3js and circomlib tests:
assert.Equal(t, "0x"+hex.EncodeToString((*big.Int)(h2a).Bytes()), "0x067f3202335ea256ae6e6aadcd2d5f7f4b06a00b2d1e0de903980d5ab552dc70")
assert.Equal(t, "0x"+hex.EncodeToString((*big.Int)(h2a).Bytes()),
"0x067f3202335ea256ae6e6aadcd2d5f7f4b06a00b2d1e0de903980d5ab552dc70")
// h2b, hash of 2 elements
bigArray2b := []*big.Int{b12, b45}
mh2b := MIMC7Hash(b12, b45)
assert.Nil(t, err)
assert.Equal(t, "0x"+hex.EncodeToString((*big.Int)(mh2b).Bytes()), "0x2ba7ebad3c6b6f5a20bdecba2333c63173ca1a5f2f49d958081d9fa7179c44e4")
assert.Equal(t, "0x"+hex.EncodeToString((*big.Int)(mh2b).Bytes()),
"0x2ba7ebad3c6b6f5a20bdecba2333c63173ca1a5f2f49d958081d9fa7179c44e4")
h2b, err := Hash(bigArray2b, nil)
assert.Nil(t, err)
// same hash value than the iden3js and circomlib tests:
assert.Equal(t, "0x"+hex.EncodeToString((*big.Int)(h2b).Bytes()), "0x15ff7fe9793346a17c3150804bcb36d161c8662b110c50f55ccb7113948d8879")
assert.Equal(t, "0x"+hex.EncodeToString((*big.Int)(h2b).Bytes()),
"0x15ff7fe9793346a17c3150804bcb36d161c8662b110c50f55ccb7113948d8879")
// h4, hash of 4 elements
bigArray4 := []*big.Int{b12, b45, b78, b41}
@@ -71,11 +83,14 @@ func TestMIMC7(t *testing.T) {
h4, err := Hash(bigArray4, nil)
assert.Nil(t, err)
// same hash value than the iden3js and circomlib tests:
assert.Equal(t, "0x"+hex.EncodeToString((*big.Int)(h4).Bytes()), "0x284bc1f34f335933a23a433b6ff3ee179d682cd5e5e2fcdd2d964afa85104beb")
assert.Equal(t, "0x"+hex.EncodeToString((*big.Int)(h4).Bytes()),
"0x284bc1f34f335933a23a433b6ff3ee179d682cd5e5e2fcdd2d964afa85104beb")
msg := []byte("Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.")
msg := []byte("Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.") //nolint:lll
hmsg := HashBytes(msg)
assert.Equal(t, "16855787120419064316734350414336285711017110414939748784029922801367685456065", hmsg.String())
assert.Equal(t,
"16855787120419064316734350414336285711017110414939748784029922801367685456065",
hmsg.String())
}
func BenchmarkMIMC7(b *testing.B) {
@@ -86,6 +101,6 @@ func BenchmarkMIMC7(b *testing.B) {
bigArray4 := []*big.Int{b12, b45, b78, b41}
for i := 0; i < b.N; i++ {
Hash(bigArray4, nil) //nolint:errcheck
Hash(bigArray4, nil) //nolint:errcheck,gosec
}
}