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Merge pull request #11 from iden3/fix/issue-9

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Fix/issue #9
This commit is contained in:
Eduard S
2019-12-18 11:03:37 +01:00
committed by GitHub
parent 7c6170453e c754d01ce0
commit 8d5a7a7ccb
2 changed files with 11 additions and 10 deletions
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15
poseidon/poseidon.go
View File

@@ -101,7 +101,7 @@ func checkAllDifferent(v []*big.Int) bool {
// ark computes Add-Round Key, from the paper https://eprint.iacr.org/2019/458.pdf // ark computes Add-Round Key, from the paper https://eprint.iacr.org/2019/458.pdf
func ark(state []*big.Int, c *big.Int) []*big.Int { func ark(state []*big.Int, c *big.Int) []*big.Int {
for i := 0; i < len(state); i++ { for i := 0; i < T; i++ {
state[i] = constants.fqR.Add(state[i], c) state[i] = constants.fqR.Add(state[i], c)
} }
return state return state
@@ -167,16 +167,17 @@ func Hash(arr []*big.Int) (*big.Int, error) {
} }
r := constants.fqR.Zero() r := constants.fqR.Zero()
for i := 0; i < len(arr); i = i + 5 { for i := 0; i < len(arr); i = i + T - 1 {
var fiveElems [5]*big.Int var toHash [T]*big.Int
for j := 0; j < 5; j++ { for j := 0; j < T-1; j++ {
if i+j < len(arr) { if i+j < len(arr) {
fiveElems[j] = arr[i+j] toHash[j] = arr[i+j]
} else { } else {
fiveElems[j] = _constants.Zero toHash[j] = _constants.Zero
} }
} }
ph, err := PoseidonHash(fiveElems[:]) toHash[T-1] = r
ph, err := PoseidonHash(toHash[:])
if err != nil { if err != nil {
return nil, err return nil, err
} }

6
poseidon/poseidon_test.go
View File

@@ -43,7 +43,7 @@ func TestPoseidon(t *testing.T) {
} }
hmsg, err := Hash(msgElems) hmsg, err := Hash(msgElems)
assert.Nil(t, err) assert.Nil(t, err)
assert.Equal(t, "11821124228916291136371255062457365369197326845706357273715164664419275913793", hmsg.String()) assert.Equal(t, "19204466598658860237115179437116112945222240370078952939676636700594938553268", hmsg.String())
msg2 := []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. Lorem ipsum dolor sit amet.") msg2 := []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. Lorem ipsum dolor sit amet.")
msg2Elems := make([]*big.Int, 0, len(msg2)/n+1) msg2Elems := make([]*big.Int, 0, len(msg2)/n+1)
@@ -59,11 +59,11 @@ func TestPoseidon(t *testing.T) {
} }
hmsg2, err := Hash(msg2Elems) hmsg2, err := Hash(msg2Elems)
assert.Nil(t, err) assert.Nil(t, err)
assert.Equal(t, "10747013384255785702102976082726575658403084163954725275481577373644732938016", hmsg2.String()) assert.Equal(t, "11846976426841208067103690249139614816718727366915557488657094868020932500524", hmsg2.String())
hmsg2, err = HashBytes(msg2) hmsg2, err = HashBytes(msg2)
assert.Nil(t, err) assert.Nil(t, err)
assert.Equal(t, "10747013384255785702102976082726575658403084163954725275481577373644732938016", hmsg2.String()) assert.Equal(t, "11846976426841208067103690249139614816718727366915557488657094868020932500524", hmsg2.String())
} }
func TestPoseidonBrokenChunks(t *testing.T) { func TestPoseidonBrokenChunks(t *testing.T) {