add test for poseidon hash writer; rename methods

babyjub/babyjub_wrapper_test.go

@@ -39,7 +39,7 @@ func TestBjjWrappedPrivateKey(t *testing.T) {
 	pub, ok := pk.Public().(*BjjWrappedPublicKey)
 	require.True(t, ok)
 
-	decomrpessSig, err := decomrpessSig(sig)
+	decomrpessSig, err := DecompressSig(sig)
 	require.NoError(t, err)
 
 	digestBI := big.NewInt(0).SetBytes(digest)
@@ -64,7 +64,8 @@ func TestBjjWrappedPublicKeyEqual(t *testing.T) {
 	require.False(t, x1.Equal(x2))
 }
 
-func decomrpessSig(commpresedSig []byte) (*Signature, error) {
+// DecompressSig decompresses a compressed signature.
+func DecompressSig(commpresedSig []byte) (*Signature, error) {
 	poseidonComSig := &SignatureComp{}
 	if err := poseidonComSig.UnmarshalText(commpresedSig); err != nil {
 		return nil, err

poseidon/poseidon_wrapper.go

@@ -11,9 +11,9 @@ type digest struct {
 	frameSize int
 }
 
-// NewPoseidon returns the Poseidon hash of the input bytes.
+// Sum returns the Poseidon hash of the input bytes.
 // use frame size of 16 inputs by default
-func NewPoseidon(b []byte) []byte {
+func Sum(b []byte) []byte {
 	h, _ := New(16)
 	h.Write(b)
 	return h.Sum(nil)

poseidon/poseidon_wrapper_test.go

@@ -117,10 +117,367 @@ func TestPoseidonNewPoseidon(t *testing.T) {
 			inputBytes, err := hex.DecodeString(vector.bytes)
 			require.NoError(t, err)
 
-			res := NewPoseidon(inputBytes)
+			res := Sum(inputBytes)
 
 			require.NotEmpty(t, res)
 			require.Equal(t, vector.expectedHash, hex.EncodeToString(res))
 		})
 	}
 }
+
+func TestPoseidonWithChunkWriter(t *testing.T) {
+	type testVector struct {
+		bytesChunks  []string
+		expectedHash string
+	}
+
+	var testVectors = []testVector{
+		{
+			bytesChunks:  []string{"de", "ad"},
+			expectedHash: "0244ec1a137a24c92404de9f9c39907be151026a4eb7f9cfea60a5740e8a73b7",
+		},
+		{
+			bytesChunks:  []string{"ce0e8e502600b14bb0a2c9689f", "7d93d10e9f5451f18f030ec3bb6c5001ea60"},
+			expectedHash: "03ace829d65dae7903fc9b22e904750ca0509b9a187cbeb004a4270e8322a2f4",
+		},
+		{
+			bytesChunks:  []string{"34665289b71a2cb8", "bf4c289ae6d17d84", "5457c48bfc18623c", "a39e141b2e40c5d3"},
+			expectedHash: "144aa8e107a9fd8f8106016a8ff0fd1c265cdf31a40a8ef9ed44dfb4592cbbff",
+		},
+		{
+			bytesChunks: []string{
+				"60806040523480156200001157600080fd5b506040516200210338",
+				"0380620021038339810160408190526200003491620002e1565b62",
+				"00003f3362000125565b60005b620000506001602062000329565b",
+				"811015620000eb57602181602081106200006e576200006e620003",
+				"43565b01546021826020811062000086576200008662000343565b",
+				"015460408051602081019390935282015260600160405160208183",
+				"0303815290604052805190602001206021826001620000c1919062",
+				"000359565b60208110620000d457620000d462000343565b015580",
+				"620000e28162000374565b91505062000042565b50604680546001",
+				"600160a01b0319166001600160a01b038316179055620001116200",
+				"0175565b6043556200011e62000250565b50620003b5565b600080",
+				"546001600160a01b038381166001600160a01b0319831681178455",
+				"604051919092169283917f8be0079c531659141344cd1fd0a4f284",
+				"19497f9722a3daafe3b4186f6b6457e09190a35050565b60415460",
+				"00908190815b602081101562000248578160011660011415620001",
+				"e05760018160208110620001ac57620001ac62000343565b015460",
+				"408051602081019290925281018490526060016040516020818303",
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+				"208110620001f757620001f762000343565b015460408051602081",
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+				"51906020012092505b6200023160028362000392565b9150806200",
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+				"1681146106f557600080fd5b803563ffffffff8116811461170957",
+				"600080fd5b919050565b6000806000806080858703121561172457",
+				"600080fd5b843561172f816116d3565b9350602085013592506117",
+				"44604086016116f5565b91506060850135611754816116d3565b93",
+				"9692955090935050565b60006020828403121561177157600080fd",
+				"5b5035919050565b7f4e487b710000000000000000000000000000",
+				"0000000000000000000000000000600052604160045260246000fd",
+				"5b600082601f8301126117b857600080fd5b8135602067ffffffff",
+				"ffffffff808311156117d5576117d5611778565b8260051b604051",
+				"7fffffffffffffffffffffffffffffffffffffffffffffffffffff",
+				"ffffffffffe0603f83011681018181108482111715611818576118",
+				"18611778565b604052938452858101830193838101925087851115",
+				"61183657600080fd5b83870191505b848210156116755781358352",
+				"918301919083019061183c565b803567ffffffffffffffff811681",
+				"1461170957600080fd5b600080600080600080600080610100898b",
+				"03121561188a57600080fd5b8835611895816116d3565b97506020",
+				"89013596506118aa60408a016116f5565b95506118b860608a0161",
+				"16f5565b945060808901356118c8816116d3565b935060a0890135",
+				"67ffffffffffffffff8111156118e457600080fd5b6118f08b828c",
+				"016117a7565b9350506118ff60c08a01611855565b915060e08901",
+				"3590509295985092959890939650565b6000806000806000806000",
+				"806000806101408b8d03121561193557600080fd5b8a3561194081",
+				"6116d3565b995060208b0135985061195560408c016116f5565b97",
+				"5061196360608c016116f5565b965060808b0135611973816116d3",
+				"565b955060a08b013567ffffffffffffffff81111561198f576000",
+				"80fd5b61199b8d828e016117a7565b9550506119aa60c08c016118",
+				"55565b935060e08b013592506101008b013591506101208b013590",
+				"509295989b9194979a5092959850565b6000602082840312156119",
+				"e457600080fd5b81356114f9816116d3565b7f4e487b7100000000",
+				"000000000000000000000000000000000000000000000000600052",
+				"603260045260246000fd5b7f4e487b710000000000000000000000",
+				"000000000000000000000000000000000060005260116004526024",
+				"6000fd5b600082611a83577f4e487b710000000000000000000000",
+				"000000000000000000000000000000000060005260126004526024",
+				"6000fd5b500490565b60007fffffffffffffffffffffffffffffff",
+				"ffffffffffffffffffffffffffffffffff821415611aba57611aba",
+				"611a1e565b5060010190565b60005b83811015611adc5781810151",
+				"83820152602001611ac4565b8381111561056e5750506000910152",
+				"565b60008251611aff818460208701611ac1565b91909101929150",
+				"50565b600181815b80851115611b6257817fffffffffffffffffff",
+				"ffffffffffffffffffffffffffffffffffffffffffffff04821115",
+				"611b4857611b48611a1e565b80851615611b5557918102915b9384",
+				"1c9390800290611b0e565b509250929050565b600082611b795750",
+				"6001611c25565b81611b8657506000611c25565b8160018114611b",
+				"9c5760028114611ba657611bc2565b6001915050611c25565b60ff",
+				"841115611bb757611bb7611a1e565b50506001821b611c25565b50",
+				"60208310610133831016604e8410600b8410161715611be5575081",
+				"810a611c25565b611bef8383611b09565b807fffffffffffffffff",
+				"ffffffffffffffffffffffffffffffffffffffffffffffff048211",
+				"15611c2157611c21611a1e565b0290505b92915050565b60006114",
+				"f98383611b6a565b600082821015611c4957611c49611a1e565b50",
+				"0390565b60008219821115611c6157611c61611a1e565b50019056",
+				"5b7f4e487b71000000000000000000000000000000000000000000",
+				"00000000000000600052600160045260246000fd5b600060208284",
+				"031215611ca757600080fd5b815180151581146114f957600080fd",
+				"5b6020815260008251806020840152611cd6816040850160208701",
+				"611ac1565b601f017fffffffffffffffffffffffffffffffffffff",
+				"ffffffffffffffffffffffffffe016919091016040019291505056",
+				"fea264697066735822122086e50005a89e4c2272c1cba11ff802c1",
+				"213e2b08c8a20c742826166345c5ee3264736f6c63430008090033",
+			},
+			expectedHash: "13a3be23e0f86283cb0ba23739fb1020aa7c85ae498f8d543e37cadcd5ec408b",
+		},
+	}
+
+	for i, vector := range testVectors {
+		t.Run(fmt.Sprintf("test vector %d", i), func(t *testing.T) {
+			hasher, err := New(16)
+			require.NoError(t, err)
+
+			for _, chunk := range vector.bytesChunks {
+				inputBytes, err := hex.DecodeString(chunk)
+				require.NoError(t, err)
+				hasher.Write(inputBytes)
+			}
+
+			res := hasher.Sum(nil)
+			require.Equal(t, vector.expectedHash, hex.EncodeToString(res))
+		})
+	}
+
+}