feat: secp256k1 public key constant time

CHANGELOG.md

@@ -65,6 +65,8 @@ Ref: https://keepachangelog.com/en/1.0.0/
 * (types) [#17670](https://github.com/cosmos/cosmos-sdk/pull/17670) Use `ctx.CometInfo` in place of `ctx.VoteInfos`
 * [#17733](https://github.com/cosmos/cosmos-sdk/pull/17733) Ensure `buf export` exports all proto dependencies
 * (version) [#18063](https://github.com/cosmos/cosmos-sdk/pull/18063) Include additional information in the Info struct. This change enhances the Info struct by adding support for additional information through the ExtraInfo field
+* [#18204](https://github.com/cosmos/cosmos-sdk/pull/18204) Use streaming json parser to parse chain-id from genesis file.
+* (crypto/keys) [#7051](https://github.com/cosmos/cosmos-sdk/issues/7051) Made public key generation constant time on `secp256k1`
 * (crypto | x/auth) [#14372](https://github.com/cosmos/cosmos-sdk/pull/18194) Key checks on signatures antehandle.
 * (codec/unknownproto)[#18541](https://github.com/cosmos/cosmos-sdk/pull/18541) Remove the use of "protoc-gen-gogo/descriptor" in favour of using the official protobuf descriptorpb types inside unknownproto.
 * (staking) [#18506](https://github.com/cosmos/cosmos-sdk/pull/18506) Detect the length of the ed25519 pubkey in CreateValidator to prevent panic.

client/keys/add.go

@@ -20,6 +20,7 @@ import (
 	"github.com/cosmos/cosmos-sdk/crypto/hd"
 	"github.com/cosmos/cosmos-sdk/crypto/keyring"
 	"github.com/cosmos/cosmos-sdk/crypto/keys/multisig"
+	"github.com/cosmos/cosmos-sdk/crypto/keys/secp256k1"
 	cryptotypes "github.com/cosmos/cosmos-sdk/crypto/types"
 	sdk "github.com/cosmos/cosmos-sdk/types"
 )
@@ -217,16 +218,17 @@ func runAddCmd(ctx client.Context, cmd *cobra.Command, args []string, inBuf *buf
 		}
 
 		var pk cryptotypes.PubKey
-		// create an empty pubkey in order to get the algo TypeUrl.
-		tempAny, err := codectypes.NewAnyWithValue(algo.Generate()([]byte{}).PubKey())
+
+		// create an empty seckp256k1 pubkey since it is the key returned by algo Generate function.
+		enotySecpPubKey, err := codectypes.NewAnyWithValue(&secp256k1.PubKey{})
 		if err != nil {
 			return err
 		}
 
 		jsonPub, err := json.Marshal(struct {
 			Type string `json:"@type,omitempty"`
 			Key  string `json:"key,omitempty"`
-		}{tempAny.TypeUrl, string(b64)})
+		}{enotySecpPubKey.TypeUrl, string(b64)})
 		if err != nil {
 			return fmt.Errorf("failed to JSON marshal typeURL and base64 key: %w", err)
 		}

client/v2/go.mod

@@ -142,6 +142,8 @@ require (
 	github.com/tidwall/btree v1.7.0 // indirect
 	github.com/zondax/hid v0.9.2 // indirect
 	github.com/zondax/ledger-go v0.14.3 // indirect
+	gitlab.com/yawning/secp256k1-voi v0.0.0-20230925100816-f2616030848b // indirect
+	gitlab.com/yawning/tuplehash v0.0.0-20230713102510-df83abbf9a02 // indirect
 	go.etcd.io/bbolt v1.3.7 // indirect
 	go.uber.org/multierr v1.11.0 // indirect
 	golang.org/x/crypto v0.16.0 // indirect

client/v2/go.sum

@@ -801,6 +801,10 @@ github.com/zondax/hid v0.9.2 h1:WCJFnEDMiqGF64nlZz28E9qLVZ0KSJ7xpc5DLEyma2U=
 github.com/zondax/hid v0.9.2/go.mod h1:l5wttcP0jwtdLjqjMMWFVEE7d1zO0jvSPA9OPZxWpEM=
 github.com/zondax/ledger-go v0.14.3 h1:wEpJt2CEcBJ428md/5MgSLsXLBos98sBOyxNmCjfUCw=
 github.com/zondax/ledger-go v0.14.3/go.mod h1:IKKaoxupuB43g4NxeQmbLXv7T9AlQyie1UpHb342ycI=
+gitlab.com/yawning/secp256k1-voi v0.0.0-20230925100816-f2616030848b h1:CzigHMRySiX3drau9C6Q5CAbNIApmLdat5jPMqChvDA=
+gitlab.com/yawning/secp256k1-voi v0.0.0-20230925100816-f2616030848b/go.mod h1:/y/V339mxv2sZmYYR64O07VuCpdNZqCTwO8ZcouTMI8=
+gitlab.com/yawning/tuplehash v0.0.0-20230713102510-df83abbf9a02 h1:qwDnMxjkyLmAFgcfgTnfJrmYKWhHnci3GjDqcZp1M3Q=
+gitlab.com/yawning/tuplehash v0.0.0-20230713102510-df83abbf9a02/go.mod h1:JTnUj0mpYiAsuZLmKjTx/ex3AtMowcCgnE7YNyCEP0I=
 go.etcd.io/bbolt v1.3.3/go.mod h1:IbVyRI1SCnLcuJnV2u8VeU0CEYM7e686BmAb1XKL+uU=
 go.etcd.io/bbolt v1.3.7 h1:j+zJOnnEjF/kyHlDDgGnVL/AIqIJPq8UoB2GSNfkUfQ=
 go.etcd.io/bbolt v1.3.7/go.mod h1:N9Mkw9X8x5fupy0IKsmuqVtoGDyxsaDlbk4Rd05IAQw=

crypto/hd/algo.go

@@ -2,6 +2,7 @@ package hd
 
 import (
 	"github.com/cosmos/go-bip39"
+	"gitlab.com/yawning/secp256k1-voi/secec"
 
 	"github.com/cosmos/cosmos-sdk/crypto/keys/secp256k1"
 	"github.com/cosmos/cosmos-sdk/crypto/types"
@@ -65,6 +66,11 @@ func (s secp256k1Algo) Generate() GenerateFn {
 		bzArr := make([]byte, secp256k1.PrivKeySize)
 		copy(bzArr, bz)
 
-		return &secp256k1.PrivKey{Key: bzArr}
+		privKeyObj, err := secec.NewPrivateKey(bz)
+		if err != nil {
+			panic(err)
+		}
+
+		return &secp256k1.PrivKey{Key: privKeyObj.Bytes()}
 	}
 }

crypto/keys/secp256k1/bench_test.go

@@ -11,7 +11,7 @@ import (
 func BenchmarkKeyGeneration(b *testing.B) {
 	b.ReportAllocs()
 	benchmarkKeygenWrapper := func(reader io.Reader) types.PrivKey {
-		priv := genPrivKey(reader)
+		priv := genPrivKey()
 		return &PrivKey{Key: priv}
 	}
 	benchmarking.BenchmarkKeyGeneration(b, benchmarkKeygenWrapper)

crypto/keys/secp256k1/internal/secp256k1/scalar_mult_cgo.go

@@ -8,11 +8,6 @@
 // nolint // this nolint lets us use this file in its original and unmodified form.
 package secp256k1
 
-import (
-	"math/big"
-	"unsafe"
-)
-
 /*
 
 #include "libsecp256k1/include/secp256k1.h"
@@ -22,6 +17,11 @@ extern int secp256k1_ext_scalar_mul(const secp256k1_context* ctx, const unsigned
 */
 import "C"
 
+import (
+	"math/big"
+	"unsafe"
+)
+
 func (BitCurve *BitCurve) ScalarMult(Bx, By *big.Int, scalar []byte) (*big.Int, *big.Int) {
 	// Ensure scalar is exactly 32 bytes. We pad always, even if
 	// scalar is 32 bytes long, to avoid a timing side channel.

crypto/keys/secp256k1/internal/secp256k1/secp256_test.go

@@ -24,6 +24,7 @@ func generateKeyPair() (pubkey, privkey []byte) {
 	if err != nil {
 		panic(err)
 	}
+
 	pubkey = elliptic.Marshal(S256(), key.X, key.Y) //nolint:staticcheck // crypto will be refactored soon.
 	privkey = make([]byte, 32)
 	blob := key.D.Bytes()

crypto/keys/secp256k1/secp256k1.go

@@ -10,6 +10,7 @@ import (
 
 	"github.com/cometbft/cometbft/crypto"
 	secp256k1dcrd "github.com/decred/dcrd/dcrec/secp256k1/v4"
+	"gitlab.com/yawning/secp256k1-voi/secec"
 	"golang.org/x/crypto/ripemd160" //nolint: staticcheck // keep around for backwards compatibility
 
 	errorsmod "cosmossdk.io/errors"
@@ -39,10 +40,12 @@ func (privKey *PrivKey) Bytes() []byte {
 // PubKey performs the point-scalar multiplication from the privKey on the
 // generator point to get the pubkey.
 func (privKey *PrivKey) PubKey() cryptotypes.PubKey {
-	pubkeyObject := secp256k1dcrd.PrivKeyFromBytes(privKey.Key).PubKey()
+	privateKeyObject, err := secec.NewPrivateKey(privKey.Key)
+	if err != nil {
+		panic(err)
+	}
 
-	pk := pubkeyObject.SerializeCompressed()
-	return &PubKey{Key: pk}
+	return &PubKey{Key: privateKeyObject.PublicKey().CompressedBytes()}
 }
 
 // Equals - you probably don't need to use this.
@@ -85,11 +88,21 @@ func (privKey *PrivKey) UnmarshalAminoJSON(bz []byte) error {
 // GenPrivKey generates a new ECDSA private key on curve secp256k1 private key.
 // It uses OS randomness to generate the private key.
 func GenPrivKey() *PrivKey {
-	return &PrivKey{Key: genPrivKey(crypto.CReader())}
+	return &PrivKey{Key: genPrivKey()}
+}
+
+// genPrivKey generates a new secp256k1 private key.
+func genPrivKey() []byte {
+	privateKeyObject, err := secec.GenerateKey()
+	if err != nil {
+		panic(err)
+	}
+
+	return privateKeyObject.Bytes()
 }
 
-// genPrivKey generates a new secp256k1 private key using the provided reader.
-func genPrivKey(rand io.Reader) []byte {
+// genPrivKeyLegacy generates a new secp256k1 private key using the provided reader.
+func genPrivKeyLegacy(rand io.Reader) []byte {
 	var privKeyBytes [PrivKeySize]byte
 	d := new(big.Int)
 	for {

crypto/keys/secp256k1/secp256k1_cgo_test.go

@@ -7,7 +7,6 @@ import (
 	"testing"
 
 	"github.com/magiconair/properties/assert"
-
 	"github.com/stretchr/testify/require"
 )
 

crypto/keys/secp256k1/secp256k1_internal_test.go

@@ -31,11 +31,11 @@ func Test_genPrivKey(t *testing.T) {
 		t.Run(tt.name, func(t *testing.T) {
 			if tt.shouldPanic {
 				require.Panics(t, func() {
-					genPrivKey(bytes.NewReader(tt.notSoRand))
+					genPrivKeyLegacy(bytes.NewReader(tt.notSoRand))
 				})
 				return
 			}
-			got := genPrivKey(bytes.NewReader(tt.notSoRand))
+			got := genPrivKeyLegacy(bytes.NewReader(tt.notSoRand))
 			fe := new(big.Int).SetBytes(got)
 			require.True(t, fe.Cmp(secp.S256().N) < 0)
 			require.True(t, fe.Sign() > 0)

crypto/keys/secp256k1/secp256k1_nocgo_test.go

@@ -6,7 +6,7 @@ package secp256k1
 import (
 	"testing"
 
-	secp256k1 "github.com/decred/dcrd/dcrec/secp256k1/v4"
+	secp256k1_dcrd "github.com/decred/dcrd/dcrec/secp256k1/v4"
 	"github.com/stretchr/testify/require"
 )
 
@@ -19,18 +19,18 @@ func TestSignatureVerificationAndRejectUpperS(t *testing.T) {
 		priv := GenPrivKey()
 		sigStr, err := priv.Sign(msg)
 		require.NoError(t, err)
-		var r secp256k1.ModNScalar
+		var r secp256k1_dcrd.ModNScalar
 		r.SetByteSlice(sigStr[:32])
-		var s secp256k1.ModNScalar
+		var s secp256k1_dcrd.ModNScalar
 		s.SetByteSlice(sigStr[32:64])
 		require.False(t, s.IsOverHalfOrder())
 
 		pub := priv.PubKey()
 		require.True(t, pub.VerifySignature(msg, sigStr))
 
 		// malleate:
-		var S256 secp256k1.ModNScalar
-		S256.SetByteSlice(secp256k1.S256().N.Bytes())
+		var S256 secp256k1_dcrd.ModNScalar
+		S256.SetByteSlice(secp256k1_dcrd.S256().N.Bytes())
 		s.Negate().Add(&S256)
 		require.True(t, s.IsOverHalfOrder())
 
@@ -46,3 +46,20 @@ func TestSignatureVerificationAndRejectUpperS(t *testing.T) {
 		)
 	}
 }
+
+func TestConstantTimePubKeyGeneration(t *testing.T) {
+	for i := 0; i < 500; i++ {
+		pk := GenPrivKey().PubKey()
+		require.NotNil(t, pk)
+	}
+}
+
+// Legacy generation code
+func TestNonConstantTimePubKeyGeneration(t *testing.T) {
+	for i := 0; i < 500; i++ {
+		privKey := GenPrivKey()
+		nonConstantTimePk := secp256k1_dcrd.PrivKeyFromBytes(privKey.Key).PubKey().SerializeCompressed() // Legacy functionability from pubkey
+		pk := &PubKey{Key: nonConstantTimePk}
+		require.NotNil(t, pk)
+	}
+}

crypto/keys/secp256k1/secp256k1_test.go

@@ -450,3 +450,14 @@ func TestMarshalAmino_BackwardsCompatibility(t *testing.T) {
 		})
 	}
 }
+
+func TestLegacyKeyGenerationAgainstConstantTime(t *testing.T) {
+	privKey := secp256k1.GenPrivKey()
+
+	pubKey := privKey.PubKey()
+
+	nonConstantTimePk := secp.PrivKeyFromBytes(privKey.Key).PubKey().SerializeCompressed() // Legacy functionability from pubkey
+	legacyPubKey := &secp256k1.PubKey{Key: nonConstantTimePk}
+
+	require.Equal(t, legacyPubKey, pubKey)
+}

crypto/ledger/ledger_secp256k1.go

@@ -8,6 +8,7 @@ import (
 
 	secp "github.com/decred/dcrd/dcrec/secp256k1/v4"
 	"github.com/decred/dcrd/dcrec/secp256k1/v4/ecdsa"
+	"gitlab.com/yawning/secp256k1-voi/secec"
 
 	"github.com/cosmos/cosmos-sdk/crypto/hd"
 	"github.com/cosmos/cosmos-sdk/crypto/keys/secp256k1"
@@ -320,13 +321,13 @@ func getPubKeyUnsafe(device SECP256K1, path hd.BIP44Params) (types.PubKey, error
 	}
 
 	// re-serialize in the 33-byte compressed format
-	cmp, err := secp.ParsePubKey(publicKey)
+	cmp, err := secec.NewPublicKey(publicKey)
 	if err != nil {
 		return nil, fmt.Errorf("error parsing public key: %w", err)
 	}
 
 	compressedPublicKey := make([]byte, secp256k1.PubKeySize)
-	copy(compressedPublicKey, cmp.SerializeCompressed())
+	copy(compressedPublicKey, cmp.CompressedBytes())
 
 	return options.createPubkey(compressedPublicKey), nil
 }
@@ -344,13 +345,13 @@ func getPubKeyAddrSafe(device SECP256K1, path hd.BIP44Params, hrp string) (types
 	}
 
 	// re-serialize in the 33-byte compressed format
-	cmp, err := secp.ParsePubKey(publicKey)
+	cmp, err := secec.NewPublicKey(publicKey)
 	if err != nil {
 		return nil, "", fmt.Errorf("error parsing public key: %w", err)
 	}
 
 	compressedPublicKey := make([]byte, secp256k1.PubKeySize)
-	copy(compressedPublicKey, cmp.SerializeCompressed())
+	copy(compressedPublicKey, cmp.CompressedBytes())
 
 	return options.createPubkey(compressedPublicKey), addr, nil
 }

go.mod

@@ -52,6 +52,7 @@ require (
 	github.com/spf13/viper v1.17.0
 	github.com/stretchr/testify v1.8.4
 	github.com/tendermint/go-amino v0.16.0
+	gitlab.com/yawning/secp256k1-voi v0.0.0-20230925100816-f2616030848b
 	golang.org/x/crypto v0.16.0
 	golang.org/x/exp v0.0.0-20231127185646-65229373498e
 	golang.org/x/sync v0.5.0
@@ -147,6 +148,7 @@ require (
 	github.com/tidwall/btree v1.7.0 // indirect
 	github.com/zondax/hid v0.9.2 // indirect
 	github.com/zondax/ledger-go v0.14.3 // indirect
+	gitlab.com/yawning/tuplehash v0.0.0-20230713102510-df83abbf9a02 // indirect
 	go.etcd.io/bbolt v1.3.7 // indirect
 	go.uber.org/multierr v1.11.0 // indirect
 	golang.org/x/net v0.19.0 // indirect

go.sum

@@ -798,6 +798,10 @@ github.com/zondax/hid v0.9.2 h1:WCJFnEDMiqGF64nlZz28E9qLVZ0KSJ7xpc5DLEyma2U=
 github.com/zondax/hid v0.9.2/go.mod h1:l5wttcP0jwtdLjqjMMWFVEE7d1zO0jvSPA9OPZxWpEM=
 github.com/zondax/ledger-go v0.14.3 h1:wEpJt2CEcBJ428md/5MgSLsXLBos98sBOyxNmCjfUCw=
 github.com/zondax/ledger-go v0.14.3/go.mod h1:IKKaoxupuB43g4NxeQmbLXv7T9AlQyie1UpHb342ycI=
+gitlab.com/yawning/secp256k1-voi v0.0.0-20230925100816-f2616030848b h1:CzigHMRySiX3drau9C6Q5CAbNIApmLdat5jPMqChvDA=
+gitlab.com/yawning/secp256k1-voi v0.0.0-20230925100816-f2616030848b/go.mod h1:/y/V339mxv2sZmYYR64O07VuCpdNZqCTwO8ZcouTMI8=
+gitlab.com/yawning/tuplehash v0.0.0-20230713102510-df83abbf9a02 h1:qwDnMxjkyLmAFgcfgTnfJrmYKWhHnci3GjDqcZp1M3Q=
+gitlab.com/yawning/tuplehash v0.0.0-20230713102510-df83abbf9a02/go.mod h1:JTnUj0mpYiAsuZLmKjTx/ex3AtMowcCgnE7YNyCEP0I=
 go.etcd.io/bbolt v1.3.3/go.mod h1:IbVyRI1SCnLcuJnV2u8VeU0CEYM7e686BmAb1XKL+uU=
 go.etcd.io/bbolt v1.3.7 h1:j+zJOnnEjF/kyHlDDgGnVL/AIqIJPq8UoB2GSNfkUfQ=
 go.etcd.io/bbolt v1.3.7/go.mod h1:N9Mkw9X8x5fupy0IKsmuqVtoGDyxsaDlbk4Rd05IAQw=

simapp/go.mod

@@ -182,6 +182,8 @@ require (
 	github.com/ulikunitz/xz v0.5.11 // indirect
 	github.com/zondax/hid v0.9.2 // indirect
 	github.com/zondax/ledger-go v0.14.3 // indirect
+	gitlab.com/yawning/secp256k1-voi v0.0.0-20230925100816-f2616030848b // indirect
+	gitlab.com/yawning/tuplehash v0.0.0-20230713102510-df83abbf9a02 // indirect
 	go.etcd.io/bbolt v1.3.7 // indirect
 	go.opencensus.io v0.24.0 // indirect
 	go.uber.org/multierr v1.11.0 // indirect

simapp/go.sum

@@ -1025,6 +1025,10 @@ github.com/zondax/hid v0.9.2 h1:WCJFnEDMiqGF64nlZz28E9qLVZ0KSJ7xpc5DLEyma2U=
 github.com/zondax/hid v0.9.2/go.mod h1:l5wttcP0jwtdLjqjMMWFVEE7d1zO0jvSPA9OPZxWpEM=
 github.com/zondax/ledger-go v0.14.3 h1:wEpJt2CEcBJ428md/5MgSLsXLBos98sBOyxNmCjfUCw=
 github.com/zondax/ledger-go v0.14.3/go.mod h1:IKKaoxupuB43g4NxeQmbLXv7T9AlQyie1UpHb342ycI=
+gitlab.com/yawning/secp256k1-voi v0.0.0-20230925100816-f2616030848b h1:CzigHMRySiX3drau9C6Q5CAbNIApmLdat5jPMqChvDA=
+gitlab.com/yawning/secp256k1-voi v0.0.0-20230925100816-f2616030848b/go.mod h1:/y/V339mxv2sZmYYR64O07VuCpdNZqCTwO8ZcouTMI8=
+gitlab.com/yawning/tuplehash v0.0.0-20230713102510-df83abbf9a02 h1:qwDnMxjkyLmAFgcfgTnfJrmYKWhHnci3GjDqcZp1M3Q=
+gitlab.com/yawning/tuplehash v0.0.0-20230713102510-df83abbf9a02/go.mod h1:JTnUj0mpYiAsuZLmKjTx/ex3AtMowcCgnE7YNyCEP0I=
 go.etcd.io/bbolt v1.3.3/go.mod h1:IbVyRI1SCnLcuJnV2u8VeU0CEYM7e686BmAb1XKL+uU=
 go.etcd.io/bbolt v1.3.7 h1:j+zJOnnEjF/kyHlDDgGnVL/AIqIJPq8UoB2GSNfkUfQ=
 go.etcd.io/bbolt v1.3.7/go.mod h1:N9Mkw9X8x5fupy0IKsmuqVtoGDyxsaDlbk4Rd05IAQw=

simapp/gomod2nix.toml

@@ -453,6 +453,12 @@ schema = 3
   [mod."github.com/zondax/ledger-go"]
     version = "v0.14.3"
     hash = "sha256-tldEok5ebZ4R4B7H8dSlYS5oVuLvh89n9wUaVlDjYwg="
+  [mod."gitlab.com/yawning/secp256k1-voi"]
+    version = "v0.0.0-20230925100816-f2616030848b"
+    hash = "sha256-X8INg01LTg13iOuwPI3uOhPN7r01sPZtmtwJ2sudjCA="
+  [mod."gitlab.com/yawning/tuplehash"]
+    version = "v0.0.0-20230713102510-df83abbf9a02"
+    hash = "sha256-pehQduoaJRLchebhgvMYacVvbuNIBA++XkiqCuqdato="
   [mod."go.etcd.io/bbolt"]
     version = "v1.3.7"
     hash = "sha256-poZk8tPLDWwW95oCOkTJcQtEvOJTD9UXAZ2TqGJutwk="

tests/go.mod

@@ -183,6 +183,8 @@ require (
 	github.com/ulikunitz/xz v0.5.11 // indirect
 	github.com/zondax/hid v0.9.2 // indirect
 	github.com/zondax/ledger-go v0.14.3 // indirect
+	gitlab.com/yawning/secp256k1-voi v0.0.0-20230925100816-f2616030848b // indirect
+	gitlab.com/yawning/tuplehash v0.0.0-20230713102510-df83abbf9a02 // indirect
 	go.etcd.io/bbolt v1.3.7 // indirect
 	go.opencensus.io v0.24.0 // indirect
 	go.uber.org/multierr v1.11.0 // indirect

tests/go.sum

@@ -1026,6 +1026,10 @@ github.com/zondax/hid v0.9.2 h1:WCJFnEDMiqGF64nlZz28E9qLVZ0KSJ7xpc5DLEyma2U=
 github.com/zondax/hid v0.9.2/go.mod h1:l5wttcP0jwtdLjqjMMWFVEE7d1zO0jvSPA9OPZxWpEM=
 github.com/zondax/ledger-go v0.14.3 h1:wEpJt2CEcBJ428md/5MgSLsXLBos98sBOyxNmCjfUCw=
 github.com/zondax/ledger-go v0.14.3/go.mod h1:IKKaoxupuB43g4NxeQmbLXv7T9AlQyie1UpHb342ycI=
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