chore(crypto): update btcec to v2

Similar to Tendermint's PR,

tendermint/tendermint#9250

Note that crypto/ledger is not updated in this PR, because if its
dependency on the R and S values being exposed by ParseDERSignature.

Updates cosmos#13423

Signed-off-by: Elias Naur <elias@orijtech.com>

crypto/hd/hdpath.go

@@ -10,7 +10,7 @@ import (
 	"strconv"
 	"strings"
 
-	"github.com/btcsuite/btcd/btcec"
+	"github.com/btcsuite/btcd/btcec/v2"
 )
 
 // NewParams creates a BIP 44 parameter object from the params:
@@ -225,7 +225,7 @@ func derivePrivateKey(privKeyBytes [32]byte, chainCode [32]byte, index uint32, h
 		data = append([]byte{byte(0)}, privKeyBytes[:]...)
 	} else {
 		// this can't return an error:
-		_, ecPub := btcec.PrivKeyFromBytes(btcec.S256(), privKeyBytes[:])
+		_, ecPub := btcec.PrivKeyFromBytes(privKeyBytes[:])
 		pubkeyBytes := ecPub.SerializeCompressed()
 		data = pubkeyBytes
 

crypto/keys/secp256k1/secp256k1.go

@@ -8,7 +8,7 @@ import (
 	"io"
 	"math/big"
 
-	secp256k1 "github.com/btcsuite/btcd/btcec"
+	secp256k1 "github.com/btcsuite/btcd/btcec/v2"
 	"github.com/tendermint/tendermint/crypto"
 	"golang.org/x/crypto/ripemd160" //nolint: staticcheck
 
@@ -37,7 +37,7 @@ 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 := secp256k1.PrivKeyFromBytes(secp256k1.S256(), privKey.Key)
+	_, pubkeyObject := secp256k1.PrivKeyFromBytes(privKey.Key)
 	pk := pubkeyObject.SerializeCompressed()
 	return &PubKey{Key: pk}
 }

crypto/keys/secp256k1/secp256k1_internal_test.go

@@ -5,7 +5,7 @@ import (
 	"math/big"
 	"testing"
 
-	btcSecp256k1 "github.com/btcsuite/btcd/btcec"
+	btcSecp256k1 "github.com/btcsuite/btcd/btcec/v2"
 	"github.com/stretchr/testify/require"
 )
 

crypto/keys/secp256k1/secp256k1_nocgo.go

@@ -4,29 +4,22 @@
 package secp256k1
 
 import (
-	"math/big"
-
-	secp256k1 "github.com/btcsuite/btcd/btcec"
+	secp256k1 "github.com/btcsuite/btcd/btcec/v2"
+	"github.com/btcsuite/btcd/btcec/v2/ecdsa"
 
 	"github.com/tendermint/tendermint/crypto"
 )
 
-// used to reject malleable signatures
-// see:
-//   - https://github.com/ethereum/go-ethereum/blob/f9401ae011ddf7f8d2d95020b7446c17f8d98dc1/crypto/signature_nocgo.go#L90-L93
-//   - https://github.com/ethereum/go-ethereum/blob/f9401ae011ddf7f8d2d95020b7446c17f8d98dc1/crypto/crypto.go#L39
-var secp256k1halfN = new(big.Int).Rsh(secp256k1.S256().N, 1)
-
 // Sign creates an ECDSA signature on curve Secp256k1, using SHA256 on the msg.
 // The returned signature will be of the form R || S (in lower-S form).
 func (privKey *PrivKey) Sign(msg []byte) ([]byte, error) {
-	priv, _ := secp256k1.PrivKeyFromBytes(secp256k1.S256(), privKey.Key)
-	sig, err := priv.Sign(crypto.Sha256(msg))
+	priv, _ := secp256k1.PrivKeyFromBytes(privKey.Key)
+	sig, err := ecdsa.SignCompact(priv, crypto.Sha256(msg), false)
 	if err != nil {
 		return nil, err
 	}
-	sigBytes := serializeSig(sig)
-	return sigBytes, nil
+	// remove the first byte which is compactSigRecoveryCode
+	return sig[1:], nil
 }
 
 // VerifyBytes verifies a signature of the form R || S.
@@ -35,37 +28,32 @@ func (pubKey *PubKey) VerifySignature(msg []byte, sigStr []byte) bool {
 	if len(sigStr) != 64 {
 		return false
 	}
-	pub, err := secp256k1.ParsePubKey(pubKey.Key, secp256k1.S256())
+	pub, err := secp256k1.ParsePubKey(pubKey.Key)
 	if err != nil {
 		return false
 	}
 	// parse the signature:
 	signature := signatureFromBytes(sigStr)
 	// Reject malleable signatures. libsecp256k1 does this check but btcec doesn't.
 	// see: https://github.com/ethereum/go-ethereum/blob/f9401ae011ddf7f8d2d95020b7446c17f8d98dc1/crypto/signature_nocgo.go#L90-L93
-	if signature.S.Cmp(secp256k1halfN) > 0 {
+	// Serialize() would negate S value if it is over half order.
+	// Hence, if the signature is different after Serialize() if should be rejected.
+	modifiedSignature, parseErr := ecdsa.ParseDERSignature(signature.Serialize())
+	if parseErr != nil {
+		return false
+	}
+	if !signature.IsEqual(modifiedSignature) {
 		return false
 	}
 	return signature.Verify(crypto.Sha256(msg), pub)
 }
 
 // Read Signature struct from R || S. Caller needs to ensure
 // that len(sigStr) == 64.
-func signatureFromBytes(sigStr []byte) *secp256k1.Signature {
-	return &secp256k1.Signature{
-		R: new(big.Int).SetBytes(sigStr[:32]),
-		S: new(big.Int).SetBytes(sigStr[32:64]),
-	}
-}
-
-// Serialize signature to R || S.
-// R, S are padded to 32 bytes respectively.
-func serializeSig(sig *secp256k1.Signature) []byte {
-	rBytes := sig.R.Bytes()
-	sBytes := sig.S.Bytes()
-	sigBytes := make([]byte, 64)
-	// 0 pad the byte arrays from the left if they aren't big enough.
-	copy(sigBytes[32-len(rBytes):32], rBytes)
-	copy(sigBytes[64-len(sBytes):64], sBytes)
-	return sigBytes
+func signatureFromBytes(sigStr []byte) *ecdsa.Signature {
+	var r secp256k1.ModNScalar
+	r.SetByteSlice(sigStr[:32])
+	var s secp256k1.ModNScalar
+	s.SetByteSlice(sigStr[32:64])
+	return ecdsa.NewSignature(&r, &s)
 }

crypto/keys/secp256k1/secp256k1_nocgo_test.go

@@ -6,7 +6,7 @@ package secp256k1
 import (
 	"testing"
 
-	secp256k1 "github.com/btcsuite/btcd/btcec"
+	secp256k1 "github.com/btcsuite/btcd/btcec/v2"
 	"github.com/stretchr/testify/require"
 )
 
@@ -19,20 +19,29 @@ func TestSignatureVerificationAndRejectUpperS(t *testing.T) {
 		priv := GenPrivKey()
 		sigStr, err := priv.Sign(msg)
 		require.NoError(t, err)
-		sig := signatureFromBytes(sigStr)
-		require.False(t, sig.S.Cmp(secp256k1halfN) > 0)
+		var r secp256k1.ModNScalar
+		r.SetByteSlice(sigStr[:32])
+		var s secp256k1.ModNScalar
+		s.SetByteSlice(sigStr[32:64])
+		require.False(t, s.IsOverHalfOrder())
 
 		pub := priv.PubKey()
 		require.True(t, pub.VerifySignature(msg, sigStr))
 
 		// malleate:
-		sig.S.Sub(secp256k1.S256().CurveParams.N, sig.S)
-		require.True(t, sig.S.Cmp(secp256k1halfN) > 0)
-		malSigStr := serializeSig(sig)
+		var S256 secp256k1.ModNScalar
+		S256.SetByteSlice(secp256k1.S256().N.Bytes())
+		s.Negate().Add(&S256)
+		require.True(t, s.IsOverHalfOrder())
 
+		rBytes := r.Bytes()
+		sBytes := s.Bytes()
+		malSigStr := make([]byte, 64)
+		copy(malSigStr[32-len(rBytes):32], rBytes[:])
+		copy(malSigStr[64-len(sBytes):64], sBytes[:])
 		require.False(t, pub.VerifySignature(msg, malSigStr),
 			"VerifyBytes incorrect with malleated & invalid S. sig=%v, key=%v",
-			sig,
+			malSigStr,
 			priv,
 		)
 	}

crypto/keys/secp256k1/secp256k1_test.go

@@ -7,7 +7,8 @@ import (
 	"math/big"
 	"testing"
 
-	btcSecp256k1 "github.com/btcsuite/btcd/btcec"
+	btcSecp256k1 "github.com/btcsuite/btcd/btcec/v2"
+	btcecdsa "github.com/btcsuite/btcd/btcec/v2/ecdsa"
 	"github.com/cosmos/btcutil/base58"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
@@ -64,7 +65,7 @@ func TestSignAndValidateSecp256k1(t *testing.T) {
 	// ----
 	// Test cross packages verification
 	msgHash := crypto.Sha256(msg)
-	btcPrivKey, btcPubKey := btcSecp256k1.PrivKeyFromBytes(btcSecp256k1.S256(), privKey.Key)
+	btcPrivKey, btcPubKey := btcSecp256k1.PrivKeyFromBytes(privKey.Key)
 	// This fails: malformed signature: no header magic
 	//   btcSig, err := secp256k1.ParseSignature(sig, secp256k1.S256())
 	//   require.NoError(t, err)
@@ -77,9 +78,11 @@ func TestSignAndValidateSecp256k1(t *testing.T) {
 	ok := ecdsa.Verify(btcPubKey.ToECDSA(), msgHash, r, s)
 	require.True(t, ok)
 
-	sig2, err := btcPrivKey.Sign(msgHash)
+	sig2, err := btcecdsa.SignCompact(btcPrivKey, msgHash, false)
+	// Chop off compactSigRecoveryCode.
+	sig2 = sig2[1:]
 	require.NoError(t, err)
-	pubKey.VerifySignature(msg, sig2.Serialize())
+	pubKey.VerifySignature(msg, sig2)
 
 	// ----
 	// Mutate the signature, just one bit.
@@ -98,7 +101,7 @@ func TestSecp256k1LoadPrivkeyAndSerializeIsIdentity(t *testing.T) {
 
 		// This function creates a private and public key in the underlying libraries format.
 		// The private key is basically calling new(big.Int).SetBytes(pk), which removes leading zero bytes
-		priv, _ := btcSecp256k1.PrivKeyFromBytes(btcSecp256k1.S256(), privKeyBytes[:])
+		priv, _ := btcSecp256k1.PrivKeyFromBytes(privKeyBytes[:])
 		// this takes the bytes returned by `(big int).Bytes()`, and if the length is less than 32 bytes,
 		// pads the bytes from the left with zero bytes. Therefore these two functions composed
 		// result in the identity function on privKeyBytes, hence the following equality check

go.mod

@@ -12,6 +12,7 @@ require (
 	github.com/armon/go-metrics v0.4.1
 	github.com/bgentry/speakeasy v0.1.0
 	github.com/btcsuite/btcd v0.22.1
+	github.com/btcsuite/btcd/btcec/v2 v2.2.1
 	github.com/chzyer/readline v0.0.0-20180603132655-2972be24d48e
 	github.com/cockroachdb/apd/v2 v2.0.2
 	github.com/coinbase/rosetta-sdk-go v0.8.1
@@ -81,6 +82,7 @@ require (
 	github.com/creachadair/taskgroup v0.3.2 // indirect
 	github.com/danieljoos/wincred v1.1.2 // indirect
 	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/decred/dcrd/dcrec/secp256k1/v4 v4.0.1 // indirect
 	github.com/desertbit/timer v0.0.0-20180107155436-c41aec40b27f // indirect
 	github.com/dgraph-io/badger/v2 v2.2007.4 // indirect
 	github.com/dgraph-io/ristretto v0.1.0 // indirect

go.sum

@@ -124,6 +124,8 @@ github.com/btcsuite/btcd v0.0.0-20190115013929-ed77733ec07d/go.mod h1:d3C0AkH6BR
 github.com/btcsuite/btcd v0.20.1-beta/go.mod h1:wVuoA8VJLEcwgqHBwHmzLRazpKxTv13Px/pDuV7OomQ=
 github.com/btcsuite/btcd v0.22.1 h1:CnwP9LM/M9xuRrGSCGeMVs9iv09uMqwsVX7EeIpgV2c=
 github.com/btcsuite/btcd v0.22.1/go.mod h1:wqgTSL29+50LRkmOVknEdmt8ZojIzhuWvgu/iptuN7Y=
+github.com/btcsuite/btcd/btcec/v2 v2.2.1 h1:xP60mv8fvp+0khmrN0zTdPC3cNm24rfeE6lh2R/Yv3E=
+github.com/btcsuite/btcd/btcec/v2 v2.2.1/go.mod h1:9/CSmJxmuvqzX9Wh2fXMWToLOHhPd11lSPuIupwTkI8=
 github.com/btcsuite/btcd/chaincfg/chainhash v1.0.1 h1:q0rUy8C/TYNBQS1+CGKw68tLOFYSNEs0TFnxxnS9+4U=
 github.com/btcsuite/btclog v0.0.0-20170628155309-84c8d2346e9f/go.mod h1:TdznJufoqS23FtqVCzL0ZqgP5MqXbb4fg/WgDys70nA=
 github.com/btcsuite/btcutil v0.0.0-20180706230648-ab6388e0c60a/go.mod h1:+5NJ2+qvTyV9exUAL/rxXi3DcLg2Ts+ymUAY5y4NvMg=
@@ -220,6 +222,10 @@ github.com/davecgh/go-spew v0.0.0-20171005155431-ecdeabc65495/go.mod h1:J7Y8YcW2
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/decred/dcrd/crypto/blake256 v1.0.0 h1:/8DMNYp9SGi5f0w7uCm6d6M4OU2rGFK09Y2A4Xv7EE0=
+github.com/decred/dcrd/crypto/blake256 v1.0.0/go.mod h1:sQl2p6Y26YV+ZOcSTP6thNdn47hh8kt6rqSlvmrXFAc=
+github.com/decred/dcrd/dcrec/secp256k1/v4 v4.0.1 h1:YLtO71vCjJRCBcrPMtQ9nqBsqpA1m5sE92cU+pd5Mcc=
+github.com/decred/dcrd/dcrec/secp256k1/v4 v4.0.1/go.mod h1:hyedUtir6IdtD/7lIxGeCxkaw7y45JueMRL4DIyJDKs=
 github.com/desertbit/timer v0.0.0-20180107155436-c41aec40b27f h1:U5y3Y5UE0w7amNe7Z5G/twsBW0KEalRQXZzf8ufSh9I=
 github.com/desertbit/timer v0.0.0-20180107155436-c41aec40b27f/go.mod h1:xH/i4TFMt8koVQZ6WFms69WAsDWr2XsYL3Hkl7jkoLE=
 github.com/dgraph-io/badger/v2 v2.2007.4 h1:TRWBQg8UrlUhaFdco01nO2uXwzKS7zd+HVdwV/GHc4o=

server/rosetta/converter.go

@@ -7,7 +7,7 @@ import (
 	"reflect"
 
 	"cosmossdk.io/math"
-	"github.com/btcsuite/btcd/btcec"
+	"github.com/btcsuite/btcd/btcec/v2"
 	rosettatypes "github.com/coinbase/rosetta-sdk-go/types"
 	abci "github.com/tendermint/tendermint/abci/types"
 	"github.com/tendermint/tendermint/crypto"
@@ -649,7 +649,7 @@ func (c converter) PubKey(pubKey *rosettatypes.PublicKey) (cryptotypes.PubKey, e
 		return nil, crgerrs.WrapError(crgerrs.ErrUnsupportedCurve, "only secp256k1 supported")
 	}
 
-	cmp, err := btcec.ParsePubKey(pubKey.Bytes, btcec.S256())
+	cmp, err := btcec.ParsePubKey(pubKey.Bytes)
 	if err != nil {
 		return nil, crgerrs.WrapError(crgerrs.ErrBadArgument, err.Error())
 	}

simapp/go.mod

@@ -34,6 +34,7 @@ require (
 	github.com/bgentry/go-netrc v0.0.0-20140422174119-9fd32a8b3d3d // indirect
 	github.com/bgentry/speakeasy v0.1.0 // indirect
 	github.com/btcsuite/btcd v0.22.1 // indirect
+	github.com/btcsuite/btcd/btcec/v2 v2.2.1 // indirect
 	github.com/cenkalti/backoff/v4 v4.1.3 // indirect
 	github.com/cespare/xxhash v1.1.0 // indirect
 	github.com/cespare/xxhash/v2 v2.1.2 // indirect
@@ -52,6 +53,7 @@ require (
 	github.com/creachadair/taskgroup v0.3.2 // indirect
 	github.com/danieljoos/wincred v1.1.2 // indirect
 	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/decred/dcrd/dcrec/secp256k1/v4 v4.0.1 // indirect
 	github.com/desertbit/timer v0.0.0-20180107155436-c41aec40b27f // indirect
 	github.com/dgraph-io/badger/v2 v2.2007.4 // indirect
 	github.com/dgraph-io/ristretto v0.1.0 // indirect

simapp/go.sum

@@ -124,6 +124,8 @@ github.com/btcsuite/btcd v0.0.0-20190115013929-ed77733ec07d/go.mod h1:d3C0AkH6BR
 github.com/btcsuite/btcd v0.20.1-beta/go.mod h1:wVuoA8VJLEcwgqHBwHmzLRazpKxTv13Px/pDuV7OomQ=
 github.com/btcsuite/btcd v0.22.1 h1:CnwP9LM/M9xuRrGSCGeMVs9iv09uMqwsVX7EeIpgV2c=
 github.com/btcsuite/btcd v0.22.1/go.mod h1:wqgTSL29+50LRkmOVknEdmt8ZojIzhuWvgu/iptuN7Y=
+github.com/btcsuite/btcd/btcec/v2 v2.2.1 h1:xP60mv8fvp+0khmrN0zTdPC3cNm24rfeE6lh2R/Yv3E=
+github.com/btcsuite/btcd/btcec/v2 v2.2.1/go.mod h1:9/CSmJxmuvqzX9Wh2fXMWToLOHhPd11lSPuIupwTkI8=
 github.com/btcsuite/btcd/chaincfg/chainhash v1.0.1 h1:q0rUy8C/TYNBQS1+CGKw68tLOFYSNEs0TFnxxnS9+4U=
 github.com/btcsuite/btclog v0.0.0-20170628155309-84c8d2346e9f/go.mod h1:TdznJufoqS23FtqVCzL0ZqgP5MqXbb4fg/WgDys70nA=
 github.com/btcsuite/btcutil v0.0.0-20180706230648-ab6388e0c60a/go.mod h1:+5NJ2+qvTyV9exUAL/rxXi3DcLg2Ts+ymUAY5y4NvMg=
@@ -216,6 +218,10 @@ github.com/davecgh/go-spew v0.0.0-20171005155431-ecdeabc65495/go.mod h1:J7Y8YcW2
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/decred/dcrd/crypto/blake256 v1.0.0 h1:/8DMNYp9SGi5f0w7uCm6d6M4OU2rGFK09Y2A4Xv7EE0=
+github.com/decred/dcrd/crypto/blake256 v1.0.0/go.mod h1:sQl2p6Y26YV+ZOcSTP6thNdn47hh8kt6rqSlvmrXFAc=
+github.com/decred/dcrd/dcrec/secp256k1/v4 v4.0.1 h1:YLtO71vCjJRCBcrPMtQ9nqBsqpA1m5sE92cU+pd5Mcc=
+github.com/decred/dcrd/dcrec/secp256k1/v4 v4.0.1/go.mod h1:hyedUtir6IdtD/7lIxGeCxkaw7y45JueMRL4DIyJDKs=
 github.com/desertbit/timer v0.0.0-20180107155436-c41aec40b27f h1:U5y3Y5UE0w7amNe7Z5G/twsBW0KEalRQXZzf8ufSh9I=
 github.com/desertbit/timer v0.0.0-20180107155436-c41aec40b27f/go.mod h1:xH/i4TFMt8koVQZ6WFms69WAsDWr2XsYL3Hkl7jkoLE=
 github.com/dgraph-io/badger/v2 v2.2007.4 h1:TRWBQg8UrlUhaFdco01nO2uXwzKS7zd+HVdwV/GHc4o=

tests/go.mod

@@ -35,6 +35,7 @@ require (
 	github.com/bgentry/go-netrc v0.0.0-20140422174119-9fd32a8b3d3d // indirect
 	github.com/bgentry/speakeasy v0.1.0 // indirect
 	github.com/btcsuite/btcd v0.22.1 // indirect
+	github.com/btcsuite/btcd/btcec/v2 v2.2.1 // indirect
 	github.com/cenkalti/backoff/v4 v4.1.3 // indirect
 	github.com/cespare/xxhash v1.1.0 // indirect
 	github.com/cespare/xxhash/v2 v2.1.2 // indirect
@@ -52,6 +53,7 @@ require (
 	github.com/creachadair/taskgroup v0.3.2 // indirect
 	github.com/danieljoos/wincred v1.1.2 // indirect
 	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/decred/dcrd/dcrec/secp256k1/v4 v4.0.1 // indirect
 	github.com/desertbit/timer v0.0.0-20180107155436-c41aec40b27f // indirect
 	github.com/dgraph-io/badger/v2 v2.2007.4 // indirect
 	github.com/dgraph-io/ristretto v0.1.0 // indirect

tests/go.sum

@@ -124,6 +124,8 @@ github.com/btcsuite/btcd v0.0.0-20190115013929-ed77733ec07d/go.mod h1:d3C0AkH6BR
 github.com/btcsuite/btcd v0.20.1-beta/go.mod h1:wVuoA8VJLEcwgqHBwHmzLRazpKxTv13Px/pDuV7OomQ=
 github.com/btcsuite/btcd v0.22.1 h1:CnwP9LM/M9xuRrGSCGeMVs9iv09uMqwsVX7EeIpgV2c=
 github.com/btcsuite/btcd v0.22.1/go.mod h1:wqgTSL29+50LRkmOVknEdmt8ZojIzhuWvgu/iptuN7Y=
+github.com/btcsuite/btcd/btcec/v2 v2.2.1 h1:xP60mv8fvp+0khmrN0zTdPC3cNm24rfeE6lh2R/Yv3E=
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@@ -216,6 +218,10 @@ github.com/davecgh/go-spew v0.0.0-20171005155431-ecdeabc65495/go.mod h1:J7Y8YcW2
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