Merge pull request #648 from Gustav-Simonsson/forward_ecrecover_err_and_remove_dup_checks

Forward and log EC recover err and remove dup pubkey len check

2 files changed, 13 insertions, 3 deletions

diff --git a/core/types/transaction.go b/core/types/transaction.go
index 6f438ad9d..6646bdf29 100644
--- a/core/types/transaction.go
+++ b/core/types/transaction.go
@@ -9,6 +9,8 @@ import (
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/crypto"
 	"github.com/ethereum/go-ethereum/crypto/secp256k1"
+	"github.com/ethereum/go-ethereum/logger"
+	"github.com/ethereum/go-ethereum/logger/glog"
 	"github.com/ethereum/go-ethereum/rlp"
 )
 
@@ -129,7 +131,12 @@ func (tx *Transaction) PublicKey() []byte {
 
 	//pubkey := crypto.Ecrecover(append(hash[:], sig...))
 	//pubkey, _ := secp256k1.RecoverPubkey(hash[:], sig)
-	pubkey := crypto.FromECDSAPub(crypto.SigToPub(hash[:], sig))
+	p, err := crypto.SigToPub(hash[:], sig)
+	if err != nil {
+		glog.V(logger.Error).Infof("Could not get pubkey from signature: ", err)
+		return nil
+	}
+	pubkey := crypto.FromECDSAPub(p)
 	return pubkey
 }
 
diff --git a/core/vm/address.go b/core/vm/address.go
index df801863f..742017dd2 100644
--- a/core/vm/address.go
+++ b/core/vm/address.go
@@ -5,6 +5,8 @@ import (
 
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/crypto"
+	"github.com/ethereum/go-ethereum/logger"
+	"github.com/ethereum/go-ethereum/logger/glog"
 	"github.com/ethereum/go-ethereum/params"
 )
 
@@ -80,9 +82,10 @@ func ecrecoverFunc(in []byte) []byte {
 
 	// v needs to be moved to the end
 	rsv := append(in[64:128], byte(v.Uint64()))
-	pubKey := crypto.Ecrecover(in[:32], rsv)
+	pubKey, err := crypto.Ecrecover(in[:32], rsv)
 	// make sure the public key is a valid one
-	if pubKey == nil || len(pubKey) != 65 {
+	if err != nil {
+		glog.V(logger.Error).Infof("EC RECOVER FAIL: ", err)
 		return nil
 	}