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core/types, xeth: separate tx hash and tx signature hash

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This commit is contained in:
Felix Lange 2015-07-06 10:43:06 +02:00
parent 9c3db1be1d
commit ec9620fb2f
3 changed files with 17 additions and 9 deletions
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18
core/types/transaction.go
View File

@ -116,11 +116,21 @@ func (tx *Transaction) To() *common.Address {
} }
} }
// Hash hashes the RLP encoding of tx.
// It uniquely identifies the transaction.
func (tx *Transaction) Hash() common.Hash { func (tx *Transaction) Hash() common.Hash {
if hash := tx.hash.Load(); hash != nil { if hash := tx.hash.Load(); hash != nil {
return hash.(common.Hash) return hash.(common.Hash)
} }
v := rlpHash([]interface{}{ v := rlpHash(tx)
tx.hash.Store(v)
return v
}
// SigHash returns the hash to be signed by the sender.
// It does not uniquely identify the transaction.
func (tx *Transaction) SigHash() common.Hash {
return rlpHash([]interface{}{
tx.data.AccountNonce, tx.data.AccountNonce,
tx.data.Price, tx.data.Price,
tx.data.GasLimit, tx.data.GasLimit,
@ -128,8 +138,6 @@ func (tx *Transaction) Hash() common.Hash {
tx.data.Amount, tx.data.Amount,
tx.data.Payload, tx.data.Payload,
}) })
tx.hash.Store(v)
return v
} }
func (tx *Transaction) Size() common.StorageSize { func (tx *Transaction) Size() common.StorageSize {
@ -180,7 +188,7 @@ func (tx *Transaction) publicKey() ([]byte, error) {
sig[64] = tx.data.V - 27 sig[64] = tx.data.V - 27
// recover the public key from the signature // recover the public key from the signature
hash := tx.Hash() hash := tx.SigHash()
pub, err := crypto.Ecrecover(hash[:], sig) pub, err := crypto.Ecrecover(hash[:], sig)
if err != nil { if err != nil {
glog.V(logger.Error).Infof("Could not get pubkey from signature: ", err) glog.V(logger.Error).Infof("Could not get pubkey from signature: ", err)
@ -204,7 +212,7 @@ func (tx *Transaction) WithSignature(sig []byte) (*Transaction, error) {
} }
func (tx *Transaction) SignECDSA(prv *ecdsa.PrivateKey) (*Transaction, error) { func (tx *Transaction) SignECDSA(prv *ecdsa.PrivateKey) (*Transaction, error) {
h := tx.Hash() h := tx.SigHash()
sig, err := crypto.Sign(h[:], prv) sig, err := crypto.Sign(h[:], prv)
if err != nil { if err != nil {
return nil, err return nil, err

6
core/types/transaction_test.go
View File

@ -34,11 +34,11 @@ var (
) )
) )
func TestTransactionHash(t *testing.T) { func TestTransactionSigHash(t *testing.T) {
if emptyTx.Hash() != common.HexToHash("c775b99e7ad12f50d819fcd602390467e28141316969f4b57f0626f74fe3b386") { if emptyTx.SigHash() != common.HexToHash("c775b99e7ad12f50d819fcd602390467e28141316969f4b57f0626f74fe3b386") {
t.Errorf("empty transaction hash mismatch, got %x", emptyTx.Hash()) t.Errorf("empty transaction hash mismatch, got %x", emptyTx.Hash())
} }
if rightvrsTx.Hash() != common.HexToHash("fe7a79529ed5f7c3375d06b26b186a8644e0e16c373d7a12be41c62d6042b77a") { if rightvrsTx.SigHash() != common.HexToHash("fe7a79529ed5f7c3375d06b26b186a8644e0e16c373d7a12be41c62d6042b77a") {
t.Errorf("RightVRS transaction hash mismatch, got %x", rightvrsTx.Hash()) t.Errorf("RightVRS transaction hash mismatch, got %x", rightvrsTx.Hash())
} }
} }

2
xeth/xeth.go
View File

@ -978,7 +978,7 @@ func (self *XEth) Transact(fromStr, toStr, nonceStr, valueStr, gasStr, gasPriceS
} }
func (self *XEth) sign(tx *types.Transaction, from common.Address, didUnlock bool) (*types.Transaction, error) { func (self *XEth) sign(tx *types.Transaction, from common.Address, didUnlock bool) (*types.Transaction, error) {
hash := tx.Hash() hash := tx.SigHash()
sig, err := self.doSign(from, hash, didUnlock) sig, err := self.doSign(from, hash, didUnlock)
if err != nil { if err != nil {
return tx, err return tx, err