aarifullin/neoneo-go
1
0
Fork 0
forked from TrueCloudLab/neoneo-go
Code Pull requests Activity

network: forbid Notary contract to be a sender of main transaction

Browse source 
This prevents the possible attack on notary request sender when
malicious partie is allowed to send notary request with main transaction
being someone else's fallback.

Signed-off-by: Anna Shaleva <shaleva.ann@nspcc.ru>
This commit is contained in:
Anna Shaleva 2023-07-20 10:55:11 +03:00
parent e7a83cbef9
commit 966111f4a8
2 changed files with 14 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

3
pkg/network/server.go
View file

@ -1201,6 +1201,9 @@ func (s *Server) verifyNotaryRequest(_ *transaction.Transaction, data any) error
if r.FallbackTransaction.Sender() != notaryHash {
return fmt.Errorf("P2PNotary contract should be a sender of the fallback transaction, got %s", address.Uint160ToString(r.FallbackTransaction.Sender()))
}
if r.MainTransaction.Sender() == notaryHash {
return errors.New("P2PNotary contract is not allowed to be the sender of the main transaction")
}
depositExpiration := s.chain.GetNotaryDepositExpiration(payer)
if r.FallbackTransaction.ValidUntilBlock >= depositExpiration {
return fmt.Errorf("fallback transaction is valid after deposit is unlocked: ValidUntilBlock is %d, deposit lock for %s expires at %d", r.FallbackTransaction.ValidUntilBlock, address.Uint160ToString(payer), depositExpiration)

12
pkg/network/server_test.go
View file

@ -1036,7 +1036,10 @@ func TestVerifyNotaryRequest(t *testing.T) {
require.NoError(t, err)
newNotaryRequest := func() *payload.P2PNotaryRequest {
return &payload.P2PNotaryRequest{
MainTransaction: &transaction.Transaction{Script: []byte{0, 1, 2}},
MainTransaction: &transaction.Transaction{
Script: []byte{0, 1, 2},
Signers: []transaction.Signer{{Account: random.Uint160()}},
},
FallbackTransaction: &transaction.Transaction{
ValidUntilBlock: 321,
Signers: []transaction.Signer{{Account: bc.NotaryContractScriptHash}, {Account: random.Uint160()}},
@ -1057,6 +1060,13 @@ func TestVerifyNotaryRequest(t *testing.T) {
require.Error(t, s.verifyNotaryRequest(nil, r))
})
t.Run("bad main sender", func(t *testing.T) {
bc.VerifyWitnessF = func() (int64, error) { return 0, nil }
r := newNotaryRequest()
r.MainTransaction.Signers[0] = transaction.Signer{Account: bc.NotaryContractScriptHash}
require.Error(t, s.verifyNotaryRequest(nil, r))
})
t.Run("expired deposit", func(t *testing.T) {
r := newNotaryRequest()
bc.NotaryDepositExpiration = r.FallbackTransaction.ValidUntilBlock