84 lines
2.6 KiB
Go
84 lines
2.6 KiB
Go
|
package discovery
|
||
|
|
|
||
|
|
import (
|
||
|
|
"github.com/go-errors/errors"
|
||
|
|
"github.com/lightningnetwork/lnd/lnwire"
|
||
|
|
"github.com/roasbeef/btcd/btcec"
|
||
|
|
"github.com/roasbeef/btcd/chaincfg/chainhash"
|
||
|
|
)
|
||
|
|
|
||
|
|
// validateChannelAnn validates the channel announcement message and checks
|
||
|
|
// that node signatures contains the announcement message, and that the
|
||
|
|
// bitcoin signatures contains the node keys.
|
||
|
|
func (d *Discovery) validateChannelAnn(a *lnwire.ChannelAnnouncement) error {
|
||
|
|
sigHash := chainhash.DoubleHashB(a.NodeID1.SerializeCompressed())
|
||
|
|
if !a.BitcoinSig1.Verify(sigHash, copyPubKey(a.BitcoinKey1)) {
|
||
|
|
return errors.New("can't verify first bitcoin signature")
|
||
|
|
}
|
||
|
|
|
||
|
|
sigHash = chainhash.DoubleHashB(a.NodeID2.SerializeCompressed())
|
||
|
|
if !a.BitcoinSig2.Verify(sigHash, copyPubKey(a.BitcoinKey2)) {
|
||
|
|
return errors.New("can't verify second bitcoin signature")
|
||
|
|
}
|
||
|
|
|
||
|
|
// Get the data of announcement which should be encapsulated in
|
||
|
|
// signature and then check it.
|
||
|
|
data, err := a.DataToSign()
|
||
|
|
if err != nil {
|
||
|
|
return err
|
||
|
|
}
|
||
|
|
dataHash := chainhash.DoubleHashB(data)
|
||
|
|
|
||
|
|
if !a.NodeSig1.Verify(dataHash, copyPubKey(a.NodeID1)) {
|
||
|
|
return errors.New("can't verify data in first node signature")
|
||
|
|
}
|
||
|
|
|
||
|
|
if !a.NodeSig2.Verify(dataHash, copyPubKey(a.NodeID2)) {
|
||
|
|
return errors.New("can't verify data in second node signature")
|
||
|
|
}
|
||
|
|
return nil
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
// validateNodeAnn validates the node announcement by checking that the
|
||
|
|
// the signature corresponds to the node key and have been created with
|
||
|
|
// announcement data.
|
||
|
|
func (d *Discovery) validateNodeAnn(a *lnwire.NodeAnnouncement) error {
|
||
|
|
|
||
|
|
// Get the data of announcement which should be encapsulated in
|
||
|
|
// signature and then check it.
|
||
|
|
data, err := a.DataToSign()
|
||
|
|
if err != nil {
|
||
|
|
return err
|
||
|
|
}
|
||
|
|
|
||
|
|
dataHash := chainhash.DoubleHashB(data)
|
||
|
|
if !a.Signature.Verify(dataHash, copyPubKey(a.NodeID)) {
|
||
|
|
return errors.New("can't check the node annoucement signature")
|
||
|
|
}
|
||
|
|
|
||
|
|
return nil
|
||
|
|
}
|
||
|
|
|
||
|
|
// validateChannelUpdateAnn validates the channel update announcement by
|
||
|
|
// checking that the the signature corresponds to the node key and have been
|
||
|
|
// created with announcement data.
|
||
|
|
func (d *Discovery) validateChannelUpdateAnn(pubKey *btcec.PublicKey,
|
||
|
|
a *lnwire.ChannelUpdateAnnouncement) error {
|
||
|
|
|
||
|
|
// Get the data of announcement which should be encapsulated in
|
||
|
|
// signature and then check it.
|
||
|
|
data, err := a.DataToSign()
|
||
|
|
if err != nil {
|
||
|
|
return errors.Errorf("can't retrieve data to sign: %v", err)
|
||
|
|
}
|
||
|
|
dataHash := chainhash.DoubleHashB(data)
|
||
|
|
|
||
|
|
if !a.Signature.Verify(dataHash, copyPubKey(pubKey)) {
|
||
|
|
return errors.Errorf("verification of channel updates "+
|
||
|
|
"failed chan_id=%v", a.ShortChannelID)
|
||
|
|
}
|
||
|
|
|
||
|
|
return nil
|
||
|
|
}
|