gaspersic/go-ethereum
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

p2p/discover: add initial discovery v5 implementation (#20750)

Browse Source 
This adds an implementation of the current discovery v5 spec.

There is full integration with cmd/devp2p and enode.Iterator in this
version. In theory we could enable the new protocol as a replacement of
discovery v4 at any time. In practice, there will likely be a few more
changes to the spec and implementation before this can happen.
This commit is contained in:
Felix Lange
2020-04-08 09:57:23 +02:00
committed by GitHub
parent 671f22be38
commit b7394d7942
19 changed files with 2976 additions and 80 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
p2p/discover/node.go
View File

@ -18,6 +18,7 @@ package discover
import (
"crypto/ecdsa"
"crypto/elliptic"
"errors"
"math/big"
"net"
@ -45,13 +46,13 @@ func encodePubkey(key *ecdsa.PublicKey) encPubkey {
return e
}
func decodePubkey(e encPubkey) (*ecdsa.PublicKey, error) {
p := &ecdsa.PublicKey{Curve: crypto.S256(), X: new(big.Int), Y: new(big.Int)}
func decodePubkey(curve elliptic.Curve, e encPubkey) (*ecdsa.PublicKey, error) {
p := &ecdsa.PublicKey{Curve: curve, X: new(big.Int), Y: new(big.Int)}
half := len(e) / 2
p.X.SetBytes(e[:half])
p.Y.SetBytes(e[half:])
if !p.Curve.IsOnCurve(p.X, p.Y) {
return nil, errors.New("invalid secp256k1 curve point")
return nil, errors.New("invalid curve point")
}
return p, nil
}