package peers import ( "crypto/ecdsa" "crypto/rand" "crypto/sha256" "encoding/json" udpp2p "github.com/schollz/peerdiscovery" "github.com/status-im/status-go/protocol/protobuf" ) type LocalPairingPeerHello struct { protobuf.LocalPairingPeerHello Discovered udpp2p.Discovered } func NewLocalPairingPeerHello(id []byte, name, deviceType string, k *ecdsa.PrivateKey) (*LocalPairingPeerHello, error) { h := new(LocalPairingPeerHello) h.PeerId = id h.DeviceName = name h.DeviceType = deviceType err := h.sign(k) if err != nil { return nil, err } return h, nil } func (h *LocalPairingPeerHello) MarshalJSON() ([]byte, error) { alias := struct { PeerID []byte DeviceName string DeviceType string Address string }{ PeerID: h.PeerId, DeviceName: h.DeviceName, DeviceType: h.DeviceType, Address: h.Discovered.Address, } return json.Marshal(alias) } func (h *LocalPairingPeerHello) hash() []byte { dHash := sha256.Sum256(append(h.PeerId, []byte(h.DeviceName+h.DeviceType)...)) return dHash[:] } func (h *LocalPairingPeerHello) sign(k *ecdsa.PrivateKey) error { s, err := ecdsa.SignASN1(rand.Reader, k, h.hash()) if err != nil { return err } h.Signature = s return nil } func (h *LocalPairingPeerHello) verify(k *ecdsa.PublicKey) bool { return ecdsa.VerifyASN1(k, h.hash(), h.Signature) }