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Add PeerID function to get the ID of the remote peer #126

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merged 2 commits into from
May 28, 2024
Merged

Add PeerID function to get the ID of the remote peer #126

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3899c50
Add PeerID function to get the ID of the remote peer
cmmarslender May 28, 2024
38af161
Fix lint
cmmarslender May 28, 2024
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25 changes: 25 additions & 0 deletions pkg/peerprotocol/connection.go
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Original file line number Diff line number Diff line change
Expand Up @@ -2,6 +2,7 @@ package peerprotocol

import (
"context"
"crypto/sha256"
"crypto/tls"
"fmt"
"net"
Expand Down Expand Up @@ -145,6 +146,30 @@ func (c *Connection) Close() {
}
}

// PeerID returns the Peer ID for the remote peer
func (c *Connection) PeerID() ([32]byte, error) {
nullBytes := [32]byte{}
err := c.ensureConnection()
if err != nil {
return nullBytes, err
}

netConn := c.conn.NetConn()
tlsConn, ok := netConn.(*tls.Conn)
if !ok {
return nullBytes, fmt.Errorf("could not get tls.Conn from websocket")
}

// Access the connection state
state := tlsConn.ConnectionState()
if len(state.PeerCertificates) == 0 {
return nullBytes, fmt.Errorf("no certificates in chain")
}

cert := state.PeerCertificates[0]
return sha256.Sum256(cert.Raw), nil
}

// Handshake performs the RPC handshake. This should be called before any other method
func (c *Connection) Handshake() error {
// Handshake
Expand Down