func()

in internal/remote/remote.go [113:143]

• 24 lines of code
• 7 McCabe index (conditional complexity)

func (r *remote) publicKey(host, knownHostsPath string) error {
	// parse OpenSSH known_hosts file
	// ssh or use ssh-keyscan to get initial key
	fd, err := os.Open(knownHostsPath)
	if err != nil {
		return fmt.Errorf("an error occurred when opening known_hosts. %v", err)
	}
	defer fd.Close()

	// support -H parameter for ssh-keyscan
	hashhost := knownhosts.HashHostname(host)

	scanner := bufio.NewScanner(fd)
	for scanner.Scan() {
		_, hosts, key, _, _, err := ssh.ParseKnownHosts(scanner.Bytes())
		if err != nil {
			log.Logger.Errorf("failed to parse known_hosts: %s", scanner.Text())
			r.usageMetricsLogger.Error(agentstatus.ParseKnownHostsError)
			continue
		}

		for _, h := range hosts {
			if h == host || h == hashhost {
				r.key.PublicKey = key
				return nil
			}
		}
	}

	return fmt.Errorf("known host file does not contain host %s; please SSH into host first to verify fingerprint", host)
}