CriticalOptions: map[string]string{
						"accessKey": c.User(),
					},
					Extensions: make(map[string]string),
				}, nil
			}
			return nil, errAuthentication
		},
	}

	sshConfig.AddHostKey(private)

	handleSFTPSession := func(channel ssh.Channel, sconn *ssh.ServerConn) {
		server := sftp.NewRequestServer(channel, NewSFTPDriver(sconn.Permissions), sftp.WithRSAllocator())
		defer server.Close()