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// SPDX-FileCopyrightText: 2022 Tillitis AB <tillitis.se>
// SPDX-License-Identifier: BSD-2-Clause
package tkeyclient
import (
"fmt"
"os"
"go.bug.st/serial/enumerator"
)
const (
tillitisMTAUSBV1VID = "1207"
tillitisMTAUSBV1PID = "8887"
tillitisTKEYUSBV2VID = "1209"
tillitisTKEYUSBV2PID = "8885"
// Custom errors
ErrNoDevice = constError("no TKey connected")
ErrManyDevices = constError("more than one TKey connected")
)
type SerialPort struct {
DevPath string
SerialNumber string
}
func isTKey(vid string, pid string) bool {
return (vid == tillitisMTAUSBV1VID && pid == tillitisMTAUSBV1PID) ||
(vid == tillitisTKEYUSBV2VID && pid == tillitisTKEYUSBV2PID)
}
// DetectSerialPort tries to detect an inserted TKey and returns the
// device path if successful.
func DetectSerialPort(verbose bool) (string, error) {
ports, err := GetSerialPorts()
if err != nil {
return "", err
}
if len(ports) == 0 {
if verbose {
fmt.Fprintf(os.Stderr, "No TKey serial ports detected.\n")
}
return "", ErrNoDevice
}
if len(ports) > 1 {
if verbose {
fmt.Fprintf(os.Stderr, "Detected %d TKey serial ports:\n", len(ports))
for _, p := range ports {
fmt.Fprintf(os.Stderr, "%s with serial number %s\n", p.DevPath, p.SerialNumber)
}
}
return "", ErrManyDevices
}
if verbose {
fmt.Fprintf(os.Stderr, "Auto-detected serial port %s\n", ports[0].DevPath)
}
return ports[0].DevPath, nil
}
// GetSerialPorts enumerates any existing TKey serial ports identified
// on the system.
func GetSerialPorts() ([]SerialPort, error) {
var ports []SerialPort
portDetails, err := enumerator.GetDetailedPortsList()
if err != nil {
return nil, fmt.Errorf("GetDetailedPortsList: %w", err)
}
if len(portDetails) == 0 {
return ports, nil
}
for _, port := range portDetails {
if port.IsUSB && isTKey(port.VID, port.PID) {
ports = append(ports, SerialPort{port.Name, port.SerialNumber})
}
}
return ports, nil
}
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