authkey.go 3.3 KB

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  1. package ganserv
  2. import (
  3. "bufio"
  4. "fmt"
  5. "log"
  6. "os"
  7. "os/exec"
  8. "os/user"
  9. "runtime"
  10. "strings"
  11. "syscall"
  12. "golang.org/x/sys/windows"
  13. )
  14. func TryLoadorAskUserForAuthkey() string {
  15. //Check for zt auth token
  16. value, exists := os.LookupEnv("ZT_AUTH")
  17. if !exists {
  18. log.Println("Environment variable ZT_AUTH not defined. Trying to load authtoken from file.")
  19. } else {
  20. return value
  21. }
  22. authKey := ""
  23. if runtime.GOOS == "windows" {
  24. b, err := os.ReadFile("C:\\ProgramData\\ZeroTier\\One\\authtoken.secret")
  25. if err == nil {
  26. log.Println("Zerotier authkey loaded")
  27. authKey = string(b)
  28. } else {
  29. log.Println("Unable to read authkey at C:\\ProgramData\\ZeroTier\\One\\authtoken.secret: ", err.Error())
  30. }
  31. } else if runtime.GOOS == "linux" {
  32. if isRoot() {
  33. //Try to read from source using sudo
  34. ak, err := readAuthTokenAsRoot()
  35. if err == nil {
  36. log.Println("Zerotier authkey loaded")
  37. authKey = strings.TrimSpace(ak)
  38. } else {
  39. log.Println("Unable to read authkey at /var/lib/zerotier-one/authtoken.secret: ", err.Error())
  40. }
  41. } else {
  42. //Try read from source
  43. b, err := os.ReadFile("/var/lib/zerotier-one/authtoken.secret")
  44. if err == nil {
  45. log.Println("Zerotier authkey loaded")
  46. authKey = string(b)
  47. } else {
  48. log.Println("Unable to read authkey at /var/lib/zerotier-one/authtoken.secret: ", err.Error())
  49. }
  50. }
  51. } else if runtime.GOOS == "darwin" {
  52. b, err := os.ReadFile("/Library/Application Support/ZeroTier/One/authtoken.secret")
  53. if err == nil {
  54. log.Println("Zerotier authkey loaded")
  55. authKey = string(b)
  56. } else {
  57. log.Println("Unable to read authkey at /Library/Application Support/ZeroTier/One/authtoken.secret ", err.Error())
  58. }
  59. }
  60. authKey = strings.TrimSpace(authKey)
  61. if authKey == "" {
  62. //Ask user for input
  63. reader := bufio.NewReader(os.Stdin)
  64. fmt.Println("Please enter the Zerotier authtoken manually: ")
  65. input, _ := reader.ReadString('\n')
  66. return strings.TrimSpace(input)
  67. }
  68. return ""
  69. }
  70. //Use sudo to read auth token on linux like systems
  71. func readAuthTokenAsRoot() (string, error) {
  72. cmd := exec.Command("sudo", "cat", "/var/lib/zerotier-one/authtoken.secret")
  73. output, err := cmd.Output()
  74. if err != nil {
  75. return "", err
  76. }
  77. fmt.Println("CMDOUTPUT", string(output))
  78. return string(output), nil
  79. }
  80. //Check if the user is root on linux
  81. func isRoot() bool {
  82. currentUser, err := user.Current()
  83. if err != nil {
  84. return false
  85. }
  86. return currentUser.Username == "root"
  87. }
  88. //Use admin permission to read auth token on Windows
  89. func readAuthTokenAsAdmin() (string, error) {
  90. verb := "runas"
  91. exe, _ := os.Executable()
  92. cwd, _ := os.Getwd()
  93. authTokenPath := "C:\\ProgramData\\ZeroTier\\One\\authtoken.secret"
  94. args := fmt.Sprintf("cmd /C type %s", authTokenPath)
  95. verbPtr, _ := syscall.UTF16PtrFromString(verb)
  96. exePtr, _ := syscall.UTF16PtrFromString(exe)
  97. cwdPtr, _ := syscall.UTF16PtrFromString(cwd)
  98. argPtr, _ := syscall.UTF16PtrFromString(args)
  99. var showCmd int32 = 1 //SW_NORMAL
  100. err := windows.ShellExecute(0, verbPtr, exePtr, argPtr, cwdPtr, showCmd)
  101. if err != nil {
  102. return "", err
  103. }
  104. return "", nil
  105. }
  106. //Check if admin on Windows
  107. func isAdmin() bool {
  108. _, err := os.Open("\\\\.\\PHYSICALDRIVE0")
  109. if err != nil {
  110. return false
  111. }
  112. return true
  113. }