server/paths.go

   1 //
   2 // Armadillo File Manager
   3 // Copyright (c) 2010-2012, Robert Sesek <http://www.bluestatic.org>
   4 //
   5 // This program is free software: you can redistribute it and/or modify it under
   6 // the terms of the GNU General Public License as published by the Free Software
   7 // Foundation, either version 3 of the License, or any later version.
   8 //
   9
  10 package server
  11
  12 import (
  13         "../config"
  14         "errors"
  15         "os"
  16         "path"
  17         "strings"
  18 )
  19
  20 var gConfig *config.Configuration
  21
  22 func SetConfig(aConfig *config.Configuration) {
  23         gConfig = aConfig
  24 }
  25
  26 func canonicalizePath(raw_path string) string {
  27         raw_path = path.Join(gConfig.JailRoot, raw_path)
  28         return path.Clean(raw_path)
  29 }
  30
  31 func checkInJail(the_path string) bool {
  32         if len(the_path) < len(gConfig.JailRoot) {
  33                 return false
  34         }
  35         if the_path[0:len(gConfig.JailRoot)] != gConfig.JailRoot {
  36                 return false
  37         }
  38         if strings.Index(the_path, "../") != -1 {
  39                 return false
  40         }
  41         return true
  42 }
  43
  44 func IsValid(path string) (bool, string) {
  45         path = canonicalizePath(path)
  46         _, err := os.Lstat(path)
  47         return err == nil && checkInJail(path), path
  48 }
  49
  50 func List(the_path string) (files []string, err error) {
  51         full_path := canonicalizePath(the_path)
  52         if !checkInJail(full_path) {
  53                 return nil, errors.New("Path outside of jail")
  54         }
  55
  56         fd, file_error := os.Open(full_path)
  57         if file_error != nil {
  58                 return nil, file_error
  59         }
  60         defer fd.Close()
  61
  62         fileinfos, read_err := fd.Readdir(-1)
  63         if read_err != nil {
  64                 return nil, read_err
  65         }
  66
  67         for _, info := range fileinfos {
  68                 name := info.Name
  69                 if info.IsDirectory() {
  70                         name += "/"
  71                 }
  72                 if !gConfig.IncludeDotfiles && name[0] == '.' {
  73                         continue
  74                 }
  75                 files = append(files, name)
  76         }
  77         return files, nil
  78 }
  79
  80 func Remove(the_path string) error {
  81         full_path := canonicalizePath(the_path)
  82         if !checkInJail(full_path) {
  83                 return errors.New("Path outside of jail")
  84         }
  85         return os.RemoveAll(full_path)
  86 }
  87
  88 func Move(source string, target string) error {
  89         source = canonicalizePath(source)
  90         target = canonicalizePath(target)
  91         if !checkInJail(source) {
  92                 return errors.New("Source outside of jail")
  93         }
  94         if !checkInJail(target) {
  95                 return errors.New("Target outside of jail")
  96         }
  97         return os.Rename(source, target)
  98 }
  99
 100 func MakeDir(target string) error {
 101         target = canonicalizePath(target)
 102         if !checkInJail(target) {
 103                 return errors.New("Path outside of jail")
 104         }
 105         return os.Mkdir(target, 0755)
 106 }