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         "errors"
  14         "os"
  15         "path"
  16         "strings"
  17 )
  18
  19 func canonicalizePath(raw_path string) string {
  20         raw_path = path.Join(gConfig.JailRoot, raw_path)
  21         return path.Clean(raw_path)
  22 }
  23
  24 func checkInJail(the_path string) bool {
  25         if len(the_path) < len(gConfig.JailRoot) {
  26                 return false
  27         }
  28         if the_path[0:len(gConfig.JailRoot)] != gConfig.JailRoot {
  29                 return false
  30         }
  31         if strings.Index(the_path, "../") != -1 {
  32                 return false
  33         }
  34         return true
  35 }
  36
  37 func IsValidPath(path string) (bool, string) {
  38         path = canonicalizePath(path)
  39         _, err := os.Lstat(path)
  40         return err == nil && checkInJail(path), path
  41 }
  42
  43 func ListPath(the_path string) (files []string, err error) {
  44         full_path := canonicalizePath(the_path)
  45         if !checkInJail(full_path) {
  46                 return nil, errors.New("Path outside of jail")
  47         }
  48
  49         fd, file_error := os.Open(full_path)
  50         if file_error != nil {
  51                 return nil, file_error
  52         }
  53         defer fd.Close()
  54
  55         fileinfos, read_err := fd.Readdir(-1)
  56         if read_err != nil {
  57                 return nil, read_err
  58         }
  59
  60         files = make([]string, 0)
  61         for _, info := range fileinfos {
  62                 name := info.Name()
  63                 if info.IsDir() {
  64                         name += "/"
  65                 }
  66                 if !gConfig.IncludeDotfiles && name[0] == '.' {
  67                         continue
  68                 }
  69                 files = append(files, name)
  70         }
  71         return files, nil
  72 }
  73
  74 func RemovePath(the_path string) error {
  75         full_path := canonicalizePath(the_path)
  76         if !checkInJail(full_path) {
  77                 return errors.New("Path outside of jail")
  78         }
  79         return os.RemoveAll(full_path)
  80 }
  81
  82 func MovePath(source string, target string) error {
  83         source = canonicalizePath(source)
  84         target = canonicalizePath(target)
  85         if !checkInJail(source) {
  86                 return errors.New("Source outside of jail")
  87         }
  88         if !checkInJail(target) {
  89                 return errors.New("Target outside of jail")
  90         }
  91         return os.Rename(source, target)
  92 }
  93
  94 func MakeDir(target string) error {
  95         target = canonicalizePath(target)
  96         if !checkInJail(target) {
  97                 return errors.New("Path outside of jail")
  98         }
  99         return os.Mkdir(target, 0755)
 100 }