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Clean paths when looking in Storage (#19124)

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* Clean paths when looking in Storage

Ensure paths are clean for minio aswell as local storage.

Use url.Path not RequestURI/EscapedPath in storageHandler.

Signed-off-by: Andrew Thornton <art27@cantab.net>

* Apply suggestions from code review

Co-authored-by: Lauris BH <lauris@nix.lv>
This commit is contained in:
zeripath 2022-03-22 21:02:26 +00:00 • committed by GitHub
parent d2c165811a
commit 3f71ab9a12
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4 changed files with 40 additions and 51 deletions
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34
modules/storage/local.go
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@ -6,7 +6,6 @@ package storage
import (
"context"
"errors"
"io"
"net/url"
"os"
@ -18,8 +17,6 @@ import (
"code.gitea.io/gitea/modules/util"
)
// ErrLocalPathNotSupported represents an error that path is not supported
var ErrLocalPathNotSupported = errors.New("local path is not supported")
var _ ObjectStorage = &LocalStorage{}
// LocalStorageType is the type descriptor for local storage
@ -62,21 +59,18 @@ func NewLocalStorage(ctx context.Context, cfg interface{}) (ObjectStorage, error
}, nil
}
func (l *LocalStorage) buildLocalPath(p string) string {
return filepath.Join(l.dir, path.Clean("/" + strings.ReplaceAll(p, "\\", "/"))[1:])
}
// Open a file
func (l *LocalStorage) Open(path string) (Object, error) {
if !isLocalPathValid(path) {
return nil, ErrLocalPathNotSupported
}
return os.Open(filepath.Join(l.dir, path))
return os.Open(l.buildLocalPath(path))
}
// Save a file
func (l *LocalStorage) Save(path string, r io.Reader, size int64) (int64, error) {
if !isLocalPathValid(path) {
return 0, ErrLocalPathNotSupported
}
p := filepath.Join(l.dir, path)
p := l.buildLocalPath(path)
if err := os.MkdirAll(filepath.Dir(p), os.ModePerm); err != nil {
return 0, err
}
@ -116,24 +110,12 @@ func (l *LocalStorage) Save(path string, r io.Reader, size int64) (int64, error)
// Stat returns the info of the file
func (l *LocalStorage) Stat(path string) (os.FileInfo, error) {
return os.Stat(filepath.Join(l.dir, path))
}
func isLocalPathValid(p string) bool {
a := path.Clean(p)
if strings.HasPrefix(a, "../") || strings.HasPrefix(a, "..\\") {
return false
}
return a == p
return os.Stat(l.buildLocalPath(path))
}
// Delete delete a file
func (l *LocalStorage) Delete(path string) error {
if !isLocalPathValid(path) {
return ErrLocalPathNotSupported
}
p := filepath.Join(l.dir, path)
return util.Remove(p)
return util.Remove(l.buildLocalPath(path))
}
// URL gets the redirect URL to a file