diff options
Diffstat (limited to 'vendor/github.com/cyphar/filepath-securejoin/join.go')
| -rw-r--r-- | vendor/github.com/cyphar/filepath-securejoin/join.go | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/vendor/github.com/cyphar/filepath-securejoin/join.go b/vendor/github.com/cyphar/filepath-securejoin/join.go index 7dd08dbbd..aa32b85fb 100644 --- a/vendor/github.com/cyphar/filepath-securejoin/join.go +++ b/vendor/github.com/cyphar/filepath-securejoin/join.go @@ -39,17 +39,27 @@ func IsNotExist(err error) bool { // components in the returned string are not modified (in other words are not // replaced with symlinks on the filesystem) after this function has returned. // Such a symlink race is necessarily out-of-scope of SecureJoin. +// +// Volume names in unsafePath are always discarded, regardless if they are +// provided via direct input or when evaluating symlinks. Therefore: +// +// "C:\Temp" + "D:\path\to\file.txt" results in "C:\Temp\path\to\file.txt" func SecureJoinVFS(root, unsafePath string, vfs VFS) (string, error) { // Use the os.* VFS implementation if none was specified. if vfs == nil { vfs = osVFS{} } + unsafePath = filepath.FromSlash(unsafePath) var path bytes.Buffer n := 0 for unsafePath != "" { if n > 255 { - return "", &os.PathError{Op: "SecureJoin", Path: root + "/" + unsafePath, Err: syscall.ELOOP} + return "", &os.PathError{Op: "SecureJoin", Path: root + string(filepath.Separator) + unsafePath, Err: syscall.ELOOP} + } + + if v := filepath.VolumeName(unsafePath); v != "" { + unsafePath = unsafePath[len(v):] } // Next path component, p. |