util/archive: assume roblox's zip files are safe to use

may solve #69

util/archive.go

@@ -2,7 +2,6 @@ package util
 
 import (
 	"archive/zip"
-	"fmt"
 	"io"
 	"os"
 	"path/filepath"
@@ -18,11 +17,7 @@ func Unzip(source string, destDir string) error {
 
 	for _, file := range zip.File {
 		// Roblox's Zip Files have windows paths in them
-		filePath := filepath.Join(destDir, strings.ReplaceAll(file.Name, `\`, "/"))
-
-		if !strings.HasPrefix(filePath, filepath.Clean(destDir)+string(os.PathSeparator)) {
-			return fmt.Errorf("illegal file path: %s", filePath)
-		}
+		filePath := filepath.Join(destDir, filepath.Clean(strings.ReplaceAll(file.Name, `\`, "/")))
 
 		if file.FileInfo().IsDir() {
 			if err := os.MkdirAll(filePath, file.Mode()); err != nil {