// Copyright 2023 Chainguard, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package apk

import (
	"fmt"
	"path/filepath"
	"strings"
)

// Sanitize archive file pathing from "G305: Zip Slip vulnerability"
func sanitizeArchivePath(d, t string) (v string, err error) {
	v = filepath.Join(d, t)

	// top level content have a directory of "". filepath.Clean("") returns .
	if d == "" || strings.HasPrefix(v, filepath.Clean(d)) {
		return v, nil
	}

	return "", fmt.Errorf("%s: %s", "content filepath is tainted", t)
}
