/*
 Copyright 2022 The KubeSphere Authors.

 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 hash implements hash utilities
package hash

import (
	"crypto/md5" // #nosec
	"crypto/sha256"
	"fmt"
	"io"
	"os"
	"path/filepath"
)

// FileMD5 count file md5
func FileMD5(path string) (string, error) {
	file, err := os.Open(filepath.Clean(path))
	if err != nil {
		return "", err
	}
	defer file.Close()

	m := md5.New() // #nosec
	if _, err := io.Copy(m, file); err != nil {
		return "", err
	}

	fileMd5 := fmt.Sprintf("%x", m.Sum(nil))
	return fileMd5, nil
}

// FileSHA256 count file sha256
func FileSHA256(path string) (string, error) {
	file, err := os.Open(filepath.Clean(path))
	if err != nil {
		return "", err
	}
	defer file.Close()

	s := sha256.New()
	if _, err := io.Copy(s, file); err != nil {
		return "", err
	}

	return fmt.Sprintf("%x", s.Sum(nil)), nil
}