// Copyright 2019 github.com. All rights reserved.
// Use of this source code is governed by github.com.

package util

import (
	"crypto/hmac"
	"crypto/md5"
	"crypto/sha1"
	"crypto/sha256"
	"encoding/hex"
)

// MD5 将字符串 s 进行 md5 编码
func MD5(s string) string {
	m := md5.New()
	m.Write([]byte(s))
	return hex.EncodeToString(m.Sum(nil))
}

// SHA256 将字符串 s 进行 SHA256 编码
func SHA256(s string) string {
	h := sha256.New()
	h.Write([]byte(s))
	return hex.EncodeToString(h.Sum(nil))
}

// HMACBySHA1 将字符串 s 进行 以SHA1算法生成 HMAC (哈希运算消息认证码)
func HMACBySHA1(s, key string) []byte {
	bkey := []byte(key)
	mac := hmac.New(sha1.New, bkey)
	mac.Write([]byte(s))
	return mac.Sum(nil)
}