專案中時長會遇到需要獲取字元或者檔案摘要（MD5,Sha1,Hmac）資訊的需求，用於儲存驗證資訊或者判斷完整性等，以下為整理後的golang相關實現

package encrypt

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

func Md5String(data string) string {
	md5 := md5.New()
	md5.Write([]byte(data))
	md5Data := md5.Sum([]byte(nil))
	return hex.EncodeToString(md5Data)
}

func Md5(data []byte) string {
	md5 := md5.New()
	md5.Write(data)
	md5Data := md5.Sum([]byte(nil))
	return hex.EncodeToString(md5Data)
}

func HmacString(key string, data string) string {
	hmac := hmac.New(md5.New, []byte(key))
	hmac.Write([]byte(data))
	return hex.EncodeToString(hmac.Sum([]byte(nil)))
}

func HmacByStringKey(key string, data []byte) string {
	return Hmac([]byte(key), data)
}

func Hmac(key []byte, data []byte) string {
	hmac := hmac.New(md5.New, key)
	hmac.Write(data)
	return hex.EncodeToString(hmac.Sum([]byte(nil)))
}

func Sha1String(data string) string {
	sha1 := sha1.New()
	sha1.Write([]byte(data))
	return hex.EncodeToString(sha1.Sum([]byte(nil)))
}

func Sha1(data []byte) string {
	sha1 := sha1.New()
	sha1.Write(data)
	return hex.EncodeToString(sha1.Sum([]byte(nil)))
}