package util

import (
	"crypto/md5"
	"errors"
	"golang.org/x/crypto/bcrypt"
)

func PasswordEncode(userPassword string) (string, error) {
	md5Password := md5.Sum([]byte(userPassword))
	encode, err := generatePassword(string(md5Password[:]))
	if err != nil {
		return "", errors.New("密码加密失败")
	} else {
		return string(encode), nil
	}
}
func PasswordValidateCode(userPassword string, hashed string) (isOK bool, err error) {
	md5Password := md5.Sum([]byte(userPassword))
	isOk, err := validatePassword(string(md5Password[:]), hashed)
	return isOk, err
}

// generatePassword 给密码就行加密操作
func generatePassword(userPassword string) ([]byte, error) {
	return bcrypt.GenerateFromPassword([]byte(userPassword), bcrypt.DefaultCost)
}

// validatePassword 密码比对
func validatePassword(userPassword string, hashed string) (isOK bool, err error) {
	if err = bcrypt.CompareHashAndPassword([]byte(hashed), []byte(userPassword)); err != nil {
		return false, errors.New("密码错误！")
	}
	return true, nil

}