package verifyDun

import (
	"crypto/md5"
	"encoding/hex"
	"net/url"
	"sort"
)

const (
	apiUrl    = "https://verify.dun.163.com" // 本机认证服务身份证实人认证在线检测接口地址
	version   = "v1"
	secretId  = "0bcf9a5633eb9ca9d196583e67c3762b" // 产品密钥ID，产品标识
	secretKey = "b31e8220d115b6531a22ee71d1e89936" // 产品私有密钥，服务端生成签名信息使用，请严格保管，避免泄露
)

// GenSignature 生成签名信息
func GenSignature(params url.Values) string {
	var paramStr string
	keys := make([]string, 0, len(params))
	for k := range params {
		keys = append(keys, k)
	}
	sort.Strings(keys)
	for _, key := range keys {
		paramStr += key + params[key][0]
	}
	paramStr += secretKey
	md5Reader := md5.New()
	md5Reader.Write([]byte(paramStr))
	return hex.EncodeToString(md5Reader.Sum(nil))
}