package utils

import (
	"fmt"
	"io/ioutil"
	"log"
)

// getMchCertSN 提取证书序列号
func getMchCertSN(certPath string) (string, error) {
	certData, err := ioutil.ReadFile(certPath)
	if err != nil {
		log.Fatalf("Failed to read the cert file: %s", err)
	}

	cert, err := getCert(certData)
	if err != nil {
		return "", fmt.Errorf("failed to parse certificate: %v", err)
	}

	return md5Hash(cert.Issuer.ToRDNSequence().String() + cert.SerialNumber.String()), nil
}