Zoraxy/mod/acme/utils.go

package acme

import (
	"crypto/x509"
	"encoding/pem"
	"fmt"
	"io/ioutil"
)

// Get the issuer name from pem file
func ExtractIssuerNameFromPEM(pemFilePath string) (string, error) {
	// Read the PEM file
	pemData, err := ioutil.ReadFile(pemFilePath)
	if err != nil {
		return "", err
	}

	// Parse the PEM block
	block, _ := pem.Decode(pemData)
	if block == nil || block.Type != "CERTIFICATE" {
		return "", fmt.Errorf("failed to decode PEM block containing certificate")
	}

	// Parse the certificate
	cert, err := x509.ParseCertificate(block.Bytes)
	if err != nil {
		return "", fmt.Errorf("failed to parse certificate: %v", err)
	}

	// Extract the issuer name
	issuer := cert.Issuer.Organization[0]

	return issuer, nil
}