min-dev-java/src/main/java/minsecurity/certificate/X509/X509CertUtil.java

package minsecurity.certificate.X509;

import java.security.*;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
import java.util.Date;

/*
 * @Author: hongyu guo
 * @Description:
 * @Version: 1.0.0
 * @Date: 15:59 2021/03/05
 * @Copyright: MIN-Group；国家重大科技基础设施——未来网络北大实验室；深圳市信息论与未来网络重点实验室
 */
public class X509CertUtil {

    public static boolean verify(X509Certificate certificate, PublicKey publicKey){
        try {
            certificate.verify(publicKey);

        } catch (CertificateException | NoSuchAlgorithmException |
                InvalidKeyException | NoSuchProviderException | SignatureException e) {
            e.printStackTrace();
            return false;
        }
        return true;
    }

    public static boolean isExpired(X509Certificate certificate){
        Date notAfter = certificate.getNotAfter();
        Date notBefore = certificate.getNotBefore();
        long now = System.currentTimeMillis();
        return now < notBefore.getTime() || now > notAfter.getTime();
    }

    public static boolean isValid(X509Certificate certificate, PublicKey publicKey){
        boolean isExpired = isExpired(certificate);
        boolean isVerify = verify(certificate, publicKey);
        return !isExpired & isVerify;
    }

}