verify Certificate - Java Security

Java examples for Security:Certificate

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Description

verify Certificate

Demo Code


//package com.java2s;

import java.io.FileInputStream;

import java.security.KeyStore;

import java.security.cert.Certificate;
import java.security.cert.CertificateFactory;
import java.security.cert.X509Certificate;
import java.util.Date;

public class Main {

    public static final String KEY_STORE = "JKS";
    public static final String X509 = "X.509";

    public static boolean verifyCertificate(Certificate certificate) {
        return verifyCertificate(new Date(), certificate);
    }//  ww  w .  jav  a  2 s.c o  m

    public static boolean verifyCertificate(Date date,
            Certificate certificate) {
        boolean isValid = true;
        try {
            X509Certificate x509Certificate = (X509Certificate) certificate;
            x509Certificate.checkValidity(date);
        } catch (Exception e) {
            isValid = false;
        }
        return isValid;
    }

    public static boolean verifyCertificate(Date date,
            String certificatePath) {
        Certificate certificate;
        try {
            certificate = getCertificate(certificatePath);
            return verifyCertificate(certificate);
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
    }

    public static boolean verifyCertificate(Date date, String keyStorePath,
            String alias, String password) {
        Certificate certificate;
        try {
            certificate = getCertificate(keyStorePath, alias, password);
            return verifyCertificate(certificate);
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
    }

    public static boolean verifyCertificate(String keyStorePath,
            String alias, String password) {
        return verifyCertificate(new Date(), keyStorePath, alias, password);
    }

    public static boolean verifyCertificate(String certificatePath) {
        return verifyCertificate(new Date(), certificatePath);
    }

    private static Certificate getCertificate(String certificatePath)
            throws Exception {
        CertificateFactory certificateFactory = CertificateFactory
                .getInstance(X509);
        FileInputStream in = new FileInputStream(certificatePath);
        Certificate certificate = certificateFactory
                .generateCertificate(in);
        in.close();
        return certificate;
    }

    private static Certificate getCertificate(String keyStorePath,
            String alias, String password) throws Exception {
        KeyStore keyStore = getKeyStore(keyStorePath, password);
        Certificate certificate = keyStore.getCertificate(alias);
        return certificate;
    }

    private static KeyStore getKeyStore(String keyStorePath, String password)
            throws Exception {
        FileInputStream in = new FileInputStream(keyStorePath);
        KeyStore keyStore = KeyStore.getInstance(KEY_STORE);
        keyStore.load(in, password.toCharArray());
        in.close();
        return keyStore;
    }
}

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