Java Key Public getPublicKey(String certificatePath)

Description

get Public Key

License

Open Source License

Declaration

public static PublicKey getPublicKey(String certificatePath) throws Exception 

Method Source Code

//package com.java2s;

import java.io.FileInputStream;

import java.security.KeyStore;

import java.security.PublicKey;

import java.security.cert.Certificate;

import java.security.cert.CertificateFactory;

public class Main {
    public static final String KEY_STORE = "JKS";
    private static final String X509 = "X.509";

    public static PublicKey getPublicKey(String certificatePath) throws Exception {
        Certificate certificate = getCertificate(certificatePath);
        PublicKey key = certificate.getPublicKey();
        return key;
    }/*from w  ww  .  j ava 2  s  . com*/

    public 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;
    }

    public static Certificate getCertificate(String keyStorePath, String alias, String password) throws Exception {
        KeyStore ks = getKeyStore(keyStorePath, password);
        Certificate certificate = ks.getCertificate(alias);

        return certificate;
    }

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

Related

1. getPublicKey(KeyStore keyStore, String alias)
2. getPublicKey(KeyStore keyStore, String alias, char[] password)
3. getPublicKey(KeyStore ks, String alias, char[] password)
4. getPublicKey(String algo)
5. getPublicKey(String alias)
6. getPublicKey(String certPath)
7. getPublicKey(String filename)
8. getPublicKey(String filename)
9. getPublicKey(String filename)