How to Get Java to Ignore the "Trust Store" and Just Accept Whatever Ssl Certificate It Gets

Is it possible to get Java to ignore the trust store and just accept whatever SSL certificate it gets?

You need to create a fake TrustManager that accepts all certificates, and register it as a manager. Something like this:

public class MyManager implements com.sun.net.ssl.X509TrustManager {
  public boolean isClientTrusted(X509Certificate[] chain) { return true; }
  public boolean isHostTrusted(X509Certificate[] chain) { return true; }
  ...
}

com.sun.net.ssl.TrustManager[] managers =
  new com.sun.net.ssl.TrustManager[] {new MyManager()};

com.sun.net.ssl.SSLContext.getInstance("SSL").
       .init(null, managers, new SecureRandom());

Accept server's self-signed ssl certificate in Java client

You have basically two options here: add the self-signed certificate to your JVM truststore or configure your client to

Option 1

Export the certificate from your browser and import it in your JVM truststore (to establish a chain of trust):

<JAVA_HOME>\bin\keytool -import -v -trustcacerts
-alias server-alias -file server.cer
-keystore cacerts.jks -keypass changeit
-storepass changeit 

Option 2

Disable Certificate Validation (code from Example Depot):

// Create a trust manager that does not validate certificate chains
TrustManager[] trustAllCerts = new TrustManager[] { 
    new X509TrustManager() {     
        public java.security.cert.X509Certificate[] getAcceptedIssuers() { 
            return new X509Certificate[0];
        } 
        public void checkClientTrusted( 
            java.security.cert.X509Certificate[] certs, String authType) {
            } 
        public void checkServerTrusted( 
            java.security.cert.X509Certificate[] certs, String authType) {
        }
    } 
}; 

// Install the all-trusting trust manager
try {
    SSLContext sc = SSLContext.getInstance("SSL"); 
    sc.init(null, trustAllCerts, new java.security.SecureRandom()); 
    HttpsURLConnection.setDefaultSSLSocketFactory(sc.getSocketFactory());
} catch (GeneralSecurityException e) {
} 
// Now you can access an https URL without having the certificate in the truststore
try { 
    URL url = new URL("https://hostname/index.html"); 
} catch (MalformedURLException e) {
} 

Note that I do not recommend the Option #2 at all. Disabling the trust manager defeats some parts of SSL and makes you vulnerable to man in the middle attacks. Prefer Option #1 or, even better, have the server use a "real" certificate signed by a well known CA.

How to bypass ssl certificate checking in java

Using X509ExtendedTrustManager instead of X509TrustManager() solved the problem. Here's the example:

public void trustAllHosts()
    {
        try
        {
            TrustManager[] trustAllCerts = new TrustManager[]{
                    new X509ExtendedTrustManager()
                    {
                        @Override
                        public java.security.cert.X509Certificate[] getAcceptedIssuers()
                        {
                            return null;
                        }

                        @Override
                        public void checkClientTrusted(java.security.cert.X509Certificate[] certs, String authType)
                        {
                        }

                        @Override
                        public void checkServerTrusted(java.security.cert.X509Certificate[] certs, String authType)
                        {
                        }

                        @Override
                        public void checkClientTrusted(java.security.cert.X509Certificate[] xcs, String string, Socket socket) throws CertificateException
                        {

                        }

                        @Override
                        public void checkServerTrusted(java.security.cert.X509Certificate[] xcs, String string, Socket socket) throws CertificateException
                        {

                        }

                        @Override
                        public void checkClientTrusted(java.security.cert.X509Certificate[] xcs, String string, SSLEngine ssle) throws CertificateException
                        {

                        }

                        @Override
                        public void checkServerTrusted(java.security.cert.X509Certificate[] xcs, String string, SSLEngine ssle) throws CertificateException
                        {

                        }

                    }
            };

            SSLContext sc = SSLContext.getInstance("SSL");
            sc.init(null, trustAllCerts, new java.security.SecureRandom());
            HttpsURLConnection.setDefaultSSLSocketFactory(sc.getSocketFactory());

            // Create all-trusting host name verifier
            HostnameVerifier allHostsValid = new  HostnameVerifier()
            {
                @Override
                public boolean verify(String hostname, SSLSession session)
                {
                    return true;
                }
            };
            // Install the all-trusting host verifier
            HttpsURLConnection.setDefaultHostnameVerifier(allHostsValid);
        }
        catch (Exception e)
        {
            log.error("Error occurred",e);
        }
    }

Allow java trust store to accept all SSL certificates?

After looking at your errors I think the problem is you have put the code directly in the class block, but it is supposed to be put in a method like this:

// package here
// imports here
public class SecurityCheck
{
    public void test() throws NoSuchAlgorithmException, KeyManagementException
                              // and any other exception here
    {
        // alternatively to throwing the exceptions to the caller,
        // you can handle them here using a try-catch-block

        // code from answer you linked to here
    }
}

I have not tried it and I don't know if this are the only problems, but it would explain the errors you get. The first lines are variable declarations and initializations valid in a class body, but the line sc.init(null, new TrustManager[] { trm }, null); is not (as it is a statement) and needs to be in a method. This is also the reason the errors start at this line.

Ignoring SSL certificate in Apache HttpClient 4.3

The code below works for trusting self-signed certificates. You have to use the TrustSelfSignedStrategy when creating your client:

SSLContextBuilder builder = new SSLContextBuilder();
builder.loadTrustMaterial(null, new TrustSelfSignedStrategy());
SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(
        builder.build());
CloseableHttpClient httpclient = HttpClients.custom().setSSLSocketFactory(
        sslsf).build();

HttpGet httpGet = new HttpGet("https://some-server");
CloseableHttpResponse response = httpclient.execute(httpGet);
try {
    System.out.println(response.getStatusLine());
    HttpEntity entity = response.getEntity();
    EntityUtils.consume(entity);
} finally {
    response.close();
}

I did not include the SSLConnectionSocketFactory.ALLOW_ALL_HOSTNAME_VERIFIER on purpose: The point was to allow testing with self signed certificates so you don't have to acquire a proper certificate from a certification authority. You can easily create a self-signed certificate with the correct host name, so do that instead of adding the SSLConnectionSocketFactory.ALLOW_ALL_HOSTNAME_VERIFIER flag.

Trusting all certificates using HttpClient over HTTPS

Note: Do not implement this in production code you are ever going to use on a network you do not entirely trust. Especially anything going over the public internet.

Your question is just what I want to know. After I did some searches, the conclusion is as follows.

In HttpClient way, you should create a custom class from org.apache.http.conn.ssl.SSLSocketFactory, not the one org.apache.http.conn.ssl.SSLSocketFactory
itself. Some clues can be found in this post Custom SSL handling stopped working on Android 2.2 FroYo.

An example is like ...

import java.io.IOException;
import java.net.Socket;
import java.net.UnknownHostException;
import java.security.KeyManagementException;
import java.security.KeyStore;
import java.security.KeyStoreException;
import java.security.NoSuchAlgorithmException;
import java.security.UnrecoverableKeyException;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;

import javax.net.ssl.SSLContext;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;

import org.apache.http.conn.ssl.SSLSocketFactory;
public class MySSLSocketFactory extends SSLSocketFactory {
    SSLContext sslContext = SSLContext.getInstance("TLS");

    public MySSLSocketFactory(KeyStore truststore) throws NoSuchAlgorithmException, KeyManagementException, KeyStoreException, UnrecoverableKeyException {
        super(truststore);

        TrustManager tm = new X509TrustManager() {
            public void checkClientTrusted(X509Certificate[] chain, String authType) throws CertificateException {
            }

            public void checkServerTrusted(X509Certificate[] chain, String authType) throws CertificateException {
            }

            public X509Certificate[] getAcceptedIssuers() {
                return null;
            }
        };

        sslContext.init(null, new TrustManager[] { tm }, null);
    }

    @Override
    public Socket createSocket(Socket socket, String host, int port, boolean autoClose) throws IOException, UnknownHostException {
        return sslContext.getSocketFactory().createSocket(socket, host, port, autoClose);
    }

    @Override
    public Socket createSocket() throws IOException {
        return sslContext.getSocketFactory().createSocket();
    }
}

and use this class while creating instance of HttpClient.

public HttpClient getNewHttpClient() {
    try {
        KeyStore trustStore = KeyStore.getInstance(KeyStore.getDefaultType());
        trustStore.load(null, null);

        MySSLSocketFactory sf = new MySSLSocketFactory(trustStore);
        sf.setHostnameVerifier(SSLSocketFactory.ALLOW_ALL_HOSTNAME_VERIFIER);

        HttpParams params = new BasicHttpParams();
        HttpProtocolParams.setVersion(params, HttpVersion.HTTP_1_1);
        HttpProtocolParams.setContentCharset(params, HTTP.UTF_8);

        SchemeRegistry registry = new SchemeRegistry();
        registry.register(new Scheme("http", PlainSocketFactory.getSocketFactory(), 80));
        registry.register(new Scheme("https", sf, 443));

        ClientConnectionManager ccm = new ThreadSafeClientConnManager(params, registry);

        return new DefaultHttpClient(ccm, params);
    } catch (Exception e) {
        return new DefaultHttpClient();
    }
}

BTW, the link below is for someone who is looking for HttpURLConnection solution.
Https Connection Android

I have tested the above two kinds of solutions on froyo, and they all work like a charm in my cases. Finally, using HttpURLConnection may face the redirect problems, but this is beyond the topic.

Note: Before you decide to trust all certificates, you probably should know the site full well and won't be harmful of it to end-user.

Indeed, the risk you take should be considered carefully, including the effect of hacker's mock site mentioned in the following comments that I deeply appreciated. In some situation, although it might be hard to take care of all certificates, you'd better know the implicit drawbacks to trust all of them.

Ignore self-signed ssl cert using Jersey Client

After some searching and trawling through some old stackoverflow questions I've found a solution in a previously asked SO question:

• Question: Java client certificates over HTTPS/SSL
• Answer Java client certificates over HTTPS/SSL

Here's the code that I ended up using.

// Create a trust manager that does not validate certificate chains
TrustManager[] trustAllCerts = new TrustManager[]{new X509TrustManager(){
    public X509Certificate[] getAcceptedIssuers(){return null;}
    public void checkClientTrusted(X509Certificate[] certs, String authType){}
    public void checkServerTrusted(X509Certificate[] certs, String authType){}
}};

// Install the all-trusting trust manager
try {
    SSLContext sc = SSLContext.getInstance("TLS");
    sc.init(null, trustAllCerts, new SecureRandom());
    HttpsURLConnection.setDefaultSSLSocketFactory(sc.getSocketFactory());
} catch (Exception e) {
    ;
}

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