Exception : javax.net.ssl.SSLPeerUnverifiedException: peer not authenticated

public HttpClientVM() {

    BasicHttpParams params = new BasicHttpParams();
    ConnManagerParams.setMaxTotalConnections(params, 10);
    HttpProtocolParams.setVersion(params, HttpVersion.HTTP_1_1);
    HttpProtocolParams.setUseExpectContinue(params, false);
    HttpConnectionParams.setStaleCheckingEnabled(params, true);
    HttpConnectionParams.setConnectionTimeout(params, 30000);
    HostnameVerifier hostnameVerifier=
          org.apache.http.conn.ssl.SSLSocketFactory.ALLOW_ALL_HOSTNAME_VERIFIER;
    HttpsURLConnection.setDefaultHostnameVerifier(hostnameVerifier);
    SSLSocketFactory socketFactory = SSLSocketFactory.getSocketFactory();
    socketFactory.setHostnameVerifier((X509HostnameVerifier) hostnameVerifier);
    SchemeRegistry schemeRegistry = new SchemeRegistry();
    schemeRegistry.register(new Scheme("http",socketFactory, 80));
    schemeRegistry.register(new Scheme("https",socketFactory, 443));
		ThreadSafeClientConnManager manager = new ThreadSafeClientConnManager(params, schemeRegistry);
		// Set verifier     
		client = new DefaultHttpClient(manager, params);	
	}

Problem:

When executing client.accessURL(url), the following error occurs:

Exception in thread "main" javax.net.ssl.SSLPeerUnverifiedException: peer not authenticated
	at com.sun.net.ssl.internal.ssl.SSLSessionImpl.getPeerCertificates(SSLSessionImpl.java:352)
	at org.apache.http.conn.ssl.AbstractVerifier.verify(AbstractVerifier.java:128)
	at org.apache.http.conn.ssl.SSLSocketFactory.connectSocket(SSLSocketFactory.java:397)
	at org.apache.http.conn.ssl.SSLSocketFactory.connectSocket(SSLSocketFactory.java:495)
	at org.apache.http.conn.scheme.SchemeSocketFactoryAdaptor.connectSocket(SchemeSocketFactoryAdaptor.java:62)
	at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:148)
	at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:150)
	at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:121)
	at org.apache.http.impl.client.DefaultRequestDirector.tryConnect(DefaultRequestDirector.java:575)
	at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:425)
	at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:820)
	at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:754)
	at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:732)

Additional information:

• Window 7
• HttpClient 4

Expired certificate was the cause of our "javax.net.ssl.SSLPeerUnverifiedException: peer not authenticated".

> keytool -list -v -keystore filetruststore.ts

    Enter keystore password:
    Keystore type: JKS
    Keystore provider: SUN
    Your keystore contains 1 entry
    Alias name: somealias
    Creation date: Jul 26, 2012
    Entry type: PrivateKeyEntry
    Certificate chain length: 1
    Certificate[1]:
    Owner: CN=Unknown, OU=SomeOU, O="Some Company, Inc.", L=SomeCity, ST=GA, C=US
    Issuer: CN=Unknown, OU=SomeOU, O=Some Company, Inc.", L=SomeCity, ST=GA, C=US
    Serial number: 5011a47b
    Valid from: Thu Jul 26 16:11:39 EDT 2012 until: Wed Oct 24 16:11:39 EDT 2012

This error is because your server doesn't have a valid SSL certificate. Hence we need to tell the client to use a different TrustManager. Here is a sample code:

SSLContext ctx = SSLContext.getInstance("TLS");
X509TrustManager tm = new X509TrustManager() {

    public void checkClientTrusted(X509Certificate[] xcs, String string) throws CertificateException {
    }

    public void checkServerTrusted(X509Certificate[] xcs, String string) throws CertificateException {
    }

    public X509Certificate[] getAcceptedIssuers() {
        return null;
    }
};
ctx.init(null, new TrustManager[]{tm}, null);
SSLSocketFactory ssf = new SSLSocketFactory(ctx,SSLSocketFactory.ALLOW_ALL_HOSTNAME_VERIFIER);
ClientConnectionManager ccm = base.getConnectionManager();
SchemeRegistry sr = ccm.getSchemeRegistry();
sr.register(new Scheme("https", 443, ssf));

client = new DefaultHttpClient(ccm, base.getParams());

This exception will come in case your server is based on JDK 7 and your client is on JDK 6 and using SSL certificates. In JDK 7 sslv2hello message handshaking is disabled by default while in JDK 6 sslv2hello message handshaking is enabled. For this reason when your client trying to connect server then a sslv2hello message will be sent towards server and due to sslv2hello message disable you will get this exception. To solve this either you have to move your client to JDK 7 or you have to use 6u91 version of JDK. But to get this version of JDK you have to get the MOS (My Oracle Support) Enterprise support. This patch is not public.

You can get this if the client specifies "https" but the server is only running "http". So, the server isn't expecting to make a secure connection.

This can also happen if you are attempting to connect over HTTPS and the server is not configured to handle SSL connections correctly.

I would check your application servers SSL settings and make sure that the certification is configured correctly.

In my case I was using a JDK 8 client and the server was using insecure old ciphers. The server is Apache and I added this line to the Apache config:

SSLCipherSuite ALL:!ADH:RC4+RSA:+HIGH:!MEDIUM:!LOW:!SSLv2:!EXPORT

You should use a tool like this to verify your SSL configuration is currently secure: https://www.ssllabs.com/ssltest/analyze.html

In my case, the server was running on Docker (using base image adoptopenjdk/openjdk11:alpine) and the issue was a TLS protocol level error (thanks to the following page for providing the explanation: https://jfrog.com/knowledge-base/how-to-resolve-the-javax-net-ssl-sslpeerunverifiedexception-peer-not-authenticated-error-when-using-java-11/).

The solution was eventually to run the client using the following java flag:

-Djdk.tls.client.protocols=TLSv1.2

if you are in dev mode with not valid certificate, why not just set weClient.setUseInsecureSSL(true). works for me