How to ignore PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException?

Java Problem Overview

I got the following exception when try to post a request to a http server:

Here is the code I used

URL url = new URL(
		"https://www.abc.com");
HttpURLConnection conn = (HttpURLConnection) url.openConnection();

conn.setRequestMethod("GET");

conn.setDoOutput(true);

DataOutputStream wr = new DataOutputStream(conn.getOutputStream());
// wr.writeBytes(params);
wr.flush();
wr.close();

BufferedReader br = new BufferedReader(new InputStreamReader(
		conn.getInputStream()));
String line = null;
while ((line = br.readLine()) != null) {
	System.out.println(line);
}

Here is the exception:

Exception in thread "main" javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
	at com.sun.net.ssl.internal.ssl.Alerts.getSSLException(Alerts.java:174)
	at com.sun.net.ssl.internal.ssl.SSLSocketImpl.fatal(SSLSocketImpl.java:1731)
	at com.sun.net.ssl.internal.ssl.Handshaker.fatalSE(Handshaker.java:241)
	at com.sun.net.ssl.internal.ssl.Handshaker.fatalSE(Handshaker.java:235)
	at com.sun.net.ssl.internal.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1206)
	at com.sun.net.ssl.internal.ssl.ClientHandshaker.processMessage(ClientHandshaker.java:136)
	at com.sun.net.ssl.internal.ssl.Handshaker.processLoop(Handshaker.java:593)
	at com.sun.net.ssl.internal.ssl.Handshaker.process_record(Handshaker.java:529)
	at com.sun.net.ssl.internal.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:925)
	at com.sun.net.ssl.internal.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1170)
	at com.sun.net.ssl.internal.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1197)
	at com.sun.net.ssl.internal.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1181)
	at sun.net.www.protocol.https.HttpsClient.afterConnect(HttpsClient.java:434)
	at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(AbstractDelegateHttpsURLConnection.java:166)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1014)
	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getOutputStream(HttpsURLConnectionImpl.java:230)
	at com.amazon.mzang.tools.httpchecker.CategoryYank.getPV(CategoryYank.java:32)
	at com.amazon.mzang.tools.httpchecker.CategoryYank.main(CategoryYank.java:18)
Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
	at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:323)
	at sun.security.validator.PKIXValidator.engineValidate(PKIXValidator.java:217)
	at sun.security.validator.Validator.validate(Validator.java:218)
	at com.sun.net.ssl.internal.ssl.X509TrustManagerImpl.validate(X509TrustManagerImpl.java:126)
	at com.sun.net.ssl.internal.ssl.X509TrustManagerImpl.checkServerTrusted(X509TrustManagerImpl.java:209)
	at com.sun.net.ssl.internal.ssl.X509TrustManagerImpl.checkServerTrusted(X509TrustManagerImpl.java:249)
	at com.sun.net.ssl.internal.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1185)
	... 13 more
Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
	at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(SunCertPathBuilder.java:174)
	at java.security.cert.CertPathBuilder.build(CertPathBuilder.java:238)
	at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:318)
	... 19 more

The server is not owned by me. Is there a way to ignore this exception?

Java Solutions

Solution 1 - Java

If you want to ignore the certificate all together then take a look at the answer here: https://stackoverflow.com/questions/6047996/ignore-self-signed-ssl-cert-using-jersey-client

Although this will make your app vulnerable to man-in-the-middle attacks.

Or, try adding the cert to your java store as a trusted cert. This site may be helpful. http://blog.icodejava.com/tag/get-public-key-of-ssl-certificate-in-java/

Here's another thread showing how to add a cert to your store. https://stackoverflow.com/questions/6755180/java-ssl-connect-add-server-cert-to-keystore-programatically

The key is:

KeyStore.Entry newEntry = new KeyStore.TrustedCertificateEntry(someCert);
ks.setEntry("someAlias", newEntry, null);

Solution 2 - Java

I have used the below code to override the SSL checking in my project and it worked for me.

package com.beingjavaguys.testftp;

import java.io.InputStreamReader;
import java.io.Reader;
import java.net.URL;
import java.net.URLConnection;

import javax.net.ssl.HostnameVerifier;
import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSession;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;
import java.security.cert.X509Certificate;

/**
 * Fix for Exception in thread "main" javax.net.ssl.SSLHandshakeException:
 * sun.security.validator.ValidatorException: PKIX path building failed:
 * sun.security.provider.certpath.SunCertPathBuilderException: unable to find
 * valid certification path to requested target
 */
public class ConnectToHttpsUrl {
	public static void main(String[] args) throws Exception {
		/* Start of Fix */
		TrustManager[] trustAllCerts = new TrustManager[] { new X509TrustManager() {
			public java.security.cert.X509Certificate[] getAcceptedIssuers() { return null; }
			public void checkClientTrusted(X509Certificate[] certs, String authType) { }
			public void checkServerTrusted(X509Certificate[] certs, String authType) { }

		} };

		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() {
			public boolean verify(String hostname, SSLSession session) { return true; }
		};
		// Install the all-trusting host verifier
		HttpsURLConnection.setDefaultHostnameVerifier(allHostsValid);
		/* End of the fix*/

		URL url = new URL("https://nameofthesecuredurl.com");
		URLConnection con = url.openConnection();
		Reader reader = new InputStreamReader(con.getInputStream());
		while (true) {
			int ch = reader.read();
			if (ch == -1) 
				break;
			System.out.print((char) ch);
		}
	}
}

Solution 3 - Java

Set validateTLSCertificates property to false for your JSoup command.

Jsoup.connect("https://google.com/").validateTLSCertificates(false).get();

Solution 4 - Java

FWIW, on Ubuntu 10.04.2 LTS installing the ca-certificates-java and the ca-certificates packages fixed this problem for me.

Solution 5 - Java

I got the same error while executing the below spring-boot + RestAssured simple test.

import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

import static com.jayway.restassured.RestAssured.when;
import static org.apache.http.HttpStatus.SC_OK;

@RunWith(SpringJUnit4ClassRunner.class)
public class GeneratorTest {

@Test
public void generatorEndPoint() {
    when().get("https://bal-bla-bla-bla.com/generators")
            .then().statusCode(SC_OK);
    }
}

The simple fix in my case is to add 'useRelaxedHTTPSValidations()'

RestAssured.useRelaxedHTTPSValidation();

Then the test looks like

import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

import static com.jayway.restassured.RestAssured.when;
import static org.apache.http.HttpStatus.SC_OK;

@RunWith(SpringJUnit4ClassRunner.class)
public class GeneratorTest {

@Before
public void setUp() {
   RestAssured.useRelaxedHTTPSValidation();
}


@Test
public void generatorEndPoint() {
    when().get("https://bal-bla-bla-bla.com/generators")
            .then().statusCode(SC_OK);
    }
}

Solution 6 - Java

If the issue is a missing intermediate certificate, you can enable Oracle JRE to automatically download the missing intermediate certificate as explained in this answer.

Just set the Java system property -Dcom.sun.security.enableAIAcaIssuers=true

For this to work the server's certificate must provide the URI to the intermediate certificate (the certificate's issuer). As far as I can tell, this is what browsers do as well and should be just as secure - I'm not a security expert though.

Edit: If I recall correctly, this seems to work at least with Java 8 and is documented here for Java 9.

Solution 7 - Java

If you're using CloudFoundry then you'd have to explicitly push the jar along with the keystore having the certificate.

Solution 8 - Java

I also came across the same issue. I was trying to build the project with a clean install goal. I simply changed it to clean package -o in the run configuration. Then I re-built the project and it worked for me.

Solution 9 - Java

I also faced this issue. I was having JDK 1.8.0_121. I upgraded JDK to 1.8.0_181 and it worked like a charm.

Solution 10 - Java

I also have the same problem on Apache Tomcat/7.0.67 and Java JVM Version: 1.8.0_66-b18. Just upgrading to JRE 1.8.0_241 it seems the issue was solved.

Content Type	Original Author	Original Content on Stackoverflow
Question	DeepNightTwo	View Question on Stackoverflow
Solution 1 - Java	km1	View Answer on Stackoverflow
Solution 2 - Java	Kishore Kumar	View Answer on Stackoverflow
Solution 3 - Java	Zahid Hasan	View Answer on Stackoverflow
Solution 4 - Java	slim	View Answer on Stackoverflow
Solution 5 - Java	Praveen	View Answer on Stackoverflow
Solution 6 - Java	Ben Romberg	View Answer on Stackoverflow
Solution 7 - Java	Smart Coder	View Answer on Stackoverflow
Solution 8 - Java	Chetan Patil	View Answer on Stackoverflow
Solution 9 - Java	Osanda Deshan	View Answer on Stackoverflow
Solution 10 - Java	espajava	View Answer on Stackoverflow