问题
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?
回答1:
If you want to ignore the certificate all together then take a look at the answer here: 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. Java SSL connect, add server cert to keystore programmatically
The key is:
KeyStore.Entry newEntry = new KeyStore.TrustedCertificateEntry(someCert);
ks.setEntry("someAlias", newEntry, null);
回答2:
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);
}
}
}
回答3:
Set validateTLSCertificates property to false for your JSoup command.
Jsoup.connect("https://google.com/").validateTLSCertificates(false).get();
回答4:
FWIW, on Ubuntu 10.04.2 LTS installing the ca-certificates-java and the ca-certificates packages fixed this problem for me.
回答5:
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);
}
}
回答6:
If you're using CloudFoundry then you'd have to explicitly push the jar along with the keystore having the certificate.
回答7:
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.
来源：https://stackoverflow.com/questions/13626965/how-to-ignore-pkix-path-building-failed-sun-security-provider-certpath-suncertp