Could not find a valid certification path for the requested target.

Question

Possible duplicate:
Failed to create PKIX path: could not find a valid certification path for the requested target

I have a problem. Already struggling with him for a long time. Here is my code:

package com.XYZ.spr.server; import org.apache.commons.mail.Email; import org.apache.commons.mail.SimpleEmail; public class GeneratorMaili { public static final String HOSTNAME = "smtp.XYZ.com"; public static final String ADDRESS_FROM = " [e-mail] "; public static final String TOPIC= "Topic"; public static void wyslijEmail(String reciver) throws Exception { System.setProperty("javax.net.ssl.trustStore", "cacerts"); System.setProperty("javax.net.ssl.trustStorePassword", "changeit"); Email email = new SimpleEmail(); email.setSmtpPort(587); // email.setTLS(true); email.setSSL(true); System.out.println("fdfdf"); email.setAuthentication(" user@.XYZ.pl ", "pass"); email.setDebug(true); email.setHostName(HOSTNAME); email.setFrom(ADDRESS_FROM); email.setSubject(TOPIC); email.setMsg("Test"); email.addTo(reciver); System.out.println(reciver); email.send(); System.out.println("Ok!"); } } 

I have a problem with the certificate. Here are the steps I took:

• I have a download certificate using my browser and I saved it as cert.cer
• I used this command: keytool -import -trustcacerts -keystore cacerts -storepass changeit -noprompt -file cert.cer
• I use GWT, so I copied cacerts to the WEB-INF folder.

Unfortunately, you still get this error:

  DEBUG SMTP: exception reading response: 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 org.apache.commons.mail.EmailException: Sending the email to the following server failed : smtp.XYZ.com:587 at org.apache.commons.mail.Email.sendMimeMessage(Email.java:1242) at org.apache.commons.mail.Email.send(Email.java:1267) at com.XYZ.spr.server.GeneratorMaili.wyslijEmail(GeneratorMaili.java:28) at com.XYZ.spr.server.SprawozdaniaServiceImpl.addSprawozdanie(SprawozdaniaServiceImpl.java:123) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java:569) at com.google.gwt.user.server.rpc.RemoteServiceServlet.processCall(RemoteServiceServlet.java:208) at com.google.gwt.user.server.rpc.RemoteServiceServlet.processPost(RemoteServiceServlet.java:248) at com.google.gwt.user.server.rpc.AbstractRemoteServiceServlet.doPost(AbstractRemoteServiceServlet.java:62) at javax.servlet.http.HttpServlet.service(HttpServlet.java:637) at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:487) at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:362) at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216) at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181) at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:729) at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:405) at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152) at org.mortbay.jetty.handler.RequestLogHandler.handle(RequestLogHandler.java:49) at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152) at org.mortbay.jetty.Server.handle(Server.java:324) at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:505) at org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:843) at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:647) at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:205) at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:380) at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:395) at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:488) Caused by: javax.mail.MessagingException: Exception reading response; nested exception is: 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.mail.smtp.SMTPTransport.readServerResponse(SMTPTransport.java:1611) at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1369) at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:412) at javax.mail.Service.connect(Service.java:310) at javax.mail.Service.connect(Service.java:169) at javax.mail.Service.connect(Service.java:118) at javax.mail.Transport.send0(Transport.java:188) at javax.mail.Transport.send(Transport.java:118) at org.apache.commons.mail.Email.sendMimeMessage(Email.java:1232) ... 30 more Caused by: 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(Unknown Source) at com.sun.net.ssl.internal.ssl.SSLSocketImpl.fatal(Unknown Source) at com.sun.net.ssl.internal.ssl.Handshaker.fatalSE(Unknown Source) at com.sun.net.ssl.internal.ssl.Handshaker.fatalSE(Unknown Source) at com.sun.net.ssl.internal.ssl.ClientHandshaker.serverCertificate(Unknown Source) at com.sun.net.ssl.internal.ssl.ClientHandshaker.processMessage(Unknown Source) at com.sun.net.ssl.internal.ssl.Handshaker.processLoop(Unknown Source) at com.sun.net.ssl.internal.ssl.Handshaker.process_record(Unknown Source) at com.sun.net.ssl.internal.ssl.SSLSocketImpl.readRecord(Unknown Source) at com.sun.net.ssl.internal.ssl.SSLSocketImpl.performInitialHandshake(Unknown Source) at com.sun.net.ssl.internal.ssl.SSLSocketImpl.readDataRecord(Unknown Source) at com.sun.net.ssl.internal.ssl.AppInputStream.read(Unknown Source) at com.sun.mail.util.TraceInputStream.read(TraceInputStream.java:110) at java.io.BufferedInputStream.fill(Unknown Source) at java.io.BufferedInputStream.read(Unknown Source) at com.sun.mail.util.LineInputStream.readLine(LineInputStream.java:88) at com.sun.mail.smtp.SMTPTransport.readServerResponse(SMTPTransport.java:1589) ... 38 more 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(Unknown Source) at sun.security.validator.PKIXValidator.engineValidate(Unknown Source) at sun.security.validator.Validator.validate(Unknown Source) at com.sun.net.ssl.internal.ssl.X509TrustManagerImpl.validate(Unknown Source) at com.sun.net.ssl.internal.ssl.X509TrustManagerImpl.checkServerTrusted(Unknown Source) at com.sun.net.ssl.internal.ssl.X509TrustManagerImpl.checkServerTrusted(Unknown Source) ... 51 more Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(Unknown Source) at java.security.cert.CertPathBuilder.build(Unknown Source) ... 57 more 

Answer 1

I use GWT, so I copied cacerts to the WEB-INF folder.

The Java Trust Console specified using the javax.net.ssl.trustStore property is not loaded using the class loader, and therefore, placing it in the class path does not affect the results. You need to specify the absolute path to the power of attorney in your call to System.setProperty .