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解决PKIX path building failed的问题

2018-02-05 17:21 531 查看
在一次调试中，出现了这个错误：

Java代码

[ERROR] http-8080-Processor25 2010-01-20 15:29:28,640 org.jasig.cas.client.validation.Cas20ServiceTicketValidator     - 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  
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.startHandshake(Unknown Source)  
    at com.sun.net.ssl.internal.ssl.SSLSocketImpl.startHandshake(Unknown Source)  
    at sun.net.www.protocol.https.HttpsClient.afterConnect(Unknown Source)  
    at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown Source)  
    at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)  
    at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(Unknown Source)  
    at org.jasig.ca
4000
s.client.validation.AbstractCasProtocolUrlBasedTicketValidator.retrieveResponseFromServer(AbstractCasProtocolUrlBasedTicketValidator.java:58)  
    at org.jasig.cas.client.validation.AbstractUrlBasedTicketValidator.validate(AbstractUrlBasedTicketValidator.java:167)  
    at org.jasig.cas.client.validation.AbstractTicketValidationFilter.doFilter(AbstractTicketValidationFilter.java:141)  
    at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:137)  
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)  
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)  
    at org.jasig.cas.client.authentication.AuthenticationFilter.doFilter(AuthenticationFilter.java:149)  
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)  
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)  
    at org.jasig.cas.client.session.SingleSignOutFilter.doFilter(SingleSignOutFilter.java:78)  
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)  
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)  
    at com.web114.web.filter.UTF8EncoderFilter.doFilter(UTF8EncoderFilter.java:57)  
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)  
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)  
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)  
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:174)  
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)  
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)  
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)  
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:174)  
    at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:874)  
    at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:665)  
    at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528)  
    at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81)  
    at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689)  
    at java.lang.Thread.run(Unknown Source) 

这个错误最终定位在这个方法：

Java代码

protected final String retrieveResponseFromServer(final URL validationUrl,  
            final String ticket) {  
        HttpURLConnection connection = null;  
        try {  
            connection = (HttpURLConnection) validationUrl.openConnection();  
            final BufferedReader in = new BufferedReader(new InputStreamReader(  
                    connection.getInputStream()));  
  
            String line;  
            final StringBuffer stringBuffer = new StringBuffer(255);  
  
            synchronized (stringBuffer) {  
                while ((line = in.readLine()) != null) {  
                    stringBuffer.append(line);  
                    stringBuffer.append("\n");  
                }  
                return stringBuffer.toString();  
            }  
  
        } catch (final IOException e) {  
            log.error(e, e);  
            return null;  
        } catch (final Exception e1){  
            log.error(e1, e1);  
            return null;  
        }finally {  
            if (connection != null) {  
                connection.disconnect();  
            }  
        }  
    } 

后来上网查了很久，说是证书出问题了，服务器不信任我们自己创建的证书，所以在代码中必须要忽略证书信任问题。只要在创建connection之前调用两个方法：

Java代码

trustAllHttpsCertificates();  
HttpsURLConnection.setDefaultHostnameVerifier(hv); 

具体的实现是：

Java代码
HostnameVerifier hv = new HostnameVerifier() {  
        public boolean verify(String urlHostName, SSLSession session) {  
            System.out.println("Warning: URL Host: " + urlHostName + " vs. "  
                               + session.getPeerHost());  
            return true;  
        }  
    };  
      
    private static void trustAllHttpsCertificates() throws Exception {  
        javax.net.ssl.TrustManager[] trustAllCerts = new javax.net.ssl.TrustManager[1];  
        javax.net.ssl.TrustManager tm = new miTM();  
        trustAllCerts[0] = tm;  
        javax.net.ssl.SSLContext sc = javax.net.ssl.SSLContext  
                .getInstance("SSL");  
        sc.init(null, trustAllCerts, null);  
        javax.net.ssl.HttpsURLConnection.setDefaultSSLSocketFactory(sc  
                .getSocketFactory());  
    }  
  
    static class miTM implements javax.net.ssl.TrustManager,  
            javax.net.ssl.X509TrustManager {  
        public java.security.cert.X509Certificate[] getAcceptedIssuers() {  
            return null;  
        }  
  
        public boolean isServerTrusted(  
                java.security.cert.X509Certificate[] certs) {  
            return true;  
        }  
  
        public boolean isClientTrusted(  
                java.security.cert.X509Certificate[] certs) {  
            return true;  
        }  
  
        public void checkServerTrusted(  
                java.security.cert.X509Certificate[] certs, String authType)  
                throws java.security.cert.CertificateException {  
            return;  
        }  
  
        public void checkClientTrusted(  
                java.security.cert.X509Certificate[] certs, String authType)  
                throws java.security.cert.CertificateException {  
            return;  
        }  
    } 

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