“PKIX路径构建失败”和“无法找到请求目标的有效认证路径”

我试图使用twitter4j库为我的java项目获得推文，它在封面下使用java.net.HttpURLConnection(可以在堆栈跟踪中看到)。在我第一次运行时，我得到了一个关于证书sun.security.validator.ValidatorException和sun.security.provider.certpath.SunCertPathBuilderException的错误。然后我添加了twitter证书:

C:\Program Files\Java\jdk1.7.0_45\jre\lib\security>keytool -importcert -trustcacerts -file PathToCert -alias ca_alias -keystore "C:\Program Files\Java\jdk1.7.0_45\jre\lib\security\cacerts"

但是没有成功。以下是获取推文的流程:

public static void main(String[] args) throws TwitterException {
    ConfigurationBuilder cb = new ConfigurationBuilder();
    cb.setDebugEnabled(true)
        .setOAuthConsumerKey("myConsumerKey")
        .setOAuthConsumerSecret("myConsumerSecret")
        .setOAuthAccessToken("myAccessToken")
        .setOAuthAccessTokenSecret("myAccessTokenSecret");
    
    TwitterFactory tf = new TwitterFactory(cb.build());
    Twitter twitter = tf.getInstance();
    
    try {
        Query query = new Query("iphone");
        QueryResult result;
        result = twitter.search(query);
        System.out.println("Total amount of tweets: " + result.getTweets().size());
        List<Status> tweets = result.getTweets();
        
        for (Status tweet : tweets) {
            System.out.println("@" + tweet.getUser().getScreenName() + " : " + tweet.getText());
        }
    } catch (TwitterException te) {
        te.printStackTrace();
        System.out.println("Failed to search tweets: " + te.getMessage());
    }

这里是错误:

sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
Relevant discussions can be found on the Internet at:
    http://www.google.co.jp/search?q=d35baff5 or
    http://www.google.co.jp/search?q=1446302e
TwitterException{exceptionCode=[d35baff5-1446302e 43208640-747fd158 43208640-747fd158 43208640-747fd158], statusCode=-1, message=null, code=-1, retryAfter=-1, rateLimitStatus=null, version=3.0.5}
    at twitter4j.internal.http.HttpClientImpl.request(HttpClientImpl.java:177)
    at twitter4j.internal.http.HttpClientWrapper.request(HttpClientWrapper.java:61)
    at twitter4j.internal.http.HttpClientWrapper.get(HttpClientWrapper.java:81)
    at twitter4j.TwitterImpl.get(TwitterImpl.java:1929)
    at twitter4j.TwitterImpl.search(TwitterImpl.java:306)
    at jku.cc.servlets.TweetsAnalyzer.main(TweetsAnalyzer.java:38)
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 sun.security.ssl.Alerts.getSSLException(Unknown Source)
    at sun.security.ssl.SSLSocketImpl.fatal(Unknown Source)
    at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
    at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
    at sun.security.ssl.ClientHandshaker.serverCertificate(Unknown Source)
    at sun.security.ssl.ClientHandshaker.processMessage(Unknown Source)
    at sun.security.ssl.Handshaker.processLoop(Unknown Source)
    at sun.security.ssl.Handshaker.process_record(Unknown Source)
    at sun.security.ssl.SSLSocketImpl.readRecord(Unknown Source)
    at sun.security.ssl.SSLSocketImpl.performInitialHandshake(Unknown Source)
    at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
    at sun.security.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 java.net.HttpURLConnection.getResponseCode(Unknown Source)
    at sun.net.www.protocol.https.HttpsURLConnectionImpl.getResponseCode(Unknown Source)
    at twitter4j.internal.http.HttpResponseImpl.<init>(HttpResponseImpl.java:34)
    at twitter4j.internal.http.HttpClientImpl.request(HttpClientImpl.java:141)
    ... 5 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 sun.security.ssl.X509TrustManagerImpl.validate(Unknown Source)
    at sun.security.ssl.X509TrustManagerImpl.checkTrusted(Unknown Source)
    at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(Unknown Source)
    ... 20 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)
    ... 26 more
Failed to search tweets: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target

当前回答

我留下一些小费。

使用- dsll .debug=true检查SSL。检查您是否正在创建隧道或试图忽略它

SSLContext sslContext = new SSLContextBuilder().loadTrustMaterial(null, (x509CertChain, authType) -> true).build();
            httpClient = HttpClientBuilder.create()
                    .setSSLContext(sslContext)
                    .setConnectionManager(new PoolingHttpClientConnectionManager(RegistryBuilder.<ConnectionSocketFactory>create()
                            .register("http", PlainConnectionSocketFactory.INSTANCE)
                            .register("https", new SSLConnectionSocketFactory(sslContext, NoopHostnameVerifier.INSTANCE))
                            .build()
                    )).build();

httpClient.execute(requisicao)

2021-07-28 16:59:50

其他回答

我用下面的方法修正了这个问题

复制有连接问题的url 进入Android Studio->Settings->Http Settings 在“Test Connection”中，粘贴该url并按ok 点击确定，Android Studio会要求导入证书 Url，导入就是这样。没别的事可做，我的问题就没了。不需要重新启动工作室。

2018-07-23 10:51:23

经过半天的努力，又找到了一个解决问题的方法。我能够在MAC 10.15.5 (Catalina)中解决这个问题。遵循以下步骤。

This problem occurs when we are running behind a company proxy , In my case its Zscaler. Open Key chain access, export CA certificate.(Select CA certificate, File->export items and save with the desired name) Copy the path of existing cacerts from java folder(/Library/Java/JavaVirtualMachines/jdk1.8.0_251.jdk/Contents/Home/jre/lib/security/cacerts ) Open terminal and navigate to the Keytool folder (/Library/Java/JavaVirtualMachines/jdk1.8.0_251.jdk/Contents/Home/jre/bin ) Run the below command. Keytool -importcert - file (Path to exported cert from the keychainaccess) -alias (give a name) -keystore (Path of existing cacerts from java folder) sudo Keytool -importcert -file /Users/Desktop/RootCA.cer -alias demo -keystore /Library/Java/JavaVirtualMachines/jdk1.8.0_251.jdk/Contents/Home/jre/lib/security/cacerts It will ask for password , give it as : changeit It asks for confirmation , Say : yes

完成所有这些步骤后，退出eclipse并启动新的会话。

2020-07-24 13:05:33

Mac

接受的答案不适用于Mac，因为Mac (Chrome或Firefox)中没有导出按钮。请检查此答案以下载证书，并按照以下步骤执行:

列出keystore中安装的所有证书:

cd $JAVA_HOME/lib/security
keytool -list -keystore cacerts

注:

密钥库的默认密码为:changeit。对于Java-8或以下版本，请使用cd $JAVA_HOME/jre/lib/security命令

在将证书导入密钥存储库之前，请备份密钥存储库:

sudo cp cacerts cacerts.bak

将下载的证书导入keystore:

sudo keytool -importcert -alias youralias -file /path/to/the/downloaded/certificate -keystore cacerts

检查证书是否存储在密钥存储库中:

sudo keytool -list -keystore cacerts -alias youralias

如果你想看到更详细的信息，添加-v标志:

sudo keytool -v -list -keystore cacerts -alias youralias

2021-03-31 14:39:13

我在尝试通过Eclipse的更新站点在Eclipse中安装Cucumber-Eclipse插件时遇到了这个问题。我收到了同样的SunCertPathBuilderException错误:

Unable to read repository at http://cucumber.io/cucumber-eclipse/update-site/content.xml.
    Unable to read repository at http://cucumber.io/cucumber-eclipse/update-site/content.xml.
    sun.security.validator.ValidatorException: PKIX path building failed: 
   sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target

虽然其他一些答案在这个问题的特定情况下是合适和有用的，但它们对我的问题没有帮助和误导。

在我的情况下，问题是他们的更新站点提供的URL是:

https://cucumber.io/cucumber-eclipse/update-site

然而，当通过浏览器导航到它时，它重定向到(注意添加的“。github”):

http://cucumber.github.io/cucumber-eclipse/update-site/

因此，解决方案是在eclipse中添加更新站点时，只需使用更新站点URL的重定向版本。

2017-05-01 21:07:16

如果你使用的是ubuntu/linux系统，在终端运行下面的命令。

cd /usr/local/share/ca-certificates

Cp /文件位置/----。crt。(拷贝CRT文件到/usr/local/share/ca-certificates)

sudo update-ca-certificates

2022-09-22 14:50:18