sun.security.provider.certpath.SunCertPathBuilderException:无法找到请求目标的有效认证路径

我有一个类，将从https服务器下载文件。当我运行它时，它返回了很多错误。我的证书好像有问题。是否可以忽略客户机-服务器身份验证?如果有，怎么做?

package com.da;

import java.io.FileOutputStream;
import java.io.IOException;
import java.nio.CharBuffer;
import java.util.concurrent.Future;

import org.apache.http.HttpResponse;
import org.apache.http.client.utils.URIUtils;
import org.apache.http.impl.nio.client.DefaultHttpAsyncClient;
import org.apache.http.nio.IOControl;
import org.apache.http.nio.client.HttpAsyncClient;
import org.apache.http.nio.client.methods.AsyncCharConsumer;
import org.apache.http.nio.client.methods.HttpAsyncGet;
import org.apache.http.nio.client.methods.HttpAsyncPost;

public class RSDDownloadFile {
    static FileOutputStream fos;

    public void DownloadFile(String URI, String Request) throws Exception
    {
        java.net.URI uri = URIUtils.createURI("https", "176.66.3.69:6443", -1, "download.aspx",
                "Lang=EN&AuthToken=package", null);
        System.out.println("URI Query: " + uri.toString());

        HttpAsyncClient httpclient = new DefaultHttpAsyncClient();
        httpclient.start();
        try {
            Future<Boolean> future = httpclient.execute(
                    new HttpAsyncGet(uri),
                    new ResponseCallback(), null);

            Boolean result = future.get();
            if (result != null && result.booleanValue()) {
                System.out.println("\nRequest successfully executed");
            } else {
                System.out.println("Request failed");
            }              
        } 
        catch(Exception e){
            System.out.println("[DownloadFile] Exception: " + e.getMessage());
        }
        finally {
            System.out.println("Shutting down");
            httpclient.shutdown();
        }
        System.out.println("Done");  

    }

    static class ResponseCallback extends AsyncCharConsumer<Boolean> {

        @Override
        protected void onResponseReceived(final HttpResponse response) {
             System.out.println("Response: " + response.getStatusLine());
             System.out.println("Header: " + response.toString());
             try {   
                 //if(response.getStatusLine().getStatusCode()==200)
                     fos = new FileOutputStream( "Response.html" );
             }catch(Exception e){
                 System.out.println("[onResponseReceived] Exception: " + e.getMessage());
             }
        }

        @Override
        protected void onCharReceived(final CharBuffer buf, final IOControl ioctrl) throws IOException {
            try
            {
                while (buf.hasRemaining()) 
                {
                    //System.out.print(buf.get());
                    fos.write(buf.get());
                }
            }catch(Exception e)
            {
                System.out.println("[onCharReceived] Exception: " + e.getMessage());
            }
        }

        @Override
        protected void onCleanup() {
            try
            {             
                if(fos!=null)
                    fos.close();
            }catch(Exception e){
                System.out.println("[onCleanup] Exception: " + e.getMessage());         
            }
             System.out.println("onCleanup()");
        }

        @Override
        protected Boolean buildResult() {
            return Boolean.TRUE;
        }

    }
}

错误:

URI Query: https://176.66.3.69:6443/download.aspx?Lang=EN&AuthToken=package
Aug 2, 2011 3:47:57 PM org.apache.http.impl.nio.client.NHttpClientProtocolHandler exception
SEVERE: I/O error: General SSLEngine problem
javax.net.ssl.SSLHandshakeException: General SSLEngine problem
    at com.sun.net.ssl.internal.ssl.Handshaker.checkThrown(Unknown Source)
    at com.sun.net.ssl.internal.ssl.SSLEngineImpl.checkTaskThrown(Unknown Source)
    at com.sun.net.ssl.internal.ssl.SSLEngineImpl.writeAppRecord(Unknown Source)
    at com.sun.net.ssl.internal.ssl.SSLEngineImpl.wrap(Unknown Source)
    at javax.net.ssl.SSLEngine.wrap(Unknown Source)
    at org.apache.http.impl.nio.reactor.SSLIOSession.doHandshake(SSLIOSession.java:154)
    at org.apache.http.impl.nio.reactor.SSLIOSession.isAppInputReady(SSLIOSession.java:276)
    at org.apache.http.impl.nio.client.InternalClientEventDispatch.inputReady(InternalClientEventDispatch.java:79)
    at org.apache.http.impl.nio.reactor.BaseIOReactor.readable(BaseIOReactor.java:161)
    at org.apache.http.impl.nio.reactor.AbstractIOReactor.processEvent(AbstractIOReactor.java:335)
    at org.apache.http.impl.nio.reactor.AbstractIOReactor.processEvents(AbstractIOReactor.java:315)
    at org.apache.http.impl.nio.reactor.AbstractIOReactor.execute(AbstractIOReactor.java:275)
    at org.apache.http.impl.nio.reactor.BaseIOReactor.execute(BaseIOReactor.java:104)
    at org.apache.http.impl.nio.reactor.AbstractMultiworkerIOReactor$Worker.run(AbstractMultiworkerIOReactor.java:542)
    at java.lang.Thread.run(Unknown Source)
Caused by: javax.net.ssl.SSLHandshakeException: General SSLEngine problem
    at com.sun.net.ssl.internal.ssl.Alerts.getSSLException(Unknown Source)
    at com.sun.net.ssl.internal.ssl.SSLEngineImpl.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$1.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at com.sun.net.ssl.internal.ssl.Handshaker$DelegatedTask.run(Unknown Source)
    at org.apache.http.impl.nio.reactor.SSLIOSession.doHandshake(SSLIOSession.java:180)
    ... 9 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.checkServerTrusted(Unknown Source)
    at com.sun.net.ssl.internal.ssl.JsseX509TrustManager.checkServerTrusted(Unknown Source)
    ... 16 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)
    ... 21 more
onCleanup()

[DownloadFile] Exception: javax.net.ssl.SSLHandshakeException: General SSLEngine problem
Shutting down
Done

当前回答

@Gabe martin - dempasy的回答对我很有帮助。我写了一个相关的小脚本。使用方法非常简单。

从主机安装证书:

> sudo ./java-cert-importer.sh example.com

删除已经安装的证书。

> sudo ./java-cert-importer.sh example.com --delete

java-cert-importer.sh

#!/usr/bin/env bash

# Exit on error
set -e

# Ensure script is running as root
if [ "$EUID" -ne 0 ]
  then echo "WARN: Please run as root (sudo)"
  exit 1
fi

# Check required commands
command -v openssl >/dev/null 2>&1 || { echo "Required command 'openssl' not installed. Aborting." >&2; exit 1; }
command -v keytool >/dev/null 2>&1 || { echo "Required command 'keytool' not installed. Aborting." >&2; exit 1; }

# Get command line args
host=$1; port=${2:-443}; deleteCmd=${3:-${2}}

# Check host argument
if [ ! ${host} ]; then
cat << EOF
Please enter required parameter(s)

usage:  ./java-cert-importer.sh <host> [ <port> | default=443 ] [ -d | --delete ]

EOF
exit 1
fi;

if [ "$JAVA_HOME" ]; then
    javahome=${JAVA_HOME}
elif [[ "$OSTYPE" == "linux-gnu" ]]; then # Linux
    javahome=$(readlink -f $(which java) | sed "s:bin/java::")
elif [[ "$OSTYPE" == "darwin"* ]]; then # Mac OS X
    javahome="$(/usr/libexec/java_home)/jre"
fi

if [ ! "$javahome" ]; then
    echo "WARN: Java home cannot be found."
    exit 1
elif [ ! -d "$javahome" ]; then
    echo "WARN: Detected Java home does not exists: $javahome"
    exit 1
fi

echo "Detected Java Home: $javahome"

# Set cacerts file path
cacertspath=${javahome}/lib/security/cacerts
cacertsbackup="${cacertspath}.$$.backup"

if ( [ "$deleteCmd" == "-d" ] || [ "$deleteCmd" == "--delete" ] ); then
    sudo keytool -delete -alias ${host} -keystore ${cacertspath} -storepass changeit
    echo "Certificate is deleted for ${host}"
    exit 0
fi

# Get host info from user
#read -p "Enter server host (E.g. example.com) : " host
#read -p "Enter server port (Default 443) : " port

# create temp file
tmpfile="/tmp/${host}.$$.crt"

# Create java cacerts backup file
cp ${cacertspath} ${cacertsbackup}

echo "Java CaCerts Backup: ${cacertsbackup}"

# Get certificate from speficied host
openssl x509 -in <(openssl s_client -connect ${host}:${port} -prexit 2>/dev/null) -out ${tmpfile}

# Import certificate into java cacerts file
sudo keytool -importcert -file ${tmpfile} -alias ${host} -keystore ${cacertspath} -storepass changeit

# Remove temp certificate file
rm ${tmpfile}

# Check certificate alias name (same with host) that imported successfully
result=$(keytool -list -v -keystore ${cacertspath} -storepass changeit | grep "Alias name: ${host}")

# Show results to user
if [ "$result" ]; then
    echo "Success: Certificate is imported to java cacerts for ${host}";
else
    echo "Error: Something went wrong";
fi;

2015-06-30 08:25:02

其他回答

引用自不再“无法找到请求目标的有效认证路径”

when trying to open an SSL connection to a host using JSSE. What this usually means is that the server is using a test certificate (possibly generated using keytool) rather than a certificate from a well known commercial Certification Authority such as Verisign or GoDaddy. Web browsers display warning dialogs in this case, but since JSSE cannot assume an interactive user is present it just throws an exception by default. Certificate validation is a very important part of SSL security, but I am not writing this entry to explain the details. If you are interested, you can start by reading the Wikipedia blurb. I am writing this entry to show a simple way to talk to that host with the test certificate, if you really want to. Basically, you want to add the server's certificate to the KeyStore with your trusted certificates

尝试这里提供的代码。这可能会有帮助。

2011-08-02 08:09:04

当您的服务器拥有自签名证书时，就会出现问题。要解决这个问题，可以将该证书添加到JVM的受信任证书列表中。

在本文中，作者描述了如何从浏览器获取证书并将其添加到JVM的cacerts文件中。您可以编辑JAVA_HOME/jre/lib/security/cacerts文件，也可以使用-Djavax.net.ssl.trustStore参数运行应用程序。验证您使用的JDK/JRE，因为这通常是混淆的来源。

请参见:SSL证书服务器名称如何解析/我可以使用keytool添加替代名称吗?如果遇到java.security.cert.CertificateException: No name matching localhost found异常。

2012-08-27 17:42:46

这是我在macOS上使用的方法。将server-name和server-port替换为您自己的。

在终端上运行这两个命令。

从远程服务器下载证书

openssl x509 -in <(openssl s_client -connect server-name:server-port -prexit 2>/dev/null) -out ~/server-name.crt

将证书导入Java密钥存储库

sudo keytool -importcert -file ~/server-name.crt -alias server-name -keystore $JAVA_HOME/jre/lib/security/cacerts -storepass changeit

重新启动应用程序，certs错误就会消失!

2022-04-05 19:26:29

在我的例子中，我的密钥存储库和信任存储库都具有相同的证书，因此删除信任存储库有帮助。有时，如果您有多个证书副本，则证书链可能会成为问题。

2019-05-16 15:16:27

在我的例子中，我用Java 1.6运行MacOs High Sierra。cacert文件的位置与Gabe martin - dempasy回答中提到的位置不同。cacert文件也已经链接到另一个位置(/Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home/lib/security/cacerts)。

使用FireFox，我将证书从该网站导出到一个名为“exportedCertFile.crt”的本地文件。从那里，我使用keytool将证书移动到cacert文件中。这就解决了问题。

bash-3.2# cd /Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home/lib/security/
bash-3.2# keytool -importcert -file ~/exportedCertFile.crt -alias example -keystore cacerts -storepass changeit

2018-07-17 20:26:34

sun.security.provider.certpath.SunCertPathBuilderException:无法找到请求目标的有效认证路径

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