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

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

其他回答

仅适用于Windows，请遵循以下步骤:

In Chrome go to settings. In Settings click show advance settings. Under HTTPS/SSL Click on Manage Certificates. Export Your Certificate. In Windows searchs (Pressing windows key on keyboard) type java. Select (Configure Java) Option Which will open Java Control Panel Select Security tab in Java Control Panel Select Manage Certificates Click Import Under (User) tab selected and certificate type as (Trusted Certificates) Click import button and browse to downloaded certificate and import it.

2016-11-18 11:07:18

你有两个选择，将自签名证书导入到java的keystore中，用于软件运行的每个jvm，或者尝试不验证ssl工厂:

jdbc:postgresql://myserver.com:5432/mydatabasename?ssl=true&sslfactory=org.postgresql.ssl.NonValidatingFactory

2016-04-21 03:45:09

Download the certificate from Nexus3 Browser (click on the lock-pad for View Site Information in case of Edge broser)
Click on Connection is secure
Click on the certificate details
Click on Copy To file (it opens up export certificate wizard)
Choose Base-64 encoding
Browse and select a download location and file-name (let’s say mycert)
Open cmd
Goto the download location and execute the below command
keytool -import -alias mycert -keystore  "<<your-JAVA_HOME-directory>>\jre\lib\security\cacerts" -file mycert.cer
Restart the machine
Execute maven build again.

2021-12-10 16:18:45

我有同样的问题与证书错误，这是因为SNI:我使用的http客户端没有SNI实现。所以版本更新起了作用

   <dependency>
        <groupId>org.apache.httpcomponents</groupId>
        <artifactId>httpclient</artifactId>
        <version>4.3.6</version>
    </dependency>

2015-10-26 06:55:06

@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

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

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