古人学问无遗力,少壮工夫老始成。这篇文章主要讲述Firefox 52.4.1上的Java Applet“ClassNotFoundException” - 适用于IE相关的知识,希望能为你提供帮助。
我们需要在Firefox 52.4.1(与java Applet兼容的最新版本)和Internet Explorer 11上运行使用Java 8 Applet(生病)的旧Web应用程序。
applet基于Java 8,由Apache Tomcat服务器分发。它是签名和混淆的(Proguard)。
用户使用智能卡通过SSL相互身份验证连接到网站(客户端需要PKCS11模块才能从智能卡获取证书)。 SSL相互身份验证也是使用Java Applet完成的。
所有证书都由在每个浏览器,Windows和Java证书库中添加的权限签名。
这里是html代码:
<
object classid='clsid:8AD9C840-044E-11D1-B3E9-00805F499D93' id='AsapiObject'>
<
param name='archive' value='https://www.songbingjia.com/applet/myapplet.jar'/>
<
param name='code' value='https://www.songbingjia.com/android/main.package.Main'/>
<
param name='name' value='https://www.songbingjia.com/android/My Applet'/>
<
param name='mayscript' value='https://www.songbingjia.com/android/true'/>
<
comment>
<
applet id='AsapiApplet'
name='My Applet'
archive='../../../applet/myapplet.jar'
code='main.package.Main'
MAYSCRIPT="MAYSCRIPT">
<
/applet>
<
/comment>
<
/object>
(关注https://docs.oracle.com/javase/8/docs/technotes/guides/jweb/applet/using_tags.html#applet的推荐)
它在IE 11上工作正常,而不是在Mozilla Firefox 52.4.1上工作。两者都是相同的JRE。
在Mozilla Firefox 52.4.1上,我有一个Java异常:
java.lang.ClassNotFoundException: main.package.Main
at sun.plugin2.applet.Applet2ClassLoader.findClass(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadClass0(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at sun.plugin2.applet.Plugin2ClassLoader.loadCode(Unknown Source)
at sun.plugin2.applet.Plugin2Manager.initAppletAdapter(Unknown Source)
at sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Unknown Source)
at java.lang.Thread.run(Thread.java:748)
在此例外之前,我有一个
handshake failure exception
:javax.net.ssl.SSLHandshakeException: Received fatal alert: handshake_failure
at sun.security.ssl.Alerts.getSSLException(Alerts.java:192)
at sun.security.ssl.Alerts.getSSLException(Alerts.java:154)
at sun.security.ssl.SSLSocketImpl.recvAlert(SSLSocketImpl.java:2023)
at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:1125)
at sun.security.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1375)
at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1403)
at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1387)
at sun.net.www.protocol.https.HttpsClient.afterConnect(HttpsClient.java:559)
at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(AbstractDelegateHttpsURLConnection.java:185)
at sun.net.www.protocol.https.HttpsURLConnectionImpl.connect(HttpsURLConnectionImpl.java:153)
at sun.plugin.PluginURLJarFileCallBack.connect(Unknown Source)
at sun.plugin.PluginURLJarFileCallBack.retrieve(Unknown Source)
at sun.net.www.protocol.jar.URLJarFile.retrieve(URLJarFile.java:205)
at sun.net.www.protocol.jar.URLJarFile.getJarFile(URLJarFile.java:71)
at sun.net.www.protocol.jar.JarFileFactory.get(JarFileFactory.java:109)
at sun.net.www.protocol.jar.JarURLConnection.connect(JarURLConnection.java:122)
at sun.plugin.net.protocol.jar.CachedJarURLConnection.connect(Unknown Source)
at sun.plugin.net.protocol.jar.CachedJarURLConnection.getJarFileInternal(Unknown Source)
at sun.plugin.net.protocol.jar.CachedJarURLConnection.getJarFile(Unknown Source)
at com.sun.deploy.security.DeployURLClassPath$JarLoader.getJarFile(Unknown Source)
at com.sun.deploy.security.DeployURLClassPath$JarLoader.access$800(Unknown Source)
at com.sun.deploy.security.DeployURLClassPath$JarLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.deploy.security.DeployURLClassPath$JarLoader.ensureOpen(Unknown Source)
at com.sun.deploy.security.DeployURLClassPath$JarLoader.<
init>
(Unknown Source)
at com.sun.deploy.security.DeployURLClassPath$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.deploy.security.DeployURLClassPath.getLoader(Unknown Source)
at com.sun.deploy.security.DeployURLClassPath.getLoader(Unknown Source)
at com.sun.deploy.security.DeployURLClassPath.getResource(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader$2.run(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader$2.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at sun.plugin2.applet.Plugin2ClassLoader.findClassHelper(Unknown Source)
at sun.plugin2.applet.Applet2ClassLoader.findClass(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadClass0(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at sun.plugin2.applet.Plugin2ClassLoader.loadCode(Unknown Source)
at sun.plugin2.applet.Plugin2Manager.initAppletAdapter(Unknown Source)
at sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Unknown Source)
at java.lang.Thread.run(Thread.java:748)
我认为Firefox无法从智能卡正确导入客户端证书。
编辑:Java控制台中还有另外两个有趣的行:
security: Accessing keys and certificate in Mozilla user profile: null
security: JSS is not configured
通过增加调试模式(
-Djavax.net.debug=all
),我看到:- IE浏览器 :
*** ServerHelloDone[read] MD5 and SHA1 hashes:len = 4 0000: 0E 00 00 00.... ssl: KeyMgr: getting aliases: [XXXXXXX (verified: OK), YYYYYYYYYYYYYY] ssl: Ignoring alias XXXXXXX (1): key algorithm does not match ssl: Ignoring alias XXXXXXX: key algorithm does not match ssl: Ignoring alias XXXXXXX (2): key algorithm does not match ssl: KeyMgr: no matching alias found ssl: Ignoring alias XXXXXXX (1): key algorithm does not match ssl: Ignoring alias XXXXXXX: key algorithm does not match ssl: Ignoring alias XXXXXXX (2): key algorithm does not match ssl: KeyMgr: no matching alias found *** Certificate chain chain [0] = [ ...
- 火狐浏览器 :
*** ServerHelloDone [read] MD5 and SHA1 hashes:len = 4 0000: 0E 00 00 00.... Warning: no suitable certificate found - continuing without client authentication *** Certificate chain < Empty> ***
- 检查Firefox上是否正确安装了IAS_PKCS11模块:
文章图片
- 试图禁用
plugins.click_to_play
(https://support.mozilla.org/fr/questions/933135) - 在
< applet>
(ClassNotFoundException in Java Applet using < object> tag)检查参数顺序 - 清除缓存,添加JRE参数,重新安装JRE ...(https://support.mozilla.org/fr/questions/945083)
- 启用
security.enterprise_roots.enabled
(https://support.umbrella.com/hc/en-us/articles/115000669728-Configuring-Firefox-to-use-the-Windows-Certificate-Store) - 使用
< embed>
或< object>
而不是< applet>
。 - 在Java配置中的高级安全性参数中尝试了很多组合
- 禁用一些安全检查(CRL等)。
- 编辑:根据JDK-6975851,JSS doc,NSS versions,我已经建立了JSS_4_4_20170313基于NSS 3.28.3和NSPR 4.13.1与VS2019 + Windows Kit 10工具和库,Java 8.我已经安装了DLL文件(jss4.dll,libplc4.dll,libnspr4.dll, libzlds4.dll)在Mozilla Firefox目录中,jss4.jar在jre_path / lib / ext目录中。所有这些努力都没有成功...... :(
任何的想法? (我无法将applet切换到另一件事 - 我没有这个选择)
答案看起来问题出在您的网络服务器提供https上。
一个随机的谷歌抛出Mozilla Security Blog。默认情况下,在您使用的Firefox版本中禁用SHA-1(52)。 MD5是一种比SHA-1更差的哈希算法。
【Firefox 52.4.1上的Java Applet“ClassNotFoundException” - 适用于IE】所以大概你应该至少更新网络服务器。如果你不顾一切地继续使用本应该已经装箱的软件,那么我猜你在Firefox中可能仍然有配置选项,或者使用版??本51,但我真的不推荐它。
推荐阅读
- Amazon Corretto支持applets()
- 无法在任何浏览器中打开applet
- 如何使用Nikto Scanner查找Web服务器漏洞
- Nginx Web服务器安全性和强化指南
- 如何查找SQL注入攻击漏洞()
- 8种用于网络管理的最佳IP扫描仪工具
- 监视网站变化的7大工具
- 11种用于监视云和脚本中SSL证书到期的工具
- 如何在Nginx中实现ModSecurity OWASP核心规则集