Java到Active Directory LDAP Java.net.SocketException：连接或出站已关闭

Question

到目前为止，我已经面临这个错误几天了，尽管在web上寻找解决方案，但我还是修复了这个错误。

import java.util.Hashtable;
import javax.naming.Context;
import javax.naming.NamingEnumeration;
import javax.naming.directory.Attribute;
import javax.naming.directory.Attributes;
import javax.naming.directory.BasicAttribute;
import javax.naming.directory.BasicAttributes;
import javax.naming.directory.DirContext;
import javax.naming.directory.InitialDirContext;

public class LDAPtest {
public static void main(String[] args) {
    
    try {
        
        String keystorePath = "C:/Program Files/Java/jdk-13.0.2/lib/security/cacerts";
        System.setProperty("javax.net.ssl.keyStore", keystorePath);
         
        System.setProperty("javax.net.ssl.keyStorePassword", "changeit");
        
        Hashtable<String, String> ldapEnv = new Hashtable<>(); 
        ldapEnv.put(Context.INITIAL_CONTEXT_FACTORY,"com.sun.jndi.ldap.LdapCtxFactory");
        ldapEnv.put(Context.PROVIDER_URL, "ldaps://localhost:10636");
        ldapEnv.put(Context.SECURITY_AUTHENTICATION,"simple");
        ldapEnv.put(Context.SECURITY_PRINCIPAL,"uid=admin,ou=system");
        ldapEnv.put(Context.SECURITY_CREDENTIALS,"secret");
        
        DirContext connection = new InitialDirContext(ldapEnv);
        System.out.println("Benvenuto " + connection);
        NamingEnumeration enm = connection.list("");

        while (enm.hasMore()) {
            System.out.println(enm.next());
        }

        enm.close();
        connection.close();
        
        
    }catch(Exception e) {
        e.printStackTrace();
    }
    
}

}

当不测试SSL时，此代码实际上是有效的，它替换了

ldapEnv.put(Context.PROVIDER_URL, "ldaps://localhost:10636");

ldapEnv.put(Context.PROVIDER_URL, "ldap://localhost:10389");

javax.naming.CommunicationException: simple bind failed: localhost:10636 [Root exception is 
java.net.SocketException: Connection or outbound has closed]
at java.naming/com.sun.jndi.ldap.LdapClient.authenticate(LdapClient.java:219)
at java.naming/com.sun.jndi.ldap.LdapCtx.connect(LdapCtx.java:2795)
at java.naming/com.sun.jndi.ldap.LdapCtx.<init>(LdapCtx.java:320)
at java.naming/com.sun.jndi.ldap.LdapCtxFactory.getLdapCtxFromUrl(LdapCtxFactory.java:225)
at java.naming/com.sun.jndi.ldap.LdapCtxFactory.getUsingURL(LdapCtxFactory.java:189)
at java.naming/com.sun.jndi.ldap.LdapCtxFactory.getUsingURLs(LdapCtxFactory.java:243)
at java.naming/com.sun.jndi.ldap.LdapCtxFactory.getLdapCtxInstance(LdapCtxFactory.java:154)
at java.naming/com.sun.jndi.ldap.LdapCtxFactory.getInitialContext(LdapCtxFactory.java:84)
at java.naming/javax.naming.spi.NamingManager.getInitialContext(NamingManager.java:730)
at java.naming/javax.naming.InitialContext.getDefaultInitCtx(InitialContext.java:305)
at java.naming/javax.naming.InitialContext.init(InitialContext.java:236)
at java.naming/javax.naming.InitialContext.<init>(InitialContext.java:208)
at java.naming/javax.naming.directory.InitialDirContext.<init>(InitialDirContext.java:130)
at Prova3.main(Prova3.java:31)
Caused by: java.net.SocketException: Connection or outbound has closed
at java.base/sun.security.ssl.SSLSocketImpl$AppOutputStream.write(SSLSocketImpl.java:1246)
at java.base/java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:81)
at java.base/java.io.BufferedOutputStream.flush(BufferedOutputStream.java:142)
at java.naming/com.sun.jndi.ldap.Connection.writeRequest(Connection.java:398)
at java.naming/com.sun.jndi.ldap.Connection.writeRequest(Connection.java:371)
at java.naming/com.sun.jndi.ldap.LdapClient.ldapBind(LdapClient.java:359)
at java.naming/com.sun.jndi.ldap.LdapClient.authenticate(LdapClient.java:214)
... 13 more

Answer 1

对于谷歌人来说：

简单绑定失败错误几乎总是与SSL连接有关。

使用nc或telnet检查是否可以在客户端与远程主机和端口之间建立连接。

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