使用 LDAP 从 Active Directory 检索用户属性 - JAVA

2022-01-17 00:00:00 ldap active-directory c# java

我在下面发布了解决方案.

我知道你不喜欢这类问题，但我已经为这个问题苦苦挣扎了半天了.

I know you don't like these type of questions, but i've been struggling with this issue for half a day now.

我编写了一个 C# 代码，它使用 LDAP 从我们的 Active Directory 中获取用户属性，该代码运行良好.

I've written a C# code that fetches user attributes from our Active Directory using LDAP, the code works well.

代码如下:

        DirectoryEntry dirEnt = new DirectoryEntry("LDAP://dc=dom,dc=int");
        DirectorySearcher adSearch = new DirectorySearcher(dirEnt);
        adSearch.SearchScope = SearchScope.Subtree;
        adSearch.PageSize = 10000;
        adSearch.Filter = "(&(objectClass=user))";
        SearchResultCollection sColl = adSearch.FindAll();

        foreach (SearchResult sResult in sColl)
        {
            string sConn = sResult.Properties["distinguishedName"][0].ToString();
            DirectoryEntry dirEnt2 = new DirectoryEntry("LDAP://" + sConn);
            ... 
            // dirEnt2 contains ALL attributes for the user
        }

我正在尝试将此代码移植到 Java，但我在 C# 中使用的技术在 Java 中似乎不太适用.

I'm trying to port this code to Java, but it seems like that the technique I used in C# does not work too well in Java.

使用以下代码

DirContext context;
ArrayList<String> nList = new ArrayList<String>();
Hashtable env = new Hashtable();
String username = ...;
String password = ...;

try {
    env.put(Context.SECURITY_PRINCIPAL, username);
    env.put(Context.SECURITY_CREDENTIALS, password);

    env.put(Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.ldap.LdapCtxFactory");
    env.put(Context.PROVIDER_URL, ldapUri);

    try {
       context   = new InitialDirContext(env);
     } catch (NamingException e) {
        throw new RuntimeException(e);
     }

    SearchControls ctrl = new SearchControls();
    ctrl.setSearchScope(SearchControls.SUBTREE_SCOPE);

    NamingEnumeration enumeration = context.search("", "(objectClass=user)",
                                                   ctrl);
    while (enumeration.hasMore()) {
        SearchResult result = (SearchResult) enumeration.next();
        Attributes attribs = result.getAttributes();
        NamingEnumeration values = ((BasicAttribute) 
                                     attribs.get("distinguishedName")).getAll();
        while (values.hasMore()) {
            nList.add(values.next().toString());
            }
        }

    } catch (NamingException e) {
        e.printStackTrace();
    }

    for (String sVar : nList ){
        Hashtable env2 = new Hashtable();
        env2.put(Context.SECURITY_PRINCIPAL, username);
        env2.put(Context.SECURITY_CREDENTIALS, password);
        env2.put(Context.INITIAL_CONTEXT_FACTORY, 
                 "com.sun.jndi.ldap.LdapCtxFactory");
        env2.put(Context.PROVIDER_URL, "ldap://DOM/" + sVar);
        Attributes attrs = null;
        try {
            context   = new InitialDirContext(env2);
            attrs = context.getAttributes(sVar);
        } catch (NamingException e) {
            System.out.println(e.toString());
            continue;
        }

        System.out.println(attrs.toString());
    }

attrs 只包含关于用户的 BASIC 属性(例如 samaccountname、displayname 等)并且没有电子邮件"、电话"或任何其他类似属性.

Yields that attrs only contains BASIC attributes regarding the user (such as samaccountname, displayname, etc) and no 'email', 'telephone' or any other similar attributes.

对这个问题的任何帮助都是有福的！

Any help on the issue is blessed!

推荐答案

这里是解决方案，抱歉代码/格式混乱

Here's the solution, sorry for the messy code/formatting

import java.util.Hashtable;
import javax.naming.Context;
import javax.naming.NamingEnumeration;
import javax.naming.NamingException;
import javax.naming.directory.*;
import javax.naming.ldap.*;

public class UserFetch {
    public static void main(String[] args) {
        try{
            // Activate paged results
            byte[] cookie = null;
            int count=0;
            int total;

            Hashtable env = new Hashtable();

            env.put(Context.INITIAL_CONTEXT_FACTORY, 
            "com.sun.jndi.ldap.LdapCtxFactory");
            env.put(Context.REFERRAL, "follow");
            env.put(Context.SECURITY_AUTHENTICATION, "Simple");
            env.put(Context.SECURITY_PRINCIPAL, "USERNAME@DOM.COM");
            env.put(Context.SECURITY_CREDENTIALS, "PASSWORD");
            env.put(Context.PROVIDER_URL, "ldap://DOM.COM:389");
            LdapContext ctx = new InitialLdapContext(env, null);

            ctx.setRequestControls(new Control[]{ 
                new PagedResultsControl(10000, Control.CRITICAL) });

            do {
                // Perform the search
                NamingEnumeration results =
                ctx.search("dc=DOM,dc=COM", "(&(objectclass=user)(employeeNumber=*))", getSimpleSearchControls());

                // Iterate over a batch of search results
                while (results != null && results.hasMore()) {
                    // Display an entry
                    SearchResult entry = (SearchResult)results.next();
                    Attributes attrs = entry.getAttributes ();
                    System.out.println(attrs.get("SAMAccountName")); // Username
                    System.out.println("Firstname: " + 
                    attrs.get("givenname")); // firstname
                    System.out.println("Lastname: " + attrs.get("sn")); // lastname
                    System.out.println("EmployeeID " + attrs.get("employeeID"));
                    System.out.println("EmployeeNumber: " + 
                    attrs.get("employeeNumber"));
                    // Handle the entry's response controls (if any)
                }
                // Examine the paged results control response 
                Control[] controls = ctx.getResponseControls();
                if (controls != null) {
                    for (int i = 0; i < controls.length; i++) {
                        if (controls[i] instanceof PagedResultsResponseControl) {
                            PagedResultsResponseControl prrc =
                            (PagedResultsResponseControl)controls[i];
                            total = prrc.getResultSize();
                            cookie = prrc.getCookie();
                        } else {
                            // Handle other response controls (if any)
                        }
                    }
                }

                // Re-activate paged results
                ctx.setRequestControls(new Control[]{
                    new PagedResultsControl(10000, cookie, Control.CRITICAL) });
            } while (cookie != null);
        }  catch (Exception e) {
            e.printStackTrace();
        }
    }

    public static SearchControls getSimpleSearchControls() {
        SearchControls searchControls = new SearchControls();
        searchControls.setSearchScope(SearchControls.SUBTREE_SCOPE);
        searchControls.setTimeLimit(30000);
        String[] attrIDs =
        { "SAMAccountName", "sn", "givenname", "employeeID", 
            "employeeNumber" };

        searchControls.setReturningAttributes(attrIDs);
        return searchControls;
    }


}

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