General ECM Questions

Get user details from LDAP

  • LDAP
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FunMaster

import java.util.Hashtable;
import java.util.Properties;
import javax.naming.Context;
import javax.naming.NamingEnumeration;
import javax.naming.NamingException;
import javax.naming.directory.Attribute;
import javax.naming.directory.Attributes;
import javax.naming.directory.DirContext;
import javax.naming.directory.InitialDirContext;
import javax.naming.directory.SearchControls;
import javax.naming.directory.SearchResult;

public class LDAPUserDetailsFetcher {

    private static final String LDAP_SEARCH_BASE = "DC=MyCompany,DC=com"; // LDAP base DN
    private static DirContext dirContext = null;

    // Establish connection to the LDAP server
    private static DirContext establishLdapConnection() throws Exception {
        final Properties ldapProps = new Properties();
        ldapProps.put(Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.ldap.LdapCtxFactory");
        ldapProps.put(Context.PROVIDER_URL, "ldap://localhost:389");
        ldapProps.put(Context.SECURITY_AUTHENTICATION, "simple");
        ldapProps.put(Context.SECURITY_PRINCIPAL, "CN=adminUser");
        ldapProps.put(Context.SECURITY_CREDENTIALS, "adminPassword");

        return new InitialDirContext(ldapProps);
    }

    // Fetch user details based on a search identifier (userID or other attributes)
    public String[] fetchUserDetails(String searchKey) throws Exception {
        String userDisplayName = "";
        String userLocation = "";
        String attributeValue = "";

        DirContext context = establishLdapConnection();

        // Attributes to be retrieved
        String[] attributesToFetch = { "displayName", "userPrincipalName", "cn", "mail", "sn", "company", "department", "memberof" };
        String[] userAttributeValues = new String[2];

        // Search controls configuration
        SearchControls searchControls = new SearchControls();
        searchControls.setSearchScope(SearchControls.SUBTREE_SCOPE); // Define scope of the search (subtree)
        searchControls.setReturningAttributes(attributesToFetch);

        // LDAP search filter based on the userID or identifier
        String searchFilter = searchKey;

        NamingEnumeration<SearchResult> results = context.search(LDAP_SEARCH_BASE, searchFilter, searchControls);

        // If no results found, return userID as fallback
        if (!results.hasMoreElements()) {
            userAttributeValues[0] = searchKey;
        } else {
            while (results.hasMoreElements()) {
                SearchResult searchResult = results.next();
                Attributes attributes = searchResult.getAttributes();

                if (attributes.size() == 0) {
                    System.out.println("No attributes found for user.");
                } else {
                    try {
                        // Iterate through all attributes and extract their values
                        for (NamingEnumeration<? extends Attribute> attrEnum = attributes.getAll(); attrEnum.hasMore(); ) {
                            Attribute attribute = attrEnum.next();
                            String attributeID = attribute.getID();

                            NamingEnumeration<?> attributeValues = attribute.getAll();
                            if (!attributeValues.hasMore()) {
                                userAttributeValues[0] = searchKey; // If no value for this attribute, return searchKey
                            } else {
                                while (attributeValues.hasMore()) {
                                    attributeValue = (String) attributeValues.next();
                                    if (attributeID.equalsIgnoreCase("displayName")) {
                                        userDisplayName = attributeValue;
                                        userAttributeValues[0] = (userDisplayName != null && !userDisplayName.isEmpty()) ? userDisplayName : searchKey;
                                    } else if (attributeID.equalsIgnoreCase("physicalDeliveryOfficeName")) {
                                        userLocation = attributeValue;
                                        userAttributeValues[1] = userLocation;
                                    }
                                }
                            }
                        }
                    } catch (NamingException e) {
                        System.out.println("[LDAP] Error retrieving attributes from LDAP: " + e.getMessage());
                    }
                }
            }
        }

        return userAttributeValues;
    }

    // Main method to execute the search
    public static void main(String[] args) throws Exception {
        LDAPUserDetailsFetcher ldapFetcher = new LDAPUserDetailsFetcher();
        String[] userDetails = ldapFetcher.fetchUserDetails("cn=user123"); // Example: Search by cn or other attributes
        System.out.println("Display Name: " + userDetails[0]);
        System.out.println("Location: " + userDetails[1]);
    }
}

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