不多說直接看代碼,如下:
import java.util.Hashtable;
import javax.naming.AuthenticationException;
import javax.naming.Context;
import javax.naming.NamingEnumeration;
import javax.naming.NamingException;
import javax.naming.directory.SearchControls;
import javax.naming.directory.SearchResult;
import javax.naming.ldap.Control;
import javax.naming.ldap.InitialLdapContext;
import javax.naming.ldap.LdapContext;
/**
* 用戶登陸認證,LDAP跨域認證,通過LDAP對用戶進行更新
*
*/
public class LdapCheck {
private static LdapContext ctx = null;
private static Control[] connCtls = null;
/**** 定義LDAP的基本連接信息 ******/
// LDAP的連接地址(ldap://ip:port/)port默認爲389
private static String URL = "?";
// LDAP的根DN
private static String BASEDN = "dc=?,dc=?,dc=?";
// LDAP的連接賬號(身份認證管理平臺添加的應用賬號,應用賬號格式:uid=?,ou=?,dc=????)
private static String PRINCIPAL = "uid=?,ou=?,dc=?,dc=?,dc=?";
// LDAP的連接賬號的密碼(身份認證管理平臺添加的應用賬號的密碼)
private static String PASSWORD = "?";
public static void main(String[] args) {
// 登錄用戶的用戶名和密碼
String username = "?";
String password = "?";
System.out.println(authenticate(username, password));
closeCtx();
}
// 校驗用戶名密碼的方法
public static boolean authenticate(String usr, String pwd) {
boolean valide = false;
if (pwd == null || pwd == "")
return false;
if (ctx == null) {
getCtx();
}
String userDN = getUserDN(usr);
if ("".equals(userDN) || userDN == null) {
return false;
}
try {
ctx.addToEnvironment(Context.SECURITY_PRINCIPAL, userDN);
ctx.addToEnvironment(Context.SECURITY_CREDENTIALS, pwd);
ctx.reconnect(connCtls);
valide = true;
} catch (AuthenticationException e) {
System.out.println(userDN + " is not authenticated");
System.out.println(e.toString());
valide = false;
} catch (NamingException e) {
System.out.println(userDN + " is not authenticated");
valide = false;
}
return valide;
}
public static void getCtx() {
if (ctx != null) {
return;
}
Hashtable<String, String> env = new Hashtable<String, String>();
env.put(Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.ldap.LdapCtxFactory");
env.put(Context.PROVIDER_URL, URL + BASEDN);
env.put(Context.SECURITY_AUTHENTICATION, "simple");
env.put(Context.SECURITY_PRINCIPAL, PRINCIPAL);
env.put(Context.SECURITY_CREDENTIALS, PASSWORD);
try {
// 鏈接ldap
ctx = new InitialLdapContext(env, connCtls);
} catch (javax.naming.AuthenticationException e) {
System.out.println("Authentication faild: " + e.toString());
} catch (Exception e) {
System.out.println("Something wrong while authenticating: " + e.toString());
}
}
public static void closeCtx() {
try {
if (ctx != null)
ctx.close();
} catch (NamingException ex) {
}
}
public static String getUserDN(String uid) {
String userDN = "";
try {
SearchControls constraints = new SearchControls();
constraints.setSearchScope(SearchControls.SUBTREE_SCOPE);
NamingEnumeration<?> en = ctx.search("", "uid=" + uid, constraints);
if (en == null) {
System.out.println("Have no NamingEnumeration.");
}
if (!en.hasMoreElements()) {
System.out.println("Have no element.");
}
while (en != null && en.hasMoreElements()) {
Object obj = en.nextElement();
if (obj instanceof SearchResult) {
SearchResult si = (SearchResult) obj;
userDN += si.getName();
userDN += "," + BASEDN;
} else {
System.out.println(obj);
}
System.out.println();
}
} catch (Exception e) {
System.out.println("Exception in search():" + e);
}
return userDN;
}
}