这可能不是重复的,但以下问题的第二个答案(由 Nikolay Antipov 提供)可能会回答您的问题:
How to check user password in ldap whith java with given LdapContext?
这是一种解决方案,可用于使用 DN 以外的其他内容对用户进行身份验证,例如使用uid
or sAMAccountName
。
要做的步骤是:
- 连接到 LDAP 服务器
- 使用我们知道其 DN 和凭据的服务用户进行身份验证
- 搜索你要认证的用户,用一些属性搜索他(例如
sAMAccountName
)
- 获取我们找到的用户的DN
- 使用找到的 DN 和密码打开另一个与 LDAP 服务器的连接
- 如果找到用户并且身份验证有效,那么您很好
代码示例:
public static boolean performAuthentication() {
// service user
String serviceUserDN = "cn=Mister Service,ou=Users,dc=example,dc=com";
String serviceUserPassword = "abc123#!$";
// user to authenticate
String identifyingAttribute = "uid";
String identifier = "maxdev";
String password = "jkl987.,-";
String base = "ou=Users,dc=example,dc=com";
// LDAP connection info
String ldap = "localhost";
int port = 10389;
String ldapUrl = "ldap://" + ldap + ":" + port;
// first create the service context
DirContext serviceCtx = null;
try {
// use the service user to authenticate
Properties serviceEnv = new Properties();
serviceEnv.put(Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.ldap.LdapCtxFactory");
serviceEnv.put(Context.PROVIDER_URL, ldapUrl);
serviceEnv.put(Context.SECURITY_AUTHENTICATION, "simple");
serviceEnv.put(Context.SECURITY_PRINCIPAL, serviceUserDN);
serviceEnv.put(Context.SECURITY_CREDENTIALS, serviceUserPassword);
serviceCtx = new InitialDirContext(serviceEnv);
// we don't need all attributes, just let it get the identifying one
String[] attributeFilter = { identifyingAttribute };
SearchControls sc = new SearchControls();
sc.setReturningAttributes(attributeFilter);
sc.setSearchScope(SearchControls.SUBTREE_SCOPE);
// use a search filter to find only the user we want to authenticate
String searchFilter = "(" + identifyingAttribute + "=" + identifier + ")";
NamingEnumeration<SearchResult> results = serviceCtx.search(base, searchFilter, sc);
if (results.hasMore()) {
// get the users DN (distinguishedName) from the result
SearchResult result = results.next();
String distinguishedName = result.getNameInNamespace();
// attempt another authentication, now with the user
Properties authEnv = new Properties();
authEnv.put(Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.ldap.LdapCtxFactory");
authEnv.put(Context.PROVIDER_URL, ldapUrl);
authEnv.put(Context.SECURITY_PRINCIPAL, distinguishedName);
authEnv.put(Context.SECURITY_CREDENTIALS, password);
new InitialDirContext(authEnv);
System.out.println("Authentication successful");
return true;
}
} catch (Exception e) {
e.printStackTrace();
} finally {
if (serviceCtx != null) {
try {
serviceCtx.close();
} catch (NamingException e) {
e.printStackTrace();
}
}
}
System.err.println("Authentication failed");
return false;
}