Hi I am a developer but new to ldap programming. I was able to our Ldap server by providing the DN=ou=app1,ou=development,ou=Group and set my search level to subtree_scope and was able to get to on level down which put me at DN=cn=admin,DN=ou=app1,ou=development,ou=Group. By expanding this DN i see Member(4),OU(1), cn(1),and Objectclasses: top and groupOfNames. I am trying to access the 4 users with uid=user entries. I got the below message when i tried to access uid:
UID... class javax.naming.directory.SearchResult
null
Found cn=Admin:
Attributes are.. No attributes
The following is the snippet of my code. I can provide more if needed
controls.setReturningAttributes("uid");
String filter="(objectClass=groupOfNames)";
NamingEnumeration objs = ctx.search("",filter, controls);
while (objs.hasMoreElements())
{
SearchResult match = (SearchResult)objs.nextElement();
System.out.println(" UID...\t"+ match.getClass());
System.out.println(match.getClassName());
System.out.println("Found "+match.getName()+":");
System.out.println("Attributes are..\t"+match.getAttributes());
Attributes attrs = match.getAttributes();
NamingEnumeration e = attrs.getAll();
while (e.hasMoreElements())
{
Attribute attr = (Attribute) e.nextElement();
System.out.println("Attribute and its class..\t"+attr.getClass());
}
System.out.println("---------------------------------------");
}
}
The SearchControls define the attributes to be returned by the search. You must have set its 'returningAttributes' property to 'new String[0]'. Leave it at null to get all attributes, or specify the ones you want.
Related
My aim is to retrieve all attributes defined on LDAP server by a given objectclass. What I have done so far is:
List<SearchResult> searchLdapUsers = searchLdapUsers(ldapConfig, null, null, null, null, null, 0);
if (searchLdapUsers != null && searchLdapUsers.size() > 0) {
for (SearchResult searchResult : searchLdapUsers) {
Attributes attrs = searchResult.getAttributes();
if (attrs != null) {
NamingEnumeration<? extends Attribute> all = attrs.getAll();
while (all.hasMoreElements()) {
Attribute attribute = (Attribute) all.nextElement();
hs.put(attribute.getID(), attribute.getID());
}
}
}
}
This code will query all users from LDAP server and get attribute definition. This is working fine but will get problem with large number of users.
Is there any other way to find directly the given object class and get all attribute definition inside?
Most LDAP servers expose their schema through LDAP, and per LDAP specifications, every entry should have an operational attribute (subSchemaSubEntry) that points to the Schema entry. So reading the schema, should give you all objectClasses and their attributes definitions.
I am trying to retrieve information from an active directory. It is working so far except I am not able to retrieve extended properties.
LDAP search filter:
String searchFilter = "(&(objectClass=user)(employeeId=*))";
String searchBase = "dc=DOM,dc=TLD";
String returnedAtts[]={"userPrincipalName"};
searchCtls.setReturningAttributes(returnedAtts);
NamingEnumeration<SearchResult> answer = ldapContext.search(searchBase, searchFilter, searchCtls);
while (answer.hasMoreElements())
{
SearchResult sr = (SearchResult)answer.next();
Attributes attrs = sr.getAttributes();
System.out.println(attrs.get("userPrincipalName"));
System.out.println(attrs.get("employeeId"));
}
Unfortunately I can retrieve only the default properties. How can I retrieve the extended properties?
Is there anything wrong with the code or did I forget something? Are the extended properties depending on user permissions?
finally i solved it by adding the property names to the returning attributes:
String returnedAtts[]={"userPrincipalName","department","employeeID","mail"};
searchCtls.setReturningAttributes(returnedAtts);
I am trying to fetch LDAP User internal attributes, but couldn't find how to fetch them
DirContext ctx = this.getDirContext();
List<Employee> list = new ArrayList<Employee>();
NamingEnumeration<SearchResult> results = null;
try {
SearchControls controls = new SearchControls();
controls.setSearchScope(SearchControls.SUBTREE_SCOPE);
results = ctx.search("", "(objectclass=person)", controls);
while (results.hasMore()) {
SearchResult searchResult = results.next();
Attributes attributes = searchResult.getAttributes();
String fullName = this.getValue(attributes.get("cn"));
//so on...
}
// so on
from LDAP, I want to fetch each employee/person internal attributes too.
By Default, it's not returning the internal attributes [ex: createTimestamp]
You won't get any operational attributes unless you ask for them. At present you aren't asking for any attributes, which is equivalent to constructing the SearchControls, or calling SearchControls.setReturningAttributes(String[]) afterwards, using the argument new String[]{"*"}:this gives you all the non-operational attributes.
To get the operational attributes as well, use the argument new String[]{"*","+"}.
if you could please explain to me one piece of the following code that I don't quite understand I would be grateful:
What does (&(cn=*)({0}={1})) mean in the filter field?
I know that cn means search for the cn attribute and then ADD the result to ({0}={1}).
What is the meaning of ({0}={1})?
Here's the code:
try {
// Create initial context
ctx = new InitialDirContext(env);
Attributes matchAttrs = new BasicAttributes(true);
matchAttrs.put(new BasicAttribute(ldap_id_field, netid));
String attlist[] = {ldap_email_field, ldap_givenname_field,
ldap_surname_field, ldap_phone_field};
// look up attributes
try {
SearchControls ctls = new SearchControls();
ctls.setReturningAttributes(attlist);
NamingEnumeration answer =
ctx.search(ldap_search_context, "(&(cn=*)({0}={1}))", new Object[] {ldap_id_field,netid},ctls);
}
...
It looks wrong to me. All that filter does is find entries which have any CN and which match an attribute name/value pair specified as arguments to the search, in ldap_id_field and netid respectively. There is no 'adding' going on: the & means that both filter-expressions must match.
I have created an Active Directory client using JNDI, that has the ability to query for attributes, as well as modify existing ones. I have the need to modify the "msExchHideFromAddressLists" to set it equal to false, but I get a null pointer exception when trying to query for it. Any insight? Thanks
String filter = "(&(objectCategory=user) (sAMAccountName=" + sAMAccountName + "))";
results = ctx.search(ou, filter, controls);
while(results.hasMore()) {
SearchResult searchResult = (SearchResult) results.next();
Attributes attributes = searchResult.getAttributes();
Attribute attr = attributes.get("msExchHideFromAddressLists");
String output = (String) attr.get();
}
I found out what the issue was. Apparently, the "msExchHideFromAddressLists" attribute is not valued by default, so a query on it was returning a nullPointerException. To modify this attribute, simply set the value to "TRUE" or "FALSE".
ModificationItem[] mods = new ModificationItem[1];
mods[0] = new ModificationItem(DirContext.REPLACE_ATTRIBUTE, new BasicAttribute("msExchHideFromAddressLists", "TRUE"));