I'm creating an LDAP class that contains a function that returns the managers username of the current user.
I know that I can use the "manager" attribute to return CN="name", OU="group", DC="company" etc.
I specifically want the managers username, does anyone know if there is an attribute string that I can send to LDAP that specifically gets the managers username only? If not, is there an alternative method to do so?
The above GetManager works great except when no manager has been set up. Slight alteration to accommodate this scenario:
// return manager for a given user
public UserPrincipal GetManager(PrincipalContext ctx, UserPrincipal user) {
if (user != null) {
// get the DirectoryEntry behind the UserPrincipal object
var dirEntryForUser = user.GetUnderlyingObject() as DirectoryEntry;
if (dirEntryForUser != null) {
// check to see if we have a manager name - if so, grab it
if (dirEntryForUser.Properties["manager"] != null && dirEntryForUser.Properties["manager"].Count > 0) {
string managerDN = dirEntryForUser.Properties["manager"][0].ToString();
// find the manager UserPrincipal via the managerDN
return UserPrincipal.FindByIdentity(ctx, managerDN);
}
}
}
return null;
}
I have figured out the resolution to this now.
Basically, the manager attribute in LDAP retrives the distinguishedName attribute of the maanger user.
So if I search LDAP for the user containing the distinguishedName that is returned from the manager then I can get any of their attributes that way.
One possible solution would be to use something like this - this requires that you're on .NET 3.5 and you have referenced both System.DirectoryServices as well as System.DirectoryServices.AccountManagement:
// return manager for a given user
public UserPrincipal GetManager(PrincipalContext ctx, UserPrincipal user)
{
UserPrincipal result = null;
if (user != null)
{
// get the DirectoryEntry behind the UserPrincipal object
DirectoryEntry dirEntryForUser = user.GetUnderlyingObject() as DirectoryEntry;
if (dirEntryForUser != null)
{
// check to see if we have a manager name - if so, grab it
if (dirEntryForUser.Properties["manager"] != null)
{
string managerDN = dirEntryForUser.Properties["manager"][0].ToString();
// find the manager UserPrincipal via the managerDN
result = UserPrincipal.FindByIdentity(ctx, managerDN);
}
}
}
return result;
}
And you could then call this method e.g. like this:
// Create default domain context
PrincipalContext ctx = new PrincipalContext(ContextType.Domain);
// find yourself - you could also search for other users here
UserPrincipal myself = UserPrincipal.Current;
// get the manager for myself
UserPrincipal myManager = GetManager(ctx, myself);
Both examples work fine. But I believe there's space for improvements.
Methods should not be checking if parameter is null, and returning null is a bad habit. hrowing exceptions, on the other hand, is more adequate.
Instead of asking for a context it should be possible to retrieve the context from the provided UserPrincipal, thus there shouldn't be any problems finding the current user.
public static UserPrincipal GetManager(UserPrincipal user)
{
var userEntry = user.GetUnderlyingObject() as DirectoryEntry;
if (userEntry.Properties["manager"] != null
&& userEntry.Properties["manager"].Count > 0)
{
string managerDN = userEntry.Properties["manager"][0].ToString();
return UserPrincipal.FindByIdentity(user.Context,managerDN);
}
else
throw new UserHasNoManagerException();
}
class UserHasNoManagerException : Exception
{ }
Related
I am making an Active Directry managment tool but I am having trouble getting somethings working.
While I made a class where I want to find a specific user and return als his information(Name,Fullname,CN,...). I can find all this information but when I don't know the best way to return all the values from my class.
Here is the code I use so far:
DirectorySearcher search = new DirectorySearcher(ldapConnectie);
search.Filter = "(cn=" + username + ")";
SearchResult result = search.FindOne();
if (result != null)
{
List<string> listLdapFields = new List<string>();
List<Object> listLdapValues = new List<Object>();
ResultPropertyCollection fields = result.Properties;
foreach (String ldapField in fields.PropertyNames)
{
listLdapFields.Add(ldapField);
foreach (Object myCollection in fields[ldapField])
{
listLdapValues.Add(myCollection);
}
}
}
The program add everything well to a list. But if I return this I cannot search the list on "CN" or "Name". I can only find the information on Index Number.
Hope you can help me out.
If you're on .NET 3.5 and up, you should check out the System.DirectoryServices.AccountManagement (S.DS.AM) namespace. Read all about it here:
Managing Directory Security Principals in the .NET Framework 3.5
MSDN docs on System.DirectoryServices.AccountManagement
Basically, you can define a domain context and easily find users and/or groups in AD:
// set up domain context
using (PrincipalContext ctx = new PrincipalContext(ContextType.Domain))
{
// find a user
UserPrincipal user = UserPrincipal.FindByIdentity(ctx, username);
if(user != null)
{
// do something here....
// the most often used attributes are available as nice, strongly-typed properties
string value = user.GivenName;
value = user.Surname;
value = user.EmailAddress;
value = user.VoiceTelephoneNumber;
}
}
The new S.DS.AM makes it really easy to play around with users and groups in AD!
Here's an approach where you can call the property by name. It also uses the authenticated account making the request.
string domainPath = String.Format("LDAP://{0},DC=site,DC=com", domain);
using (DirectoryEntry searchRoot = new DirectoryEntry(domainPath))
{
using (DirectorySearcher search =
filterSearch(new DirectorySearcher(searchRoot), username))
{
SearchResult result = null;
try
{
result = search.FindOne();
}
catch (DirectoryServicesCOMException e)
{
//handle the error
}
if (result != null)
{
string givenname = result.Properties["givenname"].Count > 0 ?
(string)result.Properties["givenname"][0] : "";
string sn = result.Properties["sn"].Count > 0 ?
(string)result.Properties["sn"][0] : "";
var samaccount= result.Properties["samaccountname"].Count > 0 ?
(string)result.Properties["samaccountname"][0] : "";
var name = String.Format("{0}, {1}", sn, givenname);
var email = result.Properties["mail"].Count > 0 ?
(string)result.Properties["mail"][0] : "";
}
}
}
//Apply a filter to search only specific classes and categories.
//Add the specific properties to be retrieved
private DirectorySearcher filterSearch(DirectorySearcher search, string username)
{
DirectorySearcher filteredSearch = search;
filteredSearch.Filter = "(&(objectClass=user)(objectCategory=person)(samaccountname=" + username + "))";
filteredSearch.PropertiesToLoad.Add("givenname");
filteredSearch.PropertiesToLoad.Add("sn");
filteredSearch.PropertiesToLoad.Add("samaccountname");
filteredSearch.PropertiesToLoad.Add("department");
filteredSearch.PropertiesToLoad.Add("physicalDeliveryOfficeName");
filteredSearch.PropertiesToLoad.Add("mail");
return filteredSearch;
}
This may be helpful if looking for specific properties, but if you want to retrieve a list of all attributes/values, take a look at this other SO question.
Google has a list of common filters you can use. Take a look through them and modify the filterSearch method appropriately.
We are using the foll. code to retrieve the AD users and their details:-
We get error at line: SearchResultCollection resultCol =
search.FindAll();
Exception is: DirectoryServiceCOMException: An operations error
occurred. at System.DirectoryServices.DirectoryEntry.Bind(Boolean
throwIfFail) at System.DirectoryServices.DirectoryEntry.Bind()
at System.DirectoryServices.DirectoryEntry.get_AdsObject() at
System.DirectoryServices.DirectorySearcher.FindAll(Boolean
findMoreThanOne) at
SharePointProject20.VisualWebPart1.VisualWebPart1.GetADUsers()
public List<Users> GetADUsers()
{
try
{
List<Users> lstADUsers = new List<Users>();
string DomainPath = "LDAP://DC=SYSDOM,DC=local";
DirectoryEntry searchRoot = new DirectoryEntry(DomainPath);
DirectorySearcher search = new DirectorySearcher(searchRoot);
search.Filter = "(&(objectClass=user)(objectCategory=person))";
search.PropertiesToLoad.Add("samaccountname");
search.PropertiesToLoad.Add("mail");
search.PropertiesToLoad.Add("usergroup");
search.PropertiesToLoad.Add("displayname");//first name
SearchResult result;
SearchResultCollection resultCol = search.FindAll();
if (resultCol != null)
{
for (int counter = 0; counter < resultCol.Count; counter++)
{
string UserNameEmailString = string.Empty;
result = resultCol[counter];
if (result.Properties.Contains("samaccountname") &&
result.Properties.Contains("mail") &&
result.Properties.Contains("displayname"))
{
Users objSurveyUsers = new Users();
objSurveyUsers.Email = (String)result.Properties["mail"][0] +
"^" + (String)result.Properties["displayname"][0];
objSurveyUsers.UserName = (String)result.Properties["samaccountname"][0];
objSurveyUsers.DisplayName = (String)result.Properties["displayname"][0];
lstADUsers.Add(objSurveyUsers);
}
}
}
return lstADUsers;
}
catch (Exception ex)
{
return null;
}
}
public class Users
{
public string Email { get; set; }
public string UserName { get; set; }
public string DisplayName { get; set; }
public bool isMapped { get; set; }
}
What could be the issue?
Our domain name is SYSDOM.local
Could it be related to permissions (how do I verify this with network admin guys?), or do I need to explicitly pass username/password?
Code reference: http://www.codeproject.com/Tips/599697/Get-list-of-Active-Directory-users-in-Csharp
If you're on .NET 3.5 and up, you should check out the System.DirectoryServices.AccountManagement (S.DS.AM) namespace. You can use a PrincipalSearcher and a "query-by-example" principal to do your searching:
// create your domain context
using (PrincipalContext ctx = new PrincipalContext(ContextType.Domain))
{
// define a "query-by-example" principal - here, we search for a UserPrincipal
UserPrincipal qbeUser = new UserPrincipal(ctx);
// create your principal searcher passing in the QBE principal
PrincipalSearcher srch = new PrincipalSearcher(qbeUser);
// find all matches
foreach(var found in srch.FindAll())
{
// do whatever here - "found" is of type "Principal" - it could be user, group, computer.....
}
}
If you haven't already - absolutely read the MSDN article Managing Directory Security Principals in the .NET Framework 3.5 which shows nicely how to make the best use of the new features in System.DirectoryServices.AccountManagement. Or see the MSDN documentation on the System.DirectoryServices.AccountManagement namespace.
Of course, depending on your need, you might want to specify other properties on that "query-by-example" user principal you create:
DisplayName (typically: first name + space + last name)
SAM Account Name - your Windows/AD account name
User Principal Name - your "username#yourcompany.com" style name
You can specify any of the properties on the UserPrincipal and use those as "query-by-example" for your PrincipalSearcher.
Constructing the PrincipalContext like shown in the sample will automatically connect to the current AD domain with the current user credentials. If you need to, you can specify other containers or domains to bind to, or you can also supply alternative credentials by using other overloads of the PrincipalContext constructor
The issue was resolved after using the HostingEnvironment.Impersonate() in PageLoad:-
Example:
using (HostingEnvironment.Impersonate()) {
GetADUsers();
}
How To Get User group of user from LDAP active directory in C# .NET for ASP. In my Scenario I want to Pass user name to method which query from LDAP Active directory and tell me my user is Member of This User Groups. Please help me in this
If you're on .NET 3.5 or newer, you can also use the new System.DirectoryServices.AccountManagement (S.DS.AM) namespaces.
With this, you can do something like:
// create context for domain
PrincipalContext ctx = new PrincipalContext(ContextType.Domain);
// find the user
UserPrincipal up = UserPrincipal.FindByIdentity(ctx, "YourUserName");
if(up != null)
{
// get groups for that user
var authGroups = up.GetAuthorizationGroups();
}
Read more about the new S.DS.AM namespace:
Managing Directory Security Principals in the .NET Framework 3.5
Look into using the System.DirectoryServices namespace. You can use a DirectorySearcher to find the user. Once you have the DirectoryEntry object for that user do this:
public List<string> GetMemberOf(DirectoryEntry de)
{
List<string> memberof = new List<string>();
foreach (object oMember in de.Properties["memberOf"])
{
memberof.Add(oMember.ToString());
}
return memberof;
}
This will return a list of strings which are the group names the user is a member of.
Of course you could further refine this to include the DirectorySearcher code so you can just pass the function the samAccountName.
try this...
public override string[] GetRolesForUser(string username)
{
var allRoles = new List<string>();
var root = new DirectoryEntry(WebConfigurationManager.ConnectionStrings[ConnectionStringName].ConnectionString,
ConnectionUsername,
ConnectionPassword);
var searcher = new DirectorySearcher(root,
string.Format(CultureInfo.InvariantCulture, "(&(objectClass=user)({0}={1}))",
AttributeMapUsername,
username));
searcher.PropertiesToLoad.Add("memberOf");
SearchResult result = searcher.FindOne();
if (result != null && !string.IsNullOrEmpty(result.Path))
{
DirectoryEntry user = result.GetDirectoryEntry();
PropertyValueCollection groups = user.Properties["memberOf"];
foreach (string path in groups)
{
string[] parts = path.Split(',');
if (parts.Length > 0)
{
foreach (string part in parts)
{
string[] p = part.Split('=');
if (p[0].Equals("cn", StringComparison.OrdinalIgnoreCase))
{
allRoles.Add(p[1]);
}
}
}
}
}
return allRoles.ToArray();
}
Use the DirectorySearcher class to preform an ldap query.
For reference:
http://www.codeproject.com/KB/system/QueryADwithDotNet.aspx
I needed a method of authenticating a user and a check to see if they were in a specific user group. I did it by pushing the username and password and loading the "memberOf" property into the 'search' instance. Example below will display all the groups for that specific user name. The 'catch' statement will trap a wrong user name or password.
DirectoryEntry entry = new DirectoryEntry("LDAP://xxxxxxxx/OU=xxxxxxx,DC=xxxxxx,DC=xxxxx,DC=xxxxxx", strLdapUserName, strLdapPassword);
try
{
//the object is needed to fire off the ldap connection
object obj = entry.NativeObject;
DirectorySearcher search = new DirectorySearcher(entry);
search.Filter = "(SAMAccountName=" + strLdapUserName + ")";
search.PropertiesToLoad.Add("memberOf");
SearchResult result = search.FindOne();
string filterAttribute = (String)result.Properties["cn"][0];
foreach(string groupMemberShipName in result.Properties["memberOf"])
{
Console.WriteLine("Member of - {0}", groupMemberShipName);
}
}
catch (Exception ex)
{
//failed to authenticate
throw new Exception(ex.ToString());
}
Hope this helps. (Remember to reference System.DirectoryServices)
I think most methods listed above should work, but i would suggest adding code to ensure that your code can "detect circular loops in nested group memberships", and if found, break any infinite loops that your script of choice could potentially get into.
How I can get my first name last name with c# in my system (logging in windows with Active Directory username and pass)?
Is it possible to do that without going to the AD?
If you're using .Net 3.0 or higher, there's a lovely library that makes this practically write itself. System.DirectoryServices.AccountManagement has a UserPrincipal object that gets exactly what you are looking for and you don't have to mess with LDAP or drop to system calls to do it. Here's all it'd take:
Thread.GetDomain().SetPrincipalPolicy(PrincipalPolicy.WindowsPrincipal);
WindowsPrincipal principal = (WindowsPrincipal)Thread.CurrentPrincipal;
// or, if you're in Asp.Net with windows authentication you can use:
// WindowsPrincipal principal = (WindowsPrincipal)User;
using (PrincipalContext pc = new PrincipalContext(ContextType.Domain))
{
UserPrincipal up = UserPrincipal.FindByIdentity(pc, principal.Identity.Name);
return up.DisplayName;
// or return up.GivenName + " " + up.Surname;
}
Note: you don't actually need the principal if you already have the username, but if you're running under the users context, it's just as easy to pull it from there.
There is an easier way to do this:
using System.DirectoryServices.AccountManagement;
UserPrincipal userPrincipal = UserPrincipal.Current;
String name = userPrincipal.DisplayName;
This solution didn't work for me but this function worked great:
public static string GetUserFullName(string domain, string userName)
{
DirectoryEntry userEntry = new DirectoryEntry("WinNT://" + domain + "/" + userName + ",User");
return (string)userEntry.Properties["fullname"].Value;
}
You should call it that way:
GetUserFullName(Environment.UserDomainName, Environment.UserName);
(Found it here).
The problem with the approved answer is that if you have a policy of Lastname, Firstname in place, then DisplayName gives Smith, John, not John Smith. There are two ways to get the correct form, the userPrincipal.Name property contains "John Smith (jsmith1)" so you could use this, and just string.Split on "(". Or use the following:
private string ConvertUserNameToDisplayName(string currentSentencedByUsername)
{
string name = "";
using (var context = new PrincipalContext(ContextType.Domain))
{
var usr = UserPrincipal.FindByIdentity(context, currentSentencedByUsername);
if (usr != null)
name = usr.GivenName+" "+usr.Surname;
}
if (name == "")
throw new Exception("The UserId is not present in Active Directory");
return name;
}
This would give the required form "John Smith" as required by the original poster.
The fastest way is to bind directly to their AD object using their SID, which you already have. For example:
//ASP.NET
var identity = (WindowsIdentity) HttpContext.Current.User.Identity;
//Desktop
var identity = WindowsIdentity.GetCurrent();
var user = new DirectoryEntry($"LDAP://<SID={identity.User.Value}>");
//Ask for only the attributes you want to read.
//If you omit this, it will end up getting every attribute with a value,
//which is unnecessary.
user.RefreshCache(new [] { "givenName", "sn" });
var firstName = user.Properties["givenName"].Value;
var lastName = user.Properties["sn"].Value;
Had the same issue. After some research and browsing the Microsoft Docs, I found the solution.
First install the System.DirectoryServices.AccountManagement package using Nuget Package Manager.
Then while calling the GetUserNameWithoutDomain method pass the following as the parameters:
GetUserNameWithoutDomain(UserPrincipal.Current.GivenName, UserPrincipal.Current.Surname);
This should definitely work!
I am using this simple method of finding a user in the current domain, that works for all users that 'exist' but I can't find any way to determine if the user does not exist.
string userLDAP = #"MYDOMAIN/username";
string path = "WinNT://" + userLDAP ;
DirectoryEntry root = new DirectoryEntry(path, null, null, AuthenticationTypes.Secure);
Other than letting an exception be thrown, how can I use a directory entry to determine if a user does not exist?
if (root.Properties != null)
if (root.Properties["objectSid"] != null) //// EXCEPTION HERE
if (root.Properties["objectSid"][0] != null)
It's better to use DirectorySearcher for this purpose...
string userName = "TargetUserName";
using (DirectorySearcher searcher = new DirectorySearcher("GC://yourdomain.com"))
{
searcher.Filter = string.Format("(&(objectClass=user)(sAMAccountName={0}))", userName);
using (SearchResultCollection results = searcher.FindAll())
{
if (results.Count > 0)
Debug.WriteLine("Found User");
}
}
This sample will search and entire forest including child domains. If you want to target only a single domain use "LDAP://mydomain.com" instead of "GC://mydomain.com". You can also supply searcher.SearchRoot with a DirectoryEntry to use as the root of a search (i.e. a specific OU or domain).
Don't forget most of the AD stuff is IDisposable so dispose properly as shown above.
I think an easy way to check if your DirectoryEntry object points to an existing AD entry is using the static Exists method.
So your code may look like this:
using(DirectoryEntry de = new DirectoryEntry(....)) {
// now we check if the related object exists
bool exists = DirectoryEntry.Exists(de.Path);
if(exists) {
// yes the objects exists
// do something
} // end if
} // end using
Of course you can omit the exists variable. I used it just to make the statement more clear.
The answer to this question on how to check if Windows user account name exists in domain may be helpful to you.
Are you looking for a specific user, or all users?
I have an application that checks if a user is present by checking the account name - it uses SecurityIdentifier in the System.Security.Principal namespace to check if the Sid is valid.
public bool AccountExists(string name)
{
bool SidExists = false;
try
{
NTAccount Acct = new NTAccount(name);
SecurityIdentifier id = (SecurityIdentifier)Acct.Translate(typeof(SecurityIdentifier));
SidExists = id.IsAccountSid();
}
catch (IdentityNotMappedException)
{
//Oh snap.
}
return SidExists;
}
You can specify the Domain when creating your NTAccount object
NTAccount Acct = new NTAccount("SampleDomain", "SampleName");
EDIT
In reference to your comment, would this work for you? Didnt check it, might have to handle a possible null return before evaulating the IsAccountSid() method...
public SecurityIdentifier AccountSID(string myDomain, string myAcct)
{
SecurityIdentifier id;
try
{
NTAccount Acct = new NTAccount(myDomain, myAcct);
id = (SecurityIdentifier)Acct.Translate(typeof(SecurityIdentifier));
}
catch (IdentityNotMappedException)
{
//Oh snap.
}
return id;
}
SecurityIdentifier AcctSID = AccountSID("ExampleDomain", "ExampleName");
if (AcctSID.IsAccountSid())
//Do Something