How to convert SID to String in .net

Question

I would like to convert the SID's System.Byte[] type to a String.

My code:

string path = "LDAP://DC=abc,DC=contoso,DC=com"; DirectoryEntry entry = new DirectoryEntry(path); DirectorySearcher mySearcher = new DirectorySearcher(entry);  mySearcher.Filter = "(&(objectClass=user)(samaccountname=user1))"; results = mySearcher.FindAll(); foreach (SearchResult searchResult in results) {     Console.WriteLine(searchResult.Properties["ObjectSID"][0].ToString()); } 

I tried with this but it gets the values from the domain I'm currently logged in, and i need from a given domain.

System.Security.Principal.NTAccount(user1)     .Translate([System.Security.Principal.SecurityIdentifier]).value 

Answer 1

Take a look at the SecurityIdentifier class. You can then do simple things like,

var sidInBytes = (byte[]) *somestuff* var sid = new SecurityIdentifier(sidInBytes, 0); // This gives you what you want sid.ToString(); 

Answer 2

After load the property in directoryEntry ....

var usrId = (byte[])directoryEntry.Properties["objectSid"][0]; var objectID = (new SecurityIdentifier(usrId,0)).ToString();