├── SharpLdapWhoami.sln ├── SharpLdapWhoami ├── Properties │ └── AssemblyInfo.cs ├── SharpLdapWhoami.csproj └── Program.cs ├── .gitattributes └── .gitignore /SharpLdapWhoami.sln: -------------------------------------------------------------------------------- 1 | 2 | Microsoft Visual Studio Solution File, Format Version 12.00 3 | # Visual Studio Version 16 4 | VisualStudioVersion = 16.0.31624.102 5 | MinimumVisualStudioVersion = 10.0.40219.1 6 | Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "SharpLdapWhoami", "SharpLdapWhoami\SharpLdapWhoami.csproj", "{55E915DB-92B8-406B-90E6-9B5C73C943A5}" 7 | EndProject 8 | Global 9 | GlobalSection(SolutionConfigurationPlatforms) = preSolution 10 | Debug|Any CPU = Debug|Any CPU 11 | Release|Any CPU = Release|Any CPU 12 | EndGlobalSection 13 | GlobalSection(ProjectConfigurationPlatforms) = postSolution 14 | {55E915DB-92B8-406B-90E6-9B5C73C943A5}.Debug|Any CPU.ActiveCfg = Debug|Any CPU 15 | {55E915DB-92B8-406B-90E6-9B5C73C943A5}.Debug|Any CPU.Build.0 = Debug|Any CPU 16 | {55E915DB-92B8-406B-90E6-9B5C73C943A5}.Release|Any CPU.ActiveCfg = Release|Any CPU 17 | {55E915DB-92B8-406B-90E6-9B5C73C943A5}.Release|Any CPU.Build.0 = Release|Any CPU 18 | EndGlobalSection 19 | GlobalSection(SolutionProperties) = preSolution 20 | HideSolutionNode = FALSE 21 | EndGlobalSection 22 | GlobalSection(ExtensibilityGlobals) = postSolution 23 | SolutionGuid = {EB78184F-05A5-4D5F-85DB-05B7E0C07D01} 24 | EndGlobalSection 25 | EndGlobal 26 | -------------------------------------------------------------------------------- /SharpLdapWhoami/Properties/AssemblyInfo.cs: -------------------------------------------------------------------------------- 1 | using System.Reflection; 2 | using System.Runtime.CompilerServices; 3 | using System.Runtime.InteropServices; 4 | 5 | // General Information about an assembly is controlled through the following 6 | // set of attributes. Change these attribute values to modify the information 7 | // associated with an assembly. 8 | [assembly: AssemblyTitle("SharpLdapWhoami")] 9 | [assembly: AssemblyDescription("")] 10 | [assembly: AssemblyConfiguration("")] 11 | [assembly: AssemblyCompany("")] 12 | [assembly: AssemblyProduct("SharpLdapWhoami")] 13 | [assembly: AssemblyCopyright("Copyright © 2022")] 14 | [assembly: AssemblyTrademark("")] 15 | [assembly: AssemblyCulture("")] 16 | 17 | // Setting ComVisible to false makes the types in this assembly not visible 18 | // to COM components. If you need to access a type in this assembly from 19 | // COM, set the ComVisible attribute to true on that type. 20 | [assembly: ComVisible(false)] 21 | 22 | // The following GUID is for the ID of the typelib if this project is exposed to COM 23 | [assembly: Guid("55e915db-92b8-406b-90e6-9b5c73c943a5")] 24 | 25 | // Version information for an assembly consists of the following four values: 26 | // 27 | // Major Version 28 | // Minor Version 29 | // Build Number 30 | // Revision 31 | // 32 | // You can specify all the values or you can default the Build and Revision Numbers 33 | // by using the '*' as shown below: 34 | // [assembly: AssemblyVersion("1.0.*")] 35 | [assembly: AssemblyVersion("1.0.0.0")] 36 | [assembly: AssemblyFileVersion("1.0.0.0")] 37 | -------------------------------------------------------------------------------- /SharpLdapWhoami/SharpLdapWhoami.csproj: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | Debug 6 | AnyCPU 7 | {55E915DB-92B8-406B-90E6-9B5C73C943A5} 8 | Exe 9 | SharpLdapWhoami 10 | SharpLdapWhoami 11 | v4.0 12 | 512 13 | true 14 | 15 | 16 | AnyCPU 17 | true 18 | full 19 | false 20 | bin\Debug\ 21 | DEBUG;TRACE 22 | prompt 23 | 4 24 | 25 | 26 | AnyCPU 27 | pdbonly 28 | true 29 | bin\Release\ 30 | TRACE 31 | prompt 32 | 4 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 43 | 44 | 45 | 46 | 47 | 48 | 49 | 50 | -------------------------------------------------------------------------------- /.gitattributes: -------------------------------------------------------------------------------- 1 | ############################################################################### 2 | # Set default behavior to automatically normalize line endings. 3 | ############################################################################### 4 | * text=auto 5 | 6 | ############################################################################### 7 | # Set default behavior for command prompt diff. 8 | # 9 | # This is need for earlier builds of msysgit that does not have it on by 10 | # default for csharp files. 11 | # Note: This is only used by command line 12 | ############################################################################### 13 | #*.cs diff=csharp 14 | 15 | ############################################################################### 16 | # Set the merge driver for project and solution files 17 | # 18 | # Merging from the command prompt will add diff markers to the files if there 19 | # are conflicts (Merging from VS is not affected by the settings below, in VS 20 | # the diff markers are never inserted). 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2 | using System.Collections.Generic; 3 | using System.Text; 4 | using System.DirectoryServices.Protocols; 5 | using System.DirectoryServices.ActiveDirectory; 6 | using System.Security.Principal; 7 | 8 | /* 9 | * Written by Jonas Vestberg (@bugch3ck) 10 | * Stolen from https://github.com/leechristensen/Random/blob/master/PowerShellScripts/Get-LdapCurrentUser.ps1 11 | */ 12 | namespace SharpLdapWhoami 13 | { 14 | public struct Arguments 15 | { 16 | public enum AuthMethodEnum // Values in sync with System.DirectoryServices.Protocols.AuthType 17 | { 18 | Ntlm = 3, 19 | Nego = 2, 20 | Negotiate = 2, 21 | Kerb = 9, 22 | Kerberos = 9 23 | }; 24 | 25 | public bool Valid { get; set; } 26 | public bool Verbose { get; set; } 27 | public bool Group { get; set; } 28 | public bool User { get; set; } 29 | public string Server { get; set; } 30 | public AuthMethodEnum AuthMethod { get; set; } 31 | 32 | } 33 | 34 | struct PrincipalInfo 35 | { 36 | public PrincipalInfo(string dn, string name, string sid) 37 | { 38 | DN = dn; 39 | Name = name; 40 | Sid = sid; 41 | } 42 | public string DN { get; set; } 43 | public string Name { get; set; } 44 | public string Sid { get; set; } 45 | 46 | public PrincipalInfo(SearchResultEntry entry) 47 | { 48 | DN = entry.Attributes["distinguishedName"][0].ToString(); 49 | Name = entry.Attributes["sAMAccountName"][0].ToString(); 50 | if (entry.Attributes["objectSid"][0].GetType() == typeof(System.Byte[])) 51 | { 52 | Sid = new SecurityIdentifier((byte[])entry.Attributes["objectSid"][0], 0).ToString(); 53 | } 54 | else 55 | { 56 | // Strange case when objectSig contains a string with the SID bytes instead of a byte array. 57 | Sid = new SecurityIdentifier(Encoding.ASCII.GetBytes((string)entry.Attributes["objectSid"][0]), 0).ToString(); 58 | } 59 | } 60 | } 61 | 62 | class Program 63 | { 64 | 65 | static private void PrintHelp() 66 | { 67 | Console.WriteLine( 68 | @" 69 | 70 | SharpLdapWhoami by @bugch3ck. 71 | 72 | WhoAmI by asking the LDAP service on a domain controller. 73 | Original idea from Lee Christensen's Get-LdapCurrentUser.ps1 74 | 75 | Usage: 76 | 77 | SharpLdapWhoami [/all] [/user] [/groups] [/v] [/server:] [/h | /?] 78 | 79 | Options: 80 | 81 | /u /user - Show detailed user information. 82 | /g /groups - Show group information (primary group, member of and recursive group membership). 83 | /a /all - /user and /group combined. 84 | /v /verbose - Show verbose output. 85 | /h /help /? - Show this help. 86 | /s /server: - The LDAP server to use (defaults to autoselect in user and computer context). 87 | /m /method: - The authentication method to use against the LDAP server. 88 | ntlm NTLM 89 | kerb, kerberos Kerberos 90 | nego, negotiate Negotiate 91 | 92 | Examples: 93 | 94 | SharpLdapWhoami 95 | SharpLdapWhoami /method:ntlm 96 | SharpLdapWhoami /method:kerb 97 | SharpLdapWhoami /all /server:dc01.e-corp.local 98 | SharpLdapWhoami /u /s:10.10.10.1:636 /m:nego 99 | 100 | 101 | Credits to 102 | 103 | "); 104 | } 105 | 106 | static private Arguments ParseArgs(string[] args) 107 | { 108 | Arguments parsedArgs = new Arguments() { 109 | Valid = true, 110 | AuthMethod=Arguments.AuthMethodEnum.Negotiate 111 | }; 112 | 113 | foreach (string arg in args) 114 | { 115 | string[] x = arg.Split(new char[] { ':' }, 2); 116 | string opt = x[0]; 117 | string val = (x.Length > 1) ? x[1] : null; 118 | switch (opt) 119 | { 120 | case "/v": 121 | case "/verbose": 122 | parsedArgs.Verbose = true; 123 | break; 124 | case "/u": 125 | case "/user": 126 | parsedArgs.User = true; 127 | break; 128 | case "/g": 129 | case "/groups": 130 | parsedArgs.Group = true; 131 | break; 132 | case "/a": 133 | case "/all": 134 | parsedArgs.User = true; 135 | parsedArgs.Group = true; 136 | break; 137 | case "/s": 138 | case "/server": 139 | parsedArgs.Server = val; 140 | break; 141 | case "/m": 142 | case "/method": 143 | try 144 | { 145 | parsedArgs.AuthMethod = (Arguments.AuthMethodEnum) System.Enum.Parse(typeof(Arguments.AuthMethodEnum), val, true); 146 | 147 | } catch (Exception) 148 | { 149 | Console.Error.WriteLine($"Error: Unknown authentication method {val}"); 150 | parsedArgs.Valid = false; 151 | } 152 | 153 | break; 154 | default: 155 | parsedArgs.Valid = false; 156 | break; 157 | } 158 | } 159 | 160 | return parsedArgs; 161 | } 162 | 163 | static private void OutputResultTable(string title, string[] headings, PrincipalInfo entry) 164 | { 165 | Dictionary list = new Dictionary(); 166 | list.Add(entry.DN, entry); 167 | OutputResultTable(title, headings, list); 168 | } 169 | 170 | static private void OutputResultTable(string title, string[] headings, Dictionary list) 171 | { 172 | Console.WriteLine(); 173 | Console.WriteLine(title.ToUpper()); 174 | Console.WriteLine(new String('-', title.Length)); 175 | Console.WriteLine(); 176 | 177 | int[] maxWidth = new int[] { 178 | headings[0].Length, 179 | headings[1].Length, 180 | headings[2].Length 181 | }; 182 | 183 | foreach (PrincipalInfo entry in list.Values) 184 | { 185 | maxWidth[0] = (entry.Name.Length > maxWidth[0]) ? entry.Name.Length : maxWidth[0]; 186 | maxWidth[1] = (entry.Sid.Length > maxWidth[1]) ? entry.Sid.Length : maxWidth[1]; 187 | maxWidth[2] = (entry.DN.Length > maxWidth[2]) ? entry.DN.Length : maxWidth[2]; 188 | } 189 | Console.WriteLine( 190 | String.Format("{0} {1} {2}", 191 | headings[0].PadRight(maxWidth[0]), 192 | headings[1].PadRight(maxWidth[1]), 193 | headings[2].PadRight(maxWidth[2]) 194 | ) 195 | ); 196 | Console.WriteLine( 197 | String.Format("{0} {1} {2}", 198 | "".PadRight(maxWidth[0], '='), 199 | "".PadRight(maxWidth[1], '='), 200 | "".PadRight(maxWidth[2], '=') 201 | ) 202 | ); 203 | foreach (PrincipalInfo entry in list.Values) 204 | { 205 | Console.WriteLine( 206 | String.Format("{0} {1} {2}", 207 | entry.Name.PadRight(maxWidth[0]), 208 | entry.Sid.PadRight(maxWidth[1]), 209 | entry.DN.PadRight(maxWidth[2]) 210 | ) 211 | ); 212 | } 213 | 214 | Console.WriteLine(); 215 | } 216 | 217 | static private void OutputVerbose(string s, bool isError = false) 218 | { 219 | if (ParsedArgs.Verbose == false) return; 220 | 221 | if (isError) 222 | { 223 | Console.Error.WriteLine($"[-] {s}"); 224 | } 225 | else 226 | { 227 | Console.WriteLine($"[*] {s}"); 228 | } 229 | } 230 | 231 | private static void AddGroupsInGroups(Dictionarygroups, LdapConnection c, SearchRequest searchRequest) 232 | { 233 | // Get group information 234 | SearchResponse searchResponse = (SearchResponse)c.SendRequest(searchRequest); 235 | 236 | for (int i = 0; i < searchResponse.Entries.Count; i++) 237 | { 238 | PrincipalInfo groupInfo = new PrincipalInfo(searchResponse.Entries[i]); 239 | if (groups.ContainsKey(groupInfo.DN) == false) 240 | { 241 | groups.Add(groupInfo.DN, groupInfo); 242 | 243 | // Query groups that this group is a member of. 244 | SearchRequest searchRequest2 = new SearchRequest 245 | ( 246 | searchRequest.DistinguishedName, 247 | $"(&(objectClass=group)(member={groupInfo.DN}))", 248 | System.DirectoryServices.Protocols.SearchScope.Subtree, 249 | new string[] { "sAMAccountName", "objectSid", "distinguishedName" } 250 | ); 251 | AddGroupsInGroups(groups, c, searchRequest2); 252 | } 253 | } 254 | 255 | 256 | } 257 | 258 | public static Arguments ParsedArgs; 259 | 260 | static int Main(string[] args) 261 | { 262 | ParsedArgs = ParseArgs(args); 263 | Dictionary groups = new Dictionary(); 264 | 265 | if (ParsedArgs.Valid == false) 266 | { 267 | PrintHelp(); 268 | return -1; 269 | } 270 | 271 | string server = ParsedArgs.Server; 272 | if (server == null) 273 | { 274 | OutputVerbose("No server argument. Using current context to find domain controller."); 275 | try 276 | { 277 | OutputVerbose("Looking up domain controller for current user."); 278 | Domain domain = Domain.GetCurrentDomain(); 279 | server = domain.FindDomainController().Name; 280 | } 281 | catch (Exception) 282 | { 283 | OutputVerbose("Cannot retrieve domain controller for current user.", true); 284 | } 285 | if (server == null) 286 | { 287 | try 288 | { 289 | OutputVerbose("Looking up domain controller for computer."); 290 | Domain domain = Domain.GetComputerDomain(); 291 | server = domain.FindDomainController().Name; 292 | } 293 | catch (Exception) 294 | { 295 | OutputVerbose("Cannot retrieve domain controller for computer.", true); 296 | } 297 | if (server == null) 298 | { 299 | Console.Error.WriteLine("Error: No ldap server specified and could not find a domain controller in user or computer context. Quitting"); 300 | return -2; 301 | } 302 | } 303 | } 304 | 305 | LdapConnection c; 306 | c = new LdapConnection(server); // Defaults to AuthType.Negotiate 307 | c.AuthType = (System.DirectoryServices.Protocols.AuthType)ParsedArgs.AuthMethod; 308 | string response; 309 | 310 | try 311 | { 312 | ExtendedRequest extreq = new ExtendedRequest("1.3.6.1.4.1.4203.1.11.3"); 313 | ExtendedResponse extres = (ExtendedResponse) c.SendRequest(extreq); 314 | response = Encoding.ASCII.GetString(extres.ResponseValue); 315 | } 316 | catch (Exception e) 317 | { 318 | Console.Error.WriteLine($"Error: Cannot connect to LDAP server ({e.Message})"); 319 | return -10; 320 | } 321 | 322 | if (response == null) 323 | { 324 | Console.Error.WriteLine("Error: Failed to request current user from LDAP."); 325 | } 326 | else if (response.StartsWith("u:") == false) 327 | { 328 | Console.Error.WriteLine($"Error: Unexpected username format from LDAP ({response})."); 329 | return -1; 330 | } 331 | int i1 = response.IndexOf(':'); 332 | int i2 = response.IndexOf('\\',i1+1); 333 | string userDomain = response.Substring(i1+1,i2-(i1+1)).ToLower(); // Conform with built in WHOAMI.exe 334 | string userName = response.Substring(i2+1); 335 | 336 | SearchRequest searchRequest; 337 | SearchResponse searchResponse; 338 | 339 | // Get domain DN to use as base in searches. 340 | searchRequest = new SearchRequest 341 | ( 342 | "", 343 | "(objectClass=*)", 344 | System.DirectoryServices.Protocols.SearchScope.Base, 345 | new string[] { "DefaultNamingContext" } 346 | ); 347 | 348 | searchResponse = (SearchResponse) c.SendRequest(searchRequest); 349 | string baseDN = searchResponse .Entries[0].Attributes["DefaultNamingContext"][0].ToString(); 350 | 351 | // Get user attributes 352 | searchRequest = new SearchRequest 353 | ( 354 | baseDN, 355 | $"(&(objectClass=user)(sAMAccountName={userName}))", 356 | System.DirectoryServices.Protocols.SearchScope.Subtree, 357 | new string[] { "objectSid", "primaryGroupID", "distinguishedName" } 358 | ); 359 | searchResponse = (SearchResponse)c.SendRequest(searchRequest); 360 | 361 | SecurityIdentifier userSid = new SecurityIdentifier( (byte[])searchResponse.Entries[0].Attributes["objectSid"][0], 0); 362 | string userDN = searchResponse.Entries[0].Attributes["distinguishedName"][0].ToString(); 363 | string userDomainSid = userSid.AccountDomainSid.ToString(); 364 | string userPrimaryGroupID = searchResponse.Entries[0].Attributes["primaryGroupID"][0].ToString(); 365 | 366 | if ((ParsedArgs.User == false) && (ParsedArgs.Group == false)) 367 | { 368 | Console.WriteLine($"{userDomain}\\{userName}"); 369 | } 370 | else if (ParsedArgs.User) 371 | { 372 | OutputResultTable("User information", new string[] { "User Name", "SID", "Distinguished Name" }, new PrincipalInfo(userDN, userName, userSid.ToString())); 373 | } 374 | 375 | // Get primary group information 376 | searchRequest = new SearchRequest 377 | ( 378 | baseDN, 379 | $"(&(objectClass=group)(objectSid={userDomainSid}-{userPrimaryGroupID}))", 380 | System.DirectoryServices.Protocols.SearchScope.Subtree, 381 | new string[] { "sAMAccountName", "objectSid", "distinguishedName" } 382 | ); 383 | searchResponse = (SearchResponse)c.SendRequest(searchRequest); 384 | 385 | PrincipalInfo primaryGroupInfo = new PrincipalInfo(searchResponse.Entries[0]); 386 | 387 | groups.Add(primaryGroupInfo.DN, primaryGroupInfo); 388 | 389 | if (ParsedArgs.Group) 390 | { 391 | // Get group information 392 | searchRequest = new SearchRequest 393 | ( 394 | baseDN, 395 | $"(&(objectClass=group)(member={userDN}))", 396 | System.DirectoryServices.Protocols.SearchScope.Subtree, 397 | new string[] { "sAMAccountName", "objectSid", "distinguishedName" } 398 | ); 399 | AddGroupsInGroups(groups, c, searchRequest); 400 | 401 | OutputResultTable("Group information", new string[] { "Group Name", "SID", "Distinguished Name" }, groups); 402 | } 403 | return 0; 404 | } 405 | } 406 | } 407 | --------------------------------------------------------------------------------