Użycie AD do uwierzytelnienia to świetny pomysł, ponieważ trzeba dodać wszystkich tak i na zewnątrz użytkownicy sieci nie potrzebują dodatkowego logowania.
Masz rację, że program ASP.NET umożliwia korzystanie z dostawcy, który pozwoli Ci uwierzytelnić się w AD, chociaż nie ma nic, co dałoby ci wsparcie przy członkostwie w grupach (chociaż jest to dość trywialne wdrożenie, jeśli chcesz, ja może dostarczyć próbkę).
Prawdziwym problemem jest tutaj, jeśli chcesz używać grup AD do definiowania uprawnień w każdej aplikacji, tak?
Jeśli tak, to masz możliwość utworzenia własnego RoleProvider dla ASP.NET, który może być również używany przez aplikacje WinForm i WPF za pośrednictwem ApplicationServices.Ten RoleProvider może łączyć ID użytkownika w AD z grupami/rolami na aplikację, które możesz przechowywać w swojej własnej niestandardowej bazie danych, co pozwala każdej aplikacji na administrowanie tymi rolami bez konieczności posiadania przez te administratorów dodatkowych uprawnień w AD.
Jeśli chcesz, możesz także zastąpić i połączyć role aplikacji z grupami AD, więc jeśli są w jakiejś globalnej grupie administracyjnej w AD, uzyskują pełne pozwolenie w aplikacji niezależnie od przynależności do roli aplikacji. I odwrotnie, jeśli mają grupę lub obiekt w AD, aby powiedzieć, że zostali zwolnieni, możesz zignorować wszystkie przynależności do roli aplikacji i ograniczyć dostęp (ponieważ HR prawdopodobnie nie usunąłby ich z każdej aplikacji, zakładając, że nawet o nich wiedzą wszystko!).
Przykładowy kod dodawany jako wniosek:
UWAGA: na podstawie tego oryginalnego dzieła http://www.codeproject.com/Articles/28546/Active-Directory-Roles-Provider
Dla Twojej ActiveDirectoryMembershipProvider tylko trzeba wdrożyć metodę ValidateUser, chociaż można wdrożyć bardziej jeśli jest to pożądane, Nowa przestrzeń nazw AccountManagement czyni to trywialnie:
// assumes: using System.DirectoryServices.AccountManagement;
public override bool ValidateUser(string username, string password)
{
bool result = false;
try
{
using(var context =
new PrincipalContext(ContextType.Domain, "yourDomainName"))
{
result = context.ValidateCredentials(username, password);
}
}
catch(Exception ex)
{
// TODO: log exception
}
return result;
}
Dla twojego dostawcy roli to trochę więcej pracy, jest kilka kluczowych problemów, które znaleźliśmy podczas wyszukiwania w Google, takich jak grupy, które chcesz wykluczyć, użytkowników, których chcesz wykluczyć itp.
Jest to prawdopodobnie warte pełnego wpisu na blogu, ale powinno to pomóc Ci zacząć, to wyszukiwanie w pamięci podręcznej w zmiennych sesji, tak jak próbka, w jaki sposób można poprawić wydajność (ponieważ pełna próbka pamięci podręcznej byłaby zbyt długa).
using System;
using System.Collections.Generic;
using System.Collections.Specialized;
using System.Configuration.Provider;
using System.Diagnostics;
using System.DirectoryServices;
using System.DirectoryServices.AccountManagement;
using System.Linq;
using System.Web;
using System.Web.Hosting;
using System.Web.Security;
namespace MyApp.Security
{
public sealed class ActiveDirectoryRoleProvider : RoleProvider
{
private const string AD_FILTER = "(&(objectCategory=group)(|(groupType=-2147483646)(groupType=-2147483644)(groupType=-2147483640)))";
private const string AD_FIELD = "samAccountName";
private string _activeDirectoryConnectionString;
private string _domain;
// Retrieve Group Mode
// "Additive" indicates that only the groups specified in groupsToUse will be used
// "Subtractive" indicates that all Active Directory groups will be used except those specified in groupsToIgnore
// "Additive" is somewhat more secure, but requires more maintenance when groups change
private bool _isAdditiveGroupMode;
private List<string> _groupsToUse;
private List<string> _groupsToIgnore;
private List<string> _usersToIgnore;
#region Ignore Lists
// IMPORTANT - DEFAULT LIST OF ACTIVE DIRECTORY USERS TO "IGNORE"
// DO NOT REMOVE ANY OF THESE UNLESS YOU FULLY UNDERSTAND THE SECURITY IMPLICATIONS
// VERYIFY THAT ALL CRITICAL USERS ARE IGNORED DURING TESTING
private String[] _DefaultUsersToIgnore = new String[]
{
"Administrator", "TsInternetUser", "Guest", "krbtgt", "Replicate", "SERVICE", "SMSService"
};
// IMPORTANT - DEFAULT LIST OF ACTIVE DIRECTORY DOMAIN GROUPS TO "IGNORE"
// PREVENTS ENUMERATION OF CRITICAL DOMAIN GROUP MEMBERSHIP
// DO NOT REMOVE ANY OF THESE UNLESS YOU FULLY UNDERSTAND THE SECURITY IMPLICATIONS
// VERIFY THAT ALL CRITICAL GROUPS ARE IGNORED DURING TESTING BY CALLING GetAllRoles MANUALLY
private String[] _defaultGroupsToIgnore = new String[]
{
"Domain Guests", "Domain Computers", "Group Policy Creator Owners", "Guests", "Users",
"Domain Users", "Pre-Windows 2000 Compatible Access", "Exchange Domain Servers", "Schema Admins",
"Enterprise Admins", "Domain Admins", "Cert Publishers", "Backup Operators", "Account Operators",
"Server Operators", "Print Operators", "Replicator", "Domain Controllers", "WINS Users",
"DnsAdmins", "DnsUpdateProxy", "DHCP Users", "DHCP Administrators", "Exchange Services",
"Exchange Enterprise Servers", "Remote Desktop Users", "Network Configuration Operators",
"Incoming Forest Trust Builders", "Performance Monitor Users", "Performance Log Users",
"Windows Authorization Access Group", "Terminal Server License Servers", "Distributed COM Users",
"Administrators", "Everybody", "RAS and IAS Servers", "MTS Trusted Impersonators",
"MTS Impersonators", "Everyone", "LOCAL", "Authenticated Users"
};
#endregion
/// <summary>
/// Initializes a new instance of the ADRoleProvider class.
/// </summary>
public ActiveDirectoryRoleProvider()
{
_groupsToUse = new List<string>();
_groupsToIgnore = new List<string>();
_usersToIgnore = new List<string>();
}
public override String ApplicationName { get; set; }
/// <summary>
/// Initialize ADRoleProvider with config values
/// </summary>
/// <param name="name"></param>
/// <param name="config"></param>
public override void Initialize(String name, NameValueCollection config)
{
if (config == null)
throw new ArgumentNullException("config");
if (String.IsNullOrEmpty(name))
name = "ADRoleProvider";
if (String.IsNullOrEmpty(config[ "description" ]))
{
config.Remove("description");
config.Add("description", "Active Directory Role Provider");
}
// Initialize the abstract base class.
base.Initialize(name, config);
_domain = ReadConfig(config, "domain");
_isAdditiveGroupMode = (ReadConfig(config, "groupMode") == "Additive");
_activeDirectoryConnectionString = ReadConfig(config, "connectionString");
DetermineApplicationName(config);
PopulateLists(config);
}
private string ReadConfig(NameValueCollection config, string key)
{
if (config.AllKeys.Any(k => k == key))
return config[ key ];
throw new ProviderException("Configuration value required for key: " + key);
}
private void DetermineApplicationName(NameValueCollection config)
{
// Retrieve Application Name
ApplicationName = config[ "applicationName" ];
if (String.IsNullOrEmpty(ApplicationName))
{
try
{
string app =
HostingEnvironment.ApplicationVirtualPath ??
Process.GetCurrentProcess().MainModule.ModuleName.Split('.').FirstOrDefault();
ApplicationName = app != "" ? app : "/";
}
catch
{
ApplicationName = "/";
}
}
if (ApplicationName.Length > 256)
throw new ProviderException("The application name is too long.");
}
private void PopulateLists(NameValueCollection config)
{
// If Additive group mode, populate GroupsToUse with specified AD groups
if (_isAdditiveGroupMode && !String.IsNullOrEmpty(config[ "groupsToUse" ]))
_groupsToUse.AddRange(
config[ "groupsToUse" ].Split(',').Select(group => group.Trim())
);
// Populate GroupsToIgnore List<string> with AD groups that should be ignored for roles purposes
_groupsToIgnore.AddRange(
_defaultGroupsToIgnore.Select(group => group.Trim())
);
_groupsToIgnore.AddRange(
(config[ "groupsToIgnore" ] ?? "").Split(',').Select(group => group.Trim())
);
// Populate UsersToIgnore ArrayList with AD users that should be ignored for roles purposes
string usersToIgnore = config[ "usersToIgnore" ] ?? "";
_usersToIgnore.AddRange(
_DefaultUsersToIgnore
.Select(value => value.Trim())
.Union(
usersToIgnore
.Split(new[] { "," }, StringSplitOptions.RemoveEmptyEntries)
.Select(value => value.Trim())
)
);
}
private void RecurseGroup(PrincipalContext context, string group, List<string> groups)
{
var principal = GroupPrincipal.FindByIdentity(context, IdentityType.SamAccountName, group);
if (principal == null)
return;
List<string> res =
principal
.GetGroups()
.ToList()
.Select(grp => grp.Name)
.ToList();
groups.AddRange(res.Except(groups));
foreach (var item in res)
RecurseGroup(context, item, groups);
}
/// <summary>
/// Retrieve listing of all roles to which a specified user belongs.
/// </summary>
/// <param name="username"></param>
/// <returns>String array of roles</returns>
public override string[] GetRolesForUser(string username)
{
string sessionKey = "groupsForUser:" + username;
if (HttpContext.Current != null &&
HttpContext.Current.Session != null &&
HttpContext.Current.Session[ sessionKey ] != null
)
return ((List<string>) (HttpContext.Current.Session[ sessionKey ])).ToArray();
using (PrincipalContext context = new PrincipalContext(ContextType.Domain, _domain))
{
try
{
// add the users groups to the result
var groupList =
UserPrincipal
.FindByIdentity(context, IdentityType.SamAccountName, username)
.GetGroups()
.Select(group => group.Name)
.ToList();
// add each groups sub groups into the groupList
foreach (var group in new List<string>(groupList))
RecurseGroup(context, group, groupList);
groupList = groupList.Except(_groupsToIgnore).ToList();
if (_isAdditiveGroupMode)
groupList = groupList.Join(_groupsToUse, r => r, g => g, (r, g) => r).ToList();
if (HttpContext.Current != null)
HttpContext.Current.Session[ sessionKey ] = groupList;
return groupList.ToArray();
}
catch (Exception ex)
{
// TODO: LogError("Unable to query Active Directory.", ex);
return new[] { "" };
}
}
}
/// <summary>
/// Retrieve listing of all users in a specified role.
/// </summary>
/// <param name="rolename">String array of users</param>
/// <returns></returns>
public override string[] GetUsersInRole(String rolename)
{
if (!RoleExists(rolename))
throw new ProviderException(String.Format("The role '{0}' was not found.", rolename));
using (PrincipalContext context = new PrincipalContext(ContextType.Domain, _domain))
{
try
{
GroupPrincipal p = GroupPrincipal.FindByIdentity(context, IdentityType.SamAccountName, rolename);
return (
from user in p.GetMembers(true)
where !_usersToIgnore.Contains(user.SamAccountName)
select user.SamAccountName
).ToArray();
}
catch (Exception ex)
{
// TODO: LogError("Unable to query Active Directory.", ex);
return new[] { "" };
}
}
}
/// <summary>
/// Determine if a specified user is in a specified role.
/// </summary>
/// <param name="username"></param>
/// <param name="rolename"></param>
/// <returns>Boolean indicating membership</returns>
public override bool IsUserInRole(string username, string rolename)
{
return GetUsersInRole(rolename).Any(user => user == username);
}
/// <summary>
/// Retrieve listing of all roles.
/// </summary>
/// <returns>String array of roles</returns>
public override string[] GetAllRoles()
{
string[] roles = ADSearch(_activeDirectoryConnectionString, AD_FILTER, AD_FIELD);
return (
from role in roles.Except(_groupsToIgnore)
where !_isAdditiveGroupMode || _groupsToUse.Contains(role)
select role
).ToArray();
}
/// <summary>
/// Determine if given role exists
/// </summary>
/// <param name="rolename">Role to check</param>
/// <returns>Boolean indicating existence of role</returns>
public override bool RoleExists(string rolename)
{
return GetAllRoles().Any(role => role == rolename);
}
/// <summary>
/// Return sorted list of usernames like usernameToMatch in rolename
/// </summary>
/// <param name="rolename">Role to check</param>
/// <param name="usernameToMatch">Partial username to check</param>
/// <returns></returns>
public override string[] FindUsersInRole(string rolename, string usernameToMatch)
{
if (!RoleExists(rolename))
throw new ProviderException(String.Format("The role '{0}' was not found.", rolename));
return (
from user in GetUsersInRole(rolename)
where user.ToLower().Contains(usernameToMatch.ToLower())
select user
).ToArray();
}
#region Non Supported Base Class Functions
/// <summary>
/// AddUsersToRoles not supported. For security and management purposes, ADRoleProvider only supports read operations against Active Direcory.
/// </summary>
public override void AddUsersToRoles(string[] usernames, string[] rolenames)
{
throw new NotSupportedException("Unable to add users to roles. For security and management purposes, ADRoleProvider only supports read operations against Active Direcory.");
}
/// <summary>
/// CreateRole not supported. For security and management purposes, ADRoleProvider only supports read operations against Active Direcory.
/// </summary>
public override void CreateRole(string rolename)
{
throw new NotSupportedException("Unable to create new role. For security and management purposes, ADRoleProvider only supports read operations against Active Direcory.");
}
/// <summary>
/// DeleteRole not supported. For security and management purposes, ADRoleProvider only supports read operations against Active Direcory.
/// </summary>
public override bool DeleteRole(string rolename, bool throwOnPopulatedRole)
{
throw new NotSupportedException("Unable to delete role. For security and management purposes, ADRoleProvider only supports read operations against Active Direcory.");
}
/// <summary>
/// RemoveUsersFromRoles not supported. For security and management purposes, ADRoleProvider only supports read operations against Active Direcory.
/// </summary>
public override void RemoveUsersFromRoles(string[] usernames, string[] rolenames)
{
throw new NotSupportedException("Unable to remove users from roles. For security and management purposes, ADRoleProvider only supports read operations against Active Direcory.");
}
#endregion
/// <summary>
/// Performs an extremely constrained query against Active Directory. Requests only a single value from
/// AD based upon the filtering parameter to minimize performance hit from large queries.
/// </summary>
/// <param name="ConnectionString">Active Directory Connection String</param>
/// <param name="filter">LDAP format search filter</param>
/// <param name="field">AD field to return</param>
/// <returns>String array containing values specified by 'field' parameter</returns>
private String[] ADSearch(String ConnectionString, String filter, String field)
{
DirectorySearcher searcher = new DirectorySearcher
{
SearchRoot = new DirectoryEntry(ConnectionString),
Filter = filter,
PageSize = 500
};
searcher.PropertiesToLoad.Clear();
searcher.PropertiesToLoad.Add(field);
try
{
using (SearchResultCollection results = searcher.FindAll())
{
List<string> r = new List<string>();
foreach (SearchResult searchResult in results)
{
var prop = searchResult.Properties[ field ];
for (int index = 0; index < prop.Count; index++)
r.Add(prop[ index ].ToString());
}
return r.Count > 0 ? r.ToArray() : new string[ 0 ];
}
}
catch (Exception ex)
{
throw new ProviderException("Unable to query Active Directory.", ex);
}
}
}
}
Przykładowy config wpis podrozdział o tym będzie w następujący sposób:
<roleManager enabled="true" defaultProvider="ActiveDirectory">
<providers>
<clear/>
<add
applicationName="MyApp" name="ActiveDirectory"
type="MyApp.Security.ActiveDirectoryRoleProvider"
domain="mydomain" groupMode="" connectionString="LDAP://myDirectoryServer.local/dc=mydomain,dc=local"
/>
</providers>
</roleManager>
Uff, to dużo kodu!
PS: Podstawowe części powyższego dostawcy ról opierają się na pracy innej osoby, nie mam linku pod ręką, ale znaleźliśmy go przez Google, więc częściowy kredyt dla tej osoby dla oryginału. Zmodyfikowaliśmy go mocno, aby użyć LINQ i pozbyć się potrzeby bazy danych do buforowania.
Dodałem przykładowy kod, zgodnie z żądaniem –