Active Directory(LDAP) - 检查帐户被锁定/密码已过期

Question

目前,我使用以下代码针对某些AD对用户进行身份验证:

DirectoryEntry entry = new DirectoryEntry(_path, username, pwd);

try
{
    // Bind to the native AdsObject to force authentication.
    Object obj = entry.NativeObject;

    DirectorySearcher search = new DirectorySearcher(entry) { Filter = "(sAMAccountName=" + username + ")" };
    search.PropertiesToLoad.Add("cn");
    SearchResult result = search.FindOne();
    if (result == null)
    {
        return false;
    }
    // Update the new path to the user in the directory
    _path = result.Path;
    _filterAttribute = (String)result.Properties["cn"][0];
}
catch (Exception ex)
{
    throw new Exception("Error authenticating user. " + ex.Message);
}

这非常适合验证用户名的密码.

问题在于总是返回一般错误"登录失败:未知用户名或密码错误".验证失败时

但是,当帐户被锁定时,身份验证也可能失败.

我怎么知道它是否因为被锁定而失败？

我遇到过你可以使用的文章:

Convert.ToBoolean(entry.InvokeGet("IsAccountLocked"))

或做一些像这里解释的事情

问题是,每当您尝试访问DirectoryEntry上的任何属性时,都会抛出相同的错误.

关于如何找到认证失败的实际原因的任何其他建议？(帐户被锁定/密码已过期/等)

我连接到的AD可能不一定是Windows服务器.

Answer 1

有点晚了,但我会把它扔出去.

如果您真的想确定帐户验证失败的具体原因(除了错误的密码,过期,锁定等等,还有更多原因),您可以使用Windows API LogonUser.不要被它吓倒 - 它比看起来容易.您只需调用LogonUser,如果失败,则查看Marshal.GetLastWin32Error(),它将为您提供返回代码,指示登录失败的(非常)具体原因.

但是,您无法在要进行身份验证的用户的上下文中调用此方法; 您将需要一个priveleged帐户 - 我认为该要求是SE_TCB_NAME(又名SeTcbPrivilege) - 一个有权"作为操作系统的一部分"的用户帐户.

//Your new authenticate code snippet:
        try
        {
            if (!LogonUser(user, domain, pass, LogonTypes.Network, LogonProviders.Default, out token))
            {
                errorCode = Marshal.GetLastWin32Error();
                success = false;
            }
        }
        catch (Exception)
        {
            throw;
        }
        finally
        {
            CloseHandle(token);    
        }            
        success = true;

如果它失败了,你会得到一个返回代码(还有更多你可以查找,但这些是重要的:

 //See http://support.microsoft.com/kb/155012
    const int ERROR_PASSWORD_MUST_CHANGE = 1907;
    const int ERROR_LOGON_FAILURE = 1326;
    const int ERROR_ACCOUNT_RESTRICTION = 1327;
    const int ERROR_ACCOUNT_DISABLED = 1331;
    const int ERROR_INVALID_LOGON_HOURS = 1328;
    const int ERROR_NO_LOGON_SERVERS = 1311;
    const int ERROR_INVALID_WORKSTATION = 1329;
    const int ERROR_ACCOUNT_LOCKED_OUT = 1909;      //It gives this error if the account is locked, REGARDLESS OF WHETHER VALID CREDENTIALS WERE PROVIDED!!!
    const int ERROR_ACCOUNT_EXPIRED = 1793;
    const int ERROR_PASSWORD_EXPIRED = 1330;  

其余的只是复制/粘贴以获取要传入的DLLImports和值

  //here are enums
    enum LogonTypes : uint
        {
            Interactive = 2,
            Network =3,
            Batch = 4,
            Service = 5,
            Unlock = 7,
            NetworkCleartext = 8,
            NewCredentials = 9
        }
        enum LogonProviders : uint
        {
            Default = 0, // default for platform (use this!)
            WinNT35,     // sends smoke signals to authority
            WinNT40,     // uses NTLM
            WinNT50      // negotiates Kerb or NTLM
        }

//Paste these DLLImports

[DllImport("advapi32.dll", SetLastError = true)]
        static extern bool LogonUser(
         string principal,
         string authority,
         string password,
         LogonTypes logonType,
         LogonProviders logonProvider,
         out IntPtr token);

[DllImport("kernel32.dll", SetLastError = true)]
        static extern bool CloseHandle(IntPtr handle);

Answer 2

我知道这个答案已经晚了几年,但我们遇到了与原始海报相同的情况.不幸的是,在我们的环境中,我们无法使用LogonUser - 我们需要一个纯LDAP解决方案.事实证明,有一种方法可以从绑定操作中获取扩展错误代码.这有点难看,但它有效:

catch(DirectoryServicesCOMException exc)
{
    if((uint)exc.ExtendedError == 0x80090308)
    {
        LDAPErrors errCode = 0;

        try
        {
            // Unfortunately, the only place to get the LDAP bind error code is in the "data" field of the 
            // extended error message, which is in this format:
            // 80090308: LdapErr: DSID-0C09030B, comment: AcceptSecurityContext error, data 52e, v893
            if(!string.IsNullOrEmpty(exc.ExtendedErrorMessage))
            {
                Match match = Regex.Match(exc.ExtendedErrorMessage, @" data (?<errCode>[0-9A-Fa-f]+),");
                if(match.Success)
                {
                    string errCodeHex = match.Groups["errCode"].Value;
                    errCode = (LDAPErrors)Convert.ToInt32(errCodeHex, fromBase: 16);
                }
            }
        }
        catch { }

        switch(errCode)
        {
            case LDAPErrors.ERROR_PASSWORD_EXPIRED:
            case LDAPErrors.ERROR_PASSWORD_MUST_CHANGE:
                throw new Exception("Your password has expired and must be changed.");

            // Add any other special error handling here (account disabled, locked out, etc...).
        }
    }

    // If the extended error handling doesn't work out, just throw the original exception.
    throw;
}

并且您需要错误代码的定义(http://www.lifeasbob.com/code/errorcodes.aspx中有更多这些定义):

private enum LDAPErrors
{
    ERROR_INVALID_PASSWORD = 0x56,
    ERROR_PASSWORD_RESTRICTION = 0x52D,
    ERROR_LOGON_FAILURE = 0x52e,
    ERROR_ACCOUNT_RESTRICTION = 0x52f,
    ERROR_INVALID_LOGON_HOURS = 0x530,
    ERROR_INVALID_WORKSTATION = 0x531,
    ERROR_PASSWORD_EXPIRED = 0x532,
    ERROR_ACCOUNT_DISABLED = 0x533,
    ERROR_ACCOUNT_EXPIRED = 0x701,
    ERROR_PASSWORD_MUST_CHANGE = 0x773,
    ERROR_ACCOUNT_LOCKED_OUT = 0x775,
    ERROR_ENTRY_EXISTS = 0x2071,
}

我无法在其他地方找到这些信息 - 每个人都说你应该使用LogonUser.如果有更好的解决方案,我很乐意听到.如果没有,我希望这可以帮助其他无法调用LogonUser的人.