活动目录--单点登录程序

基于Active Directory的用户验证 1. 基于AD的用户验证 public static bool IsUserValid (string UserName, string Password) { using (DirectoryEntry deUser = new DirectoryEntry(ADPath, UserName, Password, AuthenticationTypes.Secure)) { try { // The NativeObject call on the DirectoryEntry object entry is an attempt to bind to the object in the directory. // Since this call forces authentication, you will get an error if the user does not exist. // If the user is a valid user in the domain, the call will succeed. Object native = deUser.NativeObject; return true; } catch { return false; } } } 根据UserName/Password验证用户的合法性。需要注意的是：ADSI每次都会尝试Kerberos和NTLM验证，因此系统会记录2次验证记录。在设置Domain Password Policy时，需要考虑到上述的限制。否则，如果Bad Password Count超过限定的Domain Password Policy时，该帐户会Locked out。(注：后面有Article介绍如何判断/如何Lock/Unlock帐户) 2. 验证用户账号Active/Disable /// <summary> /// This will perfrom a logical operation on the userAccountControl values /// to see if the user account is enabled or disabled. The flag for determining if the /// account is active is a bitwise value (decimal =2) /// </summary> /// <param name="userAccountControl"></param> /// <returns></returns> public static bool IsAccountActive(int userAccountControl) { int userAccountControl_Disabled= Convert.ToInt32(ADAccountOptions.UF_ACCOUNTDISABLE); int flagExists = userAccountControl & userAccountControl_Disabled; //if a match is found, then the disabled flag exists within the control flags if(flagExists >0) { return false; } else { return true; } } 3. 示例代码：调用上述IsUserValid()和IsAccountActive()方法 /// <summary> /// This method will not actually log a user in, but will perform tests to ensure /// that the user account exists (matched by both the username and password), and also /// checks if the account is active. /// </summary> /// <param name="UserName"></param> /// <param name="Password"></param> /// <returns></returns> public static ADHelper.LoginResult Login(string UserName, string Password) { //first, check if the logon exists based on the username and password //DirectoryEntry de = GetUser(UserName,Password); if(IsUserValid(UserName,Password)) { DirectoryEntry de = GetUser(UserName); if(de !=null) { //convert the accountControl value so that a logical operation can be performed //to check of the Disabled option exists. int userAccountControl = Convert.ToInt32(de.Properties["userAccountControl"][0]); de.Close(); //if the disabled item does not exist then the account is active if(!IsAccountActive(userAccountControl)) { return LoginResult.LOGIN_USER_ACCOUNT_INACTIVE; } else { return LoginResult.LOGIN_OK; } } else { return LoginResult.LOGIN_USER_DOESNT_EXIST; } } else { return LoginResult.LOGIN_USER_DOESNT_EXIST; } } 4. 相关enum数据类型：ADAccountOptions和LoginResult #region Enumerations public enum ADAccountOptions { UF_TEMP_DUPLICATE_ACCOUNT = 0x0100, UF_NORMAL_ACCOUNT =0x0200, UF_INTERDOMAIN_TRUST_ACCOUNT =0x0800, UF_WORKSTATION_TRUST_ACCOUNT = 0x1000, UF_SERVER_TRUST_ACCOUNT =0x2000, UF_DONT_EXPIRE_PASSWD=0x10000, UF_SCRIPT =0x0001, UF_ACCOUNTDISABLE=0x0002, UF_HOMEDIR_REQUIRED =0x0008, UF_LOCKOUT=0x0010, UF_PASSWD_NOTREQD=0x0020, UF_PASSWD_CANT_CHANGE=0x0040, UF_ACCOUNT_LOCKOUT=0X0010, UF_ENCRYPTED_TEXT_PASSWORD_ALLOWED=0X0080, } public enum LoginResult { LOGIN_OK=0, LOGIN_USER_DOESNT_EXIST, LOGIN_USER_ACCOUNT_INACTIVE } #endregion 具体用户界面User Interface，请参考如下Reference 1 http://www.c-sharpcorner.com/Code/2002/Sept/ADClass.asp