我正在使用Oracle安全性對用戶進行身份驗證的Silverlight應用程序。 (這是一項業務需求,因此無法更改)。防止使用過期密碼打開ODP.net連接
我這樣做是通過調用WCF Web服務嘗試使用提供的用戶名和密碼打開與數據庫的連接。如果連接失敗,我捕捉到了異常,並返回一個信息給用戶,這裏的登錄代碼:
[OperationContract]
public LoginResult LogIn(string username, string password, DateTime preventCache)
{
var result = new List<string>();
try
{
connectionString = ConfigurationManager.ConnectionStrings["SecurityBD"].ToString();
connectionString = connectionString.Replace("[username]", username);
connectionString = connectionString.Replace("[password]",passowrd)
using (var connection = new Oracle.DataAccess.Client.OracleConnection())
{
connection.ConnectionString = connectionString;
connection.Open();
if (connection.State == System.Data.ConnectionState.Open)
{
connection.Close();
return new LoginResult(true, GetPermisos(username), preventCache);
}
else
{
return new LoginResult(false, null, preventCache);
}
}
}
catch (Oracle.DataAccess.Client.OracleException ex)
{
if (ex.Number == 1017)
{
return new LoginResult(new SecurityError("Wrong credentials.", ErrorType.InvalidCredentials));
}
//Password expired.
if (ex.Number == 28001)
{
return new LoginResult(new SecurityError("Password expired.", ErrorType.PasswordExpired));
}
//Acount is locked.
if (ex.Number == 28000)
{
return new LoginResult(new SecurityError("Account is locked.", ErrorType.AccountLocked));
}
else
{
return new LoginResult(new SecurityError("An error occurred while attempting to connect." + Environment.NewLine + "Error: " + ex.ToString(), ErrorType.UndefinedError));
}
}
catch (Exception exg)
{
return new LoginResult(new SecurityError("An error occurred while attempting to connect." + Environment.NewLine + "Error: " + exg.ToString(), ErrorType.UndefinedError));
}
}
如果連接失敗,因爲一個過期的密碼,我顯示相應的信息給用戶,然後提示他的舊密碼和新密碼,然後將新憑據發送到我的web服務器上的ChangePassword方法。
[OperationContract]
public ChangePasswordResult ChangePassword(string username, string oldPasswrod, string newPassword)
{
string connectionString = string.Empty;
try
{
connectionString = ConfigurationManager.ConnectionStrings["SecurityBD"].ToString();
connectionString = connectionString.Replace("[username]", username);
connectionString = connectionString.Replace("[password]",passowrd)
using (var connection = new OracleConnection(connectionString))
{
connection.Open();
if (connection.State == System.Data.ConnectionState.Open)
{
connection.Close();
using (var newConnection = new Oracle.DataAccess.Client.OracleConnection(connectionString))
{
newConnection.OpenWithNewPassword(Cryptography.TransportDecrypt(newPassword));
if (newConnection.State == System.Data.ConnectionState.Open)
{
return new ChangePasswordResult(null);
}
}
}
return new ChangePasswordResult(new SecurityError("Couldn't connect to the database.", ErrorType.UndefinedError));
}
}
catch (OracleException ex)
{
if (ex.Number == 1017)
{
return new ChangePasswordResult(new SecurityError("Wrong password", ErrorType.InvalidCredentials));
}
//Password expired.
if (ex.Number == 28001)
{
using (var newConnection = new Oracle.DataAccess.Client.OracleConnection(connectionString))
{
try
{
newConnection.OpenWithNewPassword(Cryptography.TransportDecrypt(newPassword));
if (newConnection.State == System.Data.ConnectionState.Open)
{
return new ChangePasswordResult(null);
}
else
{
return new ChangePasswordResult(new SecurityError("No se pudo establecer una conexión con la base de datos", ErrorType.UndefinedError));
}
}
catch (Oracle.DataAccess.Client.OracleException oex)
{
if (oex.Number == 28003)
return new ChangePasswordResult(new SecurityError("You'r new password does not match the security requeriments.." + Environment.NewLine + oex.Message, ErrorType.PasswordNotChanged));
else
return new ChangePasswordResult(new SecurityError(oex.Message, ErrorType.UndefinedError));
}
}
}
//Acount is locked.
if (ex.Number == 28000)
{
return new ChangePasswordResult(new SecurityError("Account is locked.", ErrorType.AccountLocked));
}
else
{
return new ChangePasswordResult(new SecurityError("Couldn't establish a connection." + Environment.NewLine + "Error: " + ex.Message, ErrorType.UndefinedError));
}
}
catch
{
throw;
}
}
當我執行更改密碼操作後,用戶仍然能夠使用舊密碼連接,並且他無法連接新密碼。只有在重新啓動應用程序後,更改纔會生效。
我正在使用oracle的ODP.net驅動程序。使用Microsoft的oracle客戶端,用戶可以在密碼更改後連接新密碼和舊密碼。
preventCache
參數僅用於驗證是否沒有客戶端緩存類型。我從客戶端發送當前日期,然後從Web服務返回相同的值,以查看它是否隨後續請求發生實際更改,並按預期發生。
我試着收聽InfoMessage
事件的連接,看看是否有任何警告,但這樣做可以防止密碼過期異常上升,並且代碼永遠不會到達eventHandler
。
我完全失去了,這種行爲似乎很奇怪,我仍然沒有找到問題的根源。
我試着在桌面(WPF)應用程序上覆制LogIn
和ChangePassword
方法,它的行爲完全一樣。所以我猜這個問題不在Silverlight客戶端中。