我正在使用一个使用oracle安全性来验证用户的Silverlight应用程序. (这是业务要求,因此无法更改).
我通过调用WCF Web服务来尝试使用提供的用户名和密码打开与数据库的连接.如果连接失败,我捕获异常并向用户返回一条消息,这是登录代码：
[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));
}
}
如果连接因密码过期而失败,我会向用户显示相应的消息,然后提示他输入旧密码和新密码,然后将新凭据发送到我的网络服务上的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]",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;
}
}
执行更改密码操作后,用户仍然可以使用旧密码连接,并且无法使用新密码进行连接.只有在我重新启动应用程序后,更改才会生效.
我正在使用oracle的ODP.net驱动程序.使用Microsoft的oracle客户端,用户可以在密码更改后连接新密码和旧密码.
preventCache参数仅用于验证没有类型的客户端缓存.我从客户端发送当前日期,然后从Web服务返回相同的值,以查看它是否随后的请求实际更改,并且它按预期执行.
我已经尝试监听连接的InfoMessage事件,看看是否有任何警告,但这样做可以防止密码过期异常上升,代码永远不会到达eventHandler.
我完全迷失了,这种行为对我来说似乎很奇怪,我仍然没有找出问题的根本原因.
我试过在桌面(WPF)应用程序上复制LogIn和ChangePassword方法,它的行为完全相同.所以我想问题不在于Silverlight客户端.
