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Medium Trust and 1.2

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jwhitehorn

Post subject: Medium Trust and 1.2

Posted: Wed Mar 07, 2007 11:36 pm

Newbie

Joined: Wed Mar 07, 2007 11:22 pm
Posts: 3

Hello,

I am attempting to get NHibernate to work in a medium trusted environment. I have read over every thread in this forum about getting this to work, but I seem to be missing something. I am using NHibernate version 1.2.0.CR1, and ASP.NET 2.0.

I am getting a ReflectionPermission exception

Request for the permission of type 'System.Security.Permissions.ReflectionPermission, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed.

when I call BuildSessionFactory on Configuration. I have set the lazy load property on the class to false, I am only using public properties, and I have set hibernate.use_reflection_optimizer to false.

Despite all of that, I am still getting the above exception. I have removed just enough code to still reproduce this issue. If anyone could help me resolve this issue, that would be great.

My mapping file

Code:

<?xml version="1.0" encoding="utf-8"?>
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2">
  <class name="GamesLib.BusinessObjects.User, GamesLib" table="Users" lazy="false">
    <id name="UserId" type="Int64">
      <column name="UserId" />
      <generator class="identity" />
    </id>
    <property name="Email" type="String" />
    <property name="Password" type="String" />
  </class>
</hibernate-mapping>

My Class

Quote:

public class User {

public long UserId {
get { return _userId; }
set { _userId = value; }
}

public string Email {
get { return _email; }
set { _email = value; }
}

public string Password {
get { return _password; }
set { _password = value; }
}
//---------------------
private long _userId;
private string _email;
private string _password;
}

and finally,

The code I am using to build my session factory

Quote:

Configuration cfg = new Configuration();
cfg.SetProperty("hibernate.use_reflection_optimizer", "false");
cfg.SetProperty("hibernate.dialect","NHibernate.Dialect.MsSql2000Dialect");
cfg.SetProperty("hibernate.connection.provider","NHibernate.Connection.DriverConnectionProvider");
cfg.SetProperty("hibernate.connection.driver_class","NHibernate.Driver.SqlClientDriver");
cfg.SetProperty("hibernate.connection.connection_string",connectionString);
cfg.AddXmlFile(basePath + "User.hbm.xml");
_sessionFactory = cfg.BuildSessionFactory();

And it is that last line of that last code block that throws the exception.

Thanks

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jwhitehorn

Post subject:

Posted: Thu Mar 08, 2007 1:04 am

Newbie

Joined: Wed Mar 07, 2007 11:22 pm
Posts: 3

Here is just a little more information that I have found out. I allowed the exception to dumb the stack trace to the browser, and here it is...

Quote:

[SecurityException: Request for the permission of type 'System.Security.Permissions.ReflectionPermission, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed.]
System.Security.CodeAccessSecurityEngine.Check(Object demand, StackCrawlMark& stackMark, Boolean isPermSet) +0
System.Security.CodeAccessPermission.Demand() +59
System.Reflection.Emit.DynamicMethod.PerformSecurityCheck(Type owner, StackCrawlMark& stackMark, Boolean skipVisibility) +107
System.Reflection.Emit.DynamicMethod..ctor(String name, Type returnType, Type[] parameterTypes, Type owner, Boolean skipVisibility) +47
NHibernate.Bytecode.Lightweight.ReflectionOptimizer.CreateDynamicMethod(Type returnType, Type[] argumentTypes) +159
NHibernate.Bytecode.Lightweight.ReflectionOptimizer.GenerateGetPropertyValuesMethod(IGetter[] getters) +253
NHibernate.Bytecode.Lightweight.ReflectionOptimizer..ctor(Type mappedType, IGetter[] getters, ISetter[] setters) +127
NHibernate.Bytecode.Lightweight.BytecodeProviderImpl.GetReflectionOptimizer(Type mappedClass, IGetter[] getters, ISetter[] setters) +55
NHibernate.Persister.Entity.AbstractEntityPersister..ctor(PersistentClass persistentClass, ICacheConcurrencyStrategy cache, ISessionFactoryImplementor factory) +6217
NHibernate.Persister.Entity.SingleTableEntityPersister..ctor(PersistentClass model, ICacheConcurrencyStrategy cache, ISessionFactoryImplementor factory, IMapping mapping) +181
NHibernate.Persister.PersisterFactory.CreateClassPersister(PersistentClass model, ICacheConcurrencyStrategy cache, ISessionFactoryImplementor factory, IMapping cfg) +145
NHibernate.Impl.SessionFactoryImpl..ctor(Configuration cfg, IMapping mapping, Settings settings) +1440
NHibernate.Cfg.Configuration.BuildSessionFactory() +111
GamesLib.ServiceLayer.Impl.Simple.SimpleSOImpl..ctor(String connectionString) +301
WebSite.ServiceObject.get_Current() +150
_Default.Page_Load(Object sender, EventArgs e) +72
System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e) +15
System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +34
System.Web.UI.Control.OnLoad(EventArgs e) +99
System.Web.UI.Control.LoadRecursive() +47
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +6953
System.Web.UI.Page.ProcessRequest(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +154
System.Web.UI.Page.ProcessRequest() +86
System.Web.UI.Page.ProcessRequestWithNoAssert(HttpContext context) +18
System.Web.UI.Page.ProcessRequest(HttpContext context) +49
ASP.default_aspx.ProcessRequest(HttpContext context) +46
System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +154
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +64

I am not sure what NHibernate is doing, nor how to fix it... but perhaps that strack trace means something to someone.

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jwhitehorn

Post subject:

Posted: Thu Mar 08, 2007 1:40 am

Newbie

Joined: Wed Mar 07, 2007 11:22 pm
Posts: 3

I think I have found a work around to the problem. Instead of using the SetProperty method of the Configuration object to set my configurations, I have moved them out to my web.config. This seems to have solved my issue.

portion of my web.config

Code:

  <configSections>
    <section name="nhibernate"
             type="System.Configuration.NameValueSectionHandler, System, Version=1.0.5000.0,Culture=neutral, PublicKeyToken=b77a5c561934e089"
             requirePermission="false" />
</configSections>
  <nhibernate>
    <add key="hibernate.connection.provider" value="NHibernate.Connection.DriverConnectionProvider" />
    <add key="hibernate.dialect" value="NHibernate.Dialect.MsSql2000Dialect" />
    <add key="hibernate.connection.driver_class" value="NHibernate.Driver.SqlClientDriver" />
    <add key="hibernate.connection.connection_string" value="server=SID\SQLEXPRESS; User ID=game;Password=password; database=games;Connect Timeout=2000;Application Name=FLUX;"/>
    <add key="hibernate.bytecode.provider" value="null" />
    <!-- Important under Medium Trust -->
  </nhibernate> 

Creating my session factory

Code:

Configuration cfg = new Configuration();
cfg.AddAssembly("GamesLib");
_sessionFactory = cfg.BuildSessionFactory();

I pieced this together from this post: http://forum.hibernate.org/viewtopic.ph ... ight=trust

The only difference I could see between what I was doing, and what that poster was doing was that I was trying to programactically configure NHibernate. So, I attempted to just move that to the web.config and it looks like it works.

Is this perhaps a bug in NHibernate 1.2.0.RC1 that I should post somewhere?

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