Question

Under Medium trust, is it possible to allow a user to run their own compiled DLLs?

Asked by: digitalibiz

Under Medium trust, is it possible to allow a user to run their own compiled DLLs?

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Asked On
2008-02-26 at 04:45:42ID23193287
Tags

.net framework

,

web.config

,

medium trust

,

dll

Topic

Microsoft IIS Web Server

Participating Experts
1
Points
250
Comments
3

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Answers

 

by: Abs_jaipurPosted on 2008-02-26 at 04:48:54ID: 20983729

Hi,

No../.If that .dll require full trust then it is not possible to run under the medium trust level.

You can just try to upload all .dll files in the domain /bin folder and try to give Network service permission . But If your .dll require complete full trust level then it will not work.

 

by: digitalibizPosted on 2008-02-26 at 04:49:49ID: 20983739

Is there anyway to create a custom web.config file or something?

 

by: Abs_jaipurPosted on 2008-02-26 at 05:01:26ID: 20983810

Hi,

Yes...You can create custome web.config means custome trust level in which you can add some of the full trust permission l. Please check attached file for the custom trust level and it is not harmful on the shared hsoting server.

You have to create custome.config file and add this refrence in the main web.config
<securityPolicy>
                <trustLevel name="Full" policyFile="internal" />
                <trustLevel name="High" policyFile="web_hightrust.config" />
                <trustLevel name="Medium" policyFile="web_mediumtrust.config" />
                <trustLevel name="Low"  policyFile="web_lowtrust.config" />
                <trustLevel name="Minimal" policyFile="web_minimaltrust.config" />
               <trustLevel name="MyTrust" policyFile="custome.config" />
            </securityPolicy>
            <trust level="MyTrust" originUrl=".*" />

So you will get some full trust permissions.

<configuration>
    <mscorlib>
        <security>
            <policy>
                <PolicyLevel version="1">
                    <SecurityClasses>
                        <SecurityClass Name="SocketPermission" Description="System.Net.SocketPermission, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"/>
                        <SecurityClass Name="OdbcPermission" Description="System.Data.Odbc.OdbcPermission, System.Data, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"/>
                        <SecurityClass Name="OleDbPermission" Description="System.Data.OleDb.OleDbPermission, System.Data, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"/>
                        <SecurityClass Name="AllMembershipCondition" Description="System.Security.Policy.AllMembershipCondition, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"/>
                        <SecurityClass Name="AspNetHostingPermission" Description="System.Web.AspNetHostingPermission, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"/>
                        <SecurityClass Name="DnsPermission" Description="System.Net.DnsPermission, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"/>
                        <SecurityClass Name="EnvironmentPermission" Description="System.Security.Permissions.EnvironmentPermission, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"/>
                        <SecurityClass Name="FileIOPermission" Description="System.Security.Permissions.FileIOPermission, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"/>
                        <SecurityClass Name="FirstMatchCodeGroup" Description="System.Security.Policy.FirstMatchCodeGroup, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"/>
                        <SecurityClass Name="IsolatedStorageFilePermission" Description="System.Security.Permissions.IsolatedStorageFilePermission, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"/>
                        <SecurityClass Name="NamedPermissionSet" Description="System.Security.NamedPermissionSet"/>
                        <SecurityClass Name="PrintingPermission" Description="System.Drawing.Printing.PrintingPermission, System.Drawing, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a"/>
                        <SecurityClass Name="SecurityPermission" Description="System.Security.Permissions.SecurityPermission, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"/>
                        <SecurityClass Name="SmtpPermission" Description="System.Net.Mail.SmtpPermission, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"/>
                        <SecurityClass Name="SqlClientPermission" Description="System.Data.SqlClient.SqlClientPermission, System.Data, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"/>
                        <SecurityClass Name="StrongNameMembershipCondition" Description="System.Security.Policy.StrongNameMembershipCondition, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"/>
                        <SecurityClass Name="UIPermission" Description="System.Security.Permissions.UIPermission, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"/>
                        <SecurityClass Name="UnionCodeGroup" Description="System.Security.Policy.UnionCodeGroup, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"/>
                        <SecurityClass Name="UrlMembershipCondition" Description="System.Security.Policy.UrlMembershipCondition, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"/>
                        <SecurityClass Name="WebPermission" Description="System.Net.WebPermission, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"/>
                        <SecurityClass Name="ZoneMembershipCondition" Description="System.Security.Policy.ZoneMembershipCondition, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"/>
                    </SecurityClasses>
                    <NamedPermissionSets>
                        <PermissionSet
                                class="NamedPermissionSet"
                                version="1"
                                Unrestricted="true"
                                Name="FullTrust"
                                Description="Allows full access to all resources"
                        />
                        <PermissionSet
                                class="NamedPermissionSet"
                                version="1"
                                Name="Nothing"
                                Description="Denies all resources, including the right to execute"
                        />
                        <PermissionSet
                                class="NamedPermissionSet"
                                version="1"
                                Name="ASP.Net">
                            <IPermission
                                    class="AspNetHostingPermission"
                                    version="1"
                                    Level="Medium"
                            />
                            <IPermission
                                    class="DnsPermission"
                                    version="1"
                                    Unrestricted="true"
                            />
                            <IPermission
                                    class="EnvironmentPermission"
                                    version="1"
                                    Read="TEMP;TMP;USERNAME;OS;COMPUTERNAME"
                            />
                            <IPermission
                                    class="FileIOPermission"
                                    version="1"
                                    Read="$AppDir$"
                                    Write="$AppDir$"
                                    Append="$AppDir$"
                                    PathDiscovery="$AppDir$"
                            />
                            <IPermission
                                    class="IsolatedStorageFilePermission"
                                    version="1"
                                    Allowed="AssemblyIsolationByUser"
                                    UserQuota="9223372036854775807"
                            />
                            <IPermission
                                    class="PrintingPermission"
                                    version="1"
                                    Level="DefaultPrinting"
                            />
                            <IPermission
                                    class="SecurityPermission"
                                    version="1"
                                    Flags="Assertion, Execution, ControlThread, ControlPrincipal, RemotingConfiguration"
                            />
                            <IPermission
                                    class="SmtpPermission"
                                    version="1"
                                    Access="Connect"
                            />
                            <IPermission
                                    class="SqlClientPermission"
                                    version="1"
                                    Unrestricted="true"
                            />
                            <IPermission
                                    class="WebPermission"
                                    version="1">
                                <ConnectAccess>
                                    <URI uri="$OriginHost$"/>
                                </ConnectAccess>
                            </IPermission>
                           <IPermission
                                  class="OleDbPermission" 
                                  version="1" 
                          Unrestricted="true"
                         />
                          <IPermission
                                   class="OdbcPermission" 
                                   version="1" 
                                   Unrestricted="true"
                          />
                          <IPermission
                                   class="SocketPermission"
                                   version="1"
                                   Unrestricted="true"
                           />
                        </PermissionSet>
                    </NamedPermissionSets>
                    <CodeGroup
                            class="FirstMatchCodeGroup"
                            version="1"
                            PermissionSetName="Nothing">
                        <IMembershipCondition
                                class="AllMembershipCondition"
                                version="1"
                        />
                        <CodeGroup
                                class="UnionCodeGroup"
                                version="1"
                                PermissionSetName="ASP.Net">
                            <IMembershipCondition
                                    class="UrlMembershipCondition"
                                    version="1"
                                    Url="$AppDirUrl$/*"
                            />
                        </CodeGroup>
                        <CodeGroup
                                class="UnionCodeGroup"
                                version="1"
                                PermissionSetName="ASP.Net">
                            <IMembershipCondition
                                    class="UrlMembershipCondition"
                                    version="1"
                                    Url="$CodeGen$/*"
                            />
                        </CodeGroup>
                        <CodeGroup class="UnionCodeGroup" version="1" PermissionSetName="Nothing">
                        	<IMembershipCondition
                                class="ZoneMembershipCondition"
                                version="1"
                                Zone="MyComputer" />
                            <CodeGroup
                                    class="UnionCodeGroup"
                                    version="1"
                                    PermissionSetName="FullTrust"
                                    Name="Microsoft_Strong_Name"
                                    Description="This code group grants code signed with the Microsoft strong name full trust. ">
                                <IMembershipCondition
                                        class="StrongNameMembershipCondition"
                                        version="1"
                                        PublicKeyBlob="002400000480000094000000060200000024000052534131000400000100010007D1FA57C4AED9F0A32E84AA0FAEFD0DE9E8FD6AEC8F87FB03766C834C99921EB23BE79AD9D5DCC1DD9AD236132102900B723CF980957FC4E177108FC607774F29E8320E92EA05ECE4E821C0A5EFE8F1645C4C0C93C1AB99285D622CAA652C1DFAD63D745D6F2DE5F17E5EAF0FC4963D261C8A12436518206DC093344D5AD293"
                                />
                            </CodeGroup>
                            <CodeGroup
                                    class="UnionCodeGroup"
                                    version="1"
                                    PermissionSetName="FullTrust"
                                    Name="Ecma_Strong_Name"
                                    Description="This code group grants code signed with the ECMA strong name full trust. ">
                                <IMembershipCondition
                                        class="StrongNameMembershipCondition"
                                        version="1"
                                        PublicKeyBlob="00000000000000000400000000000000"
                                />
                            </CodeGroup>
                        </CodeGroup>
                    </CodeGroup>
                </PolicyLevel>
            </policy>
        </security>
    </mscorlib>
</configuration>
                                              
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