FirstMatchCodeGroup Classe
Definição
Importante
Algumas informações se referem a produtos de pré-lançamento que podem ser substancialmente modificados antes do lançamento. A Microsoft não oferece garantias, expressas ou implícitas, das informações aqui fornecidas.
Cuidado
This type is obsolete. See http://go.microsoft.com/fwlink/?LinkID=155570 for more information.
Cuidado
This type is obsolete. See https://go.microsoft.com/fwlink/?LinkID=155570 for more information.
Cuidado
Code Access Security is not supported or honored by the runtime.
Cuidado
This type is obsolete and will be removed in a future release of the .NET Framework. See http://go.microsoft.com/fwlink/?LinkID=155570 for more information.
Permite que a política de segurança a ser definida pela união da declaração de política de um grupo de códigos e aquela do primeiro grupo de códigos filho que corresponda. Essa classe não pode ser herdada.
public ref class FirstMatchCodeGroup sealed : System::Security::Policy::CodeGroup[System.Obsolete("This type is obsolete. See http://go.microsoft.com/fwlink/?LinkID=155570 for more information.")]
public sealed class FirstMatchCodeGroup : System.Security.Policy.CodeGroup[System.Obsolete("This type is obsolete. See https://go.microsoft.com/fwlink/?LinkID=155570 for more information.")]
public sealed class FirstMatchCodeGroup : System.Security.Policy.CodeGroup[System.Obsolete("Code Access Security is not supported or honored by the runtime.")]
public sealed class FirstMatchCodeGroup : System.Security.Policy.CodeGroup[System.Serializable]
public sealed class FirstMatchCodeGroup : System.Security.Policy.CodeGroup[System.Serializable]
[System.Runtime.InteropServices.ComVisible(true)]
public sealed class FirstMatchCodeGroup : System.Security.Policy.CodeGroup[System.Serializable]
[System.Runtime.InteropServices.ComVisible(true)]
[System.Obsolete("This type is obsolete and will be removed in a future release of the .NET Framework. See http://go.microsoft.com/fwlink/?LinkID=155570 for more information.")]
public sealed class FirstMatchCodeGroup : System.Security.Policy.CodeGroup[<System.Obsolete("This type is obsolete. See http://go.microsoft.com/fwlink/?LinkID=155570 for more information.")>]
type FirstMatchCodeGroup = class
inherit CodeGroup[<System.Obsolete("This type is obsolete. See https://go.microsoft.com/fwlink/?LinkID=155570 for more information.")>]
type FirstMatchCodeGroup = class
inherit CodeGroup[<System.Obsolete("Code Access Security is not supported or honored by the runtime.")>]
type FirstMatchCodeGroup = class
inherit CodeGroup[<System.Serializable>]
type FirstMatchCodeGroup = class
inherit CodeGroup[<System.Serializable>]
[<System.Runtime.InteropServices.ComVisible(true)>]
type FirstMatchCodeGroup = class
inherit CodeGroup[<System.Serializable>]
[<System.Runtime.InteropServices.ComVisible(true)>]
[<System.Obsolete("This type is obsolete and will be removed in a future release of the .NET Framework. See http://go.microsoft.com/fwlink/?LinkID=155570 for more information.")>]
type FirstMatchCodeGroup = class
inherit CodeGroupPublic NotInheritable Class FirstMatchCodeGroup
Inherits CodeGroup- Herança
- Atributos
Exemplos
O exemplo a seguir mostra o uso de membros da FirstMatchCodeGroup classe.
using namespace System;
using namespace System::Security;
using namespace System::Security::Policy;
using namespace System::Security::Permissions;
using namespace System::Reflection;
ref class Members
{
public:
[STAThread]
static void Main()
{
// Create a new FirstMatchCodeGroup.
FirstMatchCodeGroup^ codeGroup = constructDefaultGroup();
// Create a deep copy of the FirstMatchCodeGroup.
FirstMatchCodeGroup^ copyCodeGroup =
dynamic_cast<FirstMatchCodeGroup^>(codeGroup->Copy());
// Compare the original code group with the copy.
CompareTwoCodeGroups( codeGroup, copyCodeGroup );
addPolicy( &codeGroup );
addXmlMember( &codeGroup );
updateMembershipCondition( &codeGroup );
addChildCodeGroup( &codeGroup );
Console::Write( L"Comparing the resolved code group " );
Console::WriteLine( L"with the initial code group." );
FirstMatchCodeGroup^ resolvedCodeGroup =
ResolveGroupToEvidence( codeGroup );
if ( CompareTwoCodeGroups( codeGroup, resolvedCodeGroup ) )
{
PrintCodeGroup( resolvedCodeGroup );
}
else
{
PrintCodeGroup( codeGroup );
}
Console::WriteLine( L"This sample completed successfully; "
L"press Enter to exit." );
Console::ReadLine();
}
private:
// Create a FirstMatchCodeGroup with an exclusive policy and membership
// condition.
static FirstMatchCodeGroup^ constructDefaultGroup()
{
// Construct a new FirstMatchCodeGroup with Read, Write, Append
// and PathDiscovery access.
// Create read access permission to the root directory on drive C.
FileIOPermission^ rootFilePermissions =
gcnew FileIOPermission( PermissionState::None );
rootFilePermissions->AllLocalFiles = FileIOPermissionAccess::Read;
rootFilePermissions->SetPathList( FileIOPermissionAccess::Read, L"C:\\" );
// Add a permission to a named permission set.
NamedPermissionSet^ namedPermissions =
gcnew NamedPermissionSet( L"RootPermissions" );
namedPermissions->AddPermission( rootFilePermissions );
// Create a PolicyStatement with exclusive rights to the policy.
PolicyStatement^ policy = gcnew PolicyStatement(
namedPermissions,PolicyStatementAttribute::Exclusive );
// Create a FirstMatchCodeGroup with a membership condition that
// matches all code, and an exclusive policy.
FirstMatchCodeGroup^ codeGroup = gcnew FirstMatchCodeGroup(
gcnew AllMembershipCondition,policy );
// Set the name of the first match code group.
codeGroup->Name = L"TempCodeGroup";
// Set the description of the first match code group.
codeGroup->Description = L"Temp folder permissions group";
return codeGroup;
}
// Add file permission to restrict write access to all files
// on the local machine.
static void addPolicy( interior_ptr<FirstMatchCodeGroup^> codeGroup )
{
// Set the PolicyStatement property to a policy with read access to
// the root directory on drive C.
FileIOPermission^ rootFilePermissions =
gcnew FileIOPermission( PermissionState::None );
rootFilePermissions->AllLocalFiles = FileIOPermissionAccess::Read;
rootFilePermissions->SetPathList( FileIOPermissionAccess::Read, L"C:\\" );
NamedPermissionSet^ namedPermissions =
gcnew NamedPermissionSet( L"RootPermissions" );
namedPermissions->AddPermission( rootFilePermissions );
// Create a PolicyStatement with exclusive rights to the policy.
PolicyStatement^ policy = gcnew PolicyStatement(
namedPermissions,PolicyStatementAttribute::Exclusive );
( *codeGroup )->PolicyStatement = policy;
}
// Set the membership condition of the code group.
static void updateMembershipCondition(
interior_ptr<FirstMatchCodeGroup^> codeGroup )
{
// Set the membership condition of the specified FirstMatchCodeGroup
// to the Intranet zone.
ZoneMembershipCondition^ zoneCondition =
gcnew ZoneMembershipCondition( SecurityZone::Intranet );
( *codeGroup )->MembershipCondition = zoneCondition;
}
// Create a child code group with read-access file permissions and add it
// to the specified code group.
static void addChildCodeGroup( interior_ptr<FirstMatchCodeGroup^> codeGroup )
{
// Create a first match code group with read access.
FileIOPermission^ rootFilePermissions = gcnew FileIOPermission(
PermissionState::None );
rootFilePermissions->AllLocalFiles = FileIOPermissionAccess::Read;
rootFilePermissions->SetPathList( FileIOPermissionAccess::Read, L"C:\\" );
PermissionSet^ permissions = gcnew PermissionSet(
PermissionState::Unrestricted );
permissions->AddPermission( rootFilePermissions );
FirstMatchCodeGroup^ tempFolderCodeGroup =
gcnew FirstMatchCodeGroup( gcnew AllMembershipCondition,
gcnew PolicyStatement( permissions ) );
// Set the name of the child code group and add it to
// the specified code group.
tempFolderCodeGroup->Name = L"Read-only code group";
( *codeGroup )->AddChild( tempFolderCodeGroup );
}
// Compare the two FirstMatchCodeGroups.
static bool CompareTwoCodeGroups( FirstMatchCodeGroup^ firstCodeGroup,
FirstMatchCodeGroup^ secondCodeGroup )
{
// Compare the two specified FirstMatchCodeGroups for equality.
if ( firstCodeGroup->Equals( secondCodeGroup ) )
{
Console::WriteLine( L"The two code groups are equal." );
return true;
}
else
{
Console::WriteLine( L"The two code groups are not equal." );
return false;
}
}
// Retrieve the resolved policy based on executing evidence found
// in the specified code group.
static String^ ResolveEvidence( CodeGroup^ codeGroup )
{
String^ policyString = L"None";
// Resolve the policy based on the executing assembly's evidence.
Assembly^ assembly = Members::typeid->Assembly;
Evidence^ executingEvidence = assembly->Evidence;
PolicyStatement^ policy = codeGroup->Resolve( executingEvidence );
if ( policy != nullptr )
{
policyString = policy->ToString();
}
return policyString;
}
// Retrieve the resolved code group based on the evidence from the
// specified code group.
static FirstMatchCodeGroup^ ResolveGroupToEvidence(
FirstMatchCodeGroup^ codeGroup )
{
// Resolve matching code groups to the executing assembly.
Assembly^ assembly = Members::typeid->Assembly;
Evidence^ evidence = assembly->Evidence;
CodeGroup^ resolvedCodeGroup =
codeGroup->ResolveMatchingCodeGroups( evidence );
return dynamic_cast<FirstMatchCodeGroup^>(resolvedCodeGroup);
}
// If a domain attribute is not found in the specified
// FirstMatchCodeGroup, add a child XML element identifying a custom
// membership condition.
static void addXmlMember( interior_ptr<FirstMatchCodeGroup^> codeGroup )
{
SecurityElement^ xmlElement = ( *codeGroup )->ToXml();
SecurityElement^ rootElement = gcnew SecurityElement( L"CodeGroup" );
if ( xmlElement->Attribute(L"domain") == nullptr )
{
SecurityElement^ newElement = gcnew SecurityElement(
L"CustomMembershipCondition" );
newElement->AddAttribute( L"class", L"CustomMembershipCondition" );
newElement->AddAttribute( L"version", L"1" );
newElement->AddAttribute( L"domain", L"contoso.com" );
rootElement->AddChild( newElement );
( *codeGroup )->FromXml( rootElement );
}
Console::WriteLine( L"Added a custom membership condition:" );
Console::WriteLine( rootElement );
}
// Print the properties of the specified code group to the console.
static void PrintCodeGroup( CodeGroup^ codeGroup )
{
// Compare the type of the specified object with the
// FirstMatchCodeGroup type.
if ( !codeGroup->GetType()->Equals( FirstMatchCodeGroup::typeid ) )
{
throw gcnew ArgumentException( L"Expected the FirstMatchCodeGroup type." );
}
String^ codeGroupName = codeGroup->Name;
String^ membershipCondition = codeGroup->MembershipCondition->ToString();
String^ permissionSetName = codeGroup->PermissionSetName;
int hashCode = codeGroup->GetHashCode();
String^ mergeLogic = L"";
if ( codeGroup->MergeLogic->Equals( L"First Match" ) )
{
mergeLogic = L"with first-match merge logic";
}
// Retrieve the class path for the FirstMatchCodeGroup.
String^ firstMatchGroupClass = codeGroup->ToString();
String^ attributeString = L"";
// Retrieve the string representation of the FirstMatchCodeGroup's
// attributes.
if ( codeGroup->AttributeString != nullptr )
{
attributeString = codeGroup->AttributeString;
}
// Write a summary to the console window.
Console::WriteLine( L"\n*** {0} summary ***", firstMatchGroupClass );
Console::Write( L"A FirstMatchCodeGroup named " );
Console::Write( L"{0}{1}", codeGroupName, mergeLogic );
Console::Write( L" has been created with hash code({0}).", hashCode );
Console::Write( L"\nThis code group contains a {0}", membershipCondition );
Console::Write( L" membership condition with the " );
Console::WriteLine( L"{0} permission set.", permissionSetName );
Console::Write( L"The code group contains the following policy: " );
Console::Write( ResolveEvidence( codeGroup ) );
Console::Write( L"\nIt also contains the following attributes: " );
Console::WriteLine( attributeString );
int childCount = codeGroup->Children->Count;
if ( childCount > 0 )
{
Console::Write( L"There are {0}", childCount );
Console::WriteLine( L" child elements in the code group." );
// Iterate through the child code groups to display their names
// and then remove them from the specified code group.
for ( int i = 0; i < childCount; i++ )
{
// Retrieve a child code group, which has been cast as a
// FirstMatchCodeGroup type.
FirstMatchCodeGroup^ childCodeGroup =
dynamic_cast<FirstMatchCodeGroup^>(codeGroup->Children->default[ i ]);
Console::Write( L"Removing the {0}.", childCodeGroup->Name );
// Remove the child code group.
codeGroup->RemoveChild( childCodeGroup );
}
Console::WriteLine();
}
else
{
Console::WriteLine( L" No child code groups were found in this"
L" code group." );
}
}
};
int main()
{
Members::Main();
}
//
// This sample produces the following output:
//
// The two code groups are equal.
// Added a custom membership condition:
// <CustomMembershipCondition class="CustomMembershipCondition"
// version="1"
// domain="contoso.com"/>
//
// Comparing the resolved code group with the initial code group.
// The two code groups are not equal.
//
// *** System.Security.Policy.FirstMatchCodeGroup summary ***
// A FirstMatchCodeGroup named with first-match merge logic has been created
// with hash code(113151525).
// This code group contains a Zone - Intranet membership condition with the
// permission set. The code group contains the following policy:
// It also contains the following attributes:
// There are 1 child elements in the code group.
// Removing the Read-only code group.
// This sample completed successfully; press Enter to exit.
using System;
using System.Security;
using System.Security.Policy;
using System.Security.Permissions;
using System.Reflection;
class Members
{
[STAThread]
static void Main(string[] args)
{
// Create a new FirstMatchCodeGroup.
FirstMatchCodeGroup codeGroup = constructDefaultGroup();
// Create a deep copy of the FirstMatchCodeGroup.
FirstMatchCodeGroup copyCodeGroup =
(FirstMatchCodeGroup)codeGroup.Copy();
// Compare the original code group with the copy.
CompareTwoCodeGroups(codeGroup, copyCodeGroup);
addPolicy(ref codeGroup);
addXmlMember(ref codeGroup);
updateMembershipCondition(ref codeGroup);
addChildCodeGroup(ref codeGroup);
Console.Write("Comparing the resolved code group ");
Console.WriteLine("with the initial code group.");
FirstMatchCodeGroup resolvedCodeGroup =
ResolveGroupToEvidence(codeGroup);
if (CompareTwoCodeGroups(codeGroup, resolvedCodeGroup))
{
PrintCodeGroup(resolvedCodeGroup);
}
else
{
PrintCodeGroup(codeGroup);
}
Console.WriteLine("This sample completed successfully; " +
"press Enter to exit.");
Console.ReadLine();
}
// Create a FirstMatchCodeGroup with an exclusive policy and membership
// condition.
private static FirstMatchCodeGroup constructDefaultGroup()
{
// Construct a new FirstMatchCodeGroup with Read, Write, Append
// and PathDiscovery access.
// Create read access permission to the root directory on drive C.
FileIOPermission rootFilePermissions =
new FileIOPermission(PermissionState.None);
rootFilePermissions.AllLocalFiles = FileIOPermissionAccess.Read;
rootFilePermissions.SetPathList(FileIOPermissionAccess.Read,"C:\\");
// Add a permission to a named permission set.
NamedPermissionSet namedPermissions =
new NamedPermissionSet("RootPermissions");
namedPermissions.AddPermission(rootFilePermissions);
// Create a PolicyStatement with exclusive rights to the policy.
PolicyStatement policy = new PolicyStatement(
namedPermissions,PolicyStatementAttribute.Exclusive);
// Create a FirstMatchCodeGroup with a membership condition that
// matches all code, and an exclusive policy.
FirstMatchCodeGroup codeGroup =
new FirstMatchCodeGroup(
new AllMembershipCondition(),
policy);
// Set the name of the first match code group.
codeGroup.Name = "TempCodeGroup";
// Set the description of the first match code group.
codeGroup.Description = "Temp folder permissions group";
return codeGroup;
}
// Add file permission to restrict write access to all files
// on the local machine.
private static void addPolicy(ref FirstMatchCodeGroup codeGroup)
{
// Set the PolicyStatement property to a policy with read access to
// the root directory on drive C.
FileIOPermission rootFilePermissions =
new FileIOPermission(PermissionState.None);
rootFilePermissions.AllLocalFiles = FileIOPermissionAccess.Read;
rootFilePermissions.SetPathList(FileIOPermissionAccess.Read,"C:\\");
NamedPermissionSet namedPermissions =
new NamedPermissionSet("RootPermissions");
namedPermissions.AddPermission(rootFilePermissions);
// Create a PolicyStatement with exclusive rights to the policy.
PolicyStatement policy = new PolicyStatement(
namedPermissions,
PolicyStatementAttribute.Exclusive);
codeGroup.PolicyStatement = policy;
}
// Set the membership condition of the code group.
private static void updateMembershipCondition(
ref FirstMatchCodeGroup codeGroup)
{
// Set the membership condition of the specified FirstMatchCodeGroup
// to the Intranet zone.
ZoneMembershipCondition zoneCondition =
new ZoneMembershipCondition(SecurityZone.Intranet);
codeGroup.MembershipCondition = zoneCondition;
}
// Create a child code group with read-access file permissions and add it
// to the specified code group.
private static void addChildCodeGroup(ref FirstMatchCodeGroup codeGroup)
{
// Create a first match code group with read access.
FileIOPermission rootFilePermissions =
new FileIOPermission(PermissionState.None);
rootFilePermissions.AllLocalFiles = FileIOPermissionAccess.Read;
rootFilePermissions.SetPathList(FileIOPermissionAccess.Read,"C:\\");
PermissionSet permissions =
new PermissionSet(PermissionState.Unrestricted);
permissions.AddPermission(rootFilePermissions);
FirstMatchCodeGroup tempFolderCodeGroup = new FirstMatchCodeGroup(
new AllMembershipCondition(),
new PolicyStatement(permissions));
// Set the name of the child code group and add it to
// the specified code group.
tempFolderCodeGroup.Name = "Read-only code group";
codeGroup.AddChild(tempFolderCodeGroup);
}
// Compare the two FirstMatchCodeGroups.
private static bool CompareTwoCodeGroups(
FirstMatchCodeGroup firstCodeGroup,
FirstMatchCodeGroup secondCodeGroup)
{
// Compare the two specified FirstMatchCodeGroups for equality.
if (firstCodeGroup.Equals(secondCodeGroup))
{
Console.WriteLine("The two code groups are equal.");
return true;
}
else
{
Console.WriteLine("The two code groups are not equal.");
return false;
}
}
// Retrieve the resolved policy based on executing evidence found
// in the specified code group.
private static string ResolveEvidence(CodeGroup codeGroup)
{
string policyString = "None";
// Resolve the policy based on the executing assembly's evidence.
Assembly assembly = typeof(Members).Assembly;
Evidence executingEvidence = assembly.Evidence;
PolicyStatement policy = codeGroup.Resolve(executingEvidence);
if (policy != null)
{
policyString = policy.ToString();
}
return policyString;
}
// Retrieve the resolved code group based on the evidence from the
// specified code group.
private static FirstMatchCodeGroup ResolveGroupToEvidence(
FirstMatchCodeGroup codeGroup)
{
// Resolve matching code groups to the executing assembly.
Assembly assembly = typeof(Members).Assembly;
Evidence evidence = assembly.Evidence;
CodeGroup resolvedCodeGroup =
codeGroup.ResolveMatchingCodeGroups(evidence);
return (FirstMatchCodeGroup)resolvedCodeGroup;
}
// If a domain attribute is not found in the specified
// FirstMatchCodeGroup, add a child XML element identifying a custom
// membership condition.
private static void addXmlMember(ref FirstMatchCodeGroup codeGroup)
{
SecurityElement xmlElement = codeGroup.ToXml();
SecurityElement rootElement = new SecurityElement("CodeGroup");
if (xmlElement.Attribute("domain") == null)
{
SecurityElement newElement =
new SecurityElement("CustomMembershipCondition");
newElement.AddAttribute("class","CustomMembershipCondition");
newElement.AddAttribute("version","1");
newElement.AddAttribute("domain","contoso.com");
rootElement.AddChild(newElement);
codeGroup.FromXml(rootElement);
}
Console.WriteLine("Added a custom membership condition:");
Console.WriteLine(rootElement.ToString());
}
// Print the properties of the specified code group to the console.
private static void PrintCodeGroup(CodeGroup codeGroup)
{
// Compare the type of the specified object with the
// FirstMatchCodeGroup type.
if (!codeGroup.GetType().Equals(typeof(FirstMatchCodeGroup)))
{
throw new ArgumentException(
"Expected the FirstMatchCodeGroup type.");
}
string codeGroupName = codeGroup.Name;
string membershipCondition = codeGroup.MembershipCondition.ToString();
string permissionSetName = codeGroup.PermissionSetName;
int hashCode = codeGroup.GetHashCode();
string mergeLogic = "";
if (codeGroup.MergeLogic.Equals("First Match"))
{
mergeLogic = "with first-match merge logic";
}
// Retrieve the class path for the FirstMatchCodeGroup.
string firstMatchGroupClass = codeGroup.ToString();
string attributeString = "";
// Retrieve the string representation of the FirstMatchCodeGroup's
// attributes.
if (codeGroup.AttributeString != null)
{
attributeString = codeGroup.AttributeString;
}
// Write a summary to the console window.
Console.WriteLine("\n*** " + firstMatchGroupClass + " summary ***");
Console.Write("A FirstMatchCodeGroup named ");
Console.Write(codeGroupName + mergeLogic);
Console.Write(" has been created with hash code(" + hashCode + ").");
Console.Write("\nThis code group contains a " + membershipCondition);
Console.Write(" membership condition with the ");
Console.WriteLine(permissionSetName + " permission set.");
Console.Write("The code group contains the following policy: ");
Console.Write(ResolveEvidence(codeGroup));
Console.Write("\nIt also contains the following attributes: ");
Console.WriteLine(attributeString);
int childCount = codeGroup.Children.Count;
if (childCount > 0 )
{
Console.Write("There are " + childCount);
Console.WriteLine(" child elements in the code group.");
// Iterate through the child code groups to display their names
// and then remove them from the specified code group.
for (int i=0; i < childCount; i++)
{
// Retrieve a child code group, which has been cast as a
// FirstMatchCodeGroup type.
FirstMatchCodeGroup childCodeGroup =
(FirstMatchCodeGroup)codeGroup.Children[i];
Console.Write("Removing the " + childCodeGroup.Name + ".");
// Remove the child code group.
codeGroup.RemoveChild(childCodeGroup);
}
Console.WriteLine();
}
else
{
Console.WriteLine(" No child code groups were found in this" +
" code group.");
}
}
}
//
// This sample produces the following output:
//
// The two code groups are equal.
// Added a custom membership condition:
// <CustomMembershipCondition class="CustomMembershipCondition"
// version="1"
// domain="contoso.com"/>
//
// Comparing the resolved code group with the initial code group.
// The two code groups are not equal.
//
// *** System.Security.Policy.FirstMatchCodeGroup summary ***
// A FirstMatchCodeGroup named with first-match merge logic has been created
// with hash code(113151525).
// This code group contains a Zone - Intranet membership condition with the
// permission set. The code group contains the following policy:
// It also contains the following attributes:
// There are 1 child elements in the code group.
// Removing the Read-only code group.
// This sample completed successfully; press Enter to exit.
Imports System.Security
Imports System.Security.Policy
Imports System.Security.Permissions
Imports System.Reflection
Imports System.Windows.Forms
Public Class Form1
Inherits System.Windows.Forms.Form
' Event handler for Run button.
Private Sub Button1_Click( _
ByVal sender As System.Object, _
ByVal e As System.EventArgs) Handles Button1.Click
tbxOutput.Cursor = Cursors.WaitCursor
tbxOutput.Text = ""
' Create a new FirstMatchCodeGroup.
Dim codeGroup As FirstMatchCodeGroup = constructDefaultGroup()
' Create a deep copy of the FirstMatchCodeGroup.
Dim copyCodeGroup As FirstMatchCodeGroup
copyCodeGroup = CType(codeGroup.Copy(), FirstMatchCodeGroup)
' Compare the original code group with the copy.
CompareTwoCodeGroups(codeGroup, copyCodeGroup)
addPolicy(codeGroup)
addXmlMember(codeGroup)
updateMembershipCondition(codeGroup)
addChildCodeGroup(codeGroup)
Write("Comparing the resolved code group ")
WriteLine("with the initial code group.")
Dim resolvedCodeGroup As FirstMatchCodeGroup
resolvedCodeGroup = ResolveGroupToEvidence(codeGroup)
If (CompareTwoCodeGroups(codeGroup, resolvedCodeGroup)) Then
PrintCodeGroup(resolvedCodeGroup)
Else
PrintCodeGroup(codeGroup)
End If
' Reset the cursor and conclude application.
tbxOutput.AppendText(vbCrLf + "This sample completed " + _
"successfully; press Exit to continue.")
tbxOutput.Cursor = Cursors.Default
End Sub
' Create a FirstMatchCodeGroup with an exclusive policy and membership
' condition.
Private Function constructDefaultGroup() As FirstMatchCodeGroup
' Construct a new FirstMatchCodeGroup with Read, Write, Append
' and PathDiscovery access.
' Create read access permission to the root directory on drive C.
Dim rootFilePermissions As New FileIOPermission(PermissionState.None)
rootFilePermissions.AllLocalFiles = FileIOPermissionAccess.Read
rootFilePermissions.SetPathList(FileIOPermissionAccess.Read, "C:\\")
' Add a permission to a named permission set.
Dim namedPermissions As New NamedPermissionSet("RootPermissions")
namedPermissions.AddPermission(rootFilePermissions)
' Create a PolicyStatement with exclusive rights to the policy.
Dim policy As New PolicyStatement( _
namedPermissions, _
PolicyStatementAttribute.Exclusive)
' Create a FirstMatchCodeGroup with a membership condition that
' matches all code, and an exclusive policy.
Dim codeGroup As New FirstMatchCodeGroup( _
New AllMembershipCondition, _
policy)
' Set the name of the first match code group.
codeGroup.Name = "TempCodeGroup"
' Set the description of the first match code group.
codeGroup.Description = "Temp folder permissions group"
Return codeGroup
End Function
' Add file permission to restrict write access to all files
' on the local machine.
Private Sub addPolicy(ByRef codeGroup As FirstMatchCodeGroup)
' Set the PolicyStatement property to a policy with read access to the
' root directory on drive C.
Dim rootFilePermissions As New FileIOPermission(PermissionState.None)
rootFilePermissions.AllLocalFiles = FileIOPermissionAccess.Read
rootFilePermissions.SetPathList(FileIOPermissionAccess.Read, "C:\\")
Dim namedPermissions As New NamedPermissionSet("RootPermissions")
namedPermissions.AddPermission(rootFilePermissions)
' Create a PolicyStatement with exclusive rights to the policy.
Dim policy As New PolicyStatement( _
namedPermissions, _
PolicyStatementAttribute.Exclusive)
codeGroup.PolicyStatement = policy
End Sub
' Set the membership condition of the code group.
Private Sub updateMembershipCondition( _
ByRef codeGroup As FirstMatchCodeGroup)
' Set the membership condition of the specified FirstMatchCodeGroup
' to the Intranet zone.
Dim zoneCondition As _
New ZoneMembershipCondition(SecurityZone.Intranet)
codeGroup.MembershipCondition = zoneCondition
End Sub
' Create a child code group with read-access file permissions and add it
' to the specified code group.
Private Sub addChildCodeGroup(ByRef codegroup As FirstMatchCodeGroup)
' Create a first match code group with read access.
Dim rootFilePermissions As New FileIOPermission(PermissionState.None)
rootFilePermissions.AllLocalFiles = FileIOPermissionAccess.Read
rootFilePermissions.SetPathList(FileIOPermissionAccess.Read, "C:\\")
Dim permissions As New PermissionSet(PermissionState.Unrestricted)
permissions.AddPermission(rootFilePermissions)
Dim tempFolderCodeGroup = New FirstMatchCodeGroup( _
New AllMembershipCondition, _
New PolicyStatement(permissions))
' Set the name of the child code group and add it to the specified
' code group.
tempFolderCodeGroup.Name = "Read-only code group"
codegroup.AddChild(tempFolderCodeGroup)
End Sub
' Compare the two FirstMatchCodeGroups.
Private Function CompareTwoCodeGroups( _
ByVal firstCodeGroup As FirstMatchCodeGroup, _
ByVal secondCodeGroup As FirstMatchCodeGroup) As Boolean
' Compare the two specified FirstMatchCodeGroups for equality.
If (firstCodeGroup.Equals(secondCodeGroup)) Then
WriteLine("The two code groups are equal.")
Return True
Else
WriteLine("The two code groups are not equal.")
Return False
End If
End Function
' Retrieve the resolved policy based on executing evidence found
' in the specified code group.
Private Function ResolveEvidence(ByVal codeGroup As CodeGroup) As String
Dim policyString As String = "None"
' Resolve the policy based on the executing assembly's evidence.
Dim executingAssembly As [Assembly] = Me.GetType().Assembly
Dim executingEvidence As Evidence
executingEvidence = executingAssembly.Evidence
Dim policy As PolicyStatement = codeGroup.Resolve(executingEvidence)
If (Not policy Is Nothing) Then
policyString = policy.ToString()
End If
Return policyString
End Function
' Retrieve the resolved code group based on the evidence from the
' specified code group.
Private Function ResolveGroupToEvidence( _
ByVal codegroup As FirstMatchCodeGroup) _
As FirstMatchCodeGroup
' Resolve matching code groups to the executing assembly.
Dim executingAssembly As [Assembly] = Me.GetType().Assembly
Dim evidence As Evidence = executingAssembly.Evidence
Dim resolvedCodeGroup As CodeGroup
resolvedCodeGroup = codegroup.ResolveMatchingCodeGroups(Evidence)
Return CType(resolvedCodeGroup, FirstMatchCodeGroup)
End Function
' If a domain attribute is not found in the specified FirstMatchCodeGroup,
' add a child XML element identifying a custom membership condition.
Private Sub addXmlMember(ByRef codeGroup As FirstMatchCodeGroup)
Dim xmlElement As SecurityElement = codeGroup.ToXml()
Dim rootElement As New SecurityElement("CodeGroup")
If (xmlElement.Attribute("domain") Is Nothing) Then
Dim newElement As New SecurityElement("CustomMembershipCondition")
newElement.AddAttribute("class", "CustomMembershipCondition")
newElement.AddAttribute("version", "1")
newElement.AddAttribute("domain", "contoso.com")
rootElement.AddChild(newElement)
codeGroup.FromXml(rootElement)
End If
WriteLine("Added a custom membership condition:")
WriteLine(rootElement.ToString())
End Sub
' Print the properties of the specified code group to the console.
Private Sub PrintCodeGroup(ByVal codeGroup As CodeGroup)
' Compare the type of the specified object with the
' FirstMatchCodeGroup type.
If (Not codeGroup.GetType() Is GetType(FirstMatchCodeGroup)) Then
Throw New ArgumentException( _
"Expected the FirstMatchCodeGroup type.")
End If
Dim codeGroupName As String = codeGroup.Name
Dim membershipCondition As String
membershipCondition = codeGroup.MembershipCondition.ToString()
Dim permissionSetName As String = codeGroup.PermissionSetName
Dim hashCode As Integer = codeGroup.GetHashCode()
Dim mergeLogic As String = ""
If (codeGroup.MergeLogic.Equals("First Match")) Then
mergeLogic = "with first-match merge logic"
End If
' Retrieve the class path for the FirstMatchCodeGroup.
Dim firstMatchGroupClass As String = codeGroup.ToString()
Dim attributeString As String = ""
' Retrieve the string representation of the FirstMatchCodeGroup's
' attributes.
If (Not codeGroup.AttributeString Is Nothing) Then
attributeString = codeGroup.AttributeString
End If
' Write a summary to the console window.
WriteLine(vbCrLf + "* " + firstMatchGroupClass + " summary *")
Write("A FirstMatchCodeGroup named ")
Write(codeGroupName + mergeLogic)
Write(" has been created with hash code ")
WriteLine(hashCode.ToString() + ". ")
Write("This code group contains a " + membershipCondition)
Write(" membership condition with the ")
Write(permissionSetName + " permission set. ")
Write("The code group contains the following policy: ")
Write(ResolveEvidence(codeGroup) + ". ")
Write("It also contains the following attributes: ")
WriteLine(attributeString)
Dim childCount As Integer = codeGroup.Children.Count
If (childCount > 0) Then
Write("There are " + childCount.ToString())
WriteLine(" child elements in the code group.")
' Iterate through the child code groups to display their names
' and then remove them from the specified code group.
For i As Int16 = 0 To childCount - 1 Step 1
' Retrieve each child explicitly casted as a
' FirstMatchCodeGroup type.
Dim childCodeGroup As FirstMatchCodeGroup
childCodeGroup = _
CType(codeGroup.Children(i), FirstMatchCodeGroup)
Write("Removing the " + childCodeGroup.Name + ".")
' Remove the child code group.
codeGroup.RemoveChild(childCodeGroup)
Next
WriteLine("")
Else
WriteLine("No child code groups were found in this code group.")
End If
End Sub
Private Sub WriteLine(ByVal message As String)
tbxOutput.AppendText(message + vbCrLf)
End Sub
Private Sub Write(ByVal message As String)
tbxOutput.AppendText(message)
End Sub
' Event handler for Exit button.
Private Sub Button2_Click( _
ByVal sender As System.Object, _
ByVal e As System.EventArgs) Handles Button2.Click
Application.Exit()
End Sub
#Region " Windows Form Designer generated code "
Public Sub New()
MyBase.New()
'This call is required by the Windows Form Designer.
InitializeComponent()
'Add any initialization after the InitializeComponent() call
End Sub
'Form overrides dispose to clean up the component list.
Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
If disposing Then
If Not (components Is Nothing) Then
components.Dispose()
End If
End If
MyBase.Dispose(disposing)
End Sub
'Required by the Windows Form Designer
Private components As System.ComponentModel.IContainer
'NOTE: The following procedure is required by the Windows Form Designer
'It can be modified using the Windows Form Designer.
'Do not modify it using the code editor.
Friend WithEvents Panel2 As System.Windows.Forms.Panel
Friend WithEvents Panel1 As System.Windows.Forms.Panel
Friend WithEvents Button1 As System.Windows.Forms.Button
Friend WithEvents Button2 As System.Windows.Forms.Button
Friend WithEvents tbxOutput As System.Windows.Forms.RichTextBox
<System.Diagnostics.DebuggerStepThrough()> _
Private Sub InitializeComponent()
Me.Panel2 = New System.Windows.Forms.Panel
Me.Button1 = New System.Windows.Forms.Button
Me.Button2 = New System.Windows.Forms.Button
Me.Panel1 = New System.Windows.Forms.Panel
Me.tbxOutput = New System.Windows.Forms.RichTextBox
Me.Panel2.SuspendLayout()
Me.Panel1.SuspendLayout()
Me.SuspendLayout()
'
'Panel2
'
Me.Panel2.Controls.Add(Me.Button1)
Me.Panel2.Controls.Add(Me.Button2)
Me.Panel2.Dock = System.Windows.Forms.DockStyle.Bottom
Me.Panel2.DockPadding.All = 20
Me.Panel2.Location = New System.Drawing.Point(0, 320)
Me.Panel2.Name = "Panel2"
Me.Panel2.Size = New System.Drawing.Size(616, 64)
Me.Panel2.TabIndex = 1
'
'Button1
'
Me.Button1.Dock = System.Windows.Forms.DockStyle.Right
Me.Button1.Font = New System.Drawing.Font( _
"Microsoft Sans Serif", _
9.0!, _
System.Drawing.FontStyle.Regular, _
System.Drawing.GraphicsUnit.Point, _
CType(0, Byte))
Me.Button1.Location = New System.Drawing.Point(446, 20)
Me.Button1.Name = "Button1"
Me.Button1.Size = New System.Drawing.Size(75, 24)
Me.Button1.TabIndex = 2
Me.Button1.Text = "&Run"
'
'Button2
'
Me.Button2.Dock = System.Windows.Forms.DockStyle.Right
Me.Button2.Font = New System.Drawing.Font( _
"Microsoft Sans Serif", _
9.0!, _
System.Drawing.FontStyle.Regular, _
System.Drawing.GraphicsUnit.Point, _
CType(0, Byte))
Me.Button2.Location = New System.Drawing.Point(521, 20)
Me.Button2.Name = "Button2"
Me.Button2.Size = New System.Drawing.Size(75, 24)
Me.Button2.TabIndex = 3
Me.Button2.Text = "E&xit"
'
'Panel1
'
Me.Panel1.Controls.Add(Me.tbxOutput)
Me.Panel1.Dock = System.Windows.Forms.DockStyle.Fill
Me.Panel1.DockPadding.All = 20
Me.Panel1.Location = New System.Drawing.Point(0, 0)
Me.Panel1.Name = "Panel1"
Me.Panel1.Size = New System.Drawing.Size(616, 320)
Me.Panel1.TabIndex = 2
'
'tbxOutput
'
Me.tbxOutput.AccessibleDescription = _
"Displays output from application."
Me.tbxOutput.AccessibleName = "Output textbox."
Me.tbxOutput.Dock = System.Windows.Forms.DockStyle.Fill
Me.tbxOutput.Location = New System.Drawing.Point(20, 20)
Me.tbxOutput.Name = "tbxOutput"
Me.tbxOutput.Size = New System.Drawing.Size(576, 280)
Me.tbxOutput.TabIndex = 1
Me.tbxOutput.Text = "Click the Run button to run the application."
'
'Form1
'
Me.AutoScaleBaseSize = New System.Drawing.Size(6, 15)
Me.ClientSize = New System.Drawing.Size(616, 384)
Me.Controls.Add(Me.Panel1)
Me.Controls.Add(Me.Panel2)
Me.Name = "Form1"
Me.Text = "FirstMatchCodeGroup"
Me.Panel2.ResumeLayout(False)
Me.Panel1.ResumeLayout(False)
Me.ResumeLayout(False)
End Sub
#End Region
End Class
'
' This sample produces the following output:
'
' The two code groups are equal.
' Added a custom membership condition:
' <CustomMembershipCondition class="CustomMembershipCondition"
' version="1"
' domain="contoso.com"/>
'
' Comparing the resolved code group with the initial code group.
' The two code groups are not equal.
'
' * System.Security.Policy.FirstMatchCodeGroup summary *
' A FirstMatchCodeGroup named with first-match merge logic has been created
' with hash code 113155593. This code group contains a Zone - Intranet
' membership condition with the permission set. The code group contains the
' following policy: None. It also contains the following attributes:
' There are 1 child elements in the code group.
' Removing the Read-only code group.
'
' This sample completed successfully; press Exit to continue.
Comentários
Os grupos de códigos são os blocos de construção da política de segurança de acesso ao código. Cada nível de política consiste em um grupo de código raiz que pode ter grupos de código filho. Cada grupo de código filho pode ter seus próprios grupos de código filho; esse comportamento se estende a qualquer número de níveis, formando uma árvore. Cada grupo de códigos tem uma condição de associação que determina se um determinado assembly pertence a ele com base nas evidências desse assembly. Somente grupos de código cujas condições de associação correspondem a um determinado assembly e seus grupos de código filho aplicam a política.
Como qualquer grupo de códigos, FirstMatchCodeGroup só se aplica quando sua condição de associação corresponde a evidências de um assembly. Se houver uma correspondência, ele testará a condição de associação de cada filho em ordem, parando quando a primeira correspondência ocorrer. O resultado FirstMatchCodeGroup é a união da instrução de política do grupo de códigos raiz e a instrução política do primeiro grupo filho desse grupo de códigos correspondente.
FirstMatchCodeGroup destina-se ao uso programático por hosts de domínio de aplicativo para definir a política de domínio.
Construtores
| FirstMatchCodeGroup(IMembershipCondition, PolicyStatement) |
Inicializa uma nova instância da classe FirstMatchCodeGroup. |
Propriedades
| AttributeString |
Obtém uma representação de cadeia de caracteres dos atributos da declaração de política para o grupo de códigos. (Herdado de CodeGroup) |
| Children |
Obtém ou define uma lista ordenada dos grupos de códigos filho de um grupo de códigos. (Herdado de CodeGroup) |
| Description |
Obtém ou define a descrição do grupo de códigos. (Herdado de CodeGroup) |
| MembershipCondition |
Obtém ou define a condição de associação do grupo de códigos. (Herdado de CodeGroup) |
| MergeLogic |
Obtém a lógica de mesclagem. |
| Name |
Obtém ou define o nome do grupo de códigos. (Herdado de CodeGroup) |
| PermissionSetName |
Obtém o nome do conjunto de permissões nomeadas para o grupo de códigos. (Herdado de CodeGroup) |
| PolicyStatement |
Obtém ou define a declaração de política associada ao grupo de códigos. (Herdado de CodeGroup) |
Métodos
| AddChild(CodeGroup) |
Adiciona um grupo de códigos filho ao grupo de códigos adicional. (Herdado de CodeGroup) |
| Copy() |
Faz uma cópia em profundidade do grupo de códigos. |
| CreateXml(SecurityElement, PolicyLevel) |
Quando substituído em uma classe derivada, serializa as propriedades e o estado interno específicos a um grupo de códigos derivado e adiciona a serialização ao SecurityElement especificado. (Herdado de CodeGroup) |
| Equals(CodeGroup, Boolean) |
Determina se o grupo de códigos especificado é equivalente ao grupo de códigos atual, verificando os grupos de códigos filho também, se especificado. (Herdado de CodeGroup) |
| Equals(Object) |
Determina se o grupo de códigos especificado é equivalente ao grupo de códigos atual. (Herdado de CodeGroup) |
| FromXml(SecurityElement) |
Recria um objeto de segurança com um estado determinado de uma codificação XML. (Herdado de CodeGroup) |
| FromXml(SecurityElement, PolicyLevel) |
Recria um objeto de segurança com um estado e um nível de política determinados de uma codificação XML. (Herdado de CodeGroup) |
| GetHashCode() |
Obtém o código hash do grupo de códigos atual. (Herdado de CodeGroup) |
| GetType() |
Obtém o Type da instância atual. (Herdado de Object) |
| MemberwiseClone() |
Cria uma cópia superficial do Object atual. (Herdado de Object) |
| ParseXml(SecurityElement, PolicyLevel) |
Quando substituído em uma classe derivada, recria as propriedades e o estado interno específicos para um grupo de códigos derivado do SecurityElement especificado. (Herdado de CodeGroup) |
| RemoveChild(CodeGroup) |
Remove o grupo de códigos filho especificado. (Herdado de CodeGroup) |
| Resolve(Evidence) |
Resolve a política para o grupo de códigos e seus descendentes para um conjunto de evidências. |
| ResolveMatchingCodeGroups(Evidence) |
Resolve os grupos de códigos correspondentes. |
| ToString() |
Retorna uma cadeia de caracteres que representa o objeto atual. (Herdado de Object) |
| ToXml() |
Cria uma codificação XML do objeto de segurança e seu estado atual. (Herdado de CodeGroup) |
| ToXml(PolicyLevel) |
Cria uma codificação de XML do objeto de segurança, seu estado atual e o nível de política no qual o código existe. (Herdado de CodeGroup) |