System.Security.Permissions.SecurityPermissionAttribute Class

Summary

Allows security actions for SecurityPermission to be applied to code using declarative security. This class cannot be inherited.

C# Syntax:

[AttributeUsage(AttributeTargets.Assembly | AttributeTargets.Class | AttributeTargets.Struct | AttributeTargets.Constructor | AttributeTargets.Method)] [Serializable] public sealed class SecurityPermissionAttribute : CodeAccessSecurityAttribute

The scope of the declaration that is allowed depends on the SecurityAction that is used.

The security information declared by a security attribute is stored in the metadata of the attribute target and is accessed by the system at run time. Security attributes are used only for declarative security. For imperative security, use the corresponding permission class.

The following example of a declarative attribute shows the correct way to request SecurityPermission for the ability to assert and states that you must have at least this permission to run your code.

 [assembly:SecurityPermissionAttribute(SecurityAction.RequestMinimum, Assertion=true)]
 //In C#, you must specify that you are using the assembly scope when making a request.

    

The following example shows how to demand that the calling code has SecurityPermission at link time. Demands are typically made in managed libraries (DLLs) to protect methods or classes from potentially harmful code.

 [SecurityPermissionAttribute(SecurityAction.LinkDemand, Unrestricted=true)]

    

System.Security.Permissions Namespace See also:
MSDN: extendingmetadatausingattributes | SecurityPermission | SecurityPermissionFlag

System.Security.Permissions.SecurityPermissionAttribute Member List:

Public Constructors

ctor #1

Initializes a new instance of the SecurityPermissionAttribute class with the specified SecurityAction.

Public Properties

Action (inherited from System.Security.Permissions.SecurityAttribute)	Read-write See base class member description: System.Security.Permissions.SecurityAttribute.Action Gets or sets a security action.
Assertion	Read-write Gets or sets a value indicating whether permission to assert that all this code's callers have the requisite permission for the operation is declared.
ControlAppDomain	Read-write Gets or sets a value indicating whether permission to manipulate AppDomain is declared.
ControlDomainPolicy	Read-write Gets or sets a value indicating whether permission to alter or manipulate domain security policy is declared.
ControlEvidence	Read-write Gets or sets a value indicating whether permission to alter or manipulate evidence is declared.
ControlPolicy	Read-write Gets or sets a value indicating whether permission to view and manipulate security policy is declared.
ControlPrincipal	Read-write Gets or sets a value indicating whether permission to manipulate the current principal is declared.
ControlThread	Read-write Gets or sets a value indicating whether permission to manipulate threads is declared.
Execution	Read-write Gets or sets a value indicating whether permission to execute code is declared.
Flags	Read-write Gets or sets all permission flags comprising the SecurityPermission permissions.
Infrastructure	Read-write Gets or sets a value indicating whether code can plug into the common language runtime infrastructure, such as adding Remoting Context Sinks, Envoy Sinks and Dynamic Sinks.
RemotingConfiguration	Read-write Gets or sets a value indicating whether code can configure remoting types and channels.
SerializationFormatter	Read-write Gets or sets a value indicating whether code can use a serialization formatter to serialize or deserialize an object.
SkipVerification	Read-write Gets or sets a value indicating whether permission to bypass code verification is declared.
TypeId (inherited from System.Attribute)	Read-only See base class member description: System.Attribute.TypeId When implemented in a derived class, gets a unique identifier for this Attribute.
UnmanagedCode	Read-write Gets or sets a value indicating whether permission to call unmanaged code is declared.
Unrestricted (inherited from System.Security.Permissions.SecurityAttribute)	Read-write See base class member description: System.Security.Permissions.SecurityAttribute.Unrestricted Gets or sets a value indicating whether full (unrestricted) permission to the resource protected by the attribute is declared.

Public Methods

CreatePermission	Overridden: Creates and returns a new SecurityPermission.
Equals (inherited from System.Object)	See base class member description: System.Object.Equals Derived from System.Object, the primary base class for all objects.
GetHashCode (inherited from System.Attribute)	See base class member description: System.Attribute.GetHashCode Returns the hash code for this instance.
GetType (inherited from System.Object)	See base class member description: System.Object.GetType Derived from System.Object, the primary base class for all objects.
IsDefaultAttribute (inherited from System.Attribute)	See base class member description: System.Attribute.IsDefaultAttribute When overridden in a derived class, returns an indication whether the value of this instance is the default value for the derived class.
Match (inherited from System.Attribute)	See base class member description: System.Attribute.Match When overridden in a derived class, returns a value indicating whether this instance equals a specified object.
ToString (inherited from System.Object)	See base class member description: System.Object.ToString Derived from System.Object, the primary base class for all objects.

Protected Methods

Finalize (inherited from System.Object)	See base class member description: System.Object.Finalize Derived from System.Object, the primary base class for all objects.
MemberwiseClone (inherited from System.Object)	See base class member description: System.Object.MemberwiseClone Derived from System.Object, the primary base class for all objects.

Hierarchy:

• System.Object
• System.Attribute
• System.Security.Permissions.SecurityAttribute
• System.Security.Permissions.CodeAccessSecurityAttribute
• System.Security.Permissions.SecurityPermissionAttribute

System.Security.Permissions.SecurityPermissionAttribute Member Details

Summary

Initializes a new instance of the SecurityPermissionAttribute class with the specified SecurityAction.

C# Syntax:

public SecurityPermissionAttribute(    SecurityAction action );

action

One of the SecurityAction values.

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Inherited
See base class member description: System.Security.Permissions.SecurityAttribute.Action

Summary

Gets or sets a security action.

C# Syntax:

public SecurityAction Action {get; set;}

This property is inherited by all classes implementing custom attributes for declarative security.

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Summary

Gets or sets a value indicating whether permission to assert that all this code's callers have the requisite permission for the operation is declared.

C# Syntax:

public bool Assertion {get; set;}

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Summary

Gets or sets a value indicating whether permission to manipulate AppDomain is declared.

C# Syntax:

public bool ControlAppDomain {get; set;}

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Summary

Gets or sets a value indicating whether permission to alter or manipulate domain security policy is declared.

C# Syntax:

public bool ControlDomainPolicy {get; set;}

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Summary

Gets or sets a value indicating whether permission to alter or manipulate evidence is declared.

C# Syntax:

public bool ControlEvidence {get; set;}

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Summary

Gets or sets a value indicating whether permission to view and manipulate security policy is declared.

C# Syntax:

public bool ControlPolicy {get; set;}

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Summary

Gets or sets a value indicating whether permission to manipulate the current principal is declared.

C# Syntax:

public bool ControlPrincipal {get; set;}

For more information, see the conceptual topic at MSDN: principal.

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Summary

Gets or sets a value indicating whether permission to manipulate threads is declared.

C# Syntax:

public bool ControlThread {get; set;}

For more information, see Thread.

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Summary

Gets or sets a value indicating whether permission to execute code is declared.

C# Syntax:

public bool Execution {get; set;}

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Summary

Gets or sets all permission flags comprising the SecurityPermission permissions.

C# Syntax:

public SecurityPermissionFlag Flags {get; set;}

Exceptions

Exception Type	Condition
ArgumentException	An attempt is made to set this property to an invalid value. See SecurityPermissionFlag for the valid values.

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Summary

Gets or sets a value indicating whether code can plug into the common language runtime infrastructure, such as adding Remoting Context Sinks, Envoy Sinks and Dynamic Sinks.

C# Syntax:

public bool Infrastructure {get; set;}

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Summary

Gets or sets a value indicating whether code can configure remoting types and channels.

C# Syntax:

public bool RemotingConfiguration {get; set;}

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Summary

Gets or sets a value indicating whether code can use a serialization formatter to serialize or deserialize an object.

C# Syntax:

public bool SerializationFormatter {get; set;}

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Summary

Gets or sets a value indicating whether permission to bypass code verification is declared.

C# Syntax:

public bool SkipVerification {get; set;}

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Inherited
See base class member description: System.Attribute.TypeId

Summary

When implemented in a derived class, gets a unique identifier for this Attribute.

C# Syntax:

public virtual object TypeId {get;}

As implemented, this identifier is merely the Type of the attribute. However, it is intended that the unique identifier be used to identify two attributes of the same type.

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Summary

Gets or sets a value indicating whether permission to call unmanaged code is declared.

C# Syntax:

public bool UnmanagedCode {get; set;}

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Inherited
See base class member description: System.Security.Permissions.SecurityAttribute.Unrestricted

Summary

Gets or sets a value indicating whether full (unrestricted) permission to the resource protected by the attribute is declared.

C# Syntax:

public bool Unrestricted {get; set;}

This property is inherited by all classes implementing custom attributes for declarative security.

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Summary

Creates and returns a new SecurityPermission.

C# Syntax:

public override IPermission CreatePermission();

Return Value:

A SecurityPermission that corresponds to this attribute.

This method should only be called by the security system, never by application code.

At compile time, attributes convert security declarations to a serialized form in metadata. Declarative security data in metadata is created from the permission that this method returns that corresponds to this attribute.

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Inherited
See base class member description: System.Object.Equals

C# Syntax:

public virtual bool Equals(    object obj );

For more information on members inherited from System.Object click on the link above.

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Inherited
See base class member description: System.Object.Finalize

C# Syntax:

~SecurityPermissionAttribute();

For more information on members inherited from System.Object click on the link above.

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Inherited
See base class member description: System.Attribute.GetHashCode

Summary

Returns the hash code for this instance.

C# Syntax:

public override int GetHashCode();

Return Value:

A 32-bit signed integer hash code.

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Inherited
See base class member description: System.Object.GetType

C# Syntax:

public Type GetType();

For more information on members inherited from System.Object click on the link above.

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Inherited
See base class member description: System.Attribute.IsDefaultAttribute

Summary

When overridden in a derived class, returns an indication whether the value of this instance is the default value for the derived class.

C# Syntax:

public virtual bool IsDefaultAttribute();

Return Value:

true if this instance is the default attribute for the class; otherwise, false.

The default implementation of this class returns false, and must be implemented in the derived class to be useful to that class.

The implementation of this method in a derived class compares the value of this instance to a standard, default value obtained by some means, then returns a Boolean value that indicates whether the value of this instance is equal to the standard. The standard value is typically coded as a constant in the implementation, or stored programmatically in a field used by the implementation.

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Inherited
See base class member description: System.Attribute.Match

Summary

When overridden in a derived class, returns a value indicating whether this instance equals a specified object.

C# Syntax:

public virtual bool Match(    object obj );

obj

An Object to compare with this instance of Attribute.

Return Value:

true if this instance equals obj; otherwise, false.

This method determines if one Attribute equals another. Its default implementation is the same as Attribute.Equals, which performs a value and reference comparison. Override this method to implement support for attribute values, such as flags or bitfields, that consist of components that are meaningful in themselves. For example, consider an attribute whose value is a binary field divided into a bitfield of flags. Two instances of this attribute have one flag in set in common while all the other flags differ. The Equal method cannot determine that the two instances have the same flag set, but the Match method can.

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Inherited
See base class member description: System.Object.MemberwiseClone

C# Syntax:

protected object MemberwiseClone();

For more information on members inherited from System.Object click on the link above.

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Inherited
See base class member description: System.Object.ToString

C# Syntax:

public virtual string ToString();

For more information on members inherited from System.Object click on the link above.

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