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StrongNameIdentityPermission Class

Defines the identity permission for strong names. This class cannot be inherited.

System.Object
  System.Security.CodeAccessPermission
    System.Security.Permissions.StrongNameIdentityPermission

Namespace:  System.Security.Permissions
Assembly:  mscorlib (in mscorlib.dll)
[SerializableAttribute]
[ComVisibleAttribute(true)]
public sealed class StrongNameIdentityPermission : CodeAccessPermission

The StrongNameIdentityPermission type exposes the following members.

  NameDescription
Public methodStrongNameIdentityPermission(PermissionState)Initializes a new instance of the StrongNameIdentityPermission class with the specified PermissionState.
Public methodStrongNameIdentityPermission(StrongNamePublicKeyBlob, String, Version)Initializes a new instance of the StrongNameIdentityPermission class for the specified strong name identity.
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  NameDescription
Public propertyNameGets or sets the simple name portion of the strong name identity.
Public propertyPublicKeyGets or sets the public key blob that defines the strong name identity namespace.
Public propertyVersionGets or sets the version number of the identity.
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  NameDescription
Public methodAssertDeclares that the calling code can access the resource protected by a permission demand through the code that calls this method, even if callers higher in the stack have not been granted permission to access the resource. Using Assert can create security issues. (Inherited from CodeAccessPermission.)
Public methodCopyCreates and returns an identical copy of the current permission. (Overrides CodeAccessPermission.Copy().)
Public methodDemandForces a SecurityException at run time if all callers higher in the call stack have not been granted the permission specified by the current instance. (Inherited from CodeAccessPermission.)
Public methodDeny Obsolete. Prevents callers higher in the call stack from using the code that calls this method to access the resource specified by the current instance. (Inherited from CodeAccessPermission.)
Public methodEqualsDetermines whether the specified CodeAccessPermission object is equal to the current CodeAccessPermission. (Inherited from CodeAccessPermission.)
Public methodFromXmlReconstructs a permission with a specified state from an XML encoding. (Overrides CodeAccessPermission.FromXml(SecurityElement).)
Public methodGetHashCodeGets a hash code for the CodeAccessPermission object that is suitable for use in hashing algorithms and data structures such as a hash table. (Inherited from CodeAccessPermission.)
Public methodGetTypeGets the Type of the current instance. (Inherited from Object.)
Public methodIntersectCreates and returns a permission that is the intersection of the current permission and the specified permission. (Overrides CodeAccessPermission.Intersect(IPermission).)
Public methodIsSubsetOfDetermines whether the current permission is a subset of the specified permission. (Overrides CodeAccessPermission.IsSubsetOf(IPermission).)
Public methodPermitOnlyPrevents callers higher in the call stack from using the code that calls this method to access all resources except for the resource specified by the current instance. (Inherited from CodeAccessPermission.)
Public methodToStringCreates and returns a string representation of the current permission object. (Inherited from CodeAccessPermission.)
Public methodToXmlCreates an XML encoding of the permission and its current state. (Overrides CodeAccessPermission.ToXml().)
Public methodUnionCreates a permission that is the union of the current permission and the specified permission. (Overrides CodeAccessPermission.Union(IPermission).)
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Important noteImportant

Starting with the .NET Framework 4, identity permissions are not used.

In the .NET Framework versions 1.0 and 1.1, identity permissions cannot have an Unrestricted permission state value. In the .NET Framework version 2.0 and later, identity permissions can have any permission state value. This means that in version 2.0 and later versions, identity permissions have the same behavior as permissions that implement the IUnrestrictedPermission interface. That is, a demand for an identity always succeeds, regardless of the identity of the assembly, if the assembly has been granted full trust.

Use StrongNameIdentityPermission to confirm that the calling code is in a particular strong-named code assembly. Full demands for StrongNameIdentityPermission succeed only if all the assemblies in the stack have the correct evidence to satisfy the demand. Link demands that use the StrongNameIdentityPermissionAttribute attribute succeed only if the immediate caller has the correct evidence.

A strong name identity is based on a cryptographic public key called a binary large object (BLOB), which is optionally combined with the name and version of a specific assembly. The key defines a unique namespace and provides strong verification that the name is genuine, because the definition of the name must be in an assembly that is signed by the corresponding private key.

Note that the validity of the strong name key is not dependent on a trust relationship or on any certificate necessarily being issued for the key.

In the .NET Framework versions 1.0 and 1.1, demands on the identity permissions are effective even when the calling assembly is fully trusted. That is, even if the calling assembly has full trust, a demand for an identity permission fails if the assembly does not meet the demanded criteria. In the .NET Framework version 2.0 and later, demands for identity permissions are ineffective if the calling assembly has full trust. This ensures consistency for all permissions and eliminates the treatment of identity permissions as a special case.

For a complete description of strong names, see the StrongName reference page. For more information about strong-named assemblies, see Strong-Named Assemblies.

The StrongNameIdentityPermission class is used to define strong-name requirements for accessing the public members of a type. The StrongNameIdentityPermissionAttribute attribute can be used to define strong-name requirements at the assembly level. In the .NET Framework version 2.0 and later, you can also use the InternalsVisibleToAttribute attribute to specify that all nonpublic types in that assembly are visible to another assembly. For more information, see Friend Assemblies (C# and Visual Basic).

.NET Framework

Supported in: 4.5.1, 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.
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