PackageDigitalSignature Class

Represents a digital signature that is applied to a set of package parts and relationships.

Namespace:   System.IO.Packaging
Assembly:  WindowsBase (in WindowsBase.dll)


public class PackageDigitalSignature
public ref class PackageDigitalSignature 
type PackageDigitalSignature = class end
Public Class PackageDigitalSignature

Gets the X.509 certificate embedding option.


Gets or sets the XML digital signature.


Gets the PackagePart that contains the signature.


Gets the URI string that identifies the signature type. 


Gets the encrypted hash value of the .


Gets a collection of all the PackagePart objects signed with the signature.


Gets the list of the PackageRelationship parts that have been signed with the signature.


Gets the X.509 certificate of the signer.


Gets the date and time that the signature was created.


Gets the format of the date and time returned by the property.

System_CAPS_pubmethod Equals

Determines whether the specified object is equal to the current object.(Inherited from Object.)

System_CAPS_protmethod Finalize

Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection.(Inherited from Object.)

System_CAPS_pubmethod GetHashCode

Serves as the default hash function. (Inherited from Object.)

System_CAPS_pubmethod GetPartTransformList

Returns an ordered list of the Transform operations applied to a given part.

System_CAPS_pubmethod GetType

Gets the Type of the current instance.(Inherited from Object.)

System_CAPS_protmethod MemberwiseClone

Creates a shallow copy of the current Object.(Inherited from Object.)

System_CAPS_pubmethod ToString

Returns a string that represents the current object.(Inherited from Object.)

System_CAPS_pubmethod Verify

Verifies the digital signature against an X.509 certificate.

System_CAPS_pubmethod Verify

Verifies the digital signature against a given X.509 certificate.

A PackageDigitalSignature object is immutable and cannot be altered after it is created.

For security, a PackageDigitalSignature can be associated with parts within a Package. A PackageDigitalSignature incorporates an X.509 certificate that provides two features:

  • Identifies and authenticates the originator of the part.

  • Validates that the part has not been modified.

The digital signature does not preclude a part from being modified, but a validation check against the signature fails if the part has changed in any way. The application can then take appropriate action—for example, it can prevent the part from opening or it can notify the user that the part has been modified and is not secure.

For more information about package digital signatures, see the MSDN article Digital Signing Framework of the Open Packaging Conventions.

.NET Framework
Available since 3.0

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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