IOpcSignaturePartReferenceSet::Create method (msopc.h)

Article
10/13/2021

Creates an IOpcSignaturePartReference interface pointer that represents a reference to a part to be signed, and adds the new interface to the set.

Syntax

HRESULT Create(
  [in]          IOpcPartUri                 *partUri,
  [in]          LPCWSTR                     digestMethod,
  [in]          OPC_CANONICALIZATION_METHOD transformMethod,
  [out, retval] IOpcSignaturePartReference  **partReference
);

Parameters

[in] partUri

An IOpcPartUri that represents the part name of the part to be referenced.

[in] digestMethod

The digest method to be used for part content of the part to be referenced. To use the default digest method, pass NULL to this parameter.

Important The default digest method must be set by calling the IOpcSigningOptions::SetDefaultDigestMethod method before IOpcDigitalSignatureManager::Sign is called.

[in] transformMethod

The canonicalization method used for part content of the part to be referenced.

[out, retval] partReference

A new IOpcSignaturePartReference interface pointer that represents the reference to the part to be signed.

This parameter can be NULL if a pointer to the new interface is not needed.

Return value

The method returns an HRESULT. Possible values include, but are not limited to, those in the following table.

Return code	Description
S_OK	The method succeeded.
E_INVALIDARG	The value passed in the transformMethod parameter is not a valid OPC_CANONICALIZATION_METHOD enumeration value.
E_POINTER	The partUri parameter is NULL.

Remarks

Only parts that can be represented by the IOpcPart interface can be referenced by an IOpcSignaturePartReference interface pointer. Relationships parts are referenced for signing by a pointer to the IOpcSignatureRelationshipReference interface. To create an IOpcSignatureRelationshipReference interface pointer, call the IOpcSignatureRelationshipReferenceSet::Create method.

When an IOpcSignaturePartReference interface pointer is created and added to the set, the reference it represents is saved when the package is saved.

Thread Safety

Packaging objects are not thread-safe.

For more information, see the Getting Started with the Packaging API.

Requirements

Requirement	Value
Minimum supported client	Windows 7 [desktop apps only]
Minimum supported server	Windows Server 2008 R2 [desktop apps only]
Target Platform	Windows
Header	msopc.h

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