IOpcSignaturePartReference::GetDigestValue method (msopc.h)

Article
02/22/2024

Gets the digest value that is calculated for part content of the referenced part when the part is signed.

Syntax

HRESULT GetDigestValue(
  [out] UINT8  **digestValue,
  [out] UINT32 *count
);

Parameters

[out] digestValue

A pointer to a buffer that contains the digest value that is calculated using the specified digest method; the method is applied to part content of the referenced part when the part is signed.

[out] count

The size of the digestValue buffer.

If the referenced part has not been signed yet, count is 0.

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_POINTER	At least one of the digestValue, and count parameters is NULL.

Remarks

This method allocates memory used by the buffer returned in digestValue. If the method succeeds, call the CoTaskMemFree function to free the memory.

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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