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IX509ExtensionAlternativeNames::InitializeEncode method (certenroll.h)

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The InitializeEncode method initializes the extension from an IAlternativeNames collection.

Syntax

HRESULT InitializeEncode(
  [in] IAlternativeNames *pValue
);

Parameters

[in] pValue

Pointer to an IAlternativeNames interface.

Return value

If the function succeeds, the function returns S_OK.

If the function fails, it returns an HRESULT value that indicates the error. Possible values include, but are not limited to, those in the following table. For a list of common error codes, see Common HRESULT Values.

Return code/value Description
HRESULT_FROM_WIN32(ERROR_ALREADY_INITIALIZED)
 The object is already initialized.

Remarks

The method associates the name collection with the XCN_OID_SUBJECT_ALT_NAME2 (2.5.29.17) object identifier (OID) and encodes it by using Distinguished Encoding Rules (DER).

You must call either InitializeEncode or InitializeDecode before you can use an IX509ExtensionAlternativeNames object. The two methods complement each other. The InitializeEncode method enables you to construct a DER-encoded Abstract Syntax Notation One (ASN.1) extension object from raw data, and the InitializeDecode method enables you to initialize the raw data from an encoded object.

You can retrieve the following properties for this extension:

  • The Critical property identifies whether the extension is critical. You can also specify this property.
  • The ObjectId property retrieves the OID.
  • The AlternativeNames property retrieves the collection of names (the raw extension data).

Requirements

Requirement Value
Minimum supported client Windows Vista [desktop apps only]
Minimum supported server Windows Server 2008 [desktop apps only]
Target Platform Windows
Header certenroll.h
DLL CertEnroll.dll

See also

IX509ExtensionAlternativeNames