IX509AttributeExtensions::InitializeDecode method (certenroll.h)

Article
02/22/2024

The InitializeDecode method initializes the object from a Distinguished Encoding Rules (DER) encoded byte array that contains the attribute value. The byte array is represented by a Unicode-encoded string.

Syntax

HRESULT InitializeDecode(
  [in] EncodingType Encoding,
  [in] BSTR         strEncodedData
);

Parameters

[in] Encoding

An EncodingType enumeration value that specifies the type of Unicode encoding applied to the input string.

[in] strEncodedData

A BSTR variable that contains the encoded extensions.

Return value

If the function succeeds, the function returns S_OK.

If the function fails, it returns an HRESULT value that indicates the error. For a list of common error codes, see Common HRESULT Values.

Remarks

The object identifier (OID) for this attribute is XCN_OID_RSA_certExtensions (1.2.840.113549.1.9.14). For more information, see CERTENROLL_OBJECTID.

You can use this method if you have a DER-encoded ASN.1 object that contains an attribute value. You must supply the DER-encoded object in a Unicode encoded string. For more information, see the IBinaryConverter interface.

You must call either InitializeEncode or InitializeDecode before you can use an IX509AttributeExtensions object. The two methods complement each other. The InitializeEncode method enables you to construct an encoded Abstract Syntax Notation One (ASN.1) structure from raw data, and the InitializeDecode method enables you to initialize raw data from an encoded ASN.1 structure that contains the certificate extensions. You can call the X509Extensions property to retrieve the extensions.

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