ISCardAuth::GetChallenge method

[The GetChallenge method is available for use in the operating systems specified in the Requirements section. It is not available for use in Windows Server 2003 with Service Pack 1 (SP1) and later, Windows Vista, Windows Server 2008, and subsequent versions of the operating system. The Smart Card Modules provide similar functionality.]

The GetChallenge method returns a challenge from the smart card.

Syntax

HRESULT GetChallenge(
  [in, optional] LONG         lAlgoID,
  [in]           LONG         lLengthOfChallenge,
  [in]           LPBYTEBUFFER pParam,
  [in, out]      LPBYTEBUFFER *pBuffer
);

Parameters

lAlgoID [in, optional]

Algorithm to be used in the authentication process.

lLengthOfChallenge [in]

Maximum length of expected response.

pParam [in]

An IByteBuffer object containing vendor-specific parameters of the authentication process.

pBuffer [in, out]

On input, points to the buffer.

On output, contains the challenge data from the card.

Return value

The method returns one of the following possible values.

Return code	Description
S_OK	Operation completed successfully.
E_INVALIDARG	Invalid parameter.
E_POINTER	A bad pointer was passed in.
E_OUTOFMEMORY	Out of memory.

 

Remarks

For a list of all the methods provided by this interface, see ISCardAuth.

In addition to the COM error codes listed above, this interface may return a smart card error code if a smart card function was called to complete the request. For more information, see Smart Card Return Values.

Requirements

Requirement	Value
Minimum supported client	Windows XP [desktop apps only]
Minimum supported server	Windows Server 2003 [desktop apps only]
End of client support	Windows XP
End of server support	Windows Server 2003

See also

ISCardAuth