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 |
|---|---|
|
Operation completed successfully. |
|
Invalid parameter. |
|
A bad pointer was passed in. |
|
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