ISCardISO7816::Verify method

Article
01/07/2021

[The Verify 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 Verify method constructs an application protocol data unit (APDU) command that initiates the comparison (in the card) of the verification data sent from the interface device with the reference data stored in the card (for example, password).

Syntax

HRESULT Verify(
  [in]      BYTE         byRefCtrl,
  [in]      LPBYTEBUFFER pData,
  [in, out] LPSCARDCMD   *ppCmd
);

Parameters

byRefCtrl [in]

A quantifier of the reference data. Coding of the reference control P2 follows.

When the body is empty, the command may be used either to retrieve the number 'X' of further allowed retries (SW1-SW2=63CX) or to check whether the verification is not required (SW1-SW2=9000).

Value	Meaning
No Info	Bit position: 00000000 P2=00 is reserved to indicate that no particular qualifier is used in those cards where the verify command references the secret data unambiguously.
Global Ref	Bit position: 0------- An example of Global Ref would be a password.
Specific Ref	Bit position: 1------- An example of Specific Ref is DF specific password.
RFU	Bit position: -xx-----
Ref Data #	Bit position: ---xxxxx The reference data number may be, for example, a password number or a short EF identifier.

pData [in]

A pointer to the verification data. This parameter can be NULL. The default value is NULL.

ppCmd [in, out]

On input, a pointer to an ISCardCmd interface object or NULL.

On return, it is filled with the APDU command constructed by this operation. If ppCmd was set to NULL, a smart card ISCardCmd object is internally created and returned by using the ppCmd pointer.

Return value

The method returns one of the following possible values.

Return code	Description
S_OK	The operation completed successfully.
E_INVALIDARG	A parameter that is not valid was used.
E_POINTER	A bad pointer was passed in.
E_OUTOFMEMORY	Out of memory.

Remarks

The security status may be modified as a result of a comparison. Unsuccessful comparisons may be recorded in the card (for example, to limit the number of further attempts of the use of the reference data).

For a list of all the methods provided by this interface, see ISCardISO7816.

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
Header	Scardssp.h
Type library	Scardsrv.tlb
DLL	Scardssp.dll
IID	IID_ISCardISO7816 is defined as 53B6AA68-3F56-11D0-916B-00AA00C18068