SQL Server

PC/SC List Smart Card Readers (and USB Tokens)

See more SCard Examples

Demonstrates how to list the smart card readers and USB tokens connected to the computer.

Note: This functionality was introduced in Chilkat v9.5.0.87.

SQL Server

-- Important: See this note about string length limitations for strings returned by sp_OAMethod calls.
--
CREATE PROCEDURE ChilkatSample
AS
BEGIN
    DECLARE @hr int
    -- Important: Do not use nvarchar(max).  See the warning about using nvarchar(max).
    DECLARE @sTmp0 nvarchar(4000)
    DECLARE @success int
    SELECT @success = 0

    -- This example requires the Chilkat API to have been previously unlocked.
    -- See Global Unlock Sample for sample code.

    DECLARE @scard int
    EXEC @hr = sp_OACreate 'Chilkat.SCard', @scard OUT
    IF @hr <> 0
    BEGIN
        PRINT 'Failed to create ActiveX component'
        RETURN
    END

    -- First establish a context to the PC/SC Resource Manager
    EXEC sp_OAMethod @scard, 'EstablishContext', @success OUT, 'user'
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @scard, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @scard
        RETURN
      END

    DECLARE @stReaders int
    EXEC @hr = sp_OACreate 'Chilkat.StringTable', @stReaders OUT

    EXEC sp_OAMethod @scard, 'ListReaders', @success OUT, @stReaders
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @scard, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @scard
        EXEC @hr = sp_OADestroy @stReaders
        RETURN
      END

    DECLARE @numReaders int
    EXEC sp_OAGetProperty @stReaders, 'Count', @numReaders OUT
    DECLARE @i int
    SELECT @i = 0
    WHILE @i < @numReaders
      BEGIN

        EXEC sp_OAMethod @stReaders, 'StringAt', @sTmp0 OUT, @i
        PRINT @i + ': ' + @sTmp0
        SELECT @i = @i + 1
      END

    -- Sample output:
    -- 0: Alcor Micro USB Smart Card Reader 0
    -- 1: FS USB Token 0
    -- 2: FT Java Token 0
    -- 3: SCM Microsystems Inc. SCR33x USB Smart Card Reader 0
    -- 4: Yubico YubiKey OTP+FIDO+CCID 0

    -- Applications should always release the context when finished.
    EXEC sp_OAMethod @scard, 'ReleaseContext', @success OUT
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @scard, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
      END

    EXEC @hr = sp_OADestroy @scard
    EXEC @hr = sp_OADestroy @stReaders


END
GO