SQL Server

ScMinidriver - Find and Load Certificate from Smart Card or USB Token

See more ScMinidriver Examples

Demonstrates how to find and load a specific certificate located on a smart card or USB token. 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 @scmd int
    EXEC @hr = sp_OACreate 'Chilkat.ScMinidriver', @scmd OUT
    IF @hr <> 0
    BEGIN
        PRINT 'Failed to create ActiveX component'
        RETURN
    END

    -- Reader names (smart card readers or USB tokens) can be discovered
    -- via List Readers or Find Smart Cards
    DECLARE @readerName nvarchar(4000)
    SELECT @readerName = 'SCM Microsystems Inc. SCR33x USB Smart Card Reader 0'
    EXEC sp_OAMethod @scmd, 'AcquireContext', @success OUT, @readerName
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @scmd, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @scmd
        RETURN
      END

    -- If successful, the name of the currently inserted smart card is available:

    EXEC sp_OAGetProperty @scmd, 'CardName', @sTmp0 OUT
    PRINT 'Card name: ' + @sTmp0

    -- If desired, perform regular PIN authentication with the smartcard.
    -- For more details about smart card PIN authentication, see the Smart Card PIN Authentication Example
    DECLARE @retval int
    EXEC sp_OAMethod @scmd, 'PinAuthenticate', @retval OUT, 'user', '000000'
    IF @retval <> 0
      BEGIN

        PRINT 'PIN Authentication failed.'
      END

    -- You can find a cerficate using any of the following certificate parts:
    -- "subjectDN" -- The full distinguished name of the cert.
    -- "subjectDN_withTags" -- Same as above, but in a format that includes the subject part tags, such as the "CN=" in "CN=something"
    -- "subjectCN" -- The common name part (CN) of the certificate's subject.
    -- "serial" -- The certificate serial number.
    -- "serial:issuerCN" -- The certificate serial number + the issuer's common name, delimited with a colon char.
    -- These are the same certificate parts that can be retrieved by listing certificates on the smart card (or USB token).
    -- See List Certificates on Smart Card Example
    DECLARE @certPart nvarchar(4000)
    SELECT @certPart = 'subjectCN'
    DECLARE @partValue nvarchar(4000)
    SELECT @partValue = 'PIVKey E42D60A759D39147A26E0AF2FB1183C5'

    -- If the certificate is found, it is loaded into the cert object.
    DECLARE @cert int
    EXEC @hr = sp_OACreate 'Chilkat.Cert', @cert OUT

    EXEC sp_OAMethod @scmd, 'FindCert', @success OUT, @certPart, @partValue, @cert
    IF @success = 0
      BEGIN

        PRINT 'Failed to find the certificate.'
      END
    ELSE
      BEGIN

        PRINT 'Successfully loaded the cert object from the smart card / USB token.'

        -- Note: When successful, the cert object is internally linked to the ScMinidriver object's authenticated session.
        -- The cert object can now be used to sign or do other cryptographic operations that occur on the smart card / USB token.
        -- If your application calls PinDeauthenticate or DeleteContext, the cert will no longer be able to sign on the smart card
        -- because the smart card ScMinidriver session will no longer be authenticated or deleted.
      END

    -- ...
    -- ...
    -- ...

    -- When finished with operations that required authentication, you may if you wish, deauthenticate the session.
    EXEC sp_OAMethod @scmd, 'PinDeauthenticate', @success OUT, 'user'
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @scmd, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
      END

    -- Delete the context when finished with the card.
    EXEC sp_OAMethod @scmd, 'DeleteContext', @success OUT
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @scmd, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
      END

    EXEC @hr = sp_OADestroy @scmd
    EXEC @hr = sp_OADestroy @cert


END
GO