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(SQL Server) Find Certificate on Smartcard Currenty in Reader

Finds the certificates on smartcards currently in readers.

Note: This example requires Chilkat v9.5.0.77 or greater.

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

// Important: See this note about string length limitations for strings returned by sp_OAMethod calls.
//
CREATE PROCEDURE ChilkatSample
AS
BEGIN
    DECLARE @hr int
    DECLARE @iTmp0 int
    DECLARE @sTmp0 nvarchar(4000)
    -- This newer example is a much better way to get the certificate on a smartcard or USB token

    -- This example requires that we already know the name of the CSP (Cryptographic Service Provider) for the smartcard.
    -- It is often the "Microsoft Base Smart Card Crypto Provider".  You can see what CSP's are registered on your system with this code:

    DECLARE @csp int
    EXEC @hr = sp_OACreate 'Chilkat_9_5_0.Csp', @csp OUT
    IF @hr <> 0
    BEGIN
        PRINT 'Failed to create ActiveX component'
        RETURN
    END

    DECLARE @st int
    EXEC @hr = sp_OACreate 'Chilkat_9_5_0.StringTable', @st OUT

    DECLARE @success int
    EXEC sp_OAMethod @csp, 'GetProviders', @success OUT, @st
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @csp, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @csp
        EXEC @hr = sp_OADestroy @st
        RETURN
      END

    -- Iterate over the CSP names..
    DECLARE @i int
    SELECT @i = 0
    DECLARE @numProviders int
    EXEC sp_OAGetProperty @st, 'Count', @numProviders OUT
    WHILE @i < @numProviders
      BEGIN

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

    -- --------------------------
    -- This newer example is a much better way to get the certificate on a smartcard or USB token

    -- We'll assume our smartcard is accessed through the "Microsoft Base Smart Card Crypto Provider"
    -- Also, we'll assume that the certificate has been installed into the default current user Windows
    -- certificate store by following the instructions provided by the smartcard vendor.
    -- (The certificate does not contain the private key.  The certificate should be installed in the
    -- Windows current user certificate store.  It will also be on the smartcard, and the associated private
    -- key is only on the smartcard.)
    -- 

    -- First open the Current User Certificate Store.  We'll need it soon..
    DECLARE @certStore int
    EXEC @hr = sp_OACreate 'Chilkat_9_5_0.CertStore', @certStore OUT

    EXEC sp_OAMethod @certStore, 'OpenCurrentUserStore', @success OUT, 1
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @certStore, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @csp
        EXEC @hr = sp_OADestroy @st
        EXEC @hr = sp_OADestroy @certStore
        RETURN
      END

    -- Create a Csp object and set the ProviderName equal to our desired CSP name.
    -- (setting the ProviderName selects the desired CSP.)
    EXEC sp_OASetProperty @csp, 'ProviderName', 'Microsoft Base Smart Card Crypto Provider'

    -- Iterate over the key containers managed by this CSP.
    -- These will be the key containers for the cards currently inserted into the reader(s).
    -- If only one smartcard reader exists, and a smartcard is inserted, there should be one
    -- key container.
    DECLARE @numContainers int
    EXEC sp_OAGetProperty @csp, 'NumKeyContainers', @numContainers OUT


    PRINT 'numContainers = ' + @numContainers

    SELECT @i = 0
    WHILE @i < @numContainers
      BEGIN
        -- For each key container, get the key container name and then find the certificate
        -- in the Current User Certicate Store with the matching key container name.
        DECLARE @keyContainerName nvarchar(4000)
        EXEC sp_OAMethod @csp, 'NthKeyContainerName', @keyContainerName OUT, @i

        DECLARE @cert int
        EXEC sp_OAMethod @certStore, 'FindCertByKeyContainer', @cert OUT, @keyContainerName
        EXEC sp_OAGetProperty @certStore, 'LastMethodSuccess', @iTmp0 OUT
        IF @iTmp0 = 1
          BEGIN

            EXEC sp_OAGetProperty @cert, 'SubjectCN', @sTmp0 OUT
            PRINT 'Certificate in reader: ' + @sTmp0
            EXEC @hr = sp_OADestroy @cert

          END
        SELECT @i = @i + 1
      END

    EXEC @hr = sp_OADestroy @csp
    EXEC @hr = sp_OADestroy @st
    EXEC @hr = sp_OADestroy @certStore


END
GO

 

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