(SQL Server) Italian FatturaPA (e-Invoice) Signed XML (CADES-BES P7M) using USB SmartCard Reader

Demonstrates Italian e-Invoice (FatturaPA) signing by using a private key stored on a USB smartcard reader.

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
    -- Important: Do not use nvarchar(max).  See the warning about using nvarchar(max).
    DECLARE @sTmp0 nvarchar(4000)
    -- This example assumes the Chilkat API to have been previously unlocked.
    -- See Global Unlock Sample for sample code.

    DECLARE @crypt int
    -- Use "Chilkat_9_5_0.Crypt2" for versions of Chilkat < 10.0.0
    EXEC @hr = sp_OACreate 'Chilkat.Crypt2', @crypt OUT
    IF @hr <> 0
    BEGIN
        PRINT 'Failed to create ActiveX component'
        RETURN
    END

    EXEC sp_OASetProperty @crypt, 'VerboseLogging', 1

    DECLARE @cert int
    -- Use "Chilkat_9_5_0.Cert" for versions of Chilkat < 10.0.0
    EXEC @hr = sp_OACreate 'Chilkat.Cert', @cert OUT

    -- Use your smart card user PIN for signing.
    EXEC sp_OASetProperty @cert, 'SmartCardPin', '0000'

    DECLARE @success int
    EXEC sp_OAMethod @cert, 'LoadFromSmartcard', @success OUT, ''
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @cert, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @crypt
        EXEC @hr = sp_OADestroy @cert
        RETURN
      END

    EXEC sp_OAMethod @crypt, 'SetSigningCert', @success OUT, @cert
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @crypt, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @crypt
        EXEC @hr = sp_OADestroy @cert
        RETURN
      END

    -- The CadesEnabled property applies to all methods that create PKCS7 signatures. 
    -- To create a CAdES-BES signature, set this property equal to true.
    EXEC sp_OASetProperty @crypt, 'CadesEnabled', 1

    EXEC sp_OASetProperty @crypt, 'HashAlgorithm', 'sha256'

    DECLARE @signedAttrs int
    -- Use "Chilkat_9_5_0.JsonObject" for versions of Chilkat < 10.0.0
    EXEC @hr = sp_OACreate 'Chilkat.JsonObject', @signedAttrs OUT

    EXEC sp_OAMethod @signedAttrs, 'UpdateInt', @success OUT, 'contentType', 1
    EXEC sp_OAMethod @signedAttrs, 'UpdateInt', @success OUT, 'signingTime', 1
    EXEC sp_OAMethod @signedAttrs, 'UpdateInt', @success OUT, 'messageDigest', 1
    EXEC sp_OAMethod @signedAttrs, 'UpdateInt', @success OUT, 'signingCertificateV2', 1
    EXEC sp_OAMethod @signedAttrs, 'Emit', @sTmp0 OUT
    EXEC sp_OASetProperty @crypt, 'SigningAttributes', @sTmp0

    -- Load XML such as the following:
    --  <p:FatturaElettronica xmlns:p="http://ivaservizi.agenziaentrate.gov.it/docs/xsd/fatture/v1.2" versione="FPR12">
    --     <FatturaElettronicaHeader>
    --        <DatiTrasmissione>
    -- 	...
    --        </DatiTrasmissione>
    --        <CedentePrestatore>
    -- 	...
    --        </CedentePrestatore>
    --        <CessionarioCommittente>
    -- 	...
    --        </CessionarioCommittente>
    --     </FatturaElettronicaHeader>
    --     <FatturaElettronicaBody>
    --        <DatiGenerali>
    --           <DatiGeneraliDocumento>
    -- 		...
    --           </DatiGeneraliDocumento>
    --        </DatiGenerali>
    --        <DatiBeniServizi>
    -- 	...
    --        </DatiBeniServizi>
    --     </FatturaElettronicaBody>
    --  </p:FatturaElettronica>

    DECLARE @inputXmlPath nvarchar(4000)
    SELECT @inputXmlPath = 'c:/someDir/e-Invoice.xml'
    DECLARE @outputP7mPath nvarchar(4000)
    SELECT @outputP7mPath = 'c:/someDir/signed.p7m'

    -- Create the CAdES-BES attached signature, which contains the original data.
    EXEC sp_OAMethod @crypt, 'CreateP7M', @success OUT, @inputXmlPath, @outputP7mPath
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @crypt, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @crypt
        EXEC @hr = sp_OADestroy @cert
        EXEC @hr = sp_OADestroy @signedAttrs
        RETURN
      END


    PRINT 'Success.'

    EXEC @hr = sp_OADestroy @crypt
    EXEC @hr = sp_OADestroy @cert
    EXEC @hr = sp_OADestroy @signedAttrs


END
GO