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(SQL Server) Convert PDF to pdf.p7s (Digitally Signed)

Demonstrates how to convert a PDF into a .p7s file that contains the PDF within a PKCS7 signature (the .p7s format).

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 @sTmp0 nvarchar(4000)
    -- This example assumes the Chilkat API to have been previously unlocked.
    -- See Global Unlock Sample for sample code.

    DECLARE @crypt int
    EXEC @hr = sp_OACreate 'Chilkat_9_5_0.Crypt2', @crypt OUT
    IF @hr <> 0
    BEGIN
        PRINT 'Failed to create ActiveX component'
        RETURN
    END

    DECLARE @cert int
    EXEC @hr = sp_OACreate 'Chilkat_9_5_0.Cert', @cert OUT

    DECLARE @success int
    EXEC sp_OAMethod @cert, 'LoadPfxFile', @success OUT, 'qa_data/pfx/cert_test123.pfx', 'test123'
    IF @success <> 1
      BEGIN
        EXEC sp_OAGetProperty @cert, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @crypt
        EXEC @hr = sp_OADestroy @cert
        RETURN
      END

    -- Tell the crypt component to use this cert.
    EXEC sp_OAMethod @crypt, 'SetSigningCert', @success OUT, @cert
    IF @success <> 1
      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'

    -- We can sign any type of file, creating a .p7s as output.
    -- The .p7s contains the signature and also embeds the data of the file that is signed.
    DECLARE @inFile nvarchar(4000)
    SELECT @inFile = 'qa_data/pdf/sample.pdf'
    DECLARE @p7sFile nvarchar(4000)
    SELECT @p7sFile = 'qa_output/sample.pdf.p7s'

    -- -----------------------------------------------------------------------------------------
    -- Also see Chilkat's online tool to examine a .p7m and generate code to duplicate the .p7m
    -- -----------------------------------------------------------------------------------------

    -- Create the CAdES-BES attached signature, which contains the original data.
    -- Note: Chilkat's function naming is not accurate.  CreateP7M creates a PKCS7 signature where the signed file
    -- is contained within the signature.  CreateP7S creates a detached PKCS7 signature where the signed file
    -- is NOT contained within the signature.  We want the data to be contained in the signature, therefore
    -- we call CreateP7M even though we are naming our output file .p7s.
    EXEC sp_OAMethod @crypt, 'CreateP7M', @success OUT, @inFile, @p7sFile
    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

    -- Verify the .p7s file and extract the original file from the .p7s. 
    DECLARE @extractedToFilePath nvarchar(4000)
    SELECT @extractedToFilePath = 'qa_output/sample.pdf'
    EXEC sp_OAMethod @crypt, 'VerifyP7M', @success OUT, @p7sFile, @extractedToFilePath
    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


    PRINT 'Success!'

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


END
GO

 

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