SQL Server

PDF Signatures with Built-in SVG Graphics

See more PDF Signatures Examples

This example demonstrates the built-in SVG graphics that can be applied to the appearance when signing a PDF.

Note: This example requires Chilkat v9.5.0.85 or greater.

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

    -- Load a PDF to be signed.
    -- The "hello.pdf" is available at https://chilkatsoft.com/hello.pdf
    EXEC sp_OAMethod @pdf, 'LoadFile', @success OUT, 'qa_data/pdf/hello.pdf'
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @pdf, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @pdf
        RETURN
      END

    -- Options for signing are specified in JSON.
    DECLARE @json int
    EXEC @hr = sp_OACreate 'Chilkat.JsonObject', @json OUT

    -- In most cases, the signingCertificateV2 and signingTime attributes are required.
    EXEC sp_OAMethod @json, 'UpdateInt', @success OUT, 'signingCertificateV2', 1
    EXEC sp_OAMethod @json, 'UpdateInt', @success OUT, 'signingTime', 1

    -- Specify the location/position, scale, and content of the signature's appearance.
    EXEC sp_OAMethod @json, 'UpdateInt', @success OUT, 'page', 1
    EXEC sp_OAMethod @json, 'UpdateString', @success OUT, 'appearance.y', 'top'
    EXEC sp_OAMethod @json, 'UpdateString', @success OUT, 'appearance.x', 'left'
    EXEC sp_OAMethod @json, 'UpdateString', @success OUT, 'appearance.fontScale', '10.0'
    EXEC sp_OAMethod @json, 'UpdateString', @success OUT, 'appearance.text[0]', 'Digitally signed by: cert_cn'
    EXEC sp_OAMethod @json, 'UpdateString', @success OUT, 'appearance.text[1]', 'current_dt'
    EXEC sp_OAMethod @json, 'UpdateString', @success OUT, 'appearance.text[2]', 'The crazy brown fox jumps over the lazy dog.'

    -- In addition to the above, this example adds a built-in SVG graphic to the appearance.
    -- The built-in SVG graphic is specified by a name, such as "green-check-grey-circle".
    -- The full list of graphic names and images are shown below.
    EXEC sp_OAMethod @json, 'UpdateString', @success OUT, 'appearance.image', 'green-check-grey-circle'

    -- The graphic can be placed "left", "center", or "right".
    -- If "center", then the graphic is displayed behind the text.
    EXEC sp_OAMethod @json, 'UpdateString', @success OUT, 'appearance.imagePlacement', 'left'

    -- The graphic's opacity can range from 1 to 100.
    -- Centered graphics look best with less opacity (50 or less).
    -- In this example, we'll keep the opacity at 100.
    EXEC sp_OAMethod @json, 'UpdateString', @success OUT, 'appearance.imageOpacity', '100'

    -- Here's an example of the signature's appearance if we centered the SVG graphic with an opacity of 40%
    -- (image:https://example-code.com/images/centered_svg.jpg/endImage)

    -- Load the signing certificate. (Use your own certificate.)
    DECLARE @cert int
    EXEC @hr = sp_OACreate 'Chilkat.Cert', @cert OUT

    EXEC sp_OAMethod @cert, 'LoadPfxFile', @success OUT, 'qa_data/pfx/myPdfSigningCert.pfx', 'secret'
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @cert, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @pdf
        EXEC @hr = sp_OADestroy @json
        EXEC @hr = sp_OADestroy @cert
        RETURN
      END

    -- Tell the pdf object to use the certificate for signing.
    EXEC sp_OAMethod @pdf, 'SetSigningCert', @success OUT, @cert
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @pdf, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @pdf
        EXEC @hr = sp_OADestroy @json
        EXEC @hr = sp_OADestroy @cert
        RETURN
      END

    EXEC sp_OAMethod @pdf, 'SignPdf', @success OUT, @json, 'qa_output/hello_signed.pdf'
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @pdf, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @pdf
        EXEC @hr = sp_OADestroy @json
        EXEC @hr = sp_OADestroy @cert
        RETURN
      END


    PRINT 'The PDF has been successfully cryptographically signed.'

    -- The appearance of the signature appears in Adobe Acrobat as shown here:

    -- (image:https://example-code.com/images/pdf_signature_green_check_grey_circle.jpg/endImage)

    -- The SVG icon graphics are embedded within the Chilkat library, 
    -- and were graciously provided by uxwing - Free SVG Icons 
    -- 
    -- The uxwing licensing terms are reproduced here and can be verified at uxwing licensing

    -- Icons from uxwing.com are free (see https://uxwing.com/license/)
    -- 	- All icons on UXWing free to download, and use personal, commercial projects.
    -- 	- Attribution and Credit is NOT required, however, any credit will be much appreciated.
    -- 	- There is no limit to the number of times you can use.
    -- 	- You may modify the resources according to your requirements.

    -- The set of SVG names and the corresponding graphics are shown below.
    -- 
    -- For example, if we specify "green-check-green-circle"
    EXEC sp_OAMethod @json, 'UpdateString', @success OUT, 'appearance.image', 'green-check-green-circle'
    -- We get:
    -- (image:https://example-code.com/images/green-check-green-circle.jpg/endImage)

    -- "application-approved"
    -- (image:https://example-code.com/images/application-approved.jpg/endImage)

    -- "application-rejected"
    -- (image:https://example-code.com/images/application-rejected.jpg/endImage)

    -- "document-accepted"
    -- (image:https://example-code.com/images/document-accepted.jpg/endImage)

    -- "approved"
    -- (image:https://example-code.com/images/approved.jpg/endImage)

    -- "blue-check-mark"
    -- (image:https://example-code.com/images/blue-check-mark.jpg/endImage)

    -- "green-check-mark"
    -- (image:https://example-code.com/images/green-check-mark.jpg/endImage)

    -- "green-check-grey-circle"
    -- (image:https://example-code.com/images/green-check-grey-circle.jpg/endImage)

    -- "red-x-red-circle"
    -- (image:https://example-code.com/images/red-x-red-circle.jpg/endImage)

    -- "rejected"
    -- (image:https://example-code.com/images/rejected.jpg/endImage)

    -- "result-failure"
    -- (image:https://example-code.com/images/result-failure.jpg/endImage)

    -- "result-pass"
    -- (image:https://example-code.com/images/result-pass.jpg/endImage)

    -- "signature"
    -- (image:https://example-code.com/images/signature.jpg/endImage)

    -- "document-check"
    -- (image:https://example-code.com/images/document-check.jpg/endImage)

    -- "document-x"
    -- (image:https://example-code.com/images/document-x.jpg/endImage)

    -- "red-x-grey-circle"
    -- (image:https://example-code.com/images/red-x-grey-circle.jpg/endImage)

    EXEC @hr = sp_OADestroy @pdf
    EXEC @hr = sp_OADestroy @json
    EXEC @hr = sp_OADestroy @cert


END
GO