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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.

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Local $bSuccess = False

; This example requires the Chilkat API to have been previously unlocked.
; See Global Unlock Sample for sample code.

$oPdf = ObjCreate("Chilkat.Pdf")

; Load a PDF to be signed.
; The "hello.pdf" is available at https://chilkatsoft.com/hello.pdf
$bSuccess = $oPdf.LoadFile("qa_data/pdf/hello.pdf")
If ($bSuccess = False) Then
    ConsoleWrite($oPdf.LastErrorText & @CRLF)
    Exit
EndIf

; Options for signing are specified in JSON.
$oJson = ObjCreate("Chilkat.JsonObject")

; In most cases, the signingCertificateV2 and signingTime attributes are required.
$oJson.UpdateInt("signingCertificateV2",1)
$oJson.UpdateInt("signingTime",1)

; Specify the location/position, scale, and content of the signature's appearance.
$oJson.UpdateInt("page",1)
$oJson.UpdateString("appearance.y","top")
$oJson.UpdateString("appearance.x","left")
$oJson.UpdateString("appearance.fontScale","10.0")
$oJson.UpdateString("appearance.text[0]","Digitally signed by: cert_cn")
$oJson.UpdateString("appearance.text[1]","current_dt")
$oJson.UpdateString("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.
$oJson.UpdateString("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.
$oJson.UpdateString("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.
$oJson.UpdateString("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.)
$oCert = ObjCreate("Chilkat.Cert")
$bSuccess = $oCert.LoadPfxFile("qa_data/pfx/myPdfSigningCert.pfx","secret")
If ($bSuccess = False) Then
    ConsoleWrite($oCert.LastErrorText & @CRLF)
    Exit
EndIf

; Tell the pdf object to use the certificate for signing.
$bSuccess = $oPdf.SetSigningCert($oCert)
If ($bSuccess = False) Then
    ConsoleWrite($oPdf.LastErrorText & @CRLF)
    Exit
EndIf

$bSuccess = $oPdf.SignPdf($oJson,"qa_output/hello_signed.pdf")
If ($bSuccess = False) Then
    ConsoleWrite($oPdf.LastErrorText & @CRLF)
    Exit
EndIf

ConsoleWrite("The PDF has been successfully cryptographically signed." & @CRLF)

; 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"
$oJson.UpdateString("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)