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(PowerBuilder) PDF Sign Unsigned Signature FieldSee more PDF Signatures ExamplesDemonstrates how to sign a PDF's unsigned signature field. Note: This example requires Chilkat v9.5.0.85 or greater.
integer li_rc oleobject loo_Pdf integer li_Success oleobject loo_Json oleobject loo_Cert // This example requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. loo_Pdf = create oleobject // Use "Chilkat_9_5_0.Pdf" for versions of Chilkat < 10.0.0 li_rc = loo_Pdf.ConnectToNewObject("Chilkat.Pdf") if li_rc < 0 then destroy loo_Pdf MessageBox("Error","Connecting to COM object failed") return end if // Load a PDF containing an unsigned signature field. li_Success = loo_Pdf.LoadFile("qa_data/pdf/unsigned_sig_field/due_diligence.pdf") if li_Success = 0 then Write-Debug loo_Pdf.LastErrorText destroy loo_Pdf return end if // A PDF with an unsigned signature field appears in Adobe Acrobat as shown below. // (When the mouse pointer is hovered over the field, a tooltip will likely show a message // such as "Unsigned signature field (Click to sign)". // This example code will automatically find the unsigned signature field, // and signs using your certificate. It automatically sizes the text to the space alotted // for the signature. // Options for signing are specified in JSON. loo_Json = create oleobject // Use "Chilkat_9_5_0.JsonObject" for versions of Chilkat < 10.0.0 li_rc = loo_Json.ConnectToNewObject("Chilkat.JsonObject") // In most cases, the signingCertificateV2 and signingTime attributes are required. loo_Json.UpdateInt("signingCertificateV2",1) loo_Json.UpdateInt("signingTime",1) // We don't specify the page or a specific location because Chilkat will automatically // find the unsigned signature field and use its location and size and will scale the // signatures visual appearance (text + graphics) to the correct size required to fit. // We only need to indicate the desire to fill the unsigned signature field. loo_Json.UpdateBool("appearance.fillUnsignedSignatureField",1) // Starting in Chilkat v9.5.0.90, if a PDF contains multiple unsigned signature fields, // the field to be signed can be chosen by name: // To list unsigned signature fields, see this example: List PDF Unsigned Signature Fields loo_Json.UpdateString("unsignedSignatureField","doctor_signature") // Note: If the PDF document contains multiple unsigned signature fields, Chilkat will // sign the 1st one found. // In this example, the appearance of the digital signature will contain three lines: // 1) The signing certificate's common name // 2) The current date/time // 3) Some arbitrary text. // The keyword "cert_cn" is replaced with the Certificate's Subject Common Name. // The keyword "current_dt" is replaced with the current date/time. // Any number of appearance text lines can be added. loo_Json.UpdateString("appearance.text[0]","Digitally signed by: cert_cn") loo_Json.UpdateString("appearance.text[1]","current_dt") loo_Json.UpdateString("appearance.text[2]","The crazy brown fox jumps over the lazy dog.") // This signature will include one of the built-in SVG graphics (green-check-grey-circle). loo_Json.UpdateString("appearance.image","green-check-grey-circle") loo_Json.UpdateString("appearance.imagePlacement","left") // Load the signing certificate. (Use your own certificate.) loo_Cert = create oleobject // Use "Chilkat_9_5_0.Cert" for versions of Chilkat < 10.0.0 li_rc = loo_Cert.ConnectToNewObject("Chilkat.Cert") li_Success = loo_Cert.LoadPfxFile("qa_data/pfx/myPdfSigningCert.pfx","secret") if li_Success = 0 then Write-Debug loo_Cert.LastErrorText destroy loo_Pdf destroy loo_Json destroy loo_Cert return end if // Tell the pdf object to use the certificate for signing. li_Success = loo_Pdf.SetSigningCert(loo_Cert) if li_Success = 0 then Write-Debug loo_Pdf.LastErrorText destroy loo_Pdf destroy loo_Json destroy loo_Cert return end if li_Success = loo_Pdf.SignPdf(loo_Json,"qa_output/due_diligence_signed.pdf") if li_Success = 0 then Write-Debug loo_Pdf.LastErrorText destroy loo_Pdf destroy loo_Json destroy loo_Cert return end if Write-Debug "The PDF has been successfully cryptographically signed." // The appearance of the signature appears in Adobe Acrobat as shown below. destroy loo_Pdf destroy loo_Json destroy loo_Cert |
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