Class: Decidim::Initiatives::PdfSignatureExample

Inherits:
Object
  • Object
show all
Defined in:
decidim-initiatives/app/services/decidim/initiatives/pdf_signature_example.rb

Overview

Example of service to add a signature to a pdf

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(args = {}) ⇒ PdfSignatureExample

Public: Initializes the service. pdf - The pdf document to be signed


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# File 'decidim-initiatives/app/services/decidim/initiatives/pdf_signature_example.rb', line 15

def initialize(args = {})
  @pdf = args.fetch(:pdf)
end

Instance Attribute Details

#pdf ⇒ Object

Returns the value of attribute pdf.


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# File 'decidim-initiatives/app/services/decidim/initiatives/pdf_signature_example.rb', line 11

def pdf
  @pdf
end

Instance Method Details

#signed_pdf ⇒ Object

Public: PDF signed using a new certificate generated by the service


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# File 'decidim-initiatives/app/services/decidim/initiatives/pdf_signature_example.rb', line 20

def signed_pdf
  @signed_pdf ||= StringIO.open(pdf) do |stream|
    parsed_pdf = Origami::PDF.read(stream)
    parsed_pdf.append_page do |page|
      page.add_annotation(signature_annotation)
      parsed_pdf.sign(
        certificate,
        key,
        method: "adbe.pkcs7.detached",
        annotation: signature_annotation,
        location: location,
        contact: contact,
        issuer: issuer
      )
    end
    extract_signed_pdf(parsed_pdf)
  end
end