Module: Prawn

Defined in:
lib/prawn/security.rb

Defined Under Namespace

Classes: Document, Reference

Instance Method Summary collapse

Instance Method Details

#EncryptedPdfObject(obj, key, id, gen, in_content_stream = false) ⇒ Object

Like PdfObject, but returns an encrypted result if required. For direct objects, requires the object identifier and generation number from the indirect object referencing obj.



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# File 'lib/prawn/security.rb', line 198

def EncryptedPdfObject(obj, key, id, gen, in_content_stream=false)
  case obj
  when Array
    "[" << obj.map { |e|
        EncryptedPdfObject(e, key, id, gen, in_content_stream)
    }.join(' ') << "]"
  when Prawn::LiteralString
    # FIXME: encrypted?
    obj = obj.gsub(/[\\\n\(\)]/) { |m| "\\#{m}" }
    "(#{obj})"
  when Time
    # FIXME: encrypted?
    obj = obj.strftime("D:%Y%m%d%H%M%S%z").chop.chop + "'00'"
    obj = obj.gsub(/[\\\n\(\)]/) { |m| "\\#{m}" }
    "(#{obj})"
  when String
    PdfObject(
      ByteString.new(Document::Security.encrypt_string(obj, key, id, gen)),
      in_content_stream)
  when Hash
    output = "<< "
    obj.each do |k,v|
      unless String === k || Symbol === k
        raise Prawn::Errors::FailedObjectConversion,
          "A PDF Dictionary must be keyed by names"
      end
      output << PdfObject(k.to_sym, in_content_stream) << " " <<
                EncryptedPdfObject(v, key, id, gen, in_content_stream) << "\n"
    end
    output << ">>"
  when Prawn::NameTree::Value
    PdfObject(obj.name) + " " +
      EncryptedPdfObject(obj.value, key, id, gen, in_content_stream)
  else # delegate back to PdfObject
    PdfObject(obj, in_content_stream)
  end
end