Origami – PDF library for Ruby

by Mr Me on January 22, 2013 in php

Origami is a ruby library for crating / editing and Managing PDF files. There is only less ruby PDF library which supports digital signature kind of feature in PDF.

Recently I have used Origami for signing a PDF document.

You can find the details of Origami library here.

Gem version of Origami library is also available in RubyGems

gem install origami

1	gem install origami

The full source is here.

Sample code to sign a PDF using Origami:

require 'origami'

&nbsp;

#method to execute a command using shell
def command?(command)
system("which #{ command} &gt; /dev/null 2&gt;&amp;1")
end

#I used qpdf to check a PDF status like whether it is linearized or xref-streamed, because Origami has no support for those kind of PDFs

raise unless command? 'qpdf'

input = "sample.pdf"

&nbsp;

mypdf = Origami::PDF.read input

&nbsp;

#code to convert linearized PDF
if mypdf.is_linearized?

command = "qpdf #{input} --normalize-content=y #{intermediate}"

system("#{ command} &gt; /dev/null ")

mypdf = Origami::PDF.read intermediate

end

&nbsp;

#code to convert xrefstreamed PDF

if mypdf.revisions.last.xrefstm.nil? == false

command = "qpdf #{input} --ignore-xref-streams #{intermediate}"

system("#{ command} &gt; /dev/null ")

mypdf = Origami::PDF.read intermediate
end

&nbsp;

#load certificate file

certificate_raw = File.read "server.crt"

certificate = OpenSSL::X509::Certificate.new certificate_raw

#load key file

key_raw = File.read "server.key"

key = OpenSSL::PKey::RSA.new key_raw

#signature image
imageobject = Origami::Graphics::ImageXObject.from_image_file('logo.jpg', 'jpg')
imageobject.Width = 100
imageobject.Height = 100

&nbsp;

myannot = Origami::Annotation::RichMedia.new
myannot.Rect = Origami::Rectangle[:llx =&gt; 120.0, :lly =&gt; 386.0, :urx =&gt; 190.0, :ury =&gt; 353.0]

&nbsp;

sigannot = Origami::Annotation::Widget::Signature.new
sigannot.Rect = Origami::Rectangle[:llx =&gt; 89.0, :lly =&gt; 386.0, :urx =&gt; 190.0, :ury =&gt; 353.0]
sigannot.Contents = "Hello World"
sigannot.Border = [ 1 , 1 , 1 ]

#add the signature page

page = Origami::Page.new
mypdf.append_page(page)
page.add_annot(sigannot)

&nbsp;

mypdf.sign(certificate, key,
:method =&gt; 'adbe.pkcs7.sha1',
:annotation =&gt; sigannot,
:location =&gt; "India",
:contact =&gt; "fred@security-labs.org",
:reason =&gt; "Proof of Concept by Sajith"
)

#save the output file

mypdf.save('OUT.pdf')

require 'origami'

#method to execute a command using shell

def command?(command)

system("which #{ command} > /dev/null 2>&1")

end

#I used qpdf to check a PDF status like whether it is linearized or xref-streamed, because Origami has no support for those kind of PDFs

raise unless command? 'qpdf'

input = "sample.pdf"

mypdf = Origami::PDF.read input

#code to convert linearized PDF

if mypdf.is_linearized?

command = "qpdf #{input} --normalize-content=y #{intermediate}"

system("#{ command} > /dev/null ")

mypdf = Origami::PDF.read intermediate

end

#code to convert xrefstreamed PDF

if mypdf.revisions.last.xrefstm.nil? == false

command = "qpdf #{input} --ignore-xref-streams #{intermediate}"

system("#{ command} > /dev/null ")

mypdf = Origami::PDF.read intermediate

end

#load certificate file

certificate_raw = File.read "server.crt"

certificate = OpenSSL::X509::Certificate.new certificate_raw

#load key file

key_raw = File.read "server.key"

key = OpenSSL::PKey::RSA.new key_raw

#signature image

imageobject = Origami::Graphics::ImageXObject.from_image_file('logo.jpg', 'jpg')

imageobject.Width = 100

imageobject.Height = 100

myannot = Origami::Annotation::RichMedia.new

myannot.Rect = Origami::Rectangle[:llx => 120.0, :lly => 386.0, :urx => 190.0, :ury => 353.0]

sigannot = Origami::Annotation::Widget::Signature.new

sigannot.Rect = Origami::Rectangle[:llx => 89.0, :lly => 386.0, :urx => 190.0, :ury => 353.0]

sigannot.Contents = "Hello World"

sigannot.Border = [ 1 , 1 , 1 ]

#add the signature page

page = Origami::Page.new

mypdf.append_page(page)

page.add_annot(sigannot)

mypdf.sign(certificate, key,

:method => 'adbe.pkcs7.sha1',

:annotation => sigannot,

:location => "India",

:contact => "fred@security-labs.org",

:reason => "Proof of Concept by Sajith"

)

#save the output file

mypdf.save('OUT.pdf')

3 Comments

3 Responses to “Origami – PDF library for Ruby”

Anele Ivanova February 1, 2013 at 11:40 am #

Hi,

Recently I came across some great articles on your site.
The other day, I was discussing (http://www.sajithmr.me/origami-pdf-library-for-ruby)with my colleagues and they suggested I submit an article of my own. Your site is just perfect for what I have written!
Would it be ok to submit the article? It is free of charge, of course!

Let me know what you think
Contact me at anelieivanova@gmail.com

Regards
Anele Ivanova

Reply
- Mr Me February 13, 2013 at 11:59 am #
  
  You want to submit your article in my blog ? is that the question ?
  
  Reply
  - Aidan February 21, 2013 at 4:30 am #
    
    Just delete it, it’s blog spam: google.com/search?q=”Would+it+be+ok+to+submit+the+article”
    
    Reply