How can I add an AcroForm signature block in a PDF using jsPDF? Is this a current feature? I couldn't find it in the docs. To be clear, I'd like to be able to digitally sign this block in the PDF.
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I have an app in which some PDF files are downloaded and my problem is simple : I need to have the ability to sign them (drawing signature on screen) anywhere and save it to PDF format without modifying the structure of my PDF file.
The new feature in iOS 9 : Markup in the mail app does EXACTLY what I need. However, I don't want to use Mail in my app...
I've found on the web some ways to Generate PDF content, but very few examples and nothing that could help me with my problem.
Opening a PDF, turning it into NSData, create a context to render the signature then render both the PDF and the layered signature to finally save the NSData to PDF seems to be a pain, isn't it ?
Can someone help me either
Use markup features without using mail app or use it as transparent as possible for the user
Or, any reliable tutorial to draw signature over PDF without using a third-party app ?
Thank you,
I am generating pdf using wicked_pdf and I am also using prawntable for pdfs which needs to be password protected. Since wicked pdf doesnt supports password protected pdf generation.
Is there any way to add a digital signature which is in .pfx format to pdf.?
Passwording pdf files vs digitally signing them
Passwording a pdf file encrypts the file. You will need to find a pdf library/toolkit to do that for you. If you can't find one with a ruby API, then you can call it as a command from ruby. The latter is not as elegant but works fine. (Be sure to catch and handle errors.)
Digitally signing a pdf is completely different than encryption. The result of signing is a pdf with one or more digital signatures. You use either a library to sign a file locally or, for a more dependable system, sign the file via a dedicated appliance that also holds the signer's private key and certificate.
Unlike password protection/encryption, anyone who receives a digitally signed pdf file can read the file's content. The digital signatures provide the relying party (the recipient) with assurances about:
the identity of the person who signed the file
the integrity of the file (confirming that it wasn't changed since signing)
the non-reputability of the file (confirming that the signer can't claim that they hadn't signed the file)
An important issue is that having a signer's private key on the file system of a regular computer/server is not secure enough to provide any guarantee against repudiation by the signer--she could truthfully say that there is no way to assure that her "signature" was not forged by un-authorized use of the pfx file.
The Origami library has a very basic support for PDF digital signatures and there is sample code for this at https://github.com/gdelugre/origami/blob/master/examples/signature/signature.rb.
I am using UIGraphicsBeginPDFContextToFile to create a PDF in an iPad app. The file is encrypted using a password. I would like to set the PDF Print Dialog Presets in particular DuplexMode so that the document will default to duplex printing. I assume I should be using kCGPDFContextKeywords to set DuplexMode to DuplexFlipLongEdge.
Can someone provide an example of how this is done.
It cannot be done using the standard iOS PDF API. The auxiliary dictionary keys are a fixed set that support only setting some document information and the password.
There is no support for setting the DuplexMode.
I am looking to be able to open a pdf file (done) and then be able to use the touch screen to sign the pdf and then save it with the modification. From what i have read this is no easy task, and i have no idea where to begin. Any of you know any tutorials or frameworks that will help me with this ?
Also if possible being able to modify fields of a pdf file, on the desktop the pdf can have fields you can click on then type in to fill out the form, without the need to ever print. If this is possible as well that would be perfect.
Thanks.
Maybe libHaru (http://libharu.org/wiki/Main_Page) does what you want, it's worth a try.
Does your starting point have to be a PDF? steipete's suggestion of using a system to create the PDF would work if your app workflow could create the PDF (sans signature) and display it, the user "signs" it in your app, and you create the PDF again this time with the signature embedded. It depends on whether this flow is an option for your app. Often it seems easier if you treat PDF as a final document and produce the PDF in it's final form each time (final meaning that you're not going to try modifying it).
I've been using Delphi and the Adobe Acrobat 9 API. I'm simply opening a PDF and printing it, followed by closing it without saving anything.
I'm having an issue while opening some PDFs though. If the PDF is password protected the Open method displays Adobe's "Input password" prompt. My application is running in an automated fashion, and therefor cannot proceed beyond this password prompt until somebody clicks cancel.
I've been looking for something that will either notify me that the file is password protected prior to opening it, or a parameter or something that will skip password protected files. I need my program to assume it cannot open any passworded PDF.
How about detecting whether the PDF is secured first before trying to open it?
I had a similar issue where I needed to find out if printing was allowed before doing a print commnad on the PDF. The API does not complain and the print function returns success even though the PDF file does not allow for printing.
I wrote a solution a while back by writing an Adobe plug in. If it's not out-of-the box, you 'll need to write a plug in.