#How to create an electronic signature with symfony pdf

In case you want to sign the PDF with a public key, you need to provide as 5th and last parameter an array with 2 keys: The binary encryption key is derived from a password provided by the user.Ī encrypted PDF with RSA 40 bit should be created with: $pdf->SetProtection($permissions,'PasswordForUsers','MyMasterPassword',0) 5. PDF encryption internally works with encryption keys of 40, 128, or 256 bit depending on the PDF version.

#How to create an electronic signature with symfony full

The master (owner) password, if different from the user one, can be used to get full document access in case you want to revocate any of the removed permissions in any PDF viewer. The previous image shows a PDF with password trying to be viewed in the Chrome PDF Viewer. Use null or '' as value to don't use any password for the user. The second parameter is meant to be the password that every user should provide everytime he tries to open the PDF in any PDF viewer. The following code should prevent a PDF from being printed or modified: $pdf->SetProtection(array('print','modify')) 2.

owner : (inverted logic - only for public-key) when set permits change of encryption and enables all other permissions.

When this is not set, printing is limited to a low-level representation of the appearance, possibly of degraded quality. print-high : Print the document to a representation from which a faithful digital copy of the PDF content could be generated.assemble : Assemble the document (insert, rotate, or delete pages and create bookmarks or thumbnail images), even if 'modify' is not set.extract : Extract text and graphics (in support of accessibility to users with disabilities or for other purposes).fill-forms : Fill in existing interactive form fields (including signature fields), even if 'annot-forms' is not specified.annot-forms : Add or modify text annotations, fill in interactive form fields, and, if 'modify' is also set, create or modify interactive form fields (including signature fields).copy : prevent the copy or otherwise extract text and graphics from the document.modify : prevent the modification of contents of the document by operations other than those controlled by 'fill-forms', 'extract' and 'assemble'.print : disable the possibility to print the PDF from any PDF viewer.The first parameter is meant to be an array of strings with identifiers as content that indicates which permissions should be removed from the PDF. The SetProtection method expects up to 5 parameters: 1.

You can extend the execution time increasing the time limit using set_time_limit($seconds) or changing the value in the php.ini file. This can cause a PHP time-out in some cases, especially if the document contains images or fonts. Note: protecting a document requires to encrypt it, which increases the processing time a lot.