P7M Extractor

A simple class that allows to extract the original file from a signed p7m file.

Requirements

• PHP 7.0+
• Symphony Prcess 3.3 or 4.0+

Requirements

Behind the scenes this package leverages openssl. You can verify if the binary installed on your system by issueing this command:

which openssl

If it is installed it will return the path to the binary.

Installation

You can install the package via composer:

composer require filippo-toso/p7m-extractor

Usage

Extracting text from a pdf is easy.

use FilippoToso\P7MExtractor\P7M;

$success = (new P7M())
    ->setSource('source.pdf.p7m')
    ->setDestination('destination.pdf')
    ->save();

Or easier:

use FilippoToso\P7MExtractor\P7M;

$success = P7M::convert('source.pdf.p7m', 'destination.pdf');

By default the package will assume that the openssl command is located at /usr/bin/openssl. If it is located elsewhere pass its binary path to constructor

use FilippoToso\P7MExtractor\P7M;

$success = (new P7M('/custom/path/to/openssl'))
    ->setSource('source.pdf.p7m')
    ->setDestination('destination.pdf')
    ->save();

or as the last parameter to the extract() static method:

$success = P7M::convert('source.pdf.p7m', 'destination.pdf', '/custom/path/to/openssl');

If you want to get the content as a string instead of saving it to a file you can use the get() method or the extract() static method.

If you need to change the command or add additional parameters to openssl, you can use the setParams() methods

use FilippoToso\P7MExtractor\P7M;

$success = (new P7M('/custom/path/to/openssl'))
    ->setParams(['{$openssl}', 'cms', '-verify', '-noverify', '-no_attr_verify', '-binary', '-in', '{$source}', '-inform', 'DER', '-out', '{$destination}'])
    ->setSource('source.pdf.p7m')
    ->setDestination('destination.pdf')
    ->save();

The {$openssl}, {$source}, {$destination} tokens are replace dinamically with the openssl executable, source and destination paths.