Laravel pad signature

A Laravel package to sign documents and optionally generate
certified PDFs associated to a Eloquent model.

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Requirements

Laravel pad signature requires PHP 8.0 or 8.1 and Laravel 8 or 9.

Installation

You can install the package via composer:

composer require creagia/laravel-sign-pad

Publish the config and the migration files and migrate the database

php artisan sign-pad:install

Publish the .js assets:

php artisan vendor:publish --tag=sign-pad-assets

This will copy the package assets inside the public/vendor/sign-pad/ folder.

Configuration

In the published config file config/sign-pad.php you’ll be able to configure many important aspects of the package, like the route name where users will be redirected after signing the document or where do you want to store the signed documents.

Notice that the redirect_route_name will receive the parameter $uuid with the uuid of the signature model in the database.

Preparing your model

Add the RequiresSignature trait and implement the CanBeSigned class to the model you would like.

<?php

namespace App\Models;

use Creagia\LaravelSignPad\Concerns\RequiresSignature;
use Creagia\LaravelSignPad\Contracts\CanBeSigned;

class MyModel extends Model implements CanBeSigned
{
    use RequiresSignature;

}

?>

If you want to generate PDF documents with the signature, you should implement the ShouldGenerateSignatureDocument class . Define your document template with the getSignatureDocumentTemplate method.

<?php

namespace App\Models;

use Creagia\LaravelSignPad\Concerns\RequiresSignature;
use Creagia\LaravelSignPad\Contracts\CanBeSigned;
use Creagia\LaravelSignPad\Contracts\ShouldGenerateSignatureDocument;
use Creagia\LaravelSignPad\Templates\BladeDocumentTemplate;
use Creagia\LaravelSignPad\Templates\PdfDocumentTemplate;

class MyModel extends Model implements CanBeSigned, ShouldGenerateSignatureDocument
{
    use RequiresSignature;
    
    public function getSignatureDocumentTemplate(): SignatureDocumentTemplate
    {
        return new SignatureDocumentTemplate(
            signaturePage: 1,
            signatureX: 20,
            signatureY: 25,
            outputPdfPrefix: 'document', // optional
            // template: new BladeDocumentTemplate('pdf/my-pdf-blade-template'), // Uncomment for Blade template
            // template: new PdfDocumentTemplate(storage_path('pdf/template.pdf')), // Uncomment for PDF template
        );
    }
}

?>

A $model object will be automatically injected into the Blade template, so you will be able to access all the needed properties of the model.

Usage

At this point, all you need is to create the form with the sign pad canvas in your template. For the route of the form, you have to call the method getSignatureUrl() from the instance of the model you prepared before:

@if (!$myModel->hasBeenSigned())
    <form action="" method="POST">
        @csrf
        <div style="text-align: center">
            <x-creagia-signature-pad />
        </div>
    </form>
    <script src=""></script>
@endif

Retrieving signatures

You can retrieve your model signature using the Eloquent relation $myModel->signature. After that,
you can use

• getSignatureImagePath() method in the relation to get the signature image.
• getSignedDocumentPath() method in the relation to get the generated PDF document.

echo $myModel->signature->getSignatureImagePath();
echo $myModel->signature->getSignedDocumentPath();

Customizing the component

From the same template, you can change the look of the component by passing some properties:

• border-color (hex) to change the border color of the canvas
• pad-classes and button-classes (strings) indicates which classes will have the sign area or the submit & clear buttons
• clear-name and submit-name (strings) allows you to modify de default “Submit” and “Clear” values of the buttons.

An example with an app using Tailwind would be:

  <x-creagia-signature-pad
      border-color="#eaeaea"
      pad-classes="rounded-xl border-2"
      button-classes="bg-gray-100 px-4 py-2 rounded-xl mt-4"
      clear-name="Clear"
      submit-name="Submit"
  />

Certifying the PDFs

To certify your signature with TCPDF, you will have to create your own SSL certificate with OpenSSL. Otherwise you can
find the TCPDF demo certificate
here : TCPDF Demo Certificate

To create your own certificate use this command :

cd storage/app
openssl req -x509 -nodes -days 365000 -newkey rsa:1024 -keyout certificate.crt -out certificate.crt

More information in the TCPDF documentation

After generating the certificate, you’ll have to change the value of the variable certify_documents in the config/sign-pad.php file and set it to true.

When the variable certify_documents is set to true, the package will search the file allocated in the certificate_file path to sign the documents. Feel free to modify the location or the name of certificate file by changing its value.

Inside the same config/sign-pad.php we encourage you to fill all the fields of the array certificate_info to be more specific with the certificate.

Finally, you can change the certificate type by modifying the value of the variable cert_type (by default 2). You can find more information about certificates types at TCPDF setSignature reference.