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Create signed URLs with a limited lifetime

This package can create URLs with a limited lifetime. This is done by adding an expiration date and a signature to the URL.

$urlSigner = new Sha256UrlSigner('randomkey');

$urlSigner->sign('https://myapp.com', 30);

// => The generated url will be valid for 30 seconds

This will output a URL that looks like https://myapp.com/?expires=xxxx&signature=xxxx.

Imagine mailing this URL out to the users of your application. When a user clicks on a signed URL your application can validate it with:

// returns `true` if valid, `false` if not
$urlSigner->validate('https://myapp.com/?expires=xxxx&signature=xxxx');

Support us

We invest a lot of resources into creating best in class open source packages. You can support us by buying one of our paid products.

We highly appreciate you sending us a postcard from your hometown, mentioning which of our package(s) you are using. You'll find our address on our contact page. We publish all received postcards on our virtual postcard wall.

Postcardware

You're free to use this package (it's MIT-licensed), but if it makes it to your production environment we highly appreciate you sending us a postcard from your hometown, mentioning which of our package(s) you are using.

Our address is: Spatie, Kruikstraat 22, 2018 Antwerp, Belgium.

All postcards are published on our website.

Installation

The package can installed via Composer:

composer require spatie/url-signer

Usage

A signer-object can sign URLs and validate signed URLs. A secret key is used to generate signatures.

use Spatie\UrlSigner\Sha256UrlSigner;

$urlSigner = new Sha256UrlSigner('mysecretkey');

Generating URLs

Signed URLs can be generated by providing a regular URL and an expiration date to the sign method.

$expirationDate = (new DateTime())->modify('10 days');

$urlSigner->sign('https://myapp.com', $expirationDate);

// => The generated url will be valid for 10 days

If an integer is provided as expiration date, the URL will be valid for that amount of seconds.

$urlSigner->sign('https://myapp.com', 30);

// => The generated URL will be valid for 30 seconds

Validating URLs

To validate a signed URL, simply call the validate() method. This will return a boolean.

$urlSigner->validate('https://myapp.com/?expires=1439223344&signature=a479abde194d111022a6831edbda29b14e7bdb760438a8a0be2556cd1a6c23fa');

// => true

$urlSigner->validate('https://myapp.com/?expires=1439223344&signature=a479abde194d111022a6831edbda-INVALID-29b14e7bdb760438a8a0be2556cd1a6c23fa');

// => false

Writing custom signers

This packages provides a signer that uses SHA256 to generate signature. You can create your own signer by implementing the Spatie\UrlSigner\Contracts\UrlSigner-interface. If you let your signer extend Spatie\UrlSigner\AbstractUrlSigner you'll only need to provide the createSignature-method.

Tests

The tests can be run with:

composer test

Integrations

To get started quickly in Laravel you can use the spatie/laravel-url-signer package.

Changelog

Please see CHANGELOG for more information what has changed recently.

Contributing

Please see CONTRIBUTING for details.

Security

If you've found a bug regarding security please mail security@spatie.be instead of using the issue tracker.

Credits

About Spatie

Spatie is a webdesign agency in Antwerp, Belgium. You'll find an overview of all our open source projects on our website.

License

The MIT License (MIT). Please see License File for more information.