adonis-url-signer

Create secured URLs with a limited lifetime in AdonisJs

This library allows you to easily create "signed" URLs. These URLs have a "signature" hash appended as query string so we can easily verify that it's not manipulated.

For example, you might use signed URLs to implement "password reset link" which is valid for couple of hours only.

Install

adonis install adonis-url-signer

Setup

Register the urlSigner provider in start/app.js:

const providers = [
    ...
    'adonis-url-signer/providers/UrlSignerProvider'
]

Register aliases of provider in start/app.js:

const aliases = {
    ...
    UrlSigner: 'Adonis/UrlSigner'
}

Config

Configuration is defined inside a file config/urlSigner.js

const Env = use('Env')
 
module.exports = {
    signatureKey: Env.getOrFail('APP_KEY'),
    defaultExpirationTimeInHour: 24,
    options: {
        expires: 'expires',
        signature: 'signature'
    }
}

Usage

To create a signed URL, use the sign method of the UrlSigner.

const UrlSigner = use("UrlSigner");
 
return UrlSigner.sign("http://secured.domain/sign", { user: 1 })
 
// http://secured.domain/sign/?user=1&signature=xxxxxxxxxxx

You can also generate a temporary signed URL that expires, you may use the temporarySign method. You need to pass expiration in hour:

const UrlSigner = use("UrlSigner");
 
return UrlSigner.temporarySign('http://secured.domain/tempSigner', 24, { user : 1 });
 
// http://secured.domain/sign/?expiry=1553106418&user=1&signature=xxxxxxxxxxx

Validating Incoming Request

To verify incoming request has valid signature, you should call isValidSign method.

const UrlSigner = use("UrlSigner");
 
Route.get("/sign", ({ request }) => {
    const url = request.protocol() + "://" + request.header("host") + request.originalUrl();
    if (!UrlSigner.isValidSign(url)) {
        // 403 Forbridden
    }
    ...
});

Alternative you can also use signed middleware to validate incoming request. Register named middleware in start/kernel.js:

const namedMiddleware = {
    ...
    signed: 'Adonis/UrlSigner/Signed'
}

After registing middleware in you kernel, you may use that middleware in you route. If incoming request does not have a valid signature, the middleware will automatically throw an error 403 Forbridden: Access Denied:

const UrlSigner = use("UrlSigner");
 
Route.get("/sign", ({ request }) => {
    // ...
}).middleware("signed");

Tests

Tests are written using japa. Run the following commands to run tests.

npm run test:local
 
# report coverage 
npm run test
 
# on windows 
npm run test:win

Credits

• Kashyap Merai
• Special thanks to the creator(s) of AdonisJS for creating such a great framework.

Support

Having trouble? Open an issue!

License

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