alexa-verifier

!tests

Verify HTTP requests sent to an Alexa skill are sent from Amazon.

This module is framework-agnostic.

If you're using expressjs, you should check out alexa-verifier-middleware which is a lot easier to integrate.

$3

Part of the certication process for alexa skills hosted on a generic web service (i.e., not AWS Lambda) is that your skill must validate requests are actually coming from Amazon. This is enforced by checking:

* the timestamp of the request
* the validity of the certificate
* the signature of the the request signed with the aforementioned certificate

This module provides a function to handle this validation.

$3

arguments
* cert_url full url of the certificate to verify (from HTTP request header named signaturecertchainurl)
* signature signature of the request (from HTTP request header named signature)
* requestRawBody full body string from POST request
* callback (optional) completion function. has 1 argument which indicates error. falsey when verification passes

You may include a callback function, in the standard node error argument-first format:

``javascript
import verifier from 'alexa-verifier'


verifier(cert_url, signature, requestRawBody, function callbackFn (er) {
// if er, something went wrong
})
`

Ommiting a callback function returns a promise:

`javascript
const verifyPromise = verifier(cert_url, signature, requestRawBody)
``