1/8/2024 0 Comments Slack supportHere's an overview of the process to validate a signed request from Slack: Ingredients required: one (1) HTTP request from Slack, one (1) signing secret, one (1) programming language of your choice. This one's as simple as good old mac-and-cheese: How to make a request signature in 4 easy steps: an overview and not one of those fancy cookbooks recipes, either. The recipe for the signature is as simple as a cookbook recipe. When Slack sends your app a request, your app must check to make sure it's authentic. You might even be notified that your app has been given new resources and permissions. If you're the proud owner of a slash command, your app'll be notified when someone uses your command. If you're subscribed to the Events API, your app might receive a request when a reacji has been added to a message. Slack uses HTTP requests to notify your app that something has happened. You make sure the signature you've computed matches the signature on the request.Your app computes a signature based on the request.Your app receives a request from Slack.See the SDK support section for more detail. Some SDKs perform signature verification automatically, accessible via an easy drop-in replacement of your signing secret for your old verification token. Good news: the new signature is used exactly the same way as the deprecated verification token. Signing secrets replace the old verification tokens. That keeps your app secure, preventing bad actors from causing mischief. The resulting signature is unique to each request and doesn't directly contain any secret information. The signature is created by combining the signing secret with the body of the request we're sending using a standard HMAC-SHA256 keyed hash. On each HTTP request that Slack sends, we add an X-Slack-Signature HTTP header. Verify requests from Slack with confidence by verifying signatures using your signing secret. Slack creates a unique string for your app and shares it with you. Types of requests that use signed secrets.The signing process is the cooler, fresher sibling of verification tokens. With the help of signing secrets, your app can more confidently verify whether requests from us are authentic. Slack signs its requests using a secret that's unique to your app.
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