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fix spelling

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Nick
2023-09-30 13:23:42 +02:00
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docs/WEBHOOK_SECRET.md
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@@ -2,11 +2,11 @@
## How does the signing work?
Pi.Alert will use the configured secret to create a hash signature of the requests body. This SHA256-HMAC signature will appear in the `X-Webhook-Signature` header of each request to the webhook target URL. You can use the value of this header to validate the request was sent by Pi.Alert.
Pi.Alert will use the configured secret to create a hash signature of the request body. This SHA256-HMAC signature will appear in the `X-Webhook-Signature` header of each request to the webhook target URL. You can use the value of this header to validate the request was sent by Pi.Alert.
## Activating webhook signatures
All you need to do in order to add a signature to the requests headers is to set the `WEBHOOK_SECRET` config value to a non-empty string.
All you need to do in order to add a signature to the request headers is to set the `WEBHOOK_SECRET` config value to a non-empty string.
## Validating webhook deliveries
@@ -15,11 +15,11 @@ There are a few things to keep in mind when validating the webhook delivery:
- Pi.Alert uses an HMAC hex digest to compute the hash
- The signature in the `X-Webhook-Signature` header always starts with `sha256=`
- The hash signature is generated using the configured `WEBHOOK_SECRET` and the request body.
- Never use a plain `==` operator. Instead consider using a method like [`secure_compare`](https://www.rubydoc.info/gems/rack/Rack%2FUtils:secure_compare) or [`crypto.timingSafeEqual`](https://nodejs.org/api/crypto.html#cryptotimingsafeequala-b), which performs a "constant time" string comparison to help mitigate certain timing attacks against regular equality operators, or regular loops in JIT-optimized languages.
- Never use a plain `==` operator. Instead, consider using a method like [`secure_compare`](https://www.rubydoc.info/gems/rack/Rack%2FUtils:secure_compare) or [`crypto.timingSafeEqual`](https://nodejs.org/api/crypto.html#cryptotimingsafeequala-b), which performs a "constant time" string comparison to help mitigate certain timing attacks against regular equality operators, or regular loops in JIT-optimized languages.
## Testing the webhook payload validation
You can use the following secret and request body to verify your implementation is working correctly.
You can use the following secret and payload to verify that your implementation is working correctly.
`secret`: 'this is my secret'
@@ -33,6 +33,6 @@ If your implementation is correct, the signature you generated should match the
## More information
If you want to learn more about webhook security, take a look at [Github's webhook documentation](https://docs.github.com/en/webhooks/about-webhooks).
If you want to learn more about webhook security, take a look at [GitHub's webhook documentation](https://docs.github.com/en/webhooks/about-webhooks).
You can find examples for validating a webhook delivery [here](https://docs.github.com/en/webhooks/using-webhooks/validating-webhook-deliveries#examples).