Securely Authenticate Xero Webhooks with HMAC SHA256
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This workflow automatically verifies incoming Xero webhooks using HMAC SHA256 signatures. It ensures data integrity by comparing the received signature with a generated one, enhancing your application's security.
About This Workflow
This n8n workflow provides a robust solution for securing your Xero webhook integrations. It automatically intercepts incoming POST requests, extracts the raw request body, and uses it to generate an HMAC SHA256 signature based on a predefined secret. This generated signature is then compared against the x-xero-signature header provided by Xero. If the signatures match, the webhook is deemed authorized, and its data is securely stored in FileMaker for further processing via a custom script. If they don't match, the request is rejected with a 401 Unauthorized response. This ensures that only legitimate Xero events trigger your downstream actions, preventing unauthorized data manipulation or access.
Key Features
- Automated Signature Verification: Compares incoming Xero webhook signatures against a generated HMAC SHA256 hash.
- Enhanced Security: Protects against spoofed or tampered webhook requests.
- Seamless Integration: Connects directly with Xero's webhook system.
- Data Persistence: Stores validated webhook data in FileMaker for further processing.
- Customizable Secret Management: Allows easy configuration of your Xero webhook secret.
How To Use
- Configure Xero Webhook Node: Set the
pathto match your Xero webhook URL and ensurerawBodyis enabled. - Set Webhook Secret: In the
Cryptonode, replace the placeholder for thesecretparameter with your actual Xero webhook secret. Ensure it's correctly formatted. - Map Raw Data: The
Move Binary Datanode captures the raw request body, and theSetnode maps it to thesource_datavariable. - Configure Crypto Node: Ensure the
Cryptonode is set toHMAC SHA256, withvaluereferencing{{$json["source_data"]}}andsecretreferencing your webhook secret. - Set Up IF Condition: In the
IFnode, compare thetarget_datafrom theCryptonode with thex-xero-signaturefrom the incoming webhook headers ({{$node["Xero Webhook"].json["headers"]["x-xero-signature"]}}). - Configure Response Nodes: Connect the
Successnode to theCreate webhook recordnode to proceed with authorized webhooks. Connect theUnauthorisednode to handle invalid requests. - FileMaker Integration: Configure the
Create webhook recordnode with your FileMaker credentials and specify theWebhookslayout and thejsonfield to store the raw data. ThePerform processWebhook scriptnode then executes your custom FileMaker script using the recordedrecordId.
Apps Used
Workflow JSON
{
"id": "a4357e83-6b8a-42b7-8b8c-603cbfd77025",
"name": "Securely Authenticate Xero Webhooks with HMAC SHA256",
"nodes": 8,
"category": "DevOps",
"status": "active",
"version": "1.0.0"
}Note: This is a sample preview. The full workflow JSON contains node configurations, credentials placeholders, and execution logic.
Get This Workflow
ID: a4357e83-6b8a...
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