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Recurly Webhook Signature Verification Failed
Understanding Recurly and Its Purpose
Recurly is a leading subscription management platform that provides businesses with the tools to manage billing and subscriptions efficiently. It offers a robust API that allows developers to integrate subscription billing into their applications seamlessly. Recurly's features include automated billing, revenue recognition, and comprehensive reporting, making it a preferred choice for businesses looking to streamline their subscription processes.
Identifying the Symptom: Webhook Signature Verification Failed
When integrating Recurly's webhook functionality, you might encounter an error message stating: "Webhook Signature Verification Failed." This error indicates that the signature of the received webhook does not match the expected signature, which is crucial for ensuring the security and authenticity of the webhook data.
Exploring the Issue: Why the Signature Verification Fails
The "Webhook Signature Verification Failed" error occurs when the signature calculated on your server does not match the signature sent by Recurly. This discrepancy can arise due to several reasons, such as incorrect webhook signing secret, errors in signature calculation, or data tampering during transmission.
Understanding Webhook Signatures
Recurly uses HMAC with SHA-256 to sign webhook payloads. The signature is included in the X-Recurly-Signature header of the webhook request. Your server must verify this signature to ensure the webhook's integrity.
Steps to Fix the Webhook Signature Verification Issue
To resolve the "Webhook Signature Verification Failed" error, follow these steps:
Step 1: Verify the Webhook Signing Secret
Ensure that you are using the correct webhook signing secret provided by Recurly. You can find this secret in your Recurly account settings under the "Webhooks" section. Make sure it matches the secret used in your server-side code.
Step 2: Correctly Calculate the Signature
Use the correct algorithm (HMAC with SHA-256) to calculate the signature. Here's a sample code snippet in Python:
import hmac
import hashlib
def verify_signature(payload, signature, secret):
calculated_signature = hmac.new(
secret.encode(), payload.encode(), hashlib.sha256
).hexdigest()
return hmac.compare_digest(calculated_signature, signature)
Ensure that the payload and signature are correctly extracted from the webhook request.
Step 3: Check for Data Integrity
Ensure that the payload data is not altered during transmission. Any changes in the payload will result in a signature mismatch. Use tools like RequestBin to inspect the webhook payloads received by your server.
Additional Resources
For more information on Recurly webhooks, refer to the official Recurly Webhooks Documentation. If you continue to experience issues, consider reaching out to Recurly Support for further assistance.
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