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amertkara / aws_utils.py
Last active March 13, 2024 11:10
Amazon SNS Notification Verification with Python, M2Crypto. When the SNS pushes a notification, a receiver should verify the origin/integrity of the push notification (AWS) using the signature and certificate provided in the notification data. The function `verify_sns_notification` below takes the request object and verifies the origin/integrity…
# -*- coding: utf-8 -*-
import json
import urllib2
from M2Crypto import X509
from base64 import b64decode
from M2Crypto.Err import M2CryptoError
SNS_MESSAGE_TYPE_SUB_NOTIFICATION = "SubscriptionConfirmation"
SNS_MESSAGE_TYPE_NOTIFICATION = "Notification"
SNS_MESSAGE_TYPE_UNSUB_NOTIFICATION = "UnsubscribeConfirmation"