Cloudfront URL Signer

This Moodle filter recognises cloudfront URLs from the URLs defined in the filter settings and replaces them with signed URLs.
This Moodle filter recognises cloudfront URLs from the URL defined in the filter settings and replaces them with signed URLs.
See http://docs.aws.amazon.com/AmazonCloudFront/latest/DeveloperGuide/private-content-signed-urls.html  for full details
Installation
Simply place the filter files in ./filter/cloudfront_signurl
Setup
In the filter settings you will need to define the URL for the cloudfront distribution along with the Key Pair ID and private key file to use for the signing process.
See http://docs.aws.amazon.com/AmazonCloudFront/latest/DeveloperGuide/private-content-trusted-signers.html
At present only canned policies are supported.