Amazon S3 user policy for uploading via Grails cdn-asset-pipeline plugin

cdn-upload-policy.json

{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Effect": "Allow",
      "Action": "s3:*",
      "Resource": [
        "arn:aws:s3:::mybucket/*”, "arn:aws:s3:::mybucket"
      ]
    }
  ]
}