Cloudformation SQS Policy for S3 events

Question

I'm trying to create a policy for an SQS queue which would allow any S3 bucket to send events to the queue. I don't seem to be able to do this for a specific S3 queue because I end up with circular dependencies.

I've created a cloudformation template which will create the queue and policy, but when I try and manually setup the S3 bucket to send the events I get a message saying

Permissions on the destination queue do not allow S3 to publish notifications from this bucket

The template section that I'm using to create the policy is:

    "SQSNotifcationFromS3" : {
        "Type" :        "AWS::SQS::QueuePolicy",
        "DependsOn" : "S3Notifications",
        "Properties" : {
            "PolicyDocument" : {
                "Version": "2012-10-17",
                "Id": "SQSIDsimon",
                "Statement": [
                    {
                        "Sid": "example-statement-ID",
                        "Effect": "Allow",
                        "Principal": {
                            "Service": "s3.amazonaws.com"
                            },
                        "Action": "SQS:*",
                        "Resource": { "Ref" : "S3Notifications"}
                    }
                ]                  
            },
            "Queues" :      [ { "Ref" : "S3Queue" } ]
        }
    }

Answer 1

In the end, I found a solution for this - I set the permissions on the SQS so that any S3 bucket could add events to the queue:

    "S3EventQueuePolicy" : {
        "Type" : "AWS::SQS::QueuePolicy",
        "DependsOn" : [ "S3EventQueue" ],
        "Properties" : {
            "PolicyDocument" : {
                "Id": "SQSPolicy",
                "Statement": [
                    {
                        "Sid": "SQSEventPolicy",
                        "Effect": "Allow",
                        "Principal": "*",
                        "Action": "SQS:*",
                        "Resource": "*",
                        "Condition": {
                            "ArnLike": {
                                "aws:SourceArn": "arn:aws:s3:::*"
                            }
                        }
                    }
                ]
            },
            "Queues" : [ { "Ref" : "S3EventQueue"} ]
        }            
    },