S3 only permit specific bucket object access

instructions.txt

Documented here: https://aws.amazon.com/blogs/security/how-to-restrict-amazon-s3-bucket-access-to-a-specific-iam-role/

Yes, it's really shitty.

Example Policy to ONLY allow specific IAM Roles access to the objects (denies all the other roles access to the objects):

{
    "Version": "2008-10-17",
    "Statement": [
        {
            "Effect": "Deny",
            "Principal": "*",
            "Action": [
                "s3:ListBucket",
                "s3:GetObject*",
                "s3:PutObject*",
                "s3:DeleteObject*"
            ],
            "Resource": [
                "arn:aws:s3:::SOMEBUCKET",
                "arn:aws:s3:::SOMEBUCKET/*"
            ],
            "Condition": {
                "StringNotLike": {
                    "aws:userId": "AROAEXAMPLE:*"
                }
            }
        }
    ]
}