You can use the new AWS Certificate Manager[0] with CloudFront[1], which you can attach to your S3 bucket. The docs aren't brilliant, though.

[0]: https://aws.amazon.com/blogs/aws/new-aws-certificate-manager... [1]: http://docs.aws.amazon.com/acm/latest/userguide/gs.html

Pretty easy. Use CloudFront instead, which has full SSL support, to serve up the content stored on S3.