SSL and HTTPS are Table Stakes

We’re working on a new back-end to support our visualizations of personal data from services like Twitter, Facebook and LinkedIn. These services now routinely offer https, the secure form of http, as an option to protect users from eavesdropping on open networks. It took a high profile release of a simple tool, FireSheep, to give users the awareness to activate this by default, and many users still aren’t aware that they need to do it. A few months later, https is “table stakes” for online services that handle personal data and it makes sense to activate it in new products by default. For example, your server must support https if you want to use Foursquare’s new push APIs or display content on Facebook after October 1st. Other services will surely follow suit.

If like me you’ve never needed to activate https you might not know what’s involved or what to look for. I’m still learning, but I thought I’d share what I’ve found so far.

To enable https you need to make sure your web server host supports it and you need an SSL certificate. SSL certificates are “just” text files of data that represent a chain of trust from a certificate authority through the certificate seller and down to you. The certificate authority’s credentials are installed in your browser to allow it to verify the certificates of websites you visit. Ideally there are identity checks at all stages of the certification process, though in practice it’s probably just an automated phone message and an email by the time it gets to you. Of course you need a credit card to pay for a certificate; those are table stakes too.

SSL on Heroku

We’re using Heroku for our hosting and they support a few different options for SSL in their add-ons section. If you’re using a * or * domain for your app you can just activate “piggy-back” SSL for free and stop reading. I’m told by support that this will be activated by default for new apps and that it definitely supports the new Cedar stack, which wasn’t clear from the add-on page.

Otherwise, the differences between SSL options are fairly well explained on the SSL add-on page and from Heroku’s perspective it’s a matter of pushing you towards solutions that are most compatible with cloud hosting. Securing every subdomain is usually what you want, but in the cloud this means a dedicated IP address for your domain and you will be charged accordingly. We went with hostname SSL, which is a bit more convenient in the cloud but still requires a load balancer step, so Heroku currently charges $20/month for this option. Hostname SSL enables us to secure a single subdomain like

Note: if you’re using Heroku their graphical tools are beautifully designed but not especially feature-complete, especially for SSL. It’s better to jump straight to the technical documentation and complete tasks on the command line. Their documentation for SSL support is clear and up-to-date.

Choosing a Provider

After asking around we received a couple of recommendations for an SSL certificate. Most useful articles you’ll find with Google talk about using GoDaddy but we’re not big fans of their up-sell process or tools so we wanted to try another seller. looked good but wouldn’t support our .io domain name, so we went with RapidSSL.

The main thing we were looking for was straight-talk and focus, which is why we chose RapidSSL. Our DNS provider also sells SSL certificates but their documentation seemed out of date and links to help documents were broken. But if you like one of your existing providers then of course check with them first.

Note: RapidSSL is an entry-level reseller of certificates from GeoTrust. If you’re not on a budget, or you want Extended Validation which will show your name in the address bar in modern browsers, then go directly to GeoTrust and pay a little bit more. We’re not conducting credit card transactions and our API traffic is largely behind the scenes, so we’re more interested in privacy and security than user experience at the moment.

Making a key and Certificate Signing Request

To acquire an SSL certificate you need to create a private key for your server and use it to create a Certificate Signing Request which you upload during the purchase process.

Heroku uses Nginx to serve your pages (no matter which language you’re using to serve responses, Nginx sees the requests first and forwards them to your app). RapidSSL didn’t have instructions for creating a key/CSR for Nginx but the instructions for Apache worked fine. I used the openssl command in my Mac terminal, as follows:

  1. Generate a new key with

    openssl genrsa -des3 -out 2048

  2. Generate a CSR with

    openssl req -new -key -out

    – note that Common Name will be the name of the subdomain you’re securing.

  3. Copy/paste the CSR into RapidSSL’s form as part of the purchase process
  4. Complete the phone confirmation step. I also needed to activate a new forwarding email address on our domain to handle the admin email, because our .io domain couldn’t provide the relevant admin contacts automatically.
  5. Await your certificates by email. This wasn’t as rapid as we’d hoped, it took about an hour.
  6. A web server usually requires an unlocked key, so do

    openssl rsa -in -out

    to create that. With hindsight you could leave out the -des3 in step one and skip this step.

  7. Save the keys you receive by email. For filenames we used for ours and intermediate.crt for the certificate authority’s certificate.
  8. Combine your key and the intermediate key using

    cat intermediate.crt >

    (.pem and .crt seem to be used interchangeably, please let us know if this is incorrect).

  9. Upload the certificate and unlocked key to Heroku for your app:

    heroku ssl:add --app example-app

  10. Activate Hostname SSL, and consent to being charged $20/month:

    heroku addons:add ssl:hostname --app example-app

  11. Lastly, update the CNAME DNS record for your subdomain to point to the new hostname provided to you in an email from Heroku. This arrived as quickly as I could check my email.

That’s it! Phewf! A simple 11-step process. There’s a full transcript of this on github if you want to see what the responses look like, and once you have a certificate Heroku’s SSL docs are excellent. Good luck!

Planetary, Version 2

We’re proud to announce that version 2.0 of Planetary, our celestial music player for iPad, is now available for download in the iTunes App Store!

Bloom Planetary 2 screenshot

To learn more about how Planetary was made, check-out Robert’s in-depth behind-the-scenes post and the extra notes on his personal portfolio site, or read on for a summary of “What’s New”:

Planetary 2.0 features a full graphical update: new galaxy detail, solar flares, eclipses, atmospheric glow, accretion disks and much more fine detail at planet and moon level. Additional detail is available for iPad 2.

To address your most popular feature requests we’ve added in-app support for playlist selection and shuffle/repeat modes.

Other new features include optional automatic camera motion (great for long playlists!), gyroscope support for iPad 2 and scale and speed sliders to adjust the universe to your tastes.

Several small bugs with version one are also fixed and Planetary 2.0 has much better interactive performance, especially when flying between planets and when interacting with the playhead slider.

Many thanks for all the feedback and kind words we received about version 1 – keep it coming!

Beginnings and Endings

This second release of Planetary also marks the departure of our colleague Robert Hodgin. You might remember that we announced Robert had joined us as Creative Director earlier this year. With hindsight we realize it would have been more appropriate for him to join us as artist in residence for the duration of the Planetary project. In practice that’s what his role has been, and he’s made the choice to step away at this point.

Robert returns to pursuing his own projects and plans to increase his contributions to the Cinder library. We’ll continue to use Cinder in future Bloom projects too so we’re very excited about this and wish him well in all his future endeavors. Thanks Robert, it’s been a fantastic journey!

What Next?

We hope to play host to more artists-in-residence in future, without blending that process with a more traditional production role unless that’s the right thing to do. If you’re an ambitious digital artist interesed in working with Bloom in this capacity, and helping us define it, please get in touch.

We’re also considering creating a more traditional Creative Director role within our team, if you’re interested in helping us define this role please get in touch.

As with all our openings, we’re not interested in hearing from recruiters or agencies at this time.


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