Alrite finally i got the OpenSSL Crypto to work HealthVault. It took some Ninja hacking and quite a lot of debugging to figure out what was going wrong with signing of a xml for getting an authentication token from HealthVault. Turns out that my signing code was dead on but HealthVault didn’t quite like the white space in the “content” section. I wont belabor you more but the short of the long is that now OpenHealthVault can talk to HealthVault and get itself authenticated. As usual the code is at and the application in action is at Well now its time to get a user to be authenticated with HealthVault Shell and the Rails goodies, I expect these to flow rather smoothly.

Next part : Doing User Authentication