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I'm not exactly sure how passes are signed, but in most digital signature schemes, you only sign the hash of the message, not the actual contents. Therefore you
by gruez 11mo ago
I'm not exactly sure how passes are signed, but in most digital signature schemes, you only sign the hash of the message, not the actual contents. Therefore you could conceivably do this in a privacy preserving way by only passing in the hash to be signed, which would allow the server to generate a valid signature without knowing the contents.
- alentodorov 11mo agoApple Wallet passes use CMS signatures. you're right that only hashes are signed. but Apple requires an official Developer certificate ($99/year) with a private key that can't be exposed to browsers. for true privacy, each user would need their own cert. and defeats the "free" goal. and if you have a dev certificate it's trivial to generate one on your own machine.
- gruez 11mo ago>Apple Wallet passes use CMS signatures. you're right that only hashes are signed. but Apple requires an official Developer certificate ($99/year) with a private key that can't be exposed to browsers. Why can't the browser send the hash to the server for signing?
- alentodorov 11mo agolet me look into it.
- tushev 11mo ago[dead]
- saagarjha 11mo agoAny chance of allowing me to upload my own keys and doing the signing in the browser? I am sure this is a niche use case but I know how to generate the certificate for this but have been too lazy to make a thing like this for (checks to-do list) something like six years and I'd much rather just use your thing lol
- the_lucifer 11mo agoHaha, I just made a comment above that I've been sitting on a half done project to do this for around 8 years now.
- alentodorov 11mo agothat's a good idea. i'll release a BYOK version but don't plan to host it myself. will include a quick run script to run it locally.