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krtab / agnos

Obtain (wildcard) certificates from let's encrypt using dns-01 without the need for API access to your DNS provider.
MIT License
292 stars 7 forks source link

Allow users to use other kinds of user private keys than RSA #19

Open krtab opened 1 year ago

krtab commented 1 year ago

This limitation currently stems from acme2. Cf: https://github.com/lucacasonato/acme2/issues/22

Jay2k1 commented 1 year ago

Not sure how common my use case is, but:

I desperately wanted to use a LE wildcard, but my DNS provider does not have an API. I was so glad I found this tool! However, when realizing I had to provide an RSA key and, being a prior certbot user, could only find a weird json key file (/etc/letsencrypt/accounts/acme-v02.api.letsencrypt.org/directory/<uid>/private_key.json), I was a bit puzzled.

After a bit of googling, I found a thread with several code samples or links, dealing with how to convert that key into RSA. There's Java and Go, and I also found a Python script which I ended up using.

So now that there are three different implementations, I wonder if this could be adapted and added to agnos so it would accept either an RSA key or the JSON format that probably many users are going to already have if they're switching from certbot with non-wildcard certificates.

(btw, thank you so much, this tool is ingenious and awesome!)

krtab commented 1 year ago

HI!

Thanks a lot for your very kind words, feedback is immensely precious! I'm opening a new issue regarding your demand, as this one centers more on the cryptography algorithm than the file format. I'll try to have a look at it when I have time.

justinas commented 1 year ago

I have started messing around with adding P-256 support to acme2.

Sadly, it seems that JWK/JWS/JWT ecosystem is not perfectly mature in Rust, so acme2 implements these with its own bespoke code and OpenSSL's crypto primitives. So the process isn't as easy as it could be in e.g. Go where there's stuff like stdlib crypto and go-jose.

justinas commented 1 year ago

I've submitted a PR adding P-256 account key support to to acme2: https://github.com/lucacasonato/acme2/pull/23

krtab commented 1 year ago

Great news!