WIP: Feature/gpg vks

[Cellebyte]

This needs some further development and is not releaseable in the current state.

[vollkorn1982]

I can search and download keys without a problem, but adding keys to the keyserver does not seem to work with the gpg-vks branch. No error message at all, but I do not get an e-mail for verification of the upload. I'll need to dig deeper into this to figure out what's happening and look at the HTTPS traffic, I guess.

[Valodim]

can recommend mitmproxy to debug this kind of thing :)

[Cellebyte]

@Valodim @vollkorn1982 I don't tested the add functionality of the vks-protocol so far.
I will also look into it after work. ^^

[vollkorn1982]

Good news: add() was successful. The key confirmation e-mails were just stuck in grey-listing for a long time. I received them now.

Therefore, I conclude: This branch works fine for me :)

[Valodim]

Actually, it seems like the add() call only uses /pks/add. That will only work for an initial upload of the key, HKP just isn't meant for that workflow so we can't really use it for verification. see https://keys.openpgp.org/about/api for details

[Cellebyte]

Actually, it seems like the add() call only uses /pks/add

/vks/v1/upload is also possible will add that later.