support gpg2 kbx

[liu0013]

I tried to use gpg2 pubring.kbx in config.yaml that does not work well, so I have to install gpg1 to add pubring.gpg into config.yaml. Can you please support gpg2 config in the future version? Thanks!

[esilva-everbridge]

I'd love to, unfortunately gpg2 did away with the readable secring.gpg file and the only gnupg2 API that can be used for accessing the secret keys that I could find is using the gpgme library. This could be done, and I did think about doing it, but it would mean using cgo and linking to the gpgme C library, which would make cross platform releases challenging. By using gpg1 I can keep this in pure Go and easily provide releases for multiple platforms.

I haven't given up on being able to use gpg2, but I have no time frame for it as of now.

[liu0013]

thanks @esilva-everbridge !

[esilva-everbridge]

Options going forward:

• fall back on using gpg2 binary (ugly, but could work well, even across platforms, but might make testing difficult)
• write code to talk to gpg-agent socket to get secret keys (not well documented)
• try to figure out how to read the kbx file format?