10mo ago

GnuPG / GPG how create an EdDSA key !?

Hi,

I've seen some tutorial to create EdDSA key with Gnupg

gpg --full-gen-key

and it's supposed to allow me to create ECC key, but I see only

Please select what kind of key you want:
\ (1) RSA and RSA (default)
\ (2) DSA and Elgamal
\ (3) DSA (sign only)
\ (4) RSA (sign only)
\ (14) Existing key from card
\ Your selection?\

gpg --version show:

...
\ gpg (GnuPG) 2.2.27
\ Supported algorithms:
\ Pubkey: RSA, ELG, DSA, ECDH, ECDSA, EDDSA
\ ...

Any idea what's wrong ?

8 comments

I remember on some distros I had to add --expert, never checked why. Maybe was an old version.
gpg --expert --full-gen-key
- Thank you @Anafabula@discuss.tchncs.de ! it works !
  Please select what kind of key you want:
  \ (1) RSA and RSA (default)
  \ (2) DSA and Elgamal
  \ (3) DSA (sign only)
  \ (4) RSA (sign only)
  \ (7) DSA (set your own capabilities)
  \ (8) RSA (set your own capabilities)
  \ (9) ECC and ECC
  \ (10) ECC (sign only)
  \ (11) ECC (set your own capabilities)
  \ (13) Existing key
  \ (14) Existing key from card\
  I'm wondering whats is the option: (9) ECC and ECC ?? I found nothing in their documentation :/
I had the same issue so wrote this down when I figured it out
Generate ultimate key
bash

gpg2 --quick-generate-key hello@example.com ed25519 default 0
Add sub key
bash

gpg2 --quick-add-key <FINGERPRINT> ed25519
List keys in long format
bash

gpg2 --list-keys --with-subkey-fingerprint --keyid-format long
What distro and version of that distro are you using? Did you install gpg from the repository or elsewhere? What version of gpg are you running?
Unless you're working with embedded chips with very small storage space, I'd recommend 4098-bit RSA
- ~~8096 bit is safer long term as it should remain uncrackable for a longer time.~~
  I was thinking you were talking about 2048
  
  Does GPG support it?

8 comments

Generate ultimate key

Add sub key

List keys in long format