doc: How to Manage WebAuthn Keys: Browser, macOS, YubiKey, etc

[coolaj86]

Chromium

• chrome://settings/passkeys
• brave://settings/passkeys

macOS

• Search "passkeys" in macOS Settings

YubiKey

• YubiKey Manager GUI (deprecated): https://www.yubico.com/support/download/yubikey-manager/
  To [install the pkg on macOS without allowing admin privileges](pkgutil --expand-full ~/Downloads/foo.pkg /tmp/foo/):

  pkgutil --expand-full ~/Downloads/yubikey-manager-qt-1.2.5-mac.pkg /tmp/yubikey-gui/
  mv "/tmp/yubikey-gui/com.yubico.ykman.pkg/Payload/YubiKey Manager.app" /Applications/

• YubiCo Authenicator: https://www.yubico.com/products/yubico-authenticator/#h-download-yubico-authenticator
  (haven't tried it yet, but might be able to do as much or more than the CLI)
• YubiKey Manager CLI: https://developers.yubico.com/yubikey-manager/Releases/

  pkgutil --expand-full ~/Downloads/yubikey-manager-5.5.0-mac.pkg /tmp/yubikey-cli
  mv /tmp/yubikey-cli/ykman.pkg/Payload/usr/local/ ~/.local/opt/yubikey-v5.5.0
  ln -s yubikey-v5.5.0 ~/.local/opt/yubikey
  xattr -r -d com.apple.quarantine ~/.local/opt/yubikey/
  ln -s ../opt/yubikey/bin/ykman ~/.local/bin/

  and then make sure ~/.local/bin is in your PATH, such as with https://webinstall.dev/pathman (or webi itself).

  pathman add ~/.local/opt/yubikey/bin/

The GUI doesn't seem to do much of anything. The CLI has more options:

# this definitely shows fewer accounts that I know I have, but I didn't find them under the other options either
ykman fido credentials list --csv

credential_id,rp_id,user_name,user_display_name,user_id
6ccd32400f0fc8cecfbaeca6932a53612477b57629ad1d36a461ca6e01342dd93df0af0f8db9d224d0f801482f22660e,local.pocketid.app,aj@therootcompany.com,aj,302e3430313230383733343534383933363335

ykman fido credentials delete <full-id> [-f]