Skip to content

Instantly share code, notes, and snippets.

@pkirkovsky
Last active September 9, 2024 12:25
Show Gist options
  • Save pkirkovsky/c3d703633effbdfcb48c to your computer and use it in GitHub Desktop.
Save pkirkovsky/c3d703633effbdfcb48c to your computer and use it in GitHub Desktop.
Utility for resetting a Yubikey to factory defaults using gpg-connect-agent. This will wipe out any stored keys and reset PINs to default values.
# Adapted from https://developers.yubico.com/ykneo-openpgp/ResetApplet.html
gpg-connect-agent <<EOF
/hex
scd serialno
scd apdu 00 20 00 81 08 40 40 40 40 40 40 40 40
scd apdu 00 20 00 81 08 40 40 40 40 40 40 40 40
scd apdu 00 20 00 81 08 40 40 40 40 40 40 40 40
scd apdu 00 20 00 81 08 40 40 40 40 40 40 40 40
scd apdu 00 20 00 83 08 40 40 40 40 40 40 40 40
scd apdu 00 20 00 83 08 40 40 40 40 40 40 40 40
scd apdu 00 20 00 83 08 40 40 40 40 40 40 40 40
scd apdu 00 20 00 83 08 40 40 40 40 40 40 40 40
scd apdu 00 e6 00 00
scd apdu 00 44 00 00
/echo Yubikey has been successfully reset.
/echo The factory default PINs are 123456 (user) and 12345678 (admin).
EOF
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment