GPG Import / Export / Clone

gpgflow.sh

# Based on the following articles
#   https://blog.programster.org/generating-gpg-master-and-subkeys
#   https://risanb.com/code/backup-restore-gpg-key/
#   https://gist.github.com/oseme-techguy/bae2e309c084d93b75a9b25f49718f85

gpg_keyid() {
    gpg2 --list-secret-keys \
        | sed  -n 's/^      \(\w*\)/\1/p'
}

gpg_keygrip() {
    gpg2 --with-keygrip --list-key $(gpg_keyid) \
        | sed -n 's/^      Keygrip = \(\w*\)/\1/p' \
        | head -n 1
}

gpg_export() {
    gpg2 --export-secret-keys --armor $(gpg_keyid) > gpg-keys.txt
    gpg2 --export-ownertrust > gpg-trust.txt
}

gpg_import() {
    gpg2 --import gpg-keys.txt
    gpg2 --import-ownertrust < gpg-trust.txt
}

gpg_clone() {
    gpg_export
    mkdir gpg-home
    chmod 700 gpg-home
    GNUPGHOME=gpg-home gpg_import
    rm gpg-home/private-keys-v1.d/$(gpg_keygrip).key
}

command=$1
shift
gpg_$command $@