vanitygen.sh

#!/usr/bin/env bash

generate_key() {
	gpg \
		--batch \
		--generate-key \
		--homedir HOME_DIR \
		2>/dev/null \
<<EOF
	Key-Type: RSA
	Key-Length: 4096
	Subkey-Type: RSA
	Subkey-Length: 4096
	Name-Real: <real-name>
	Name-Email: <email-address>
	Expire-Date: 0
	Passphrase: <passphrase>
	%pubring key.pub
	%commit
EOF
}

save_key() {
	local shortid=$(gpg key.pub 2>/dev/null \
		| head --lines=2 \
		| tail --lines=1 --bytes=17)

	mv key.pub "./GEN_KEYS/${shortid}.pub"
	printf "$(date) :: Generated $(echo ${shortid} | grep -o .... | xargs)"
}

mkdir --parents HOME_DIR # ephemeral home directory
mkdir --parents GEN_KEYS # generated public keys

while true; do
	start_time=${SECONDS}
	generate_key
	save_key
	end_time=${SECONDS}
	echo " in $(( end_time - start_time )) seconds..."
done