wagon/back/srv/dashboard/del

#!/bin/bash
# FILE:       	wgapi:back/api/dashboard/del
# DESCRIPTION:	Del a peer
# USAGE:      	del remote_ip querystring
# ERRORS:
# 	3: Bad usage
# 	4: Missing config
# 	5: wg not found
# 	8: Invalid token
# 	6: Pubkey not in user peer list

CONFIG_FILE='/etc/wgapi/config'
SERVERS_FILE='/etc/wgapi/servers'
if ! [ ${#} -eq 2 ]; then
	printf 'ERROR! Bad input: %s %s\n' "${0}" "${*}" >>"${LOGFILE}"
	exit 3
fi; if ! [ -x '/usr/bin/wg' ]; then
	printf 'ERROR! %s could not find /usr/bin/wg\n' "${0}" >>"${LOGFILE}"
	exit 5
fi; if ! [ -f "${CONFIG_FILE}" ]; then
	printf 'ERROR! %s could not find %s!\n' "${0}" "${CONFIG_FILE}" >>"${LOGFILE}"
	exit 4
fi
source "${CONFIG_FILE}"
if ! [ -f "${SERVERS_FILE}" ]; then
	printf 'ERROR! %s could not find %s!\n' "${0}" "${SERVERS_FILE}" >>"${LOGFILE}"
	exit 4
fi; if ! [ -f "${TOKENS_FILE}" ]; then
	printf 'ERROR! %s could not find %s!\n' "${0}" "${TOKENS_FILE}" >>"${LOGFILE}"
	exit 4
fi
ip="${1}"
qs="$(<<<"${2}" tr '&' '\n' | sed 's/?//')"

# Parse pubkey
pubkey="$(<<<"${qs#}" grep 'pubkey=' | sed 's/pubkey=//')" 
printf '%s requested to delete %s\n' "${ip}" "${pubkey}" >>"${LOGFILE}"

# Check token
token_fail(){
	printf 'Rejecting %s request for new peer due to %s token\n' "${ip}" "${1}" >>"${LOGFILE}"
	printf 'Invalid token\n' | "${LIB_DIR}/http_res" 403
	exit 8
}
saved_token="$(grep "${ip}" "${TOKENS_FILE}" | cut -f2)"
[ "${saved_token}" == "" ] && token_fail 'missing'
<<<"${qs}" grep -qx "t=${saved_token}" || token_fail 'mismatched'
printf '%s token was valid\n' "${ip}" >>"${LOGFILE}"

# Get peer
if ! peer="$("${LIB_DIR}/wg_peer_list" "${ip}" 'tsv' | grep "${pubkey}")"; then
	printf 'ERROR! Peer %s not found for user %s!\n' "${pubkey}" "${ip}" >>"${LOGFILE}"
	printf 'Peer not found\n' | "${LIB_DIR}/http_res" 404
	exit 6
fi
domain="$(<<<"${peer}" cut -f1)"
ipv4="$(<<<"${peer}" cut -f2)"
ipv6="$(<<<"${peer}" cut -f3)"
if ! printf 'Delete request was for %s %s %s\n' "${domain:?}" "${ipv4:?}" "${ipv6:?}" >>"${LOGFILE}"; then
	printf 'ERROR! Failed to collect peer data: %s %s %s\n' "${domain}" "${ipv4}" "${ipv6}" >>"${LOGFILE}"
	printf 'Failed to collect peer data\n' | "${LIB_DIR}/http_res" 500
	exit 6
fi
hostname="$(<<<"${domain}" cut -d'.' -f1)"
username="$(<<<"${domain}" cut -d'.' -f2)"

# Wireguard
# TODO: Do this loop in parallel
while IFS=$'\t' read -r server_hostname server_ipv4 server_ipv6 server_pubkey server_endpoint server_admin server_secret; do
	[[ ${server_hostname:0:1} = \# ]] && continue # Ignore comments
	if [ "${server_hostname}" == "${LOCAL_SERVER}" ]
		then printf 'Deleting %s from local wireguard server... ' "${domain}" >>"${LOGFILE}"
			if "${LIB_DIR}/wg_peer_del" "${pubkey}"; then
				printf 'success.\n' >>"${LOGFILE}"
			else
				printf 'failed!\n' >>"${LOGFILE}"
				# TODO: clear existing progress
				exit 15
			fi			
		else printf 'Deleting %s from remote wireguard server %s... ' "${domain}" "${server_hostname}" >>"${LOGFILE}"
			# TODO Add federated peer
			#if "${LIB_DIR}/fed_peer_add" "${server_admin}" "${pubkey}" "${server_psk}" "${ipv4}/32,${ipv6}/128" "${server_secret}"; then
				printf 'success.\n' >>"${LOGFILE}"
			#else
			#	printf 'failed!\n' >>"${LOGFILE}"
			#	# TODO: clear existing progress
			# exit 16
			#fi"${LIB_DIR}/fed_peer_del" "${server_admin}" "${pubkey}" "${server_secret}"
	fi
done <"${SERVERS_FILE}"

# Respond to user
# Do it before updating nameserver and certs because
# if wireguard worked, there's no going back.  The admin
# can clean up missing records and certs after checking the logs
printf 'Deleted %s.%s.%s' "${hostname}" "${username}" "${TLD}" | "${LIB_DIR}/http_res" 202

# Update nameserver
if "${LIB_DIR}/ns_update_del" "${domain}" "${ipv4}" "${ipv6}"
	then printf 'Successfully deleted %s from DNS server.\n' "${domain}" >>"${LOGFILE}"
	else printf 'ERROR! Failed to delete %s %s %s from DNS server!\n' "${domain}" "${ipv4}" "${ipv6}" >>"${LOGFILE}"
fi

# Create SSL cert
if "${LIB_DIR}/ssl_peer_del" "${hostname}" "${username}"
	then printf 'Successfully deleted SSL certs for %s\n' "${domain}" >>"${LOGFILE}"
	else printf 'ERROR! Failed to delete certs for %s!\n' "${domain}" >>"${LOGFILE}"
fi