wagon/back/srv/dashboard/add

#!/bin/bash
# FILE:       	wgapi:back/api/dashboard/add
# DESCRIPTION:	Add a new peer
# USAGE:      	add ip querystring
# ERRORS:
# 	 3: bad args/usage
# 	 4: vars file not found
# 	 5: Wireguard not installed
# 	 6: Hostname in use
# 	 7: Hostname too short
# 	 8: Invalid token
# 	 9: Token file not found
# 	10: Failed to get peer data from wg
# 	11: Failed to generate new IPs
# 	12: Servers file doesn't exist
# 	15: Failed to add user to local wireguard
# 	16: Failed to add user to federated server
# 	17: User not found

CONFIG_FILE='/etc/wgapi/config'
SERVERS_FILE='/etc/wgapi/servers'
[ ${#} -eq 2 ] || exit 3
[ -x '/usr/bin/wg' ] || exit 5
[ -f "${CONFIG_FILE}" ] || exit 4
[ -f "${SERVERS_FILE}" ] || exit 12
source "${CONFIG_FILE}"
[ -f "${TOKENS_FILE}" ] || exit 9
ip="${1}"
qs="$(<<<"${2}" tr '&' '\n' | sed 's/?//')"

# Check hostname
hostname="$(<<<"${qs}" grep -oP 'name=(.*)' | xargs | tr -dc 'a-z0-9' | head -c10)"
printf '%s requested new peer with hostname %s\n' "${ip}" "${hostname}" >>"${LOGFILE}"
[[ ${#hostname} -ge 3 ]] || (
	printf 'Rejecting hostname %s because it is too short.\n' "${hostname}" >>"${LOGFILE}"
	printf 'Hostname too short\n' | "${LIB_DIR}/http_res" 400
	exit 7
)

# 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'
<<<"${qs}" grep -x "t=${saved_token}" || token_fail 'mismatched'

# Check user
username="$("${LIB_DIR}/ns_lookup_rdns" "${REMOTE_ADDR}" | cut -d'.' -f2)" || (
	printf 'User not found for %s\n' "${REMOTE_ADDR}" >>"${LOGFILE}"
	printf 'User not found' | "${LIB)DIR}/http_res" 403
	exit 17
)
printf '%s identified as %s.%s\n' "${ip}" "${hostname}" "${username}"  >>"${LOGFILE}"
domain="${hostname}.${username}.${TLD}"

# Check if new peer already exists
printf '%s' "${hostnames}" | grep -o "${hostname}" && (
	printf '%s.%s.%s already exists!\n' "${hostname}" "${username}" "${TLD}" >>"${LOGFILE}"
	printf 'Hostname %s already exists!\n' "${hostname}" | "${LIB_DIR}/http_res" 409
	exit 6
)

# Collect/parse existing peer data
# Create new IPs
peers="$(sudo "${LIB_DIR}/wg_peer_list" "${1}" tsv)" || exit 10
hostnames="$(<<<"${peers}" awk '{print $0}' | cut -d'.' -f1)"
ipv4s="$(<<<"${peers}" awk '{print $1}')"
ipv6s="$(<<<"${peers}" awk '{print $2}')"
usernumber="$(<<<"${ipv4s}" head -n1 | cut -d'.' -f3)"
used_ips="$(<<<"${ipv4s}" cut -d'.' -f3)\n$(<<<"${ipv6s}" cut -d'.' -f3)"
used_hostnumbers="$(<<<"${used_ips}" sort | uniq)"
hostnumber=1
while printf '%s' "${used_hostnumbers}" | grep "${hostnumber}"
	do ((hostnumber++))
done
ipv4="${IPV4_NET%.*.*}.${usernumber}.${hostnumber}"
ipv6="${IPV6_NET%:*:*}:${usernumber}:${hostnumber}"
printf 'IP addresses for %s created:\t$%s %s\n' "${domain}" "${ipv4}" "${ipv6}" >>"${LOGFILE}"
# TODO: Check it or exit 11

# Create wg config
privkey="$(/usr/bin/wg genkey)"
pubkey="$(echo "${privkey}" | /usr/bin/wg pubkey)"
address="${ipv4}/${IPV4_NET##*/},${ipv6}/${IPV6_NET##*/}"
server_blocks=''
while IFS=$'\t' read -r server_hostname server_ipv4 server_ipv6 server_pubkey server_endpoint server_admin server_secret; do
	server_psk="$(/usr/bin/wg genpsk)"
	server_blocks="${server_blocks}\n[Peer] # ${server_hostname}.${TLD}\nPublicKey=${server_pubkey}\nPresharedKey=${server_psk}\nAllowedIPs=${server_ipv4}/32,${server_ipv6}/128\nEndpoint=${server_endpoint}\n"
	if [ "${server_hostname}" == "${LOCAL_SERVER}" ]
		# Add new user to local server
		then printf 'Adding %s to local server...' "${domain}" >>"${LOGFILE}"
			"${LIB_DIR}/wg_peer_add" "${pubkey}" "${server_psk}" "${ipv4}/32,${ipv6}/128" || (
				printf 'Failed to add new peer %s to local server!' "${ipv4}" >>"${LOGFILE}"
				# TODO: clear existing progress and exit 15
			)
		# Send new user config to federated server
		else printf 'Sending %s to remote server %s...' "${domain}" "${server_hostname}" >>"${LOGFILE}"
			"${LIB_DIR}/fed_add" "${server_admin}" "${pubkey}" "${server_psk}" "${ipv4}/32,${ipv6}/128" "${server_secret}" || (
				printf 'Failed to add new peer %s to federated server %s!' "${ipv4}" "${server_hostname}" >>"${LOGFILE}"
				# TODO: clear existing progress and exit 16
			)
	fi
done <${SERVERS_FILE}
wg_config="[Interface] # ${hostname}.${username}.${TLD}\nPrivateKey=${privkey}\nAddress=${address}\n${WG_DNS}\n${server_blocks}"

# 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 '%s' "${wg_config}" | "${LIB_DIR}/http_res"

# Update nameserver
"${LIB_DIR}/ns_update_add" "${domain}" "${ipv4}" "${ipv6}" || (
	printf 'Failed to add %s %s %s to DNS server!' "${domain}" "${ipv4}" "${ipv6}" >>"${LOGFILE}"
)

# Create SSL cert
sudo "${LIB_DIR}/ssl_peer_add" "${hostname}" "${username}" "IP:${ipv4},IP:${ipv6}" || (
	printf 'Failed to create certs for %s with IPS: %s %s!' "${domain}" "${ipv4}" "${ipv6}" >>"${LOGFILE}"
)