tor-hs: add new package

Signed-off-by: Jan Pavlinec <jan.pavlinec@nic.cz>

net/tor-hs/Makefile

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+#
+# Copyright (C) 02020 CZ.NIC, z. s. p. o. (https://www.nic.cz/)
+#
+# This is free software, licensed under the GNU General Public License v2.
+# See /LICENSE for more information.
+#
+
+include $(TOPDIR)/rules.mk
+
+PKG_NAME:=tor-hs
+PKG_VERSION:=0.0.1
+PKG_RELEASE:=1
+
+PKG_MAINTAINER:=Jan Pavlinec <jan.pavlinec@nic.cz>
+PKG_LICENSE:=GPL-3.0-or-later
+
+include $(INCLUDE_DIR)/package.mk
+
+define Package/tor-hs
+  SECTION:=net
+  CATEGORY:=Network
+  SUBMENU:=IP Addresses and Names
+  TITLE:=Tor hidden service configurator
+  DEPENDS:=+tor
+endef
+
+define Package/tor-hs/description
+  Tor Hidden Service configurator
+endef
+
+define Package/tor-hs/conffiles
+/etc/config/tor-hs
+endef
+
+define Build/Compile
+endef
+
+define Build/Install
+endef
+
+define Package/tor-hs/install
+	$(INSTALL_DIR) $(1)/etc/config/
+	$(CP) ./files/tor-hs.conf $(1)/etc/config/tor-hs
+	$(INSTALL_DIR) $(1)/etc/init.d/
+	$(INSTALL_BIN) ./files/tor-hs.init $(1)/etc/init.d/tor-hs
+	$(INSTALL_DIR) $(1)/etc/tor/
+	$(INSTALL_BIN) ./files/nextcloud-update.sh $(1)/etc/tor/
+	$(INSTALL_DIR) $(1)/usr/libexec/rpcd
+	$(INSTALL_BIN) ./files/tor_rpcd.sh $(1)/usr/libexec/rpcd/
+endef
+
+$(eval $(call BuildPackage,tor-hs))

net/tor-hs/README.md

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+# Tor Hidden service configurator
+**tor-hs** packages tries to simplify creating of hidden services on OpenWrt routers.
+
+## Requirements
+To run **tor-hs**, you need Tor package with uci config support (it was added
+with [this commit](https://github.com/openwrt/packages/commit/ca6528f002d74445e3d0a336aeb9074fc337307a) ).
+
+## Instalation
+To install package simple run
+```
+opkg update
+opkg install tor-hs
+```
+
+## Configuration
+Uci configuration is located in **/etc/config/tor-hs**
+
+### Required section of configuration
+There is  one required section **common**
+
+Example of this section
+```
+config tor-hs common
+	option GenConf "/etc/tor/torrc_hs"
+	option HSDir "/etc/tor/hidden_service"
+	option RestartTor "true"
+	option UpdateTorConf "true"
+```
+
+#### Table with options description
+| Type | Name | Default | Description |
+| ------ | ------ | ------ | ------ |
+| option |GenConf | /etc/tor/torrc_generated|Generated config by tor-hs.|
+| option | HSDir |/etc/tor/hidden_service|Directory with meta-data for hidden services (hostname,keys,etc).|
+| option | RestartTor | true| It will restart tor after running **/etc/init.d/tor-hs start**.|
+| option | UpdateTorConf | true|Update /etc/config/tor with config from **GenConf** option.|
+
+### Hidden service configuration
+If you want to create a new hidden service, you have to add a hidden-service section. For every hidden service, there should be a new **hidden-service** section.
+
+Example of hidden service section for ssh server:
+
+```
+config hidden-service
+	option Name 'sshd'
+	option Description "Hidden service for ssh"
+	option Enabled 'false'
+	option IPv4 '127.0.0.1'
+	#public port=2222, local port=22
+	list PublicLocalPort '2222;22'
+```
+
+#### Table with options description
+
+| Type | Name | Example value | Description |
+| ------ | ------ | ------ | ------ |
+|	option | Name | sshd| Name of hidden service. It is used as directory name in **HSDir**|
+|	option | Description| Hidden service for ssh| Description used in **rpcd** service|
+|	option | Enabled |false| Enable hidden service after running **tor-hs** init script|
+|	option |IPv4 |127.0.0.1|Local IPv4 address of service. Service could run on another device, in that case OpenWrt will redirect comunication.  |
+|	list | PublicLocalPort| 2222;22| Public port is port accesible via Tor network. Local port is normal port of service.|
+|option| HookScript |'/etc/tor/nextcloud-update.php'| Path to script which is executed after starting tor-hs. Script is executed with paramters **--update-onion** **hostname** . Hostname is replaced with Onion v3 address for given hidden service.
+
+## Running service
+
+To enable tor-hs service run
+```
+/etc/init.d/tor-hs enable
+/etc/init.d/tor-hs start
+
+```
+In case you enabled option *RestartTor* and *UpdateTorConf* hidden service should be running.
+Otherwise, you should also restart tor daemon.
+
+```
+/etc/init.d/tor restart
+```
+
+After that you should also restart rpcd daemon, so you can use tor-hs RPCD service.
+```
+/etc/init.d/rpcd restart
+```
+
+### RPCD
+
+RPCD servis helps users to access basic informations about hidden services on router. After running HS it contains onion url for given hidden service in hostname value.
+```
+root@turris:/# ubus call tor_rpcd.sh list-hs '{}'
+{
+	"hs-list": [
+		{
+			"name": "sshd",
+			"description": "Hidden service for ssh",
+			"enabled": "1",
+			"ipv4": "127.0.0.1",
+			"hostname": "****hidden-service-hostname****.onion",
+			"ports": [
+				"22;22"
+			]
+		}
+	]
+}
+```
+

net/tor-hs/files/nextcloud-update.sh

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+#!/bin/sh
+# This is example script for tor-hs uci config
+# HookScript option. Script is then called after running
+# hidden service.
+# It disables trusted domain check for nextcloud.
+
+NEXTCLOUD_CLI_SCRIPT="/srv/www/nextcloud/occ"
+
+nextcloud_cli() {
+	sudo -u nobody php-cli "$NEXTCLOUD_CLI_SCRIPT" "$@"
+}
+
+
+nextcloud_add_domain() {
+	onion="$1"
+	if [ -n "$onion" ] && nextcloud_cli config:system:get trusted_domains |grep "$onion" ; then
+		echo "Info: Trusted domains already disabled. Nothing to do." >&2
+	else
+		echo "Info: Disabling trusted domains." >&2
+		nextcloud_cli config:system:set trusted_domains 1000 --value=$onion
+	fi
+}
+
+print_help() {
+	echo "Help"
+}
+
+# Check occ command
+[ -f "$NEXTCLOUD_CLI_SCRIPT" ] || {
+	echo "Error: occ command not found!" >&2
+	exit 1
+}
+
+################################################################
+
+case "$1" in
+--update-onion)
+	nextcloud_add_domain "$2"
+;;
+
+*)
+	print_help
+;;
+esac

net/tor-hs/files/tor-hs.conf

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+config tor-hs common
+	#option GenConf "/etc/tor/torrc_hs"
+	option GenConf "/etc/tor/torrc_generated"
+	option HSDir "/etc/tor/hidden_service"
+	option RestartTor "true"
+	option UpdateTorConf "true"
+
+#config hidden-service
+#	option Name 'sshd'
+#	option Description "Hidden service for ssh"
+#	option Enabled 'false'
+#	option IPv4 '127.0.0.1'
+#	#public port=2222, local port=22
+#	list PublicLocalPort '2222;22'
+
+#config hidden-service
+#	option Name 'nextcloud'
+#	option Description "Hidden service for Nextcloud"
+#	option Enabled 'false'
+#	option IPv4 '127.0.0.1'
+#	option HookScript '/etc/tor/nextcloud-update.sh'
+#	list PublicLocalPort '80;80'

net/tor-hs/files/tor-hs.init

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+#!/bin/sh /etc/rc.common
+
+START=52
+STOP=52
+
+USE_PROCD=1
+
+TORRC_FILE=/etc/tor/torrc_generated # file with torrc config
+HS_DIR_PATH=/etc/tor/hidden_service #hidden service directory path
+TOR_USER=tor
+
+clean_hs() {
+	local name=""
+}
+
+config_tor() {
+	local restart_tor update_config
+	config_get_bool restart_tor "common" RestartTor
+	config_get_bool update_config "common" UpdateTorConf
+
+	tail_conf=$(uci show tor.conf.tail_include 2>/dev/null)
+	head_conf=$(uci show tor.conf.head_include 2>/dev/null)
+	echo "tail_conf $tail_conf"
+
+	if [ "$update_config" = "1" ]; then
+		if [ -n "$(echo $tail_conf | grep $TORRC_FILE)" ] || [ -n "$(echo $head_conf | grep $TORRC_FILE)" ]; then
+			echo "Info. Not updating tor configuration"
+		else
+			#uci add_list
+			echo "Info. Updating tor configuration"
+			uci add_list tor.conf.tail_include="$TORRC_FILE"
+			uci commit tor
+		fi
+	fi
+
+	if [ "$restart_tor" = "1" ]; then
+		/etc/init.d/tor restart
+	fi
+}
+
+handle_hs_ports_conf() {
+	local public_port local_port
+	local value="$1"
+	local ipv4="$2"
+	local name="$3"
+
+	public_port=$(echo "$value"|awk -F';' '{print $1}')
+	local_port=$(echo "$value"|awk -F';' '{print $2}')
+	echo "HiddenServicePort $public_port $ipv4:$local_port">>$TORRC_FILE
+}
+
+parse_hs_conf() {
+	local name public_port local_port enable_hs ipv4
+	local config="$1"
+
+	config_get name "$config" Name
+	config_get description "$config" Description
+
+	config_get_bool enable_hs "$config" Enabled 0
+	config_get ipv4 "$config" IPv4
+
+	if [ "$enable_hs" = "1" ]; then
+		mkdir -p "$HS_DIR_PATH/$name"
+		chown "$TOR_USER":"$TOR_USER" "$HS_DIR_PATH/"
+		chown "$TOR_USER:$TOR_USER" "$HS_DIR_PATH/$name"
+		chmod 700 "$HS_DIR_PATH/"
+		chmod 700 "$HS_DIR_PATH/$name/"
+
+		echo "HiddenServiceDir $HS_DIR_PATH/$name" >>$TORRC_FILE
+		config_list_foreach "$config" PublicLocalPort handle_hs_ports_conf "$ipv4" "$name"
+	fi
+}
+
+parse_hs_conf_hooks() {
+	local name hook_script enable_hs hostname_file
+	local config="$1"
+
+	config_get enable_hs "$config" Enabled 0
+	config_get hook_script "$config" HookScript
+	config_get name "$config" Name
+
+	hostname="$HS_DIR_PATH/$name/hostname"
+
+	# check if we should run hook_script
+	if [ "$enable_hs" = "true" ] && [ -x "$hook_script" ] && [ -f "$hostname" ] ; then
+		hostname_uri=$(cat "$hostname")
+		# call hook script
+		$hook_script "--update-onion" "$hostname_uri"
+	fi
+}
+
+parse_common_conf() {
+	local hs_dir generated_config
+	config_get generated_config "common" GenConf
+	config_get hs_dir "common" HSDir
+	[ -n "$hs_dir" ] && HS_DIR_PATH="$hs_dir"
+	[ -n "$generated_config" ] && TORRC_FILE="$generated_config"
+}
+
+start_service() {
+	config_load tor-hs
+	# clean config
+	echo "" > $TORRC_FILE # clean config
+
+	# load common config
+	parse_common_conf
+
+	# load hs service
+	config_foreach parse_hs_conf hidden-service
+
+	# update tor config
+	config_tor
+
+	# load and run tor-hs hooks
+	config_foreach parse_hs_conf_hooks hidden-service
+}

net/tor-hs/files/tor_rpcd.sh

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+#!/bin/sh
+
+. /lib/functions.sh
+
+get_onion_hostname() {
+	local name="$1"
+	config_get hs_dir common HSDir
+	if [ -f "$hs_dir/$name/hostname" ]; then
+	       cat "$hs_dir/$name/hostname"
+	fi
+}
+
+get_port_list() {
+	local config="$1"
+	config_get ports "$config" PublicLocalPort
+	tmp="$(echo $ports |sed "s| |','|g")"
+	echo -ne "['$tmp']"
+}
+
+parse_hs_conf() {
+	local name description public_port local_port enable_bool public_local_port ipv4
+	local config="$1"
+	local custom="$2"
+
+	config_get name "$config" Name
+	config_get description "$config" Description
+
+	config_get_bool enable_hs "$config" Enabled 0
+	config_get ipv4 "$config" IPv4
+
+	hostname="$(get_onion_hostname $name)"
+	port_list="$(get_port_list $config)"
+	echo "{"
+	echo \"name\":\"$name\",
+	echo \"description\":\"$description\",
+	echo \"enabled\":\"$enable_hs\",
+	echo \"ipv4\":\"$ipv4\",
+	echo \"hostname\":\"$hostname\",
+	echo \"ports\":$port_list
+	echo "},"
+}
+
+get_tor_hs_list() {
+	config_load tor-hs
+	echo "{"
+	echo '"hs-list":['
+	config_foreach parse_hs_conf hidden-service
+	echo "]"
+	echo "}"
+}
+
+
+
+case "$1" in
+	list)
+		echo '{ "list-hs": { } }'
+	;;
+	call)
+		case "$2" in
+			list-hs)
+				# return json object
+				get_tor_hs_list
+			;;
+		esac
+	;;
+esac
+
+
+