mod_voipms: New Module to send and receive SMS/MMS via VoIP.ms APIs. diff --git a/mod_voipms/README.md b/mod_voipms/README.md new file mode 100644 --- /dev/null +++ b/mod_voipms/README.md @@ -0,0 +1,51 @@ +--- +labels: +- 'Stage-Alpha' +- 'Type-Web' +summary: Send and receive SMS/MMS via VoIP.ms APIs. +rockspec: + build: + modules: + mod_voipms: mod_voipms.lua +... + +Introduction +============ + +This is a Prosody module to map JIDs to DIDs on VoIP.ms and support sending/receiving SMS/MMS. + +Configuration +============= + +| option | type | default | +|-----------------------|--------|---------| +| voipms\_api\_username | string | nil | +| voipms\_api\_password | string | nil | +| voipms\_query\_key | string | nil | +| voipms\_jid\_map | table | nil | +``` +VirtualHost "sms.example.com" +modules_enabled = { + "voipms"; +} +voipms_api_username = john@example.com -- E-mail registered with VoIP.ms +voipms_api_password = abcd1234 -- API password configured in VoIP.ms +voipms_query_key = some_query_key -- query param 'key' part of your URL callback +voipms_jid_map = { + ["your_jid@your_domain.com"] = "+1234567890" +} +``` + +HTTP +==== + +The module is served on Prosody's default HTTP ports at the path /voipms. More details on configuring HTTP modules in Prosody can be found in the HTTP documentation. + +VoIP.ms Webhook URL +=================== + +This module receives the VoIP.ms Webhook URL (POST) at the /voipms endpoint. It uses the sendSMS/sendMMS GET methods against the VoIP.ms APIs. This is an example webhook to use in VoIP.ms: + +``` +https://sms.example.com/voipms?key=some_query_key +``` diff --git a/mod_voipms/mod_voipms.lua b/mod_voipms/mod_voipms.lua new file mode 100644 --- /dev/null +++ b/mod_voipms/mod_voipms.lua @@ -0,0 +1,166 @@ +local http = require "net.http" +local json = require "util.json" +local st = require "util.stanza" + +local api_username = module:get_option_string("voipms_api_username") +local api_password = module:get_option_string("voipms_api_password") +local query_key = module:get_option("voipms_query_key") +local jid_map = module:get_option("voipms_jid_map") or {} +local rest_endpoint = "https://voip.ms/api/v1/rest.php" + +if not api_username or not api_password or not query_key then + module:log("error", "Missing required config values (voipms_api_username, voipms_api_password, voipms_query_key)") + return +end + +module:depends("http") + +local function normalize_number(num) + if not num then return nil end + if num:sub(1, 1) ~= "+" then + return "+1" .. num + end + return num +end + +local function extract_query_key(event) + return (event.request.url.query or ""):match("key=([^&]+)") +end + +module:provides("http", { + route = { + ["POST"] = function(event) + local req = event.request + local body = req.body or "" + + if extract_query_key(event) ~= query_key then + module:log("warn", "Unauthorized webhook: missing or invalid key") + return { status_code = 403 } + end + + local json_payload, err = json.decode(body) + if not json_payload then + module:log("warn", "Invalid JSON: %s", err or "unknown error") + return { status_code = 400 } + end + + local payload = json_payload.data and json_payload.data.payload + if not payload then + module:log("warn", "Missing payload in JSON") + return { status_code = 400 } + end + + local from = payload.from and payload.from.phone_number + local to_list = payload.to or {} + local to = #to_list > 0 and to_list[1].phone_number or nil + + if not from or not to then + module:log("warn", "Missing phone numbers (from: %s, to: %s)", tostring(from), tostring(to)) + return { status_code = 400 } + end + + local normalized_to = normalize_number(to) + local target_jid = nil + + for jid, did in pairs(jid_map) do + if normalize_number(did) == normalized_to then + target_jid = jid + break + end + end + + if not target_jid then + module:log("warn", "No JID mapping for DID %s", normalized_to) + return { status_code = 404 } + end + + local normalized_from = normalize_number(from) + local message_text = payload.text or "" + + local message = st.message({ + from = normalized_from .. "@" .. module.host, + to = target_jid, + type = "chat" + }):tag("body"):text(message_text):up() + + if payload.media and #payload.media > 0 then + for _, media_item in ipairs(payload.media) do + if media_item.url then + message_text = message_text .. "\n" .. media_item.url + message:tag("x", { xmlns = "jabber:x:oob" }) + :tag("url"):text(media_item.url):up():up() + end + end + end + + module:send(message) + module:log("info", "Delivered SMS from %s to %s", normalized_from, target_jid) + + return { status_code = 204 } + end + } +}) + +module:hook("message/bare", function(event) + local stanza = event.stanza + if stanza.attr.type ~= "chat" then return end + + local from_jid = stanza.attr.from + local to_jid = stanza.attr.to + local body = stanza:get_child_text("body") + if not body or body == "" then return end + + local from_number = jid_map[from_jid] + if not from_number then + module:log("warn", "No DID mapping for JID %s", from_jid) + return + end + + local to_number = to_jid:match("^([^@]+)") + if not to_number then + module:log("warn", "Malformed JID in message.to: %s", to_jid) + return + end + + to_number = normalize_number(to_number) + + local media_urls = {} + for line in body:gmatch("[^\r\n]+") do + if line:match("^https?://") then + table.insert(media_urls, line) + end + end + + local method = (#media_urls > 0) and "sendMMS" or "sendSMS" + local query = { + api_username = api_username, + api_password = api_password, + method = method, + did = from_number, + dst = to_number, + message = body + } + + if method == "sendMMS" then + for i, url in ipairs(media_urls) do + query["media_url[" .. (i - 1) .. "]"] = url + end + end + + local query_str = http.formencode(query) + + http.request(rest_endpoint .. "?" .. query_str, { + method = "GET"; + }, function(response_body, code) + if code == 200 then + local resp, err = json.decode(response_body) + if not resp or resp.status ~= "success" then + module:log("error", "Failed to send %s: %s", method, err or (resp and resp.status) or "unknown") + else + module:log("info", "Sent %s from %s to %s", method, from_number, to_number) + end + else + module:log("error", "HTTP error sending %s: code %s", method, tostring(code)) + end + end) +end)

local array = require "util.array";
local jid = require "util.jid";
local set = require "util.set";
local st = require "util.stanza";
local url_escape = require "util.http".urlencode;

local base_url = "https://"..module.host.."/";

local render_html_template = require"util.interpolation".new("%b{}", st.xml_escape, {
	urlescape = url_escape;
	lower = string.lower;
	classname = function (s) return (s:gsub("%W+", "-")); end;
	relurl = function (s)
		if s:match("^%w+://") then
			return s;
		end
		return base_url.."/"..s;
	end;
});
local render_url = require "util.interpolation".new("%b{}", url_escape, {
	urlescape = url_escape;
	noscheme = function (url)
		return (url:gsub("^[^:]+:", ""));
	end;
});

local mod_pep = module:depends("pep");

local mam = module:open_store("archive", "archive");

local function get_user_omemo_info(username)
	local everything_valid = true;
	local any_device = false;
	local omemo_status = {};
	local omemo_devices;
	local pep_service = mod_pep.get_pep_service(username);
	if pep_service and pep_service.nodes then
		local ok, _, device_list = pep_service:get_last_item("eu.siacs.conversations.axolotl.devicelist", true);
		if ok and device_list then
			device_list = device_list:get_child("list", "eu.siacs.conversations.axolotl");
		end
		if device_list then
			omemo_devices = {};
			for device_entry in device_list:childtags("device") do
				any_device = true;
				local device_info = {};
				local device_id = tonumber(device_entry.attr.id or "");
				if device_id then
					device_info.id = device_id;
					local bundle_id = ("eu.siacs.conversations.axolotl.bundles:%d"):format(device_id);
					local have_bundle, _, bundle = pep_service:get_last_item(bundle_id, true);
					if have_bundle and bundle and bundle:get_child("bundle", "eu.siacs.conversations.axolotl") then
						device_info.have_bundle = true;
						local config_ok, bundle_config = pep_service:get_node_config(bundle_id, true);
						if config_ok and bundle_config then
							device_info.bundle_config = bundle_config;
							if bundle_config.max_items == 1
							and bundle_config.access_model == "open"
							and bundle_config.persist_items == true
							and bundle_config.publish_model == "publishers" then
								device_info.valid = true;
							end
						end
					end
				end
				if device_info.valid == nil then
					device_info.valid = false;
					everything_valid = false;
				end
				table.insert(omemo_devices, device_info);
			end

			local config_ok, list_config = pep_service:get_node_config("eu.siacs.conversations.axolotl.devicelist", true);
			if config_ok and list_config then
				omemo_status.config = list_config;
				if list_config.max_items == 1
				and list_config.access_model == "open"
				and list_config.persist_items == true
				and list_config.publish_model == "publishers" then
					omemo_status.config_valid = true;
				end
			end
			if omemo_status.config_valid == nil then
				omemo_status.config_valid = false;
				everything_valid = false;
			end
		end
	end
	omemo_status.valid = everything_valid and any_device;
	return {
		status = omemo_status;
		devices = omemo_devices;
	};
end

local access_model_text = {
	open = "Public";
	whitelist = "Private";
	roster = "Contacts only";
	presence = "Contacts only";
};

local function get_message(username, message_id)
	if mam.get then
		return mam:get(username, message_id);
	end
	-- COMPAT
	local message;
	for _, result in mam:find(username, { key = message_id }) do
		message = result;
	end
	return message;
end

local function render_message(event, path)
	local username, message_id = path:match("^([^/]+)/(.+)$");
	if not username then
		return 400;
	end
	local message = get_message(username, message_id);
	if not message then
		return 404;
	end

	local user_omemo_status = get_user_omemo_info(username);

	local user_rids = set.new(array.pluck(user_omemo_status.devices or {}, "id")) / tostring;

	local message_omemo_header = message:find("{eu.siacs.conversations.axolotl}encrypted/header");
	local message_rids = set.new();
	local rid_info = {};
	if message_omemo_header then
		for key_el in message_omemo_header:childtags("key") do
			local rid = key_el.attr.rid;
			if rid then
				message_rids:add(rid);
				local prekey = key_el.attr.prekey;
				rid_info = {
					prekey = prekey and (prekey == "1" or prekey:lower() == "true");
				};
			end
		end
	end

	local rids = user_rids + message_rids;

	local direction = jid.bare(message.attr.to) == (username.."@"..module.host) and "incoming" or "outgoing";

	local is_encrypted = not not message_omemo_header;

	local sender_id = message_omemo_header and message_omemo_header.attr.sid or nil;

	local f = module:load_resource("view.tpl.html");
	if not f then
		return 500;
	end
	local tpl = f:read("*a");

	local data = { user = username, rids = {} };
	for rid in rids do
		data.rids[rid] = {
			status = message_rids:contains(rid) and "Encrypted" or user_rids:contains(rid) and "Missing" or nil;
			prekey = rid_info.prekey;
		};
	end

	data.message = {
		type = message.attr.type or "normal";
		direction = direction;
		encryption = is_encrypted and "encrypted" or "unencrypted";
		has_any_keys = not message_rids:empty();
		has_no_keys = message_rids:empty();
	};

	data.omemo = {
		sender_id = sender_id;
		status = user_omemo_status.status.valid and "no known issues" or "problems";
	};

	data.omemo.devices = {};
	if user_omemo_status.devices then
		for _, device_info in ipairs(user_omemo_status.devices) do
			data.omemo.devices[("%d"):format(device_info.id)] = {
				status = device_info.valid and "OK" or "Problem";
				bundle = device_info.have_bundle and "Published" or "Missing";
				access_model = access_model_text[device_info.bundle_config and device_info.bundle_config.access_model or nil];
			};
		end
	else
		data.omemo.devices[false] = { status = "No devices have published OMEMO keys on this account" };
	end

	event.response.headers.content_type = "text/html; charset=utf-8";
	return render_html_template(tpl, data);
end

local function check_omemo_fallback(event)
	local message = event.stanza;

	local message_omemo_header = message:find("{eu.siacs.conversations.axolotl}encrypted/header");
	if not message_omemo_header then return; end

	local to_bare = jid.bare(message.attr.to);

	local archive_stanza_id;
	for stanza_id_tag in message:childtags("stanza-id", "urn:xmpp:sid:0") do
		if stanza_id_tag.attr.by == to_bare then
			archive_stanza_id = stanza_id_tag.attr.id;
		end
	end
	if not archive_stanza_id then
		return;
	end

	local debug_url = render_url(module:http_url().."/view/{username}/{message_id}", {
		username = jid.node(to_bare);
		message_id = archive_stanza_id;
	});

	local body = message:get_child("body");
	if not body then
		body = st.stanza("body")
			:text("This message is encrypted using OMEMO, but could not be decrypted by your device.\nFor more information see: "..debug_url);
		message:reset():add_child(body);
	else
		body:text("\n\nOMEMO debug information: "..debug_url);
	end
end

module:hook("message/bare", check_omemo_fallback, -0.5);
module:hook("message/full", check_omemo_fallback, -0.5);

module:depends("http")
module:provides("http", {
	route = {
		["GET /view/*"] = render_message;
	};
});