view mod_password_reset/mod_password_reset.lua @ 3492:f59334da6df9

mod_conversejs: Show fallback text if converse.js fails to load (thanks MattJ) This can happen if javascript is enabled but 3rd party resources are blocked, or some other error happened.
author Kim Alvefur <zash@zash.se>
date Tue, 19 Mar 2019 19:43:13 +0100
parents 3bc68057f232
children b059a3fb2a58
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local adhoc_new = module:require "adhoc".new;
local adhoc_simple_form = require "util.adhoc".new_simple_form;
local new_token = require "util.id".long;
local new_error_id = require "util.id".short;
local jid_prepped_split = require "util.jid".prepped_split;
local http_formdecode = require "net.http".formdecode;
local usermanager = require "core.usermanager";
local dataforms_new = require "util.dataforms".new;
local st = require "util.stanza";
local apply_template = require"util.interpolation".new("%b{}", st.xml_escape);
local tostring = tostring;

local reset_tokens = module:open_store();

local max_token_age = module:get_option_number("password_reset_validity", 86400);

local serve = module:depends"http_files".serve;

module:depends("adhoc");
module:depends("http");
local password_policy = module:depends("password_policy");

local form_template = assert(module:load_resource("password_reset/password_reset.html")):read("*a");
local result_template = assert(module:load_resource("password_reset/password_result.html")):read("*a");

function generate_page(event)
	local request, response = event.request, event.response;

	local token = request.url.query;
	local reset_info = token and reset_tokens:get(token);

	response.headers.content_type = "text/html; charset=utf-8";

	if not reset_info or os.difftime(os.time(), reset_info.generated_at) > max_token_age then
		module:log("warn", "Expired token: %s", token or "<none>");
		return apply_template(result_template, { classes = "alert-danger", message = "This link has expired." })
	end

	return apply_template(form_template, {
		jid = reset_info.user.."@"..module.host;
		token = token;
		min_password_length = password_policy.get_policy().length;
	});
end

function handle_form(event)
	local request, response = event.request, event.response;
	local form_data = http_formdecode(request.body);
	local password, token = form_data["password"], form_data["token"];

	local reset_info = reset_tokens:get(token);

	response.headers.content_type = "text/html; charset=utf-8";

	if not reset_info or os.difftime(os.time(), reset_info.generated_at) > max_token_age then
		return apply_template(result_template, { classes = "alert-danger", message = "This link has expired." })
	end

	local policy_ok, policy_err = password_policy.check_password(password);
	if not policy_ok then
		return apply_template(form_template, {
			classes = "alert-danger", message = "Unsuitable password: "..policy_err;
			jid = reset_info.user.."@"..module.host;
			token = token;
			min_password_length = password_policy.get_policy().length;
		})
	end

	local ok, err = usermanager.set_password(reset_info.user, password, module.host);

	if ok then
		reset_tokens:set(token, nil);

		return apply_template(result_template, { classes = "alert-success",
			message = "Your password has been updated! Happy chatting :)" })
	else
		local error_id = new_error_id();
		module:log("warn", "Resetting password for %s failed: %s [%s]", reset_info.user, err, error_id);
		return apply_template(result_template, {
			classes = "alert-danger";
			message = "An unknown error has occurred. Please contact your administrator and quote error id '"..error_id.."'";
		})
	end
end

module:provides("http", {
	route = {
		["GET /bootstrap.min.css"] = serve(module:get_directory() .. "/password_reset/bootstrap.min.css");
		["GET /reset"] = generate_page;
		["POST /reset"] = handle_form;
	};
});

-- Changing a user's password
local reset_password_layout = dataforms_new{
	title = "Generate password reset link";
	instructions = "Please enter the details of the user who needs a reset link.";

	{ name = "FORM_TYPE", type = "hidden", value = "http://prosody.im/protocol/adhoc/mod_password_reset" };
	{ name = "accountjid", type = "jid-single", required = true, label = "JID" };
};

local reset_command_handler = adhoc_simple_form(reset_password_layout, function (data, errors)
	if errors then
		local errmsg = {};
		for name, text in pairs(errors) do
			errmsg[#errmsg + 1] = name .. ": " .. text;
		end
		return { status = "completed", error = { message = table.concat(errmsg, "\n") } };
	end

	local jid = data.accountjid;
	local user, host = jid_prepped_split(jid);

	if host ~= module.host then
		return {
			status = "completed";
			error = { message = "You may only generate password reset links for users on "..module.host.."." };
		};
	end

	local token = new_token();
	reset_tokens:set(token, {
		generated_at = os.time();
		user = user;
	});

	return { info = module:http_url() .. "/reset?" .. token, status = "completed" };
end);

local adhoc_reset = adhoc_new(
	"Generate password reset link",
	"password_reset",
	reset_command_handler,
	"admin"
);

module:add_item("adhoc", adhoc_reset);