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local st = require "util.stanza";
local jid_split = require "util.jid".split;
local jid_bare = require "util.jid".bare;
local rostermanager = require "core.rostermanager";
local require_encryption = module:get_option_boolean("c2s_require_encryption",
module:get_option_boolean("require_encryption", false));
local invite_only = module:get_option_boolean("registration_invite_only", true);
local invites;
if prosody.process_type == "prosody" then
invites = module:depends("invites");
end
local legacy_invite_stream_feature = st.stanza("register", { xmlns = "urn:xmpp:invite" }):up();
local invite_stream_feature = st.stanza("register", { xmlns = "urn:xmpp:ibr-token:0" }):up();
module:hook("stream-features", function(event)
local session, features = event.origin, event.features;
-- Advertise to unauthorized clients only.
if session.type ~= "c2s_unauthed" or (require_encryption and not session.secure) then
return
end
features:add_child(legacy_invite_stream_feature);
features:add_child(invite_stream_feature);
end);
-- XEP-0379: Pre-Authenticated Roster Subscription
module:hook("presence/bare", function (event)
local stanza = event.stanza;
if stanza.attr.type ~= "subscribe" then return end
local preauth = stanza:get_child("preauth", "urn:xmpp:pars:0");
if not preauth then return end
local token = preauth.attr.token;
if not token then return end
local username, host = jid_split(stanza.attr.to);
local invite, err = invites.get(token, username);
if not invite then
module:log("debug", "Got invalid token, error: %s", err);
return;
end
local contact = jid_bare(stanza.attr.from);
module:log("debug", "Approving inbound subscription to %s from %s", username, contact);
if rostermanager.set_contact_pending_in(username, host, contact, stanza) then
if rostermanager.subscribed(username, host, contact) then
invite:use();
rostermanager.roster_push(username, host, contact);
-- Send back a subscription request (goal is mutual subscription)
if not rostermanager.is_user_subscribed(username, host, contact)
and not rostermanager.is_contact_pending_out(username, host, contact) then
module:log("debug", "Sending automatic subscription request to %s from %s", contact, username);
if rostermanager.set_contact_pending_out(username, host, contact) then
rostermanager.roster_push(username, host, contact);
module:send(st.presence({type = "subscribe", from = username.."@"..host, to = contact }));
else
module:log("warn", "Failed to set contact pending out for %s", username);
end
end
end
end
end, 1);
-- Client is submitting a preauth token to allow registration
module:hook("stanza/iq/urn:xmpp:pars:0:preauth", function(event)
local preauth = event.stanza.tags[1];
local token = preauth.attr.token;
local validated_invite = invites.get(token);
if not validated_invite then
local reply = st.error_reply(event.stanza, "cancel", "forbidden", "The invite token is invalid or expired");
event.origin.send(reply);
return true;
end
event.origin.validated_invite = validated_invite;
local reply = st.reply(event.stanza);
event.origin.send(reply);
return true;
end);
-- Registration attempt - ensure a valid preauth token has been supplied
module:hook("user-registering", function (event)
local validated_invite = event.validated_invite or (event.session and event.session.validated_invite);
if invite_only and not validated_invite then
event.allowed = false;
event.reason = "Registration on this server is through invitation only";
return;
elseif not validated_invite then
-- This registration is not using an invite, but
-- the server is not in invite-only mode, so nothing
-- for this module to do...
return;
end
if validated_invite and validated_invite.additional_data and validated_invite.additional_data.allow_reset then
event.allow_reset = validated_invite.additional_data.allow_reset;
end
end);
-- Make a *one-way* subscription. User will see when contact is online,
-- contact will not see when user is online.
function subscribe(host, user_username, contact_username)
local user_jid = user_username.."@"..host;
local contact_jid = contact_username.."@"..host;
-- Update user's roster to say subscription request is pending...
rostermanager.set_contact_pending_out(user_username, host, contact_jid);
-- Update contact's roster to say subscription request is pending...
rostermanager.set_contact_pending_in(contact_username, host, user_jid);
-- Update contact's roster to say subscription request approved...
rostermanager.subscribed(contact_username, host, user_jid);
-- Update user's roster to say subscription request approved...
rostermanager.process_inbound_subscription_approval(user_username, host, contact_jid);
end
-- Make a mutual subscription between jid1 and jid2. Each JID will see
-- when the other one is online.
function subscribe_both(host, user1, user2)
subscribe(host, user1, user2);
subscribe(host, user2, user1);
end
-- Registration successful, if there was a preauth token, mark it as used
module:hook("user-registered", function (event)
local validated_invite = event.validated_invite or (event.session and event.session.validated_invite);
if not validated_invite then
return;
end
local inviter_username = validated_invite.inviter;
local contact_username = event.username;
validated_invite:use();
if inviter_username then
module:log("debug", "Creating mutual subscription between %s and %s", inviter_username, contact_username);
subscribe_both(module.host, inviter_username, contact_username);
end
if validated_invite.additional_data then
module:log("debug", "Importing roles from invite");
local roles = validated_invite.additional_data.roles;
if roles then
module:open_store("roles"):set(contact_username, roles);
end
end
end);
-- Equivalent of user-registered but for when the account already existed
-- (i.e. password reset)
module:hook("user-password-reset", function (event)
local validated_invite = event.validated_invite or (event.session and event.session.validated_invite);
if not validated_invite then
return;
end
validated_invite:use();
end);
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