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local format = string.format;
local send_s2s = require "core.s2smanager".send_to_host;
local s2s_make_authenticated = require "core.s2smanager".make_authenticated;
local s2s_verify_dialback = require "core.s2smanager".verify_dialback;
local log = require "util.logger".init("mod_dialback");
local xmlns_dialback = "jabber:server:dialback";
add_handler({"s2sin_unauthed", "s2sin"}, "verify", xmlns_dialback,
function (origin, stanza)
-- We are being asked to verify the key, to ensure it was generated by us
log("debug", "verifying dialback key...");
local attr = stanza.attr;
-- FIXME: Grr, ejabberd breaks this one too?? it is black and white in XEP-220 example 34
--if attr.from ~= origin.to_host then error("invalid-from"); end
local type;
if s2s_verify_dialback(attr.id, attr.from, attr.to, stanza[1]) then
type = "valid"
else
type = "invalid"
log("warn", "Asked to verify a dialback key that was incorrect. An imposter is claiming to be %s?", attr.to);
end
log("debug", "verifyied dialback key... it is %s", type);
origin.sends2s(format("<db:verify from='%s' to='%s' id='%s' type='%s'>%s</db:verify>", attr.to, attr.from, attr.id, type, stanza[1]));
end);
add_handler("s2sin_unauthed", "result", xmlns_dialback,
function (origin, stanza)
-- he wants to be identified through dialback
-- We need to check the key with the Authoritative server
local attr = stanza.attr;
local attr = stanza.attr;
origin.from_host = attr.from;
origin.to_host = attr.to;
origin.dialback_key = stanza[1];
log("debug", "asking %s if key %s belongs to them", origin.from_host, origin.dialback_key);
send_s2s(origin.to_host, origin.from_host,
format("<db:verify from='%s' to='%s' id='%s'>%s</db:verify>", origin.to_host, origin.from_host,
origin.streamid, origin.dialback_key));
hosts[origin.to_host].s2sout[origin.from_host].dialback_verifying = origin;
end);
add_handler({ "s2sout_unauthed", "s2sout" }, "verify", xmlns_dialback,
function (origin, stanza)
if origin.dialback_verifying then
local valid;
local attr = stanza.attr;
if attr.type == "valid" then
s2s_make_authenticated(origin.dialback_verifying);
valid = "valid";
else
-- Warn the original connection that is was not verified successfully
log("warn", "dialback for "..(origin.dialback_verifying.from_host or "(unknown)").." failed");
valid = "invalid";
end
if not origin.dialback_verifying.sends2s then
log("warn", "Incoming s2s session was closed in the meantime, so we can't notify it of the db result");
else
origin.dialback_verifying.sends2s(format("<db:result from='%s' to='%s' id='%s' type='%s'>%s</db:result>",
attr.from, attr.to, attr.id, valid, origin.dialback_verifying.dialback_key));
end
end
end);
add_handler({ "s2sout_unauthed", "s2sout" }, "result", xmlns_dialback,
function (origin, stanza)
if stanza.attr.type == "valid" then
s2s_make_authenticated(origin);
else
-- FIXME
error("dialback failed!");
end
end);
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