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-rw-r--r--core/certmanager.lua6
-rw-r--r--core/s2smanager.lua41
-rw-r--r--plugins/mod_admin_telnet.lua108
-rw-r--r--plugins/mod_dialback.lua14
-rw-r--r--plugins/mod_pubsub.lua312
-rw-r--r--plugins/mod_saslauth.lua132
-rw-r--r--util/pubsub.lua245
-rw-r--r--util/x509.lua211
8 files changed, 1061 insertions, 8 deletions
diff --git a/core/certmanager.lua b/core/certmanager.lua
index 7f1ca42e..0dc0bfd4 100644
--- a/core/certmanager.lua
+++ b/core/certmanager.lua
@@ -22,6 +22,8 @@ module "certmanager"
-- Global SSL options if not overridden per-host
local default_ssl_config = configmanager.get("*", "core", "ssl");
local default_capath = "/etc/ssl/certs";
+local default_verify = (ssl and ssl.x509 and { "peer", "client_once", "continue", "ignore_purpose" }) or "none";
+local default_options = { "no_sslv2" };
function create_context(host, mode, user_ssl_config)
user_ssl_config = user_ssl_config or default_ssl_config;
@@ -37,8 +39,8 @@ function create_context(host, mode, user_ssl_config)
certificate = resolve_path(config_path, user_ssl_config.certificate);
capath = resolve_path(config_path, user_ssl_config.capath or default_capath);
cafile = resolve_path(config_path, user_ssl_config.cafile);
- verify = user_ssl_config.verify or "none";
- options = user_ssl_config.options or "no_sslv2";
+ verify = user_ssl_config.verify or default_verify;
+ options = user_ssl_config.options or default_options;
ciphers = user_ssl_config.ciphers;
depth = user_ssl_config.depth;
};
diff --git a/core/s2smanager.lua b/core/s2smanager.lua
index c6e6df8e..2f6c8478 100644
--- a/core/s2smanager.lua
+++ b/core/s2smanager.lua
@@ -27,6 +27,7 @@ local modulemanager = require "core.modulemanager";
local st = require "stanza";
local stanza = st.stanza;
local nameprep = require "util.encodings".stringprep.nameprep;
+local cert_verify_identity = require "util.x509".verify_identity;
local fire_event = prosody.events.fire_event;
local uuid_gen = require "util.uuid".generate;
@@ -373,16 +374,47 @@ function session_open_stream(session, from, to)
from=from, to=to, version='1.0', ["xml:lang"]='en'}):top_tag());
end
+local function check_cert_status(session)
+ local conn = session.conn:socket()
+ local cert
+ if conn.getpeercertificate then
+ cert = conn:getpeercertificate()
+ end
+
+ if cert then
+ local chain_valid, err = conn:getpeerchainvalid()
+ if not chain_valid then
+ session.cert_chain_status = "invalid";
+ (session.log or log)("debug", "certificate chain validation result: %s", err);
+ else
+ session.cert_chain_status = "valid";
+
+ local host = session.direction == "incoming" and session.from_host or session.to_host
+
+ -- We'll go ahead and verify the asserted identity if the
+ -- connecting server specified one.
+ if host then
+ if cert_verify_identity(host, "xmpp-server", cert) then
+ session.cert_identity_status = "valid"
+ else
+ session.cert_identity_status = "invalid"
+ end
+ end
+ end
+ end
+end
+
function streamopened(session, attr)
local send = session.sends2s;
-- TODO: #29: SASL/TLS on s2s streams
session.version = tonumber(attr.version) or 0;
+ -- TODO: Rename session.secure to session.encrypted
if session.secure == false then
session.secure = true;
end
-
+
if session.direction == "incoming" then
-- Send a reply stream header
session.to_host = attr.to and nameprep(attr.to);
@@ -407,6 +439,9 @@ function streamopened(session, attr)
return;
end
end
+
+ if session.secure and not session.cert_chain_status then check_cert_status(session); end
+
send("<?xml version='1.0'?>");
send(stanza("stream:stream", { xmlns='jabber:server', ["xmlns:db"]='jabber:server:dialback',
["xmlns:stream"]='http://etherx.jabber.org/streams', id=session.streamid, from=session.to_host, to=session.from_host, version=(session.version > 0 and "1.0" or nil) }):top_tag());
@@ -426,7 +461,9 @@ function streamopened(session, attr)
-- If we are just using the connection for verifying dialback keys, we won't try and auth it
if not attr.id then error("stream response did not give us a streamid!!!"); end
session.streamid = attr.id;
-
+
+ if session.secure and not session.cert_chain_status then check_cert_status(session); end
+
-- Send unauthed buffer
-- (stanzas which are fine to send before dialback)
-- Note that this is *not* the stanza queue (which
diff --git a/plugins/mod_admin_telnet.lua b/plugins/mod_admin_telnet.lua
index 712e9eb7..da40f57e 100644
--- a/plugins/mod_admin_telnet.lua
+++ b/plugins/mod_admin_telnet.lua
@@ -19,6 +19,7 @@ local console_listener = { default_port = 5582; default_mode = "*l"; default_int
require "util.iterators";
local jid_bare = require "util.jid".bare;
local set, array = require "util.set", require "util.array";
+local cert_verify_identity = require "util.x509".verify_identity;
local commands = {};
local def_env = {};
@@ -498,7 +499,7 @@ function def_env.s2s:show(match_jid)
for remotehost, session in pairs(host_session.s2sout) do
if (not match_jid) or remotehost:match(match_jid) or host:match(match_jid) then
count_out = count_out + 1;
- print(" "..host.." -> "..remotehost..(session.secure and " (encrypted)" or "")..(session.compressed and " (compressed)" or ""));
+ print(" "..host.." -> "..remotehost..(session.cert_identity_status == "valid" and " (secure)" or "")..(session.secure and " (encrypted)" or "")..(session.compressed and " (compressed)" or ""));
if session.sendq then
print(" There are "..#session.sendq.." queued outgoing stanzas for this connection");
end
@@ -535,7 +536,7 @@ function def_env.s2s:show(match_jid)
-- Pft! is what I say to list comprehensions
or (session.hosts and #array.collect(keys(session.hosts)):filter(subhost_filter)>0)) then
count_in = count_in + 1;
- print(" "..host.." <- "..(session.from_host or "(unknown)")..(session.secure and " (encrypted)" or "")..(session.compressed and " (compressed)" or ""));
+ print(" "..host.." <- "..(session.from_host or "(unknown)")..(session.cert_identity_status == "valid" and " (secure)" or "")..(session.secure and " (encrypted)" or "")..(session.compressed and " (compressed)" or ""));
if session.type == "s2sin_unauthed" then
print(" Connection not yet authenticated");
end
@@ -561,6 +562,109 @@ function def_env.s2s:show(match_jid)
return true, "Total: "..count_out.." outgoing, "..count_in.." incoming connections";
end
+local function print_subject(print, subject)
+ for _, entry in ipairs(subject) do
+ print(
+ (" %s: %q"):format(
+ entry.name or entry.oid,
+ entry.value:gsub("[\r\n%z%c]", " ")
+ )
+ );
+ end
+end
+
+function def_env.s2s:showcert(domain)
+ local ser = require "util.serialization".serialize;
+ local print = self.session.print;
+ local domain_sessions = set.new(array.collect(keys(incoming_s2s)))
+ /function(session) return session.from_host == domain; end;
+ for local_host in values(prosody.hosts) do
+ local s2sout = local_host.s2sout;
+ if s2sout and s2sout[domain] then
+ domain_sessions:add(s2sout[domain]);
+ end
+ end
+ local cert_set = {};
+ for session in domain_sessions do
+ local conn = session.conn;
+ conn = conn and conn:socket();
+ if not conn.getpeercertificate then
+ if conn.dohandshake then
+ error("This version of LuaSec does not support certificate viewing");
+ end
+ else
+ local cert = conn:getpeercertificate();
+ if cert then
+ local digest = cert:digest("sha1");
+ if not cert_set[digest] then
+ local chain_valid, chain_err = conn:getpeerchainvalid();
+ cert_set[digest] = {
+ {
+ from = session.from_host,
+ to = session.to_host,
+ direction = session.direction
+ };
+ chain_valid = chain_valid;
+ chain_err = chain_err;
+ cert = cert;
+ };
+ else
+ table.insert(cert_set[digest], {
+ from = session.from_host,
+ to = session.to_host,
+ direction = session.direction
+ });
+ end
+ end
+ end
+ end
+ local domain_certs = array.collect(values(cert_set));
+ -- Phew. We now have a array of unique certificates presented by domain.
+ local print = self.session.print;
+ local n_certs = #domain_certs;
+
+ if n_certs == 0 then
+ return "No certificates found for "..domain;
+ end
+
+ local function _capitalize_and_colon(byte)
+ return string.upper(byte)..":";
+ end
+ local function pretty_fingerprint(hash)
+ return hash:gsub("..", _capitalize_and_colon):sub(1, -2);
+ end
+
+ for cert_info in values(domain_certs) do
+ local cert = cert_info.cert;
+ print("---")
+ print("Fingerprint (SHA1): "..pretty_fingerprint(cert:digest("sha1")));
+ print("");
+ local n_streams = #cert_info;
+ print("Currently used on "..n_streams.." stream"..(n_streams==1 and "" or "s")..":");
+ for _, stream in ipairs(cert_info) do
+ if stream.direction == "incoming" then
+ print(" "..stream.to.." <- "..stream.from);
+ else
+ print(" "..stream.from.." -> "..stream.to);
+ end
+ end
+ print("");
+ local chain_valid, err = cert_info.chain_valid, cert_info.chain_err;
+ local valid_identity = cert_verify_identity(domain, "xmpp-server", cert);
+ print("Trusted certificate: "..(chain_valid and "Yes" or ("No ("..err..")")));
+ print("Issuer: ");
+ print_subject(print, cert:issuer());
+ print("");
+ print("Valid for "..domain..": "..(valid_identity and "Yes" or "No"));
+ print("Subject:");
+ print_subject(print, cert:subject());
+ end
+ print("---");
+ return ("Showing "..n_certs.." certificate"
+ ..(n_certs==1 and "" or "s")
+ .." presented by "..domain..".");
+end
+
function def_env.s2s:close(from, to)
local print, count = self.session.print, 0;
diff --git a/plugins/mod_dialback.lua b/plugins/mod_dialback.lua
index e1fd5a42..a8923e27 100644
--- a/plugins/mod_dialback.lua
+++ b/plugins/mod_dialback.lua
@@ -132,9 +132,19 @@ module:hook("stanza/jabber:server:dialback:result", function(event)
end
end);
+module:hook_stanza("urn:ietf:params:xml:ns:xmpp-sasl", "failure", function (origin, stanza)
+ if origin.external_auth == "failed" then
+ module:log("debug", "SASL EXTERNAL failed, falling back to dialback");
+ s2s_initiate_dialback(origin);
+ return true;
+ end
+end, 100);
+
module:hook_stanza(xmlns_stream, "features", function (origin, stanza)
- s2s_initiate_dialback(origin);
- return true;
+ if not origin.external_auth or origin.external_auth == "failed" then
+ s2s_initiate_dialback(origin);
+ return true;
+ end
end, 100);
-- Offer dialback to incoming hosts
diff --git a/plugins/mod_pubsub.lua b/plugins/mod_pubsub.lua
new file mode 100644
index 00000000..841de147
--- /dev/null
+++ b/plugins/mod_pubsub.lua
@@ -0,0 +1,312 @@
+local pubsub = require "util.pubsub";
+local st = require "util.stanza";
+local jid_bare = require "util.jid".bare;
+local uuid_generate = require "util.uuid".generate;
+
+require "core.modulemanager".load(module.host, "iq");
+
+local xmlns_pubsub = "http://jabber.org/protocol/pubsub";
+local xmlns_pubsub_errors = "http://jabber.org/protocol/pubsub#errors";
+local xmlns_pubsub_event = "http://jabber.org/protocol/pubsub#event";
+
+local autocreate_on_publish = module:get_option_boolean("autocreate_on_publish", false);
+local autocreate_on_subscribe = module:get_option_boolean("autocreate_on_subscribe", false);
+
+local service;
+
+local handlers = {};
+
+function handle_pubsub_iq(event)
+ local origin, stanza = event.origin, event.stanza;
+ local pubsub = stanza.tags[1];
+ local action = pubsub.tags[1];
+ local handler = handlers[stanza.attr.type.."_"..action.name];
+ if handler then
+ handler(origin, stanza, action);
+ return true;
+ end
+end
+
+local pubsub_errors = {
+ ["conflict"] = { "cancel", "conflict" };
+ ["invalid-jid"] = { "modify", "bad-request", nil, "invalid-jid" };
+ ["item-not-found"] = { "cancel", "item-not-found" };
+ ["not-subscribed"] = { "modify", "unexpected-request", nil, "not-subscribed" };
+ ["forbidden"] = { "cancel", "forbidden" };
+};
+function pubsub_error_reply(stanza, error)
+ local e = pubsub_errors[error];
+ local reply = st.error_reply(stanza, unpack(e, 1, 3));
+ if e[4] then
+ reply:tag(e[4], { xmlns = xmlns_pubsub_errors }):up();
+ end
+ return reply;
+end
+
+function handlers.get_items(origin, stanza, items)
+ local node = items.attr.node;
+ local item = items:get_child("item");
+ local id = item and item.attr.id;
+
+ local ok, results = service:get_items(node, stanza.attr.from, id);
+ if not ok then
+ return origin.send(pubsub_error_reply(stanza, results));
+ end
+
+ local data = st.stanza("items", { node = node });
+ for _, entry in pairs(results) do
+ data:add_child(entry);
+ end
+ if data then
+ reply = st.reply(stanza)
+ :tag("pubsub", { xmlns = xmlns_pubsub })
+ :add_child(data);
+ else
+ reply = pubsub_error_reply(stanza, "item-not-found");
+ end
+ return origin.send(reply);
+end
+
+function handlers.set_create(origin, stanza, create)
+ local node = create.attr.node;
+ local ok, ret, reply;
+ if node then
+ ok, ret = service:create(node, stanza.attr.from);
+ if ok then
+ reply = st.reply(stanza);
+ else
+ reply = pubsub_error_reply(stanza, ret);
+ end
+ else
+ repeat
+ node = uuid_generate();
+ ok, ret = service:create(node, stanza.attr.from);
+ until ok or ret ~= "conflict";
+ if ok then
+ reply = st.reply(stanza)
+ :tag("pubsub", { xmlns = xmlns_pubsub })
+ :tag("create", { node = node });
+ else
+ reply = pubsub_error_reply(stanza, ret);
+ end
+ end
+ return origin.send(reply);
+end
+
+function handlers.set_subscribe(origin, stanza, subscribe)
+ local node, jid = subscribe.attr.node, subscribe.attr.jid;
+ if jid_bare(jid) ~= jid_bare(stanza.attr.from) then
+ return origin.send(pubsub_error_reply(stanza, "invalid-jid"));
+ end
+ local ok, ret = service:add_subscription(node, stanza.attr.from, jid);
+ local reply;
+ if ok then
+ reply = st.reply(stanza)
+ :tag("pubsub", { xmlns = xmlns_pubsub })
+ :tag("subscription", {
+ node = node,
+ jid = jid,
+ subscription = "subscribed"
+ });
+ else
+ reply = pubsub_error_reply(stanza, ret);
+ end
+ return origin.send(reply);
+end
+
+function handlers.set_unsubscribe(origin, stanza, unsubscribe)
+ local node, jid = unsubscribe.attr.node, unsubscribe.attr.jid;
+ if jid_bare(jid) ~= jid_bare(stanza.attr.from) then
+ return origin.send(pubsub_error_reply(stanza, "invalid-jid"));
+ end
+ local ok, ret = service:remove_subscription(node, stanza.attr.from, jid);
+ local reply;
+ if ok then
+ reply = st.reply(stanza);
+ else
+ reply = pubsub_error_reply(stanza, ret);
+ end
+ return origin.send(reply);
+end
+
+function handlers.set_publish(origin, stanza, publish)
+ local node = publish.attr.node;
+ local item = publish:get_child("item");
+ local id = (item and item.attr.id) or uuid_generate();
+ local ok, ret = service:publish(node, stanza.attr.from, id, item);
+ local reply;
+ if ok then
+ reply = st.reply(stanza)
+ :tag("pubsub", { xmlns = xmlns_pubsub })
+ :tag("publish", { node = node })
+ :tag("item", { id = id });
+ else
+ reply = pubsub_error_reply(stanza, ret);
+ end
+ return origin.send(reply);
+end
+
+function handlers.set_retract(origin, stanza, retract)
+ local node, notify = retract.attr.node, retract.attr.notify;
+ notify = (notify == "1") or (notify == "true");
+ local item = retract:get_child("item");
+ local id = item and item.attr.id
+ local reply, notifier;
+ if notify then
+ notifier = st.stanza("retract", { id = id });
+ end
+ local ok, ret = service:retract(node, stanza.attr.from, id, notifier);
+ if ok then
+ reply = st.reply(stanza);
+ else
+ reply = pubsub_error_reply(stanza, ret);
+ end
+ return origin.send(reply);
+end
+
+function simple_broadcast(node, jids, item)
+ item = st.clone(item);
+ item.attr.xmlns = nil; -- Clear the pubsub namespace
+ local message = st.message({ from = module.host, type = "headline" })
+ :tag("event", { xmlns = xmlns_pubsub_event })
+ :tag("items", { node = node })
+ :add_child(item);
+ for jid in pairs(jids) do
+ module:log("debug", "Sending notification to %s", jid);
+ message.attr.to = jid;
+ core_post_stanza(hosts[module.host], message);
+ end
+end
+
+module:hook("iq/host/http://jabber.org/protocol/pubsub:pubsub", handle_pubsub_iq);
+
+local disco_info;
+
+local feature_map = {
+ create = { "create-nodes", autocreate_on_publish and "instant-nodes", "item-ids" };
+ retract = { "delete-items", "retract-items" };
+ publish = { "publish" };
+ get_items = { "retrieve-items" };
+};
+
+local function add_disco_features_from_service(disco, service)
+ for method, features in pairs(feature_map) do
+ if service[method] then
+ for _, feature in ipairs(features) do
+ if feature then
+ disco:tag("feature", { var = xmlns_pubsub.."#"..feature }):up();
+ end
+ end
+ end
+ end
+ for affiliation in pairs(service.config.capabilities) do
+ if affiliation ~= "none" and affiliation ~= "owner" then
+ disco:tag("feature", { var = xmlns_pubsub.."#"..affiliation.."-affiliation" }):up();
+ end
+ end
+end
+
+local function build_disco_info(service)
+ local disco_info = st.stanza("query", { xmlns = "http://jabber.org/protocol/disco#info" })
+ :tag("identity", { category = "pubsub", type = "service" }):up()
+ :tag("feature", { var = "http://jabber.org/protocol/pubsub" }):up();
+ add_disco_features_from_service(disco_info, service);
+ return disco_info;
+end
+
+module:hook("iq-get/host/http://jabber.org/protocol/disco#info:query", function (event)
+ event.origin.send(st.reply(event.stanza):add_child(disco_info));
+ return true;
+end);
+
+module:hook("iq-get/host/http://jabber.org/protocol/disco#items:query", function (event)
+ local ok, ret = service:get_nodes(event.stanza.attr.from);
+ if not ok then
+ event.origin.send(pubsub_error_reply(stanza, ret));
+ else
+ local reply = st.reply(event.stanza)
+ :tag("query", { xmlns = "http://jabber.org/protocol/disco#items" });
+ for node, node_obj in pairs(ret) do
+ reply:tag("item", { jid = module.host, node = node, name = node_obj.config.name }):up();
+ end
+ event.origin.send(reply);
+ end
+ return true;
+end);
+
+local admin_aff = module:get_option_string("default_admin_affiliation", "owner");
+local function get_affiliation(jid)
+ local bare_jid = jid_bare(jid);
+ if bare_jid == module.host or usermanager.is_admin(bare_jid, module.host) then
+ return admin_aff;
+ end
+end
+
+function set_service(new_service)
+ service = new_service;
+ module.environment.service = service;
+ disco_info = build_disco_info(service);
+end
+
+function module.save()
+ return { service = service };
+end
+
+function module.restore(data)
+ set_service(data.service);
+end
+
+set_service(pubsub.new({
+ capabilities = {
+ none = {
+ create = false;
+ publish = false;
+ retract = false;
+ get_nodes = true;
+
+ subscribe = true;
+ unsubscribe = true;
+ get_subscription = true;
+ get_items = true;
+
+ subscribe_other = false;
+ unsubscribe_other = false;
+ get_subscription_other = false;
+
+ be_subscribed = true;
+ be_unsubscribed = true;
+
+ set_affiliation = false;
+ };
+ owner = {
+ create = true;
+ publish = true;
+ retract = true;
+ get_nodes = true;
+
+ subscribe = true;
+ unsubscribe = true;
+ get_subscription = true;
+ get_items = true;
+
+
+ subscribe_other = true;
+ unsubscribe_other = true;
+ get_subscription_other = true;
+
+ be_subscribed = true;
+ be_unsubscribed = true;
+
+ set_affiliation = true;
+ };
+ };
+
+ autocreate_on_publish = autocreate_on_publish;
+ autocreate_on_subscribe = autocreate_on_subscribe;
+
+ broadcaster = simple_broadcast;
+ get_affiliation = get_affiliation;
+ jids_equal = function (jid1, jid2)
+ return jid_bare(jid1) == jid_bare(jid2);
+ end;
+}));
diff --git a/plugins/mod_saslauth.lua b/plugins/mod_saslauth.lua
index c6ead31a..7f9a27ad 100644
--- a/plugins/mod_saslauth.lua
+++ b/plugins/mod_saslauth.lua
@@ -11,8 +11,11 @@
local st = require "util.stanza";
local sm_bind_resource = require "core.sessionmanager".bind_resource;
local sm_make_authenticated = require "core.sessionmanager".make_authenticated;
+local s2s_make_authenticated = require "core.s2smanager".make_authenticated;
local base64 = require "util.encodings".base64;
+local cert_verify_identity = require "util.x509".verify_identity;
+
local nodeprep = require "util.encodings".stringprep.nodeprep;
local usermanager_get_sasl_handler = require "core.usermanager".get_sasl_handler;
local t_concat, t_insert = table.concat, table.insert;
@@ -91,8 +94,123 @@ local function sasl_process_cdata(session, stanza)
return true;
end
+module:hook_stanza(xmlns_sasl, "success", function (session, stanza)
+ if session.type ~= "s2sout_unauthed" or session.external_auth ~= "attempting" then return; end
+ module:log("debug", "SASL EXTERNAL with %s succeeded", session.to_host);
+ session.external_auth = "succeeded"
+ session:reset_stream();
+
+ local default_stream_attr = {xmlns = "jabber:server", ["xmlns:stream"] = "http://etherx.jabber.org/streams",
+ ["xmlns:db"] = 'jabber:server:dialback', version = "1.0", to = session.to_host, from = session.from_host};
+ session.sends2s("<?xml version='1.0'?>");
+ session.sends2s(st.stanza("stream:stream", default_stream_attr):top_tag());
+
+ s2s_make_authenticated(session, session.to_host);
+ return true;
+end)
+
+module:hook_stanza(xmlns_sasl, "failure", function (session, stanza)
+ if session.type ~= "s2sout_unauthed" or session.external_auth ~= "attempting" then return; end
+
+ module:log("info", "SASL EXTERNAL with %s failed", session.to_host)
+ -- TODO: Log the failure reason
+ session.external_auth = "failed"
+end, 500)
+
+module:hook_stanza(xmlns_sasl, "failure", function (session, stanza)
+ -- TODO: Dialback wasn't loaded. Do something useful.
+end, 90)
+
+module:hook_stanza("http://etherx.jabber.org/streams", "features", function (session, stanza)
+ if session.type ~= "s2sout_unauthed" or not session.secure then return; end
+
+ local mechanisms = stanza:get_child("mechanisms", xmlns_sasl)
+ if mechanisms then
+ for mech in mechanisms:childtags() do
+ if mech[1] == "EXTERNAL" then
+ module:log("debug", "Initiating SASL EXTERNAL with %s", session.to_host);
+ local reply = st.stanza("auth", {xmlns = xmlns_sasl, mechanism = "EXTERNAL"});
+ reply:text(base64.encode(session.from_host))
+ session.sends2s(reply)
+ session.external_auth = "attempting"
+ return true
+ end
+ end
+ end
+end, 150);
+
+local function s2s_external_auth(session, stanza)
+ local mechanism = stanza.attr.mechanism;
+
+ if not session.secure then
+ if mechanism == "EXTERNAL" then
+ session.sends2s(build_reply("failure", "encryption-required"))
+ else
+ session.sends2s(build_reply("failure", "invalid-mechanism"))
+ end
+ return true;
+ end
+
+ if mechanism ~= "EXTERNAL" or session.cert_chain_status ~= "valid" then
+ session.sends2s(build_reply("failure", "invalid-mechanism"))
+ return true;
+ end
+
+ local text = stanza[1]
+ if not text then
+ session.sends2s(build_reply("failure", "malformed-request"))
+ return true
+ end
+
+ -- Either the value is "=" and we've already verified the external
+ -- cert identity, or the value is a string and either matches the
+ -- from_host (
+
+ text = base64.decode(text)
+ if not text then
+ session.sends2s(build_reply("failure", "incorrect-encoding"))
+ return true;
+ end
+
+ if session.cert_identity_status == "valid" then
+ if text ~= "" and text ~= session.from_host then
+ session.sends2s(build_reply("failure", "invalid-authzid"))
+ return true
+ end
+ else
+ if text == "" then
+ session.sends2s(build_reply("failure", "invalid-authzid"))
+ return true
+ end
+
+ local cert = session.conn:socket():getpeercertificate()
+ if (cert_verify_identity(text, "xmpp-server", cert)) then
+ session.cert_identity_status = "valid"
+ else
+ session.cert_identity_status = "invalid"
+ session.sends2s(build_reply("failure", "invalid-authzid"))
+ return true
+ end
+ end
+
+ session.external_auth = "succeeded"
+
+ if not session.from_host then
+ session.from_host = text;
+ end
+ session.sends2s(build_reply("success"))
+ module:log("info", "Accepting SASL EXTERNAL identity from %s", text or session.from_host);
+ s2s_make_authenticated(session, text or session.from_host)
+ session:reset_stream();
+ return true
+end
+
module:hook("stanza/urn:ietf:params:xml:ns:xmpp-sasl:auth", function(event)
local session, stanza = event.origin, event.stanza;
+ if session.type == "s2sin_unauthed" then
+ return s2s_external_auth(session, stanza)
+ end
+
if session.type ~= "c2s_unauthed" then return; end
if session.sasl_handler and session.sasl_handler.selected then
@@ -168,6 +286,20 @@ module:hook("stream-features", function(event)
end
end);
+module:hook("s2s-stream-features", function(event)
+ local origin, features = event.origin, event.features;
+ if origin.secure and origin.type == "s2sin_unauthed" then
+ -- Offer EXTERNAL if chain is valid and either we didn't validate
+ -- the identity or it passed.
+ if origin.cert_chain_status == "valid" and origin.cert_identity_status ~= "invalid" then --TODO: Configurable
+ module:log("debug", "Offering SASL EXTERNAL")
+ features:tag("mechanisms", { xmlns = xmlns_sasl })
+ :tag("mechanism"):text("EXTERNAL")
+ :up():up();
+ end
+ end
+end);
+
module:hook("iq/self/urn:ietf:params:xml:ns:xmpp-bind:bind", function(event)
local origin, stanza = event.origin, event.stanza;
local resource;
diff --git a/util/pubsub.lua b/util/pubsub.lua
new file mode 100644
index 00000000..1363bcb5
--- /dev/null
+++ b/util/pubsub.lua
@@ -0,0 +1,245 @@
+module("pubsub", package.seeall);
+
+local service = {};
+local service_mt = { __index = service };
+
+local default_config = {
+ broadcaster = function () end;
+ get_affiliation = function () end;
+ capabilities = {};
+};
+
+function new(config)
+ config = config or {};
+ return setmetatable({
+ config = setmetatable(config, { __index = default_config });
+ affiliations = {};
+ nodes = {};
+ }, service_mt);
+end
+
+function service:may(node, actor, action)
+ if actor == true then return true; end
+
+
+ local node_obj = self.nodes[node];
+ local node_aff = node_obj and node_obj.affiliations[actor];
+ local service_aff = self.affiliations[actor]
+ or self.config.get_affiliation(actor, node, action)
+ or "none";
+
+ local node_capabilities = node_obj and node_obj.capabilities;
+ local service_capabilities = self.config.capabilities;
+
+ -- Check if node allows/forbids it
+ if node_capabilities then
+ local caps = node_capabilities[node_aff or service_aff];
+ if caps then
+ local can = caps[action];
+ if can ~= nil then
+ return can;
+ end
+ end
+ end
+ -- Check service-wide capabilities instead
+ local caps = service_capabilities[node_aff or service_aff];
+ if caps then
+ local can = caps[action];
+ if can ~= nil then
+ return can;
+ end
+ end
+
+ return false;
+end
+
+function service:set_affiliation(node, actor, jid, affiliation)
+ -- Access checking
+ if not self:may(node, actor, "set_affiliation") then
+ return false, "forbidden";
+ end
+ --
+ local node_obj = self.nodes[node];
+ if not node_obj then
+ return false, "item-not-found";
+ end
+ node_obj.affiliations[jid] = affiliation;
+ local _, jid_sub = self:get_subscription(node, nil, jid);
+ if not jid_sub and not self:may(node, jid, "be_unsubscribed") then
+ local ok, err = self:add_subscription(node, nil, jid);
+ if not ok then
+ return ok, err;
+ end
+ elseif jid_sub and not self:may(node, jid, "be_subscribed") then
+ local ok, err = self:add_subscription(node, nil, jid);
+ if not ok then
+ return ok, err;
+ end
+ end
+ return true;
+end
+
+function service:add_subscription(node, actor, jid, options)
+ -- Access checking
+ local cap;
+ if jid == actor or self.config.jids_equal(actor, jid) then
+ cap = "subscribe";
+ else
+ cap = "subscribe_other";
+ end
+ if not self:may(node, actor, cap) then
+ return false, "forbidden";
+ end
+ if not self:may(node, jid, "be_subscribed") then
+ return false, "forbidden";
+ end
+ --
+ local node_obj = self.nodes[node];
+ if not node_obj then
+ if not self.config.autocreate_on_subscribe then
+ return false, "item-not-found";
+ else
+ local ok, err = self:create(node, actor);
+ if not ok then
+ return ok, err;
+ end
+ end
+ end
+ node_obj.subscribers[jid] = options or true;
+ return true;
+end
+
+function service:remove_subscription(node, actor, jid)
+ -- Access checking
+ local cap;
+ if jid == actor or self.config.jids_equal(actor, jid) then
+ cap = "unsubscribe";
+ else
+ cap = "unsubscribe_other";
+ end
+ if not self:may(node, actor, cap) then
+ return false, "forbidden";
+ end
+ if not self:may(node, jid, "be_unsubscribed") then
+ return false, "forbidden";
+ end
+ --
+ local node_obj = self.nodes[node];
+ if not node_obj then
+ return false, "item-not-found";
+ end
+ if not node_obj.subscribers[jid] then
+ return false, "not-subscribed";
+ end
+ node_obj.subscribers[jid] = nil;
+ return true;
+end
+
+function service:get_subscription(node, actor, jid)
+ -- Access checking
+ local cap;
+ if jid == actor or self.config.jids_equal(actor, jid) then
+ cap = "get_subscription";
+ else
+ cap = "get_subscription_other";
+ end
+ if not self:may(node, actor, cap) then
+ return false, "forbidden";
+ end
+ --
+ local node_obj = self.nodes[node];
+ if node_obj then
+ return true, node_obj.subscribers[jid];
+ end
+end
+
+function service:create(node, actor)
+ -- Access checking
+ if not self:may(node, actor, "create") then
+ return false, "forbidden";
+ end
+ --
+ if self.nodes[node] then
+ return false, "conflict";
+ end
+
+ self.nodes[node] = {
+ name = node;
+ subscribers = {};
+ config = {};
+ data = {};
+ affiliations = {};
+ };
+ local ok, err = self:set_affiliation(node, true, actor, "owner");
+ if not ok then
+ self.nodes[node] = nil;
+ end
+ return ok, err;
+end
+
+function service:publish(node, actor, id, item)
+ -- Access checking
+ if not self:may(node, actor, "publish") then
+ return false, "forbidden";
+ end
+ --
+ local node_obj = self.nodes[node];
+ if not node_obj then
+ if not self.config.autocreate_on_publish then
+ return false, "item-not-found";
+ end
+ local ok, err = self:create(node, actor);
+ if not ok then
+ return ok, err;
+ end
+ node_obj = self.nodes[node];
+ end
+ node_obj.data[id] = item;
+ self.config.broadcaster(node, node_obj.subscribers, item);
+ return true;
+end
+
+function service:retract(node, actor, id, retract)
+ -- Access checking
+ if not self:may(node, actor, "retract") then
+ return false, "forbidden";
+ end
+ --
+ local node_obj = self.nodes[node];
+ if (not node_obj) or (not node_obj.data[id]) then
+ return false, "item-not-found";
+ end
+ node_obj.data[id] = nil;
+ if retract then
+ self.config.broadcaster(node, node_obj.subscribers, retract);
+ end
+ return true
+end
+
+function service:get_items(node, actor, id)
+ -- Access checking
+ if not self:may(node, actor, "get_items") then
+ return false, "forbidden";
+ end
+ --
+ local node_obj = self.nodes[node];
+ if not node_obj then
+ return false, "item-not-found";
+ end
+ if id then -- Restrict results to a single specific item
+ return true, { node_obj.data[id] };
+ else
+ return true, node_obj.data;
+ end
+end
+
+function service:get_nodes(actor)
+ -- Access checking
+ if not self:may(nil, actor, "get_nodes") then
+ return false, "forbidden";
+ end
+ --
+ return true, self.nodes;
+end
+
+return _M;
diff --git a/util/x509.lua b/util/x509.lua
new file mode 100644
index 00000000..11f231a0
--- /dev/null
+++ b/util/x509.lua
@@ -0,0 +1,211 @@
+-- Prosody IM
+-- Copyright (C) 2010 Matthew Wild
+-- Copyright (C) 2010 Paul Aurich
+--
+-- This project is MIT/X11 licensed. Please see the
+-- COPYING file in the source package for more information.
+--
+
+-- TODO: I feel a fair amount of this logic should be integrated into Luasec,
+-- so that everyone isn't re-inventing the wheel. Dependencies on
+-- IDN libraries complicate that.
+
+
+-- [TLS-CERTS] - http://tools.ietf.org/html/draft-saintandre-tls-server-id-check-10
+-- [XMPP-CORE] - http://tools.ietf.org/html/draft-ietf-xmpp-3920bis-18
+-- [SRV-ID] - http://tools.ietf.org/html/rfc4985
+-- [IDNA] - http://tools.ietf.org/html/rfc5890
+-- [LDAP] - http://tools.ietf.org/html/rfc4519
+-- [PKIX] - http://tools.ietf.org/html/rfc5280
+
+local nameprep = require "util.encodings".stringprep.nameprep;
+local idna_to_ascii = require "util.encodings".idna.to_ascii;
+local log = require "util.logger".init("x509");
+
+module "x509"
+
+local oid_commonname = "2.5.4.3"; -- [LDAP] 2.3
+local oid_subjectaltname = "2.5.29.17"; -- [PKIX] 4.2.1.6
+local oid_xmppaddr = "1.3.6.1.5.5.7.8.5"; -- [XMPP-CORE]
+local oid_dnssrv = "1.3.6.1.5.5.7.8.7"; -- [SRV-ID]
+
+-- Compare a hostname (possibly international) with asserted names
+-- extracted from a certificate.
+-- This function follows the rules laid out in
+-- sections 4.4.1 and 4.4.2 of [TLS-CERTS]
+--
+-- A wildcard ("*") all by itself is allowed only as the left-most label
+local function compare_dnsname(host, asserted_names)
+ -- TODO: Sufficient normalization? Review relevant specs.
+ local norm_host = idna_to_ascii(host)
+ if norm_host == nil then
+ log("info", "Host %s failed IDNA ToASCII operation", host)
+ return false
+ end
+
+ norm_host = norm_host:lower()
+
+ local host_chopped = norm_host:gsub("^[^.]+%.", "") -- everything after the first label
+
+ for i=1,#asserted_names do
+ local name = asserted_names[i]
+ if norm_host == name:lower() then
+ log("debug", "Cert dNSName %s matched hostname", name);
+ return true
+ end
+
+ -- Allow the left most label to be a "*"
+ if name:match("^%*%.") then
+ local rest_name = name:gsub("^[^.]+%.", "")
+ if host_chopped == rest_name:lower() then
+ log("debug", "Cert dNSName %s matched hostname", name);
+ return true
+ end
+ end
+ end
+
+ return false
+end
+
+-- Compare an XMPP domain name with the asserted id-on-xmppAddr
+-- identities extracted from a certificate. Both are UTF8 strings.
+--
+-- Per [XMPP-CORE], matches against asserted identities don't include
+-- wildcards, so we just do a normalize on both and then a string comparison
+--
+-- TODO: Support for full JIDs?
+local function compare_xmppaddr(host, asserted_names)
+ local norm_host = nameprep(host)
+
+ for i=1,#asserted_names do
+ local name = asserted_names[i]
+
+ -- We only want to match against bare domains right now, not
+ -- those crazy full-er JIDs.
+ if name:match("[@/]") then
+ log("debug", "Ignoring xmppAddr %s because it's not a bare domain", name)
+ else
+ local norm_name = nameprep(name)
+ if norm_name == nil then
+ log("info", "Ignoring xmppAddr %s, failed nameprep!", name)
+ else
+ if norm_host == norm_name then
+ log("debug", "Cert xmppAddr %s matched hostname", name)
+ return true
+ end
+ end
+ end
+ end
+
+ return false
+end
+
+-- Compare a host + service against the asserted id-on-dnsSRV (SRV-ID)
+-- identities extracted from a certificate.
+--
+-- Per [SRV-ID], the asserted identities will be encoded in ASCII via ToASCII.
+-- Comparison is done case-insensitively, and a wildcard ("*") all by itself
+-- is allowed only as the left-most non-service label.
+local function compare_srvname(host, service, asserted_names)
+ local norm_host = idna_to_ascii(host)
+ if norm_host == nil then
+ log("info", "Host %s failed IDNA ToASCII operation", host);
+ return false
+ end
+
+ -- Service names start with a "_"
+ if service:match("^_") == nil then service = "_"..service end
+
+ norm_host = norm_host:lower();
+ local host_chopped = norm_host:gsub("^[^.]+%.", "") -- everything after the first label
+
+ for i=1,#asserted_names do
+ local asserted_service, name = asserted_names[i]:match("^(_[^.]+)%.(.*)");
+ if service == asserted_service then
+ if norm_host == name:lower() then
+ log("debug", "Cert SRVName %s matched hostname", name);
+ return true;
+ end
+
+ -- Allow the left most label to be a "*"
+ if name:match("^%*%.") then
+ local rest_name = name:gsub("^[^.]+%.", "")
+ if host_chopped == rest_name:lower() then
+ log("debug", "Cert SRVName %s matched hostname", name)
+ return true
+ end
+ end
+ if norm_host == name:lower() then
+ log("debug", "Cert SRVName %s matched hostname", name);
+ return true
+ end
+ end
+ end
+
+ return false
+end
+
+function verify_identity(host, service, cert)
+ local ext = cert:extensions()
+ if ext[oid_subjectaltname] then
+ local sans = ext[oid_subjectaltname];
+
+ -- Per [TLS-CERTS] 4.3, 4.4.4, "a client MUST NOT seek a match for a
+ -- reference identifier if the presented identifiers include a DNS-ID
+ -- SRV-ID, URI-ID, or any application-specific identifier types"
+ local had_supported_altnames = false
+
+ if sans[oid_xmppaddr] then
+ had_supported_altnames = true
+ if compare_xmppaddr(host, sans[oid_xmppaddr]) then return true end
+ end
+
+ if sans[oid_dnssrv] then
+ had_supported_altnames = true
+ -- Only check srvNames if the caller specified a service
+ if service and compare_srvname(host, service, sans[oid_dnssrv]) then return true end
+ end
+
+ if sans["dNSName"] then
+ had_supported_altnames = true
+ if compare_dnsname(host, sans["dNSName"]) then return true end
+ end
+
+ -- We don't need URIs, but [TLS-CERTS] is clear.
+ if sans["uniformResourceIdentifier"] then
+ had_supported_altnames = true
+ end
+
+ if had_supported_altnames then return false end
+ end
+
+ -- Extract a common name from the certificate, and check it as if it were
+ -- a dNSName subjectAltName (wildcards may apply for, and receive,
+ -- cat treats)
+ --
+ -- Per [TLS-CERTS] 1.5, a CN-ID is the Common Name from a cert subject
+ -- which has one and only one Common Name
+ local subject = cert:subject()
+ local cn = nil
+ for i=1,#subject do
+ local dn = subject[i]
+ if dn["oid"] == oid_commonname then
+ if cn then
+ log("info", "Certificate has multiple common names")
+ return false
+ end
+
+ cn = dn["value"];
+ end
+ end
+
+ if cn then
+ -- Per [TLS-CERTS] 4.4.4, follow the comparison rules for dNSName SANs.
+ return compare_dnsname(host, { cn })
+ end
+
+ -- If all else fails, well, why should we be any different?
+ return false
+end
+
+return _M;
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-16 09:47:57 +0000