local sm_make_authenticated = require "core.sessionmanager".make_authenticated;
local base64 = require "util.encodings".base64;
+local nodeprep = require "util.encodings".stringprep.nodeprep;
local datamanager_load = require "util.datamanager".load;
local usermanager_validate_credentials = require "core.usermanager".validate_credentials;
local usermanager_get_supported_methods = require "core.usermanager".get_supported_methods;
local usermanager_get_password = require "core.usermanager".get_password;
local t_concat, t_insert = table.concat, table.insert;
local tostring = tostring;
-local jid_split = require "util.jid".split
+local jid_split = require "util.jid".split;
local md5 = require "util.hashes".md5;
local config = require "core.configmanager";
-local secure_auth_only = config.get(module:get_host(), "core", "require_encryption");
+local secure_auth_only = module:get_option("c2s_require_encryption") or module:get_option("require_encryption");
+local sasl_backend = module:get_option("sasl_backend") or "builtin";
local log = module._log;
local xmlns_bind ='urn:ietf:params:xml:ns:xmpp-bind';
local xmlns_stanzas ='urn:ietf:params:xml:ns:xmpp-stanzas';
-local new_sasl = require "util.sasl".new;
+local new_sasl;
+if sasl_backend == "cyrus" then
+ prosody.unlock_globals(); --FIXME: Figure out why this is needed and
+ -- why cyrussasl isn't caught by the sandbox
+ local ok, cyrus = pcall(require, "util.sasl_cyrus");
+ prosody.lock_globals();
+ if ok then
+ local cyrus_new = cyrus.new;
+ new_sasl = function(realm)
+ return cyrus_new(realm, module:get_option("cyrus_service_name") or "xmpp");
+ end
+ else
+ sasl_backend = "builtin";
+ module:log("warn", "Failed to load Cyrus SASL, falling back to builtin auth mechanisms");
+ module:log("debug", "Failed to load Cyrus because: %s", cyrus);
+ end
+end
+if not new_sasl then
+ if sasl_backend ~= "builtin" then module:log("warn", "Unknown SASL backend %s", sasl_backend); end;
+ new_sasl = require "util.sasl".new;
+end
+
+local default_authentication_profile = {
+ plain = function(username, realm)
+ local prepped_username = nodeprep(username);
+ if not prepped_username then
+ log("debug", "NODEprep failed on username: %s", username);
+ return "", nil;
+ end
+ local password = usermanager_get_password(prepped_username, realm);
+ if not password then
+ return "", nil;
+ end
+ return password, true;
+ end
+};
+
+local anonymous_authentication_profile = {
+ anonymous = function(username, realm)
+ return true; -- for normal usage you should always return true here
+ end
+};
local function build_reply(status, ret, err_msg)
local reply = st.stanza(status, {xmlns = xmlns_sasl});
if status == "challenge" then
- log("debug", "%s", ret or "");
+ --log("debug", "CHALLENGE: %s", ret or "");
reply:text(base64.encode(ret or ""));
elseif status == "failure" then
reply:tag(ret):up();
if err_msg then reply:tag("text"):text(err_msg); end
elseif status == "success" then
- log("debug", "%s", ret or "");
+ --log("debug", "SUCCESS: %s", ret or "");
reply:text(base64.encode(ret or ""));
else
module:log("error", "Unknown sasl status: %s", status);
local function handle_status(session, status)
if status == "failure" then
- session.sasl_handler = nil;
+ session.sasl_handler = session.sasl_handler:clean_clone();
elseif status == "success" then
- if not session.sasl_handler.username then -- TODO move this to sessionmanager
+ local username = nodeprep(session.sasl_handler.username);
+ if not username then -- TODO move this to sessionmanager
module:log("warn", "SASL succeeded but we didn't get a username!");
session.sasl_handler = nil;
session:reset_stream();
end
end
-local function credentials_callback(mechanism, ...)
- if mechanism == "PLAIN" then
- local username, hostname, password = arg[1], arg[2], arg[3];
- local response = usermanager_validate_credentials(hostname, username, password, mechanism)
- if response == nil then return false
- else return response end
- elseif mechanism == "DIGEST-MD5" then
- function func(x) return x; end
- local node, domain, realm, decoder = arg[1], arg[2], arg[3], arg[4];
- local password = usermanager_get_password(node, domain)
- if decoder then node, realm, password = decoder(node), decoder(realm), decoder(password); end
- return func, md5(node..":"..realm..":"..password);
- end
-end
-
local function sasl_handler(session, stanza)
if stanza.name == "auth" then
-- FIXME ignoring duplicates because ejabberd does
elseif stanza.attr.mechanism == "ANONYMOUS" then
return session.send(build_reply("failure", "mechanism-too-weak"));
end
- session.sasl_handler = new_sasl(stanza.attr.mechanism, session.host, credentials_callback);
- if not session.sasl_handler then
+ local valid_mechanism = session.sasl_handler:select(stanza.attr.mechanism);
+ if not valid_mechanism then
return session.send(build_reply("failure", "invalid-mechanism"));
end
+ if secure_auth_only and not session.secure then
+ return session.send(build_reply("failure", "encryption-required"));
+ end
elseif not session.sasl_handler then
return; -- FIXME ignoring out of order stanzas because ejabberd does
end
local text = stanza[1];
if text then
text = base64.decode(text);
- log("debug", "%s", text);
+ --log("debug", "AUTH: %s", text:gsub("[%z\001-\008\011\012\014-\031]", " "));
if not text then
session.sasl_handler = nil;
session.send(build_reply("failure", "incorrect-encoding"));
return;
end
end
- local status, ret, err_msg = session.sasl_handler:feed(text);
+ local status, ret, err_msg = session.sasl_handler:process(text);
handle_status(session, status);
local s = build_reply(status, ret, err_msg);
log("debug", "sasl reply: %s", tostring(s));
local mechanisms_attr = { xmlns='urn:ietf:params:xml:ns:xmpp-sasl' };
local bind_attr = { xmlns='urn:ietf:params:xml:ns:xmpp-bind' };
local xmpp_session_attr = { xmlns='urn:ietf:params:xml:ns:xmpp-session' };
-module:add_event_hook("stream-features",
- function (session, features)
- if not session.username then
- if secure_auth_only and not session.secure then
- return;
- end
- features:tag("mechanisms", mechanisms_attr);
- -- TODO: Provide PLAIN only if TLS is active, this is a SHOULD from the introduction of RFC 4616. This behavior could be overridden via configuration but will issuing a warning or so.
- if config.get(session.host or "*", "core", "anonymous_login") then
- features:tag("mechanism"):text("ANONYMOUS"):up();
- else
- mechanisms = usermanager_get_supported_methods(session.host or "*");
- for k, v in pairs(mechanisms) do
- features:tag("mechanism"):text(k):up();
- end
- end
- features:up();
- else
- features:tag("bind", bind_attr):tag("required"):up():up();
- features:tag("session", xmpp_session_attr):up();
- end
- end);
-
-module:add_iq_handler("c2s", "urn:ietf:params:xml:ns:xmpp-bind",
- function (session, stanza)
- log("debug", "Client requesting a resource bind");
- local resource;
- if stanza.attr.type == "set" then
- local bind = stanza.tags[1];
- if bind and bind.attr.xmlns == xmlns_bind then
- resource = bind:child_with_name("resource");
- if resource then
- resource = resource[1];
- end
- end
+module:hook("stream-features", function(event)
+ local origin, features = event.origin, event.features;
+ if not origin.username then
+ if secure_auth_only and not origin.secure then
+ return;
+ end
+ if module:get_option("anonymous_login") then
+ origin.sasl_handler = new_sasl(origin.host, anonymous_authentication_profile);
+ else
+ origin.sasl_handler = new_sasl(origin.host, default_authentication_profile);
+ if not (module:get_option("allow_unencrypted_plain_auth")) and not origin.secure then
+ origin.sasl_handler:forbidden({"PLAIN"});
end
- local success, err_type, err, err_msg = sm_bind_resource(session, resource);
- if not success then
- session.send(st.error_reply(stanza, err_type, err, err_msg));
- else
- session.send(st.reply(stanza)
- :tag("bind", { xmlns = xmlns_bind})
- :tag("jid"):text(session.full_jid));
+ end
+ features:tag("mechanisms", mechanisms_attr);
+ for k, v in pairs(origin.sasl_handler:mechanisms()) do
+ features:tag("mechanism"):text(v):up();
+ end
+ features:up();
+ else
+ features:tag("bind", bind_attr):tag("required"):up():up();
+ features:tag("session", xmpp_session_attr):tag("optional"):up():up();
+ end
+end);
+
+module:add_iq_handler("c2s", "urn:ietf:params:xml:ns:xmpp-bind", function(session, stanza)
+ log("debug", "Client requesting a resource bind");
+ local resource;
+ if stanza.attr.type == "set" then
+ local bind = stanza.tags[1];
+ if bind and bind.attr.xmlns == xmlns_bind then
+ resource = bind:child_with_name("resource");
+ if resource then
+ resource = resource[1];
end
- end);
+ end
+ end
+ local success, err_type, err, err_msg = sm_bind_resource(session, resource);
+ if not success then
+ session.send(st.error_reply(stanza, err_type, err, err_msg));
+ else
+ session.send(st.reply(stanza)
+ :tag("bind", { xmlns = xmlns_bind})
+ :tag("jid"):text(session.full_jid));
+ end
+end);
-module:add_iq_handler("c2s", "urn:ietf:params:xml:ns:xmpp-session",
- function (session, stanza)
- log("debug", "Client requesting a session");
- session.send(st.reply(stanza));
- end);
+module:add_iq_handler("c2s", "urn:ietf:params:xml:ns:xmpp-session", function(session, stanza)
+ log("debug", "Client requesting a session");
+ session.send(st.reply(stanza));
+end);
projects / prosody.git / blobdiff