X-Git-Url: https://git.enpas.org/?a=blobdiff_plain;f=plugins%2Fmod_saslauth.lua;h=d595fd247eaf8ea8a24ea7913f98ef83fc93dc3b;hb=0869028823361850d8a6d76a025017c5129ef6dc;hp=3018b825a650a6c1539db06d1964f69d75bc0aac;hpb=1bd0902fe7d3457fd96e55f5ed04c46f81fe6968;p=prosody.git diff --git a/plugins/mod_saslauth.lua b/plugins/mod_saslauth.lua index 3018b825..d595fd24 100644 --- a/plugins/mod_saslauth.lua +++ b/plugins/mod_saslauth.lua @@ -1,7 +1,7 @@ --- Prosody IM v0.4 +-- Prosody IM -- Copyright (C) 2008-2009 Matthew Wild -- Copyright (C) 2008-2009 Waqas Hussain --- +-- -- This project is MIT/X11 licensed. Please see the -- COPYING file in the source package for more information. -- @@ -10,16 +10,24 @@ local st = require "util.stanza"; local sm_bind_resource = require "core.sessionmanager".bind_resource; +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_user_exists = require "core.usermanager".user_exists; +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 md5 = require "util.hashes".md5; local config = require "core.configmanager"; -local log = require "util.logger".init("mod_saslauth"); +local secure_auth_only = config.get(module:get_host(), "core", "c2s_require_encryption") or config.get(module:get_host(), "core", "require_encryption"); + +local log = module._log; local xmlns_sasl ='urn:ietf:params:xml:ns:xmpp-sasl'; local xmlns_bind ='urn:ietf:params:xml:ns:xmpp-bind'; @@ -27,19 +35,40 @@ local xmlns_stanzas ='urn:ietf:params:xml:ns:xmpp-stanzas'; local new_sasl = require "util.sasl".new; +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 +}; + +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", ret or ""); + log("debug", "%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", ret or ""); + log("debug", "%s", ret or ""); reply:text(base64.encode(ret or "")); else - error("Unknown sasl status: "..status); + module:log("error", "Unknown sasl status: %s", status); end return reply; end @@ -48,37 +77,31 @@ local function handle_status(session, status) if status == "failure" then session.sasl_handler = nil; elseif status == "success" then - if not session.sasl_handler.username then error("SASL succeeded but we didn't get a username!"); end -- TODO move this to sessionmanager - sessionmanager.make_authenticated(session, session.sasl_handler.username); + 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(); + return; + end + sm_make_authenticated(session, session.sasl_handler.username); session.sasl_handler = nil; session:reset_stream(); end end -local function password_callback(node, host, mechanism, decoder) - local password = (datamanager.load(node, host, "accounts") or {}).password; -- FIXME handle hashed passwords - local func = function(x) return x; end; - if password then - if mechanism == "PLAIN" then - return func, password; - elseif mechanism == "DIGEST-MD5" then - if decoder then node, host, password = decoder(node), decoder(host), decoder(password); end - return func, md5(node..":"..host..":"..password); - end - end - return func, nil; -end - local function sasl_handler(session, stanza) if stanza.name == "auth" then -- FIXME ignoring duplicates because ejabberd does - if config.get(session.host or "*", "core", "anonymous_login") and stanza.attr.mechanism ~= "ANONYMOUS" then - return session.send(build_reply("failure", "invalid-mechanism")); - elseif mechanism == "ANONYMOUS" then + if config.get(session.host or "*", "core", "anonymous_login") then + if stanza.attr.mechanism ~= "ANONYMOUS" then + return session.send(build_reply("failure", "invalid-mechanism")); + end + 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, password_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 elseif not session.sasl_handler then @@ -87,17 +110,17 @@ local function sasl_handler(session, stanza) local text = stanza[1]; if text then text = base64.decode(text); - log("debug", text); + log("debug", "%s", text); 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: "..tostring(s)); + local s = build_reply(status, ret, err_msg); + log("debug", "sasl reply: %s", tostring(s)); session.send(s); end @@ -108,27 +131,34 @@ module:add_handler("c2s_unauthed", "response", xmlns_sasl, sasl_handler); 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) +module:add_event_hook("stream-features", + function (session, features) if not session.username then - 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 - features:tag("mechanism"):text("DIGEST-MD5"):up(); - features:tag("mechanism"):text("PLAIN"):up(); + if secure_auth_only and not session.secure then + return; + end + if config.get(session.host or "*", "core", "anonymous_login") then + session.sasl_handler = new_sasl(session.host, anonymous_authentication_profile); + else + session.sasl_handler = new_sasl(session.host, default_authentication_profile); + if not session.secure then + session.sasl_handler:forbidden({"PLAIN"}); end + end + features:tag("mechanisms", mechanisms_attr); + for k, v in pairs(session.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):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", + +module:add_iq_handler("c2s", "urn:ietf:params:xml:ns:xmpp-bind", function (session, stanza) - log("debug", "Client tried to bind to a resource"); + log("debug", "Client requesting a resource bind"); local resource; if stanza.attr.type == "set" then local bind = stanza.tags[1]; @@ -148,9 +178,9 @@ module:add_iq_handler("c2s", "urn:ietf:params:xml:ns:xmpp-bind", :tag("jid"):text(session.full_jid)); end end); - -module:add_iq_handler("c2s", "urn:ietf:params:xml:ns:xmpp-session", + +module:add_iq_handler("c2s", "urn:ietf:params:xml:ns:xmpp-session", function (session, stanza) - log("debug", "Client tried to bind to a resource"); + log("debug", "Client requesting a session"); session.send(st.reply(stanza)); end);