diff options
Diffstat (limited to 'plugins/mod_saslauth.lua')
| -rw-r--r-- | plugins/mod_saslauth.lua | 150 |
1 files changed, 80 insertions, 70 deletions
diff --git a/plugins/mod_saslauth.lua b/plugins/mod_saslauth.lua index 04e33b29..75ee9f04 100644 --- a/plugins/mod_saslauth.lua +++ b/plugins/mod_saslauth.lua @@ -21,11 +21,12 @@ 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 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", "c2s_require_encryption") or 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; @@ -33,28 +34,37 @@ local xmlns_sasl ='urn:ietf:params:xml:ns:xmpp-sasl'; 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 + local cyrus_new = require "util.sasl_cyrus".new; + new_sasl = function(realm) + return cyrus_new(realm, module:get_option("cyrus_service_name") or "xmpp"); + end +else + if sasl_backend ~= "builtin" then module:log("warn", "Unknown SASL backend %s", sasl_backend); end; + new_sasl = require "util.sasl".new; +end -default_authentication_profile = { +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; + 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 = { +local anonymous_authentication_profile = { anonymous = function(username, realm) - return true; -- for normal usage you should always return true here - end -} + 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}); @@ -75,7 +85,7 @@ end 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 local username = nodeprep(session.sasl_handler.username); if not username then -- TODO move this to sessionmanager @@ -104,13 +114,16 @@ local function sasl_handler(session, stanza) 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", "%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")); @@ -131,56 +144,53 @@ 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) - if not session.username then - if secure_auth_only and not session.secure then - return; - end - if module:get_option("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 (module:get_option("allow_unencrypted_plain_auth")) and 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):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 +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 + if module:get_option("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 (module:get_option("allow_unencrypted_plain_auth")) and not session.secure then + session.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(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):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); |