--- 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.
--
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 jid_split = require "util.jid".split;
local md5 = require "util.hashes".md5;
local config = require "core.configmanager";
+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_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
+
+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});
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();
return;
- end
+ 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"));
+ 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
+ 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"));
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);
+ local s = build_reply(status, ret, err_msg);
log("debug", "sasl reply: %s", tostring(s));
session.send(s);
end
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
- 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();
- 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: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);
-
-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);
+ 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);
projects / prosody.git / blobdiff