void jabber_auth_start_old(JabberStream *js)
{
PurpleAccount *account;
JabberIq *iq;
PurpleXmlNode *query, *username;
account = purple_connection_get_account(js->gc);
/*
* We can end up here without encryption if the server doesn't support
* <stream:features/> and we're not using old-style SSL. If the user
* is requiring SSL/TLS, we need to enforce it.
*/
if (!jabber_stream_is_ssl(js) &&
g_str_equal("require_tls",
purple_account_get_string(account, "connection_security", JABBER_DEFAULT_REQUIRE_TLS))) {
purple_connection_error(js->gc,
PURPLE_CONNECTION_ERROR_ENCRYPTION_ERROR,
_("You require encryption, but it is not available on this server."));
return;
}
if (js->registration) {
jabber_register_start(js);
return;
}
/*
* IQ Auth doesn't have support for resource binding, so we need to pick a
* default resource so it will work properly. jabberd14 throws an error and
* iChat server just fails silently.
*/
if (!js->user->resource || *js->user->resource == '\0') {
g_free(js->user->resource);
js->user->resource = g_strdup("Home");
}
#ifdef HAVE_CYRUS_SASL
/* If we have Cyrus SASL, then passwords will have been set
* to OPTIONAL for this protocol. So, we need to do our own
* password prompting here
*/
if (!purple_connection_get_password(js->gc)) {
purple_account_request_password(account, G_CALLBACK(auth_old_pass_cb), G_CALLBACK(auth_no_pass_cb), js->gc);
return;
}
#endif
iq = jabber_iq_new_query(js, JABBER_IQ_GET, "jabber:iq:auth");
query = purple_xmlnode_get_child(iq->node, "query");
username = purple_xmlnode_new_child(query, "username");
purple_xmlnode_insert_data(username, js->user->node, -1);
jabber_iq_set_callback(iq, auth_old_cb, NULL);
jabber_iq_send(iq);
}
static JabberSaslState
jabber_auth_start_cyrus(JabberStream *js, xmlnode **reply, char **error)
{
PurpleAccount *account;
const char *clientout = NULL;
char *enc_out;
unsigned coutlen = 0;
sasl_security_properties_t secprops;
gboolean again;
gboolean plaintext = TRUE;
/* Set up security properties and options */
secprops.min_ssf = 0;
secprops.security_flags = SASL_SEC_NOANONYMOUS;
account = purple_connection_get_account(js->gc);
if (!jabber_stream_is_ssl(js)) {
secprops.max_ssf = -1;
secprops.maxbufsize = 4096;
plaintext = purple_account_get_bool(account, "auth_plain_in_clear", FALSE);
if (!plaintext)
secprops.security_flags |= SASL_SEC_NOPLAINTEXT;
} else {
secprops.max_ssf = 0;
secprops.maxbufsize = 0;
plaintext = TRUE;
}
secprops.property_names = 0;
secprops.property_values = 0;
do {
again = FALSE;
js->sasl_state = sasl_client_new("xmpp", js->serverFQDN, NULL, NULL, js->sasl_cb, 0, &js->sasl);
if (js->sasl_state==SASL_OK) {
sasl_setprop(js->sasl, SASL_SEC_PROPS, &secprops);
purple_debug_info("sasl", "Mechs found: %s\n", js->sasl_mechs->str);
js->sasl_state = sasl_client_start(js->sasl, js->sasl_mechs->str, NULL, &clientout, &coutlen, &js->current_mech);
}
switch (js->sasl_state) {
/* Success */
case SASL_OK:
case SASL_CONTINUE:
break;
case SASL_NOMECH:
/* No mechanisms have offered to help */
/* Firstly, if we don't have a password try
* to get one
*/
if (!purple_account_get_password(account)) {
purple_account_request_password(account, G_CALLBACK(auth_pass_cb), G_CALLBACK(auth_no_pass_cb), js->gc);
return JABBER_SASL_STATE_CONTINUE;
/* If we've got a password, but aren't sending
* it in plaintext, see if we can turn on
* plaintext auth
*/
/* XXX Should we just check for PLAIN/LOGIN being offered mechanisms? */
} else if (!plaintext) {
char *msg = g_strdup_printf(_("%s may require plaintext authentication over an unencrypted connection. Allow this and continue authentication?"),
purple_account_get_username(account));
purple_request_yes_no(js->gc, _("Plaintext Authentication"),
_("Plaintext Authentication"),
msg,
1, account, NULL, NULL, account,
allow_cyrus_plaintext_auth,
disallow_plaintext_auth);
g_free(msg);
return JABBER_SASL_STATE_CONTINUE;
} else
js->auth_fail_count++;
if (js->auth_fail_count == 1 &&
(js->sasl_mechs->str && g_str_equal(js->sasl_mechs->str, "GSSAPI"))) {
/* If we tried GSSAPI first, it failed, and it was the only method we had to try, try jabber:iq:auth
* for compatibility with iChat 10.5 Server and other jabberd based servers.
*
* iChat Server 10.5 and certain other corporate servers offer SASL GSSAPI by default, which is often
* not configured on the client side, and expects a fallback to jabber:iq:auth when it (predictably) fails.
*
* Note: xep-0078 points out that using jabber:iq:auth after a sasl failure is wrong. However,
* I believe this refers to actual authentication failure, not a simple lack of concordant mechanisms.
* Doing otherwise means that simply compiling with SASL support renders the client unable to connect to servers
* which would connect without issue otherwise. -evands
*/
js->auth_mech = NULL;
jabber_auth_start_old(js);
return JABBER_SASL_STATE_CONTINUE;
}
break;
/* Fatal errors. Give up and go home */
case SASL_BADPARAM:
case SASL_NOMEM:
*error = g_strdup(_("SASL authentication failed"));
break;
/* For everything else, fail the mechanism and try again */
default:
purple_debug_info("sasl", "sasl_state is %d, failing the mech and trying again\n", js->sasl_state);
js->auth_fail_count++;
/*
* DAA: is this right?
* The manpage says that "mech" will contain the chosen mechanism on success.
* Presumably, if we get here that isn't the case and we shouldn't try again?
* I suspect that this never happens.
*/
/*
* SXW: Yes, this is right. What this handles is the situation where a
* mechanism, say GSSAPI, is tried. If that mechanism fails, it may be
* due to mechanism specific issues, so we want to try one of the other
* supported mechanisms. This code handles that case
*/
if (js->current_mech && *js->current_mech) {
char *pos;
if ((pos = strstr(js->sasl_mechs->str, js->current_mech))) {
g_string_erase(js->sasl_mechs, pos-js->sasl_mechs->str, strlen(js->current_mech));
}
/* Remove space which separated this mech from the next */
if ((js->sasl_mechs->str)[0] == ' ') {
g_string_erase(js->sasl_mechs, 0, 1);
}
again = TRUE;
}
sasl_dispose(&js->sasl);
}
} while (again);
if (js->sasl_state == SASL_CONTINUE || js->sasl_state == SASL_OK) {
xmlnode *auth = xmlnode_new("auth");
xmlnode_set_namespace(auth, NS_XMPP_SASL);
xmlnode_set_attrib(auth, "mechanism", js->current_mech);
xmlnode_set_attrib(auth, "xmlns:ga", "http://www.google.com/talk/protocol/auth");
xmlnode_set_attrib(auth, "ga:client-uses-full-bind-result", "true");
if (clientout) {
if (coutlen == 0) {
xmlnode_insert_data(auth, "=", -1);
} else {
enc_out = purple_base64_encode((unsigned char*)clientout, coutlen);
xmlnode_insert_data(auth, enc_out, -1);
g_free(enc_out);
}
}
*reply = auth;
return JABBER_SASL_STATE_CONTINUE;
} else {
return JABBER_SASL_STATE_FAIL;
}
}