static xt_status jabber_do_iq_auth( struct im_connection *ic, struct xt_node *node, struct xt_node *orig )
{
struct jabber_data *jd = ic->proto_data;
struct xt_node *reply, *query;
xt_status st;
char *s;
if( !( query = xt_find_node( node->children, "query" ) ) )
{
imcb_log( ic, "Warning: Received incomplete IQ packet while authenticating" );
imc_logout( ic, FALSE );
return XT_HANDLED;
}
/* Time to authenticate ourselves! */
reply = xt_new_node( "query", NULL, NULL );
xt_add_attr( reply, "xmlns", XMLNS_AUTH );
xt_add_child( reply, xt_new_node( "username", jd->username, NULL ) );
xt_add_child( reply, xt_new_node( "resource", set_getstr( &ic->acc->set, "resource" ), NULL ) );
if( xt_find_node( query->children, "digest" ) && ( s = xt_find_attr( jd->xt->root, "id" ) ) )
{
/* We can do digest authentication, it seems, and of
course we prefer that. */
sha1_state_t sha;
char hash_hex[41];
unsigned char hash[20];
int i;
sha1_init( &sha );
sha1_append( &sha, (unsigned char*) s, strlen( s ) );
sha1_append( &sha, (unsigned char*) ic->acc->pass, strlen( ic->acc->pass ) );
sha1_finish( &sha, hash );
for( i = 0; i < 20; i ++ )
sprintf( hash_hex + i * 2, "%02x", hash[i] );
xt_add_child( reply, xt_new_node( "digest", hash_hex, NULL ) );
}
else if( xt_find_node( query->children, "password" ) )
{
/* We'll have to stick with plaintext. Let's hope we're using SSL/TLS... */
xt_add_child( reply, xt_new_node( "password", ic->acc->pass, NULL ) );
}
else
{
xt_free_node( reply );
imcb_error( ic, "Can't find suitable authentication method" );
imc_logout( ic, FALSE );
return XT_ABORT;
}
reply = jabber_make_packet( "iq", "set", NULL, reply );
jabber_cache_add( ic, reply, jabber_finish_iq_auth );
st = jabber_write_packet( ic, reply );
return st ? XT_HANDLED : XT_ABORT;
}
static int jabber_buddy_msg( struct im_connection *ic, char *who, char *message, int flags )
{
struct jabber_data *jd = ic->proto_data;
struct jabber_buddy *bud;
struct xt_node *node;
char *s;
int st;
if( g_strcasecmp( who, JABBER_XMLCONSOLE_HANDLE ) == 0 )
return jabber_write( ic, message, strlen( message ) );
if( g_strcasecmp( who, JABBER_OAUTH_HANDLE ) == 0 &&
!( jd->flags & OPT_LOGGED_IN ) && jd->fd == -1 )
{
if( sasl_oauth2_get_refresh_token( ic, message ) )
{
return 1;
}
else
{
imcb_error( ic, "OAuth failure" );
imc_logout( ic, TRUE );
return 0;
}
}
if( ( s = strchr( who, '=' ) ) && jabber_chat_by_jid( ic, s + 1 ) )
bud = jabber_buddy_by_ext_jid( ic, who, 0 );
else
bud = jabber_buddy_by_jid( ic, who, GET_BUDDY_BARE_OK );
node = xt_new_node( "body", message, NULL );
node = jabber_make_packet( "message", "chat", bud ? bud->full_jid : who, node );
if( bud && ( jd->flags & JFLAG_WANT_TYPING ) &&
( ( bud->flags & JBFLAG_DOES_XEP85 ) ||
!( bud->flags & JBFLAG_PROBED_XEP85 ) ) )
{
struct xt_node *act;
/* If the user likes typing notification and if we don't know
(and didn't probe before) if this resource supports XEP85,
include a probe in this packet now. Also, if we know this
buddy does support XEP85, we have to send this <active/>
tag to tell that the user stopped typing (well, that's what
we guess when s/he pressed Enter...). */
act = xt_new_node( "active", NULL, NULL );
xt_add_attr( act, "xmlns", XMLNS_CHATSTATES );
xt_add_child( node, act );
/* Just make sure we do this only once. */
bud->flags |= JBFLAG_PROBED_XEP85;
}
st = jabber_write_packet( ic, node );
xt_free_node( node );
return st;
}
static gboolean xml_generate_nick( gpointer key, gpointer value, gpointer data )
{
struct xt_node *node = xt_new_node( "buddy", NULL, NULL );
xt_add_attr( node, "handle", key );
xt_add_attr( node, "nick", value );
xt_add_child( (struct xt_node *) data, node );
return FALSE;
}
/* Whenever presence information is updated, call this function to inform the
server. */
int presence_send_update( struct im_connection *ic )
{
struct jabber_data *jd = ic->proto_data;
struct xt_node *node, *cap;
char *show = jd->away_state->code;
char *status = jd->away_message;
struct groupchat *c;
int st;
node = jabber_make_packet( "presence", NULL, NULL, NULL );
xt_add_child( node, xt_new_node( "priority", set_getstr( &ic->acc->set, "priority" ), NULL ) );
if( show && *show )
xt_add_child( node, xt_new_node( "show", show, NULL ) );
if( status )
xt_add_child( node, xt_new_node( "status", status, NULL ) );
/* This makes the packet slightly bigger, but clients interested in
capabilities can now cache the discovery info. This reduces the
usual post-login iq-flood. See XEP-0115. At least libpurple and
Trillian seem to do this right. */
cap = xt_new_node( "c", NULL, NULL );
xt_add_attr( cap, "xmlns", XMLNS_CAPS );
xt_add_attr( cap, "node", "http://bitlbee.org/xmpp/caps" );
xt_add_attr( cap, "ver", BITLBEE_VERSION ); /* The XEP wants this hashed, but nobody's doing that. */
xt_add_child( node, cap );
st = jabber_write_packet( ic, node );
/* Have to send this update to all groupchats too, the server won't
do this automatically. */
for( c = ic->groupchats; c && st; c = c->next )
{
struct jabber_chat *jc = c->data;
xt_add_attr( node, "to", jc->my_full_jid );
st = jabber_write_packet( ic, node );
}
xt_free_node( node );
return st;
}
static void xml_generate_settings( struct xt_node *cur, set_t **head )
{
set_t *set;
for( set = *head; set; set = set->next )
if( set->value && !( set->flags & SET_NOSAVE ) )
{
struct xt_node *xset;
xt_add_child( cur, xset = xt_new_node( "setting", set->value, NULL ) );
xt_add_attr( xset, "name", set->key );
}
}
struct groupchat *jabber_chat_join(struct im_connection *ic, const char *room, const char *nick, const char *password)
{
struct jabber_chat *jc;
struct xt_node *node;
struct groupchat *c;
char *roomjid;
roomjid = g_strdup_printf("%s/%s", room, nick);
node = xt_new_node("x", NULL, NULL);
xt_add_attr(node, "xmlns", XMLNS_MUC);
if (password) {
xt_add_child(node, xt_new_node("password", password, NULL));
}
node = jabber_make_packet("presence", NULL, roomjid, node);
jabber_cache_add(ic, node, jabber_chat_join_failed);
if (!jabber_write_packet(ic, node)) {
g_free(roomjid);
return NULL;
}
jc = g_new0(struct jabber_chat, 1);
jc->name = jabber_normalize(room);
if ((jc->me = jabber_buddy_add(ic, roomjid)) == NULL) {
g_free(roomjid);
g_free(jc->name);
g_free(jc);
return NULL;
}
/* roomjid isn't normalized yet, and we need an original version
of the nick to send a proper presence update. */
jc->my_full_jid = roomjid;
c = imcb_chat_new(ic, room);
c->data = jc;
return c;
}
int jabber_add_to_roster( struct im_connection *ic, const char *handle, const char *name, const char *group )
{
struct xt_node *node;
int st;
/* Build the item entry */
node = xt_new_node( "item", NULL, NULL );
xt_add_attr( node, "jid", handle );
if( name )
xt_add_attr( node, "name", name );
if( group )
xt_add_child( node, xt_new_node( "group", group, NULL ) );
/* And pack it into a roster-add packet */
node = xt_new_node( "query", NULL, node );
xt_add_attr( node, "xmlns", XMLNS_ROSTER );
node = jabber_make_packet( "iq", "set", NULL, node );
jabber_cache_add( ic, node, jabber_add_to_roster_callback );
st = jabber_write_packet( ic, node );
return st;
}
struct xt_node *xml_generate( irc_t *irc )
{
char *pass_buf = NULL;
account_t *acc;
md5_byte_t pass_md5[21];
md5_state_t md5_state;
GSList *l;
struct xt_node *root, *cur;
/* Generate a salted md5sum of the password. Use 5 bytes for the salt
(to prevent dictionary lookups of passwords) to end up with a 21-
byte password hash, more convenient for base64 encoding. */
random_bytes( pass_md5 + 16, 5 );
md5_init( &md5_state );
md5_append( &md5_state, (md5_byte_t*) irc->password, strlen( irc->password ) );
md5_append( &md5_state, pass_md5 + 16, 5 ); /* Add the salt. */
md5_finish( &md5_state, pass_md5 );
/* Save the hash in base64-encoded form. */
pass_buf = base64_encode( pass_md5, 21 );
root = cur = xt_new_node( "user", NULL, NULL );
xt_add_attr( cur, "nick", irc->user->nick );
xt_add_attr( cur, "password", pass_buf );
xt_add_attr( cur, "version", XML_FORMAT_VERSION );
g_free( pass_buf );
xml_generate_settings( cur, &irc->b->set );
for( acc = irc->b->accounts; acc; acc = acc->next )
{
unsigned char *pass_cr;
char *pass_b64;
int pass_len;
pass_len = arc_encode( acc->pass, strlen( acc->pass ), (unsigned char**) &pass_cr, irc->password, 12 );
pass_b64 = base64_encode( pass_cr, pass_len );
g_free( pass_cr );
cur = xt_new_node( "account", NULL, NULL );
xt_add_attr( cur, "protocol", acc->prpl->name );
xt_add_attr( cur, "handle", acc->user );
xt_add_attr( cur, "password", pass_b64 );
xt_add_attr( cur, "autoconnect", acc->auto_connect ? "true" : "false" );
xt_add_attr( cur, "tag", acc->tag );
if( acc->server && acc->server[0] )
xt_add_attr( cur, "server", acc->server );
g_free( pass_b64 );
/* This probably looks pretty strange. g_hash_table_foreach
is quite a PITA already (but it can't get much better in
C without using #define, I'm afraid), and it
doesn't seem to be possible to abort the foreach on write
errors, so instead let's use the _find function and
return TRUE on write errors. Which means, if we found
something, there was an error. :-) */
g_hash_table_find( acc->nicks, xml_generate_nick, cur );
xml_generate_settings( cur, &acc->set );
xt_add_child( root, cur );
}
for( l = irc->channels; l; l = l->next )
{
irc_channel_t *ic = l->data;
if( ic->flags & IRC_CHANNEL_TEMP )
continue;
cur = xt_new_node( "channel", NULL, NULL );
xt_add_attr( cur, "name", ic->name );
xt_add_attr( cur, "type", set_getstr( &ic->set, "type" ) );
xml_generate_settings( cur, &ic->set );
xt_add_child( root, cur );
}
return root;
}
xt_status jabber_pkt_iq( struct xt_node *node, gpointer data )
{
struct im_connection *ic = data;
struct jabber_data *jd = ic->proto_data;
struct xt_node *c, *reply = NULL;
char *type, *s;
int st, pack = 1;
type = xt_find_attr( node, "type" );
if( !type )
{
imcb_error( ic, "Received IQ packet without type." );
imc_logout( ic, TRUE );
return XT_ABORT;
}
if( strcmp( type, "result" ) == 0 || strcmp( type, "error" ) == 0 )
{
return jabber_cache_handle_packet( ic, node );
}
else if( strcmp( type, "get" ) == 0 )
{
if( !( ( c = xt_find_node( node->children, "query" ) ) ||
( c = xt_find_node( node->children, "ping" ) ) ||
( c = xt_find_node( node->children, "time" ) ) ) ||
!( s = xt_find_attr( c, "xmlns" ) ) )
{
/* Sigh. Who decided to suddenly invent new elements
instead of just sticking with <query/>? */
return XT_HANDLED;
}
reply = xt_new_node( "query", NULL, NULL );
xt_add_attr( reply, "xmlns", s );
/* Of course this is a very essential query to support. ;-) */
if( strcmp( s, XMLNS_VERSION ) == 0 )
{
xt_add_child( reply, xt_new_node( "name", set_getstr( &ic->acc->set, "user_agent" ), NULL ) );
xt_add_child( reply, xt_new_node( "version", BITLBEE_VERSION, NULL ) );
xt_add_child( reply, xt_new_node( "os", ARCH, NULL ) );
}
else if( strcmp( s, XMLNS_TIME_OLD ) == 0 )
{
time_t time_ep;
char buf[1024];
buf[sizeof(buf)-1] = 0;
time_ep = time( NULL );
strftime( buf, sizeof( buf ) - 1, "%Y%m%dT%H:%M:%S", gmtime( &time_ep ) );
xt_add_child( reply, xt_new_node( "utc", buf, NULL ) );
strftime( buf, sizeof( buf ) - 1, "%Z", localtime( &time_ep ) );
xt_add_child( reply, xt_new_node( "tz", buf, NULL ) );
}
else if( strcmp( s, XMLNS_TIME ) == 0 )
{
time_t time_ep;
char buf[1024];
buf[sizeof(buf)-1] = 0;
time_ep = time( NULL );
xt_free_node( reply );
reply = xt_new_node( "time", NULL, NULL );
xt_add_attr( reply, "xmlns", XMLNS_TIME );
strftime( buf, sizeof( buf ) - 1, "%Y%m%dT%H:%M:%SZ", gmtime( &time_ep ) );
xt_add_child( reply, xt_new_node( "utc", buf, NULL ) );
strftime( buf, sizeof( buf ) - 1, "%z", localtime( &time_ep ) );
if( strlen( buf ) >= 5 )
{
buf[6] = '\0';
buf[5] = buf[4];
buf[4] = buf[3];
buf[3] = ':';
}
xt_add_child( reply, xt_new_node( "tzo", buf, NULL ) );
}
else if( strcmp( s, XMLNS_PING ) == 0 )
{
xt_free_node( reply );
reply = jabber_make_packet( "iq", "result", xt_find_attr( node, "from" ), NULL );
if( ( s = xt_find_attr( node, "id" ) ) )
xt_add_attr( reply, "id", s );
pack = 0;
}
else if( strcmp( s, XMLNS_DISCO_INFO ) == 0 )
{
const char *features[] = { XMLNS_DISCO_INFO,
XMLNS_VERSION,
XMLNS_TIME_OLD,
XMLNS_TIME,
XMLNS_CHATSTATES,
XMLNS_MUC,
XMLNS_PING,
XMLNS_SI,
XMLNS_BYTESTREAMS,
XMLNS_FILETRANSFER,
NULL };
const char **f;
c = xt_new_node( "identity", NULL, NULL );
xt_add_attr( c, "category", "client" );
xt_add_attr( c, "type", "pc" );
xt_add_attr( c, "name", set_getstr( &ic->acc->set, "user_agent" ) );
xt_add_child( reply, c );
for( f = features; *f; f ++ )
{
c = xt_new_node( "feature", NULL, NULL );
xt_add_attr( c, "var", *f );
xt_add_child( reply, c );
}
}
else
{
xt_free_node( reply );
reply = jabber_make_error_packet( node, "feature-not-implemented", "cancel", NULL );
pack = 0;
}
}
else if( strcmp( type, "set" ) == 0 )
{
if( ( c = xt_find_node( node->children, "si" ) ) &&
( s = xt_find_attr( c, "xmlns" ) ) &&
( strcmp( s, XMLNS_SI ) == 0 ) )
{
return jabber_si_handle_request( ic, node, c );
}
else if( !( c = xt_find_node( node->children, "query" ) ) ||
!( s = xt_find_attr( c, "xmlns" ) ) )
{
return XT_HANDLED;
}
else if( strcmp( s, XMLNS_ROSTER ) == 0 )
{
/* This is a roster push. XMPP servers send this when someone
was added to (or removed from) the buddy list. AFAIK they're
sent even if we added this buddy in our own session. */
int bare_len = strlen( jd->me );
if( ( s = xt_find_attr( node, "from" ) ) == NULL ||
( strncmp( s, jd->me, bare_len ) == 0 &&
( s[bare_len] == 0 || s[bare_len] == '/' ) ) )
{
jabber_parse_roster( ic, node, NULL );
/* Should we generate a reply here? Don't think it's
very important... */
}
else
{
imcb_log( ic, "Warning: %s tried to fake a roster push!", s ? s : "(unknown)" );
xt_free_node( reply );
reply = jabber_make_error_packet( node, "not-allowed", "cancel", NULL );
pack = 0;
}
}
else if( strcmp( s, XMLNS_BYTESTREAMS ) == 0 )
{
/* Bytestream Request (stage 2 of file transfer) */
return jabber_bs_recv_request( ic, node, c );
}
else
{
xt_free_node( reply );
reply = jabber_make_error_packet( node, "feature-not-implemented", "cancel", NULL );
pack = 0;
}
}
/* If we recognized the xmlns and managed to generate a reply,
finish and send it. */
if( reply )
{
/* Normally we still have to pack it into an iq-result
packet, but for errors, for example, we don't. */
if( pack )
{
reply = jabber_make_packet( "iq", "result", xt_find_attr( node, "from" ), reply );
if( ( s = xt_find_attr( node, "id" ) ) )
xt_add_attr( reply, "id", s );
}
st = jabber_write_packet( ic, reply );
xt_free_node( reply );
if( !st )
return XT_ABORT;
}
return XT_HANDLED;
}
struct xt_node *xml_generate(irc_t *irc)
{
char *pass_buf = NULL;
account_t *acc;
md5_byte_t pass_md5[21];
md5_state_t md5_state;
GSList *l;
struct xt_node *root, *cur;
root = cur = xt_new_node("user", NULL, NULL);
if (irc->auth_backend) {
xt_add_attr(cur, "auth_backend", irc->auth_backend);
} else {
/* Generate a salted md5sum of the password. Use 5 bytes for the salt
(to prevent dictionary lookups of passwords) to end up with a 21-
byte password hash, more convenient for base64 encoding. */
random_bytes(pass_md5 + 16, 5);
md5_init(&md5_state);
md5_append(&md5_state, (md5_byte_t *) irc->password, strlen(irc->password));
md5_append(&md5_state, pass_md5 + 16, 5); /* Add the salt. */
md5_finish(&md5_state, pass_md5);
/* Save the hash in base64-encoded form. */
pass_buf = base64_encode(pass_md5, 21);
xt_add_attr(cur, "password", pass_buf);
g_free(pass_buf);
}
xt_add_attr(cur, "nick", irc->user->nick);
xt_add_attr(cur, "version", XML_FORMAT_VERSION);
xml_generate_settings(cur, &irc->b->set);
for (acc = irc->b->accounts; acc; acc = acc->next) {
GHashTableIter iter;
gpointer key, value;
unsigned char *pass_cr;
char *pass_b64;
int pass_len;
if(irc->auth_backend) {
/* If we don't "own" the password, it may change without us
* knowing, so we cannot encrypt the data, as we then may not be
* able to decrypt it */
pass_b64 = base64_encode((unsigned char *)acc->pass, strlen(acc->pass));
} else {
pass_len = arc_encode(acc->pass, strlen(acc->pass), (unsigned char **) &pass_cr, irc->password, 12);
pass_b64 = base64_encode(pass_cr, pass_len);
g_free(pass_cr);
}
cur = xt_new_node("account", NULL, NULL);
xt_add_attr(cur, "protocol", acc->prpl->name);
xt_add_attr(cur, "handle", acc->user);
xt_add_attr(cur, "password", pass_b64);
xt_add_attr(cur, "autoconnect", acc->auto_connect ? "true" : "false");
xt_add_attr(cur, "tag", acc->tag);
if (acc->server && acc->server[0]) {
xt_add_attr(cur, "server", acc->server);
}
if (acc->flags & ACC_FLAG_LOCKED) {
xt_add_attr(cur, "locked", "true");
}
g_free(pass_b64);
g_hash_table_iter_init(&iter, acc->nicks);
while (g_hash_table_iter_next(&iter, &key, &value)) {
struct xt_node *node = xt_new_node("buddy", NULL, NULL);
xt_add_attr(node, "handle", key);
xt_add_attr(node, "nick", value);
xt_add_child(cur, node);
}
xml_generate_settings(cur, &acc->set);
xt_add_child(root, cur);
}
for (l = irc->channels; l; l = l->next) {
irc_channel_t *ic = l->data;
if (ic->flags & IRC_CHANNEL_TEMP) {
continue;
}
cur = xt_new_node("channel", NULL, NULL);
xt_add_attr(cur, "name", ic->name);
xt_add_attr(cur, "type", set_getstr(&ic->set, "type"));
xml_generate_settings(cur, &ic->set);
xt_add_child(root, cur);
}
return root;
}
