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source: otr.c @ 12442ed

Last change on this file since 12442ed was 0b1ae59, checked in by dequis <dx@…>, at 2015-10-13T05:05:36Z

otr: fix trailing whitespace issues with 'otr forget key'

Fixes trac ticket 1089, https://bugs.bitlbee.org/bitlbee/ticket/1089

Property mode set to 100644

File size: 59.3 KB

Rev	Line
[5ebff60]	1	/********************************************************************\
[e2b15bb]	2	* BitlBee -- An IRC to other IM-networks gateway *
	3	* *
[0e788f5]	4	* Copyright 2002-2012 Wilmer van der Gaast and others *
[e2b15bb]	5	\********************************************************************/
	6
	7	/*
	8	OTR support (cf. http://www.cypherpunks.ca/otr/)
[5ebff60]	9
[81265e0]	10	(c) 2008-2011,2013 Sven Moritz Hallberg <pesco@khjk.org>
	11	funded by stonedcoder.org
[5ebff60]	12
[e2b15bb]	13	files used to store OTR data:
	14	<configdir>/<nick>.otr_keys
	15	<configdir>/<nick>.otr_fprints
[e4752a6]	16	<configdir>/<nick>.otr_instags <- don't copy this one between hosts
[5ebff60]	17
[e2b15bb]	18	top-level todos: (search for TODO for more ;-))
	19	integrate otr_load/otr_save with existing storage backends
	20	per-account policy settings
	21	per-user policy settings
[e4752a6]	22	add a way to select recipient instance
[e2b15bb]	23	*/
	24
	25	/*
	26	This program is free software; you can redistribute it and/or modify
	27	it under the terms of the GNU General Public License as published by
	28	the Free Software Foundation; either version 2 of the License, or
	29	(at your option) any later version.
	30
	31	This program is distributed in the hope that it will be useful,
	32	but WITHOUT ANY WARRANTY; without even the implied warranty of
	33	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	34	GNU General Public License for more details.
	35
	36	You should have received a copy of the GNU General Public License with
	37	the Debian GNU/Linux distribution in /usr/share/common-licenses/GPL;
[6f10697]	38	if not, write to the Free Software Foundation, Inc., 51 Franklin St.,
	39	Fifth Floor, Boston, MA 02110-1301 USA
[e2b15bb]	40	*/
	41
[764c7d1]	42	#include "bitlbee.h"
	43	#include "irc.h"
	44	#include "otr.h"
	45	#include <sys/types.h>
[27db433]	46	#include <sys/wait.h>
[764c7d1]	47	#include <unistd.h>
[dc9797f]	48	#include <assert.h>
[6738a67]	49	#include <signal.h>
[764c7d1]	50
	51
	52	/ OTR interface routines for the OtrlMessageAppOps struct: /
	53
	54	OtrlPolicy op_policy(void opdata, ConnContext context);
	55
	56	void op_create_privkey(void opdata, const char accountname, const char *protocol);
	57
	58	int op_is_logged_in(void opdata, const char accountname, const char *protocol,
[5ebff60]	59	const char *recipient);
[764c7d1]	60
	61	void op_inject_message(void opdata, const char accountname, const char *protocol,
[5ebff60]	62	const char recipient, const char message);
[764c7d1]	63
	64	void op_new_fingerprint(void opdata, OtrlUserState us, const char accountname,
[5ebff60]	65	const char protocol, const char username, unsigned char fingerprint[20]);
[764c7d1]	66
	67	void op_write_fingerprints(void *opdata);
	68
	69	void op_gone_secure(void opdata, ConnContext context);
	70
	71	void op_gone_insecure(void opdata, ConnContext context);
	72
	73	void op_still_secure(void opdata, ConnContext context, int is_reply);
	74
	75	void op_log_message(void opdata, const char message);
	76
[a13855a]	77	int op_max_message_size(void opdata, ConnContext context);
[764c7d1]	78
[a13855a]	79	const char op_account_name(void opdata, const char account, const char protocol);
[764c7d1]	80
[e65039a]	81	void op_create_instag(void opdata, const char account, const char *protocol);
	82
[5d2bc9d]	83	void op_convert_msg(void opdata, ConnContext ctx, OtrlConvertType typ,
[5ebff60]	84	char *dst, const char src);
[5d2bc9d]	85	void op_convert_free(void opdata, ConnContext ctx, char *msg);
	86
[352a6b0]	87	void op_handle_smp_event(void opdata, OtrlSMPEvent ev, ConnContext ctx,
[5ebff60]	88	unsigned short percent, char *question);
[764c7d1]	89
[090c9b7]	90	void op_handle_msg_event(void opdata, OtrlMessageEvent ev, ConnContext ctx,
[5ebff60]	91	const char *message, gcry_error_t err);
[090c9b7]	92
[6d9f0ba]	93	const char op_otr_error_message(void opdata, ConnContext *ctx,
[5ebff60]	94	OtrlErrorCode err_code);
[6d9f0ba]	95
[764c7d1]	96	/ otr sub-command handlers: /
	97
[8358691]	98	static void cmd_otr(irc_t irc, char *args);
[8521b02]	99	void cmd_otr_connect(irc_t irc, char *args);
	100	void cmd_otr_disconnect(irc_t irc, char *args);
[69ef042]	101	void cmd_otr_reconnect(irc_t irc, char *args);
[5a71d9c]	102	void cmd_otr_smp(irc_t irc, char *args);
[99a01b9]	103	void cmd_otr_smpq(irc_t irc, char *args);
[5a71d9c]	104	void cmd_otr_trust(irc_t irc, char *args);
[764c7d1]	105	void cmd_otr_info(irc_t irc, char *args);
[94e7eb3]	106	void cmd_otr_keygen(irc_t irc, char *args);
[c595308]	107	void cmd_otr_forget(irc_t irc, char *args);
[764c7d1]	108
	109	const command_t otr_commands[] = {
[8521b02]	110	{ "connect", 1, &cmd_otr_connect, 0 },
	111	{ "disconnect", 1, &cmd_otr_disconnect, 0 },
[69ef042]	112	{ "reconnect", 1, &cmd_otr_reconnect, 0 },
[8521b02]	113	{ "smp", 2, &cmd_otr_smp, 0 },
[99a01b9]	114	{ "smpq", 3, &cmd_otr_smpq, 0 },
[8521b02]	115	{ "trust", 6, &cmd_otr_trust, 0 },
	116	{ "info", 0, &cmd_otr_info, 0 },
[94e7eb3]	117	{ "keygen", 1, &cmd_otr_keygen, 0 },
[c595308]	118	{ "forget", 2, &cmd_otr_forget, 0 },
[764c7d1]	119	{ NULL }
	120	};
	121
[6738a67]	122	typedef struct {
	123	void *fst;
	124	void *snd;
[5ebff60]	125	} pair_t;
[6738a67]	126
[0c85c08]	127	static OtrlMessageAppOps otr_ops; /* collects interface functions required by OTR */
	128
[764c7d1]	129
	130	/ misc. helpers/subroutines: /
	131
[dc9797f]	132	/* check whether we are already generating a key for a given account */
	133	int keygen_in_progress(irc_t irc, const char handle, const char *protocol);
	134
[522a00f]	135	/* start background process to generate a (new) key for a given account */
[764c7d1]	136	void otr_keygen(irc_t irc, const char handle, const char *protocol);
[c595308]	137
[27db433]	138	/* main function for the forked keygen slave */
[12cc58b]	139	void keygen_child_main(OtrlUserState us, int infd, int outfd);
[27db433]	140
[522a00f]	141	/* mainloop handler for when a keygen finishes */
[764c7d1]	142	gboolean keygen_finish_handler(gpointer data, gint fd, b_input_condition cond);
[c595308]	143
[27db433]	144	/* copy the contents of file a to file b, overwriting it if it exists */
	145	void copyfile(const char a, const char b);
	146
	147	/* read one line of input from a stream, excluding trailing newline */
	148	void myfgets(char s, int size, FILE stream);
	149
[c595308]	150	/* some yes/no handlers */
[6738a67]	151	void yes_keygen(void *data);
	152	void yes_forget_fingerprint(void *data);
	153	void yes_forget_context(void *data);
	154	void yes_forget_key(void *data);
[764c7d1]	155
[22ec21d]	156	/* timeout handler that calls otrl_message_poll */
	157	gboolean ev_message_poll(gpointer data, gint fd, b_input_condition cond);
	158
[764c7d1]	159	/* helper to make sure accountname and protocol match the incoming "opdata" */
	160	struct im_connection check_imc(void opdata, const char *accountname,
[5ebff60]	161	const char *protocol);
[764c7d1]	162
[5a71d9c]	163	/* determine the nick for a given handle/protocol pair
	164	returns "handle/protocol" if not found */
[764c7d1]	165	const char peernick(irc_t irc, const char handle, const char protocol);
	166
[8521b02]	167	/* turn a hexadecimal digit into its numerical value */
	168	int hexval(char a);
	169
[ad2d8bc]	170	/* determine the irc_user_t for a given handle/protocol pair
[5a71d9c]	171	returns NULL if not found */
[ad2d8bc]	172	irc_user_t peeruser(irc_t irc, const char handle, const char protocol);
[5a71d9c]	173
[090c9b7]	174	/* show an otr-related message to the user */
	175	void display_otr_message(void opdata, ConnContext ctx, const char *fmt, ...);
	176
	177	/* write an otr-related message to the system log */
	178	void log_otr_message(void opdata, const char fmt, ...);
	179
[99a01b9]	180	/* combined handler for the 'otr smp' and 'otr smpq' commands */
[7c91392]	181	void otr_smp_or_smpq(irc_t irc, const char nick, const char *question,
[5ebff60]	182	const char *secret);
[99a01b9]	183
[a0c6fc5]	184	/* update flags within the irc_user structure to reflect OTR status of context */
	185	void otr_update_uflags(ConnContext context, irc_user_t u);
	186
[5a71d9c]	187	/* update op/voice flag of given user according to encryption state and settings
	188	returns 0 if neither op_buddies nor voice_buddies is set to "encrypted",
[e88fe7da]	189	i.e. msgstate should be announced separately */
[ad2d8bc]	190	int otr_update_modeflags(irc_t irc, irc_user_t u);
[5a71d9c]	191
[8521b02]	192	/* show general info about the OTR subsystem; called by 'otr info' */
	193	void show_general_otr_info(irc_t *irc);
	194
[2c81d15]	195	/* show info about a given OTR context and subcontexts/instances. bestctx
	196	may be either NULL or preferred destination context (this is hilighted
	197	in the output as being the target for a message) */
	198	void show_otr_context_info(irc_t irc, ConnContext ctx, ConnContext *bestctx);
[8521b02]	199
[764c7d1]	200	/* show the list of fingerprints associated with a given context */
	201	void show_fingerprints(irc_t irc, ConnContext ctx);
	202
[c595308]	203	/* find a fingerprint by prefix (given as any number of hex strings) */
	204	Fingerprint match_fingerprint(irc_t irc, ConnContext ctx, const char *args);
	205
[5f4eede]	206	/* find a private key by fingerprint prefix (given as any number of hex strings) */
	207	OtrlPrivKey match_privkey(irc_t irc, const char **args);
	208
[c7b94ef]	209	/* check whether a string is safe to use in a path component */
	210	int strsane(const char *s);
	211
[c239fff]	212	/* close the OTR connection with the given buddy */
	213	gboolean otr_disconnect_user(irc_t irc, irc_user_t u);
	214
	215	/* close all active OTR connections */
	216	void otr_disconnect_all(irc_t *irc);
	217
[86fd261]	218	/* modifies string in-place, replacing \x03 with '?',
	219	as a quick way to prevent remote users from messing with irc colors */
	220	static char otr_filter_colors(char msg);
	221
[0c85c08]	222	/* functions to be called for certain events */
	223	static const struct irc_plugin otr_plugin;
	224
[654112d4]	225	#define OTR_COLOR_TRUSTED "03" /* green */
	226	#define OTR_COLOR_UNTRUSTED "05" /* red */
	227
[764c7d1]	228	/* routines declared in otr.h: */
	229
[858ea01]	230	#ifdef OTR_BI
	231	#define init_plugin otr_init
	232	#endif
	233
	234	void init_plugin(void)
[764c7d1]	235	{
	236	OTRL_INIT;
[5ebff60]	237
[764c7d1]	238	/* fill global OtrlMessageAppOps */
[0c85c08]	239	otr_ops.policy = &op_policy;
	240	otr_ops.create_privkey = &op_create_privkey;
	241	otr_ops.is_logged_in = &op_is_logged_in;
	242	otr_ops.inject_message = &op_inject_message;
	243	otr_ops.update_context_list = NULL;
	244	otr_ops.new_fingerprint = &op_new_fingerprint;
	245	otr_ops.write_fingerprints = &op_write_fingerprints;
	246	otr_ops.gone_secure = &op_gone_secure;
	247	otr_ops.gone_insecure = &op_gone_insecure;
	248	otr_ops.still_secure = &op_still_secure;
	249	otr_ops.max_message_size = &op_max_message_size;
	250	otr_ops.account_name = &op_account_name;
	251	otr_ops.account_name_free = NULL;
[81265e0]	252
	253	/* stuff added with libotr 4.0.0 */
	254	otr_ops.received_symkey = NULL; /* we don't use the extra key */
[6d9f0ba]	255	otr_ops.otr_error_message = &op_otr_error_message;
[81265e0]	256	otr_ops.otr_error_message_free = NULL;
[6d9f0ba]	257	otr_ops.resent_msg_prefix = NULL; /* default: [resent] */
[81265e0]	258	otr_ops.resent_msg_prefix_free = NULL;
[352a6b0]	259	otr_ops.handle_smp_event = &op_handle_smp_event;
[090c9b7]	260	otr_ops.handle_msg_event = &op_handle_msg_event;
[e65039a]	261	otr_ops.create_instag = &op_create_instag;
[5d2bc9d]	262	otr_ops.convert_msg = &op_convert_msg;
	263	otr_ops.convert_free = &op_convert_free;
[5ebff60]	264	otr_ops.timer_control = NULL; /* we just poll */
	265
	266	root_command_add("otr", 1, cmd_otr, 0);
	267	register_irc_plugin(&otr_plugin);
[764c7d1]	268	}
	269
[0c85c08]	270	gboolean otr_irc_new(irc_t *irc)
[dc9797f]	271	{
[0c85c08]	272	set_t *s;
	273	GSList *l;
[5ebff60]	274
[0c85c08]	275	irc->otr = g_new0(otr_t, 1);
	276	irc->otr->us = otrl_userstate_create();
[5ebff60]	277
	278	s = set_add(&irc->b->set, "otr_color_encrypted", "true", set_eval_bool, irc);
	279
	280	s = set_add(&irc->b->set, "otr_policy", "opportunistic", set_eval_list, irc);
	281	l = g_slist_prepend(NULL, "never");
	282	l = g_slist_prepend(l, "opportunistic");
	283	l = g_slist_prepend(l, "manual");
	284	l = g_slist_prepend(l, "always");
[0c85c08]	285	s->eval_data = l;
[1082395]	286
[5ebff60]	287	s = set_add(&irc->b->set, "otr_does_html", "true", set_eval_bool, irc);
	288
[22ec21d]	289	/* regularly call otrl_message_poll */
	290	gint definterval = otrl_message_poll_get_default_interval(irc->otr->us);
[c347a12]	291	irc->otr->timer = b_timeout_add(definterval, ev_message_poll, irc->otr);
[22ec21d]	292
[0c85c08]	293	return TRUE;
[dc9797f]	294	}
	295
[0c85c08]	296	void otr_irc_free(irc_t *irc)
[dc9797f]	297	{
[098a75b]	298	set_t *s;
[0c85c08]	299	otr_t *otr = irc->otr;
[5ebff60]	300
[c239fff]	301	otr_disconnect_all(irc);
[c347a12]	302	b_event_remove(otr->timer);
[dc9797f]	303	otrl_userstate_free(otr->us);
[098a75b]	304
	305	s = set_find(&irc->b->set, "otr_policy");
	306	g_slist_free(s->eval_data);
	307
[5ebff60]	308	if (otr->keygen) {
[dc9797f]	309	kill(otr->keygen, SIGTERM);
	310	waitpid(otr->keygen, NULL, 0);
	311	/* TODO: remove stale keygen tempfiles */
	312	}
[5ebff60]	313	if (otr->to) {
[dc9797f]	314	fclose(otr->to);
[5ebff60]	315	}
	316	if (otr->from) {
[dc9797f]	317	fclose(otr->from);
[5ebff60]	318	}
	319	while (otr->todo) {
[dc9797f]	320	kg_t *p = otr->todo;
	321	otr->todo = p->next;
	322	g_free(p);
	323	}
	324	g_free(otr);
	325	}
	326
[764c7d1]	327	void otr_load(irc_t *irc)
	328	{
	329	char s[512];
	330	account_t *a;
	331	gcry_error_t e;
[522a00f]	332	gcry_error_t enoent = gcry_error_from_errno(ENOENT);
[5ebff60]	333	int kg = 0;
[764c7d1]	334
[5ebff60]	335	if (strsane(irc->user->nick)) {
[c7b94ef]	336	g_snprintf(s, 511, "%s%s.otr_keys", global.conf->configdir, irc->user->nick);
	337	e = otrl_privkey_read(irc->otr->us, s);
[5ebff60]	338	if (e && e != enoent) {
[c7b94ef]	339	irc_rootmsg(irc, "otr load: %s: %s", s, gcry_strerror(e));
	340	}
	341	g_snprintf(s, 511, "%s%s.otr_fprints", global.conf->configdir, irc->user->nick);
	342	e = otrl_privkey_read_fingerprints(irc->otr->us, s, NULL, NULL);
[5ebff60]	343	if (e && e != enoent) {
[c7b94ef]	344	irc_rootmsg(irc, "otr load: %s: %s", s, gcry_strerror(e));
	345	}
[e65039a]	346	g_snprintf(s, 511, "%s%s.otr_instags", global.conf->configdir, irc->user->nick);
	347	e = otrl_instag_read(irc->otr->us, s);
[5ebff60]	348	if (e && e != enoent) {
[e65039a]	349	irc_rootmsg(irc, "otr load: %s: %s", s, gcry_strerror(e));
	350	}
[764c7d1]	351	}
[5ebff60]	352
[764c7d1]	353	/* check for otr keys on all accounts */
[5ebff60]	354	for (a = irc->b->accounts; a; a = a->next) {
[3064ea4]	355	kg = otr_check_for_key(a) \|\| kg;
	356	}
[5ebff60]	357	if (kg) {
[e67e513]	358	irc_rootmsg(irc, "Notice: "
[5ebff60]	359	"The accounts above do not have OTR encryption keys associated with them, yet. "
	360	"These keys are now being generated in the background. "
	361	"You will be notified as they are completed. "
	362	"It is not necessary to wait; "
	363	"BitlBee can be used normally during key generation. "
	364	"You may safely ignore this message if you don't know what OTR is. ;)");
[764c7d1]	365	}
	366	}
	367
	368	void otr_save(irc_t *irc)
	369	{
	370	char s[512];
[3c80a9d]	371	gcry_error_t e;
[764c7d1]	372
[5ebff60]	373	if (strsane(irc->user->nick)) {
[c7b94ef]	374	g_snprintf(s, 511, "%s%s.otr_fprints", global.conf->configdir, irc->user->nick);
	375	e = otrl_privkey_write_fingerprints(irc->otr->us, s);
[5ebff60]	376	if (e) {
[c7b94ef]	377	irc_rootmsg(irc, "otr save: %s: %s", s, gcry_strerror(e));
	378	}
	379	chmod(s, 0600);
[3c80a9d]	380	}
[764c7d1]	381	}
	382
	383	void otr_remove(const char *nick)
	384	{
	385	char s[512];
[5ebff60]	386
	387	if (strsane(nick)) {
[c7b94ef]	388	g_snprintf(s, 511, "%s%s.otr_keys", global.conf->configdir, nick);
	389	unlink(s);
	390	g_snprintf(s, 511, "%s%s.otr_fprints", global.conf->configdir, nick);
	391	unlink(s);
	392	}
[764c7d1]	393	}
	394
	395	void otr_rename(const char onick, const char nnick)
	396	{
	397	char s[512], t[512];
[5ebff60]	398
	399	if (strsane(nnick) && strsane(onick)) {
[c7b94ef]	400	g_snprintf(s, 511, "%s%s.otr_keys", global.conf->configdir, onick);
	401	g_snprintf(t, 511, "%s%s.otr_keys", global.conf->configdir, nnick);
[5ebff60]	402	rename(s, t);
[c7b94ef]	403	g_snprintf(s, 511, "%s%s.otr_fprints", global.conf->configdir, onick);
	404	g_snprintf(t, 511, "%s%s.otr_fprints", global.conf->configdir, nnick);
[5ebff60]	405	rename(s, t);
[c7b94ef]	406	}
[764c7d1]	407	}
	408
[3064ea4]	409	int otr_check_for_key(account_t *a)
[764c7d1]	410	{
[ad2d8bc]	411	irc_t *irc = a->bee->ui_data;
[a13855a]	412	OtrlPrivKey *k;
[5ebff60]	413
[1dd3470]	414	/* don't do OTR on certain (not classic IM) protocols, e.g. twitter */
[5ebff60]	415	if (a->prpl->options & OPT_NOOTR) {
[1dd3470]	416	return 0;
	417	}
[5ebff60]	418
[dc9797f]	419	k = otrl_privkey_find(irc->otr->us, a->user, a->prpl->name);
[5ebff60]	420	if (k) {
[e67e513]	421	irc_rootmsg(irc, "otr: %s/%s ready", a->user, a->prpl->name);
[3064ea4]	422	return 0;
[5ebff60]	423	}
	424	if (keygen_in_progress(irc, a->user, a->prpl->name)) {
[e67e513]	425	irc_rootmsg(irc, "otr: keygen for %s/%s already in progress", a->user, a->prpl->name);
[3064ea4]	426	return 0;
[764c7d1]	427	} else {
[e67e513]	428	irc_rootmsg(irc, "otr: starting background keygen for %s/%s", a->user, a->prpl->name);
[764c7d1]	429	otr_keygen(irc, a->user, a->prpl->name);
[3064ea4]	430	return 1;
[764c7d1]	431	}
	432	}
	433
[934db064]	434	char otr_filter_msg_in(irc_user_t iu, char *msg, int flags)
[764c7d1]	435	{
	436	int ignore_msg;
	437	char *newmsg = NULL;
	438	OtrlTLV *tlvs = NULL;
[934db064]	439	irc_t *irc = iu->irc;
	440	struct im_connection *ic = iu->bu->ic;
[5ebff60]	441
[1dd3470]	442	/* don't do OTR on certain (not classic IM) protocols, e.g. twitter */
[5ebff60]	443	if (ic->acc->prpl->options & OPT_NOOTR) {
[934db064]	444	return msg;
[1dd3470]	445	}
[5ebff60]	446
[0c85c08]	447	ignore_msg = otrl_message_receiving(irc->otr->us, &otr_ops, ic,
[5ebff60]	448	ic->acc->user, ic->acc->prpl->name, iu->bu->handle, msg, &newmsg,
	449	&tlvs, NULL, NULL, NULL);
[764c7d1]	450
[098a75b]	451	if (tlvs) {
	452	otrl_tlv_free(tlvs);
	453	}
	454
[5ebff60]	455	if (ignore_msg) {
[764c7d1]	456	/* this was an internal OTR protocol message */
	457	return NULL;
[5ebff60]	458	} else if (!newmsg) {
[764c7d1]	459	/* this was a non-OTR message */
[86fd261]	460	return otr_filter_colors(msg);
[764c7d1]	461	} else {
[da44b08]	462	/* we're done with the original msg, which will be caller-freed. */
[5d2bc9d]	463	return newmsg;
[764c7d1]	464	}
	465	}
	466
[934db064]	467	char otr_filter_msg_out(irc_user_t iu, char *msg, int flags)
[5ebff60]	468	{
[5a71d9c]	469	int st;
	470	char *otrmsg = NULL;
	471	ConnContext *ctx = NULL;
[934db064]	472	irc_t *irc = iu->irc;
	473	struct im_connection *ic = iu->bu->ic;
[329f9fe]	474	otrl_instag_t instag = OTRL_INSTAG_BEST; // XXX?
[5ebff60]	475
[329f9fe]	476	/* NB: in libotr 4.0.0 OTRL_INSTAG_RECENT will cause a null-pointer deref
	477	* in otrl_message_sending with newly-added OTR contexts.
	478	*/
[1dd3470]	479
	480	/* don't do OTR on certain (not classic IM) protocols, e.g. twitter */
[5ebff60]	481	if (ic->acc->prpl->options & OPT_NOOTR) {
[934db064]	482	return msg;
[1dd3470]	483	}
[1082395]	484
[0c85c08]	485	st = otrl_message_sending(irc->otr->us, &otr_ops, ic,
[5ebff60]	486	ic->acc->user, ic->acc->prpl->name, iu->bu->handle, instag,
	487	msg, NULL, &otrmsg, OTRL_FRAGMENT_SEND_ALL_BUT_LAST, &ctx, NULL, NULL);
[367ea3c]	488
[5ebff60]	489	if (otrmsg && otrmsg != msg) {
[367ea3c]	490	/* libotr wants us to replace our message */
	491	/* NB: caller will free old msg */
[098a75b]	492	msg = st ? NULL : g_strdup(otrmsg);
[367ea3c]	493	otrl_message_free(otrmsg);
[764c7d1]	494	}
[5ebff60]	495
	496	if (st) {
[367ea3c]	497	irc_usernotice(iu, "otr: error handling outgoing message: %d", st);
[5ebff60]	498	msg = NULL; /* do not send plaintext! */
[cc17b76]	499	}
[367ea3c]	500
	501	return msg;
[764c7d1]	502	}
	503
[0c85c08]	504	static const struct irc_plugin otr_plugin =
	505	{
	506	otr_irc_new,
	507	otr_irc_free,
[934db064]	508	otr_filter_msg_out,
	509	otr_filter_msg_in,
[2dcaf9a]	510	otr_load,
	511	otr_save,
	512	otr_remove,
[0c85c08]	513	};
	514
[8358691]	515	static void cmd_otr(irc_t irc, char *args)
[764c7d1]	516	{
	517	const command_t *cmd;
[5ebff60]	518
	519	if (!args[0]) {
[764c7d1]	520	return;
[5ebff60]	521	}
	522
	523	if (!args[1]) {
[764c7d1]	524	return;
[5ebff60]	525	}
	526
	527	for (cmd = otr_commands; cmd->command; cmd++) {
	528	if (strcmp(cmd->command, args[1]) == 0) {
[764c7d1]	529	break;
[5ebff60]	530	}
[764c7d1]	531	}
[5ebff60]	532
	533	if (!cmd->command) {
[e67e513]	534	irc_rootmsg(irc, "%s: unknown subcommand \"%s\", see \x02help otr\x02",
[5ebff60]	535	args[0], args[1]);
[764c7d1]	536	return;
	537	}
[5ebff60]	538
	539	if (!args[cmd->required_parameters + 1]) {
[e67e513]	540	irc_rootmsg(irc, "%s %s: not enough arguments (%d req.)",
[5ebff60]	541	args[0], args[1], cmd->required_parameters);
[764c7d1]	542	return;
	543	}
[5ebff60]	544
	545	cmd->execute(irc, args + 1);
[764c7d1]	546	}
	547
	548
	549	/* OTR "MessageAppOps" callbacks for global.otr_ui: */
	550
	551	OtrlPolicy op_policy(void opdata, ConnContext context)
	552	{
[e2b15bb]	553	struct im_connection *ic = check_imc(opdata, context->accountname, context->protocol);
[ad2d8bc]	554	irc_t *irc = ic->bee->ui_data;
[e2b15bb]	555	const char *p;
[5ebff60]	556
[dc9797f]	557	/* policy override during keygen: if we're missing the key for context but are currently
	558	generating it, then that's as much as we can do. => temporarily return NEVER. */
[5ebff60]	559	if (keygen_in_progress(irc, context->accountname, context->protocol) &&
	560	!otrl_privkey_find(irc->otr->us, context->accountname, context->protocol)) {
[dc9797f]	561	return OTRL_POLICY_NEVER;
[5ebff60]	562	}
[e2b15bb]	563
[ad2d8bc]	564	p = set_getstr(&ic->bee->set, "otr_policy");
[5ebff60]	565	if (!strcmp(p, "never")) {
[e2b15bb]	566	return OTRL_POLICY_NEVER;
[5ebff60]	567	}
	568	if (!strcmp(p, "opportunistic")) {
[e2b15bb]	569	return OTRL_POLICY_OPPORTUNISTIC;
[5ebff60]	570	}
	571	if (!strcmp(p, "manual")) {
[e2b15bb]	572	return OTRL_POLICY_MANUAL;
[5ebff60]	573	}
	574	if (!strcmp(p, "always")) {
[e2b15bb]	575	return OTRL_POLICY_ALWAYS;
[5ebff60]	576	}
	577
[764c7d1]	578	return OTRL_POLICY_OPPORTUNISTIC;
	579	}
	580
	581	void op_create_privkey(void opdata, const char accountname,
[5ebff60]	582	const char *protocol)
[764c7d1]	583	{
	584	struct im_connection *ic = check_imc(opdata, accountname, protocol);
[ad2d8bc]	585	irc_t *irc = ic->bee->ui_data;
[5ebff60]	586
[dc9797f]	587	/* will fail silently if keygen already in progress */
[ad2d8bc]	588	otr_keygen(irc, accountname, protocol);
[764c7d1]	589	}
	590
	591	int op_is_logged_in(void opdata, const char accountname,
[5ebff60]	592	const char protocol, const char recipient)
[764c7d1]	593	{
	594	struct im_connection *ic = check_imc(opdata, accountname, protocol);
[ad2d8bc]	595	bee_user_t *bu;
[764c7d1]	596
[ad2d8bc]	597	/* lookup the irc_user_t for the given recipient */
	598	bu = bee_user_by_handle(ic->bee, ic, recipient);
[5ebff60]	599	if (bu) {
	600	if (bu->flags & BEE_USER_ONLINE) {
[764c7d1]	601	return 1;
[5ebff60]	602	} else {
[764c7d1]	603	return 0;
[5ebff60]	604	}
[764c7d1]	605	} else {
	606	return -1;
	607	}
	608	}
	609
	610	void op_inject_message(void opdata, const char accountname,
[5ebff60]	611	const char protocol, const char recipient, const char *message)
[764c7d1]	612	{
	613	struct im_connection *ic = check_imc(opdata, accountname, protocol);
[ad2d8bc]	614	irc_t *irc = ic->bee->ui_data;
[764c7d1]	615
	616	if (strcmp(accountname, recipient) == 0) {
	617	/* huh? injecting messages to myself? */
[e67e513]	618	irc_rootmsg(irc, "note to self: %s", message);
[764c7d1]	619	} else {
	620	/* need to drop some consts here :-( */
	621	/* TODO: get flags into op_inject_message?! */
[5ebff60]	622	ic->acc->prpl->buddy_msg(ic, (char ) recipient, (char ) message, 0);
[764c7d1]	623	/* ignoring return value :-/ */
	624	}
	625	}
	626
	627	void op_new_fingerprint(void *opdata, OtrlUserState us,
[5ebff60]	628	const char accountname, const char protocol,
	629	const char *username, unsigned char fingerprint[20])
[764c7d1]	630	{
	631	struct im_connection *ic = check_imc(opdata, accountname, protocol);
[ad2d8bc]	632	irc_t *irc = ic->bee->ui_data;
[409c2de]	633	irc_user_t *u = peeruser(irc, username, protocol);
[5ebff60]	634	char hunam[45]; /* anybody looking? ;-) */
	635
[764c7d1]	636	otrl_privkey_hash_to_human(hunam, fingerprint);
[5ebff60]	637	if (u) {
[409c2de]	638	irc_usernotice(u, "new fingerprint: %s", hunam);
	639	} else {
	640	/* this case shouldn't normally happen */
	641	irc_rootmsg(irc, "new fingerprint for %s/%s: %s",
[5ebff60]	642	username, protocol, hunam);
[409c2de]	643	}
[764c7d1]	644	}
	645
	646	void op_write_fingerprints(void *opdata)
	647	{
[5ebff60]	648	struct im_connection ic = (struct im_connection ) opdata;
[ad2d8bc]	649	irc_t *irc = ic->bee->ui_data;
[764c7d1]	650
[ad2d8bc]	651	otr_save(irc);
[764c7d1]	652	}
	653
	654	void op_gone_secure(void opdata, ConnContext context)
	655	{
	656	struct im_connection *ic =
[5ebff60]	657	check_imc(opdata, context->accountname, context->protocol);
[ad2d8bc]	658	irc_user_t *u;
	659	irc_t *irc = ic->bee->ui_data;
[764c7d1]	660
[ad2d8bc]	661	u = peeruser(irc, context->username, context->protocol);
[5ebff60]	662	if (!u) {
[5a71d9c]	663	log_message(LOGLVL_ERROR,
[5ebff60]	664	"BUG: otr.c: op_gone_secure: irc_user_t for %s/%s/%s not found!",
	665	context->username, context->protocol, context->accountname);
[5a71d9c]	666	return;
	667	}
[5ebff60]	668
[a0c6fc5]	669	otr_update_uflags(context, u);
[5ebff60]	670	if (!otr_update_modeflags(irc, u)) {
[f1cf01c]	671	char *trust = u->flags & IRC_USER_OTR_TRUSTED ? "trusted" : "untrusted!";
[409c2de]	672	irc_usernotice(u, "conversation is now off the record (%s)", trust);
[f1cf01c]	673	}
[764c7d1]	674	}
	675
	676	void op_gone_insecure(void opdata, ConnContext context)
	677	{
	678	struct im_connection *ic =
[5ebff60]	679	check_imc(opdata, context->accountname, context->protocol);
[ad2d8bc]	680	irc_t *irc = ic->bee->ui_data;
	681	irc_user_t *u;
[764c7d1]	682
[ad2d8bc]	683	u = peeruser(irc, context->username, context->protocol);
[5ebff60]	684	if (!u) {
[5a71d9c]	685	log_message(LOGLVL_ERROR,
[5ebff60]	686	"BUG: otr.c: op_gone_insecure: irc_user_t for %s/%s/%s not found!",
	687	context->username, context->protocol, context->accountname);
[5a71d9c]	688	return;
	689	}
[a0c6fc5]	690	otr_update_uflags(context, u);
[5ebff60]	691	if (!otr_update_modeflags(irc, u)) {
[409c2de]	692	irc_usernotice(u, "conversation is now in cleartext");
[5ebff60]	693	}
[764c7d1]	694	}
	695
	696	void op_still_secure(void opdata, ConnContext context, int is_reply)
	697	{
	698	struct im_connection *ic =
[5ebff60]	699	check_imc(opdata, context->accountname, context->protocol);
[ad2d8bc]	700	irc_t *irc = ic->bee->ui_data;
	701	irc_user_t *u;
[764c7d1]	702
[ad2d8bc]	703	u = peeruser(irc, context->username, context->protocol);
[5ebff60]	704	if (!u) {
[5a71d9c]	705	log_message(LOGLVL_ERROR,
[5ebff60]	706	"BUG: otr.c: op_still_secure: irc_user_t for %s/%s/%s not found!",
	707	context->username, context->protocol, context->accountname);
[5a71d9c]	708	return;
	709	}
[a0c6fc5]	710
	711	otr_update_uflags(context, u);
[5ebff60]	712	if (!otr_update_modeflags(irc, u)) {
[f1cf01c]	713	char *trust = u->flags & IRC_USER_OTR_TRUSTED ? "trusted" : "untrusted!";
[409c2de]	714	irc_usernotice(u, "otr connection has been refreshed (%s)", trust);
[f1cf01c]	715	}
[764c7d1]	716	}
	717
[a13855a]	718	int op_max_message_size(void opdata, ConnContext context)
	719	{
[5a71d9c]	720	struct im_connection *ic =
[5ebff60]	721	check_imc(opdata, context->accountname, context->protocol);
	722
[5a71d9c]	723	return ic->acc->prpl->mms;
[a13855a]	724	}
	725
	726	const char op_account_name(void opdata, const char account, const char protocol)
	727	{
[5ebff60]	728	struct im_connection ic = (struct im_connection ) opdata;
[ad2d8bc]	729	irc_t *irc = ic->bee->ui_data;
[a13855a]	730
[ad2d8bc]	731	return peernick(irc, account, protocol);
[a13855a]	732	}
	733
[e65039a]	734	void op_create_instag(void opdata, const char account, const char *protocol)
	735	{
	736	struct im_connection *ic =
[5ebff60]	737	check_imc(opdata, account, protocol);
[e65039a]	738	irc_t *irc = ic->bee->ui_data;
	739	gcry_error_t e;
	740	char s[512];
[5ebff60]	741
[e65039a]	742	g_snprintf(s, 511, "%s%s.otr_instags", global.conf->configdir,
[5ebff60]	743	irc->user->nick);
[e65039a]	744	e = otrl_instag_generate(irc->otr->us, s, account, protocol);
[5ebff60]	745	if (e) {
[e65039a]	746	irc_rootmsg(irc, "otr: %s/%s: otrl_instag_generate failed: %s",
[5ebff60]	747	account, protocol, gcry_strerror(e));
[e65039a]	748	}
	749	}
	750
[86fd261]	751	static char otr_filter_colors(char msg) {
	752	int i;
	753	for (i = 0; msg[i]; i++) {
	754	if (msg[i] == '\x03') {
	755	msg[i] = '?';
	756	}
	757	}
	758	return msg;
	759	}
	760
[654112d4]	761	/* returns newly allocated string */
	762	static char otr_color_encrypted(char msg, char *color, gboolean is_query) {
	763	char **lines;
	764	GString *out;
	765	int i;
	766
	767	lines = g_strsplit(msg, "\n", -1);
	768
	769	/* up to 4 extra chars per line (e.g., '\x03' + ("03"\|"05") + ' ') */
	770	out = g_string_sized_new(strlen(msg) + g_strv_length(lines) * 4);
	771
	772	for (i = 0; lines[i]; i++) {
	773	char *line = lines[i];
	774
	775	if (i != 0) {
	776	g_string_append_c(out, '\n');
	777
	778	} else if (is_query && g_strncasecmp(line, "/me ", 4) == 0) {
	779	/* in a query window, keep "/me " uncolored at the beginning */
	780	line += 4;
	781	g_string_append(out, "/me ");
	782	}
	783
	784	g_string_append_c(out, '\x03');
	785	g_string_append(out, color);
	786
	787	/* comma in first place could mess with the color code */
	788	if (line[0] == ',') {
	789	/* insert a space between color spec and message */
	790	g_string_append_c(out, ' ');
	791	}
	792
[86fd261]	793	g_string_append(out, otr_filter_colors(line));
[654112d4]	794	}
	795
	796	g_strfreev(lines);
	797
	798	return g_string_free(out, FALSE);
	799	}
	800
[5d2bc9d]	801	void op_convert_msg(void opdata, ConnContext ctx, OtrlConvertType typ,
[5ebff60]	802	char *dst, const char src)
[5d2bc9d]	803	{
	804	struct im_connection *ic =
[5ebff60]	805	check_imc(opdata, ctx->accountname, ctx->protocol);
[5d2bc9d]	806	irc_t *irc = ic->bee->ui_data;
	807	irc_user_t *iu = peeruser(irc, ctx->username, ctx->protocol);
	808
[5ebff60]	809	if (typ == OTRL_CONVERT_RECEIVING) {
[5d2bc9d]	810	char *msg = g_strdup(src);
	811
	812	/* HTML decoding */
[5ebff60]	813	if (set_getbool(&ic->bee->set, "otr_does_html") &&
	814	!(ic->flags & OPT_DOES_HTML) &&
	815	set_getbool(&ic->bee->set, "strip_html")) {
[5d2bc9d]	816	strip_html(msg);
[654112d4]	817
	818	/* msg is borrowed by dst (unless the next if decides to color it) /
[5d2bc9d]	819	*dst = msg;
	820	}
	821
	822	/* coloring */
[5ebff60]	823	if (set_getbool(&ic->bee->set, "otr_color_encrypted")) {
[5d2bc9d]	824	const char *trust = ctx->active_fingerprint->trust;
[654112d4]	825	char color = (trust && trust) ? OTR_COLOR_TRUSTED : OTR_COLOR_UNTRUSTED;
	826	gboolean is_query = (irc_user_msgdest(iu) == irc->user->nick);
[5d2bc9d]	827
[654112d4]	828	/* the return value of otr_color_encrypted() is borrowed by dst /
	829	*dst = otr_color_encrypted(msg, color, is_query);
[5d2bc9d]	830
[654112d4]	831	/* this branch doesn't need msg */
	832	g_free(msg);
[5d2bc9d]	833	}
	834	} else {
	835	/* HTML encoding */
	836	/* consider OTR plaintext to be HTML if otr_does_html is set */
[5ebff60]	837	if (ctx && ctx->msgstate == OTRL_MSGSTATE_ENCRYPTED &&
	838	set_getbool(&ic->bee->set, "otr_does_html") &&
	839	(g_strncasecmp(src, "<html>", 6) != 0)) {
[5d2bc9d]	840	*dst = escape_html(src);
	841	}
	842	}
	843	}
	844
	845	void op_convert_free(void opdata, ConnContext ctx, char *msg)
	846	{
	847	g_free(msg);
	848	}
[5ebff60]	849
[352a6b0]	850	/* Socialist Millionaires' Protocol */
	851	void op_handle_smp_event(void opdata, OtrlSMPEvent ev, ConnContext ctx,
[5ebff60]	852	unsigned short percent, char *question)
[352a6b0]	853	{
	854	struct im_connection *ic =
[5ebff60]	855	check_imc(opdata, ctx->accountname, ctx->protocol);
[352a6b0]	856	irc_t *irc = ic->bee->ui_data;
	857	OtrlUserState us = irc->otr->us;
	858	irc_user_t *u = peeruser(irc, ctx->username, ctx->protocol);
	859
[5ebff60]	860	if (!u) {
	861	return;
	862	}
[352a6b0]	863
[5ebff60]	864	switch (ev) {
[352a6b0]	865	case OTRL_SMPEVENT_ASK_FOR_SECRET:
	866	irc_rootmsg(irc, "smp: initiated by %s"
[5ebff60]	867	" - respond with \x02otr smp %s <secret>\x02",
	868	u->nick, u->nick);
[352a6b0]	869	break;
	870	case OTRL_SMPEVENT_ASK_FOR_ANSWER:
	871	irc_rootmsg(irc, "smp: initiated by %s with question: \x02\"%s\"\x02", u->nick,
[5ebff60]	872	question);
[352a6b0]	873	irc_rootmsg(irc, "smp: respond with \x02otr smp %s <answer>\x02",
[5ebff60]	874	u->nick);
[352a6b0]	875	break;
	876	case OTRL_SMPEVENT_CHEATED:
	877	irc_rootmsg(irc, "smp %s: opponent violated protocol, aborting",
[5ebff60]	878	u->nick);
[352a6b0]	879	otrl_message_abort_smp(us, &otr_ops, u->bu->ic, ctx);
	880	otrl_sm_state_free(ctx->smstate);
	881	break;
	882	case OTRL_SMPEVENT_NONE:
	883	break;
	884	case OTRL_SMPEVENT_IN_PROGRESS:
	885	break;
	886	case OTRL_SMPEVENT_SUCCESS:
[5ebff60]	887	if (ctx->smstate->received_question) {
[352a6b0]	888	irc_rootmsg(irc, "smp %s: correct answer, you are trusted",
[5ebff60]	889	u->nick);
[352a6b0]	890	} else {
	891	irc_rootmsg(irc, "smp %s: secrets proved equal, fingerprint trusted",
[5ebff60]	892	u->nick);
[352a6b0]	893	}
	894	otrl_sm_state_free(ctx->smstate);
	895	break;
	896	case OTRL_SMPEVENT_FAILURE:
[5ebff60]	897	if (ctx->smstate->received_question) {
[352a6b0]	898	irc_rootmsg(irc, "smp %s: wrong answer, you are not trusted",
[5ebff60]	899	u->nick);
[352a6b0]	900	} else {
	901	irc_rootmsg(irc, "smp %s: secrets did not match, fingerprint not trusted",
[5ebff60]	902	u->nick);
[352a6b0]	903	}
	904	otrl_sm_state_free(ctx->smstate);
	905	break;
	906	case OTRL_SMPEVENT_ABORT:
[5ebff60]	907	irc_rootmsg(irc, "smp: received abort from %s", u->nick);
[352a6b0]	908	otrl_sm_state_free(ctx->smstate);
	909	break;
	910	case OTRL_SMPEVENT_ERROR:
	911	irc_rootmsg(irc, "smp %s: protocol error, aborting",
[5ebff60]	912	u->nick);
[352a6b0]	913	otrl_message_abort_smp(us, &otr_ops, u->bu->ic, ctx);
	914	otrl_sm_state_free(ctx->smstate);
	915	break;
	916	}
	917	}
	918
[090c9b7]	919	void op_handle_msg_event(void opdata, OtrlMessageEvent ev, ConnContext ctx,
[5ebff60]	920	const char *message, gcry_error_t err)
[090c9b7]	921	{
[5ebff60]	922	switch (ev) {
[090c9b7]	923	case OTRL_MSGEVENT_ENCRYPTION_REQUIRED:
	924	display_otr_message(opdata, ctx,
[5ebff60]	925	"policy requires encryption - message not sent");
[090c9b7]	926	break;
	927	case OTRL_MSGEVENT_ENCRYPTION_ERROR:
	928	display_otr_message(opdata, ctx,
[5ebff60]	929	"error during encryption - message not sent");
[090c9b7]	930	break;
	931	case OTRL_MSGEVENT_CONNECTION_ENDED:
	932	display_otr_message(opdata, ctx,
[5ebff60]	933	"other end has disconnected OTR - "
	934	"close connection or reconnect!");
[090c9b7]	935	break;
	936	case OTRL_MSGEVENT_SETUP_ERROR:
	937	display_otr_message(opdata, ctx,
[5ebff60]	938	"OTR connection failed: %s", gcry_strerror(err));
[090c9b7]	939	break;
	940	case OTRL_MSGEVENT_MSG_REFLECTED:
	941	display_otr_message(opdata, ctx,
[5ebff60]	942	"received our own OTR message (!?)");
[090c9b7]	943	break;
	944	case OTRL_MSGEVENT_MSG_RESENT:
	945	display_otr_message(opdata, ctx,
[5ebff60]	946	"the previous message was resent");
[090c9b7]	947	break;
	948	case OTRL_MSGEVENT_RCVDMSG_NOT_IN_PRIVATE:
	949	display_otr_message(opdata, ctx,
[5ebff60]	950	"unexpected encrypted message received");
[090c9b7]	951	break;
	952	case OTRL_MSGEVENT_RCVDMSG_UNREADABLE:
	953	display_otr_message(opdata, ctx,
[5ebff60]	954	"unreadable encrypted message received");
[090c9b7]	955	break;
	956	case OTRL_MSGEVENT_RCVDMSG_MALFORMED:
	957	display_otr_message(opdata, ctx,
[5ebff60]	958	"malformed OTR message received");
[090c9b7]	959	break;
[51f937e]	960	case OTRL_MSGEVENT_LOG_HEARTBEAT_RCVD:
[5ebff60]	961	if (global.conf->verbose) {
[51f937e]	962	log_otr_message(opdata, "%s/%s: heartbeat received",
[5ebff60]	963	ctx->accountname, ctx->protocol);
[51f937e]	964	}
	965	break;
	966	case OTRL_MSGEVENT_LOG_HEARTBEAT_SENT:
[5ebff60]	967	if (global.conf->verbose) {
[51f937e]	968	log_otr_message(opdata, "%s/%s: heartbeat sent",
[5ebff60]	969	ctx->accountname, ctx->protocol);
[51f937e]	970	}
	971	break;
[090c9b7]	972	case OTRL_MSGEVENT_RCVDMSG_GENERAL_ERR:
	973	display_otr_message(opdata, ctx,
[5ebff60]	974	"OTR error message received: %s", message);
[090c9b7]	975	break;
	976	case OTRL_MSGEVENT_RCVDMSG_UNENCRYPTED:
	977	display_otr_message(opdata, ctx,
[5ebff60]	978	"unencrypted message received: %s", message);
[090c9b7]	979	break;
	980	case OTRL_MSGEVENT_RCVDMSG_UNRECOGNIZED:
	981	display_otr_message(opdata, ctx,
[5ebff60]	982	"unrecognized OTR message received");
[090c9b7]	983	break;
[e4752a6]	984	case OTRL_MSGEVENT_RCVDMSG_FOR_OTHER_INSTANCE:
	985	display_otr_message(opdata, ctx,
[5ebff60]	986	"OTR message for a different instance received");
[e4752a6]	987	break;
[090c9b7]	988	default:
[51f937e]	989	/* shouldn't happen */
[090c9b7]	990	break;
	991	}
	992	}
	993
[6d9f0ba]	994	const char op_otr_error_message(void opdata, ConnContext *ctx,
[5ebff60]	995	OtrlErrorCode err_code)
[6d9f0ba]	996	{
[5ebff60]	997	switch (err_code) {
[6d9f0ba]	998	case OTRL_ERRCODE_ENCRYPTION_ERROR:
	999	return "i failed to encrypt a message";
	1000	case OTRL_ERRCODE_MSG_NOT_IN_PRIVATE:
	1001	return "you sent an encrypted message i didn't expect";
	1002	case OTRL_ERRCODE_MSG_UNREADABLE:
	1003	return "could not read encrypted message";
	1004	case OTRL_ERRCODE_MSG_MALFORMED:
	1005	return "you sent a malformed OTR message";
	1006	default:
	1007	return "i suffered an unexpected OTR error";
	1008	}
	1009	}
	1010
[5d2bc9d]	1011
[764c7d1]	1012
	1013	/* OTR sub-command handlers */
	1014
[69ef042]	1015	void cmd_otr_reconnect(irc_t irc, char *args)
	1016	{
	1017	cmd_otr_disconnect(irc, args);
	1018	cmd_otr_connect(irc, args);
	1019	}
	1020
[8521b02]	1021	void cmd_otr_disconnect(irc_t irc, char *args)
[764c7d1]	1022	{
[ad2d8bc]	1023	irc_user_t *u;
[764c7d1]	1024
[5ebff60]	1025	if (!strcmp("*", args[1])) {
[c239fff]	1026	otr_disconnect_all(irc);
	1027	irc_rootmsg(irc, "all conversations are now in cleartext");
	1028	} else {
	1029	u = irc_user_by_name(irc, args[1]);
[5ebff60]	1030	if (otr_disconnect_user(irc, u)) {
[c239fff]	1031	irc_usernotice(u, "conversation is now in cleartext");
[5ebff60]	1032	} else {
[c239fff]	1033	irc_rootmsg(irc, "%s: unknown user", args[1]);
[5ebff60]	1034	}
[c595308]	1035	}
[764c7d1]	1036	}
	1037
[8521b02]	1038	void cmd_otr_connect(irc_t irc, char *args)
[764c7d1]	1039	{
[ad2d8bc]	1040	irc_user_t *u;
[820a2a7]	1041	char msg, query = "?OTR?";
[764c7d1]	1042
[ad2d8bc]	1043	u = irc_user_by_name(irc, args[1]);
[5ebff60]	1044	if (!u \|\| !u->bu \|\| !u->bu->ic) {
[e67e513]	1045	irc_rootmsg(irc, "%s: unknown user", args[1]);
[764c7d1]	1046	return;
	1047	}
[5ebff60]	1048	if (!(u->bu->flags & BEE_USER_ONLINE)) {
[e67e513]	1049	irc_rootmsg(irc, "%s is offline", args[1]);
[764c7d1]	1050	return;
	1051	}
[5ebff60]	1052
[fbcb481]	1053	/* passing this through the filter so it goes through libotr which
	1054	* will replace the simple query string with a proper one */
[820a2a7]	1055	msg = otr_filter_msg_out(u, query, 0);
	1056
	1057	/* send the message */
[5ebff60]	1058	if (msg) {
[820a2a7]	1059	u->bu->ic->acc->prpl->buddy_msg(u->bu->ic, u->bu->handle, msg, 0); /* XXX flags? */
	1060	/* XXX error message? */
	1061
[5ebff60]	1062	if (msg != query) {
[820a2a7]	1063	g_free(msg);
[5ebff60]	1064	}
[820a2a7]	1065	}
[764c7d1]	1066	}
	1067
[5a71d9c]	1068	void cmd_otr_smp(irc_t irc, char *args)
[764c7d1]	1069	{
[5ebff60]	1070	otr_smp_or_smpq(irc, args[1], NULL, args[2]); /* no question */
[99a01b9]	1071	}
[764c7d1]	1072
[99a01b9]	1073	void cmd_otr_smpq(irc_t irc, char *args)
	1074	{
[7c91392]	1075	otr_smp_or_smpq(irc, args[1], args[2], args[3]);
[764c7d1]	1076	}
	1077
[5a71d9c]	1078	void cmd_otr_trust(irc_t irc, char *args)
	1079	{
[ad2d8bc]	1080	irc_user_t *u;
[5a71d9c]	1081	ConnContext *ctx;
	1082	unsigned char raw[20];
	1083	Fingerprint *fp;
[5ebff60]	1084	int i, j;
	1085
[ad2d8bc]	1086	u = irc_user_by_name(irc, args[1]);
[5ebff60]	1087	if (!u \|\| !u->bu \|\| !u->bu->ic) {
[e67e513]	1088	irc_rootmsg(irc, "%s: unknown user", args[1]);
[5a71d9c]	1089	return;
	1090	}
[5ebff60]	1091
[ad2d8bc]	1092	ctx = otrl_context_find(irc->otr->us, u->bu->handle,
[5ebff60]	1093	u->bu->ic->acc->user, u->bu->ic->acc->prpl->name, OTRL_INSTAG_MASTER, 0, NULL, NULL,
	1094	NULL);
	1095	if (!ctx) {
[e67e513]	1096	irc_rootmsg(irc, "%s: no otr context with user", args[1]);
[5a71d9c]	1097	return;
	1098	}
[5ebff60]	1099
[5a71d9c]	1100	/* convert given fingerprint to raw representation */
[5ebff60]	1101	for (i = 0; i < 5; i++) {
	1102	for (j = 0; j < 4; j++) {
	1103	char p = args[2 + i] + (2 j);
	1104	char *q = p + 1;
[5a71d9c]	1105	int x, y;
[5ebff60]	1106
	1107	if (!p \|\| !q) {
	1108	irc_rootmsg(irc, "failed: truncated fingerprint block %d", i + 1);
[5a71d9c]	1109	return;
	1110	}
[5ebff60]	1111
[5a71d9c]	1112	x = hexval(*p);
	1113	y = hexval(*q);
[5ebff60]	1114	if (x < 0) {
	1115	irc_rootmsg(irc, "failed: %d. hex digit of block %d out of range", 2 * j + 1, i + 1);
[5a71d9c]	1116	return;
	1117	}
[5ebff60]	1118	if (y < 0) {
	1119	irc_rootmsg(irc, "failed: %d. hex digit of block %d out of range", 2 * j + 2, i + 1);
[5a71d9c]	1120	return;
	1121	}
	1122
[5ebff60]	1123	raw[i * 4 + j] = x * 16 + y;
[5a71d9c]	1124	}
	1125	}
	1126	fp = otrl_context_find_fingerprint(ctx, raw, 0, NULL);
[5ebff60]	1127	if (!fp) {
[e67e513]	1128	irc_rootmsg(irc, "failed: no such fingerprint for %s", args[1]);
[5a71d9c]	1129	} else {
	1130	char *trust = args[7] ? args[7] : "affirmed";
	1131	otrl_context_set_trust(fp, trust);
[e67e513]	1132	irc_rootmsg(irc, "fingerprint match, trust set to \"%s\"", trust);
[5ebff60]	1133	if (u->flags & IRC_USER_OTR_ENCRYPTED) {
[ad2d8bc]	1134	u->flags \|= IRC_USER_OTR_TRUSTED;
[5ebff60]	1135	}
[5a71d9c]	1136	otr_update_modeflags(irc, u);
	1137	}
	1138	}
	1139
[8521b02]	1140	void cmd_otr_info(irc_t irc, char *args)
[764c7d1]	1141	{
[5ebff60]	1142	if (!args[1]) {
[8521b02]	1143	show_general_otr_info(irc);
[764c7d1]	1144	} else {
[8521b02]	1145	char *arg = g_strdup(args[1]);
[5ebff60]	1146	char myhandle, handle = NULL, *protocol;
[2c81d15]	1147	ConnContext bestctx = NULL, ctx;
[5ebff60]	1148
[8521b02]	1149	/* interpret arg as 'user/protocol/account' if possible */
	1150	protocol = strchr(arg, '/');
[9e64011]	1151	myhandle = NULL;
[5ebff60]	1152	if (protocol) {
[8521b02]	1153	*(protocol++) = '\0';
	1154	myhandle = strchr(protocol, '/');
[764c7d1]	1155	}
[5ebff60]	1156	if (protocol && myhandle) {
[8521b02]	1157	*(myhandle++) = '\0';
	1158	handle = arg;
[5ebff60]	1159	ctx = otrl_context_find(irc->otr->us, handle, myhandle, protocol, OTRL_INSTAG_MASTER, 0, NULL,
	1160	NULL, NULL);
	1161	if (!ctx) {
[e67e513]	1162	irc_rootmsg(irc, "no such context");
[8521b02]	1163	g_free(arg);
	1164	return;
	1165	}
[764c7d1]	1166	} else {
[ad2d8bc]	1167	irc_user_t *u = irc_user_by_name(irc, args[1]);
[5ebff60]	1168	if (!u \|\| !u->bu \|\| !u->bu->ic) {
[e67e513]	1169	irc_rootmsg(irc, "%s: unknown user", args[1]);
[8521b02]	1170	g_free(arg);
	1171	return;
[5a71d9c]	1172	}
[ad2d8bc]	1173	ctx = otrl_context_find(irc->otr->us, u->bu->handle, u->bu->ic->acc->user,
[5ebff60]	1174	u->bu->ic->acc->prpl->name, OTRL_INSTAG_MASTER, 0, NULL, NULL, NULL);
	1175	if (!ctx) {
[e67e513]	1176	irc_rootmsg(irc, "no otr context with %s", args[1]);
[8521b02]	1177	g_free(arg);
	1178	return;
	1179	}
[2c81d15]	1180	/* This does no harm if it returns NULL */
	1181	bestctx = otrl_context_find(irc->otr->us, u->bu->handle, u->bu->ic->acc->user,
	1182	u->bu->ic->acc->prpl->name, OTRL_INSTAG_BEST, 0, NULL, NULL, NULL);
[8521b02]	1183	}
[5ebff60]	1184
[8521b02]	1185	/* show how we resolved the (nick) argument, if we did */
[5ebff60]	1186	if (handle != arg) {
[2c81d15]	1187	irc_rootmsg(irc, "%s:", args[1]);
	1188	irc_rootmsg(irc, " they are: %s/%s", ctx->username, ctx->protocol);
	1189	irc_rootmsg(irc, " we are: %s/%s", ctx->accountname, ctx->protocol);
[764c7d1]	1190	}
[2c81d15]	1191	show_otr_context_info(irc, ctx, bestctx);
[8521b02]	1192	g_free(arg);
[764c7d1]	1193	}
	1194	}
	1195
[94e7eb3]	1196	void cmd_otr_keygen(irc_t irc, char *args)
	1197	{
	1198	account_t *a;
[5ebff60]	1199
[eabe6d4]	1200	if ((a = account_get(irc->b, args[1])) == NULL) {
	1201	irc_rootmsg(irc, "Could not find account `%s'.", args[1]);
[94e7eb3]	1202	return;
	1203	}
[5ebff60]	1204
	1205	if (keygen_in_progress(irc, a->user, a->prpl->name)) {
[eabe6d4]	1206	irc_rootmsg(irc, "keygen for account `%s' already in progress", a->tag);
[dc9797f]	1207	return;
	1208	}
[5ebff60]	1209
	1210	if (otrl_privkey_find(irc->otr->us, a->user, a->prpl->name)) {
[eabe6d4]	1211	char *s = g_strdup_printf("account `%s' already has a key, replace it?", a->tag);
[ad2d8bc]	1212	query_add(irc, NULL, s, yes_keygen, NULL, NULL, a);
[82e8fe8]	1213	g_free(s);
[94e7eb3]	1214	} else {
	1215	otr_keygen(irc, a->user, a->prpl->name);
	1216	}
	1217	}
	1218
[6738a67]	1219	void yes_forget_fingerprint(void *data)
[c595308]	1220	{
[5ebff60]	1221	pair_t p = (pair_t ) data;
	1222	irc_t irc = (irc_t ) p->fst;
	1223	Fingerprint fp = (Fingerprint ) p->snd;
[6738a67]	1224
	1225	g_free(p);
[5ebff60]	1226
	1227	if (fp == fp->context->active_fingerprint) {
[e67e513]	1228	irc_rootmsg(irc, "that fingerprint is active, terminate otr connection first");
[c595308]	1229	return;
	1230	}
[5ebff60]	1231
[c595308]	1232	otrl_context_forget_fingerprint(fp, 0);
	1233	}
	1234
[6738a67]	1235	void yes_forget_context(void *data)
[c595308]	1236	{
[5ebff60]	1237	pair_t p = (pair_t ) data;
	1238	irc_t irc = (irc_t ) p->fst;
	1239	ConnContext ctx = (ConnContext ) p->snd;
[6738a67]	1240
	1241	g_free(p);
[f93e01c]	1242
	1243	// XXX forget all contexts
[5ebff60]	1244
	1245	if (ctx->msgstate == OTRL_MSGSTATE_ENCRYPTED) {
[e67e513]	1246	irc_rootmsg(irc, "active otr connection with %s, terminate it first",
[5ebff60]	1247	peernick(irc, ctx->username, ctx->protocol));
[c595308]	1248	return;
	1249	}
[5ebff60]	1250
	1251	if (ctx->msgstate == OTRL_MSGSTATE_FINISHED) {
[c595308]	1252	otrl_context_force_plaintext(ctx);
[5ebff60]	1253	}
[c595308]	1254	otrl_context_forget(ctx);
	1255	}
	1256
[6738a67]	1257	void yes_forget_key(void *data)
[d0faf62]	1258	{
[5ebff60]	1259	OtrlPrivKey key = (OtrlPrivKey ) data;
	1260
[d0faf62]	1261	otrl_privkey_forget(key);
[37bff51]	1262	/* Hm, libotr doesn't seem to offer a function for explicitly /writing/
	1263	keyfiles. So the key will be back on the next load... */
	1264	/* TODO: Actually erase forgotten keys from storage? */
[d0faf62]	1265	}
	1266
[c595308]	1267	void cmd_otr_forget(irc_t irc, char *args)
	1268	{
[5ebff60]	1269	if (!strcmp(args[1], "fingerprint")) {
[ad2d8bc]	1270	irc_user_t *u;
[c595308]	1271	ConnContext *ctx;
	1272	Fingerprint *fp;
	1273	char human[54];
	1274	char *s;
[6738a67]	1275	pair_t *p;
[5ebff60]	1276
	1277	if (!args[3]) {
[e67e513]	1278	irc_rootmsg(irc, "otr %s %s: not enough arguments (2 req.)", args[0], args[1]);
[c595308]	1279	return;
	1280	}
[5ebff60]	1281
[e2b15bb]	1282	/* TODO: allow context specs ("user/proto/account") in 'otr forget fingerprint'? */
[ad2d8bc]	1283	u = irc_user_by_name(irc, args[2]);
[5ebff60]	1284	if (!u \|\| !u->bu \|\| !u->bu->ic) {
[e67e513]	1285	irc_rootmsg(irc, "%s: unknown user", args[2]);
[c595308]	1286	return;
	1287	}
[5ebff60]	1288
[ad2d8bc]	1289	ctx = otrl_context_find(irc->otr->us, u->bu->handle, u->bu->ic->acc->user,
[5ebff60]	1290	u->bu->ic->acc->prpl->name, OTRL_INSTAG_MASTER, 0, NULL, NULL, NULL);
	1291	if (!ctx) {
[e67e513]	1292	irc_rootmsg(irc, "no otr context with %s", args[2]);
[c595308]	1293	return;
	1294	}
[5ebff60]	1295
	1296	fp = match_fingerprint(irc, ctx, ((const char **) args) + 3);
	1297	if (!fp) {
[c595308]	1298	/* match_fingerprint does error messages */
	1299	return;
	1300	}
[5ebff60]	1301
	1302	if (fp == ctx->active_fingerprint) {
[e67e513]	1303	irc_rootmsg(irc, "that fingerprint is active, terminate otr connection first");
[c595308]	1304	return;
	1305	}
[5ebff60]	1306
[c595308]	1307	otrl_privkey_hash_to_human(human, fp->fingerprint);
	1308	s = g_strdup_printf("about to forget fingerprint %s, are you sure?", human);
[6738a67]	1309	p = g_malloc(sizeof(pair_t));
[5ebff60]	1310	if (!p) {
[6738a67]	1311	return;
[5ebff60]	1312	}
[6738a67]	1313	p->fst = irc;
	1314	p->snd = fp;
[ad2d8bc]	1315	query_add(irc, NULL, s, yes_forget_fingerprint, NULL, NULL, p);
[82e8fe8]	1316	g_free(s);
[5ebff60]	1317	} else if (!strcmp(args[1], "context")) {
[ad2d8bc]	1318	irc_user_t *u;
[c595308]	1319	ConnContext *ctx;
	1320	char *s;
[6738a67]	1321	pair_t *p;
[5ebff60]	1322
[e2b15bb]	1323	/* TODO: allow context specs ("user/proto/account") in 'otr forget contex'? */
[ad2d8bc]	1324	u = irc_user_by_name(irc, args[2]);
[5ebff60]	1325	if (!u \|\| !u->bu \|\| !u->bu->ic) {
[e67e513]	1326	irc_rootmsg(irc, "%s: unknown user", args[2]);
[c595308]	1327	return;
	1328	}
[5ebff60]	1329
[ad2d8bc]	1330	ctx = otrl_context_find(irc->otr->us, u->bu->handle, u->bu->ic->acc->user,
[5ebff60]	1331	u->bu->ic->acc->prpl->name, OTRL_INSTAG_MASTER, 0, NULL, NULL, NULL);
	1332	if (!ctx) {
[e67e513]	1333	irc_rootmsg(irc, "no otr context with %s", args[2]);
[c595308]	1334	return;
	1335	}
[5ebff60]	1336
	1337	if (ctx->msgstate == OTRL_MSGSTATE_ENCRYPTED) {
[e67e513]	1338	irc_rootmsg(irc, "active otr connection with %s, terminate it first", args[2]);
[c595308]	1339	return;
	1340	}
[5ebff60]	1341
[c595308]	1342	s = g_strdup_printf("about to forget otr data about %s, are you sure?", args[2]);
[6738a67]	1343	p = g_malloc(sizeof(pair_t));
[5ebff60]	1344	if (!p) {
[6738a67]	1345	return;
[5ebff60]	1346	}
[6738a67]	1347	p->fst = irc;
	1348	p->snd = ctx;
[ad2d8bc]	1349	query_add(irc, NULL, s, yes_forget_context, NULL, NULL, p);
[82e8fe8]	1350	g_free(s);
[5ebff60]	1351	} else if (!strcmp(args[1], "key")) {
[d0faf62]	1352	OtrlPrivKey *key;
	1353	char *s;
[5ebff60]	1354
	1355	key = match_privkey(irc, ((const char **) args) + 2);
	1356	if (!key) {
[d0faf62]	1357	/* match_privkey does error messages */
	1358	return;
	1359	}
[5ebff60]	1360
[d0faf62]	1361	s = g_strdup_printf("about to forget the private key for %s/%s, are you sure?",
[5ebff60]	1362	key->accountname, key->protocol);
[ad2d8bc]	1363	query_add(irc, NULL, s, yes_forget_key, NULL, NULL, key);
[d0faf62]	1364	g_free(s);
[5ebff60]	1365	} else {
[e67e513]	1366	irc_rootmsg(irc, "otr %s: unknown subcommand \"%s\", see \x02help otr forget\x02",
[5ebff60]	1367	args[0], args[1]);
[c595308]	1368	}
	1369	}
	1370
[764c7d1]	1371
	1372	/* local helpers / subroutines: */
	1373
[090c9b7]	1374	void log_otr_message(void opdata, const char fmt, ...)
	1375	{
	1376	va_list va;
	1377
	1378	va_start(va, fmt);
	1379	char *msg = g_strdup_vprintf(fmt, va);
	1380	va_end(va);
[5ebff60]	1381
[090c9b7]	1382	log_message(LOGLVL_INFO, "otr: %s", msg);
[098a75b]	1383
	1384	g_free(msg);
[090c9b7]	1385	}
	1386
	1387	void display_otr_message(void opdata, ConnContext ctx, const char *fmt, ...)
	1388	{
	1389	struct im_connection *ic =
[5ebff60]	1390	check_imc(opdata, ctx->accountname, ctx->protocol);
[090c9b7]	1391	irc_t *irc = ic->bee->ui_data;
	1392	irc_user_t *u = peeruser(irc, ctx->username, ctx->protocol);
	1393	va_list va;
	1394
	1395	va_start(va, fmt);
	1396	char *msg = g_strdup_vprintf(fmt, va);
	1397	va_end(va);
	1398
[5ebff60]	1399	if (u) {
[090c9b7]	1400	/* display as a notice from this particular user */
	1401	irc_usernotice(u, "%s", msg);
	1402	} else {
	1403	irc_rootmsg(irc, "[otr] %s", msg);
	1404	}
	1405
	1406	g_free(msg);
	1407	}
	1408
[99a01b9]	1409	/* combined handler for the 'otr smp' and 'otr smpq' commands */
[7c91392]	1410	void otr_smp_or_smpq(irc_t irc, const char nick, const char *question,
[5ebff60]	1411	const char *secret)
[99a01b9]	1412	{
	1413	irc_user_t *u;
	1414	ConnContext *ctx;
[329f9fe]	1415	otrl_instag_t instag = OTRL_INSTAG_BEST; // XXX
[99a01b9]	1416
	1417	u = irc_user_by_name(irc, nick);
[5ebff60]	1418	if (!u \|\| !u->bu \|\| !u->bu->ic) {
[e67e513]	1419	irc_rootmsg(irc, "%s: unknown user", nick);
[99a01b9]	1420	return;
	1421	}
[5ebff60]	1422	if (!(u->bu->flags & BEE_USER_ONLINE)) {
[e67e513]	1423	irc_rootmsg(irc, "%s is offline", nick);
[99a01b9]	1424	return;
	1425	}
[5ebff60]	1426
[99a01b9]	1427	ctx = otrl_context_find(irc->otr->us, u->bu->handle,
[5ebff60]	1428	u->bu->ic->acc->user, u->bu->ic->acc->prpl->name, instag, 0, NULL, NULL, NULL);
	1429	if (!ctx \|\| ctx->msgstate != OTRL_MSGSTATE_ENCRYPTED) {
[e67e513]	1430	irc_rootmsg(irc, "smp: otr inactive with %s, try \x02otr connect"
[5ebff60]	1431	" %s\x02", nick, nick);
[99a01b9]	1432	return;
	1433	}
	1434
[5ebff60]	1435	if (ctx->smstate->nextExpected != OTRL_SMP_EXPECT1) {
[99a01b9]	1436	log_message(LOGLVL_INFO,
[5ebff60]	1437	"SMP already in phase %d, sending abort before reinitiating",
	1438	ctx->smstate->nextExpected + 1);
[99a01b9]	1439	otrl_message_abort_smp(irc->otr->us, &otr_ops, u->bu->ic, ctx);
	1440	otrl_sm_state_free(ctx->smstate);
	1441	}
[944d7a5]	1442
[5ebff60]	1443	if (question) {
[9cc653c]	1444	/* this was 'otr smpq', just initiate */
[e67e513]	1445	irc_rootmsg(irc, "smp: initiating with %s...", u->nick);
[9cc653c]	1446	otrl_message_initiate_smp_q(irc->otr->us, &otr_ops, u->bu->ic, ctx,
[5ebff60]	1447	question, (unsigned char *) secret, strlen(secret));
[9cc653c]	1448	/* smp is now in EXPECT2 */
	1449	} else {
	1450	/* this was 'otr smp', initiate or reply */
	1451	/* warning: the following assumes that smstates are cleared whenever an SMP
[5ebff60]	1452	is completed or aborted! */
	1453	if (ctx->smstate->secret == NULL) {
[e67e513]	1454	irc_rootmsg(irc, "smp: initiating with %s...", u->nick);
[99a01b9]	1455	otrl_message_initiate_smp(irc->otr->us, &otr_ops,
[5ebff60]	1456	u->bu->ic, ctx, (unsigned char *) secret, strlen(secret));
[9cc653c]	1457	/* smp is now in EXPECT2 */
	1458	} else {
	1459	/* if we're still in EXPECT1 but smstate is initialized, we must have
	1460	received the SMP1, so let's issue a response */
[e67e513]	1461	irc_rootmsg(irc, "smp: responding to %s...", u->nick);
[9cc653c]	1462	otrl_message_respond_smp(irc->otr->us, &otr_ops,
[5ebff60]	1463	u->bu->ic, ctx, (unsigned char *) secret, strlen(secret));
[9cc653c]	1464	/* smp is now in EXPECT3 */
[99a01b9]	1465	}
	1466	}
	1467	}
	1468
[22ec21d]	1469	/* timeout handler that calls otrl_message_poll */
	1470	gboolean ev_message_poll(gpointer data, gint fd, b_input_condition cond)
	1471	{
	1472	otr_t *otr = data;
	1473
[5ebff60]	1474	if (otr && otr->us) {
[c347a12]	1475	otrl_message_poll(otr->us, &otr_ops, NULL);
[5ebff60]	1476	}
[22ec21d]	1477
[5ebff60]	1478	return TRUE; /* cycle timer */
[22ec21d]	1479	}
	1480
[764c7d1]	1481	/* helper to assert that account and protocol names given to ops below always
	1482	match the im_connection passed through as opdata */
	1483	struct im_connection check_imc(void opdata, const char *accountname,
[5ebff60]	1484	const char *protocol)
[764c7d1]	1485	{
[5ebff60]	1486	struct im_connection ic = (struct im_connection ) opdata;
[764c7d1]	1487
[fa9478e]	1488	/* libotr 4.0.0 has a bug where it doesn't set opdata, so we catch
	1489	* that and try to find the desired connection in the global list. */
[5ebff60]	1490	if (!ic) {
[fa9478e]	1491	GSList *l;
[5ebff60]	1492	for (l = get_connections(); l; l = l->next) {
[fa9478e]	1493	ic = l->data;
[5ebff60]	1494	if (strcmp(accountname, ic->acc->user) == 0 &&
	1495	strcmp(protocol, ic->acc->prpl->name) == 0) {
[fa9478e]	1496	break;
[5ebff60]	1497	}
[fa9478e]	1498	}
	1499	assert(l != NULL); /* a match should always be found */
[5ebff60]	1500	if (!l) {
[37ed402]	1501	return NULL;
[5ebff60]	1502	}
[fa9478e]	1503	}
	1504
[764c7d1]	1505	if (strcmp(accountname, ic->acc->user) != 0) {
	1506	log_message(LOGLVL_WARNING,
[5ebff60]	1507	"otr: internal account name mismatch: '%s' vs '%s'",
	1508	accountname, ic->acc->user);
[764c7d1]	1509	}
	1510	if (strcmp(protocol, ic->acc->prpl->name) != 0) {
	1511	log_message(LOGLVL_WARNING,
[5ebff60]	1512	"otr: internal protocol name mismatch: '%s' vs '%s'",
	1513	protocol, ic->acc->prpl->name);
[764c7d1]	1514	}
[5ebff60]	1515
[764c7d1]	1516	return ic;
	1517	}
	1518
[ad2d8bc]	1519	irc_user_t peeruser(irc_t irc, const char handle, const char protocol)
[764c7d1]	1520	{
[ad2d8bc]	1521	GSList *l;
[5ebff60]	1522
	1523	for (l = irc->b->users; l; l = l->next) {
[ad2d8bc]	1524	bee_user_t *bu = l->data;
[764c7d1]	1525	struct prpl *prpl;
[5ebff60]	1526	if (!bu->ui_data \|\| !bu->ic \|\| !bu->handle) {
[8521b02]	1527	continue;
[5ebff60]	1528	}
[ad2d8bc]	1529	prpl = bu->ic->acc->prpl;
[5ebff60]	1530	if (strcmp(prpl->name, protocol) == 0
	1531	&& prpl->handle_cmp(bu->handle, handle) == 0) {
[ad2d8bc]	1532	return bu->ui_data;
[764c7d1]	1533	}
	1534	}
[5ebff60]	1535
[5a71d9c]	1536	return NULL;
	1537	}
	1538
[8521b02]	1539	int hexval(char a)
	1540	{
[5ebff60]	1541	int x = g_ascii_tolower(a);
	1542
	1543	if (x >= 'a' && x <= 'f') {
[8521b02]	1544	x = x - 'a' + 10;
[5ebff60]	1545	} else if (x >= '0' && x <= '9') {
[8521b02]	1546	x = x - '0';
[5ebff60]	1547	} else {
[8521b02]	1548	return -1;
[5ebff60]	1549	}
	1550
[8521b02]	1551	return x;
	1552	}
	1553
[5a71d9c]	1554	const char peernick(irc_t irc, const char handle, const char protocol)
	1555	{
	1556	static char fallback[512];
[5ebff60]	1557
[ad2d8bc]	1558	irc_user_t *u = peeruser(irc, handle, protocol);
[5ebff60]	1559
	1560	if (u) {
[5a71d9c]	1561	return u->nick;
	1562	} else {
	1563	g_snprintf(fallback, 511, "%s/%s", handle, protocol);
	1564	return fallback;
	1565	}
	1566	}
	1567
[a0c6fc5]	1568	void otr_update_uflags(ConnContext context, irc_user_t u)
	1569	{
	1570	const char *trust;
	1571
[5ebff60]	1572	if (context->active_fingerprint) {
[a0c6fc5]	1573	u->flags \|= IRC_USER_OTR_ENCRYPTED;
	1574
	1575	trust = context->active_fingerprint->trust;
[5ebff60]	1576	if (trust && trust[0]) {
[a0c6fc5]	1577	u->flags \|= IRC_USER_OTR_TRUSTED;
[5ebff60]	1578	} else {
[a0c6fc5]	1579	u->flags &= ~IRC_USER_OTR_TRUSTED;
[5ebff60]	1580	}
[a0c6fc5]	1581	} else {
	1582	u->flags &= ~IRC_USER_OTR_ENCRYPTED;
	1583	}
	1584	}
	1585
[ad2d8bc]	1586	int otr_update_modeflags(irc_t irc, irc_user_t u)
[5a71d9c]	1587	{
[1dc00fe]	1588	return 0;
[764c7d1]	1589	}
	1590
	1591	void show_fingerprints(irc_t irc, ConnContext ctx)
	1592	{
	1593	char human[45];
	1594	Fingerprint *fp;
	1595	const char *trust;
[5ebff60]	1596	int count = 0;
	1597
[2c81d15]	1598	/* Is this a subcontext? If so, only list the active fingerprint */
	1599	if (ctx->m_context != ctx) {
	1600	fp = ctx->active_fingerprint;
	1601	} else {
	1602	fp = &ctx->fingerprint_root;
	1603	}
	1604
	1605	while (fp) {
[5ebff60]	1606	if (!fp->fingerprint) {
[2c81d15]	1607	fp = fp->next;
[764c7d1]	1608	continue;
[5ebff60]	1609	}
[764c7d1]	1610	count++;
	1611	otrl_privkey_hash_to_human(human, fp->fingerprint);
[5ebff60]	1612	if (!fp->trust \|\| fp->trust[0] == '\0') {
	1613	trust = "untrusted";
[764c7d1]	1614	} else {
[5ebff60]	1615	trust = fp->trust;
[764c7d1]	1616	}
[5ebff60]	1617	if (fp == ctx->active_fingerprint) {
[2c81d15]	1618	irc_rootmsg(irc, " \x02%s (%s)\x02", human, trust);
[764c7d1]	1619	} else {
[2c81d15]	1620	irc_rootmsg(irc, " %s (%s)", human, trust);
[764c7d1]	1621	}
[2c81d15]	1622
	1623	/* Break if this is a subcontext - we only print active fp */
	1624	if (ctx->m_context != ctx) {
	1625	break;
	1626	}
	1627	fp = fp->next;
[764c7d1]	1628	}
[5ebff60]	1629	if (count == 0) {
[2c81d15]	1630	irc_rootmsg(irc, " (none)");
[5ebff60]	1631	}
[8521b02]	1632	}
	1633
[c595308]	1634	Fingerprint match_fingerprint(irc_t irc, ConnContext ctx, const char *args)
	1635	{
	1636	Fingerprint fp, fp2;
	1637	char human[45];
	1638	char prefix[45], *p;
	1639	int n;
[5ebff60]	1640	int i, j;
	1641
[c595308]	1642	/* assemble the args into a prefix in standard "human" form */
[5ebff60]	1643	n = 0;
	1644	p = prefix;
	1645	for (i = 0; args[i]; i++) {
	1646	for (j = 0; args[i][j]; j++) {
[6b13103]	1647	char c = g_ascii_toupper(args[i][j]);
[5ebff60]	1648
	1649	if (n >= 40) {
[e67e513]	1650	irc_rootmsg(irc, "too many fingerprint digits given, expected at most 40");
[c595308]	1651	return NULL;
	1652	}
[5ebff60]	1653
	1654	if ((c >= 'A' && c <= 'F') \|\| (c >= '0' && c <= '9')) {
[c595308]	1655	*(p++) = c;
	1656	} else {
[5ebff60]	1657	irc_rootmsg(irc, "invalid hex digit '%c' in block %d", args[i][j], i + 1);
[c595308]	1658	return NULL;
	1659	}
[5ebff60]	1660
[c595308]	1661	n++;
[5ebff60]	1662	if (n % 8 == 0) {
[c595308]	1663	*(p++) = ' ';
[5ebff60]	1664	}
[c595308]	1665	}
	1666	}
	1667	*p = '\0';
[5ebff60]	1668
[c595308]	1669	/* find first fingerprint with the given prefix */
	1670	n = strlen(prefix);
[5ebff60]	1671	for (fp = &ctx->fingerprint_root; fp; fp = fp->next) {
	1672	if (!fp->fingerprint) {
[c595308]	1673	continue;
[5ebff60]	1674	}
[c595308]	1675	otrl_privkey_hash_to_human(human, fp->fingerprint);
[5ebff60]	1676	if (!strncmp(prefix, human, n)) {
[c595308]	1677	break;
[5ebff60]	1678	}
[c595308]	1679	}
[5ebff60]	1680	if (!fp) {
[e67e513]	1681	irc_rootmsg(irc, "%s: no match", prefix);
[c595308]	1682	return NULL;
	1683	}
[5ebff60]	1684
[c595308]	1685	/* make sure the match, if any, is unique */
[5ebff60]	1686	for (fp2 = fp->next; fp2; fp2 = fp2->next) {
	1687	if (!fp2->fingerprint) {
[c595308]	1688	continue;
[5ebff60]	1689	}
[c595308]	1690	otrl_privkey_hash_to_human(human, fp2->fingerprint);
[5ebff60]	1691	if (!strncmp(prefix, human, n)) {
[c595308]	1692	break;
[5ebff60]	1693	}
[c595308]	1694	}
[5ebff60]	1695	if (fp2) {
[e67e513]	1696	irc_rootmsg(irc, "%s: multiple matches", prefix);
[c595308]	1697	return NULL;
	1698	}
[5ebff60]	1699
[c595308]	1700	return fp;
	1701	}
	1702
[5f4eede]	1703	OtrlPrivKey match_privkey(irc_t irc, const char **args)
	1704	{
	1705	OtrlPrivKey k, k2;
	1706	char human[45];
	1707	char prefix[45], *p;
	1708	int n;
[5ebff60]	1709	int i, j;
	1710
[5f4eede]	1711	/* assemble the args into a prefix in standard "human" form */
[5ebff60]	1712	n = 0;
	1713	p = prefix;
	1714	for (i = 0; args[i]; i++) {
	1715	for (j = 0; args[i][j]; j++) {
[6b13103]	1716	char c = g_ascii_toupper(args[i][j]);
[5ebff60]	1717
	1718	if (n >= 40) {
[e67e513]	1719	irc_rootmsg(irc, "too many fingerprint digits given, expected at most 40");
[5f4eede]	1720	return NULL;
	1721	}
[5ebff60]	1722
	1723	if ((c >= 'A' && c <= 'F') \|\| (c >= '0' && c <= '9')) {
[5f4eede]	1724	*(p++) = c;
	1725	} else {
[5ebff60]	1726	irc_rootmsg(irc, "invalid hex digit '%c' in block %d", args[i][j], i + 1);
[5f4eede]	1727	return NULL;
	1728	}
[5ebff60]	1729
[5f4eede]	1730	n++;
[5ebff60]	1731	if (n % 8 == 0) {
[5f4eede]	1732	*(p++) = ' ';
[5ebff60]	1733	}
[5f4eede]	1734	}
	1735	}
	1736	*p = '\0';
[5ebff60]	1737
[0b1ae59]	1738	/* remove trailing whitespace */
	1739	g_strchomp(prefix);
	1740
[5f4eede]	1741	/* find first key which matches the given prefix */
	1742	n = strlen(prefix);
[5ebff60]	1743	for (k = irc->otr->us->privkey_root; k; k = k->next) {
[dc9797f]	1744	p = otrl_privkey_fingerprint(irc->otr->us, human, k->accountname, k->protocol);
[5ebff60]	1745	if (!p) { /* gah! :-P */
[5f4eede]	1746	continue;
[5ebff60]	1747	}
	1748	if (!strncmp(prefix, human, n)) {
[5f4eede]	1749	break;
[5ebff60]	1750	}
[5f4eede]	1751	}
[5ebff60]	1752	if (!k) {
[e67e513]	1753	irc_rootmsg(irc, "%s: no match", prefix);
[5f4eede]	1754	return NULL;
	1755	}
[5ebff60]	1756
[5f4eede]	1757	/* make sure the match, if any, is unique */
[5ebff60]	1758	for (k2 = k->next; k2; k2 = k2->next) {
[dc9797f]	1759	p = otrl_privkey_fingerprint(irc->otr->us, human, k2->accountname, k2->protocol);
[5ebff60]	1760	if (!p) { /* gah! :-P */
[5f4eede]	1761	continue;
[5ebff60]	1762	}
	1763	if (!strncmp(prefix, human, n)) {
[5f4eede]	1764	break;
[5ebff60]	1765	}
[5f4eede]	1766	}
[5ebff60]	1767	if (k2) {
[e67e513]	1768	irc_rootmsg(irc, "%s: multiple matches", prefix);
[5f4eede]	1769	return NULL;
	1770	}
[5ebff60]	1771
[5f4eede]	1772	return k;
	1773	}
	1774
[8521b02]	1775	void show_general_otr_info(irc_t *irc)
	1776	{
	1777	ConnContext *ctx;
	1778	OtrlPrivKey *key;
	1779	char human[45];
[3064ea4]	1780	kg_t *kg;
[8521b02]	1781
[3064ea4]	1782	/* list all privkeys (including ones being generated) */
[e67e513]	1783	irc_rootmsg(irc, "\x1fprivate keys:\x1f");
[5ebff60]	1784	for (key = irc->otr->us->privkey_root; key; key = key->next) {
[8521b02]	1785	const char *hash;
[5ebff60]	1786
	1787	switch (key->pubkey_type) {
[8521b02]	1788	case OTRL_PUBKEY_TYPE_DSA:
[e67e513]	1789	irc_rootmsg(irc, " %s/%s - DSA", key->accountname, key->protocol);
[8521b02]	1790	break;
	1791	default:
[e67e513]	1792	irc_rootmsg(irc, " %s/%s - type %d", key->accountname, key->protocol,
[5ebff60]	1793	key->pubkey_type);
[8521b02]	1794	}
	1795
	1796	/* No, it doesn't make much sense to search for the privkey again by
	1797	account/protocol, but libotr currently doesn't provide a direct routine
	1798	for hashing a given 'OtrlPrivKey'... */
[dc9797f]	1799	hash = otrl_privkey_fingerprint(irc->otr->us, human, key->accountname, key->protocol);
[5ebff60]	1800	if (hash) { /* should always succeed */
[e67e513]	1801	irc_rootmsg(irc, " %s", human);
[5ebff60]	1802	}
[8521b02]	1803	}
[5ebff60]	1804	if (irc->otr->sent_accountname) {
[e67e513]	1805	irc_rootmsg(irc, " %s/%s - DSA", irc->otr->sent_accountname,
[5ebff60]	1806	irc->otr->sent_protocol);
[e67e513]	1807	irc_rootmsg(irc, " (being generated)");
[1221ef0]	1808	}
[5ebff60]	1809	for (kg = irc->otr->todo; kg; kg = kg->next) {
[e67e513]	1810	irc_rootmsg(irc, " %s/%s - DSA", kg->accountname, kg->protocol);
	1811	irc_rootmsg(irc, " (queued)");
[3064ea4]	1812	}
[5ebff60]	1813	if (key == irc->otr->us->privkey_root &&
	1814	!irc->otr->sent_accountname &&
	1815	kg == irc->otr->todo) {
[e67e513]	1816	irc_rootmsg(irc, " (none)");
[5ebff60]	1817	}
[8521b02]	1818
	1819	/* list all contexts */
[e4752a6]	1820	/* XXX remove this, or split off as its own command */
[e67e513]	1821	irc_rootmsg(irc, "%s", "");
	1822	irc_rootmsg(irc, "\x1f" "connection contexts:\x1f (bold=currently encrypted)");
[2c81d15]	1823
	1824	ctx = irc->otr->us->context_root;
	1825	while (ctx) {
	1826	ConnContext *subctx;
[ad2d8bc]	1827	irc_user_t *u;
[8521b02]	1828	char *userstring;
[2c81d15]	1829	char encrypted = 0;
[5ebff60]	1830
[8521b02]	1831	u = peeruser(irc, ctx->username, ctx->protocol);
[5ebff60]	1832	if (u) {
[8521b02]	1833	userstring = g_strdup_printf("%s/%s/%s (%s)",
[5ebff60]	1834	ctx->username, ctx->protocol, ctx->accountname, u->nick);
	1835	} else {
[8521b02]	1836	userstring = g_strdup_printf("%s/%s/%s",
[5ebff60]	1837	ctx->username, ctx->protocol, ctx->accountname);
	1838	}
	1839
[2c81d15]	1840	subctx = ctx;
	1841	while (subctx && subctx->m_context == ctx) {
	1842	if (subctx->msgstate == OTRL_MSGSTATE_ENCRYPTED) {
	1843	encrypted = 1;
	1844	}
	1845	subctx = subctx->next;
	1846	}
	1847
	1848	if(encrypted) {
[e67e513]	1849	irc_rootmsg(irc, " \x02%s\x02", userstring);
[8521b02]	1850	} else {
[e67e513]	1851	irc_rootmsg(irc, " %s", userstring);
[8521b02]	1852	}
[5ebff60]	1853
[2c81d15]	1854	/* Skip subcontexts/instances from output */
	1855	ctx = subctx;
	1856
[8521b02]	1857	g_free(userstring);
	1858	}
[2c81d15]	1859
[5ebff60]	1860	if (ctx == irc->otr->us->context_root) {
[e67e513]	1861	irc_rootmsg(irc, " (none)");
[5ebff60]	1862	}
[8521b02]	1863	}
	1864
[2c81d15]	1865	void show_otr_context_info(irc_t irc, ConnContext ctx, ConnContext *bestctx)
[8521b02]	1866	{
[2c81d15]	1867	ConnContext *subctx;
	1868	int instcount = 0;
	1869
	1870	subctx = ctx;
	1871	while (subctx && subctx->m_context == ctx) {
	1872	if (subctx->m_context == subctx) {
	1873	if (subctx == bestctx) {
	1874	irc_rootmsg(irc, " \x02master context (target):\x02");
	1875	} else {
	1876	irc_rootmsg(irc, " master context:");
	1877	}
	1878	irc_rootmsg(irc, " known fingerprints (bold = active for v1 or v2):");
	1879	} else {
	1880	if (subctx == bestctx) {
	1881	irc_rootmsg(irc, " \x02instance %d (target):\x02", instcount);
	1882	} else {
	1883	irc_rootmsg(irc, " instance %d:", instcount);
	1884	}
	1885	irc_rootmsg(irc, " active fingerprint:");
	1886	instcount++;
	1887	}
[f93e01c]	1888
[2c81d15]	1889	show_fingerprints(irc, subctx);
[8521b02]	1890
[2c81d15]	1891	switch (subctx->msgstate) {
	1892	case OTRL_MSGSTATE_PLAINTEXT:
	1893	irc_rootmsg(irc, " connection state: cleartext");
	1894	break;
	1895	case OTRL_MSGSTATE_ENCRYPTED:
	1896	irc_rootmsg(irc, " connection state: encrypted (v%d)", subctx->protocol_version);
	1897	break;
	1898	case OTRL_MSGSTATE_FINISHED:
	1899	irc_rootmsg(irc, " connection state: shut down");
	1900	break;
	1901	default:
	1902	irc_rootmsg(irc, " connection state: %d", subctx->msgstate);
	1903	}
[8521b02]	1904
[2c81d15]	1905	subctx = subctx->next;
	1906	}
[764c7d1]	1907	}
	1908
[dc9797f]	1909	int keygen_in_progress(irc_t irc, const char handle, const char *protocol)
	1910	{
	1911	kg_t *kg;
[5ebff60]	1912
	1913	if (!irc->otr->sent_accountname \|\| !irc->otr->sent_protocol) {
[dc9797f]	1914	return 0;
[5ebff60]	1915	}
[dc9797f]	1916
	1917	/* are we currently working on this key? */
[5ebff60]	1918	if (!strcmp(handle, irc->otr->sent_accountname) &&
	1919	!strcmp(protocol, irc->otr->sent_protocol)) {
[dc9797f]	1920	return 1;
[5ebff60]	1921	}
	1922
[dc9797f]	1923	/* do we have it queued for later? */
[5ebff60]	1924	for (kg = irc->otr->todo; kg; kg = kg->next) {
	1925	if (!strcmp(handle, kg->accountname) &&
	1926	!strcmp(protocol, kg->protocol)) {
[dc9797f]	1927	return 1;
[5ebff60]	1928	}
[dc9797f]	1929	}
[5ebff60]	1930
[dc9797f]	1931	return 0;
	1932	}
	1933
[764c7d1]	1934	void otr_keygen(irc_t irc, const char handle, const char *protocol)
	1935	{
[dc9797f]	1936	/* do nothing if a key for the requested account is already being generated */
[5ebff60]	1937	if (keygen_in_progress(irc, handle, protocol)) {
[dc9797f]	1938	return;
[5ebff60]	1939	}
[764c7d1]	1940
[522a00f]	1941	/* see if we already have a keygen child running. if not, start one and put a
[27db433]	1942	handler on its output. */
[5ebff60]	1943	if (!irc->otr->keygen \|\| waitpid(irc->otr->keygen, NULL, WNOHANG)) {
[27db433]	1944	pid_t p;
	1945	int to[2], from[2];
	1946	FILE tof, fromf;
[5ebff60]	1947
	1948	if (pipe(to) < 0 \|\| pipe(from) < 0) {
[e67e513]	1949	irc_rootmsg(irc, "otr keygen: couldn't create pipe: %s", strerror(errno));
[27db433]	1950	return;
	1951	}
[5ebff60]	1952
[27db433]	1953	tof = fdopen(to[1], "w");
	1954	fromf = fdopen(from[0], "r");
[5ebff60]	1955	if (!tof \|\| !fromf) {
[e67e513]	1956	irc_rootmsg(irc, "otr keygen: couldn't streamify pipe: %s", strerror(errno));
[27db433]	1957	return;
	1958	}
[5ebff60]	1959
[27db433]	1960	p = fork();
[5ebff60]	1961	if (p < 0) {
[e67e513]	1962	irc_rootmsg(irc, "otr keygen: couldn't fork: %s", strerror(errno));
[27db433]	1963	return;
	1964	}
[5ebff60]	1965
	1966	if (!p) {
[27db433]	1967	/* child process */
	1968	signal(SIGTERM, exit);
[12cc58b]	1969	keygen_child_main(irc->otr->us, to[0], from[1]);
[27db433]	1970	exit(0);
	1971	}
[5ebff60]	1972
[dc9797f]	1973	irc->otr->keygen = p;
	1974	irc->otr->to = tof;
	1975	irc->otr->from = fromf;
	1976	irc->otr->sent_accountname = NULL;
	1977	irc->otr->sent_protocol = NULL;
	1978	irc->otr->todo = NULL;
[ad2d8bc]	1979	b_input_add(from[0], B_EV_IO_READ, keygen_finish_handler, irc);
[27db433]	1980	}
[5ebff60]	1981
[dc9797f]	1982	/* is the keygen slave currently working? */
[5ebff60]	1983	if (irc->otr->sent_accountname) {
[dc9797f]	1984	/* enqueue our job for later transmission */
	1985	kg_t **kg = &irc->otr->todo;
[5ebff60]	1986	while (*kg) {
	1987	kg = &((*kg)->next);
	1988	}
[dc9797f]	1989	*kg = g_new0(kg_t, 1);
[ba5add7]	1990	(*kg)->accountname = g_strdup(handle);
	1991	(*kg)->protocol = g_strdup(protocol);
[dc9797f]	1992	} else {
	1993	/* send our job over and remember it */
	1994	fprintf(irc->otr->to, "%s\n%s\n", handle, protocol);
	1995	fflush(irc->otr->to);
[ba5add7]	1996	irc->otr->sent_accountname = g_strdup(handle);
	1997	irc->otr->sent_protocol = g_strdup(protocol);
[dc9797f]	1998	}
[27db433]	1999	}
[522a00f]	2000
[12cc58b]	2001	void keygen_child_main(OtrlUserState us, int infd, int outfd)
[27db433]	2002	{
	2003	FILE input, output;
	2004	char filename[128], accountname[512], protocol[512];
	2005	gcry_error_t e;
	2006	int tempfd;
[5ebff60]	2007
[27db433]	2008	input = fdopen(infd, "r");
	2009	output = fdopen(outfd, "w");
[5ebff60]	2010
	2011	while (!feof(input) && !ferror(input) && !feof(output) && !ferror(output)) {
[27db433]	2012	myfgets(accountname, 512, input);
	2013	myfgets(protocol, 512, input);
[5ebff60]	2014
[27db433]	2015	strncpy(filename, "/tmp/bitlbee-XXXXXX", 128);
	2016	tempfd = mkstemp(filename);
	2017	close(tempfd);
	2018
	2019	e = otrl_privkey_generate(us, filename, accountname, protocol);
[5ebff60]	2020	if (e) {
[27db433]	2021	fprintf(output, "\n"); /* this means failure */
	2022	fprintf(output, "otr keygen: %s\n", gcry_strerror(e));
	2023	unlink(filename);
	2024	} else {
	2025	fprintf(output, "%s\n", filename);
	2026	fprintf(output, "otr keygen for %s/%s complete\n", accountname, protocol);
	2027	}
	2028	fflush(output);
	2029	}
[5ebff60]	2030
[27db433]	2031	fclose(input);
	2032	fclose(output);
[764c7d1]	2033	}
	2034
	2035	gboolean keygen_finish_handler(gpointer data, gint fd, b_input_condition cond)
	2036	{
[5ebff60]	2037	irc_t irc = (irc_t ) data;
[27db433]	2038	char filename[512], msg[512];
	2039
[dc9797f]	2040	myfgets(filename, 512, irc->otr->from);
	2041	myfgets(msg, 512, irc->otr->from);
[5ebff60]	2042
[e67e513]	2043	irc_rootmsg(irc, "%s", msg);
[5ebff60]	2044	if (filename[0]) {
	2045	if (strsane(irc->user->nick)) {
[c7b94ef]	2046	char *kf = g_strdup_printf("%s%s.otr_keys", global.conf->configdir, irc->user->nick);
	2047	char *tmp = g_strdup_printf("%s.new", kf);
	2048	copyfile(filename, tmp);
	2049	unlink(filename);
[5ebff60]	2050	rename(tmp, kf);
[c7b94ef]	2051	otrl_privkey_read(irc->otr->us, kf);
	2052	g_free(kf);
	2053	g_free(tmp);
	2054	} else {
	2055	otrl_privkey_read(irc->otr->us, filename);
	2056	unlink(filename);
	2057	}
[27db433]	2058	}
[5ebff60]	2059
[dc9797f]	2060	/* forget this job */
[ba5add7]	2061	g_free(irc->otr->sent_accountname);
	2062	g_free(irc->otr->sent_protocol);
[dc9797f]	2063	irc->otr->sent_accountname = NULL;
	2064	irc->otr->sent_protocol = NULL;
[5ebff60]	2065
[dc9797f]	2066	/* see if there are any more in the queue */
[5ebff60]	2067	if (irc->otr->todo) {
[dc9797f]	2068	kg_t *p = irc->otr->todo;
	2069	/* send the next one over */
	2070	fprintf(irc->otr->to, "%s\n%s\n", p->accountname, p->protocol);
	2071	fflush(irc->otr->to);
	2072	irc->otr->sent_accountname = p->accountname;
	2073	irc->otr->sent_protocol = p->protocol;
	2074	irc->otr->todo = p->next;
	2075	g_free(p);
	2076	return TRUE; /* keep watching */
	2077	} else {
	2078	/* okay, the slave is idle now, so kill him */
	2079	fclose(irc->otr->from);
	2080	fclose(irc->otr->to);
[2dcaf9a]	2081	irc->otr->from = irc->otr->to = NULL;
[dc9797f]	2082	kill(irc->otr->keygen, SIGTERM);
	2083	waitpid(irc->otr->keygen, NULL, 0);
	2084	irc->otr->keygen = 0;
[27db433]	2085	return FALSE; /* unregister ourselves */
	2086	}
	2087	}
	2088
	2089	void copyfile(const char a, const char b)
	2090	{
	2091	int fda, fdb;
	2092	int n;
	2093	char buf[1024];
[5ebff60]	2094
[27db433]	2095	fda = open(a, O_RDONLY);
	2096	fdb = open(b, O_WRONLY \| O_CREAT \| O_TRUNC, 0600);
[5ebff60]	2097
	2098	while ((n = read(fda, buf, 1024)) > 0) {
[27db433]	2099	write(fdb, buf, n);
[5ebff60]	2100	}
	2101
[27db433]	2102	close(fda);
[5ebff60]	2103	close(fdb);
[27db433]	2104	}
	2105
	2106	void myfgets(char s, int size, FILE stream)
	2107	{
[5ebff60]	2108	if (!fgets(s, size, stream)) {
[27db433]	2109	s[0] = '\0';
	2110	} else {
	2111	int n = strlen(s);
[5ebff60]	2112	if (n > 0 && s[n - 1] == '\n') {
	2113	s[n - 1] = '\0';
	2114	}
[27db433]	2115	}
[764c7d1]	2116	}
	2117
[6738a67]	2118	void yes_keygen(void *data)
[764c7d1]	2119	{
[5ebff60]	2120	account_t acc = (account_t ) data;
[ad2d8bc]	2121	irc_t *irc = acc->bee->ui_data;
[5ebff60]	2122
	2123	if (keygen_in_progress(irc, acc->user, acc->prpl->name)) {
[e67e513]	2124	irc_rootmsg(irc, "keygen for %s/%s already in progress",
[5ebff60]	2125	acc->user, acc->prpl->name);
[dc9797f]	2126	} else {
[e67e513]	2127	irc_rootmsg(irc, "starting background keygen for %s/%s",
[5ebff60]	2128	acc->user, acc->prpl->name);
[e67e513]	2129	irc_rootmsg(irc, "you will be notified when it completes");
[ad2d8bc]	2130	otr_keygen(irc, acc->user, acc->prpl->name);
[dc9797f]	2131	}
[764c7d1]	2132	}
[3231485]	2133
[c7b94ef]	2134	/* check whether a string is safe to use in a path component */
	2135	int strsane(const char *s)
	2136	{
	2137	return strpbrk(s, "/\\") == NULL;
	2138	}
	2139
[c239fff]	2140	/* close the OTR connection with the given buddy */
	2141	gboolean otr_disconnect_user(irc_t irc, irc_user_t u)
	2142	{
[5ebff60]	2143	if (!u \|\| !u->bu \|\| !u->bu->ic) {
[c239fff]	2144	return FALSE;
[5ebff60]	2145	}
[c239fff]	2146
	2147	/* XXX we disconnect all instances; is that what we want? */
	2148	otrl_message_disconnect_all_instances(irc->otr->us, &otr_ops,
[5ebff60]	2149	u->bu->ic, u->bu->ic->acc->user, u->bu->ic->acc->prpl->name,
	2150	u->bu->handle);
	2151
[c239fff]	2152	u->flags &= ~IRC_USER_OTR_TRUSTED;
	2153	u->flags &= ~IRC_USER_OTR_ENCRYPTED;
	2154	otr_update_modeflags(irc, u);
	2155
	2156	return TRUE;
	2157	}
	2158
	2159	/* close all active OTR connections */
	2160	void otr_disconnect_all(irc_t *irc)
	2161	{
	2162	irc_user_t *u;
	2163	ConnContext *ctx;
	2164
[5ebff60]	2165	for (ctx = irc->otr->us->context_root; ctx; ctx = ctx->next) {
	2166	if (ctx->msgstate == OTRL_MSGSTATE_ENCRYPTED) {
[c239fff]	2167	u = peeruser(irc, ctx->username, ctx->protocol);
	2168	(void) otr_disconnect_user(irc, u);
	2169	}
	2170	}
	2171	}

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