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source: otr.c @ 4fe91a1

Last change on this file since 4fe91a1 was 47ab9a9, checked in by dequis <dx@…>, at 2015-11-27T23:42:00Z
misc.c: Add a str_reject_chars function, use it in otr_filter_colors
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 */
[09f7ec1]	443	if (ic->acc->prpl->options & OPT_NOOTR \|\|
	444	iu->bu->flags & BEE_USER_NOOTR) {
[934db064]	445	return msg;
[1dd3470]	446	}
[5ebff60]	447
[0c85c08]	448	ignore_msg = otrl_message_receiving(irc->otr->us, &otr_ops, ic,
[5ebff60]	449	ic->acc->user, ic->acc->prpl->name, iu->bu->handle, msg, &newmsg,
	450	&tlvs, NULL, NULL, NULL);
[764c7d1]	451
[098a75b]	452	if (tlvs) {
	453	otrl_tlv_free(tlvs);
	454	}
	455
[5ebff60]	456	if (ignore_msg) {
[764c7d1]	457	/* this was an internal OTR protocol message */
	458	return NULL;
[5ebff60]	459	} else if (!newmsg) {
[764c7d1]	460	/* this was a non-OTR message */
[86fd261]	461	return otr_filter_colors(msg);
[764c7d1]	462	} else {
[da44b08]	463	/* we're done with the original msg, which will be caller-freed. */
[5d2bc9d]	464	return newmsg;
[764c7d1]	465	}
	466	}
	467
[934db064]	468	char otr_filter_msg_out(irc_user_t iu, char *msg, int flags)
[5ebff60]	469	{
[5a71d9c]	470	int st;
	471	char *otrmsg = NULL;
	472	ConnContext *ctx = NULL;
[934db064]	473	irc_t *irc = iu->irc;
	474	struct im_connection *ic = iu->bu->ic;
[329f9fe]	475	otrl_instag_t instag = OTRL_INSTAG_BEST; // XXX?
[5ebff60]	476
[329f9fe]	477	/* NB: in libotr 4.0.0 OTRL_INSTAG_RECENT will cause a null-pointer deref
	478	* in otrl_message_sending with newly-added OTR contexts.
	479	*/
[1dd3470]	480
	481	/* don't do OTR on certain (not classic IM) protocols, e.g. twitter */
[09f7ec1]	482	if (ic->acc->prpl->options & OPT_NOOTR \|\|
	483	iu->bu->flags & BEE_USER_NOOTR) {
[934db064]	484	return msg;
[1dd3470]	485	}
[1082395]	486
[0c85c08]	487	st = otrl_message_sending(irc->otr->us, &otr_ops, ic,
[5ebff60]	488	ic->acc->user, ic->acc->prpl->name, iu->bu->handle, instag,
	489	msg, NULL, &otrmsg, OTRL_FRAGMENT_SEND_ALL_BUT_LAST, &ctx, NULL, NULL);
[367ea3c]	490
[5ebff60]	491	if (otrmsg && otrmsg != msg) {
[367ea3c]	492	/* libotr wants us to replace our message */
	493	/* NB: caller will free old msg */
[098a75b]	494	msg = st ? NULL : g_strdup(otrmsg);
[367ea3c]	495	otrl_message_free(otrmsg);
[764c7d1]	496	}
[5ebff60]	497
	498	if (st) {
[367ea3c]	499	irc_usernotice(iu, "otr: error handling outgoing message: %d", st);
[5ebff60]	500	msg = NULL; /* do not send plaintext! */
[cc17b76]	501	}
[367ea3c]	502
	503	return msg;
[764c7d1]	504	}
	505
[0c85c08]	506	static const struct irc_plugin otr_plugin =
	507	{
	508	otr_irc_new,
	509	otr_irc_free,
[934db064]	510	otr_filter_msg_out,
	511	otr_filter_msg_in,
[2dcaf9a]	512	otr_load,
	513	otr_save,
	514	otr_remove,
[0c85c08]	515	};
	516
[8358691]	517	static void cmd_otr(irc_t irc, char *args)
[764c7d1]	518	{
	519	const command_t *cmd;
[5ebff60]	520
	521	if (!args[0]) {
[764c7d1]	522	return;
[5ebff60]	523	}
	524
	525	if (!args[1]) {
[764c7d1]	526	return;
[5ebff60]	527	}
	528
	529	for (cmd = otr_commands; cmd->command; cmd++) {
	530	if (strcmp(cmd->command, args[1]) == 0) {
[764c7d1]	531	break;
[5ebff60]	532	}
[764c7d1]	533	}
[5ebff60]	534
	535	if (!cmd->command) {
[e67e513]	536	irc_rootmsg(irc, "%s: unknown subcommand \"%s\", see \x02help otr\x02",
[5ebff60]	537	args[0], args[1]);
[764c7d1]	538	return;
	539	}
[5ebff60]	540
	541	if (!args[cmd->required_parameters + 1]) {
[e67e513]	542	irc_rootmsg(irc, "%s %s: not enough arguments (%d req.)",
[5ebff60]	543	args[0], args[1], cmd->required_parameters);
[764c7d1]	544	return;
	545	}
[5ebff60]	546
	547	cmd->execute(irc, args + 1);
[764c7d1]	548	}
	549
	550
	551	/* OTR "MessageAppOps" callbacks for global.otr_ui: */
	552
	553	OtrlPolicy op_policy(void opdata, ConnContext context)
	554	{
[e2b15bb]	555	struct im_connection *ic = check_imc(opdata, context->accountname, context->protocol);
[ad2d8bc]	556	irc_t *irc = ic->bee->ui_data;
[e2b15bb]	557	const char *p;
[5ebff60]	558
[dc9797f]	559	/* policy override during keygen: if we're missing the key for context but are currently
	560	generating it, then that's as much as we can do. => temporarily return NEVER. */
[5ebff60]	561	if (keygen_in_progress(irc, context->accountname, context->protocol) &&
	562	!otrl_privkey_find(irc->otr->us, context->accountname, context->protocol)) {
[dc9797f]	563	return OTRL_POLICY_NEVER;
[5ebff60]	564	}
[e2b15bb]	565
[ad2d8bc]	566	p = set_getstr(&ic->bee->set, "otr_policy");
[5ebff60]	567	if (!strcmp(p, "never")) {
[e2b15bb]	568	return OTRL_POLICY_NEVER;
[5ebff60]	569	}
	570	if (!strcmp(p, "opportunistic")) {
[e2b15bb]	571	return OTRL_POLICY_OPPORTUNISTIC;
[5ebff60]	572	}
	573	if (!strcmp(p, "manual")) {
[e2b15bb]	574	return OTRL_POLICY_MANUAL;
[5ebff60]	575	}
	576	if (!strcmp(p, "always")) {
[e2b15bb]	577	return OTRL_POLICY_ALWAYS;
[5ebff60]	578	}
	579
[764c7d1]	580	return OTRL_POLICY_OPPORTUNISTIC;
	581	}
	582
	583	void op_create_privkey(void opdata, const char accountname,
[5ebff60]	584	const char *protocol)
[764c7d1]	585	{
	586	struct im_connection *ic = check_imc(opdata, accountname, protocol);
[ad2d8bc]	587	irc_t *irc = ic->bee->ui_data;
[5ebff60]	588
[dc9797f]	589	/* will fail silently if keygen already in progress */
[ad2d8bc]	590	otr_keygen(irc, accountname, protocol);
[764c7d1]	591	}
	592
	593	int op_is_logged_in(void opdata, const char accountname,
[5ebff60]	594	const char protocol, const char recipient)
[764c7d1]	595	{
	596	struct im_connection *ic = check_imc(opdata, accountname, protocol);
[ad2d8bc]	597	bee_user_t *bu;
[764c7d1]	598
[ad2d8bc]	599	/* lookup the irc_user_t for the given recipient */
	600	bu = bee_user_by_handle(ic->bee, ic, recipient);
[5ebff60]	601	if (bu) {
	602	if (bu->flags & BEE_USER_ONLINE) {
[764c7d1]	603	return 1;
[5ebff60]	604	} else {
[764c7d1]	605	return 0;
[5ebff60]	606	}
[764c7d1]	607	} else {
	608	return -1;
	609	}
	610	}
	611
	612	void op_inject_message(void opdata, const char accountname,
[5ebff60]	613	const char protocol, const char recipient, const char *message)
[764c7d1]	614	{
	615	struct im_connection *ic = check_imc(opdata, accountname, protocol);
[ad2d8bc]	616	irc_t *irc = ic->bee->ui_data;
[764c7d1]	617
	618	if (strcmp(accountname, recipient) == 0) {
	619	/* huh? injecting messages to myself? */
[e67e513]	620	irc_rootmsg(irc, "note to self: %s", message);
[764c7d1]	621	} else {
	622	/* need to drop some consts here :-( */
	623	/* TODO: get flags into op_inject_message?! */
[5ebff60]	624	ic->acc->prpl->buddy_msg(ic, (char ) recipient, (char ) message, 0);
[764c7d1]	625	/* ignoring return value :-/ */
	626	}
	627	}
	628
	629	void op_new_fingerprint(void *opdata, OtrlUserState us,
[5ebff60]	630	const char accountname, const char protocol,
	631	const char *username, unsigned char fingerprint[20])
[764c7d1]	632	{
	633	struct im_connection *ic = check_imc(opdata, accountname, protocol);
[ad2d8bc]	634	irc_t *irc = ic->bee->ui_data;
[409c2de]	635	irc_user_t *u = peeruser(irc, username, protocol);
[5ebff60]	636	char hunam[45]; /* anybody looking? ;-) */
	637
[764c7d1]	638	otrl_privkey_hash_to_human(hunam, fingerprint);
[5ebff60]	639	if (u) {
[409c2de]	640	irc_usernotice(u, "new fingerprint: %s", hunam);
	641	} else {
	642	/* this case shouldn't normally happen */
	643	irc_rootmsg(irc, "new fingerprint for %s/%s: %s",
[5ebff60]	644	username, protocol, hunam);
[409c2de]	645	}
[764c7d1]	646	}
	647
	648	void op_write_fingerprints(void *opdata)
	649	{
[5ebff60]	650	struct im_connection ic = (struct im_connection ) opdata;
[ad2d8bc]	651	irc_t *irc = ic->bee->ui_data;
[764c7d1]	652
[ad2d8bc]	653	otr_save(irc);
[764c7d1]	654	}
	655
	656	void op_gone_secure(void opdata, ConnContext context)
	657	{
	658	struct im_connection *ic =
[5ebff60]	659	check_imc(opdata, context->accountname, context->protocol);
[ad2d8bc]	660	irc_user_t *u;
	661	irc_t *irc = ic->bee->ui_data;
[764c7d1]	662
[ad2d8bc]	663	u = peeruser(irc, context->username, context->protocol);
[5ebff60]	664	if (!u) {
[5a71d9c]	665	log_message(LOGLVL_ERROR,
[5ebff60]	666	"BUG: otr.c: op_gone_secure: irc_user_t for %s/%s/%s not found!",
	667	context->username, context->protocol, context->accountname);
[5a71d9c]	668	return;
	669	}
[5ebff60]	670
[a0c6fc5]	671	otr_update_uflags(context, u);
[5ebff60]	672	if (!otr_update_modeflags(irc, u)) {
[f1cf01c]	673	char *trust = u->flags & IRC_USER_OTR_TRUSTED ? "trusted" : "untrusted!";
[409c2de]	674	irc_usernotice(u, "conversation is now off the record (%s)", trust);
[f1cf01c]	675	}
[764c7d1]	676	}
	677
	678	void op_gone_insecure(void opdata, ConnContext context)
	679	{
	680	struct im_connection *ic =
[5ebff60]	681	check_imc(opdata, context->accountname, context->protocol);
[ad2d8bc]	682	irc_t *irc = ic->bee->ui_data;
	683	irc_user_t *u;
[764c7d1]	684
[ad2d8bc]	685	u = peeruser(irc, context->username, context->protocol);
[5ebff60]	686	if (!u) {
[5a71d9c]	687	log_message(LOGLVL_ERROR,
[5ebff60]	688	"BUG: otr.c: op_gone_insecure: irc_user_t for %s/%s/%s not found!",
	689	context->username, context->protocol, context->accountname);
[5a71d9c]	690	return;
	691	}
[a0c6fc5]	692	otr_update_uflags(context, u);
[5ebff60]	693	if (!otr_update_modeflags(irc, u)) {
[409c2de]	694	irc_usernotice(u, "conversation is now in cleartext");
[5ebff60]	695	}
[764c7d1]	696	}
	697
	698	void op_still_secure(void opdata, ConnContext context, int is_reply)
	699	{
	700	struct im_connection *ic =
[5ebff60]	701	check_imc(opdata, context->accountname, context->protocol);
[ad2d8bc]	702	irc_t *irc = ic->bee->ui_data;
	703	irc_user_t *u;
[764c7d1]	704
[ad2d8bc]	705	u = peeruser(irc, context->username, context->protocol);
[5ebff60]	706	if (!u) {
[5a71d9c]	707	log_message(LOGLVL_ERROR,
[5ebff60]	708	"BUG: otr.c: op_still_secure: irc_user_t for %s/%s/%s not found!",
	709	context->username, context->protocol, context->accountname);
[5a71d9c]	710	return;
	711	}
[a0c6fc5]	712
	713	otr_update_uflags(context, u);
[5ebff60]	714	if (!otr_update_modeflags(irc, u)) {
[f1cf01c]	715	char *trust = u->flags & IRC_USER_OTR_TRUSTED ? "trusted" : "untrusted!";
[409c2de]	716	irc_usernotice(u, "otr connection has been refreshed (%s)", trust);
[f1cf01c]	717	}
[764c7d1]	718	}
	719
[a13855a]	720	int op_max_message_size(void opdata, ConnContext context)
	721	{
[5a71d9c]	722	struct im_connection *ic =
[5ebff60]	723	check_imc(opdata, context->accountname, context->protocol);
	724
[5a71d9c]	725	return ic->acc->prpl->mms;
[a13855a]	726	}
	727
	728	const char op_account_name(void opdata, const char account, const char protocol)
	729	{
[5ebff60]	730	struct im_connection ic = (struct im_connection ) opdata;
[ad2d8bc]	731	irc_t *irc = ic->bee->ui_data;
[a13855a]	732
[ad2d8bc]	733	return peernick(irc, account, protocol);
[a13855a]	734	}
	735
[e65039a]	736	void op_create_instag(void opdata, const char account, const char *protocol)
	737	{
	738	struct im_connection *ic =
[5ebff60]	739	check_imc(opdata, account, protocol);
[e65039a]	740	irc_t *irc = ic->bee->ui_data;
	741	gcry_error_t e;
	742	char s[512];
[5ebff60]	743
[e65039a]	744	g_snprintf(s, 511, "%s%s.otr_instags", global.conf->configdir,
[5ebff60]	745	irc->user->nick);
[e65039a]	746	e = otrl_instag_generate(irc->otr->us, s, account, protocol);
[5ebff60]	747	if (e) {
[e65039a]	748	irc_rootmsg(irc, "otr: %s/%s: otrl_instag_generate failed: %s",
[5ebff60]	749	account, protocol, gcry_strerror(e));
[e65039a]	750	}
	751	}
	752
[47ab9a9]	753	static char otr_filter_colors(char msg)
	754	{
	755	return str_reject_chars(msg, "\x02\x03", '?');
[86fd261]	756	}
	757
[654112d4]	758	/* returns newly allocated string */
	759	static char otr_color_encrypted(char msg, char *color, gboolean is_query) {
	760	char **lines;
	761	GString *out;
	762	int i;
	763
	764	lines = g_strsplit(msg, "\n", -1);
	765
	766	/* up to 4 extra chars per line (e.g., '\x03' + ("03"\|"05") + ' ') */
	767	out = g_string_sized_new(strlen(msg) + g_strv_length(lines) * 4);
	768
	769	for (i = 0; lines[i]; i++) {
	770	char *line = lines[i];
	771
	772	if (i != 0) {
	773	g_string_append_c(out, '\n');
	774
	775	} else if (is_query && g_strncasecmp(line, "/me ", 4) == 0) {
	776	/* in a query window, keep "/me " uncolored at the beginning */
	777	line += 4;
	778	g_string_append(out, "/me ");
	779	}
	780
	781	g_string_append_c(out, '\x03');
	782	g_string_append(out, color);
	783
	784	/* comma in first place could mess with the color code */
	785	if (line[0] == ',') {
	786	/* insert a space between color spec and message */
	787	g_string_append_c(out, ' ');
	788	}
	789
[86fd261]	790	g_string_append(out, otr_filter_colors(line));
[654112d4]	791	}
	792
	793	g_strfreev(lines);
	794
	795	return g_string_free(out, FALSE);
	796	}
	797
[5d2bc9d]	798	void op_convert_msg(void opdata, ConnContext ctx, OtrlConvertType typ,
[5ebff60]	799	char *dst, const char src)
[5d2bc9d]	800	{
	801	struct im_connection *ic =
[5ebff60]	802	check_imc(opdata, ctx->accountname, ctx->protocol);
[5d2bc9d]	803	irc_t *irc = ic->bee->ui_data;
	804	irc_user_t *iu = peeruser(irc, ctx->username, ctx->protocol);
	805
[5ebff60]	806	if (typ == OTRL_CONVERT_RECEIVING) {
[5d2bc9d]	807	char *msg = g_strdup(src);
	808
	809	/* HTML decoding */
[5ebff60]	810	if (set_getbool(&ic->bee->set, "otr_does_html") &&
	811	!(ic->flags & OPT_DOES_HTML) &&
	812	set_getbool(&ic->bee->set, "strip_html")) {
[5d2bc9d]	813	strip_html(msg);
[654112d4]	814
	815	/* msg is borrowed by dst (unless the next if decides to color it) /
[5d2bc9d]	816	*dst = msg;
	817	}
	818
	819	/* coloring */
[5ebff60]	820	if (set_getbool(&ic->bee->set, "otr_color_encrypted")) {
[5d2bc9d]	821	const char *trust = ctx->active_fingerprint->trust;
[654112d4]	822	char color = (trust && trust) ? OTR_COLOR_TRUSTED : OTR_COLOR_UNTRUSTED;
	823	gboolean is_query = (irc_user_msgdest(iu) == irc->user->nick);
[5d2bc9d]	824
[654112d4]	825	/* the return value of otr_color_encrypted() is borrowed by dst /
	826	*dst = otr_color_encrypted(msg, color, is_query);
[5d2bc9d]	827
[654112d4]	828	/* this branch doesn't need msg */
	829	g_free(msg);
[5d2bc9d]	830	}
	831	} else {
	832	/* HTML encoding */
	833	/* consider OTR plaintext to be HTML if otr_does_html is set */
[5ebff60]	834	if (ctx && ctx->msgstate == OTRL_MSGSTATE_ENCRYPTED &&
	835	set_getbool(&ic->bee->set, "otr_does_html") &&
	836	(g_strncasecmp(src, "<html>", 6) != 0)) {
[5d2bc9d]	837	*dst = escape_html(src);
	838	}
	839	}
	840	}
	841
	842	void op_convert_free(void opdata, ConnContext ctx, char *msg)
	843	{
	844	g_free(msg);
	845	}
[5ebff60]	846
[352a6b0]	847	/* Socialist Millionaires' Protocol */
	848	void op_handle_smp_event(void opdata, OtrlSMPEvent ev, ConnContext ctx,
[5ebff60]	849	unsigned short percent, char *question)
[352a6b0]	850	{
	851	struct im_connection *ic =
[5ebff60]	852	check_imc(opdata, ctx->accountname, ctx->protocol);
[352a6b0]	853	irc_t *irc = ic->bee->ui_data;
	854	OtrlUserState us = irc->otr->us;
	855	irc_user_t *u = peeruser(irc, ctx->username, ctx->protocol);
	856
[5ebff60]	857	if (!u) {
	858	return;
	859	}
[352a6b0]	860
[5ebff60]	861	switch (ev) {
[352a6b0]	862	case OTRL_SMPEVENT_ASK_FOR_SECRET:
	863	irc_rootmsg(irc, "smp: initiated by %s"
[5ebff60]	864	" - respond with \x02otr smp %s <secret>\x02",
	865	u->nick, u->nick);
[352a6b0]	866	break;
	867	case OTRL_SMPEVENT_ASK_FOR_ANSWER:
	868	irc_rootmsg(irc, "smp: initiated by %s with question: \x02\"%s\"\x02", u->nick,
[5ebff60]	869	question);
[352a6b0]	870	irc_rootmsg(irc, "smp: respond with \x02otr smp %s <answer>\x02",
[5ebff60]	871	u->nick);
[352a6b0]	872	break;
	873	case OTRL_SMPEVENT_CHEATED:
	874	irc_rootmsg(irc, "smp %s: opponent violated protocol, aborting",
[5ebff60]	875	u->nick);
[352a6b0]	876	otrl_message_abort_smp(us, &otr_ops, u->bu->ic, ctx);
	877	otrl_sm_state_free(ctx->smstate);
	878	break;
	879	case OTRL_SMPEVENT_NONE:
	880	break;
	881	case OTRL_SMPEVENT_IN_PROGRESS:
	882	break;
	883	case OTRL_SMPEVENT_SUCCESS:
[5ebff60]	884	if (ctx->smstate->received_question) {
[352a6b0]	885	irc_rootmsg(irc, "smp %s: correct answer, you are trusted",
[5ebff60]	886	u->nick);
[352a6b0]	887	} else {
	888	irc_rootmsg(irc, "smp %s: secrets proved equal, fingerprint trusted",
[5ebff60]	889	u->nick);
[352a6b0]	890	}
	891	otrl_sm_state_free(ctx->smstate);
	892	break;
	893	case OTRL_SMPEVENT_FAILURE:
[5ebff60]	894	if (ctx->smstate->received_question) {
[352a6b0]	895	irc_rootmsg(irc, "smp %s: wrong answer, you are not trusted",
[5ebff60]	896	u->nick);
[352a6b0]	897	} else {
	898	irc_rootmsg(irc, "smp %s: secrets did not match, fingerprint not trusted",
[5ebff60]	899	u->nick);
[352a6b0]	900	}
	901	otrl_sm_state_free(ctx->smstate);
	902	break;
	903	case OTRL_SMPEVENT_ABORT:
[5ebff60]	904	irc_rootmsg(irc, "smp: received abort from %s", u->nick);
[352a6b0]	905	otrl_sm_state_free(ctx->smstate);
	906	break;
	907	case OTRL_SMPEVENT_ERROR:
	908	irc_rootmsg(irc, "smp %s: protocol error, aborting",
[5ebff60]	909	u->nick);
[352a6b0]	910	otrl_message_abort_smp(us, &otr_ops, u->bu->ic, ctx);
	911	otrl_sm_state_free(ctx->smstate);
	912	break;
	913	}
	914	}
	915
[090c9b7]	916	void op_handle_msg_event(void opdata, OtrlMessageEvent ev, ConnContext ctx,
[5ebff60]	917	const char *message, gcry_error_t err)
[090c9b7]	918	{
[5ebff60]	919	switch (ev) {
[090c9b7]	920	case OTRL_MSGEVENT_ENCRYPTION_REQUIRED:
	921	display_otr_message(opdata, ctx,
[5ebff60]	922	"policy requires encryption - message not sent");
[090c9b7]	923	break;
	924	case OTRL_MSGEVENT_ENCRYPTION_ERROR:
	925	display_otr_message(opdata, ctx,
[5ebff60]	926	"error during encryption - message not sent");
[090c9b7]	927	break;
	928	case OTRL_MSGEVENT_CONNECTION_ENDED:
	929	display_otr_message(opdata, ctx,
[5ebff60]	930	"other end has disconnected OTR - "
	931	"close connection or reconnect!");
[090c9b7]	932	break;
	933	case OTRL_MSGEVENT_SETUP_ERROR:
	934	display_otr_message(opdata, ctx,
[5ebff60]	935	"OTR connection failed: %s", gcry_strerror(err));
[090c9b7]	936	break;
	937	case OTRL_MSGEVENT_MSG_REFLECTED:
	938	display_otr_message(opdata, ctx,
[5ebff60]	939	"received our own OTR message (!?)");
[090c9b7]	940	break;
	941	case OTRL_MSGEVENT_MSG_RESENT:
	942	display_otr_message(opdata, ctx,
[5ebff60]	943	"the previous message was resent");
[090c9b7]	944	break;
	945	case OTRL_MSGEVENT_RCVDMSG_NOT_IN_PRIVATE:
	946	display_otr_message(opdata, ctx,
[5ebff60]	947	"unexpected encrypted message received");
[090c9b7]	948	break;
	949	case OTRL_MSGEVENT_RCVDMSG_UNREADABLE:
	950	display_otr_message(opdata, ctx,
[5ebff60]	951	"unreadable encrypted message received");
[090c9b7]	952	break;
	953	case OTRL_MSGEVENT_RCVDMSG_MALFORMED:
	954	display_otr_message(opdata, ctx,
[5ebff60]	955	"malformed OTR message received");
[090c9b7]	956	break;
[51f937e]	957	case OTRL_MSGEVENT_LOG_HEARTBEAT_RCVD:
[5ebff60]	958	if (global.conf->verbose) {
[51f937e]	959	log_otr_message(opdata, "%s/%s: heartbeat received",
[5ebff60]	960	ctx->accountname, ctx->protocol);
[51f937e]	961	}
	962	break;
	963	case OTRL_MSGEVENT_LOG_HEARTBEAT_SENT:
[5ebff60]	964	if (global.conf->verbose) {
[51f937e]	965	log_otr_message(opdata, "%s/%s: heartbeat sent",
[5ebff60]	966	ctx->accountname, ctx->protocol);
[51f937e]	967	}
	968	break;
[090c9b7]	969	case OTRL_MSGEVENT_RCVDMSG_GENERAL_ERR:
	970	display_otr_message(opdata, ctx,
[5ebff60]	971	"OTR error message received: %s", message);
[090c9b7]	972	break;
	973	case OTRL_MSGEVENT_RCVDMSG_UNENCRYPTED:
	974	display_otr_message(opdata, ctx,
[5ebff60]	975	"unencrypted message received: %s", message);
[090c9b7]	976	break;
	977	case OTRL_MSGEVENT_RCVDMSG_UNRECOGNIZED:
	978	display_otr_message(opdata, ctx,
[5ebff60]	979	"unrecognized OTR message received");
[090c9b7]	980	break;
[e4752a6]	981	case OTRL_MSGEVENT_RCVDMSG_FOR_OTHER_INSTANCE:
	982	display_otr_message(opdata, ctx,
[5ebff60]	983	"OTR message for a different instance received");
[e4752a6]	984	break;
[090c9b7]	985	default:
[51f937e]	986	/* shouldn't happen */
[090c9b7]	987	break;
	988	}
	989	}
	990
[6d9f0ba]	991	const char op_otr_error_message(void opdata, ConnContext *ctx,
[5ebff60]	992	OtrlErrorCode err_code)
[6d9f0ba]	993	{
[5ebff60]	994	switch (err_code) {
[6d9f0ba]	995	case OTRL_ERRCODE_ENCRYPTION_ERROR:
	996	return "i failed to encrypt a message";
	997	case OTRL_ERRCODE_MSG_NOT_IN_PRIVATE:
	998	return "you sent an encrypted message i didn't expect";
	999	case OTRL_ERRCODE_MSG_UNREADABLE:
	1000	return "could not read encrypted message";
	1001	case OTRL_ERRCODE_MSG_MALFORMED:
	1002	return "you sent a malformed OTR message";
	1003	default:
	1004	return "i suffered an unexpected OTR error";
	1005	}
	1006	}
	1007
[5d2bc9d]	1008
[764c7d1]	1009
	1010	/* OTR sub-command handlers */
	1011
[69ef042]	1012	void cmd_otr_reconnect(irc_t irc, char *args)
	1013	{
	1014	cmd_otr_disconnect(irc, args);
	1015	cmd_otr_connect(irc, args);
	1016	}
	1017
[8521b02]	1018	void cmd_otr_disconnect(irc_t irc, char *args)
[764c7d1]	1019	{
[ad2d8bc]	1020	irc_user_t *u;
[764c7d1]	1021
[5ebff60]	1022	if (!strcmp("*", args[1])) {
[c239fff]	1023	otr_disconnect_all(irc);
	1024	irc_rootmsg(irc, "all conversations are now in cleartext");
	1025	} else {
	1026	u = irc_user_by_name(irc, args[1]);
[5ebff60]	1027	if (otr_disconnect_user(irc, u)) {
[c239fff]	1028	irc_usernotice(u, "conversation is now in cleartext");
[5ebff60]	1029	} else {
[c239fff]	1030	irc_rootmsg(irc, "%s: unknown user", args[1]);
[5ebff60]	1031	}
[c595308]	1032	}
[764c7d1]	1033	}
	1034
[8521b02]	1035	void cmd_otr_connect(irc_t irc, char *args)
[764c7d1]	1036	{
[ad2d8bc]	1037	irc_user_t *u;
[820a2a7]	1038	char msg, query = "?OTR?";
[764c7d1]	1039
[ad2d8bc]	1040	u = irc_user_by_name(irc, args[1]);
[5ebff60]	1041	if (!u \|\| !u->bu \|\| !u->bu->ic) {
[e67e513]	1042	irc_rootmsg(irc, "%s: unknown user", args[1]);
[764c7d1]	1043	return;
	1044	}
[5ebff60]	1045	if (!(u->bu->flags & BEE_USER_ONLINE)) {
[e67e513]	1046	irc_rootmsg(irc, "%s is offline", args[1]);
[764c7d1]	1047	return;
	1048	}
[5ebff60]	1049
[fbcb481]	1050	/* passing this through the filter so it goes through libotr which
	1051	* will replace the simple query string with a proper one */
[820a2a7]	1052	msg = otr_filter_msg_out(u, query, 0);
	1053
	1054	/* send the message */
[5ebff60]	1055	if (msg) {
[820a2a7]	1056	u->bu->ic->acc->prpl->buddy_msg(u->bu->ic, u->bu->handle, msg, 0); /* XXX flags? */
	1057	/* XXX error message? */
	1058
[5ebff60]	1059	if (msg != query) {
[820a2a7]	1060	g_free(msg);
[5ebff60]	1061	}
[820a2a7]	1062	}
[764c7d1]	1063	}
	1064
[5a71d9c]	1065	void cmd_otr_smp(irc_t irc, char *args)
[764c7d1]	1066	{
[5ebff60]	1067	otr_smp_or_smpq(irc, args[1], NULL, args[2]); /* no question */
[99a01b9]	1068	}
[764c7d1]	1069
[99a01b9]	1070	void cmd_otr_smpq(irc_t irc, char *args)
	1071	{
[7c91392]	1072	otr_smp_or_smpq(irc, args[1], args[2], args[3]);
[764c7d1]	1073	}
	1074
[5a71d9c]	1075	void cmd_otr_trust(irc_t irc, char *args)
	1076	{
[ad2d8bc]	1077	irc_user_t *u;
[5a71d9c]	1078	ConnContext *ctx;
	1079	unsigned char raw[20];
	1080	Fingerprint *fp;
[5ebff60]	1081	int i, j;
	1082
[ad2d8bc]	1083	u = irc_user_by_name(irc, args[1]);
[5ebff60]	1084	if (!u \|\| !u->bu \|\| !u->bu->ic) {
[e67e513]	1085	irc_rootmsg(irc, "%s: unknown user", args[1]);
[5a71d9c]	1086	return;
	1087	}
[5ebff60]	1088
[ad2d8bc]	1089	ctx = otrl_context_find(irc->otr->us, u->bu->handle,
[5ebff60]	1090	u->bu->ic->acc->user, u->bu->ic->acc->prpl->name, OTRL_INSTAG_MASTER, 0, NULL, NULL,
	1091	NULL);
	1092	if (!ctx) {
[e67e513]	1093	irc_rootmsg(irc, "%s: no otr context with user", args[1]);
[5a71d9c]	1094	return;
	1095	}
[5ebff60]	1096
[5a71d9c]	1097	/* convert given fingerprint to raw representation */
[5ebff60]	1098	for (i = 0; i < 5; i++) {
	1099	for (j = 0; j < 4; j++) {
	1100	char p = args[2 + i] + (2 j);
	1101	char *q = p + 1;
[5a71d9c]	1102	int x, y;
[5ebff60]	1103
	1104	if (!p \|\| !q) {
	1105	irc_rootmsg(irc, "failed: truncated fingerprint block %d", i + 1);
[5a71d9c]	1106	return;
	1107	}
[5ebff60]	1108
[5a71d9c]	1109	x = hexval(*p);
	1110	y = hexval(*q);
[5ebff60]	1111	if (x < 0) {
	1112	irc_rootmsg(irc, "failed: %d. hex digit of block %d out of range", 2 * j + 1, i + 1);
[5a71d9c]	1113	return;
	1114	}
[5ebff60]	1115	if (y < 0) {
	1116	irc_rootmsg(irc, "failed: %d. hex digit of block %d out of range", 2 * j + 2, i + 1);
[5a71d9c]	1117	return;
	1118	}
	1119
[5ebff60]	1120	raw[i * 4 + j] = x * 16 + y;
[5a71d9c]	1121	}
	1122	}
	1123	fp = otrl_context_find_fingerprint(ctx, raw, 0, NULL);
[5ebff60]	1124	if (!fp) {
[e67e513]	1125	irc_rootmsg(irc, "failed: no such fingerprint for %s", args[1]);
[5a71d9c]	1126	} else {
	1127	char *trust = args[7] ? args[7] : "affirmed";
	1128	otrl_context_set_trust(fp, trust);
[e67e513]	1129	irc_rootmsg(irc, "fingerprint match, trust set to \"%s\"", trust);
[5ebff60]	1130	if (u->flags & IRC_USER_OTR_ENCRYPTED) {
[ad2d8bc]	1131	u->flags \|= IRC_USER_OTR_TRUSTED;
[5ebff60]	1132	}
[5a71d9c]	1133	otr_update_modeflags(irc, u);
	1134	}
	1135	}
	1136
[8521b02]	1137	void cmd_otr_info(irc_t irc, char *args)
[764c7d1]	1138	{
[5ebff60]	1139	if (!args[1]) {
[8521b02]	1140	show_general_otr_info(irc);
[764c7d1]	1141	} else {
[8521b02]	1142	char *arg = g_strdup(args[1]);
[5ebff60]	1143	char myhandle, handle = NULL, *protocol;
[2c81d15]	1144	ConnContext bestctx = NULL, ctx;
[5ebff60]	1145
[8521b02]	1146	/* interpret arg as 'user/protocol/account' if possible */
	1147	protocol = strchr(arg, '/');
[9e64011]	1148	myhandle = NULL;
[5ebff60]	1149	if (protocol) {
[8521b02]	1150	*(protocol++) = '\0';
	1151	myhandle = strchr(protocol, '/');
[764c7d1]	1152	}
[5ebff60]	1153	if (protocol && myhandle) {
[8521b02]	1154	*(myhandle++) = '\0';
	1155	handle = arg;
[5ebff60]	1156	ctx = otrl_context_find(irc->otr->us, handle, myhandle, protocol, OTRL_INSTAG_MASTER, 0, NULL,
	1157	NULL, NULL);
	1158	if (!ctx) {
[e67e513]	1159	irc_rootmsg(irc, "no such context");
[8521b02]	1160	g_free(arg);
	1161	return;
	1162	}
[764c7d1]	1163	} else {
[ad2d8bc]	1164	irc_user_t *u = irc_user_by_name(irc, args[1]);
[5ebff60]	1165	if (!u \|\| !u->bu \|\| !u->bu->ic) {
[e67e513]	1166	irc_rootmsg(irc, "%s: unknown user", args[1]);
[8521b02]	1167	g_free(arg);
	1168	return;
[5a71d9c]	1169	}
[ad2d8bc]	1170	ctx = otrl_context_find(irc->otr->us, u->bu->handle, u->bu->ic->acc->user,
[5ebff60]	1171	u->bu->ic->acc->prpl->name, OTRL_INSTAG_MASTER, 0, NULL, NULL, NULL);
	1172	if (!ctx) {
[e67e513]	1173	irc_rootmsg(irc, "no otr context with %s", args[1]);
[8521b02]	1174	g_free(arg);
	1175	return;
	1176	}
[2c81d15]	1177	/* This does no harm if it returns NULL */
	1178	bestctx = otrl_context_find(irc->otr->us, u->bu->handle, u->bu->ic->acc->user,
	1179	u->bu->ic->acc->prpl->name, OTRL_INSTAG_BEST, 0, NULL, NULL, NULL);
[8521b02]	1180	}
[5ebff60]	1181
[8521b02]	1182	/* show how we resolved the (nick) argument, if we did */
[5ebff60]	1183	if (handle != arg) {
[2c81d15]	1184	irc_rootmsg(irc, "%s:", args[1]);
	1185	irc_rootmsg(irc, " they are: %s/%s", ctx->username, ctx->protocol);
	1186	irc_rootmsg(irc, " we are: %s/%s", ctx->accountname, ctx->protocol);
[764c7d1]	1187	}
[2c81d15]	1188	show_otr_context_info(irc, ctx, bestctx);
[8521b02]	1189	g_free(arg);
[764c7d1]	1190	}
	1191	}
	1192
[94e7eb3]	1193	void cmd_otr_keygen(irc_t irc, char *args)
	1194	{
	1195	account_t *a;
[5ebff60]	1196
[eabe6d4]	1197	if ((a = account_get(irc->b, args[1])) == NULL) {
	1198	irc_rootmsg(irc, "Could not find account `%s'.", args[1]);
[94e7eb3]	1199	return;
	1200	}
[5ebff60]	1201
	1202	if (keygen_in_progress(irc, a->user, a->prpl->name)) {
[eabe6d4]	1203	irc_rootmsg(irc, "keygen for account `%s' already in progress", a->tag);
[dc9797f]	1204	return;
	1205	}
[5ebff60]	1206
	1207	if (otrl_privkey_find(irc->otr->us, a->user, a->prpl->name)) {
[eabe6d4]	1208	char *s = g_strdup_printf("account `%s' already has a key, replace it?", a->tag);
[ad2d8bc]	1209	query_add(irc, NULL, s, yes_keygen, NULL, NULL, a);
[82e8fe8]	1210	g_free(s);
[94e7eb3]	1211	} else {
	1212	otr_keygen(irc, a->user, a->prpl->name);
	1213	}
	1214	}
	1215
[6738a67]	1216	void yes_forget_fingerprint(void *data)
[c595308]	1217	{
[5ebff60]	1218	pair_t p = (pair_t ) data;
	1219	irc_t irc = (irc_t ) p->fst;
	1220	Fingerprint fp = (Fingerprint ) p->snd;
[6738a67]	1221
	1222	g_free(p);
[5ebff60]	1223
	1224	if (fp == fp->context->active_fingerprint) {
[e67e513]	1225	irc_rootmsg(irc, "that fingerprint is active, terminate otr connection first");
[c595308]	1226	return;
	1227	}
[5ebff60]	1228
[c595308]	1229	otrl_context_forget_fingerprint(fp, 0);
	1230	}
	1231
[6738a67]	1232	void yes_forget_context(void *data)
[c595308]	1233	{
[5ebff60]	1234	pair_t p = (pair_t ) data;
	1235	irc_t irc = (irc_t ) p->fst;
	1236	ConnContext ctx = (ConnContext ) p->snd;
[6738a67]	1237
	1238	g_free(p);
[f93e01c]	1239
	1240	// XXX forget all contexts
[5ebff60]	1241
	1242	if (ctx->msgstate == OTRL_MSGSTATE_ENCRYPTED) {
[e67e513]	1243	irc_rootmsg(irc, "active otr connection with %s, terminate it first",
[5ebff60]	1244	peernick(irc, ctx->username, ctx->protocol));
[c595308]	1245	return;
	1246	}
[5ebff60]	1247
	1248	if (ctx->msgstate == OTRL_MSGSTATE_FINISHED) {
[c595308]	1249	otrl_context_force_plaintext(ctx);
[5ebff60]	1250	}
[c595308]	1251	otrl_context_forget(ctx);
	1252	}
	1253
[6738a67]	1254	void yes_forget_key(void *data)
[d0faf62]	1255	{
[5ebff60]	1256	OtrlPrivKey key = (OtrlPrivKey ) data;
	1257
[d0faf62]	1258	otrl_privkey_forget(key);
[37bff51]	1259	/* Hm, libotr doesn't seem to offer a function for explicitly /writing/
	1260	keyfiles. So the key will be back on the next load... */
	1261	/* TODO: Actually erase forgotten keys from storage? */
[d0faf62]	1262	}
	1263
[c595308]	1264	void cmd_otr_forget(irc_t irc, char *args)
	1265	{
[5ebff60]	1266	if (!strcmp(args[1], "fingerprint")) {
[ad2d8bc]	1267	irc_user_t *u;
[c595308]	1268	ConnContext *ctx;
	1269	Fingerprint *fp;
	1270	char human[54];
	1271	char *s;
[6738a67]	1272	pair_t *p;
[5ebff60]	1273
	1274	if (!args[3]) {
[e67e513]	1275	irc_rootmsg(irc, "otr %s %s: not enough arguments (2 req.)", args[0], args[1]);
[c595308]	1276	return;
	1277	}
[5ebff60]	1278
[e2b15bb]	1279	/* TODO: allow context specs ("user/proto/account") in 'otr forget fingerprint'? */
[ad2d8bc]	1280	u = irc_user_by_name(irc, args[2]);
[5ebff60]	1281	if (!u \|\| !u->bu \|\| !u->bu->ic) {
[e67e513]	1282	irc_rootmsg(irc, "%s: unknown user", args[2]);
[c595308]	1283	return;
	1284	}
[5ebff60]	1285
[ad2d8bc]	1286	ctx = otrl_context_find(irc->otr->us, u->bu->handle, u->bu->ic->acc->user,
[5ebff60]	1287	u->bu->ic->acc->prpl->name, OTRL_INSTAG_MASTER, 0, NULL, NULL, NULL);
	1288	if (!ctx) {
[e67e513]	1289	irc_rootmsg(irc, "no otr context with %s", args[2]);
[c595308]	1290	return;
	1291	}
[5ebff60]	1292
	1293	fp = match_fingerprint(irc, ctx, ((const char **) args) + 3);
	1294	if (!fp) {
[c595308]	1295	/* match_fingerprint does error messages */
	1296	return;
	1297	}
[5ebff60]	1298
	1299	if (fp == ctx->active_fingerprint) {
[e67e513]	1300	irc_rootmsg(irc, "that fingerprint is active, terminate otr connection first");
[c595308]	1301	return;
	1302	}
[5ebff60]	1303
[c595308]	1304	otrl_privkey_hash_to_human(human, fp->fingerprint);
	1305	s = g_strdup_printf("about to forget fingerprint %s, are you sure?", human);
[6738a67]	1306	p = g_malloc(sizeof(pair_t));
[5ebff60]	1307	if (!p) {
[6738a67]	1308	return;
[5ebff60]	1309	}
[6738a67]	1310	p->fst = irc;
	1311	p->snd = fp;
[ad2d8bc]	1312	query_add(irc, NULL, s, yes_forget_fingerprint, NULL, NULL, p);
[82e8fe8]	1313	g_free(s);
[5ebff60]	1314	} else if (!strcmp(args[1], "context")) {
[ad2d8bc]	1315	irc_user_t *u;
[c595308]	1316	ConnContext *ctx;
	1317	char *s;
[6738a67]	1318	pair_t *p;
[5ebff60]	1319
[e2b15bb]	1320	/* TODO: allow context specs ("user/proto/account") in 'otr forget contex'? */
[ad2d8bc]	1321	u = irc_user_by_name(irc, args[2]);
[5ebff60]	1322	if (!u \|\| !u->bu \|\| !u->bu->ic) {
[e67e513]	1323	irc_rootmsg(irc, "%s: unknown user", args[2]);
[c595308]	1324	return;
	1325	}
[5ebff60]	1326
[ad2d8bc]	1327	ctx = otrl_context_find(irc->otr->us, u->bu->handle, u->bu->ic->acc->user,
[5ebff60]	1328	u->bu->ic->acc->prpl->name, OTRL_INSTAG_MASTER, 0, NULL, NULL, NULL);
	1329	if (!ctx) {
[e67e513]	1330	irc_rootmsg(irc, "no otr context with %s", args[2]);
[c595308]	1331	return;
	1332	}
[5ebff60]	1333
	1334	if (ctx->msgstate == OTRL_MSGSTATE_ENCRYPTED) {
[e67e513]	1335	irc_rootmsg(irc, "active otr connection with %s, terminate it first", args[2]);
[c595308]	1336	return;
	1337	}
[5ebff60]	1338
[c595308]	1339	s = g_strdup_printf("about to forget otr data about %s, are you sure?", args[2]);
[6738a67]	1340	p = g_malloc(sizeof(pair_t));
[5ebff60]	1341	if (!p) {
[6738a67]	1342	return;
[5ebff60]	1343	}
[6738a67]	1344	p->fst = irc;
	1345	p->snd = ctx;
[ad2d8bc]	1346	query_add(irc, NULL, s, yes_forget_context, NULL, NULL, p);
[82e8fe8]	1347	g_free(s);
[5ebff60]	1348	} else if (!strcmp(args[1], "key")) {
[d0faf62]	1349	OtrlPrivKey *key;
	1350	char *s;
[5ebff60]	1351
	1352	key = match_privkey(irc, ((const char **) args) + 2);
	1353	if (!key) {
[d0faf62]	1354	/* match_privkey does error messages */
	1355	return;
	1356	}
[5ebff60]	1357
[d0faf62]	1358	s = g_strdup_printf("about to forget the private key for %s/%s, are you sure?",
[5ebff60]	1359	key->accountname, key->protocol);
[ad2d8bc]	1360	query_add(irc, NULL, s, yes_forget_key, NULL, NULL, key);
[d0faf62]	1361	g_free(s);
[5ebff60]	1362	} else {
[e67e513]	1363	irc_rootmsg(irc, "otr %s: unknown subcommand \"%s\", see \x02help otr forget\x02",
[5ebff60]	1364	args[0], args[1]);
[c595308]	1365	}
	1366	}
	1367
[764c7d1]	1368
	1369	/* local helpers / subroutines: */
	1370
[090c9b7]	1371	void log_otr_message(void opdata, const char fmt, ...)
	1372	{
	1373	va_list va;
	1374
	1375	va_start(va, fmt);
	1376	char *msg = g_strdup_vprintf(fmt, va);
	1377	va_end(va);
[5ebff60]	1378
[090c9b7]	1379	log_message(LOGLVL_INFO, "otr: %s", msg);
[098a75b]	1380
	1381	g_free(msg);
[090c9b7]	1382	}
	1383
	1384	void display_otr_message(void opdata, ConnContext ctx, const char *fmt, ...)
	1385	{
	1386	struct im_connection *ic =
[5ebff60]	1387	check_imc(opdata, ctx->accountname, ctx->protocol);
[090c9b7]	1388	irc_t *irc = ic->bee->ui_data;
	1389	irc_user_t *u = peeruser(irc, ctx->username, ctx->protocol);
	1390	va_list va;
	1391
	1392	va_start(va, fmt);
	1393	char *msg = g_strdup_vprintf(fmt, va);
	1394	va_end(va);
	1395
[5ebff60]	1396	if (u) {
[0a5d03c]	1397	/* just show this as a regular message */
	1398	irc_usermsg(u, "<<\002OTR\002>> %s", msg);
[090c9b7]	1399	} else {
	1400	irc_rootmsg(irc, "[otr] %s", msg);
	1401	}
	1402
	1403	g_free(msg);
	1404	}
	1405
[99a01b9]	1406	/* combined handler for the 'otr smp' and 'otr smpq' commands */
[7c91392]	1407	void otr_smp_or_smpq(irc_t irc, const char nick, const char *question,
[5ebff60]	1408	const char *secret)
[99a01b9]	1409	{
	1410	irc_user_t *u;
	1411	ConnContext *ctx;
[329f9fe]	1412	otrl_instag_t instag = OTRL_INSTAG_BEST; // XXX
[99a01b9]	1413
	1414	u = irc_user_by_name(irc, nick);
[5ebff60]	1415	if (!u \|\| !u->bu \|\| !u->bu->ic) {
[e67e513]	1416	irc_rootmsg(irc, "%s: unknown user", nick);
[99a01b9]	1417	return;
	1418	}
[5ebff60]	1419	if (!(u->bu->flags & BEE_USER_ONLINE)) {
[e67e513]	1420	irc_rootmsg(irc, "%s is offline", nick);
[99a01b9]	1421	return;
	1422	}
[5ebff60]	1423
[99a01b9]	1424	ctx = otrl_context_find(irc->otr->us, u->bu->handle,
[5ebff60]	1425	u->bu->ic->acc->user, u->bu->ic->acc->prpl->name, instag, 0, NULL, NULL, NULL);
	1426	if (!ctx \|\| ctx->msgstate != OTRL_MSGSTATE_ENCRYPTED) {
[e67e513]	1427	irc_rootmsg(irc, "smp: otr inactive with %s, try \x02otr connect"
[5ebff60]	1428	" %s\x02", nick, nick);
[99a01b9]	1429	return;
	1430	}
	1431
[5ebff60]	1432	if (ctx->smstate->nextExpected != OTRL_SMP_EXPECT1) {
[99a01b9]	1433	log_message(LOGLVL_INFO,
[5ebff60]	1434	"SMP already in phase %d, sending abort before reinitiating",
	1435	ctx->smstate->nextExpected + 1);
[99a01b9]	1436	otrl_message_abort_smp(irc->otr->us, &otr_ops, u->bu->ic, ctx);
	1437	otrl_sm_state_free(ctx->smstate);
	1438	}
[944d7a5]	1439
[5ebff60]	1440	if (question) {
[9cc653c]	1441	/* this was 'otr smpq', just initiate */
[e67e513]	1442	irc_rootmsg(irc, "smp: initiating with %s...", u->nick);
[9cc653c]	1443	otrl_message_initiate_smp_q(irc->otr->us, &otr_ops, u->bu->ic, ctx,
[5ebff60]	1444	question, (unsigned char *) secret, strlen(secret));
[9cc653c]	1445	/* smp is now in EXPECT2 */
	1446	} else {
	1447	/* this was 'otr smp', initiate or reply */
	1448	/* warning: the following assumes that smstates are cleared whenever an SMP
[5ebff60]	1449	is completed or aborted! */
	1450	if (ctx->smstate->secret == NULL) {
[e67e513]	1451	irc_rootmsg(irc, "smp: initiating with %s...", u->nick);
[99a01b9]	1452	otrl_message_initiate_smp(irc->otr->us, &otr_ops,
[5ebff60]	1453	u->bu->ic, ctx, (unsigned char *) secret, strlen(secret));
[9cc653c]	1454	/* smp is now in EXPECT2 */
	1455	} else {
	1456	/* if we're still in EXPECT1 but smstate is initialized, we must have
	1457	received the SMP1, so let's issue a response */
[e67e513]	1458	irc_rootmsg(irc, "smp: responding to %s...", u->nick);
[9cc653c]	1459	otrl_message_respond_smp(irc->otr->us, &otr_ops,
[5ebff60]	1460	u->bu->ic, ctx, (unsigned char *) secret, strlen(secret));
[9cc653c]	1461	/* smp is now in EXPECT3 */
[99a01b9]	1462	}
	1463	}
	1464	}
	1465
[22ec21d]	1466	/* timeout handler that calls otrl_message_poll */
	1467	gboolean ev_message_poll(gpointer data, gint fd, b_input_condition cond)
	1468	{
	1469	otr_t *otr = data;
	1470
[5ebff60]	1471	if (otr && otr->us) {
[c347a12]	1472	otrl_message_poll(otr->us, &otr_ops, NULL);
[5ebff60]	1473	}
[22ec21d]	1474
[5ebff60]	1475	return TRUE; /* cycle timer */
[22ec21d]	1476	}
	1477
[764c7d1]	1478	/* helper to assert that account and protocol names given to ops below always
	1479	match the im_connection passed through as opdata */
	1480	struct im_connection check_imc(void opdata, const char *accountname,
[5ebff60]	1481	const char *protocol)
[764c7d1]	1482	{
[5ebff60]	1483	struct im_connection ic = (struct im_connection ) opdata;
[764c7d1]	1484
[fa9478e]	1485	/* libotr 4.0.0 has a bug where it doesn't set opdata, so we catch
	1486	* that and try to find the desired connection in the global list. */
[5ebff60]	1487	if (!ic) {
[fa9478e]	1488	GSList *l;
[5ebff60]	1489	for (l = get_connections(); l; l = l->next) {
[fa9478e]	1490	ic = l->data;
[5ebff60]	1491	if (strcmp(accountname, ic->acc->user) == 0 &&
	1492	strcmp(protocol, ic->acc->prpl->name) == 0) {
[fa9478e]	1493	break;
[5ebff60]	1494	}
[fa9478e]	1495	}
	1496	assert(l != NULL); /* a match should always be found */
[5ebff60]	1497	if (!l) {
[37ed402]	1498	return NULL;
[5ebff60]	1499	}
[fa9478e]	1500	}
	1501
[764c7d1]	1502	if (strcmp(accountname, ic->acc->user) != 0) {
	1503	log_message(LOGLVL_WARNING,
[5ebff60]	1504	"otr: internal account name mismatch: '%s' vs '%s'",
	1505	accountname, ic->acc->user);
[764c7d1]	1506	}
	1507	if (strcmp(protocol, ic->acc->prpl->name) != 0) {
	1508	log_message(LOGLVL_WARNING,
[5ebff60]	1509	"otr: internal protocol name mismatch: '%s' vs '%s'",
	1510	protocol, ic->acc->prpl->name);
[764c7d1]	1511	}
[5ebff60]	1512
[764c7d1]	1513	return ic;
	1514	}
	1515
[ad2d8bc]	1516	irc_user_t peeruser(irc_t irc, const char handle, const char protocol)
[764c7d1]	1517	{
[ad2d8bc]	1518	GSList *l;
[5ebff60]	1519
	1520	for (l = irc->b->users; l; l = l->next) {
[ad2d8bc]	1521	bee_user_t *bu = l->data;
[764c7d1]	1522	struct prpl *prpl;
[5ebff60]	1523	if (!bu->ui_data \|\| !bu->ic \|\| !bu->handle) {
[8521b02]	1524	continue;
[5ebff60]	1525	}
[ad2d8bc]	1526	prpl = bu->ic->acc->prpl;
[5ebff60]	1527	if (strcmp(prpl->name, protocol) == 0
	1528	&& prpl->handle_cmp(bu->handle, handle) == 0) {
[ad2d8bc]	1529	return bu->ui_data;
[764c7d1]	1530	}
	1531	}
[5ebff60]	1532
[5a71d9c]	1533	return NULL;
	1534	}
	1535
[8521b02]	1536	int hexval(char a)
	1537	{
[5ebff60]	1538	int x = g_ascii_tolower(a);
	1539
	1540	if (x >= 'a' && x <= 'f') {
[8521b02]	1541	x = x - 'a' + 10;
[5ebff60]	1542	} else if (x >= '0' && x <= '9') {
[8521b02]	1543	x = x - '0';
[5ebff60]	1544	} else {
[8521b02]	1545	return -1;
[5ebff60]	1546	}
	1547
[8521b02]	1548	return x;
	1549	}
	1550
[5a71d9c]	1551	const char peernick(irc_t irc, const char handle, const char protocol)
	1552	{
	1553	static char fallback[512];
[5ebff60]	1554
[ad2d8bc]	1555	irc_user_t *u = peeruser(irc, handle, protocol);
[5ebff60]	1556
	1557	if (u) {
[5a71d9c]	1558	return u->nick;
	1559	} else {
	1560	g_snprintf(fallback, 511, "%s/%s", handle, protocol);
	1561	return fallback;
	1562	}
	1563	}
	1564
[a0c6fc5]	1565	void otr_update_uflags(ConnContext context, irc_user_t u)
	1566	{
	1567	const char *trust;
	1568
[5ebff60]	1569	if (context->active_fingerprint) {
[a0c6fc5]	1570	u->flags \|= IRC_USER_OTR_ENCRYPTED;
	1571
	1572	trust = context->active_fingerprint->trust;
[5ebff60]	1573	if (trust && trust[0]) {
[a0c6fc5]	1574	u->flags \|= IRC_USER_OTR_TRUSTED;
[5ebff60]	1575	} else {
[a0c6fc5]	1576	u->flags &= ~IRC_USER_OTR_TRUSTED;
[5ebff60]	1577	}
[a0c6fc5]	1578	} else {
	1579	u->flags &= ~IRC_USER_OTR_ENCRYPTED;
	1580	}
	1581	}
	1582
[ad2d8bc]	1583	int otr_update_modeflags(irc_t irc, irc_user_t u)
[5a71d9c]	1584	{
[1dc00fe]	1585	return 0;
[764c7d1]	1586	}
	1587
	1588	void show_fingerprints(irc_t irc, ConnContext ctx)
	1589	{
	1590	char human[45];
	1591	Fingerprint *fp;
	1592	const char *trust;
[5ebff60]	1593	int count = 0;
	1594
[2c81d15]	1595	/* Is this a subcontext? If so, only list the active fingerprint */
	1596	if (ctx->m_context != ctx) {
	1597	fp = ctx->active_fingerprint;
	1598	} else {
	1599	fp = &ctx->fingerprint_root;
	1600	}
	1601
	1602	while (fp) {
[5ebff60]	1603	if (!fp->fingerprint) {
[2c81d15]	1604	fp = fp->next;
[764c7d1]	1605	continue;
[5ebff60]	1606	}
[764c7d1]	1607	count++;
	1608	otrl_privkey_hash_to_human(human, fp->fingerprint);
[5ebff60]	1609	if (!fp->trust \|\| fp->trust[0] == '\0') {
	1610	trust = "untrusted";
[764c7d1]	1611	} else {
[5ebff60]	1612	trust = fp->trust;
[764c7d1]	1613	}
[5ebff60]	1614	if (fp == ctx->active_fingerprint) {
[2c81d15]	1615	irc_rootmsg(irc, " \x02%s (%s)\x02", human, trust);
[764c7d1]	1616	} else {
[2c81d15]	1617	irc_rootmsg(irc, " %s (%s)", human, trust);
[764c7d1]	1618	}
[2c81d15]	1619
	1620	/* Break if this is a subcontext - we only print active fp */
	1621	if (ctx->m_context != ctx) {
	1622	break;
	1623	}
	1624	fp = fp->next;
[764c7d1]	1625	}
[5ebff60]	1626	if (count == 0) {
[2c81d15]	1627	irc_rootmsg(irc, " (none)");
[5ebff60]	1628	}
[8521b02]	1629	}
	1630
[c595308]	1631	Fingerprint match_fingerprint(irc_t irc, ConnContext ctx, const char *args)
	1632	{
	1633	Fingerprint fp, fp2;
	1634	char human[45];
	1635	char prefix[45], *p;
	1636	int n;
[5ebff60]	1637	int i, j;
	1638
[c595308]	1639	/* assemble the args into a prefix in standard "human" form */
[5ebff60]	1640	n = 0;
	1641	p = prefix;
	1642	for (i = 0; args[i]; i++) {
	1643	for (j = 0; args[i][j]; j++) {
[6b13103]	1644	char c = g_ascii_toupper(args[i][j]);
[5ebff60]	1645
	1646	if (n >= 40) {
[e67e513]	1647	irc_rootmsg(irc, "too many fingerprint digits given, expected at most 40");
[c595308]	1648	return NULL;
	1649	}
[5ebff60]	1650
	1651	if ((c >= 'A' && c <= 'F') \|\| (c >= '0' && c <= '9')) {
[c595308]	1652	*(p++) = c;
	1653	} else {
[5ebff60]	1654	irc_rootmsg(irc, "invalid hex digit '%c' in block %d", args[i][j], i + 1);
[c595308]	1655	return NULL;
	1656	}
[5ebff60]	1657
[c595308]	1658	n++;
[5ebff60]	1659	if (n % 8 == 0) {
[c595308]	1660	*(p++) = ' ';
[5ebff60]	1661	}
[c595308]	1662	}
	1663	}
	1664	*p = '\0';
[5ebff60]	1665
[c595308]	1666	/* find first fingerprint with the given prefix */
	1667	n = strlen(prefix);
[5ebff60]	1668	for (fp = &ctx->fingerprint_root; fp; fp = fp->next) {
	1669	if (!fp->fingerprint) {
[c595308]	1670	continue;
[5ebff60]	1671	}
[c595308]	1672	otrl_privkey_hash_to_human(human, fp->fingerprint);
[5ebff60]	1673	if (!strncmp(prefix, human, n)) {
[c595308]	1674	break;
[5ebff60]	1675	}
[c595308]	1676	}
[5ebff60]	1677	if (!fp) {
[e67e513]	1678	irc_rootmsg(irc, "%s: no match", prefix);
[c595308]	1679	return NULL;
	1680	}
[5ebff60]	1681
[c595308]	1682	/* make sure the match, if any, is unique */
[5ebff60]	1683	for (fp2 = fp->next; fp2; fp2 = fp2->next) {
	1684	if (!fp2->fingerprint) {
[c595308]	1685	continue;
[5ebff60]	1686	}
[c595308]	1687	otrl_privkey_hash_to_human(human, fp2->fingerprint);
[5ebff60]	1688	if (!strncmp(prefix, human, n)) {
[c595308]	1689	break;
[5ebff60]	1690	}
[c595308]	1691	}
[5ebff60]	1692	if (fp2) {
[e67e513]	1693	irc_rootmsg(irc, "%s: multiple matches", prefix);
[c595308]	1694	return NULL;
	1695	}
[5ebff60]	1696
[c595308]	1697	return fp;
	1698	}
	1699
[5f4eede]	1700	OtrlPrivKey match_privkey(irc_t irc, const char **args)
	1701	{
	1702	OtrlPrivKey k, k2;
	1703	char human[45];
	1704	char prefix[45], *p;
	1705	int n;
[5ebff60]	1706	int i, j;
	1707
[5f4eede]	1708	/* assemble the args into a prefix in standard "human" form */
[5ebff60]	1709	n = 0;
	1710	p = prefix;
	1711	for (i = 0; args[i]; i++) {
	1712	for (j = 0; args[i][j]; j++) {
[6b13103]	1713	char c = g_ascii_toupper(args[i][j]);
[5ebff60]	1714
	1715	if (n >= 40) {
[e67e513]	1716	irc_rootmsg(irc, "too many fingerprint digits given, expected at most 40");
[5f4eede]	1717	return NULL;
	1718	}
[5ebff60]	1719
	1720	if ((c >= 'A' && c <= 'F') \|\| (c >= '0' && c <= '9')) {
[5f4eede]	1721	*(p++) = c;
	1722	} else {
[5ebff60]	1723	irc_rootmsg(irc, "invalid hex digit '%c' in block %d", args[i][j], i + 1);
[5f4eede]	1724	return NULL;
	1725	}
[5ebff60]	1726
[5f4eede]	1727	n++;
[5ebff60]	1728	if (n % 8 == 0) {
[5f4eede]	1729	*(p++) = ' ';
[5ebff60]	1730	}
[5f4eede]	1731	}
	1732	}
	1733	*p = '\0';
[5ebff60]	1734
[0b1ae59]	1735	/* remove trailing whitespace */
	1736	g_strchomp(prefix);
	1737
[5f4eede]	1738	/* find first key which matches the given prefix */
	1739	n = strlen(prefix);
[5ebff60]	1740	for (k = irc->otr->us->privkey_root; k; k = k->next) {
[dc9797f]	1741	p = otrl_privkey_fingerprint(irc->otr->us, human, k->accountname, k->protocol);
[5ebff60]	1742	if (!p) { /* gah! :-P */
[5f4eede]	1743	continue;
[5ebff60]	1744	}
	1745	if (!strncmp(prefix, human, n)) {
[5f4eede]	1746	break;
[5ebff60]	1747	}
[5f4eede]	1748	}
[5ebff60]	1749	if (!k) {
[e67e513]	1750	irc_rootmsg(irc, "%s: no match", prefix);
[5f4eede]	1751	return NULL;
	1752	}
[5ebff60]	1753
[5f4eede]	1754	/* make sure the match, if any, is unique */
[5ebff60]	1755	for (k2 = k->next; k2; k2 = k2->next) {
[dc9797f]	1756	p = otrl_privkey_fingerprint(irc->otr->us, human, k2->accountname, k2->protocol);
[5ebff60]	1757	if (!p) { /* gah! :-P */
[5f4eede]	1758	continue;
[5ebff60]	1759	}
	1760	if (!strncmp(prefix, human, n)) {
[5f4eede]	1761	break;
[5ebff60]	1762	}
[5f4eede]	1763	}
[5ebff60]	1764	if (k2) {
[e67e513]	1765	irc_rootmsg(irc, "%s: multiple matches", prefix);
[5f4eede]	1766	return NULL;
	1767	}
[5ebff60]	1768
[5f4eede]	1769	return k;
	1770	}
	1771
[8521b02]	1772	void show_general_otr_info(irc_t *irc)
	1773	{
	1774	ConnContext *ctx;
	1775	OtrlPrivKey *key;
	1776	char human[45];
[3064ea4]	1777	kg_t *kg;
[8521b02]	1778
[3064ea4]	1779	/* list all privkeys (including ones being generated) */
[e67e513]	1780	irc_rootmsg(irc, "\x1fprivate keys:\x1f");
[5ebff60]	1781	for (key = irc->otr->us->privkey_root; key; key = key->next) {
[8521b02]	1782	const char *hash;
[5ebff60]	1783
	1784	switch (key->pubkey_type) {
[8521b02]	1785	case OTRL_PUBKEY_TYPE_DSA:
[e67e513]	1786	irc_rootmsg(irc, " %s/%s - DSA", key->accountname, key->protocol);
[8521b02]	1787	break;
	1788	default:
[e67e513]	1789	irc_rootmsg(irc, " %s/%s - type %d", key->accountname, key->protocol,
[5ebff60]	1790	key->pubkey_type);
[8521b02]	1791	}
	1792
	1793	/* No, it doesn't make much sense to search for the privkey again by
	1794	account/protocol, but libotr currently doesn't provide a direct routine
	1795	for hashing a given 'OtrlPrivKey'... */
[dc9797f]	1796	hash = otrl_privkey_fingerprint(irc->otr->us, human, key->accountname, key->protocol);
[5ebff60]	1797	if (hash) { /* should always succeed */
[e67e513]	1798	irc_rootmsg(irc, " %s", human);
[5ebff60]	1799	}
[8521b02]	1800	}
[5ebff60]	1801	if (irc->otr->sent_accountname) {
[e67e513]	1802	irc_rootmsg(irc, " %s/%s - DSA", irc->otr->sent_accountname,
[5ebff60]	1803	irc->otr->sent_protocol);
[e67e513]	1804	irc_rootmsg(irc, " (being generated)");
[1221ef0]	1805	}
[5ebff60]	1806	for (kg = irc->otr->todo; kg; kg = kg->next) {
[e67e513]	1807	irc_rootmsg(irc, " %s/%s - DSA", kg->accountname, kg->protocol);
	1808	irc_rootmsg(irc, " (queued)");
[3064ea4]	1809	}
[5ebff60]	1810	if (key == irc->otr->us->privkey_root &&
	1811	!irc->otr->sent_accountname &&
	1812	kg == irc->otr->todo) {
[e67e513]	1813	irc_rootmsg(irc, " (none)");
[5ebff60]	1814	}
[8521b02]	1815
	1816	/* list all contexts */
[e4752a6]	1817	/* XXX remove this, or split off as its own command */
[e67e513]	1818	irc_rootmsg(irc, "%s", "");
	1819	irc_rootmsg(irc, "\x1f" "connection contexts:\x1f (bold=currently encrypted)");
[2c81d15]	1820
	1821	ctx = irc->otr->us->context_root;
	1822	while (ctx) {
	1823	ConnContext *subctx;
[ad2d8bc]	1824	irc_user_t *u;
[8521b02]	1825	char *userstring;
[2c81d15]	1826	char encrypted = 0;
[5ebff60]	1827
[8521b02]	1828	u = peeruser(irc, ctx->username, ctx->protocol);
[5ebff60]	1829	if (u) {
[8521b02]	1830	userstring = g_strdup_printf("%s/%s/%s (%s)",
[5ebff60]	1831	ctx->username, ctx->protocol, ctx->accountname, u->nick);
	1832	} else {
[8521b02]	1833	userstring = g_strdup_printf("%s/%s/%s",
[5ebff60]	1834	ctx->username, ctx->protocol, ctx->accountname);
	1835	}
	1836
[2c81d15]	1837	subctx = ctx;
	1838	while (subctx && subctx->m_context == ctx) {
	1839	if (subctx->msgstate == OTRL_MSGSTATE_ENCRYPTED) {
	1840	encrypted = 1;
	1841	}
	1842	subctx = subctx->next;
	1843	}
	1844
	1845	if(encrypted) {
[e67e513]	1846	irc_rootmsg(irc, " \x02%s\x02", userstring);
[8521b02]	1847	} else {
[e67e513]	1848	irc_rootmsg(irc, " %s", userstring);
[8521b02]	1849	}
[5ebff60]	1850
[2c81d15]	1851	/* Skip subcontexts/instances from output */
	1852	ctx = subctx;
	1853
[8521b02]	1854	g_free(userstring);
	1855	}
[2c81d15]	1856
[5ebff60]	1857	if (ctx == irc->otr->us->context_root) {
[e67e513]	1858	irc_rootmsg(irc, " (none)");
[5ebff60]	1859	}
[8521b02]	1860	}
	1861
[2c81d15]	1862	void show_otr_context_info(irc_t irc, ConnContext ctx, ConnContext *bestctx)
[8521b02]	1863	{
[2c81d15]	1864	ConnContext *subctx;
	1865	int instcount = 0;
	1866
	1867	subctx = ctx;
	1868	while (subctx && subctx->m_context == ctx) {
	1869	if (subctx->m_context == subctx) {
	1870	if (subctx == bestctx) {
	1871	irc_rootmsg(irc, " \x02master context (target):\x02");
	1872	} else {
	1873	irc_rootmsg(irc, " master context:");
	1874	}
	1875	irc_rootmsg(irc, " known fingerprints (bold = active for v1 or v2):");
	1876	} else {
	1877	if (subctx == bestctx) {
	1878	irc_rootmsg(irc, " \x02instance %d (target):\x02", instcount);
	1879	} else {
	1880	irc_rootmsg(irc, " instance %d:", instcount);
	1881	}
	1882	irc_rootmsg(irc, " active fingerprint:");
	1883	instcount++;
	1884	}
[f93e01c]	1885
[2c81d15]	1886	show_fingerprints(irc, subctx);
[8521b02]	1887
[2c81d15]	1888	switch (subctx->msgstate) {
	1889	case OTRL_MSGSTATE_PLAINTEXT:
	1890	irc_rootmsg(irc, " connection state: cleartext");
	1891	break;
	1892	case OTRL_MSGSTATE_ENCRYPTED:
	1893	irc_rootmsg(irc, " connection state: encrypted (v%d)", subctx->protocol_version);
	1894	break;
	1895	case OTRL_MSGSTATE_FINISHED:
	1896	irc_rootmsg(irc, " connection state: shut down");
	1897	break;
	1898	default:
	1899	irc_rootmsg(irc, " connection state: %d", subctx->msgstate);
	1900	}
[8521b02]	1901
[2c81d15]	1902	subctx = subctx->next;
	1903	}
[764c7d1]	1904	}
	1905
[dc9797f]	1906	int keygen_in_progress(irc_t irc, const char handle, const char *protocol)
	1907	{
	1908	kg_t *kg;
[5ebff60]	1909
	1910	if (!irc->otr->sent_accountname \|\| !irc->otr->sent_protocol) {
[dc9797f]	1911	return 0;
[5ebff60]	1912	}
[dc9797f]	1913
	1914	/* are we currently working on this key? */
[5ebff60]	1915	if (!strcmp(handle, irc->otr->sent_accountname) &&
	1916	!strcmp(protocol, irc->otr->sent_protocol)) {
[dc9797f]	1917	return 1;
[5ebff60]	1918	}
	1919
[dc9797f]	1920	/* do we have it queued for later? */
[5ebff60]	1921	for (kg = irc->otr->todo; kg; kg = kg->next) {
	1922	if (!strcmp(handle, kg->accountname) &&
	1923	!strcmp(protocol, kg->protocol)) {
[dc9797f]	1924	return 1;
[5ebff60]	1925	}
[dc9797f]	1926	}
[5ebff60]	1927
[dc9797f]	1928	return 0;
	1929	}
	1930
[764c7d1]	1931	void otr_keygen(irc_t irc, const char handle, const char *protocol)
	1932	{
[dc9797f]	1933	/* do nothing if a key for the requested account is already being generated */
[5ebff60]	1934	if (keygen_in_progress(irc, handle, protocol)) {
[dc9797f]	1935	return;
[5ebff60]	1936	}
[764c7d1]	1937
[522a00f]	1938	/* see if we already have a keygen child running. if not, start one and put a
[27db433]	1939	handler on its output. */
[5ebff60]	1940	if (!irc->otr->keygen \|\| waitpid(irc->otr->keygen, NULL, WNOHANG)) {
[27db433]	1941	pid_t p;
	1942	int to[2], from[2];
	1943	FILE tof, fromf;
[5ebff60]	1944
	1945	if (pipe(to) < 0 \|\| pipe(from) < 0) {
[e67e513]	1946	irc_rootmsg(irc, "otr keygen: couldn't create pipe: %s", strerror(errno));
[27db433]	1947	return;
	1948	}
[5ebff60]	1949
[27db433]	1950	tof = fdopen(to[1], "w");
	1951	fromf = fdopen(from[0], "r");
[5ebff60]	1952	if (!tof \|\| !fromf) {
[e67e513]	1953	irc_rootmsg(irc, "otr keygen: couldn't streamify pipe: %s", strerror(errno));
[27db433]	1954	return;
	1955	}
[5ebff60]	1956
[27db433]	1957	p = fork();
[5ebff60]	1958	if (p < 0) {
[e67e513]	1959	irc_rootmsg(irc, "otr keygen: couldn't fork: %s", strerror(errno));
[27db433]	1960	return;
	1961	}
[5ebff60]	1962
	1963	if (!p) {
[27db433]	1964	/* child process */
	1965	signal(SIGTERM, exit);
[12cc58b]	1966	keygen_child_main(irc->otr->us, to[0], from[1]);
[27db433]	1967	exit(0);
	1968	}
[5ebff60]	1969
[dc9797f]	1970	irc->otr->keygen = p;
	1971	irc->otr->to = tof;
	1972	irc->otr->from = fromf;
	1973	irc->otr->sent_accountname = NULL;
	1974	irc->otr->sent_protocol = NULL;
	1975	irc->otr->todo = NULL;
[ad2d8bc]	1976	b_input_add(from[0], B_EV_IO_READ, keygen_finish_handler, irc);
[27db433]	1977	}
[5ebff60]	1978
[dc9797f]	1979	/* is the keygen slave currently working? */
[5ebff60]	1980	if (irc->otr->sent_accountname) {
[dc9797f]	1981	/* enqueue our job for later transmission */
	1982	kg_t **kg = &irc->otr->todo;
[5ebff60]	1983	while (*kg) {
	1984	kg = &((*kg)->next);
	1985	}
[dc9797f]	1986	*kg = g_new0(kg_t, 1);
[ba5add7]	1987	(*kg)->accountname = g_strdup(handle);
	1988	(*kg)->protocol = g_strdup(protocol);
[dc9797f]	1989	} else {
	1990	/* send our job over and remember it */
	1991	fprintf(irc->otr->to, "%s\n%s\n", handle, protocol);
	1992	fflush(irc->otr->to);
[ba5add7]	1993	irc->otr->sent_accountname = g_strdup(handle);
	1994	irc->otr->sent_protocol = g_strdup(protocol);
[dc9797f]	1995	}
[27db433]	1996	}
[522a00f]	1997
[12cc58b]	1998	void keygen_child_main(OtrlUserState us, int infd, int outfd)
[27db433]	1999	{
	2000	FILE input, output;
	2001	char filename[128], accountname[512], protocol[512];
	2002	gcry_error_t e;
	2003	int tempfd;
[5ebff60]	2004
[27db433]	2005	input = fdopen(infd, "r");
	2006	output = fdopen(outfd, "w");
[5ebff60]	2007
	2008	while (!feof(input) && !ferror(input) && !feof(output) && !ferror(output)) {
[27db433]	2009	myfgets(accountname, 512, input);
	2010	myfgets(protocol, 512, input);
[5ebff60]	2011
[27db433]	2012	strncpy(filename, "/tmp/bitlbee-XXXXXX", 128);
	2013	tempfd = mkstemp(filename);
	2014	close(tempfd);
	2015
	2016	e = otrl_privkey_generate(us, filename, accountname, protocol);
[5ebff60]	2017	if (e) {
[27db433]	2018	fprintf(output, "\n"); /* this means failure */
	2019	fprintf(output, "otr keygen: %s\n", gcry_strerror(e));
	2020	unlink(filename);
	2021	} else {
	2022	fprintf(output, "%s\n", filename);
	2023	fprintf(output, "otr keygen for %s/%s complete\n", accountname, protocol);
	2024	}
	2025	fflush(output);
	2026	}
[5ebff60]	2027
[27db433]	2028	fclose(input);
	2029	fclose(output);
[764c7d1]	2030	}
	2031
	2032	gboolean keygen_finish_handler(gpointer data, gint fd, b_input_condition cond)
	2033	{
[5ebff60]	2034	irc_t irc = (irc_t ) data;
[27db433]	2035	char filename[512], msg[512];
	2036
[dc9797f]	2037	myfgets(filename, 512, irc->otr->from);
	2038	myfgets(msg, 512, irc->otr->from);
[5ebff60]	2039
[e67e513]	2040	irc_rootmsg(irc, "%s", msg);
[5ebff60]	2041	if (filename[0]) {
	2042	if (strsane(irc->user->nick)) {
[c7b94ef]	2043	char *kf = g_strdup_printf("%s%s.otr_keys", global.conf->configdir, irc->user->nick);
	2044	char *tmp = g_strdup_printf("%s.new", kf);
	2045	copyfile(filename, tmp);
	2046	unlink(filename);
[5ebff60]	2047	rename(tmp, kf);
[c7b94ef]	2048	otrl_privkey_read(irc->otr->us, kf);
	2049	g_free(kf);
	2050	g_free(tmp);
	2051	} else {
	2052	otrl_privkey_read(irc->otr->us, filename);
	2053	unlink(filename);
	2054	}
[27db433]	2055	}
[5ebff60]	2056
[dc9797f]	2057	/* forget this job */
[ba5add7]	2058	g_free(irc->otr->sent_accountname);
	2059	g_free(irc->otr->sent_protocol);
[dc9797f]	2060	irc->otr->sent_accountname = NULL;
	2061	irc->otr->sent_protocol = NULL;
[5ebff60]	2062
[dc9797f]	2063	/* see if there are any more in the queue */
[5ebff60]	2064	if (irc->otr->todo) {
[dc9797f]	2065	kg_t *p = irc->otr->todo;
	2066	/* send the next one over */
	2067	fprintf(irc->otr->to, "%s\n%s\n", p->accountname, p->protocol);
	2068	fflush(irc->otr->to);
	2069	irc->otr->sent_accountname = p->accountname;
	2070	irc->otr->sent_protocol = p->protocol;
	2071	irc->otr->todo = p->next;
	2072	g_free(p);
	2073	return TRUE; /* keep watching */
	2074	} else {
	2075	/* okay, the slave is idle now, so kill him */
	2076	fclose(irc->otr->from);
	2077	fclose(irc->otr->to);
[2dcaf9a]	2078	irc->otr->from = irc->otr->to = NULL;
[dc9797f]	2079	kill(irc->otr->keygen, SIGTERM);
	2080	waitpid(irc->otr->keygen, NULL, 0);
	2081	irc->otr->keygen = 0;
[27db433]	2082	return FALSE; /* unregister ourselves */
	2083	}
	2084	}
	2085
	2086	void copyfile(const char a, const char b)
	2087	{
	2088	int fda, fdb;
	2089	int n;
	2090	char buf[1024];
[5ebff60]	2091
[27db433]	2092	fda = open(a, O_RDONLY);
	2093	fdb = open(b, O_WRONLY \| O_CREAT \| O_TRUNC, 0600);
[5ebff60]	2094
	2095	while ((n = read(fda, buf, 1024)) > 0) {
[27db433]	2096	write(fdb, buf, n);
[5ebff60]	2097	}
	2098
[27db433]	2099	close(fda);
[5ebff60]	2100	close(fdb);
[27db433]	2101	}
	2102
	2103	void myfgets(char s, int size, FILE stream)
	2104	{
[5ebff60]	2105	if (!fgets(s, size, stream)) {
[27db433]	2106	s[0] = '\0';
	2107	} else {
	2108	int n = strlen(s);
[5ebff60]	2109	if (n > 0 && s[n - 1] == '\n') {
	2110	s[n - 1] = '\0';
	2111	}
[27db433]	2112	}
[764c7d1]	2113	}
	2114
[6738a67]	2115	void yes_keygen(void *data)
[764c7d1]	2116	{
[5ebff60]	2117	account_t acc = (account_t ) data;
[ad2d8bc]	2118	irc_t *irc = acc->bee->ui_data;
[5ebff60]	2119
	2120	if (keygen_in_progress(irc, acc->user, acc->prpl->name)) {
[e67e513]	2121	irc_rootmsg(irc, "keygen for %s/%s already in progress",
[5ebff60]	2122	acc->user, acc->prpl->name);
[dc9797f]	2123	} else {
[e67e513]	2124	irc_rootmsg(irc, "starting background keygen for %s/%s",
[5ebff60]	2125	acc->user, acc->prpl->name);
[e67e513]	2126	irc_rootmsg(irc, "you will be notified when it completes");
[ad2d8bc]	2127	otr_keygen(irc, acc->user, acc->prpl->name);
[dc9797f]	2128	}
[764c7d1]	2129	}
[3231485]	2130
[c7b94ef]	2131	/* check whether a string is safe to use in a path component */
	2132	int strsane(const char *s)
	2133	{
	2134	return strpbrk(s, "/\\") == NULL;
	2135	}
	2136
[c239fff]	2137	/* close the OTR connection with the given buddy */
	2138	gboolean otr_disconnect_user(irc_t irc, irc_user_t u)
	2139	{
[5ebff60]	2140	if (!u \|\| !u->bu \|\| !u->bu->ic) {
[c239fff]	2141	return FALSE;
[5ebff60]	2142	}
[c239fff]	2143
	2144	/* XXX we disconnect all instances; is that what we want? */
	2145	otrl_message_disconnect_all_instances(irc->otr->us, &otr_ops,
[5ebff60]	2146	u->bu->ic, u->bu->ic->acc->user, u->bu->ic->acc->prpl->name,
	2147	u->bu->handle);
	2148
[c239fff]	2149	u->flags &= ~IRC_USER_OTR_TRUSTED;
	2150	u->flags &= ~IRC_USER_OTR_ENCRYPTED;
	2151	otr_update_modeflags(irc, u);
	2152
	2153	return TRUE;
	2154	}
	2155
	2156	/* close all active OTR connections */
	2157	void otr_disconnect_all(irc_t *irc)
	2158	{
	2159	irc_user_t *u;
	2160	ConnContext *ctx;
	2161
[5ebff60]	2162	for (ctx = irc->otr->us->context_root; ctx; ctx = ctx->next) {
	2163	if (ctx->msgstate == OTRL_MSGSTATE_ENCRYPTED) {
[c239fff]	2164	u = peeruser(irc, ctx->username, ctx->protocol);
	2165	(void) otr_disconnect_user(irc, u);
	2166	}
	2167	}
	2168	}

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