otr.h

/*
 * Off-the-Record Messaging (OTR) module for the irssi IRC client
 * Copyright (C) 2008  Uli Meis <a.sporto+bee@gmail.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,USA
 */

#include <stdlib.h>
#include <unistd.h>
#include <errno.h>

/* OTR */

#include <libotr/proto.h>
#include <libotr/context.h>
#include <libotr/message.h>
#include <libotr/privkey.h>

/* glib */

#include <glib.h>
#include <glib/gprintf.h>
#include <glib/gstdio.h>

/* irssi */

#ifdef TARGET_IRSSI
#include <irssi_otr.h>
#endif

/* xchat */

#ifdef TARGET_XCHAT
#include <xchat_otr.h>
#endif

/* log stuff */

#define LOGMAX 1024

#define LVL_NOTICE  0
#define LVL_DEBUG   1

#define otr_logst(level,format,...) \
	otr_log(NULL,NULL,level,format, ## __VA_ARGS__)

void otr_log(IRC_CTX *server, const char *to, 
	     int level, const char *format, ...);

/* own */

#include "io-config.h"

/* irssi module name */
#define MODULE_NAME "otr"

#include "otr-formats.h"

/* 
 * maybe this should be configurable?
 * I believe bitlbee has something >500.
 */
#define OTR_MAX_MSG_SIZE 400

/* otr protocol id */
#define PROTOCOLID "IRC"

#define KEYFILE    "/otr/otr.key"
#define TMPKEYFILE "/otr/otr.key.tmp"
#define FPSFILE    "/otr/otr.fp"

/* some defaults */
#define IO_DEFAULT_POLICY "*@localhost opportunistic,*bitlbee* opportunistic,*@im.* opportunistic, *serv@irc* never"
#define IO_DEFAULT_POLICY_KNOWN "* always"
#define IO_DEFAULT_IGNORE "xmlconsole[0-9]*"

/* one for each OTR context (=communication pair) */
struct co_info {
	char *msgqueue;			/* holds partially reconstructed base64
					   messages */
	IRC_CTX *ircctx;		/* irssi server object for this peer */
	int received_smp_init;		/* received SMP init msg */
	int smp_failed;			/* last SMP failed */
	char better_msg_two[256];	/* what the second line of the "better"
					   default query msg should like. Eat it
					   up when it comes in */
	int finished;			/* true after you've /otr finished */
};

/* these are returned by /otr contexts */

struct fplist_ {
	char *fp;
	enum { NOAUTH,AUTHSMP,AUTHMAN } authby;
	struct fplist_ *next;
};

struct ctxlist_ {
	char *username;
	char *accountname;
	enum { STUNENCRYPTED,STENCRYPTED,STFINISHED,STUNKNOWN } state;
	struct fplist_ *fplist;
	struct ctxlist_ *next;
};

/* policy list generated from /set otr_policy */

struct plistentry {
	GPatternSpec *namepat;
	OtrlPolicy policy;
};

/* used by the logging functions below */
extern int debug;

void irc_send_message(IRC_CTX *ircctx, const char *recipient, char *msg);
IRC_CTX *server_find_address(char *address);

/* init stuff */

int otrlib_init();
void otrlib_deinit();
void otr_initops();
void otr_setpolicies(const char *policies, int known);

/* basic send/receive/status stuff */

char *otr_send(IRC_CTX *server,const char *msg,const char *to);
char *otr_receive(IRC_CTX *server,const char *msg,const char *from);
int otr_getstatus(char *mynick, char *nick, char *server);
ConnContext *otr_getcontext(const char *accname,const char *nick,int create,void *data);

/* user interaction */

void otr_trust(IRC_CTX *server, char *nick, const char *peername);
void otr_finish(IRC_CTX *server, char *nick, const char *peername, int inquery);
void otr_auth(IRC_CTX *server, char *nick, const char *peername, const char *secret);
void otr_authabort(IRC_CTX *server, char *nick, const char *peername);
struct ctxlist_ *otr_contexts();
void otr_finishall();


/* key/fingerprint stuff */

void keygen_run(const char *accname);
void keygen_abort();
void key_load();
void fps_load();
void otr_writefps();