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/*
* otrlibv3.c
* vim: expandtab:ts=4:sts=4:sw=4
*
* Copyright (C) 2012 - 2019 James Booth <boothj5@gmail.com>
*
* This file is part of Profanity.
*
* Profanity 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 3 of the License, or
* (at your option) any later version.
*
* Profanity 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 Profanity. If not, see <https://www.gnu.org/licenses/>.
*
* In addition, as a special exception, the copyright holders give permission to
* link the code of portions of this program with the OpenSSL library under
* certain conditions as described in each individual source file, and
* distribute linked combinations including the two.
*
* You must obey the GNU General Public License in all respects for all of the
* code used other than OpenSSL. If you modify file(s) with this exception, you
* may extend this exception to your version of the file(s), but you are not
* obligated to do so. If you do not wish to do so, delete this exception
* statement from your version. If you delete this exception statement from all
* source files in the program, then also delete it here.
*
*/
#include <libotr/proto.h>
#include <libotr/privkey.h>
#include <libotr/message.h>
#include "otr/otr.h"
#include "otr/otrlib.h"
#include "ui/ui.h"
#include "ui/window_list.h"
OtrlPolicy
otrlib_policy(void)
{
return OTRL_POLICY_ALLOW_V1 | OTRL_POLICY_ALLOW_V2 ;
}
void
otrlib_init_timer(void)
{
}
void
otrlib_poll(void)
{
}
char*
otrlib_start_query(void)
{
return "?OTR?v2? This user has requested an Off-the-Record private conversation. However, you do not have a plugin to support that. See http://otr.cypherpunks.ca/ for more information.";
}
static int
cb_display_otr_message(void *opdata, const char *accountname,
const char *protocol, const char *username, const char *msg)
{
cons_show_error("%s", msg);
return 0;
}
void
otrlib_init_ops(OtrlMessageAppOps *ops)
{
ops->display_otr_message = cb_display_otr_message;
}
ConnContext*
otrlib_context_find(OtrlUserState user_state, const char *const recipient, char *jid)
{
return otrl_context_find(user_state, recipient, jid, "xmpp", 0, NULL, NULL, NULL);
}
void
otrlib_end_session(OtrlUserState user_state, const char *const recipient, char *jid, OtrlMessageAppOps *ops)
{
ConnContext *context = otrl_context_find(user_state, recipient, jid, "xmpp",
0, NULL, NULL, NULL);
if (context) {
otrl_message_disconnect(user_state, ops, NULL, jid, "xmpp", recipient);
}
}
gcry_error_t
otrlib_encrypt_message(OtrlUserState user_state, OtrlMessageAppOps *ops, char *jid, const char *const to,
const char *const message, char **newmessage)
{
gcry_error_t err;
err = otrl_message_sending(
user_state,
ops,
NULL,
jid,
"xmpp",
to,
message,
0,
newmessage,
NULL,
NULL);
return err;
}
int
otrlib_decrypt_message(OtrlUserState user_state, OtrlMessageAppOps *ops, char *jid, const char *const from,
const char *const message, char **decrypted, OtrlTLV **tlvs)
{
return otrl_message_receiving(
user_state,
ops,
NULL,
jid,
"xmpp",
from,
message,
decrypted,
tlvs,
NULL,
NULL);
}
void
otrlib_handle_tlvs(OtrlUserState user_state, OtrlMessageAppOps *ops, ConnContext *context, OtrlTLV *tlvs, GHashTable *smp_initiators)
{
NextExpectedSMP nextMsg = context->smstate->nextExpected;
OtrlTLV *tlv = otrl_tlv_find(tlvs, OTRL_TLV_SMP1);
if (tlv) {
if (nextMsg != OTRL_SMP_EXPECT1) {
otrl_message_abort_smp(user_state, ops, NULL, context);
} else {
ProfChatWin *chatwin = wins_get_chat(context->username);
if (chatwin) {
chatwin_otr_smp_event(chatwin, PROF_OTR_SMP_INIT, NULL);
}
g_hash_table_insert(smp_initiators, strdup(context->username), strdup(context->username));
}
}
tlv = otrl_tlv_find(tlvs, OTRL_TLV_SMP1Q);
if (tlv) {
if (nextMsg != OTRL_SMP_EXPECT1) {
otrl_message_abort_smp(user_state, ops, NULL, context);
} else {
ProfChatWin *chatwin = wins_get_chat(context->username);
if (chatwin) {
char *question = (char *)tlv->data;
char *eoq = memchr(question, '\0', tlv->len);
if (eoq) {
chatwin_otr_smp_event(chatwin, PROF_OTR_SMP_INIT_Q, question);
}
}
}
}
tlv = otrl_tlv_find(tlvs, OTRL_TLV_SMP2);
if (tlv) {
if (nextMsg != OTRL_SMP_EXPECT2) {
otrl_message_abort_smp(user_state, ops, NULL, context);
} else {
context->smstate->nextExpected = OTRL_SMP_EXPECT4;
}
}
tlv = otrl_tlv_find(tlvs, OTRL_TLV_SMP3);
if (tlv) {
if (nextMsg != OTRL_SMP_EXPECT3) {
otrl_message_abort_smp(user_state, ops, NULL, context);
} else {
context->smstate->nextExpected = OTRL_SMP_EXPECT1;
ProfChatWin *chatwin = wins_get_chat(context->username);
if (chatwin) {
if (context->smstate->received_question == 0) {
if (context->active_fingerprint->trust && (context->active_fingerprint->trust[0] != '\0')) {
chatwin_otr_smp_event(chatwin, PROF_OTR_SMP_SUCCESS, NULL);
chatwin_otr_trust(chatwin);
} else {
chatwin_otr_smp_event(chatwin, PROF_OTR_SMP_SENDER_FAIL, NULL);
chatwin_otr_untrust(chatwin);
}
} else {
if (context->smstate->sm_prog_state == OTRL_SMP_PROG_SUCCEEDED) {
chatwin_otr_smp_event(chatwin, PROF_OTR_SMP_SUCCESS_Q, NULL);
} else {
chatwin_otr_smp_event(chatwin, PROF_OTR_SMP_FAIL_Q, NULL);
}
}
}
}
}
tlv = otrl_tlv_find(tlvs, OTRL_TLV_SMP4);
if (tlv) {
if (nextMsg != OTRL_SMP_EXPECT4) {
otrl_message_abort_smp(user_state, ops, NULL, context);
} else {
context->smstate->nextExpected = OTRL_SMP_EXPECT1;
ProfChatWin *chatwin = wins_get_chat(context->username);
if (chatwin) {
if (context->active_fingerprint->trust && (context->active_fingerprint->trust[0] != '\0')) {
chatwin_otr_smp_event(chatwin, PROF_OTR_SMP_SUCCESS, NULL);
chatwin_otr_trust(chatwin);
} else {
chatwin_otr_smp_event(chatwin, PROF_OTR_SMP_RECEIVER_FAIL, NULL);
chatwin_otr_untrust(chatwin);
}
}
}
}
tlv = otrl_tlv_find(tlvs, OTRL_TLV_SMP_ABORT);
if (tlv) {
context->smstate->nextExpected = OTRL_SMP_EXPECT1;
ProfChatWin *chatwin = wins_get_chat(context->username);
if (chatwin) {
chatwin_otr_smp_event(chatwin, PROF_OTR_SMP_ABORT, NULL);
chatwin_otr_untrust(chatwin);
}
otr_untrust(context->username);
}
}
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