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profanity/src/otr/otrlibv4.c

321 lines
10 KiB
C

/*
* otrlibv4.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 "config.h"
#include <libotr/proto.h>
#include <libotr/privkey.h>
#include <libotr/message.h>
#include "log.h"
#include "otr/otr.h"
#include "otr/otrlib.h"
#include "ui/ui.h"
#include "ui/window_list.h"
static GTimer* timer;
static unsigned int current_interval;
OtrlPolicy
otrlib_policy(void)
{
return OTRL_POLICY_ALLOW_V1 | OTRL_POLICY_ALLOW_V2;
}
void
otrlib_init_timer(void)
{
OtrlUserState user_state = otr_userstate();
timer = g_timer_new();
current_interval = otrl_message_poll_get_default_interval(user_state);
}
void
otrlib_poll(void)
{
gdouble elapsed = g_timer_elapsed(timer, NULL);
if (current_interval != 0 && elapsed > current_interval) {
OtrlUserState user_state = otr_userstate();
OtrlMessageAppOps* ops = otr_messageops();
otrl_message_poll(user_state, ops, NULL);
g_timer_start(timer);
}
}
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 const char*
cb_otr_error_message(void* opdata, ConnContext* context, OtrlErrorCode err_code)
{
switch (err_code) {
case OTRL_ERRCODE_ENCRYPTION_ERROR:
return strdup("OTR Error: occurred while encrypting a message");
case OTRL_ERRCODE_MSG_NOT_IN_PRIVATE:
return strdup("OTR Error: Sent encrypted message to somebody who is not in a mutual OTR session");
case OTRL_ERRCODE_MSG_UNREADABLE:
return strdup("OTR Error: sent an unreadable encrypted message");
case OTRL_ERRCODE_MSG_MALFORMED:
return strdup("OTR Error: message sent is malformed");
default:
return strdup("OTR Error: unknown");
}
}
static void
cb_otr_error_message_free(void* opdata, const char* err_msg)
{
free((char*)err_msg);
}
static void
cb_timer_control(void* opdata, unsigned int interval)
{
current_interval = interval;
}
static void
cb_handle_msg_event(void* opdata, OtrlMessageEvent msg_event,
ConnContext* context, const char* message,
gcry_error_t err)
{
GString* err_msg;
switch (msg_event) {
case OTRL_MSGEVENT_ENCRYPTION_REQUIRED:
ui_handle_otr_error(context->username, "OTR: Policy requires encryption, but attempting to send an unencrypted message.");
break;
case OTRL_MSGEVENT_ENCRYPTION_ERROR:
ui_handle_otr_error(context->username, "OTR: Error occurred while encrypting a message, message not sent.");
break;
case OTRL_MSGEVENT_CONNECTION_ENDED:
ui_handle_otr_error(context->username, "OTR: Message not sent because contact has ended the private conversation.");
break;
case OTRL_MSGEVENT_SETUP_ERROR:
ui_handle_otr_error(context->username, "OTR: A private conversation could not be set up.");
break;
case OTRL_MSGEVENT_MSG_REFLECTED:
ui_handle_otr_error(context->username, "OTR: Received our own OTR message.");
break;
case OTRL_MSGEVENT_MSG_RESENT:
ui_handle_otr_error(context->username, "OTR: The previous message was resent.");
break;
case OTRL_MSGEVENT_RCVDMSG_NOT_IN_PRIVATE:
ui_handle_otr_error(context->username, "OTR: Received an encrypted message but no private connection established.");
break;
case OTRL_MSGEVENT_RCVDMSG_UNREADABLE:
ui_handle_otr_error(context->username, "OTR: Cannot read the received message.");
break;
case OTRL_MSGEVENT_RCVDMSG_MALFORMED:
ui_handle_otr_error(context->username, "OTR: The message received contains malformed data.");
break;
case OTRL_MSGEVENT_RCVDMSG_GENERAL_ERR:
err_msg = g_string_new("OTR: Received error: ");
g_string_append(err_msg, message);
g_string_append(err_msg, ".");
ui_handle_otr_error(context->username, err_msg->str);
g_string_free(err_msg, TRUE);
break;
case OTRL_MSGEVENT_RCVDMSG_UNENCRYPTED:
err_msg = g_string_new("OTR: Received an unencrypted message: ");
g_string_append(err_msg, message);
ui_handle_otr_error(context->username, err_msg->str);
g_string_free(err_msg, TRUE);
break;
case OTRL_MSGEVENT_RCVDMSG_UNRECOGNIZED:
ui_handle_otr_error(context->username, "OTR: Cannot recognize the type of message received.");
break;
case OTRL_MSGEVENT_RCVDMSG_FOR_OTHER_INSTANCE:
ui_handle_otr_error(context->username, "OTR: Received and discarded a message intended for another instance.");
break;
default:
break;
}
}
static void
cb_handle_smp_event(void* opdata, OtrlSMPEvent smp_event,
ConnContext* context, unsigned short progress_percent,
char* question)
{
NextExpectedSMP nextMsg = context->smstate->nextExpected;
OtrlUserState user_state = otr_userstate();
OtrlMessageAppOps* ops = otr_messageops();
GHashTable* smp_initiators = otr_smpinitators();
ProfChatWin* chatwin = wins_get_chat(context->username);
switch (smp_event) {
case OTRL_SMPEVENT_ASK_FOR_SECRET:
if (chatwin) {
chatwin_otr_smp_event(chatwin, PROF_OTR_SMP_INIT, NULL);
}
g_hash_table_insert(smp_initiators, strdup(context->username), strdup(context->username));
break;
case OTRL_SMPEVENT_ASK_FOR_ANSWER:
if (chatwin) {
chatwin_otr_smp_event(chatwin, PROF_OTR_SMP_INIT_Q, question);
}
break;
case OTRL_SMPEVENT_SUCCESS:
if (chatwin) {
if (context->smstate->received_question == 0) {
chatwin_otr_smp_event(chatwin, PROF_OTR_SMP_SUCCESS, NULL);
chatwin_otr_trust(chatwin);
} else {
chatwin_otr_smp_event(chatwin, PROF_OTR_SMP_SUCCESS_Q, NULL);
}
}
break;
case OTRL_SMPEVENT_FAILURE:
if (chatwin) {
if (context->smstate->received_question == 0) {
if (nextMsg == OTRL_SMP_EXPECT3) {
chatwin_otr_smp_event(chatwin, PROF_OTR_SMP_SENDER_FAIL, NULL);
} else if (nextMsg == OTRL_SMP_EXPECT4) {
chatwin_otr_smp_event(chatwin, PROF_OTR_SMP_RECEIVER_FAIL, NULL);
}
chatwin_otr_untrust(chatwin);
} else {
chatwin_otr_smp_event(chatwin, PROF_OTR_SMP_FAIL_Q, NULL);
}
}
break;
case OTRL_SMPEVENT_ERROR:
otrl_message_abort_smp(user_state, ops, NULL, context);
break;
case OTRL_SMPEVENT_CHEATED:
otrl_message_abort_smp(user_state, ops, NULL, context);
break;
case OTRL_SMPEVENT_ABORT:
if (chatwin) {
chatwin_otr_smp_event(chatwin, PROF_OTR_SMP_ABORT, NULL);
chatwin_otr_untrust(chatwin);
}
break;
case OTRL_SMPEVENT_IN_PROGRESS:
break;
default:
break;
}
}
void
otrlib_init_ops(OtrlMessageAppOps* ops)
{
ops->otr_error_message = cb_otr_error_message;
ops->otr_error_message_free = cb_otr_error_message_free;
ops->handle_msg_event = cb_handle_msg_event;
ops->handle_smp_event = cb_handle_smp_event;
ops->timer_control = cb_timer_control;
}
ConnContext*
otrlib_context_find(OtrlUserState user_state, const char* const recipient, char* jid)
{
return otrl_context_find(user_state, recipient, jid, "xmpp", OTRL_INSTAG_MASTER, 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",
OTRL_INSTAG_MASTER, 0, NULL, NULL, NULL);
if (context) {
otrl_message_disconnect(user_state, ops, NULL, jid, "xmpp", recipient, 0);
}
}
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,
OTRL_INSTAG_MASTER,
message,
0,
newmessage,
OTRL_FRAGMENT_SEND_SKIP,
NULL,
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,
NULL);
}
void
otrlib_handle_tlvs(OtrlUserState user_state, OtrlMessageAppOps* ops, ConnContext* context, OtrlTLV* tlvs, GHashTable* smp_initiators)
{
}