static void
_otr_tlv_free(OtrlTLV *tlvs)
{
if (tlvs) {
otrl_tlv_free(tlvs);
}
}
static void sending(const char *from, const char *to, const char *msg)
{
gcry_error_t err;
OtrlTLV *tlvs = NULL;
char *newmsg;
err = otrl_message_sending(us, &ops, NULL, from, PROTO, to, msg,
tlvs, &newmsg, NULL, NULL, NULL);
if (!err) {
inject(from, to, newmsg ? newmsg : msg);
}
otrl_message_free(newmsg);
otrl_tlv_free(tlvs);
}
void receiving(const char *from, const char *to, const char *msg)
{
int ignore;
char *newmsg;
OtrlTLV *tlvs;
ignore = otrl_message_receiving(us, &ops, NULL, to, PROTO, from, msg,
&newmsg, &tlvs, NULL, NULL);
if (!ignore) {
printf("%s> %s\n\n", from, newmsg ? newmsg : msg);
}
otrl_message_free(newmsg);
otrl_tlv_free(tlvs);
}
psiotr::OtrMessageType OtrInternal::decryptMessage(const QString& account,
const QString& contact,
const QString& cryptedMessage,
QString& decrypted)
{
QByteArray accArray = account.toUtf8();
QByteArray userArray = contact.toUtf8();
const char* accountName = accArray.constData();
const char* userName = userArray.constData();
int ignoreMessage = 0;
char* newMessage = NULL;
OtrlTLV* tlvs = NULL;
OtrlTLV* tlv = NULL;
ignoreMessage = otrl_message_receiving(m_userstate, &m_uiOps, this,
accountName,
OTR_PROTOCOL_STRING,
userName,
cryptedMessage.toUtf8().constData(),
&newMessage,
&tlvs, NULL,
#if (OTRL_VERSION_MAJOR >= 4)
NULL,
#endif
NULL);
tlv = otrl_tlv_find(tlvs, OTRL_TLV_DISCONNECTED);
if (tlv) {
m_callback->stateChange(accountName, userName,
psiotr::OTR_STATECHANGE_REMOTECLOSE);
}
#if (OTRL_VERSION_MAJOR >= 4)
// Magic hack to force it work similar to libotr < 4.0.0.
// If user received unencrypted message he (she) should be notified.
// See OTRL_MSGEVENT_RCVDMSG_UNENCRYPTED as well.
if (ignoreMessage && !newMessage && !cryptedMessage.startsWith("?OTR")) {
ignoreMessage = 0;
}
#else
// Check for SMP data (required only with libotr < 4.0.0)
ConnContext* context = otrl_context_find(m_userstate, userName, accountName,
OTR_PROTOCOL_STRING,
false, NULL, NULL, NULL);
if (context) {
NextExpectedSMP nextMsg = context->smstate->nextExpected;
if (context->smstate->sm_prog_state == OTRL_SMP_PROG_CHEATED) {
abortSMP(context);
// Reset state
context->smstate->nextExpected = OTRL_SMP_EXPECT1;
context->smstate->sm_prog_state = OTRL_SMP_PROG_OK;
// Report result to user
m_callback->updateSMP(accountName, userName, -2);
}
else
{
tlv = otrl_tlv_find(tlvs, OTRL_TLV_SMP1Q);
if (tlv) {
if (nextMsg != OTRL_SMP_EXPECT1)
{
abortSMP(context);
}
else
{
char* question = (char *)tlv->data;
char* eoq = static_cast<char*>(memchr(question, '\0', tlv->len));
if (eoq) {
m_callback->receivedSMP(accountName, userName,
QString::fromUtf8(question));
}
}
}
tlv = otrl_tlv_find(tlvs, OTRL_TLV_SMP1);
if (tlv) {
if (nextMsg != OTRL_SMP_EXPECT1)
{
abortSMP(context);
}
else
{
m_callback->receivedSMP(accountName, userName, QString());
}
}
tlv = otrl_tlv_find(tlvs, OTRL_TLV_SMP2);
if (tlv) {
if (nextMsg != OTRL_SMP_EXPECT2)
{
abortSMP(context);
}
else
{
// If we received TLV2, we will send TLV3 and expect TLV4
context->smstate->nextExpected = OTRL_SMP_EXPECT4;
// Report result to user
m_callback->updateSMP(accountName, userName, 66);
}
}
tlv = otrl_tlv_find(tlvs, OTRL_TLV_SMP3);
if (tlv) {
if (nextMsg != OTRL_SMP_EXPECT3)
{
abortSMP(context);
}
else
{
// SMP finished, reset
context->smstate->nextExpected = OTRL_SMP_EXPECT1;
// Report result to user
m_callback->updateSMP(accountName, userName, 100);
}
}
tlv = otrl_tlv_find(tlvs, OTRL_TLV_SMP4);
if (tlv) {
if (nextMsg != OTRL_SMP_EXPECT4)
{
abortSMP(context);
}
else
{
// SMP finished, reset
context->smstate->nextExpected = OTRL_SMP_EXPECT1;
// Report result to user
m_callback->updateSMP(accountName, userName, 100);
}
}
tlv = otrl_tlv_find(tlvs, OTRL_TLV_SMP_ABORT);
if (tlv) {
// SMP aborted, reset
context->smstate->nextExpected = OTRL_SMP_EXPECT1;
// Report result to user
m_callback->updateSMP(accountName, userName, -1);
}
}
}
#endif
otrl_tlv_free(tlvs);
if (ignoreMessage == 1)
{
// Internal protocol message
return psiotr::OTR_MESSAGETYPE_IGNORE;
}
else if ((ignoreMessage == 0) && newMessage)
{
// Message has been decrypted, replace it
decrypted = QString::fromUtf8(newMessage);
otrl_message_free(newMessage);
return psiotr::OTR_MESSAGETYPE_OTR;
}
return psiotr::OTR_MESSAGETYPE_NONE;
}
/*
* Hand the given message to OTR.
*
* Returns 0 if its an OTR protocol message or else negative value.
*/
int otr_receive(SERVER_REC *irssi, const char *msg, const char *from,
char **new_msg)
{
int ret = -1;
char *accname = NULL, *full_msg = NULL;
const char *recv_msg = NULL;
OtrlTLV *tlvs;
ConnContext *ctx;
struct otr_peer_context *opc;
assert(irssi);
accname = create_account_name(irssi);
if (!accname) {
goto error;
}
IRSSI_DEBUG("Receiving message...");
ctx = otr_find_context(irssi, from, 1);
if (!ctx) {
goto error;
}
/* Add peer context to OTR context if none exists */
if (!ctx->app_data) {
add_peer_context_cb(irssi, ctx);
}
opc = ctx->app_data;
assert(opc);
ret = enqueue_otr_fragment(msg, opc, &full_msg);
switch (ret) {
case OTR_MSG_ORIGINAL:
recv_msg = msg;
break;
case OTR_MSG_WAIT_MORE:
ret = 1;
goto error;
case OTR_MSG_USE_QUEUE:
recv_msg = full_msg;
break;
case OTR_MSG_ERROR:
ret = -1;
goto error;
}
ret = otrl_message_receiving(user_state_global->otr_state,
&otr_ops, irssi, accname, OTR_PROTOCOL_ID, from, recv_msg, new_msg,
&tlvs, &ctx, add_peer_context_cb, irssi);
if (ret) {
IRSSI_DEBUG("Ignoring message of length %d from %s to %s.\n"
"%s", strlen(msg), from, accname, msg);
} else {
if (*new_msg) {
IRSSI_DEBUG("Converted received message.");
}
}
/* Check for disconnected message */
OtrlTLV *tlv = otrl_tlv_find(tlvs, OTRL_TLV_DISCONNECTED);
if (tlv) {
otr_status_change(irssi, from, OTR_STATUS_PEER_FINISHED);
IRSSI_NOTICE(irssi, from, "%9%s%9 has finished the OTR "
"conversation. If you want to continue talking enter "
"%9/otr finish%9 for plaintext or %9/otr init%9 to restart.",
from);
}
otrl_tlv_free(tlvs);
IRSSI_DEBUG("Message received.");
error:
if (full_msg) {
free(full_msg);
}
free(accname);
return ret;
}
QString OtrInternal::decryptMessage(const QString& from, const QString& to,
const QString& cryptedMessage, TreeModelItem &item)
{
QString protocol = item.m_protocol_name;
int ignoreMessage = 0;
char *newMessage = NULL;
OtrlTLV *tlvs = NULL;
OtrlTLV *tlv = NULL;
ConnContext *context = 0;
NextExpectedSMP nextMsg;
ignoreMessage = otrl_message_receiving(m_userstate, &m_uiOps, this,
to.toStdString().c_str(),
protocol.toStdString().c_str(),
from.toStdString().c_str(),
cryptedMessage.toUtf8().data(),
&newMessage,
&tlvs, NULL, NULL);
context = otrl_context_find( m_userstate, from.toStdString().c_str(), to.toStdString().c_str(), protocol.toStdString().c_str(), 0, NULL, NULL, NULL);
// qDebug() << "[OTR] context fragment: " << QString(context->lastmessage);
tlv = otrl_tlv_find(tlvs, OTRL_TLV_DISCONNECTED);
if( tlv ){
sendCustomNessage(item,tr("%1 has ended the OTR session. You should do the same.").arg(item.m_item_name));
gone_insecure(context);
}
while (context) {
OtrlSMState *state = context->smstate;
if(!state)
break;
nextMsg = state->nextExpected;
tlv = otrl_tlv_find(tlvs, OTRL_TLV_SMP1Q);
if (tlv) {
// qDebug() << "[OTR] SMP detected. Found SMP1Q";
//a-la pidgin
if (nextMsg != OTRL_SMP_EXPECT1)
abortSMP(context,item);
else {
char *question = (char *)tlv->data;
char *eoq = (char*)memchr(question, '\0', tlv->len);
if (eoq)
{
QString ans = QInputDialog::getText(NULL,tr("Auth"),tr("Please, answer the question to be authorised by %1.<br>Question: <b>%2</b>").arg(from).arg(QString(question)));
if(!ans.isEmpty())
respondSMP(context,item,ans,false);
else
abortSMP(context,item);
}
}
}
tlv = otrl_tlv_find(tlvs, OTRL_TLV_SMP1);
if (tlv) {
// qDebug() << "[OTR] SMP detected. Found SMP1";
if (nextMsg != OTRL_SMP_EXPECT1 ){
abortSMP( context, item );
} else {
QString s = QInputDialog::getText ( NULL, tr("Authorysing"), tr("Please, enter passphrase to authorise %1").arg(context->username), QLineEdit::Normal);
if(!s.isEmpty())
respondSMP(context,item,s,false);
else
abortSMP(context,item);
}
}
tlv = otrl_tlv_find(tlvs, OTRL_TLV_SMP2);
if (tlv) {
// qDebug() << "[OTR] SMP detected. Found SMP2";
if (nextMsg != OTRL_SMP_EXPECT2){
abortSMP( context, item );
} else {
context->smstate->nextExpected = OTRL_SMP_EXPECT4;
}
}
tlv = otrl_tlv_find(tlvs, OTRL_TLV_SMP3);
if (tlv) {
// qDebug() << "[OTR] SMP detected. Found SMP3";
if (nextMsg != OTRL_SMP_EXPECT3){
abortSMP( context, item );
} else {
if (context->active_fingerprint->trust && context->active_fingerprint->trust[0]) {
sendCustomNessage(item, tr("Your buddy has successfully authenticated you. The conversation is now secure!"));
gone_secure(context);
} else {
// sendCustomNessage(item, tr("Authentication failed. The conversation is now insecure!"));
sendCustomNessage(item,tr("Your buddy has successfully authenticated you. You may want to authenticate your buddy as well by asking your own question."));
gone_secure(context);
}
context->smstate->nextExpected = OTRL_SMP_EXPECT1;
}
}
tlv = otrl_tlv_find(tlvs, OTRL_TLV_SMP4);
if (tlv) {
// qDebug() << "[OTR] SMP detected. Found SMP4";
if (nextMsg != OTRL_SMP_EXPECT4) {
abortSMP( context, item );
} else {
if (context->active_fingerprint->trust && context->active_fingerprint->trust[0]) {
sendCustomNessage(item, tr("Authentication successful. The conversation is now secure!"));
gone_secure(context);
} else {
sendCustomNessage(item, tr("Authentication failed. The conversation is now insecure!"));
gone_secure(context);
}
context->smstate->nextExpected = OTRL_SMP_EXPECT1;
}
}
tlv = otrl_tlv_find(tlvs, OTRL_TLV_SMP_ABORT);
if (tlv) {
// qDebug() << "[OTR] SMP detected. Found SMP_ABORT";
sendCustomNessage(item,tr("Authentication error!").toLocal8Bit() );
context->smstate->nextExpected = OTRL_SMP_EXPECT1;
}
otrl_tlv_free(tlvs);
break;
}
if (ignoreMessage == 1) // internal protocol message
{
OtrlMessageType type = otrl_proto_message_type(
cryptedMessage.toStdString().c_str());
QString retMessage("<Internal OTR message>\n"+tr("received %1 \nOTR state now is [%2]").arg(otrlMessageTypeToString(type)).arg(getMessageStateString(to, from, item))) ;
if (getMessageState(to, from, item) == qutimotr::OTR_MESSAGESTATE_ENCRYPTED)
{
retMessage.append(tr("\nsessionId: ") + getSessionId(to, from, item));
}
// TODO: если бы эти сообщения можна было заблокировать...
// но recivelevel1/2 не дает такой возможности... почему то
// хотя в вики написано обратное
// sendCustomNessage(item,retMessage);
return retMessage;
}
else if (ignoreMessage == 0)
{
if (newMessage != NULL) // message has been decrypted. replace it
{
QString retMessage = QString::fromUtf8(newMessage);
otrl_message_free(newMessage);
return retMessage;
}
else // received message was not an otr message
{
return cryptedMessage;
}
}
assert(false);
return QString();
}
