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/*
Copyright (C) 2005-2009 Michel de Boer <michel@twinklephone.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, see <https://www.gnu.org/licenses/>.
*/
// Author: Werner Dittmann <Werner.Dittmann@t-online.de>, (C) 2006
// Michel de Boer <michel@twinklephone.com>
#include "twinkle_zrtp_ui.h"
#ifdef HAVE_ZRTP
#include "phone.h"
#include "line.h"
#include "log.h"
#include "util.h"
using namespace std;
using namespace GnuZrtpCodes;
extern t_phone *phone;
// Initialize static data
map<int32, std::string>TwinkleZrtpUI::infoMap;
map<int32, std::string>TwinkleZrtpUI::warningMap;
map<int32, std::string>TwinkleZrtpUI::severeMap;
map<int32, std::string>TwinkleZrtpUI::zrtpMap;
bool TwinkleZrtpUI::mapsDone = false;
std::string TwinkleZrtpUI::unknownCode = "Unknown error code";
TwinkleZrtpUI::TwinkleZrtpUI(t_audio_session* session) :
audioSession(session)
{
if (mapsDone) {
return;
}
// Initialize error mapping
infoMap.insert(pair<int32, std::string>(InfoHelloReceived,
string("Hello received, preparing a Commit")));
infoMap.insert(pair<int32, std::string>(InfoCommitDHGenerated,
string("Commit: Generated a public DH key")));
infoMap.insert(pair<int32, std::string>(InfoRespCommitReceived,
string("Responder: Commit received, preparing DHPart1")));
infoMap.insert(pair<int32, std::string>(InfoDH1DHGenerated,
string("DH1Part: Generated a public DH key")));
infoMap.insert(pair<int32, std::string>(InfoInitDH1Received,
string("Initiator: DHPart1 received, preparing DHPart2")));
infoMap.insert(pair<int32, std::string>(InfoRespDH2Received,
string("Responder: DHPart2 received, preparing Confirm1")));
infoMap.insert(pair<int32, std::string>(InfoInitConf1Received,
string("Initiator: Confirm1 received, preparing Confirm2")));
infoMap.insert(pair<int32, std::string>(InfoRespConf2Received,
string("Responder: Confirm2 received, preparing Conf2Ack")));
infoMap.insert(pair<int32, std::string>(InfoRSMatchFound,
string("At least one retained secrets matches - security OK")));
infoMap.insert(pair<int32, std::string>(InfoSecureStateOn,
string("Entered secure state")));
infoMap.insert(pair<int32, std::string>(InfoSecureStateOff,
string("No more security for this session")));
warningMap.insert(pair<int32, std::string>(WarningDHAESmismatch,
string("Commit contains an AES256 cipher but does not offer a Diffie-Helman 4096")));
warningMap.insert(pair<int32, std::string>(WarningGoClearReceived,
string("Received a GoClear message")));
warningMap.insert(pair<int32, std::string>(WarningDHShort,
string("Hello offers an AES256 cipher but does not offer a Diffie-Helman 4096")));
warningMap.insert(pair<int32, std::string>(WarningNoRSMatch,
string("No retained shared secrets available - must verify SAS")));
warningMap.insert(pair<int32, std::string>(WarningCRCmismatch,
string("Internal ZRTP packet checksum mismatch - packet dropped")));
warningMap.insert(pair<int32, std::string>(WarningSRTPauthError,
string("Dropping packet because SRTP authentication failed!")));
warningMap.insert(pair<int32, std::string>(WarningSRTPreplayError,
string("Dropping packet because SRTP replay check failed!")));
warningMap.insert(pair<int32, std::string>(WarningNoExpectedRSMatch,
string("Valid retained shared secrets availabe but no matches found - must verify SAS")));
severeMap.insert(pair<int32, std::string>(SevereHelloHMACFailed,
string("Hash HMAC check of Hello failed!")));
severeMap.insert(pair<int32, std::string>(SevereCommitHMACFailed,
string("Hash HMAC check of Commit failed!")));
severeMap.insert(pair<int32, std::string>(SevereDH1HMACFailed,
string("Hash HMAC check of DHPart1 failed!")));
severeMap.insert(pair<int32, std::string>(SevereDH2HMACFailed,
string("Hash HMAC check of DHPart2 failed!")));
severeMap.insert(pair<int32, std::string>(SevereCannotSend,
string("Cannot send data - connection or peer down?")));
severeMap.insert(pair<int32, std::string>(SevereProtocolError,
string("Internal protocol error occured!")));
severeMap.insert(pair<int32, std::string>(SevereNoTimer,
string("Cannot start a timer - internal resources exhausted?")));
severeMap.insert(pair<int32, std::string>(SevereTooMuchRetries,
string("Too much retries during ZRTP negotiation - connection or peer down?")));
zrtpMap.insert(pair<int32, std::string>(MalformedPacket,
string("Malformed packet (CRC OK, but wrong structure)")));
zrtpMap.insert(pair<int32, std::string>(CriticalSWError,
string("Critical software error")));
zrtpMap.insert(pair<int32, std::string>(UnsuppZRTPVersion,
string("Unsupported ZRTP version")));
zrtpMap.insert(pair<int32, std::string>(HelloCompMismatch,
string("Hello components mismatch")));
zrtpMap.insert(pair<int32, std::string>(UnsuppHashType,
string("Hash type not supported")));
zrtpMap.insert(pair<int32, std::string>(UnsuppCiphertype,
string("Cipher type not supported")));
zrtpMap.insert(pair<int32, std::string>(UnsuppPKExchange,
string("Public key exchange not supported")));
zrtpMap.insert(pair<int32, std::string>(UnsuppSRTPAuthTag,
string("SRTP auth. tag not supported")));
zrtpMap.insert(pair<int32, std::string>(UnsuppSASScheme,
string("SAS scheme not supported")));
zrtpMap.insert(pair<int32, std::string>(NoSharedSecret,
string("No shared secret available, DH mode required")));
zrtpMap.insert(pair<int32, std::string>(DHErrorWrongPV,
string("DH Error: bad pvi or pvr ( == 1, 0, or p-1)")));
zrtpMap.insert(pair<int32, std::string>(DHErrorWrongHVI,
string("DH Error: hvi != hashed data")));
zrtpMap.insert(pair<int32, std::string>(SASuntrustedMiTM,
string("Received relayed SAS from untrusted MiTM")));
zrtpMap.insert(pair<int32, std::string>(ConfirmHMACWrong,
string("Auth. Error: Bad Confirm pkt HMAC")));
zrtpMap.insert(pair<int32, std::string>(NonceReused,
string("Nonce reuse")));
zrtpMap.insert(pair<int32, std::string>(EqualZIDHello,
string("Equal ZIDs in Hello")));
zrtpMap.insert(pair<int32, std::string>(GoCleatNotAllowed,
string("GoClear packet received, but not allowed")));
mapsDone = true;
}
void TwinkleZrtpUI::secureOn(std::string cipher) {
audioSession->set_is_encrypted(true);
audioSession->set_srtp_cipher_mode(cipher);
t_line *line = audioSession->get_line();
int lineno = line->get_line_number();
log_file->write_header("TwinkleZrtpUI::secureOn");
log_file->write_raw("Line ");
log_file->write_raw(lineno + 1);
log_file->write_raw(": audio encryption enabled: ");
log_file->write_raw(cipher);
log_file->write_endl();
log_file->write_footer();
ui->cb_async_line_encrypted(lineno, true);
ui->cb_async_line_state_changed();
}
void TwinkleZrtpUI::secureOff() {
audioSession->set_is_encrypted(false);
t_line *line = audioSession->get_line();
int lineno = line->get_line_number();
log_file->write_header("TwinkleZrtpUI::secureOff");
log_file->write_raw("Line ");
log_file->write_raw(lineno + 1);
log_file->write_raw(": audio encryption disabled.\n");
log_file->write_footer();
ui->cb_async_line_encrypted(lineno, false);
ui->cb_async_line_state_changed();
}
void TwinkleZrtpUI::showSAS(std::string sas, bool verified) {
audioSession->set_zrtp_sas(sas);
audioSession->set_zrtp_sas_confirmed(verified);
t_line *line = audioSession->get_line();
int lineno = line->get_line_number();
log_file->write_header("TwinkleZrtpUI::showSAS");
log_file->write_raw("Line ");
log_file->write_raw(lineno + 1);
log_file->write_raw(": SAS =");
log_file->write_raw(sas);
log_file->write_endl();
log_file->write_footer();
if (!verified) {
ui->cb_async_show_zrtp_sas(lineno, sas);
}
ui->cb_async_line_state_changed();
}
void TwinkleZrtpUI::confirmGoClear() {
t_line *line = audioSession->get_line();
int lineno = line->get_line_number();
ui->cb_async_zrtp_confirm_go_clear(lineno);
}
void TwinkleZrtpUI::showMessage(MessageSeverity sev, int subCode) {
t_line *line = audioSession->get_line();
int lineno = line->get_line_number();
string msg = "Line ";
msg += int2str(lineno + 1);
msg += ": ";
msg += *mapCodesToString(sev, subCode);
switch (sev) {
case Info:
log_file->write_report(msg, "TwinkleZrtpUI::showMessage", LOG_NORMAL,
LOG_INFO);
break;
case Warning:
log_file->write_report(msg, "TwinkleZrtpUI::showMessage", LOG_NORMAL,
LOG_WARNING);
break;
default:
log_file->write_report(msg, "TwinkleZrtpUI::showMessage", LOG_NORMAL,
LOG_CRITICAL);
}
}
void TwinkleZrtpUI::zrtpNegotiationFailed(MessageSeverity severity, int subCode) {
t_line *line = audioSession->get_line();
int lineno = line->get_line_number();
string m = "Line ";
m += int2str(lineno + 1);
m += ": ZRTP negotiation failed.\n";
m += *mapCodesToString(severity, subCode);
switch (severity) {
case Info:
log_file->write_report(m, "TwinkleZrtpUI::zrtpNegotiationFailed", LOG_NORMAL,
LOG_INFO);
break;
case Warning:
log_file->write_report(m, "TwinkleZrtpUI::zrtpNegotiationFailed", LOG_NORMAL,
LOG_WARNING);
break;
default:
log_file->write_report(m, "TwinkleZrtpUI::zrtpNegotiationFailed", LOG_NORMAL,
LOG_CRITICAL);
}
}
void TwinkleZrtpUI::zrtpNotSuppOther() {
t_line *line = audioSession->get_line();
int lineno = line->get_line_number();
string msg = "Line ";
msg += int2str(lineno + 1);
msg += ": remote party does not support ZRTP.";
log_file->write_report(msg, "TwinkleZrtpUI::zrtpNotSuppOther");
}
const string *const TwinkleZrtpUI::mapCodesToString(MessageSeverity severity, int subCode) {
string *m = &unknownCode;
switch (severity) {
case Info:
m = &infoMap[subCode];
break;
case Warning:
m = &warningMap[subCode];
break;
case Severe:
m = &severeMap[subCode];
break;
case ZrtpError:
if (subCode < 0) {
subCode *= -1;
}
m = &zrtpMap[subCode];
break;
default:
break;
}
return m;
}
#endif
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