//
// Sign a CAlert and serialize it
//
bool SignAndSave(CAlert &alert)
{
// Sign
if(!alert.Sign())
{
printf("SignAndSave() : could not sign alert:\n%s", alert.ToString().c_str());
return false;
}
std::string strFilePath = "src/test/data/alertTests.raw";
// open output file and associate it with CAutoFile
FILE *file = fopen(strFilePath.c_str(), "ab+");
CAutoFile fileout(file, SER_DISK, CLIENT_VERSION);
if (fileout.IsNull())
return error("%s: Failed to open file %s", __func__, strFilePath);
try {
fileout << alert;
}
catch (std::exception &e) {
return error("%s: Serialize or I/O error - %s", __func__, e.what());
}
fileout.fclose();
return true;
}
void SignAndSave(CAlert alert, const std::string filename) {
//serialze alert message
CDataStream sMsg(SER_NETWORK, PROTOCOL_VERSION);
sMsg << (CUnsignedAlert)alert;
alert.vchMsg.reserve(sMsg.size());
for(size_t i=0; i<sMsg.size(); i++) {
alert.vchMsg.push_back(sMsg[i]);
}
//a dummy secret key with the public key
//0469204F0E1800E16C1F85176BDC27A245F09987DB71A1EF5C4BD48A42F9AFD1D74F21469488DB552B594AC29CE667AD60DAAD0FFBCE03FB0C2AC49FFB07B36DC5
//set to match the mainnet vAlertPubKey from chainparams.cpp
const std::vector<unsigned char> secretKey = ParseHex("1A4976EE6174D80B8B3FF5E9B9C6E638CABFA9A5975557FEA967BC089A5584EE");
CKey secret;
secret.Set(secretKey.begin(), secretKey.end(), false);
assert(secret.IsValid());
//sign alert
secret.Sign(alert.GetHash(), alert.vchSig);
assert(alert.CheckSignature());
//serialize alert
CDataStream ss(SER_DISK, CLIENT_VERSION);
ss << alert;
//write alert
std::ofstream fs;
fs.open(filename.c_str(), std::ios::out | std::ios::app | std::ios::binary);
fs.write((char*)&ss[0], ss.size());
fs.close();
}
// ppcoin: send alert.
// There is a known deadlock situation with ThreadMessageHandler
// ThreadMessageHandler: holds cs_vSend and acquiring cs_main in SendMessages()
// ThreadRPCServer: holds cs_main and acquiring cs_vSend in alert.RelayTo()/PushMessage()/BeginMessage()
UniValue sendalert(const UniValue& params, bool fHelp)
{
if (fHelp || params.size() < 6)
throw runtime_error(
"sendalert <message> <privatekey> <minver> <maxver> <priority> <id> [cancelupto]\n"
"\n"
"<message> ----> is the alert text message\n"
"<privatekey> -> is hex string of alert master private key\n"
"<minver> -----> is the minimum applicable internal client version\n"
"<maxver> -----> is the maximum applicable internal client version\n"
"<priority> ---> is integer priority number\n"
"<id> ---------> is the alert id\n"
"[cancelupto] -> cancels all alert id's up to this number\n"
"\n"
"Returns true or false\n");
CAlert alert;
CKey key;
alert.strStatusBar = params[0].get_str();
alert.nMinVer = params[2].get_int();
alert.nMaxVer = params[3].get_int();
alert.nPriority = params[4].get_int();
alert.nID = params[5].get_int();
if (params.size() > 6)
alert.nCancel = params[6].get_int();
alert.nVersion = PROTOCOL_VERSION;
alert.nRelayUntil = GetAdjustedTime() + 365*24*60*60;
alert.nExpiration = GetAdjustedTime() + 365*24*60*60;
CDataStream sMsg(SER_NETWORK, PROTOCOL_VERSION);
sMsg << (CUnsignedAlert)alert;
alert.vchMsg = vector<unsigned char>(sMsg.begin(), sMsg.end());
vector<unsigned char> vchPrivKey = ParseHex(params[1].get_str());
key.SetPrivKey(CPrivKey(vchPrivKey.begin(), vchPrivKey.end())); // if key is not correct openssl may crash
if (!key.Sign(Hash(alert.vchMsg.begin(), alert.vchMsg.end()), alert.vchSig))
throw runtime_error(
"Unable to sign alert, check private key?\n");
if(!alert.ProcessAlert())
throw runtime_error(
"Failed to process alert.\n");
// Relay alert
{
LOCK(cs_vNodes);
for (auto const& pnode : vNodes)
alert.RelayTo(pnode);
}
UniValue result(UniValue::VOBJ);
result.pushKV("strStatusBar", alert.strStatusBar);
result.pushKV("nVersion", alert.nVersion);
result.pushKV("nMinVer", alert.nMinVer);
result.pushKV("nMaxVer", alert.nMaxVer);
result.pushKV("nPriority", alert.nPriority);
result.pushKV("nID", alert.nID);
if (alert.nCancel > 0)
result.pushKV("nCancel", alert.nCancel);
return result;
}
void ClientModel::updateAlert(const QString& hash, int status)
{
// Show error message notification for new alert
if (status == CT_NEW) {
uint256 hash_256;
hash_256.SetHex(hash.toStdString());
CAlert alert = CAlert::getAlertByHash(hash_256);
if (!alert.IsNull()) {
emit message(tr("Network Alert"), QString::fromStdString(alert.strStatusBar), CClientUIInterface::ICON_ERROR);
}
}
emit alertsChanged(getStatusBarWarnings());
}
bool CAlert::Cancels(const CAlert& alert) const
{
if (!alert.IsInEffect())
return false; // this was a no-op before 31403
return (alert.setCancel.count(alert.nID) == 0);
}
void ClientModel::updateAlert(const QString &hash, int status)
{
// Show error message notification for new alert
if(status == CT_NEW)
{
uint256 hash_256;
hash_256.SetHex(hash.toStdString());
CAlert alert = CAlert::getAlertByHash(hash_256);
if(!alert.IsNull())
{
emit error(tr("Network Alert"), QString::fromStdString(alert.strStatusBar), false);
}
}
// Emit a numBlocksChanged when the status message changes,
// so that the view recomputes and updates the status bar.
emit numBlocksChanged(getNumBlocks(), getNumBlocksOfPeers());
}
void ThreadSendAlert(CConnman& connman)
{
if (!mapArgs.count("-sendalert") && !mapArgs.count("-printalert"))
return;
// Wait one minute so we get well connected. If we only need to print
// but not to broadcast - do this right away.
if (mapArgs.count("-sendalert"))
MilliSleep(60*1000);
//
// Alerts are relayed around the network until nRelayUntil, flood
// filling to every node.
// After the relay time is past, new nodes are told about alerts
// when they connect to peers, until either nExpiration or
// the alert is cancelled by a newer alert.
// Nodes never save alerts to disk, they are in-memory-only.
//
CAlert alert;
alert.nRelayUntil = GetAdjustedTime() + 15 * 60;
alert.nExpiration = GetAdjustedTime() + 30 * 60 * 60;
alert.nID = 1; // keep track of alert IDs somewhere
alert.nCancel = 0; // cancels previous messages up to this ID number
// These versions are protocol versions
alert.nMinVer = 70000;
alert.nMaxVer = 70103;
//
// 1000 for Misc warnings like out of disk space and clock is wrong
// 2000 for longer invalid proof-of-work chain
// Higher numbers mean higher priority
alert.nPriority = 5000;
alert.strComment = "";
alert.strStatusBar = "URGENT: Upgrade required: see https://www.terracoin.io";
// Set specific client version/versions here. If setSubVer is empty, no filtering on subver is done:
// alert.setSubVer.insert(std::string("/Terracoin Core:0.12.0.58/"));
// Sign
if(!alert.Sign())
{
LogPrintf("ThreadSendAlert() : could not sign alert\n");
return;
}
// Test
CDataStream sBuffer(SER_NETWORK, CLIENT_VERSION);
sBuffer << alert;
CAlert alert2;
sBuffer >> alert2;
if (!alert2.CheckSignature(Params().AlertKey()))
{
printf("ThreadSendAlert() : CheckSignature failed\n");
return;
}
assert(alert2.vchMsg == alert.vchMsg);
assert(alert2.vchSig == alert.vchSig);
alert.SetNull();
printf("\nThreadSendAlert:\n");
printf("hash=%s\n", alert2.GetHash().ToString().c_str());
printf("%s", alert2.ToString().c_str());
printf("vchMsg=%s\n", HexStr(alert2.vchMsg).c_str());
printf("vchSig=%s\n", HexStr(alert2.vchSig).c_str());
// Confirm
if (!mapArgs.count("-sendalert"))
return;
while (connman.GetNodeCount(CConnman::CONNECTIONS_ALL) == 0 && !ShutdownRequested())
MilliSleep(500);
if (ShutdownRequested())
return;
// Send
printf("ThreadSendAlert() : Sending alert\n");
int nSent = 0;
{
connman.ForEachNode([&alert2, &connman, &nSent](CNode* pnode) {
if (alert2.RelayTo(pnode, connman))
{
printf("ThreadSendAlert() : Sent alert to %s\n", pnode->addr.ToString().c_str());
nSent++;
}
});
}
printf("ThreadSendAlert() : Alert sent to %d nodes\n", nSent);
}
void ThreadSendAlert()
{
if (!mapArgs.count("-sendalert") && !mapArgs.count("-printalert"))
return;
MilliSleep(60*1000); // Wait a minute so we get connected
//
// Alerts are relayed around the network until nRelayUntil, flood
// filling to every node.
// After the relay time is past, new nodes are told about alerts
// when they connect to peers, until either nExpiration or
// the alert is cancelled by a newer alert.
// Nodes never save alerts to disk, they are in-memory-only.
//
CAlert alert;
alert.nRelayUntil = GetTime() + 15 * 60;
alert.nExpiration = GetTime() + 365 * 60 * 60;
alert.nID = 1000; // use https://github.com/zcash/zcash/wiki/specification#assigned-numbers to keep track of alert IDs
alert.nCancel = 0; // cancels previous messages up to this ID number
// These versions are protocol versions
// 170002 : 1.0.0
alert.nMinVer = 170002;
alert.nMaxVer = 170002;
//
// main.cpp:
// 1000 for Misc warnings like out of disk space and clock is wrong
// 2000 for longer invalid proof-of-work chain
// Higher numbers mean higher priority
// 4000 or higher will put the RPC into safe mode
alert.nPriority = 5000;
alert.strComment = "";
alert.strStatusBar = "URGENT: Upgrade required: see https://z.cash";
alert.strRPCError = "URGENT: Upgrade required: see https://z.cash";
// Set specific client version/versions here. If setSubVer is empty, no filtering on subver is done:
// alert.setSubVer.insert(std::string("/MagicBean:0.7.2/"));
// Sign
const CChainParams& chainparams = Params();
std::string networkID = chainparams.NetworkIDString();
bool fIsTestNet = networkID.compare("test") == 0;
std::vector<unsigned char> vchTmp(ParseHex(fIsTestNet ? pszTestNetPrivKey : pszPrivKey));
CPrivKey vchPrivKey(vchTmp.begin(), vchTmp.end());
CDataStream sMsg(SER_NETWORK, CLIENT_VERSION);
sMsg << *(CUnsignedAlert*)&alert;
alert.vchMsg = std::vector<unsigned char>(sMsg.begin(), sMsg.end());
CKey key;
if (!key.SetPrivKey(vchPrivKey, false))
{
printf("ThreadSendAlert() : key.SetPrivKey failed\n");
return;
}
if (!key.Sign(Hash(alert.vchMsg.begin(), alert.vchMsg.end()), alert.vchSig))
{
printf("ThreadSendAlert() : key.Sign failed\n");
return;
}
// Test
CDataStream sBuffer(SER_NETWORK, CLIENT_VERSION);
sBuffer << alert;
CAlert alert2;
sBuffer >> alert2;
if (!alert2.CheckSignature(chainparams.AlertKey()))
{
printf("ThreadSendAlert() : CheckSignature failed\n");
return;
}
assert(alert2.vchMsg == alert.vchMsg);
assert(alert2.vchSig == alert.vchSig);
alert.SetNull();
printf("\nThreadSendAlert:\n");
printf("hash=%s\n", alert2.GetHash().ToString().c_str());
printf("%s\n", alert2.ToString().c_str());
printf("vchMsg=%s\n", HexStr(alert2.vchMsg).c_str());
printf("vchSig=%s\n", HexStr(alert2.vchSig).c_str());
// Confirm
if (!mapArgs.count("-sendalert"))
return;
while (vNodes.size() < 1 && !ShutdownRequested())
MilliSleep(500);
if (ShutdownRequested())
return;
// Send
printf("ThreadSendAlert() : Sending alert\n");
int nSent = 0;
{
LOCK(cs_vNodes);
BOOST_FOREACH(CNode* pnode, vNodes)
{
if (alert2.RelayTo(pnode))
{
printf("ThreadSendAlert() : Sent alert to %s\n", pnode->addr.ToString().c_str());
nSent++;
}
}
}
printf("ThreadSendAlert() : Alert sent to %d nodes\n", nSent);
}
UniValue sendalert2(const UniValue& params, bool fHelp)
{
if (fHelp || params.size() != 7)
throw runtime_error(
// 0 1 2 3 4 5 6
"sendalert2 <privatekey> <id> <subverlist> <cancellist> <expire> <priority> <message>\n"
"\n"
"<privatekey> -> is hex string of alert master private key\n"
"<id> ---------> is the unique alert number\n"
"<subverlist> -> comma separated list of versions warning applies to\n"
"<cancellist> -> comma separated ids of alerts to cancel\n"
"<expire> -----> alert expiration in days\n"
"<priority> ---> integer, >1000->visible\n"
"<message> ---->is the alert text message\n"
"\n"
"Returns summary of what was done.");
CAlert alert;
CKey key;
alert.strStatusBar = params[6].get_str();
alert.nMinVer = PROTOCOL_VERSION;
alert.nMaxVer = PROTOCOL_VERSION;
alert.nPriority = params[5].get_int();
alert.nID = params[1].get_int();
alert.nVersion = PROTOCOL_VERSION;
alert.nRelayUntil = alert.nExpiration = GetAdjustedTime() + 24*60*60*params[4].get_int();
if(params[2].get_str().length())
{
std::vector<std::string> split_subver = split(params[2].get_str(), ",");
alert.setSubVer.insert(split_subver.begin(),split_subver.end());
}
if(params[3].get_str().length())
{
for(std::string &s : split(params[3].get_str(), ","))
{
int aver = RoundFromString(s, 0);
alert.setCancel.insert(aver);
}
}
CDataStream sMsg(SER_NETWORK, PROTOCOL_VERSION);
sMsg << (CUnsignedAlert)alert;
alert.vchMsg = vector<unsigned char>(sMsg.begin(), sMsg.end());
vector<unsigned char> vchPrivKey = ParseHex(params[0].get_str());
key.SetPrivKey(CPrivKey(vchPrivKey.begin(), vchPrivKey.end())); // if key is not correct openssl may crash
if (!key.Sign(Hash(alert.vchMsg.begin(), alert.vchMsg.end()), alert.vchSig))
throw runtime_error(
"Unable to sign alert, check private key?\n");
if(!alert.ProcessAlert())
throw runtime_error(
"Failed to process alert.\n");
// Relay alert
{
LOCK(cs_vNodes);
for (auto const& pnode : vNodes)
alert.RelayTo(pnode);
}
UniValue result(UniValue::VOBJ);
result.pushKV("Content", alert.ToString());
result.pushKV("Success", true);
return result;
}