171 lines
5.4 KiB
C++
171 lines
5.4 KiB
C++
// Copyright (c) 2016 The Zcash developers
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// Original code from: https://gist.github.com/laanwj/0e689cfa37b52bcbbb44
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/*
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To set up a new alert system
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----------------------------
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Create a new alert key pair:
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openssl ecparam -name secp256k1 -genkey -param_enc explicit -outform PEM -out data.pem
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Get the private key in hex:
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openssl ec -in data.pem -outform DER | tail -c 279 | xxd -p -c 279
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Get the public key in hex:
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openssl ec -in data.pem -pubout -outform DER | tail -c 65 | xxd -p -c 65
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Update the public keys found in chainparams.cpp.
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To send an alert message
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------------------------
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Copy the private keys into alertkeys.h.
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Modify the alert parameters, id and message found in this file.
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Build and run with -sendalert or -printalert.
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./zcashd -printtoconsole -sendalert
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One minute after starting up, the alert will be broadcast. It is then
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flooded through the network until the nRelayUntil time, and will be
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active until nExpiration OR the alert is cancelled.
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If you make a mistake, send another alert with nCancel set to cancel
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the bad alert.
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*/
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#include "main.h"
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#include "net.h"
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#include "alert.h"
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#include "init.h"
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#include "util.h"
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#include "utiltime.h"
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#include "key.h"
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#include "clientversion.h"
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#include "chainparams.h"
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#include "alertkeys.h"
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static const int64_t DAYS = 24 * 60 * 60;
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void ThreadSendAlert()
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{
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if (!mapArgs.count("-sendalert") && !mapArgs.count("-printalert"))
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return;
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MilliSleep(60*1000); // Wait a minute so we get connected
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//
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// Alerts are relayed around the network until nRelayUntil, flood
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// filling to every node.
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// After the relay time is past, new nodes are told about alerts
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// when they connect to peers, until either nExpiration or
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// the alert is cancelled by a newer alert.
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// Nodes never save alerts to disk, they are in-memory-only.
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//
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CAlert alert;
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alert.nRelayUntil = GetTime() + 15 * 60;
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alert.nExpiration = GetTime() + 10 * 365 * 24 * 60 * 60;
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alert.nID = 1005; // use https://github.com/zcash/zcash/wiki/specification#assigned-numbers to keep track of alert IDs
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alert.nCancel = 1004; // cancels previous messages up to this ID number
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// These versions are protocol versions
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// 170002 : 1.0.0
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alert.nMinVer = 170002;
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alert.nMaxVer = 170004;
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//
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// main.cpp:
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// 1000 for Misc warnings like out of disk space and clock is wrong
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// 2000 for longer invalid proof-of-work chain
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// Higher numbers mean higher priority
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// 4000 or higher will put the RPC into safe mode
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alert.nPriority = 4000;
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alert.strComment = "";
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alert.strStatusBar = "Your client is out of date and incompatible with the Overwinter network upgrade. Please update to a recent version of Zcash (1.1.0 or later).";
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alert.strRPCError = alert.strStatusBar;
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// Set specific client version/versions here. If setSubVer is empty, no filtering on subver is done:
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// alert.setSubVer.insert(std::string("/MagicBean:0.7.2/"));
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const std::vector<std::string> useragents = {}; //{"MagicBean", "BeanStalk", "AppleSeed", "EleosZcash"};
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BOOST_FOREACH(const std::string& useragent, useragents) {
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}
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// Sanity check
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assert(alert.strComment.length() <= 65536); // max length in alert.h
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assert(alert.strStatusBar.length() <= 256);
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assert(alert.strRPCError.length() <= 256);
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// Sign
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const CChainParams& chainparams = Params();
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std::string networkID = chainparams.NetworkIDString();
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bool fIsTestNet = networkID.compare("test") == 0;
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std::vector<unsigned char> vchTmp(ParseHex(fIsTestNet ? pszTestNetPrivKey : pszPrivKey));
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CPrivKey vchPrivKey(vchTmp.begin(), vchTmp.end());
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CDataStream sMsg(SER_NETWORK, CLIENT_VERSION);
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sMsg << *(CUnsignedAlert*)&alert;
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alert.vchMsg = std::vector<unsigned char>(sMsg.begin(), sMsg.end());
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CKey key;
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if (!key.SetPrivKey(vchPrivKey, false))
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{
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printf("ThreadSendAlert() : key.SetPrivKey failed\n");
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return;
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}
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if (!key.Sign(Hash(alert.vchMsg.begin(), alert.vchMsg.end()), alert.vchSig))
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{
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printf("ThreadSendAlert() : key.Sign failed\n");
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return;
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}
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// Test
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CDataStream sBuffer(SER_NETWORK, CLIENT_VERSION);
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sBuffer << alert;
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CAlert alert2;
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sBuffer >> alert2;
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if (!alert2.CheckSignature(chainparams.AlertKey()))
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{
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printf("ThreadSendAlert() : CheckSignature failed\n");
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return;
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}
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assert(alert2.vchMsg == alert.vchMsg);
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assert(alert2.vchSig == alert.vchSig);
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alert.SetNull();
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printf("\nThreadSendAlert:\n");
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printf("hash=%s\n", alert2.GetHash().ToString().c_str());
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printf("%s\n", alert2.ToString().c_str());
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printf("vchMsg=%s\n", HexStr(alert2.vchMsg).c_str());
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printf("vchSig=%s\n", HexStr(alert2.vchSig).c_str());
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// Confirm
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if (!mapArgs.count("-sendalert"))
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return;
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while (vNodes.size() < 1 && !ShutdownRequested())
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MilliSleep(500);
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if (ShutdownRequested())
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return;
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// Send
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printf("ThreadSendAlert() : Sending alert\n");
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int nSent = 0;
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{
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LOCK(cs_vNodes);
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BOOST_FOREACH(CNode* pnode, vNodes)
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{
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if (alert2.RelayTo(pnode))
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{
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printf("ThreadSendAlert() : Sent alert to %s\n", pnode->addr.ToString().c_str());
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nSent++;
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}
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}
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}
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printf("ThreadSendAlert() : Alert sent to %d nodes\n", nSent);
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}
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