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Moved checkpoints out of main, to prep for using them to help prevent DoS attacks

tags/v0.15.1
Gavin Andresen 9 years ago
parent
commit
eb5fff9e16

+ 2
- 0
bitcoin-qt.pro View File

@@ -88,6 +88,7 @@ HEADERS += src/qt/bitcoingui.h \
src/qt/bitcoinaddressvalidator.h \
src/base58.h \
src/bignum.h \
src/checkpoints.h \
src/util.h \
src/uint256.h \
src/serialize.h \
@@ -152,6 +153,7 @@ SOURCES += src/qt/bitcoin.cpp src/qt/bitcoingui.cpp \
src/init.cpp \
src/net.cpp \
src/irc.cpp \
src/checkpoints.cpp \
src/db.cpp \
src/json/json_spirit_writer.cpp \
src/json/json_spirit_value.cpp \

+ 43
- 0
src/checkpoints.cpp View File

@@ -0,0 +1,43 @@
// Copyright (c) 2011 The Bitcoin developers
// Distributed under the MIT/X11 software license, see the accompanying
// file license.txt or http://www.opensource.org/licenses/mit-license.php.

#include "checkpoints.h"
#include "uint256.h"
#include "util.h"

#include <boost/assign/list_of.hpp> // for 'map_list_of()'

namespace Checkpoints
{
typedef std::map<int, uint256> MapCheckpoints;

static MapCheckpoints mapCheckpoints =
boost::assign::map_list_of
( 11111, uint256("0x0000000069e244f73d78e8fd29ba2fd2ed618bd6fa2ee92559f542fdb26e7c1d"))
( 33333, uint256("0x000000002dd5588a74784eaa7ab0507a18ad16a236e7b1ce69f00d7ddfb5d0a6"))
( 68555, uint256("0x00000000001e1b4903550a0b96e9a9405c8a95f387162e4944e8d9fbe501cd6a"))
( 70567, uint256("0x00000000006a49b14bcf27462068f1264c961f11fa2e0eddd2be0791e1d4124a"))
( 74000, uint256("0x0000000000573993a3c9e41ce34471c079dcf5f52a0e824a81e7f953b8661a20"))
(105000, uint256("0x00000000000291ce28027faea320c8d2b054b2e0fe44a773f3eefb151d6bdc97"))
(118000, uint256("0x000000000000774a7f8a7a12dc906ddb9e17e75d684f15e00f8767f9e8f36553"))
(134444, uint256("0x00000000000005b12ffd4cd315cd34ffd4a594f430ac814c91184a0d42d2b0fe"))
(140700, uint256("0x000000000000033b512028abb90e1626d8b346fd0ed598ac0a3c371138dce2bd"))
;

bool CheckBlock(int nHeight, const uint256& hash)
{
if (fTestNet) return true; // Testnet has no checkpoints

MapCheckpoints::const_iterator i = mapCheckpoints.find(nHeight);
if (i == mapCheckpoints.end()) return true;
return hash == i->second;
}

int GetTotalBlocksEstimate()
{
if (fTestNet) return 0; // Testnet has no checkpoints

return mapCheckpoints.rbegin()->first;
}
}

+ 22
- 0
src/checkpoints.h View File

@@ -0,0 +1,22 @@
// Copyright (c) 2011 The Bitcoin developers
// Distributed under the MIT/X11 software license, see the accompanying
// file license.txt or http://www.opensource.org/licenses/mit-license.php.
#ifndef BITCOIN_CHECKPOINT_H
#define BITCOIN_CHECKPOINT_H

class uint256;

//
// Block-chain checkpoints are compiled-in sanity checks.
// They are updated every release or three.
//
namespace Checkpoints
{
// Returns true if block passes checkpoint checks
bool CheckBlock(int nHeight, const uint256& hash);

// Return conservative estimate of total number of blocks, 0 if unknown
int GetTotalBlocksEstimate();
}

#endif

+ 5
- 27
src/main.cpp View File

@@ -3,6 +3,7 @@
// Distributed under the MIT/X11 software license, see the accompanying
// file license.txt or http://www.opensource.org/licenses/mit-license.php.
#include "headers.h"
#include "checkpoints.h"
#include "db.h"
#include "net.h"
#include "init.h"
@@ -29,7 +30,6 @@ map<COutPoint, CInPoint> mapNextTx;
map<uint256, CBlockIndex*> mapBlockIndex;
uint256 hashGenesisBlock("0x000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f");
static CBigNum bnProofOfWorkLimit(~uint256(0) >> 32);
const int nTotalBlocksEstimate = 140700; // Conservative estimate of total nr of blocks on main chain
const int nInitialBlockThreshold = 120; // Regard blocks up until N-threshold as "initial download"
CBlockIndex* pindexGenesisBlock = NULL;
int nBestHeight = -1;
@@ -721,28 +721,15 @@ bool CheckProofOfWork(uint256 hash, unsigned int nBits)
return true;
}

// Return conservative estimate of total number of blocks, 0 if unknown
int GetTotalBlocksEstimate()
{
if(fTestNet)
{
return 0;
}
else
{
return nTotalBlocksEstimate;
}
}

// Return maximum amount of blocks that other nodes claim to have
int GetNumBlocksOfPeers()
{
return std::max(cPeerBlockCounts.median(), GetTotalBlocksEstimate());
return std::max(cPeerBlockCounts.median(), Checkpoints::GetTotalBlocksEstimate());
}

bool IsInitialBlockDownload()
{
if (pindexBest == NULL || nBestHeight < (GetTotalBlocksEstimate()-nInitialBlockThreshold))
if (pindexBest == NULL || nBestHeight < (Checkpoints::GetTotalBlocksEstimate()-nInitialBlockThreshold))
return true;
static int64 nLastUpdate;
static CBlockIndex* pindexLastBest;
@@ -1317,17 +1304,8 @@ bool CBlock::AcceptBlock()
return DoS(10, error("AcceptBlock() : contains a non-final transaction"));

// Check that the block chain matches the known block chain up to a checkpoint
if (!fTestNet)
if ((nHeight == 11111 && hash != uint256("0x0000000069e244f73d78e8fd29ba2fd2ed618bd6fa2ee92559f542fdb26e7c1d")) ||
(nHeight == 33333 && hash != uint256("0x000000002dd5588a74784eaa7ab0507a18ad16a236e7b1ce69f00d7ddfb5d0a6")) ||
(nHeight == 68555 && hash != uint256("0x00000000001e1b4903550a0b96e9a9405c8a95f387162e4944e8d9fbe501cd6a")) ||
(nHeight == 70567 && hash != uint256("0x00000000006a49b14bcf27462068f1264c961f11fa2e0eddd2be0791e1d4124a")) ||
(nHeight == 74000 && hash != uint256("0x0000000000573993a3c9e41ce34471c079dcf5f52a0e824a81e7f953b8661a20")) ||
(nHeight == 105000 && hash != uint256("0x00000000000291ce28027faea320c8d2b054b2e0fe44a773f3eefb151d6bdc97")) ||
(nHeight == 118000 && hash != uint256("0x000000000000774a7f8a7a12dc906ddb9e17e75d684f15e00f8767f9e8f36553")) ||
(nHeight == 134444 && hash != uint256("0x00000000000005b12ffd4cd315cd34ffd4a594f430ac814c91184a0d42d2b0fe")) ||
(nHeight == 140700 && hash != uint256("0x000000000000033b512028abb90e1626d8b346fd0ed598ac0a3c371138dce2bd")))
return DoS(100, error("AcceptBlock() : rejected by checkpoint lockin at %d", nHeight));
if (!Checkpoints::CheckBlock(nHeight, hash))
return DoS(100, error("AcceptBlock() : rejected by checkpoint lockin at %d", nHeight));

// Write block to history file
if (!CheckDiskSpace(::GetSerializeSize(*this, SER_DISK)))

+ 0
- 1
src/main.h View File

@@ -99,7 +99,6 @@ void IncrementExtraNonce(CBlock* pblock, CBlockIndex* pindexPrev, unsigned int&
void FormatHashBuffers(CBlock* pblock, char* pmidstate, char* pdata, char* phash1);
bool CheckWork(CBlock* pblock, CWallet& wallet, CReserveKey& reservekey);
bool CheckProofOfWork(uint256 hash, unsigned int nBits);
int GetTotalBlocksEstimate();
int GetNumBlocksOfPeers();
bool IsInitialBlockDownload();
std::string GetWarnings(std::string strFor);

+ 2
- 0
src/makefile.linux-mingw View File

@@ -32,6 +32,7 @@ CFLAGS=-O2 -w -Wno-invalid-offsetof -Wformat $(DEBUGFLAGS) $(DEFS) $(INCLUDEPATH
HEADERS = \
base58.h \
bignum.h \
checkpoints.h \
crypter.h \
db.h \
headers.h \
@@ -61,6 +62,7 @@ endif
LIBS += -l mingwthrd -l kernel32 -l user32 -l gdi32 -l comdlg32 -l winspool -l winmm -l shell32 -l comctl32 -l ole32 -l oleaut32 -l uuid -l rpcrt4 -l advapi32 -l ws2_32 -l shlwapi

OBJS= \
obj/checkpoints.o \
obj/crypter.o \
obj/db.o \
obj/init.o \

+ 2
- 0
src/makefile.mingw View File

@@ -29,6 +29,7 @@ CFLAGS=-mthreads -O2 -w -Wno-invalid-offsetof -Wformat $(DEBUGFLAGS) $(DEFS) $(I
HEADERS = \
base58.h \
bignum.h \
checkpoints.h \
crypter.h \
db.h \
headers.h \
@@ -58,6 +59,7 @@ endif
LIBS += -l kernel32 -l user32 -l gdi32 -l comdlg32 -l winspool -l winmm -l shell32 -l comctl32 -l ole32 -l oleaut32 -l uuid -l rpcrt4 -l advapi32 -l ws2_32 -l shlwapi

OBJS= \
obj/checkpoints.o \
obj/crypter.o \
obj/db.o \
obj/init.o \

+ 2
- 0
src/makefile.osx View File

@@ -49,6 +49,7 @@ CFLAGS=-mmacosx-version-min=10.5 -arch i386 -O3 -Wno-invalid-offsetof -Wformat $
HEADERS = \
base58.h \
bignum.h \
checkpoints.h \
crypter.h \
db.h \
headers.h \
@@ -69,6 +70,7 @@ HEADERS = \
wallet.h

OBJS= \
obj/checkpoints.o \
obj/crypter.o \
obj/db.o \
obj/init.o \

+ 2
- 0
src/makefile.unix View File

@@ -87,6 +87,7 @@ xCXXFLAGS=-pthread -Wno-invalid-offsetof -Wformat $(DEBUGFLAGS) $(DEFS) $(HARDEN
HEADERS = \
base58.h \
bignum.h \
checkpoints.h \
crypter.h \
db.h \
headers.h \
@@ -107,6 +108,7 @@ HEADERS = \
wallet.h

OBJS= \
obj/checkpoints.o \
obj/crypter.o \
obj/db.o \
obj/init.o \

+ 6
- 0
src/makefile.vc View File

@@ -43,6 +43,7 @@ CFLAGS=/MD /c /nologo /EHsc /GR /Zm300 $(DEBUGFLAGS) $(DEFS) $(INCLUDEPATHS)
HEADERS = \
base58.h \
bignum.h \
checkpoints.h \
crypter.h \
db.h \
headers.h \
@@ -65,6 +66,7 @@ HEADERS = \
wallet.h

OBJS= \
obj\checkpoints.o \
obj\crypter.o \
obj\db.o \
obj\init.o \
@@ -87,6 +89,8 @@ all: bitcoind.exe
.cpp{obj}.obj:
cl $(CFLAGS) /DGUI /Fo$@ %s

obj\checkpoints.obj: $(HEADERS)

obj\util.obj: $(HEADERS)

obj\script.obj: $(HEADERS)
@@ -116,6 +120,8 @@ obj\uibase.obj: $(HEADERS)
.cpp{obj\nogui}.obj:
cl $(CFLAGS) /Fo$@ %s

obj\nogui\checkpoints.obj: $(HEADERS)

obj\nogui\util.obj: $(HEADERS)

obj\nogui\script.obj: $(HEADERS)

+ 34
- 0
src/test/Checkpoints_tests.cpp View File

@@ -0,0 +1,34 @@
//
// Unit tests for block-chain checkpoints
//
#include <boost/assign/list_of.hpp> // for 'map_list_of()'
#include <boost/test/unit_test.hpp>
#include <boost/foreach.hpp>

#include "../checkpoints.h"
#include "../util.h"

using namespace std;

BOOST_AUTO_TEST_SUITE(Checkpoints_tests)

BOOST_AUTO_TEST_CASE(sanity)
{
uint256 p11111 = uint256("0x0000000069e244f73d78e8fd29ba2fd2ed618bd6fa2ee92559f542fdb26e7c1d");
uint256 p140700 = uint256("0x000000000000033b512028abb90e1626d8b346fd0ed598ac0a3c371138dce2bd");
BOOST_CHECK(Checkpoints::CheckBlock(11111, p11111));
BOOST_CHECK(Checkpoints::CheckBlock(140700, p140700));

// Wrong hashes at checkpoints should fail:
BOOST_CHECK(!Checkpoints::CheckBlock(11111, p140700));
BOOST_CHECK(!Checkpoints::CheckBlock(140700, p11111));

// ... but any hash not at a checkpoint should succeed:
BOOST_CHECK(Checkpoints::CheckBlock(11111+1, p140700));
BOOST_CHECK(Checkpoints::CheckBlock(140700+1, p11111));

BOOST_CHECK(Checkpoints::GetTotalBlocksEstimate() >= 140700);
}

BOOST_AUTO_TEST_SUITE_END()

+ 0
- 1
src/test/DoS_tests.cpp View File

@@ -64,5 +64,4 @@ BOOST_AUTO_TEST_CASE(DoS_bantime)
BOOST_CHECK(!CNode::IsBanned(addr.ip));
}


BOOST_AUTO_TEST_SUITE_END()

+ 1
- 0
src/test/test_bitcoin.cpp View File

@@ -13,6 +13,7 @@
#include "util_tests.cpp"
#include "base58_tests.cpp"
#include "miner_tests.cpp"
#include "Checkpoints_tests.cpp"

CWallet* pwalletMain;


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