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fixed segfault in bignum.h,

Browse source 
additional security limits,
refactoring
-- version 0.3.7

git-svn-id: https://bitcoin.svn.sourceforge.net/svnroot/bitcoin/trunk@121 1a98c847-1fd6-4fd8-948a-caf3550aa51b
This commit is contained in:
s_nakamoto 2010-07-31 19:15:48 +00:00
parent 01bed1828b
commit 6ff5f718b6
6 changed files with 39 additions and 24 deletions
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18
bignum.h
View file

@ -401,8 +401,16 @@ public:
CBigNum& operator>>=(unsigned int shift)
{
// Note: BN_rshift segfaults on 64-bit ubuntu 9.10 if 2^shift is greater than the number,
// tested OK on 64-bit ubuntu 10.4
// Note: BN_rshift segfaults on 64-bit if 2^shift is greater than the number
// if built on ubuntu 9.04 or 9.10, probably depends on version of openssl
CBigNum a = 1;
a <<= shift;
if (BN_cmp(&a, this) > 0)
{
*this = 0;
return *this;
}
if (!BN_rshift(this, this, shift))
throw bignum_error("CBigNum:operator>>= : BN_rshift failed");
return *this;
@ -511,10 +519,8 @@ inline const CBigNum operator<<(const CBigNum& a, unsigned int shift)
inline const CBigNum operator>>(const CBigNum& a, unsigned int shift)
{
CBigNum r;
// Note: BN_rshift segfaults on 64-bit ubuntu 9.10 if 2^shift is greater than the number
if (!BN_rshift(&r, &a, shift))
throw bignum_error("CBigNum:operator>> : BN_rshift failed");
CBigNum r = a;
r >>= shift;
return r;
}

3
main.cpp
View file

@ -3036,7 +3036,8 @@ bool CreateTransaction(CScript scriptPubKey, int64 nValue, CWalletTx& wtxNew, CK
foreach(CWalletTx* pcoin, setCoins)
for (int nOut = 0; nOut < pcoin->vout.size(); nOut++)
if (pcoin->vout[nOut].IsMine())
SignSignature(*pcoin, wtxNew, nIn++);
if (!SignSignature(*pcoin, wtxNew, nIn++))
return false;
// Check that enough fee is included
if (nFee < wtxNew.GetMinFee())

32
script.cpp
View file

@ -42,20 +42,17 @@ void MakeSameSize(valtype& vch1, valtype& vch2)
#define stacktop(i) (stack.at(stack.size()+(i)))
#define altstacktop(i) (altstack.at(altstack.size()+(i)))
bool EvalScript(const CScript& script, const CTransaction& txTo, unsigned int nIn, int nHashType,
vector<vector<unsigned char> >* pvStackRet)
bool EvalScript(vector<vector<unsigned char> >& stack, const CScript& script, const CTransaction& txTo, unsigned int nIn, int nHashType)
{
CAutoBN_CTX pctx;
CScript::const_iterator pc = script.begin();
CScript::const_iterator pend = script.end();
CScript::const_iterator pbegincodehash = script.begin();
vector<bool> vfExec;
vector<valtype> stack;
vector<valtype> altstack;
if (pvStackRet)
pvStackRet->clear();
if (script.size() > 20000)
if (script.size() > 10000)
return false;
int nOpCount = 0;
try
@ -73,6 +70,8 @@ bool EvalScript(const CScript& script, const CTransaction& txTo, unsigned int nI
return false;
if (vchPushValue.size() > 5000)
return false;
if (opcode > OP_16 && nOpCount++ > 200)
return false;
if (fExec && opcode <= OP_PUSHDATA4)
stack.push_back(vchPushValue);
@ -828,9 +827,7 @@ bool EvalScript(const CScript& script, const CTransaction& txTo, unsigned int nI
if (!vfExec.empty())
return false;
if (pvStackRet)
*pvStackRet = stack;
return (stack.empty() ? false : CastToBool(stack.back()));
return true;
}
#undef top
@ -1114,6 +1111,19 @@ bool ExtractHash160(const CScript& scriptPubKey, uint160& hash160Ret)
}
bool VerifyScript(const CScript& scriptSig, const CScript& scriptPubKey, const CTransaction& txTo, unsigned int nIn, int nHashType)
{
vector<vector<unsigned char> > stack;
if (!EvalScript(stack, scriptSig, txTo, nIn, nHashType))
return false;
if (!EvalScript(stack, scriptPubKey, txTo, nIn, nHashType))
return false;
if (stack.empty())
return false;
return CastToBool(stack.back());
}
bool SignSignature(const CTransaction& txFrom, CTransaction& txTo, unsigned int nIn, int nHashType, CScript scriptPrereq)
{
assert(nIn < txTo.vin.size());
@ -1132,7 +1142,7 @@ bool SignSignature(const CTransaction& txFrom, CTransaction& txTo, unsigned int
// Test solution
if (scriptPrereq.empty())
if (!EvalScript(txin.scriptSig + CScript(OP_CODESEPARATOR) + txout.scriptPubKey, txTo, nIn))
if (!VerifyScript(txin.scriptSig, txout.scriptPubKey, txTo, nIn, 0))
return false;
return true;
@ -1150,7 +1160,7 @@ bool VerifySignature(const CTransaction& txFrom, const CTransaction& txTo, unsig
if (txin.prevout.hash != txFrom.GetHash())
return false;
if (!EvalScript(txin.scriptSig + CScript(OP_CODESEPARATOR) + txout.scriptPubKey, txTo, nIn, nHashType))
if (!VerifyScript(txin.scriptSig, txout.scriptPubKey, txTo, nIn, nHashType))
return false;
// Anytime a signature is successfully verified, it's proof the outpoint is spent,

2
script.h
View file

@ -657,8 +657,6 @@ public:
bool EvalScript(const CScript& script, const CTransaction& txTo, unsigned int nIn, int nHashType=0,
vector<vector<unsigned char> >* pvStackRet=NULL);
uint256 SignatureHash(CScript scriptCode, const CTransaction& txTo, unsigned int nIn, int nHashType);
bool IsMine(const CScript& scriptPubKey);
bool ExtractPubKey(const CScript& scriptPubKey, bool fMineOnly, vector<unsigned char>& vchPubKeyRet);

2
serialize.h
View file

@ -19,7 +19,7 @@ class CScript;
class CDataStream;
class CAutoFile;
static const int VERSION = 306;
static const int VERSION = 307;
static const char* pszSubVer = "";

6
setup.nsi
View file

@ -7,7 +7,7 @@ RequestExecutionLevel highest
# General Symbol Definitions
!define REGKEY "SOFTWARE\$(^Name)"
!define VERSION 0.3.6
!define VERSION 0.3.7
!define COMPANY "Bitcoin project"
!define URL http://www.bitcoin.org/
@ -42,12 +42,12 @@ Var StartMenuGroup
!insertmacro MUI_LANGUAGE English
# Installer attributes
OutFile bitcoin-0.3.6-win32-setup.exe
OutFile bitcoin-0.3.7-win32-setup.exe
InstallDir $PROGRAMFILES\Bitcoin
CRCCheck on
XPStyle on
ShowInstDetails show
VIProductVersion 0.3.6.0
VIProductVersion 0.3.7.0
VIAddVersionKey ProductName Bitcoin
VIAddVersionKey ProductVersion "${VERSION}"
VIAddVersionKey CompanyName "${COMPANY}"