// Copyright (c) 2009-2010 Satoshi Nakamoto
+// Copyright (c) 2009-2012 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.
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#ifndef BITCOIN_BIGNUM_H
#define BITCOIN_BIGNUM_H
#include <vector>
#include <openssl/bn.h>
-#include "util.h"
+#include "util.h" // for uint64
+/** Errors thrown by the bignum class */
class bignum_error : public std::runtime_error
{
public:
};
-
+/** RAII encapsulated BN_CTX (OpenSSL bignum context) */
class CAutoBN_CTX
{
protected:
};
-
+/** C++ wrapper for BIGNUM (OpenSSL bignum) */
class CBigNum : public BIGNUM
{
public:
BN_clear_free(this);
}
- CBigNum(char n) { BN_init(this); if (n >= 0) setulong(n); else setint64(n); }
+ //CBigNum(char n) is not portable. Use 'signed char' or 'unsigned char'.
+ CBigNum(signed char n) { BN_init(this); if (n >= 0) setulong(n); else setint64(n); }
CBigNum(short n) { BN_init(this); if (n >= 0) setulong(n); else setint64(n); }
CBigNum(int n) { BN_init(this); if (n >= 0) setulong(n); else setint64(n); }
CBigNum(long n) { BN_init(this); if (n >= 0) setulong(n); else setint64(n); }
{
unsigned long n = BN_get_word(this);
if (!BN_is_negative(this))
- return (n > INT_MAX ? INT_MAX : n);
+ return (n > (unsigned long)std::numeric_limits<int>::max() ? std::numeric_limits<int>::max() : n);
else
- return (n > INT_MAX ? INT_MIN : -(int)n);
+ return (n > (unsigned long)std::numeric_limits<int>::max() ? std::numeric_limits<int>::min() : -(int)n);
}
void setint64(int64 n)
BN_mpi2bn(pch, p - pch, this);
}
+ uint64 getuint64()
+ {
+ unsigned int nSize = BN_bn2mpi(this, NULL);
+ if (nSize < 4)
+ return 0;
+ std::vector<unsigned char> vch(nSize);
+ BN_bn2mpi(this, &vch[0]);
+ if (vch.size() > 4)
+ vch[4] &= 0x7f;
+ uint64 n = 0;
+ for (int i = 0, j = vch.size()-1; i < sizeof(n) && j >= 4; i++, j--)
+ ((unsigned char*)&n)[i] = vch[j];
+ return n;
+ }
+
void setuint256(uint256 n)
{
unsigned char pch[sizeof(n) + 6];
if (vch.size() > 4)
vch[4] &= 0x7f;
uint256 n = 0;
- for (int i = 0, j = vch.size()-1; i < sizeof(n) && j >= 4; i++, j--)
+ for (unsigned int i = 0, j = vch.size()-1; i < sizeof(n) && j >= 4; i++, j--)
((unsigned char*)&n)[i] = vch[j];
return n;
}
std::vector<unsigned char> getvch() const
{
unsigned int nSize = BN_bn2mpi(this, NULL);
- if (nSize < 4)
+ if (nSize <= 4)
return std::vector<unsigned char>();
std::vector<unsigned char> vch(nSize);
BN_bn2mpi(this, &vch[0]);
psz++;
// hex string to bignum
- static char phexdigit[256] = { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,1,2,3,4,5,6,7,8,9,0,0,0,0,0,0, 0,0xa,0xb,0xc,0xd,0xe,0xf,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0xa,0xb,0xc,0xd,0xe,0xf,0,0,0,0,0,0,0,0,0 };
+ static signed char phexdigit[256] = { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,1,2,3,4,5,6,7,8,9,0,0,0,0,0,0, 0,0xa,0xb,0xc,0xd,0xe,0xf,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0xa,0xb,0xc,0xd,0xe,0xf,0,0,0,0,0,0,0,0,0 };
*this = 0;
while (isxdigit(*psz))
{
*this <<= 4;
- int n = phexdigit[*psz++];
+ int n = phexdigit[(unsigned char)*psz++];
*this += n;
}
if (fNegative)
return ToString(16);
}
- unsigned int GetSerializeSize(int nType=0, int nVersion=VERSION) const
+ unsigned int GetSerializeSize(int nType=0, int nVersion=PROTOCOL_VERSION) const
{
return ::GetSerializeSize(getvch(), nType, nVersion);
}
template<typename Stream>
- void Serialize(Stream& s, int nType=0, int nVersion=VERSION) const
+ void Serialize(Stream& s, int nType=0, int nVersion=PROTOCOL_VERSION) const
{
::Serialize(s, getvch(), nType, nVersion);
}
template<typename Stream>
- void Unserialize(Stream& s, int nType=0, int nVersion=VERSION)
+ void Unserialize(Stream& s, int nType=0, int nVersion=PROTOCOL_VERSION)
{
std::vector<unsigned char> vch;
::Unserialize(s, vch, nType, nVersion);