// 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.
#ifndef BITCOIN_BIGNUM_H
#include "util.h"
+/** 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:
{
unsigned long n = BN_get_word(this);
if (!BN_is_negative(this))
- return (n > INT_MAX ? INT_MAX : n);
+ return (n > std::numeric_limits<int>::max() ? std::numeric_limits<int>::max() : n);
else
- return (n > INT_MAX ? INT_MIN : -(int)n);
+ return (n > std::numeric_limits<int>::max() ? std::numeric_limits<int>::min() : -(int)n);
}
void setint64(int64 n)
{
std::vector<unsigned char> vch2(vch.size() + 4);
unsigned int nSize = vch.size();
+ // BIGNUM's byte stream format expects 4 bytes of
+ // big endian size data info at the front
vch2[0] = (nSize >> 24) & 0xff;
vch2[1] = (nSize >> 16) & 0xff;
vch2[2] = (nSize >> 8) & 0xff;
vch2[3] = (nSize >> 0) & 0xff;
+ // swap data to big endian
reverse_copy(vch.begin(), vch.end(), vch2.begin() + 4);
BN_mpi2bn(&vch2[0], vch2.size(), this);
}
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]);
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);