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Diffstat (limited to 'src/test/bignum.h')
-rw-r--r-- | src/test/bignum.h | 180 |
1 files changed, 0 insertions, 180 deletions
diff --git a/src/test/bignum.h b/src/test/bignum.h deleted file mode 100644 index e7aeee9db6..0000000000 --- a/src/test/bignum.h +++ /dev/null @@ -1,180 +0,0 @@ -// Copyright (c) 2009-2010 Satoshi Nakamoto -// Copyright (c) 2009-2013 The Bitcoin Core developers -// Distributed under the MIT software license, see the accompanying -// file COPYING or http://www.opensource.org/licenses/mit-license.php. - -#ifndef BITCOIN_TEST_BIGNUM_H -#define BITCOIN_TEST_BIGNUM_H - -#include <algorithm> -#include <limits> -#include <stdexcept> -#include <stdint.h> -#include <string> -#include <vector> - -#include <openssl/bn.h> - -class bignum_error : public std::runtime_error -{ -public: - explicit bignum_error(const std::string& str) : std::runtime_error(str) {} -}; - - -/** C++ wrapper for BIGNUM (OpenSSL bignum) */ -class CBigNum : public BIGNUM -{ -public: - CBigNum() - { - BN_init(this); - } - - CBigNum(const CBigNum& b) - { - BN_init(this); - if (!BN_copy(this, &b)) - { - BN_clear_free(this); - throw bignum_error("CBigNum::CBigNum(const CBigNum&): BN_copy failed"); - } - } - - CBigNum& operator=(const CBigNum& b) - { - if (!BN_copy(this, &b)) - throw bignum_error("CBigNum::operator=: BN_copy failed"); - return (*this); - } - - ~CBigNum() - { - BN_clear_free(this); - } - - CBigNum(long long n) { BN_init(this); setint64(n); } - - explicit CBigNum(const std::vector<unsigned char>& vch) - { - BN_init(this); - setvch(vch); - } - - int getint() const - { - BN_ULONG n = BN_get_word(this); - if (!BN_is_negative(this)) - return (n > (BN_ULONG)std::numeric_limits<int>::max() ? std::numeric_limits<int>::max() : n); - else - return (n > (BN_ULONG)std::numeric_limits<int>::max() ? std::numeric_limits<int>::min() : -(int)n); - } - - void setint64(int64_t sn) - { - unsigned char pch[sizeof(sn) + 6]; - unsigned char* p = pch + 4; - bool fNegative; - uint64_t n; - - if (sn < (int64_t)0) - { - // Since the minimum signed integer cannot be represented as positive so long as its type is signed, - // and it's not well-defined what happens if you make it unsigned before negating it, - // we instead increment the negative integer by 1, convert it, then increment the (now positive) unsigned integer by 1 to compensate - n = -(sn + 1); - ++n; - fNegative = true; - } else { - n = sn; - fNegative = false; - } - - bool fLeadingZeroes = true; - for (int i = 0; i < 8; i++) - { - unsigned char c = (n >> 56) & 0xff; - n <<= 8; - if (fLeadingZeroes) - { - if (c == 0) - continue; - if (c & 0x80) - *p++ = (fNegative ? 0x80 : 0); - else if (fNegative) - c |= 0x80; - fLeadingZeroes = false; - } - *p++ = c; - } - unsigned int nSize = p - (pch + 4); - pch[0] = (nSize >> 24) & 0xff; - pch[1] = (nSize >> 16) & 0xff; - pch[2] = (nSize >> 8) & 0xff; - pch[3] = (nSize) & 0xff; - BN_mpi2bn(pch, p - pch, this); - } - - void setvch(const std::vector<unsigned char>& vch) - { - 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) - return std::vector<unsigned char>(); - std::vector<unsigned char> vch(nSize); - BN_bn2mpi(this, &vch[0]); - vch.erase(vch.begin(), vch.begin() + 4); - reverse(vch.begin(), vch.end()); - return vch; - } - - friend inline const CBigNum operator-(const CBigNum& a, const CBigNum& b); -}; - - - -inline const CBigNum operator+(const CBigNum& a, const CBigNum& b) -{ - CBigNum r; - if (!BN_add(&r, &a, &b)) - throw bignum_error("CBigNum::operator+: BN_add failed"); - return r; -} - -inline const CBigNum operator-(const CBigNum& a, const CBigNum& b) -{ - CBigNum r; - if (!BN_sub(&r, &a, &b)) - throw bignum_error("CBigNum::operator-: BN_sub failed"); - return r; -} - -inline const CBigNum operator-(const CBigNum& a) -{ - CBigNum r(a); - BN_set_negative(&r, !BN_is_negative(&r)); - return r; -} - -inline bool operator==(const CBigNum& a, const CBigNum& b) { return (BN_cmp(&a, &b) == 0); } -inline bool operator!=(const CBigNum& a, const CBigNum& b) { return (BN_cmp(&a, &b) != 0); } -inline bool operator<=(const CBigNum& a, const CBigNum& b) { return (BN_cmp(&a, &b) <= 0); } -inline bool operator>=(const CBigNum& a, const CBigNum& b) { return (BN_cmp(&a, &b) >= 0); } -inline bool operator<(const CBigNum& a, const CBigNum& b) { return (BN_cmp(&a, &b) < 0); } -inline bool operator>(const CBigNum& a, const CBigNum& b) { return (BN_cmp(&a, &b) > 0); } - -#endif // BITCOIN_TEST_BIGNUM_H |