121 lines
3.3 KiB
C++
121 lines
3.3 KiB
C++
#pragma once
|
|
#ifndef BLOCKSTORE_UTILS_data_H_
|
|
#define BLOCKSTORE_UTILS_data_H_
|
|
|
|
#include <cryptopp/cryptopp/hex.h>
|
|
#include <cryptopp/cryptopp/osrng.h>
|
|
#include <string>
|
|
#include <cstring>
|
|
|
|
namespace blockstore {
|
|
|
|
template<int SIZE>
|
|
class FixedSizeData {
|
|
public:
|
|
FixedSizeData() {}
|
|
//Non-virtual destructor because we want objects to be small
|
|
~FixedSizeData() {}
|
|
|
|
static constexpr unsigned int BINARY_LENGTH = SIZE;
|
|
static constexpr unsigned int STRING_LENGTH = 2 * BINARY_LENGTH; // Hex encoding
|
|
|
|
static FixedSizeData<SIZE> CreateRandom();
|
|
|
|
static FixedSizeData<SIZE> FromString(const std::string &data);
|
|
std::string ToString() const;
|
|
|
|
static FixedSizeData<SIZE> FromBinary(const void *source);
|
|
void ToBinary(void *target) const;
|
|
|
|
const unsigned char *data() const;
|
|
|
|
private:
|
|
static CryptoPP::AutoSeededRandomPool &RandomPool();
|
|
|
|
unsigned char _data[BINARY_LENGTH];
|
|
};
|
|
|
|
template<int SIZE> bool operator==(const FixedSizeData<SIZE> &lhs, const FixedSizeData<SIZE> &rhs);
|
|
template<int SIZE> bool operator!=(const FixedSizeData<SIZE> &lhs, const FixedSizeData<SIZE> &rhs);
|
|
|
|
//operator< is defined, so that FixedSizeData objects can be used in std::map and std::set
|
|
template<int SIZE> bool operator<(const FixedSizeData<SIZE> &lhs, const FixedSizeData<SIZE> &rhs);
|
|
|
|
// ----- Implementation -----
|
|
|
|
template<int SIZE> constexpr unsigned int FixedSizeData<SIZE>::BINARY_LENGTH;
|
|
template<int SIZE> constexpr unsigned int FixedSizeData<SIZE>::STRING_LENGTH;
|
|
|
|
template<int SIZE>
|
|
CryptoPP::AutoSeededRandomPool &FixedSizeData<SIZE>::RandomPool() {
|
|
static CryptoPP::AutoSeededRandomPool singleton;
|
|
return singleton;
|
|
}
|
|
|
|
template<int SIZE>
|
|
FixedSizeData<SIZE> FixedSizeData<SIZE>::CreateRandom() {
|
|
FixedSizeData<SIZE> result;
|
|
RandomPool().GenerateBlock(result._data, BINARY_LENGTH);
|
|
return result;
|
|
}
|
|
|
|
template<int SIZE>
|
|
FixedSizeData<SIZE> FixedSizeData<SIZE>::FromString(const std::string &data) {
|
|
assert(data.size() == STRING_LENGTH);
|
|
FixedSizeData<SIZE> result;
|
|
CryptoPP::StringSource(data, true,
|
|
new CryptoPP::HexDecoder(
|
|
new CryptoPP::ArraySink(result._data, BINARY_LENGTH)
|
|
)
|
|
);
|
|
return result;
|
|
}
|
|
|
|
template<int SIZE>
|
|
std::string FixedSizeData<SIZE>::ToString() const {
|
|
std::string result;
|
|
CryptoPP::ArraySource(_data, BINARY_LENGTH, true,
|
|
new CryptoPP::HexEncoder(
|
|
new CryptoPP::StringSink(result)
|
|
)
|
|
);
|
|
assert(result.size() == STRING_LENGTH);
|
|
return result;
|
|
}
|
|
|
|
template<int SIZE>
|
|
const unsigned char *FixedSizeData<SIZE>::data() const {
|
|
return _data;
|
|
}
|
|
|
|
template<int SIZE>
|
|
void FixedSizeData<SIZE>::ToBinary(void *target) const {
|
|
std::memcpy(target, _data, BINARY_LENGTH);
|
|
}
|
|
|
|
template<int SIZE>
|
|
FixedSizeData<SIZE> FixedSizeData<SIZE>::FromBinary(const void *source) {
|
|
FixedSizeData<SIZE> result;
|
|
std::memcpy(result._data, source, BINARY_LENGTH);
|
|
return result;
|
|
}
|
|
|
|
template<int SIZE>
|
|
bool operator==(const FixedSizeData<SIZE> &lhs, const FixedSizeData<SIZE> &rhs) {
|
|
return 0 == std::memcmp(lhs.data(), rhs.data(), FixedSizeData<SIZE>::BINARY_LENGTH);
|
|
}
|
|
|
|
template<int SIZE>
|
|
bool operator!=(const FixedSizeData<SIZE> &lhs, const FixedSizeData<SIZE> &rhs) {
|
|
return !operator==(lhs, rhs);
|
|
}
|
|
|
|
template<int SIZE>
|
|
bool operator<(const FixedSizeData<SIZE> &lhs, const FixedSizeData<SIZE> &rhs) {
|
|
return 0 > std::memcmp(lhs.data(), rhs.data(), FixedSizeData<SIZE>::BINARY_LENGTH);
|
|
}
|
|
|
|
}
|
|
|
|
#endif
|