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// Copyright (c) 2017-2020, The Monero Project
//
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without modification, are
// permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this list of
// conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright notice, this list
// of conditions and the following disclaimer in the documentation and/or other
// materials provided with the distribution.
//
// 3. Neither the name of the copyright holder nor the names of its contributors may be
// used to endorse or promote products derived from this software without specific
// prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#pragma once
#include <boost/optional/optional.hpp>
#include <stddef.h>
#include <vector>
#include <string>
#include "memwipe.h"
#include "fnv1.h"
namespace epee
{
class wipeable_string
{
public:
typedef char value_type;
wipeable_string() {}
wipeable_string(const wipeable_string &other);
wipeable_string(wipeable_string &&other);
wipeable_string(const std::string &other);
wipeable_string(std::string &&other);
wipeable_string(const char *s);
wipeable_string(const char *s, size_t len);
~wipeable_string();
void wipe();
void push_back(char c);
void operator+=(char c);
void operator+=(const std::string &s);
void operator+=(const epee::wipeable_string &s);
void operator+=(const char *s);
void append(const char *ptr, size_t len);
char pop_back();
const char *data() const noexcept { return buffer.data(); }
char *data() noexcept { return buffer.data(); }
size_t size() const noexcept { return buffer.size(); }
size_t length() const noexcept { return buffer.size(); }
bool empty() const noexcept { return buffer.empty(); }
void trim();
void split(std::vector<wipeable_string> &fields) const;
boost::optional<wipeable_string> parse_hexstr() const;
template<typename T> inline bool hex_to_pod(T &pod) const;
template<typename T> inline bool hex_to_pod(tools::scrubbed<T> &pod) const { return hex_to_pod(unwrap(pod)); }
void resize(size_t sz);
void reserve(size_t sz);
void clear();
bool operator==(const wipeable_string &other) const noexcept { return buffer == other.buffer; }
bool operator!=(const wipeable_string &other) const noexcept { return buffer != other.buffer; }
wipeable_string &operator=(wipeable_string &&other);
wipeable_string &operator=(const wipeable_string &other);
private:
void grow(size_t sz, size_t reserved = 0);
private:
std::vector<char> buffer;
};
template<typename T> inline bool wipeable_string::hex_to_pod(T &pod) const
{
static_assert(std::is_pod<T>::value, "expected pod type");
if (size() != sizeof(T) * 2)
return false;
boost::optional<epee::wipeable_string> blob = parse_hexstr();
if (!blob)
return false;
if (blob->size() != sizeof(T))
return false;
pod = *(const T*)blob->data();
return true;
}
}
namespace std
{
template<> struct hash<epee::wipeable_string>
{
size_t operator()(const epee::wipeable_string &s) const
{
return epee::fnv::FNV1a(s.data(), s.size());
}
};
}
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