2014-07-23 16:03:52 +03:00
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// Copyright (c) 2014, The Monero Project
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//
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without modification, are
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// permitted provided that the following conditions are met:
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//
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// 1. Redistributions of source code must retain the above copyright notice, this list of
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// conditions and the following disclaimer.
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//
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// 2. Redistributions in binary form must reproduce the above copyright notice, this list
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// of conditions and the following disclaimer in the documentation and/or other
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// materials provided with the distribution.
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//
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// 3. Neither the name of the copyright holder nor the names of its contributors may be
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// used to endorse or promote products derived from this software without specific
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// prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
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// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
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// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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// Parts of this file are originally copyright (c) 2012-2013 The Cryptonote developers
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2014-03-04 00:07:58 +02:00
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#include "password_container.h"
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#include <iostream>
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#include <memory.h>
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#include <stdio.h>
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#if defined(_WIN32)
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#include <io.h>
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#include <windows.h>
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#else
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#include <termios.h>
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#include <unistd.h>
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#endif
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namespace tools
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{
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namespace
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{
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bool is_cin_tty();
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}
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password_container::password_container()
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: m_empty(true)
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{
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}
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password_container::password_container(std::string&& password)
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: m_empty(false)
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, m_password(std::move(password))
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{
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}
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password_container::password_container(password_container&& rhs)
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: m_empty(std::move(rhs.m_empty))
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, m_password(std::move(rhs.m_password))
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{
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}
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password_container::~password_container()
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{
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clear();
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}
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void password_container::clear()
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{
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if (0 < m_password.capacity())
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{
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m_password.replace(0, m_password.capacity(), m_password.capacity(), '\0');
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m_password.resize(0);
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}
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m_empty = true;
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}
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bool password_container::read_password()
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{
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clear();
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bool r;
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if (is_cin_tty())
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{
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std::cout << "password: ";
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r = read_from_tty();
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}
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else
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{
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r = read_from_file();
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}
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if (r)
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{
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m_empty = false;
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}
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else
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{
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clear();
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}
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return r;
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}
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bool password_container::read_from_file()
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{
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m_password.reserve(max_password_size);
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for (size_t i = 0; i < max_password_size; ++i)
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{
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char ch = static_cast<char>(std::cin.get());
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if (std::cin.eof() || ch == '\n' || ch == '\r')
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{
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break;
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}
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else if (std::cin.fail())
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{
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return false;
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}
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else
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{
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m_password.push_back(ch);
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}
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}
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return true;
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}
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#if defined(_WIN32)
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namespace
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{
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bool is_cin_tty()
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{
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return 0 != _isatty(_fileno(stdin));
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}
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}
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bool password_container::read_from_tty()
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{
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const char BACKSPACE = 8;
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HANDLE h_cin = ::GetStdHandle(STD_INPUT_HANDLE);
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DWORD mode_old;
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::GetConsoleMode(h_cin, &mode_old);
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DWORD mode_new = mode_old & ~(ENABLE_ECHO_INPUT | ENABLE_LINE_INPUT);
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::SetConsoleMode(h_cin, mode_new);
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bool r = true;
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m_password.reserve(max_password_size);
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while (m_password.size() < max_password_size)
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{
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DWORD read;
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char ch;
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r = (TRUE == ::ReadConsoleA(h_cin, &ch, 1, &read, NULL));
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r &= (1 == read);
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if (!r)
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{
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break;
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}
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else if (ch == '\n' || ch == '\r')
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{
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std::cout << std::endl;
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break;
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}
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else if (ch == BACKSPACE)
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{
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if (!m_password.empty())
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{
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m_password.back() = '\0';
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m_password.resize(m_password.size() - 1);
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std::cout << "\b \b";
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}
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}
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else
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{
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m_password.push_back(ch);
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std::cout << '*';
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}
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}
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::SetConsoleMode(h_cin, mode_old);
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return r;
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}
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#else
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namespace
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{
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bool is_cin_tty()
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{
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return 0 != isatty(fileno(stdin));
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}
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int getch()
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{
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struct termios tty_old;
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tcgetattr(STDIN_FILENO, &tty_old);
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struct termios tty_new;
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tty_new = tty_old;
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tty_new.c_lflag &= ~(ICANON | ECHO);
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tcsetattr(STDIN_FILENO, TCSANOW, &tty_new);
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int ch = getchar();
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tcsetattr(STDIN_FILENO, TCSANOW, &tty_old);
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return ch;
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}
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}
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bool password_container::read_from_tty()
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{
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const char BACKSPACE = 127;
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m_password.reserve(max_password_size);
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while (m_password.size() < max_password_size)
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{
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int ch = getch();
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if (EOF == ch)
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{
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return false;
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}
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else if (ch == '\n' || ch == '\r')
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{
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std::cout << std::endl;
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break;
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}
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else if (ch == BACKSPACE)
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{
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if (!m_password.empty())
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{
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m_password.back() = '\0';
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m_password.resize(m_password.size() - 1);
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std::cout << "\b \b";
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}
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}
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else
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{
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m_password.push_back(ch);
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std::cout << '*';
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}
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}
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return true;
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}
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#endif
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}
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