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/*
* Copyright 2012, 2014 Andrew Ayer
*
* This file is part of git-crypt.
*
* git-crypt is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* git-crypt is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with git-crypt. If not, see <http://www.gnu.org/licenses/>.
*
* Additional permission under GNU GPL version 3 section 7:
*
* If you modify the Program, or any covered work, by linking or
* combining it with the OpenSSL project's OpenSSL library (or a
* modified version of that library), containing parts covered by the
* terms of the OpenSSL or SSLeay licenses, the licensors of the Program
* grant you additional permission to convey the resulting work.
* Corresponding Source for a non-source form of such a combination
* shall include the source code for the parts of OpenSSL used as well
* as that of the covered work.
*/
#include "git-crypt.hpp"
#include "util.hpp"
#include "coprocess.hpp"
#include <string>
#include <iostream>
int exec_command (const std::vector<std::string>& args)
{
Coprocess proc;
proc.spawn(args);
return proc.wait();
}
int exec_command (const std::vector<std::string>& args, std::ostream& output)
{
Coprocess proc;
std::istream* proc_stdout = proc.stdout_pipe();
proc.spawn(args);
output << proc_stdout->rdbuf();
return proc.wait();
}
int exec_command_with_input (const std::vector<std::string>& args, const char* p, size_t len)
{
Coprocess proc;
std::ostream* proc_stdin = proc.stdin_pipe();
proc.spawn(args);
proc_stdin->write(p, len);
proc.close_stdin();
return proc.wait();
}
std::string escape_shell_arg (const std::string& str)
{
std::string new_str;
new_str.push_back('"');
for (std::string::const_iterator it(str.begin()); it != str.end(); ++it) {
if (*it == '"' || *it == '\\' || *it == '$' || *it == '`') {
new_str.push_back('\\');
}
new_str.push_back(*it);
}
new_str.push_back('"');
return new_str;
}
uint32_t load_be32 (const unsigned char* p)
{
return (static_cast<uint32_t>(p[3]) << 0) |
(static_cast<uint32_t>(p[2]) << 8) |
(static_cast<uint32_t>(p[1]) << 16) |
(static_cast<uint32_t>(p[0]) << 24);
}
void store_be32 (unsigned char* p, uint32_t i)
{
p[3] = i; i >>= 8;
p[2] = i; i >>= 8;
p[1] = i; i >>= 8;
p[0] = i;
}
bool read_be32 (std::istream& in, uint32_t& i)
{
unsigned char buffer[4];
in.read(reinterpret_cast<char*>(buffer), 4);
if (in.gcount() != 4) {
return false;
}
i = load_be32(buffer);
return true;
}
void write_be32 (std::ostream& out, uint32_t i)
{
unsigned char buffer[4];
store_be32(buffer, i);
out.write(reinterpret_cast<const char*>(buffer), 4);
}
void* explicit_memset (void* s, int c, std::size_t n)
{
volatile unsigned char* p = reinterpret_cast<unsigned char*>(s);
while (n--) {
*p++ = c;
}
return s;
}
static bool leakless_equals_char (const unsigned char* a, const unsigned char* b, std::size_t len)
{
volatile int diff = 0;
while (len > 0) {
diff |= *a++ ^ *b++;
--len;
}
return diff == 0;
}
bool leakless_equals (const void* a, const void* b, std::size_t len)
{
return leakless_equals_char(reinterpret_cast<const unsigned char*>(a), reinterpret_cast<const unsigned char*>(b), len);
}
static void init_std_streams_platform (); // platform-specific initialization
void init_std_streams ()
{
// The following two lines are essential for achieving good performance:
std::ios_base::sync_with_stdio(false);
std::cin.tie(0);
std::cin.exceptions(std::ios_base::badbit);
std::cout.exceptions(std::ios_base::badbit);
init_std_streams_platform();
}
#ifdef _WIN32
#include "util-win32.cpp"
#else
#include "util-unix.cpp"
#endif
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