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#include "myutils.h"
#include "exceptions.h"
#include "logger.h"
#include "platform.h"
#include <algorithm>
#include <cctype>
#include <cerrno>
#include <string.h>
#include <system_error>
#include <time.h>
#include <vector>
namespace securefs
{
static void find_ids_helper(const std::string& current_dir,
std::unordered_set<id_type, id_hash>& result)
{
id_type id;
std::string hex(id_type::size() * 2, 0);
OSService::recursive_traverse_callback callback
= [&id, &result, &hex](StringRef dir, StringRef name) -> bool {
if (name == "." || name == "..")
return true;
if (name.ends_with(".meta"))
{
std::string total_name = dir + "/" + name.substr(0, name.size() - strlen(".meta"));
hex.assign(hex.size(), 0);
ptrdiff_t i = hex.size() - 1, j = total_name.size() - 1;
while (i >= 0 && j >= 0)
{
char namechar = total_name[j];
if ((namechar >= '0' && namechar <= '9') || (namechar >= 'a' && namechar <= 'f'))
{
hex[i] = namechar;
--i;
}
else if (namechar != '/' && namechar != '\\')
{
throw_runtime_error(
strprintf("File \"%s\" has extension .meta, but not a valid securefs "
"meta filename. Please cleanup the underlying storage first.",
total_name.c_str()));
}
--j;
}
parse_hex(hex, id.data(), id.size());
result.insert(id);
}
return true;
};
OSService::get_default().recursive_traverse(current_dir, callback);
}
std::unordered_set<id_type, id_hash> find_all_ids(const std::string& basedir)
{
std::unordered_set<id_type, id_hash> result;
find_ids_helper(basedir, result);
return result;
}
std::string get_user_input_until_enter()
{
std::string result;
while (true)
{
int ch = getchar();
if (ch == EOF)
{
return result;
}
if (ch == '\r' || ch == '\n')
{
while (!result.empty() && isspace(static_cast<unsigned char>(result.back())))
result.pop_back();
result.push_back('\n');
return result;
}
else if (!result.empty() || !isspace(ch))
{
result.push_back(static_cast<unsigned char>(ch));
}
}
return result;
}
void respond_to_user_action(
const std::unordered_map<std::string, std::function<void(void)>>& actionMap)
{
while (true)
{
std::string cmd = get_user_input_until_enter();
if (cmd.empty() || cmd.back() != '\n')
{
// EOF
return;
}
auto it = actionMap.find(cmd);
if (it == actionMap.end())
{
puts("Invalid command");
continue;
}
it->second();
break;
}
}
size_t popcount(const byte* data, size_t size) noexcept
{
static const size_t TABLE[256]
= {0, 1, 1, 2, 1, 2, 2, 3, 1, 2, 2, 3, 2, 3, 3, 4, 1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3,
4, 4, 5, 1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5, 2, 3, 3, 4, 3, 4, 4, 5, 3, 4,
4, 5, 4, 5, 5, 6, 1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5, 2, 3, 3, 4, 3, 4, 4,
5, 3, 4, 4, 5, 4, 5, 5, 6, 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, 3, 4, 4, 5,
4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7, 1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5, 2,
3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5,
5, 6, 3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7, 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4,
5, 4, 5, 5, 6, 3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7, 3, 4, 4, 5, 4, 5, 5, 6,
4, 5, 5, 6, 5, 6, 6, 7, 4, 5, 5, 6, 5, 6, 6, 7, 5, 6, 6, 7, 6, 7, 7, 8};
size_t res = 0;
for (size_t i = 0; i < size; ++i)
res += TABLE[data[i]];
return res;
}
void warn_if_key_not_random(const byte* key, size_t size, const char* file, int line) noexcept
{
size_t pp = popcount(key, size);
if (pp <= size || pp >= 7 * size)
{
WARN_LOG("Encounter a key with %g%% bits all ones, therefore not \"random enough\". "
"Please report as a bug (%s:%d).",
double(pp) / double(8 * size) * 100.0,
file,
line);
}
}
} // namespace securefs
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