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/*
* AuthBackendFile.cpp
*
* Copyright (C) 2009 Matthias Schiffer <matthias@gamezock.de>
*
* This program is free software: you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by the
* Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License along
* with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "AuthProviderFile.h"
#include <Core/ConfigEntry.h>
#include <Common/Hash.h>
#include <cstdio>
#include <fstream>
#include <boost/regex.hpp>
#include <boost/thread/locks.hpp>
namespace Mad {
namespace Modules {
namespace AuthProviderFile {
void AuthProviderFile::readFile(const std::string &name) {
std::ifstream stream(name.c_str());
if(!stream.good()) {
application->logf(Core::Logger::LOG_WARNING, "AuthProviderFile: Can't read file '%s'.", name.c_str());
return;
}
while(stream.good() && !stream.eof()) {
std::string line;
std::getline(stream, line);
if(line.empty())
continue;
static const boost::regex regex("([^:]+):(.+)", boost::regex_constants::perl);
boost::smatch match;
if(!boost::regex_match(line, match, regex)) {
application->logf(Core::Logger::LOG_WARNING, "AuthProviderFile: Malformed line in file '%s'.", name.c_str());
continue;
}
Core::String password = match[2].str().c_str();
if(filehash.isEmpty()) {
std::string utf8pass = password.extractUTF8();
boost::lock_guard<boost::mutex> lock(mutex);
userMap.insert(std::make_pair(match[1].str().c_str(), std::vector<boost::uint8_t>(utf8pass.begin(), utf8pass.end())));
}
else {
std::vector<boost::uint8_t> data;
data.reserve(password.length()/2);
for(boost::int32_t c = 0; c < password.length()-1; c += 2) {
char buffer[3] = {password[c], password[c+1], 0};
unsigned char byte;
if(std::sscanf(buffer, "%hhx", &byte) != 1) {
application->logf(Core::Logger::LOG_WARNING, "AuthProviderFile: Malformed hash in file '%s'.", name.c_str());
data.clear();
break;
}
data.push_back(byte);
}
if(!data.empty()) {
boost::lock_guard<boost::mutex> lock(mutex);
userMap.insert(std::make_pair(match[1].str().c_str(), data));
}
}
}
}
bool AuthProviderFile::handleConfigEntry(const Core::ConfigEntry &entry, bool /*handled*/) {
if(!entry[0].getKey().matches("AuthProviderFile"))
return false;
if(entry[1].isEmpty())
return true;
if(entry[1].getKey().matches("Hash")) {
if(entry[2].isEmpty()) {
filehash = entry[1][0];
if(!Common::Hash::isHashSupported(filehash))
application->logf(Core::Logger::LOG_WARNING, "AuthProviderFile: Unsupported hash '%s'", filehash.extract().c_str());
}
}
else if(entry[1].getKey().matches("File")) {
if(entry[2].isEmpty()) {
files.push_back(entry[1][0]);
}
}
else if(!entry[2].isEmpty())
return false;
return true;
}
void AuthProviderFile::configFinished() {
if(filehash.isEmpty() || filehash.matches("clear")) {
hashes = Common::Hash::getHashList();
filehash.remove();
}
else {
hashes.clear();
hashes.push_back(filehash);
}
hashes.push_back("Clear");
for(std::vector<Core::String>::iterator file = files.begin(); file != files.end(); ++file)
readFile(file->extract());
}
bool AuthProviderFile::checkPassword(const Core::String &user, const std::vector<boost::uint8_t> &data, const Core::String &hash) throw(Core::Exception) {
if((hash.isEmpty() || hash.matches("clear")) && !filehash.isEmpty()) {
std::vector<boost::uint8_t> password = getPassword(user, filehash);
std::vector<boost::uint8_t> hashdata = Common::Hash::hash(data, filehash);
return (!password.empty() && hashdata.size() == password.size() && std::equal(hashdata.begin(), hashdata.end(), password.begin()));
}
else {
std::vector<boost::uint8_t> password = getPassword(user, hash);
return (!password.empty() && data.size() == password.size() && std::equal(data.begin(), data.end(), password.begin()));
}
}
std::vector<boost::uint8_t> AuthProviderFile::getPassword(const Core::String &user, const Core::String &hash) throw(Core::Exception) {
boost::lock_guard<boost::mutex> lock(mutex);
std::map<Core::String, std::vector<boost::uint8_t> >::iterator userIt = userMap.find(user);
if(userIt == userMap.end())
return std::vector<boost::uint8_t>();
if(filehash.isEmpty()) {
if(hash.matches("clear"))
return userIt->second;
else
return Common::Hash::hash(userIt->second, hash);
}
else if(filehash.matches(hash)) {
return userIt->second;
}
else
throw Core::Exception(Core::Exception::NOT_AVAILABLE);
}
}
}
}
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