minetest/src/auth.cpp

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/*
Minetest-c55
Copyright (C) 2011 celeron55, Perttu Ahola <celeron55@gmail.com>
This program 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 2 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 General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "auth.h"
#include <fstream>
#include <jmutexautolock.h>
//#include "main.h" // for g_settings
#include <sstream>
#include "strfnd.h"
#include "debug.h"
// Convert a privileges value into a human-readable string,
// with each component separated by a comma.
std::string privsToString(u64 privs)
{
std::ostringstream os(std::ios_base::binary);
if(privs & PRIV_BUILD)
os<<"build,";
if(privs & PRIV_TELEPORT)
os<<"teleport,";
if(privs & PRIV_SETTIME)
os<<"settime,";
if(privs & PRIV_PRIVS)
os<<"privs,";
if(privs & PRIV_SHOUT)
os<<"shout,";
if(os.tellp())
{
// Drop the trailing comma. (Why on earth can't
// you truncate a C++ stream anyway???)
std::string tmp = os.str();
return tmp.substr(0, tmp.length() -1);
}
return os.str();
}
// Converts a comma-seperated list of privilege values into a
// privileges value. The reverse of privsToString(). Returns
// PRIV_INVALID if there is anything wrong with the input.
u64 stringToPrivs(std::string str)
{
u64 privs=0;
Strfnd f(str);
while(f.atend() == false)
{
std::string s = trim(f.next(","));
if(s == "build")
privs |= PRIV_BUILD;
else if(s == "teleport")
privs |= PRIV_TELEPORT;
else if(s == "settime")
privs |= PRIV_SETTIME;
else if(s == "privs")
privs |= PRIV_PRIVS;
else if(s == "shout")
privs |= PRIV_SHOUT;
else
return PRIV_INVALID;
}
return privs;
}
AuthManager::AuthManager(const std::string &authfilepath):
m_authfilepath(authfilepath),
m_modified(false)
{
m_mutex.Init();
try{
load();
}
catch(SerializationError &e)
{
dstream<<"WARNING: AuthManager: creating "
<<m_authfilepath<<std::endl;
}
}
AuthManager::~AuthManager()
{
save();
}
void AuthManager::load()
{
JMutexAutoLock lock(m_mutex);
dstream<<"AuthManager: loading from "<<m_authfilepath<<std::endl;
std::ifstream is(m_authfilepath.c_str(), std::ios::binary);
if(is.good() == false)
{
dstream<<"AuthManager: failed loading from "<<m_authfilepath<<std::endl;
throw SerializationError("AuthManager::load(): Couldn't open file");
}
for(;;)
{
if(is.eof() || is.good() == false)
break;
// Read a line
std::string line;
std::getline(is, line, '\n');
std::istringstream iss(line);
// Read name
std::string name;
std::getline(iss, name, ':');
// Read password
std::string pwd;
std::getline(iss, pwd, ':');
// Read privileges
std::string stringprivs;
std::getline(iss, stringprivs, ':');
u64 privs = stringToPrivs(stringprivs);
// Store it
AuthData ad;
ad.pwd = pwd;
ad.privs = privs;
m_authdata[name] = ad;
}
m_modified = false;
}
void AuthManager::save()
{
JMutexAutoLock lock(m_mutex);
dstream<<"AuthManager: saving to "<<m_authfilepath<<std::endl;
std::ofstream os(m_authfilepath.c_str(), std::ios::binary);
if(os.good() == false)
{
dstream<<"AuthManager: failed saving to "<<m_authfilepath<<std::endl;
throw SerializationError("AuthManager::save(): Couldn't open file");
}
for(core::map<std::string, AuthData>::Iterator
i = m_authdata.getIterator();
i.atEnd()==false; i++)
{
std::string name = i.getNode()->getKey();
if(name == "")
continue;
AuthData ad = i.getNode()->getValue();
os<<name<<":"<<ad.pwd<<":"<<privsToString(ad.privs)<<"\n";
}
m_modified = false;
}
bool AuthManager::exists(const std::string &username)
{
JMutexAutoLock lock(m_mutex);
core::map<std::string, AuthData>::Node *n;
n = m_authdata.find(username);
if(n == NULL)
return false;
return true;
}
void AuthManager::set(const std::string &username, AuthData ad)
{
JMutexAutoLock lock(m_mutex);
m_authdata[username] = ad;
m_modified = true;
}
void AuthManager::add(const std::string &username)
{
JMutexAutoLock lock(m_mutex);
m_authdata[username] = AuthData();
m_modified = true;
}
std::string AuthManager::getPassword(const std::string &username)
{
JMutexAutoLock lock(m_mutex);
core::map<std::string, AuthData>::Node *n;
n = m_authdata.find(username);
if(n == NULL)
throw AuthNotFoundException("");
return n->getValue().pwd;
}
void AuthManager::setPassword(const std::string &username,
const std::string &password)
{
JMutexAutoLock lock(m_mutex);
core::map<std::string, AuthData>::Node *n;
n = m_authdata.find(username);
if(n == NULL)
throw AuthNotFoundException("");
AuthData ad = n->getValue();
ad.pwd = password;
n->setValue(ad);
m_modified = true;
}
u64 AuthManager::getPrivs(const std::string &username)
{
JMutexAutoLock lock(m_mutex);
core::map<std::string, AuthData>::Node *n;
n = m_authdata.find(username);
if(n == NULL)
throw AuthNotFoundException("");
return n->getValue().privs;
}
void AuthManager::setPrivs(const std::string &username, u64 privs)
{
JMutexAutoLock lock(m_mutex);
core::map<std::string, AuthData>::Node *n;
n = m_authdata.find(username);
if(n == NULL)
throw AuthNotFoundException("");
AuthData ad = n->getValue();
ad.privs = privs;
n->setValue(ad);
m_modified = true;
}
bool AuthManager::isModified()
{
JMutexAutoLock lock(m_mutex);
return m_modified;
}