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user.cpp
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user.cpp
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#include "user.h"
std::map<QString, QString> user::m_halgorithm_types = {
{"1", "MD5"},
{"2a", "Blowfish"},
//{"2y", "Eksblowfish"},
{"5", "SHA-256"},
{"6", "SHA-512"}
};
user::user(const QString& username, const QString& algid, const QString& salt, const QString& hashofpass, QObject *parent) : QObject(parent)
{
Q_UNUSED(parent);
setUser(username, algid, salt, hashofpass);
}
user::user(const QJsonObject& json, QObject *parent) : QObject(Q_NULLPTR)
{
Q_UNUSED(parent);
if (json.contains("User") && json["User"].isString())
m_username = json["User"].toString();
else
throw ParsingException{"\"User\" field not found in saved data"};
if (json.contains("AlgId") && json["AlgId"].isString())
m_algid = json["AlgId"].toString();
else
throw ParsingException{"\"AlgId\" field not found in saved data"};
if (json.contains("Salt") && json["Salt"].isString())
m_salt = json["Salt"].toString();
else
throw ParsingException{"\"Salt\" field not found in saved data"};
if (json.contains("Hash") && json["Hash"].isString())
m_hashofpass = json["Hash"].toString();
else
throw ParsingException{"\"Hash\" field not found in saved data"};
}
user::user(const user& other) : QObject(Q_NULLPTR)
{
setUser(other.getName(), other.getAlgid(), other.getSalt(), other.getHash());
}
user user::operator= (const user& other)
{
user target;
target.setUser(other.getName(), other.getAlgid(), other.getSalt(), other.getHash());
return target;
}
void user::setUser(const QString& username, const QString& algid, const QString& salt, const QString& hashofpass)
{
this->m_username = username;
this->m_algid = algid;
this->m_salt = salt;
this->m_hashofpass = hashofpass;
}
void user::write_to_json(QJsonObject& json) const
{
json["User"] = m_username;
json["AlgId"] = m_algid;
json["Salt"] = m_salt;
json["Hash"] = m_hashofpass;
}
void user::collision_attack()
{
// init
collisionAttackTask_CPU::setNewTarget(this);
// username + dictionary attack
QThreadPool::globalInstance()->start(new collisionAttackTask_CPU(collisionAttackTask_CPU::Heuristic::full));
// restricted attack
limited_attack(1);
// unrestricted eternal attack
unlimited_attack(1);
// wait until interruption
QThreadPool::globalInstance()->waitForDone();
emit signal_attackFinished();
return;
}
void user::resumed_collision_attack()
{
// init
collisionAttackTask_CPU::setNewTarget(this);
/////////////////////////////////
// determine cache threshold (upper bound), start each cached ("below threshold") task with its respective gained savepoint
/////////////////////////////////
// maximum reached milestone
collisionAttackTask_CPU::Heuristic upperbound_heur = collisionAttackTask_CPU::Heuristic::full;
uint upperbound_password_length = 1;
while (true)
{
if (collisionAttackTask_CPU::attackStatus() != 1)
break;
QPair<QString, collisionAttackTask_CPU::Heuristic> task_init = collisionAttackTask_CPU::getCacheInit();
if (task_init.first == QString(""))
break;
switch(task_init.second)
{
case collisionAttackTask_CPU::Heuristic::none:
upperbound_heur = collisionAttackTask_CPU::Heuristic::none;
if (upperbound_password_length < (uint)task_init.first.length())
upperbound_password_length = (uint)task_init.first.length();
break;
case collisionAttackTask_CPU::Heuristic::partial:
if (upperbound_heur != collisionAttackTask_CPU::Heuristic::none)
{
upperbound_heur = collisionAttackTask_CPU::Heuristic::partial;
if (upperbound_password_length < (uint)task_init.first.length())
upperbound_password_length = (uint)task_init.first.length();
}
break;
case collisionAttackTask_CPU::Heuristic::full:
break;
default:
continue;
break;
}
QThreadPool::globalInstance()->start(new collisionAttackTask_CPU(task_init.second, task_init.first.length(), task_init.first));
}
// some cached attack found => go beyond
if (upperbound_password_length != 1)
upperbound_password_length++;
/////////////////////////////////
// start "above threshold" tasks
/////////////////////////////////
// restricted attack
if ((upperbound_heur == collisionAttackTask_CPU::Heuristic::full || upperbound_heur == collisionAttackTask_CPU::Heuristic::partial))
{
limited_attack(upperbound_password_length);
upperbound_password_length = 1;
}
// unrestricted eternal attack
unlimited_attack(upperbound_password_length);
// wait until interruption
QThreadPool::globalInstance()->waitForDone();
emit signal_attackFinished();
return;
}
void user::limited_attack(const uint& initial_password_length)
{
if (initial_password_length <= collisionAttackTask_CPU::getOptimalMaxPL())
{
for (unsigned char pass_length = initial_password_length; pass_length <= collisionAttackTask_CPU::getOptimalMaxPL(); pass_length++)
{
if (collisionAttackTask_CPU::attackStatus() != 1)
break;
QThreadPool::globalInstance()->start(new collisionAttackTask_CPU(collisionAttackTask_CPU::Heuristic::partial, pass_length));
}
}
}
void user::unlimited_attack(const uint& initial_password_length)
{
uint current_password_length = initial_password_length;
while (true)
{
if (collisionAttackTask_CPU::attackStatus() != 1)
break;
else if (QThreadPool::globalInstance()->activeThreadCount() < QThreadPool::globalInstance()->maxThreadCount()) // based on CPUs quant
{
QThreadPool::globalInstance()->start(new collisionAttackTask_CPU(collisionAttackTask_CPU::Heuristic::none, current_password_length));
current_password_length++;
}
else
QThread::sleep(2);
}
}
QString user::getAlgorithmName(const QString& algid)
{
if (! m_halgorithm_types.count(algid))
return QString("");
return m_halgorithm_types.at(algid);
}
void user::attack_interrupt()
{
collisionAttackTask_CPU::stopAttack();
}
void user::attack_save()
{
collisionAttackTask_CPU::saveAttack();
}