SessionIdGenerator.cpp
PHP Code:
/**
Generates a session id.
[MENTION=1332190]author[/MENTION] Metho
[MENTION=1805674]Version[/MENTION] 1.0 10/02/17
*/
// Session->SessionId
unsigned int Session::SessionId = 0;
// Session->GetSessionId()
unsigned int Session::GetSessionId()
{
return this->SessionId;
}
// Session->IncreaseSessionId()
void Session::IncreaseSessionId() {
this->SessionId++;
}
// Session->GetProcessId()
uint32 Session::GetProcessId()
{
return FPlatformProcess::GetCurrentProcessId();
}
// Session->UpdateTime()
void Session::UpdateTime()
{
this->Time = FDateTime::UtcNow();
this->Seconds = Time.ToUnixTimestamp();
this->Milliseconds = Time.ToUnixTimestamp() * 1000 + Time.GetMillisecond();
this->UpdateLinearCongruential();
}
// Session->GetSeconds()
unsigned long long Session::GetSeconds()
{
return this->Seconds;
}
// Session->GetMilliseconds()
unsigned long long Session::GetMilliseconds()
{
return this->Milliseconds;
}
// Session->UpdateLinearCongruential()
void Session::UpdateLinearCongruential()
{
#define MODMULT(a, b, c, m, s) x = s / a; s = b * (s - a * x) - c * x; if (s < 0) s += m
#define A1 53668
#define A2 52774
#define B1 40014
#define B2 40692
#define C1 12211
#define C2 3791
#define M1 2147483563L
#define M2 2147483399L
#define SH 2147483562
#define FA 4.656613e-10
auto x = this->GetSeconds() ^ (this->GetMilliseconds() << 11);
auto y = this->GetProcessId() ^ (this->GetMilliseconds() << 11);
MODMULT(A1, B1, C1, M1, x);
MODMULT(A2, B2, C2, M2, y);
auto z = x - y;
if (z < 1)
{
z += SH;
}
this->LinearCongruential = z;
#undef MODMULT
#undef A1
#undef A2
#undef B1
#undef B2
#undef C1
#undef C2
#undef M1
#undef M2
#undef SH
#undef FA
}
// Session->GetLinearCongruential()
long long Session::GetLinearCongruential()
{
return this->LinearCongruential;
}
// Session->GenerateId()
FString Session::GenerateId()
{
this->IncreaseSessionId();
this->UpdateTime();
FMD5 MD5;
// Phase 1 --[[
uint8 SystemSeed[2048];
FString SystemString = FString::Printf(TEXT("%.15s%ld%ld%0.8F"),
this->GetSessionId(),
this->GetSeconds(),
this->GetMilliseconds(),
this->GetLinearCongruential()
);
FString::ToBlob(SystemString, SystemSeed, sizeof(SystemSeed));
MD5.Update(SystemSeed, sizeof(SystemSeed));
// ]]-- Phase 1
// Phase 2 --[[
#define RandomSeedLength 2048
uint8 RandomSeed[RandomSeedLength];
#define RandomSeedSize sizeof(RandomSeed)
FString RandomString = FString::FromInt(FMath::RandRange(10 ^ (RandomSeedLength - 1), 10 ^ RandomSeedLength - 1));
FString::ToBlob(RandomString, RandomSeed, RandomSeedSize);
MD5.Update(RandomSeed, RandomSeedSize);
#undef RandomSeedLength
#undef RandomSeedSize
// ]]-- Phase 2
// Phase 3 --[[
#define DigestLength 32
uint8 Digest[DigestLength];
MD5.Final(Digest);
FString HashString;
for (unsigned short i = 0; i < DigestLength; i++)
{
HashString += FString::Printf(TEXT("%02x"), Digest[i]);
}
#undef DigestLength
// ]]-- Phase 3
// UE_LOG(LogTemp, Log, TEXT("Session was generated. Session id: %d, Session string: %s"), this->GetSessionId(), HashString);
return HashString;
}
PHP Code:
/**
Generates a session id.
[MENTION=1332190]author[/MENTION] Metho
[MENTION=1805674]Version[/MENTION] 1.0 10/02/17
*/
// Session
class Session {
public:
// *->GenerateId()
FString GenerateId();
// *->GetSessionId()
unsigned int GetSessionId();
// *->GetProcessId()
uint32 GetProcessId();
// *->GetSeconds()
unsigned long long GetSeconds();
// *->GetMilliseconds()
unsigned long long GetMilliseconds();
// *->GetLinearCongruential()
long long GetLinearCongruential();
private:
// *->SessionId
static unsigned int SessionId;
// *->IncreaseSessionId
void IncreaseSessionId();
// *->Time
FDateTime Time;
// *->UpdateTime()
void UpdateTime();
// *->Seconds
unsigned long long Seconds;
// *->Milliseconds
unsigned long long Milliseconds;
// *->UpdateLinearCongruential()
void UpdateLinearCongruential();
// *->LinearCongruential
long long LinearCongruential;
};
