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@WGH- WGH-/slot_benis.cpp Secret
Created Dec 13, 2017

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#include <iostream>
#include <cstdlib>
#include <vector>
auto type(uint32_t res)
{
if (res >= 0xFD70)
res = 3;
else if (res >= 0xF0A3)
res = 2;
else if (res >= 0xBAE0)
res = 1;
else
res = 0;
return res;
}
int main(int argc, char **argv)
{
// fill in the values you see here:
//
// 0 - empty
// 1 - bar
// 2 - lemon
// 3 - "7"
//
// order is top-bottom, left-to-right (column-major)
std::vector<uint8_t> info = {1,0,0,1,0,0,0,1,0, 0,1,0,0,1,0,0,0,0, 0,1,2,0,0,0,0,0,1, 0,0,0,0,0,0,1,0,0, 0,0,0,0,0,0,0,1,0};
std::vector<uint32_t> good_shit;
// find PRNG states that give triple "7"
for (size_t i = 0; i < 0x100000000; ++i)
{
if ((i & 0xFFFFFF) == 0)
{
std::cout << '\r' << std::hex << i;
std::cout.flush();
}
uint32_t state = i;
state = state * 0x41C64E6D + 31337;
state = state * 0x41C64E6D + 31337;
auto a1 = type((state >> 16) ^ (state & 0xFFFF));
state = state * 0x41C64E6D + 31337;
state = state * 0x41C64E6D + 31337;
state = state * 0x41C64E6D + 31337;
auto b1 = type((state >> 16) ^ (state & 0xFFFF));
state = state * 0x41C64E6D + 31337;
state = state * 0x41C64E6D + 31337;
state = state * 0x41C64E6D + 31337;
auto c1 = type((state >> 16) ^ (state & 0xFFFF));
if (a1 == 3 && b1 == 3 && c1 == 3)
good_shit.emplace_back(i);
}
std::cout << " total " << std::dec << good_shit.size() << " good shits found" << std::endl;
// brute-force current state
for (size_t i = 0; i < 0x100000000; ++i)
{
if ((i & 0xFFFFFF) == 0)
{
std::cout << '\r' << std::hex << i;
std::cout.flush();
}
bool ok = true;
int total_ok = 0;
uint32_t state = i;
for (auto x : info)
{
state = state * 0x41C64E6D + 31337;
auto res = (state >> 16) ^ (state & 0xFFFF);
res = type(res);
ok &= (res == x);
if (!ok)
break;
}
if (ok)
{
// entering secret combination for the developer menu
// will play game 2 times (because it has button "1" twice in the sequence)
// take that into account:
for (int j = 0; j < 18; ++j)
state = state * 0x41C64E6D + 31337;
uint32_t benis = -1;
for (auto x : good_shit)
{
if (x >= state)
{
benis = x;
break;
}
}
if (benis == -1)
benis = good_shit[0];
std::cout << "\r[!] " << i << ' ' << std::dec << benis - state;
std::cout << std::endl;
std::cout.flush();
}
}
std::cout << std::endl;
return 0;
}
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