#include <stdio.h>
#include <windows.h>

unsigned char state[11] = {0};
unsigned char state2[11] = {0};

unsigned char enc[11] = {0x56, 0x4B, 0x53, 0x2E, 0x38, 0x31, 0x3C, 0x34, 0x47, 0x51, 0};
//unsigned char dec[11] = {0x57, 0x43, 0x52, 0x2D, 0x31, 0x31, 0x36, 0x36, 0x44, 0x53, 0x00};
unsigned char dec[11] = {'W','C','R','-','1','1','6','6','D','S', 0};

unsigned char chk[11] = {0};

unsigned char dec2[11] = {0};

void dumpState()
{
  printf("0x%02X 0x%02X 0x%02X 0x%02X 0x%02X 0x%02X 0x%02X 0x%02X 0x%02X 0x%02X 0x%02X\n", state2[0], state2[1], state2[2], state2[3], state2[4], state2[5], state2[6], state2[7], state2[8], state2[9], state2[10]);
}

void bcrypt_process()
{
  unsigned long len=11;
	unsigned long state_len = 11;
	unsigned char i, j;
	unsigned long k;

  i = 0;
  j=0;

	for (k = 0; k < len; k++) {
		unsigned char t;

		i = (i + 1) % state_len;
		j = (j + state[i]) % state_len;
		t = state[j];
		state[j] = state[i];
		state[i] = t;

		dec2[k] = enc[k] ^ state[(state[i] + state[j]) % state_len];
  }
}

bool check()
{
  memcpy(state, state2, 11);
  bcrypt_process();
  if(memcmp(dec2, dec, 11)==0)
  {
    dumpState();
    return true;
  }
  return false;
}
void allState(int i = 0)
{
  if(i==11)
  {
    //dumpState();
    if(check())
      {
        //exit(1);
    }
  }
  for(int k=0;k<11;k++)
  {
    if(i==0)
    {
      printf("k = %d\n", k);
    }
    if(chk[k]>0)continue;
    state2[i]=k;
    chk[k]++;
    allState(i+1);
    chk[k]--;
  }
}

int main(int argc, char* argv[])
{
  //dumpState();
  allState();
  printf("%X\n", enc[1]);
	return 0;
}