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| #include <iostream>
#include <stdio.h>
#include <Windows.h>
void decrypt(DWORD* v, DWORD* k) {
DWORD v0 = v[0], v1 = v[1], sum = 0xC6EF3720, i;
DWORD delta = 0x9E3779B9;
DWORD k0 = k[0], k1 = k[1], k2 = k[2], k3 = k[3];
for (i = 0; i < 32; i++) {
v1 -= ((v0 >> 5) + k3) ^ (v0 + sum) ^ ((v0 << 4) + k2);
v0 -= ((v1 >> 5) + k1) ^ (v1 + sum) ^ ((v1 << 4) + k0);
sum -= delta;
}
v[0] = v0; v[1] = v1;
}
int main()
{
unsigned char enflag[32] = {
0x99, 0xA1, 0x85, 0x55, 0x68, 0x5D, 0x82, 0x7E, 0x39, 0x00,
0x4D, 0x94, 0x43, 0x69, 0x72, 0x71, 0x06, 0x43, 0x51, 0x6A,
0x00, 0xAD, 0x14, 0x4B, 0x3F, 0x0D, 0xD2, 0x64, 0x15, 0xDB,
0x37, 0x9F
};
DWORD key[4] = { 0x6B696C69,0x79645F65,0x696D616E,0x67626463 };
for (int i = 0; i < 4; i++)
decrypt((DWORD*)&enflag[i*8], key);
for (int i = 0; i < 32; i++)
printf("%c", enflag[i]);
return 0;
}
|
