[HaBo]

#define VC_EXTRALEAN
#define _WIN32_WINNT 0x0500
#include <windows.h>
#include <stdio.h>

const unsigned char desiredhash[20]=
{ 0x5D,0xBC,0x71,0x6C,0x46,0x00,0x09,0x7B,0x85,0xB9,0xE5,0x1D,0x6A,0xEB,0x77,0xA4,0x36,0x3B,0x03,0xED };

char pass[8] = "aaaa\0";
char hash[20];

int next_comb()
{
	int d=3;

	while(d >= 0){
		pass[d]++;
		if(pass[d] > 'z'){
			pass[d] = 'a';
			d--;
		}
		else return(1);
	}
	return(0);
}

int main()
{
	HCRYPTPROV hProv;
	HCRYPTHASH hHash;
	int len;

	CryptAcquireContext(&hProv, NULL, NULL, PROV_RSA_FULL, 0);
	do{
		CryptCreateHash(hProv, CALG_SHA, 0, 0, &hHash);
		CryptHashData(hHash, pass, 4, 0);
		CryptGetHashParam(hHash, HP_HASHVAL, hash, &len, 0);
		CryptDestroyHash(hHash);
		if(!memcmp(hash, desiredhash, 20)) break;
	}while(next_comb());
	CryptReleaseContext(hProv, 0);
	puts(pass);
}