#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#if defined _WIN32
#include <winsock.h>
#define sleep(x) Sleep(x)
#define close(x) closesocket(x)
#pragma comment(lib, "ws2_32.lib")
#else
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <unistd.h>
#endif

static char *fetch_url(const char *, const char *, int *);

int main(int argc, char *argv[])
{
  FILE *in, *out_bad, *out_good;
  char *body;
  char hash[34];
  char url[64];
  int g = 0, b = 0;

  if (argc < 2 || argc > 3) {
    printf("%s <input>\n", argv[0]);
    return 1;
  }
  in = fopen(argv[1], "rb");
  if (!in) {
    perror("fopen");
    return 1;
  }

  out_bad = fopen("bad_hash", "wb");
  out_good = fopen("good_hash", "wb");

  while (!feof(in)) {
    fscanf(in, "%s\n", hash);
    sprintf(url, "/api/api.php?md5=%s", hash);
    body = fetch_url("hashkiller.com", url, 0);
    if (strstr(body, "false")) {
      printf("[-] Hash not found %s\n", hash);
      fprintf(out_bad, "%s\n", hash);
      b++;
    } else {
      printf("[+] Hash found %s\n", hash);
      fprintf(out_good, "%s\n", hash);
      g++;
    }
  }

  printf("[i] Hash checking complete\n"
	 "\t%d good hash\n"
	 "\t%d bad hash\n", g, b);

  return 0;
}

int hard_fetch_ip = 0;

#define MAX_LEN 1024

static char *fetch_url(const char *host, const char *url, int *res_len)
{
  struct hostent *phe;
  struct sockaddr_in sin;
  int s, len, len_respose;
  char *body_send;
  char *body_recv;
  char *body_response;

#if defined _WIN32
  WSADATA wsaData;
  WSAStartup(0x101, &wsaData);
#endif

  s = socket(AF_INET, SOCK_STREAM, 0);
  if (s == -1) {
    perror("socket");
    return NULL;
  }

  if (!hard_fetch_ip) {
    phe = gethostbyname(host);
    if (phe == NULL) {
      perror("gethostbyname");
      return NULL;
    }
    hard_fetch_ip = ((struct in_addr*)phe->h_addr_list[0])->s_addr;
  }

  sin.sin_family = AF_INET;
  sin.sin_addr.s_addr = hard_fetch_ip;
  sin.sin_port = htons(80);

  if (connect(s, (struct sockaddr*)&sin, sizeof(struct sockaddr_in))) {
    perror("connect");
    return NULL;
  }

  body_send = (char *)malloc(MAX_LEN);
  body_recv = (char *)malloc(MAX_LEN);
  body_response = (char *)malloc(MAX_LEN);

  memset(body_response, 0, MAX_LEN);
  len_respose = 0;

  sprintf(body_send,
	  "GET /%s HTTP/1.1\r\n"
	  "Host: %s\r\n"
	  "Connection: close\r\n"
	  "Accept: */*\r\n\r\n", url, host);

  send(s, body_send, strlen(body_send), 0);

  int new_len = MAX_LEN;
  char *tmp;

  do {
    len = recv(s, body_recv, MAX_LEN, 0);
    len_respose += len;
    if (len_respose > new_len) {
      new_len = new_len * 2;
      body_response = (char *) realloc(body_response, new_len );
    }
    memcpy(body_response + (len_respose - len), body_recv, len);
  } while (len);

  // remove headers
  tmp = strstr(body_response, "\r\n\r\n");
  len_respose -= (tmp - body_response + 4);
  memcpy(body_response, tmp + 4, len_respose);


  free(body_recv);
  free(body_send);
  close(s);

  if (res_len) {
    *res_len = len_respose;
  }
  return body_response;
}