ntpwdhash_main.c

Linux上的802.1x 的supplicant的实现。很多supplicant程序都是基于它开发的

#include <openssl/ssl.h>
#include <string.h>
#include <strings.h>
#include <stdint.h>

char *to_unicode(char *non_uni)
{
  char *retUni;
  int i;

  if (!non_uni)
    {
      printf("Invalid value passed in to to_unicode()! (%s:%d)\n", 
	     __FUNCTION__, __LINE__);
      return NULL;
    }

  retUni = (char *)malloc((strlen(non_uni)+1)*2);
  if (retUni == NULL)
    {
      printf("Error with MALLOC in to_unicode()! (%s:%d)\n", __FUNCTION__,
	     __LINE__);
      return NULL;
    }
  bzero(retUni, ((strlen(non_uni)+1)*2));

  for (i=0; i<strlen(non_uni); i++)
    {
      retUni[(2*i)] = non_uni[i];
    }
  return retUni;
}

void NtPasswordHash(char *Password, char *PasswordHash)
{
  EVP_MD_CTX cntx;
  char retVal[20];
  int i, len;
  char *uniPassword;

  if ((!Password) || (!PasswordHash))
    {
      printf("Invalid data passed in to NtPasswordHash()! (%s:%d)\n",
	     __FUNCTION__, __LINE__);
      return;
    }

  bzero(retVal, 20);
  uniPassword = to_unicode(Password);
  len = (strlen(Password))*2;

  EVP_DigestInit(&cntx, EVP_md4());
  EVP_DigestUpdate(&cntx, uniPassword, len);
  EVP_DigestFinal(&cntx, (uint8_t *)&retVal, (u_int *)&i);
  memcpy(PasswordHash, &retVal, 16);
  free(uniPassword);
}

int main(int argc, char *argv[])
{
  char pwd_hash[16];
  int i;

  if (argc <= 1)
    {
      printf("ntpwdhash <password>\n");
      return 255;
    }

  NtPasswordHash(argv[1], (char *)&pwd_hash);

  printf("Resulting hash value (copy and paste to Xsupplicant configuration)"
	 " :\n");

  for (i=0;i<16;i++)
    {
      printf("%02X", (unsigned char)pwd_hash[i]);
    }
  printf("\n");

  return 0;
}