//获取证书主题信息
 subject = X509_get_subject_name(cert);

 //获得证书主题信息条目个数
 entriesNum = sk_X509_NAME_ENTRY_num(subject->entries);
 //X509_NAME_print_ex(biosubject, subject, 0, ASN1_STRFLGS_ESC_MSB);
 //BIO_read(biosubject,msginfo,msginfoLen);
 //循环读取个条目信息
 for(i=0;i<entriesNum;i++)
 {
  //获取第I个条目值
  name_entry = sk_X509_NAME_ENTRY_value(subject->entries,i);
  Nid = OBJ_obj2nid(name_entry->object);
  out=NULL;
  if((len = ASN1_STRING_to_UTF8(&out,name_entry->value))<0)
   continue;

  nUtf8 = 2*len;
  pUtf8 = (unsigned short *)malloc(nUtf8);
  memset(pUtf8,0,nUtf8);
  
  rv = MultiByteToWideChar(
   CP_UTF8,
   0,
   (char*)out,
   len,
   pUtf8,
   nUtf8);
  rv = WideCharToMultiByte(
   CP_ACP,
   0,
   pUtf8,
   rv,
   (char*)msginfo,
   nUtf8,
   NULL,
   NULL);
  free(pUtf8);
  OPENSSL_free(out);
  pUtf8 = NULL;
  msginfoLen = rv;
  msginfo[msginfoLen]='\0';
  switch(Nid)
  {
  case NID_countryName://国家
   printf("subject 's countryName:%s\n",msginfo);
   break;
  case NID_stateOrProvinceName://省
   printf("subject 's ProvinceName:%s\n",msginfo);
   break;
   
  case NID_localityName://地区
   printf("subject 's localityName:%s\n",msginfo);
   break;
  case NID_organizationName://组织
   printf("subject 's organizationName:%s\n",msginfo);
   break;
  case NID_organizationalUnitName://单位
   printf("subject 's organizationalUnitName:%s\n",msginfo);
   break;
  case NID_commonName://通用名
   printf("subject 's commonName:%s\n",msginfo);
   break;
  case NID_pkcs9_emailAddress://Mail
   printf("subject 's emailAddress:%s\n",msginfo);
   break;
  }//end switch
 }