campo-sirio/include/dongle.cpp

#include <xvt.h>

#include <applicat.h>
#include <config.h>
#include <dongle.h>
#include <isamrpc.h>
#include <scanner.h>
#include <utility.h>
#include <xvtility.h>
#include <urldefid.h>

///////////////////////////////////////////////////////////
// Dongle stuff
///////////////////////////////////////////////////////////

//#define USERADR    26952
//#define AGAADR     26953
//#define REFKEY (unsigned char*)"CAMPOKEY"
//#define VERKEY (unsigned char*)"<22>pو<70>c<EFBFBD><"

///////////////////////////////////////////////////////////
// Current dongle
///////////////////////////////////////////////////////////

static TDongle* _dongle = NULL;

TDongle& dongle() 
{ 
  if (_dongle == NULL)
    _dongle = new TDongle;
  return *_dongle; 
}

bool destroy_dongle()
{
  bool ok = _dongle != NULL;
  if (ok)
  {
    delete _dongle;
    _dongle = NULL;  
  }
  return ok;
}

///////////////////////////////////////////////////////////
// Bit helper functions
///////////////////////////////////////////////////////////

inline bool test_bit(word w, int b)
{                            
  bool on = (w & (1 << b)) != 0;
  return on;
}

inline void set_bit(word& w, int b, bool on = true)
{                        
  if (on)  
    w |= 1 << b;
  else  
    w &= ~(1 << b);
}

inline void reset_bit(word& w, byte b)
{                        
  w &= ~(1 << b);
}

///////////////////////////////////////////////////////////
// TDongle
///////////////////////////////////////////////////////////

TDongle::TDongle() 
       : _hardware(_dongle_unknown), _type(_no_dongle), _serno(0xFFFF), 
         _max_users(1), _year_assist(2015), _dirty(false), _OEM(-1)
{
  memset(_eprom, 0, sizeof(_eprom));
}  

TDongle::~TDongle() 
{ 
  if (_serno != 0xFFFF)
    logout(); 
}

const TString& TDongle::administrator(TString* pwd) const
{
  if (_admin.blank())
    oem();
  if (pwd)
    *pwd = _admpwd;
  return _admin;
}


// Data punta ad un array di 4 words 
// Deve essere cosi' per problemi del C,
// non trasformare in array: pena di morte! 
void TDongle::garble(word* data) const
{   
  xvt_dongle_sa_crypt(data); // Reversible XOR encryption
}

bool TDongle::already_programmed() const
{     
  return true;  
}
           
void TDongle::set_developer_permissions()
{
  if (_serno == 0 && is_power_station())
  {
    _module.set(255); // Last module on key
    _module.set();    // Activate all modules
  }
  else
  {
    _module.reset(-1);
    _module.set(0, true);
  }

  _shown.reset();

  _max_users = 1;
  _last_update = TDate(TODAY);
  _year_assist = 3000;
}

bool TDongle::ssa_login(const char* mod)
{ 
  if (mod && *mod)
    return xvt_dongle_sa_login(mod) == 0;

  _max_users = 1;
  _last_update = TDate(TODAY);
  _year_assist = _last_update.year();

  _module.reset();          // Disattiva tutti i moduli ...
  _module.set(long(BAAUT)); // ... tranne la base

  const int err = xvt_dongle_sa_login(NULL);
  _serno = (err >= 0) ? err : 0xFFFF;
	if (_serno == 0xFFFF && is_power_station())
		_serno = 0;
  if (_serno != 0xFFFF)
  {
    _hardware =_dongle_ssa;
    _type = _serno ? _user_dongle : _developer_dongle;
    if (_serno)
    {
      Tdninst dn;
      if (dn.find_serno())
        _year_assist = dn.assist_year();
      else
        _year_assist = 2091; // Vecchia versione
      for (word m = BAAUT+1; m < ENDAUT; m++)
      {
        const TString& name = module_code2name(m);
        if (xvt_dongle_sa_test(name) == 0)
          _module.set(long(m));
      }
    }
    else
      set_developer_permissions();
  }
  // else log_message("ssa_login() failed with code %d", err);
  return _serno != 0xFFFF; 
}

bool TDongle::network_login(bool test_all_keys)
{
  const char* appname = main_app().name();

  if (network() && ok())
    rpc_UserLogout(appname);
      
  TString server = "127.0.0.1";
  if (!(xvt_sys_dongle_server_running() & 0x1))
    server = ini_get_string(CONFIG_INSTALL, "Server", "Dongle");

//  const char* guest  = "******";
//  const TString16 appname = main_app().name();
//  const char* utente = (!main_app().is_running() && appname == "ba0100") ? guest : (const char *) user();
  const char* utente = user();

  bool ok = rpc_UserLogin(server, utente, "******", appname);
  if (ok)
  {    
    _hardware = _dongle_network;
    _type = _user_dongle;
    _max_users = 1;
    _last_update = TDate(TODAY);

    // Let's try to spare some network band!
    ok = rpc_DongleInfo(_serno, _year_assist, _module);
    if (!ok)
    {
      _serno = rpc_DongleNumber();
      _year_assist = rpc_DongleYear();
      ok = rpc_DongleModules(_module);
      if (ok && main_app().name() == "ba0100")
        warning_box(TR("ATTENZIONE! Il server di protezione non <20> aggiornato:\n"
                    "Controllare la corretta installazione del servizio"));
    }
  }
  else
    log_message("rpc_UserLogin(%s, %s) failed", (const char*)server, (const char*)utente);
  return ok;
}

bool TDongle::login(bool test_all_keys)
{                                                                   
  bool ok = true;

  if (_type != _no_dongle) // Already logged in
    logout();

  TDongleHardware hw = _hardware;
  const int srv = xvt_sys_dongle_server_running();
  if (srv != 0)
  {
    if (srv & 2)
      hw = _dongle_ssanet;
    else
      hw = _dongle_network;
  }
  else
  {
    const TString& port = ini_get_string(CONFIG_SSA, "", "SSA-PORT");
    if (port.full())
      hw = _dongle_ssanet;
    else
    {
      const TString& dongle = ini_get_string(CONFIG_INSTALL, "Server", "Dongle");
      hw = dongle.full() ? _dongle_network : _dongle_ssa;
    }
  }
  if (hw == _dongle_network)
    ok = network_login(test_all_keys); 
  else
    ok = ssa_login(NULL);

	if (ok)
  {
    _hardware = hw;
    ini_set_int(CONFIG_INSTALL, "Main", "Donglehw", (int)_hardware);
  }
  else
  { // DEMO
    _hardware = _dongle_unknown;
    _type = _no_dongle;
    _serno = 0xFFFF;  //numero di serie pi<70> alto possibile (65535 in esadecimale: non sar<61> mai raggiunto da chiavi clienti...magari!)
    _max_users = 1;
    _last_update = TDate(TODAY);
    _year_assist = 3000;  // anno di assistenza a 3000 per non avere problemi con le versioni nei vari anni
    _module.set(ENDAUT);  // Last module on key
    _module.set();        // Activate all modules
    _shown.reset();
  }

  if (!ok && local())
  {
    TString_array ssa;
    const int n = list_files("*.ssa", ssa);
    switch (n)
    {
    case 0: error_box(FR("Non esistono file SSA validi")); break;
    case 1: error_box(FR("File SSA non valido:\n%s"), 
                  (const char*)ssa.row(0));
            break;
    default:
            error_box(FR("Sono presenti troppi file SSA:\n%s,%s,..."), 
                      (const char*)ssa.row(0), (const char*)ssa.row(1));
            break;
    }
  }

  return ok;
}

bool TDongle::login(const char* module)
{
  const word code = module_name2code(module);
  bool ok = active(code);
  if (ok && _hardware == _dongle_ssa)
    ok = ssa_login(module);
  return ok;
}

bool TDongle::logout()
{ 
  switch (_hardware)
  {
  case _dongle_network:
    rpc_UserLogout(main_app().name());
    break;
  case _dongle_ssanet:   
  case _dongle_ssa:   
    xvt_dongle_sa_logout(NULL); 
    break;
  default:
    break;  
  }

  _type = _no_dongle;
  _serno = 0xFFFF;

  return true;
}

int TDongle::oem() const
{
  if (_OEM < 0)
  {
    TString& firm = (TString&) _reseller;
    TString& campo = (TString&) _product;
    TString& breve = (TString&) _shortname;
    TString& admin = (TString&)_admin;   
    TString& admpwd = (TString&)_admpwd; 
    int& oem = (int&)_OEM;

    //nuovo metodo di rilevamento producer (dalla 10.0 in avanti); il producer sta nel file oem.ini sotto la cartella
    //setup, sia nel CD che soprattutto nel programma installato
    TConfig ini(CONFIG_OEM, "MAIN");
    oem = ini.get_int("OEM", NULL, -1, -1);
    if (oem >= 0)
    {
      TString8 para; para << "OEM_" << oem;
      ini.set_paragraph(para);
      campo = decode(ini.get("Product"));
      firm = decode(ini.get("Reseller"));
      breve = decode(ini.get("Name"));
      admin = decode(ini.get("Administrator"));
      admpwd = decode(ini.get("Password"));
    }
    
    if (firm.blank())    //vecchio metodo di rilevamento del producer: sta in install.ini
    {   
      firm = decode(ini_get_string(CONFIG_GENERAL, "Main", "Producer"));
      campo = breve = " ";
    }
    //nuovo metodo: cerca produttore (Name) e prodotto (Product)
    if (firm.blank())
    {
      ignore_xvt_errors(true);
      char* p = firm.get_buffer(80);
      xvt_res_get_str(STR_FIRMNAME, p, firm.size());
      ignore_xvt_errors(false);
    }

    if (admin.blank())
    {
      admin = decode(ini_get_string(CONFIG_GENERAL, "Main", "Administrator"));
      if (admin.blank())
      {
        admin = "ADMIN";
        admpwd = "ad.min";
      }
    }

    if (admpwd.blank())
		{
      admpwd = decode(ini_get_string(CONFIG_GENERAL, "Main", "Password"));
      if (admpwd.blank())
      {
        admpwd = admin;
			  admpwd.lower();
			  admpwd.insert(".", 2);
      }
		}

    if (campo.blank())
      campo = "Campo Enterprise";
    if (firm.blank())
      firm = "Sirio Informatica e Sistemi s.p.a.";
    if (breve.blank())
      breve = "Campo";

    if (oem < 0) oem = 1;
  }
  return _OEM;
}

// Ritorna il nome della ditta che vende il programma attuale
const TString& TDongle::reseller() const
{
  if (_reseller.empty())
    oem();
  return _reseller;
}

const TString& TDongle::product() const
{
  if (_product.empty())
    oem();
  return _product;
}

const TString& TDongle::short_name() const
{
  if (_shortname.empty())
    oem();
  return _shortname;
}

const TString& TDongle::server_name() const
{
  TString& tmp = get_tmp_string(50);
  if (network() && !xvt_sys_dongle_server_running())
  {
    if (hardware() == _dongle_ssanet)
      tmp = ini_get_string(CONFIG_SSA, NULL, "Port");
    else
      tmp = ini_get_string(CONFIG_INSTALL, "Server", "Dongle");
  }

  if (tmp.blank())
    xvt_sys_get_host_name(tmp.get_buffer(), tmp.size());
  return tmp;
}


bool TDongle::active(word module) const 
{ 
  const bool yes = (module < ENDAUT) && _module[module] && shown(module); 
  return yes;
}

bool TDongle::activate(word module, bool on) 
{ 
  bool ok = module < ENDAUT;
  if (ok)
  {
    _module.set(module, on && shown(module)); 
    _dirty = true; 
  }
  return ok;
}


const TString_array& TDongle::info() const
{
  if (_info.empty())
  {
    TScanner scanner("campo.aut");
    for (int aut = 0; ; aut++)
    {
      const TString& row = scanner.line();
      if (row.blank())
        break;
		
      TToken_string* tok = new TToken_string;
      tok->strncpy(row, 3);
      const TString& name = row.mid(3);
			if (name.full())
				*tok << dictionary_translate(name);
      ((TString_array&)_info).add(tok);
    }
  }
  return _info;
}

word TDongle::module_name2code(const char* mod) const
{
  int i = BAAUT;
  if (mod && *mod && !xvt_str_same(mod, "sy"))
  {
    if (real::is_natural(mod))
		{
			i = atoi(mod);
			// Trasforma il numero 77 nel codice M77AUT
			if (i == 77)  
				i = M77AUT;
		}
		else
		{
			const TString_array& modinfo = info();
			for (i = modinfo.last(); i >= 0; i--)
			{
        const TString& autstr = modinfo.row(i);
				if (autstr.starts_with(mod, true))
					break;
			}
		}
  }
  return word(i);
}

const TString& TDongle::module_code2name(word mod) const
{
  const TString_array& modinfo = info();
  if (mod < modinfo.items())
    return modinfo.row(mod).left(2);
  return EMPTY_STRING;
}

const TString& TDongle::module_code2desc(word mod) const
{
  const TString_array& modinfo = info();
  return mod < modinfo.items() ? modinfo.row(mod).mid(3) : EMPTY_STRING; 
}

const TString& TDongle::module_name2desc(const char* mod) const
{
  const word cod = module_name2code(mod);
  if (cod == 0)
  {
    if (xvt_str_same(mod, "sy"))
      return get_tmp_string() = TR("Sistema");
  }
  return module_code2desc(cod);
}

bool TDongle::shown(word code) const
{
  bool yes = code < ENDAUT;
  if (yes)
  {
    yes = _shown[code];
    if (!yes) // Puo' voler dire "nascosto" ma anche "non ho mai controllato"
    {
      const TString4 mod = module_code2name(code);
      yes = mod.not_empty();
      if (yes && code > BAAUT && code < ENDAUT)
      {
        TAuto_token_string ee = ini_get_string(CONFIG_GENERAL, mod, "OEM"); // Modern OEM handling
        if (ee.full())
          yes = ee.get_pos(oem()) >= 0;
      }
      if (yes)
        ((TBit_array&)_shown).set(code); // Setto il flag di visibilta' per la prossima volta
    }
  }
  return yes;
}

bool TDongle::demo() const 
{ return hardware() == _dongle_unknown && type() == _no_dongle; }

///////////////////////////////////////////////////////////////////////////////
// TEnigma_machine
///////////////////////////////////////////////////////////////////////////////

#define DNINST_PATH "setup/dninst.zip"

class TEnigma_machine : public TObject
{
  TScanner* _scan;
  int _year_assist;

protected:
  void init_key(char key[8]) const;
  bool decode_string(const TString& datain, TString& dataout) const;
  bool encode_string(const TString& linein, TString& lineout) const;

  bool init();
  void uninit();

public:
  virtual bool ok() const { return _scan != NULL && !_scan->eof(); }

  bool line(TString& data);
  bool find_serno(long serno);
  int year_assist() const { return _year_assist; }

  bool encode(const TString& txtfile); // dninst.txt -> dninst.zip

  TEnigma_machine();
  ~TEnigma_machine();
};

void TEnigma_machine::init_key(char key[8]) const
{
  for (int i = 0; i < 8; i++)  
    key[i] = 'A' + ::rand() % 26;
}

bool TEnigma_machine::decode_string(const TString& datain, TString& dataout) const
{ 
  dataout.cut(0);
  if (datain.not_empty())
  {
  	char* tmp = dataout.get_buffer(datain.len());
    char key[8]; init_key(key);
    int i;
    for (i = 0; datain[i]; i++)
      tmp[i] = datain[i] - (i < 8 ? key[i] : tmp[i - 8]);
    tmp[i] = '\0';
  }
  return dataout.full();
}

bool TEnigma_machine::encode_string(const TString& linein, TString& lineout) const
{
  lineout.cut(0);
  if (linein.full() && !linein.starts_with("//"))
  {
    char key[8]; init_key(key);
    char* buf = lineout.get_buffer(linein.len());
    size_t i = 0;
    for (i = 0; linein[i]; i++)
      buf[i] = linein[i] + (i < 8 ? key[i] : linein[i - 8]);
    buf[i] = '\0';
  }
  return lineout.full();
}


bool TEnigma_machine::line(TString& data)
{ return _scan != NULL ? decode_string(_scan->line(), data) : false; }

bool TEnigma_machine::find_serno(long serno)
{
  if (serno == 0)
    return true;

  TToken_string row(80, ';');
  if (_year_assist > 2100)
  {
    TString8 para; para << '[' << serno << ']';
    while (line(row))
    {
      if (row == para)
        return true;
    }
  }
  else
  {
    while (line(row))
    {
      if (row.get_long(0) == serno)
        return true;
    }
  }
  return false;
}

bool TEnigma_machine::encode(const TString& txtfile)
{
  uninit();

  ofstream o(DNINST_PATH);

  TString lineout;

  TScanner s(txtfile);
  const TString& year = s.line();
  ::srand(883);
  encode_string(year, lineout);
  o << lineout << endl;
  ::srand(atoi(year));
  while (s.good())
  {
    const TString& linein = s.line();
    if (linein.empty())
      break;
    encode_string(linein, lineout);
    o << lineout << endl;
  }

  init();

  return o.good();
}

void TEnigma_machine::uninit()
{
  _year_assist = 0;
  if (_scan != NULL)
  {
    delete _scan;
    _scan = NULL;
  }
}

bool TEnigma_machine::init()
{
  uninit();
  if (fexist(DNINST_PATH))
  {
    _scan = new TScanner(DNINST_PATH);
    ::srand(883);

    const TString& first_line = _scan->line();
    if (first_line.len() == 4)
    {
      TString4 l1; decode_string(first_line, l1);
      _year_assist = atoi(l1);
      ::srand(_year_assist);
    }
  }
  return _scan != NULL;
}

TEnigma_machine::TEnigma_machine() 
               : _scan(NULL), _year_assist(0)
{ init(); }

TEnigma_machine::~TEnigma_machine()
{ uninit(); }

int Tdninst::assistance_year2solar(int ay) const
{ return (ay/1000)*1000 + (ay%1000)/10; }

int Tdninst::parse_date(const TString& line, TString& key, TDate& datascad) const
{
  const int equal = line.find('=');
  if (equal > 0 && equal <= 16)
  {
    key = line.left(equal); key.trim();
    TString16 strdate = line.mid(equal+1, 16); strdate.trim();
    if (strdate.empty())
    {
      datascad = TODAY; // Mettiamo una data valida comunque
      return key.full() ? 1 : 0;
    }
    
    int d, m, y;
    if (sscanf(strdate, "%2d-%2d-%4d", &d, &m, &y) == 3)
    {
      datascad = TDate(d, m, y);
      return datascad.ok() ? 2 : 0;
    }
  }
  return 0;
}

bool Tdninst::compare_cmdline(const TString& cmdline, const TString& pattern) const
{
  if (cmdline == pattern)
    return true;
  
  bool is_pattern = false;
  if (pattern.len() > 2)
  {
    for (int i = 2; pattern[i]; i++)
    {
      if (pattern[i]=='*' || pattern[i] == '?')
        is_pattern = true;
    }
  }
  if (is_pattern)
    return cmdline.match(pattern, true);

  return false;
}

int Tdninst::test_cmdline(const TString& cmdline, bool key_must_exist, TString& msg) const
{
  msg.cut(0);
  
  const TDongle& don = dongle();
  const long serno = don.number();
  if (serno == 0)
  { 
    if (is_power_station())
      return 0; // Solo chiavi per uso interno Sirio
    msg = TR("Chiave di sviluppo non autorizzata");
    return 1; 
  } 

  const TString4 strmod = cmdline.left(2);
  if (!key_must_exist) // Le personalizzazioni non hanno un modulo vero e proprio 
  {
    const int space_pos = cmdline.find(' ');
    if (space_pos < 0 || space_pos == 3)
    { 
      const word codmod = don.module_name2code(strmod);
      if (codmod == BAAUT)
        return 0;
    }
  }

  TEnigma_machine em;
  const int dninst_ass = em.year_assist();
  const TDate oggi(TODAY);

  bool bFound = false;
  if (dninst_ass > 2100)
  {
    if (em.find_serno(serno))
    {
      TString80 dninst_line;
      TString16 key;
      TDate datascad;
      while (em.line(dninst_line))
      {
        if (dninst_line.empty() || dninst_line.starts_with("["))
          break; // Fine file o paragrafo

        if (parse_date(dninst_line, key, datascad))
        {
          const bool scaduto = datascad < oggi;
          if (key == "*")
          {
            if (scaduto)
            {
              msg.format(FR("Chiave %ld scaduta il %s"), serno, datascad.string());
              return 7;
            }
          } else
          if (compare_cmdline(cmdline, key))
          {
            bFound = true;
            if (scaduto)
            {
              msg << TR("Applicazione scaduta il ") << datascad;
              return 8;
            }
          } else
          if (key == strmod)
          {
            if (scaduto)
            {
              msg << TR("Modulo scaduto il ") << datascad;
              return 9;
            }
          }
        }
      }
    }
  }
  else
  {
    TToken_string dninst_line(80, ';');
    while (em.line(dninst_line))
    {
      bFound = dninst_line.get_long(0) == serno;
      if (bFound)
      {
        if (dninst_line.get_pos(strmod) > 0)
        {
          msg << TR("Modulo non attivo in dninst.zip : ") << strmod;
          return 5;
        }
        break;
      }
    }
  }

  if (!bFound && key_must_exist)
  {
    msg << TR("Impossibile trovare ") << cmdline << TR(" tra i programmi abilitati");
    return 6;
  } 

  return 0;
}

bool Tdninst::can_I_run(const bool is_personal_program, const bool verbose) const
{
  const TApplication& app = main_app();
  TFilename cmdline = app.argv(0);
  cmdline = cmdline.name_only();
  if (cmdline.starts_with("ba", true) || cmdline.ends_with("cnv", true))
    return true;

  const char* option = app.argc() > 1 ? app.argv(1) : "";
  if (*option == '-' && isdigit(*(option+1)))
    cmdline << ' ' << option;
  cmdline.lower();
  
  TString msg;
  bool ok = test_cmdline(cmdline, is_personal_program, msg) == 0;
  if (!ok && verbose)
    error_box(msg);
  return ok;
}

bool Tdninst::find_serno() const
{
  const word serno = dongle().number();
  if (serno == 0)
    return true;

  const TDate oggi(TODAY);
  bool good = false;
  TEnigma_machine em;
  if (em.ok())
  {
    if (em.year_assist() > 2100)
    {
      good = em.find_serno(serno);
    }
    else
    {
      TToken_string l(80, ';');
      while (em.line(l))
      {
        if (l.get_long(0) == serno)
        {
          good = true;
          break;
        }
      }
    }
  }
  return good;
}

bool Tdninst::find_killed(TToken_string& kill_list) const
{
  kill_list.cut(0);    

  const int serno = dongle().number();
  if (serno == 0)
    return true;

  bool good = false;
  TEnigma_machine em;
  if (em.ok())
  {
    if (em.year_assist() > 2100)
    {
      TToken_string l(80, '=');
      good = em.find_serno(serno);
      if (good)
      {
        const TDate oggi(TODAY);
        TString16 str;
        TDate ds;
        while (em.line(l))
        {
          if (l.empty() || l[0] == '[')
            break;
          if (parse_date(l, str, ds) && ds < oggi)
            kill_list.add(str);
        }
      }
    }
    else
    {
      TToken_string l(80, ';');
      while (em.line(l))
      {
        if (l.get_long(0) == serno)
        {
          const int semicolon = l.find(l.separator());
          if (semicolon > 0)
          {
            kill_list = l.mid(semicolon+1);
            kill_list.lower();
            kill_list.replace(l.separator(), kill_list.separator());
          }
          good = true;
          break;
        }
      }
    }
  }
  return good;
}

bool Tdninst::find_expiring(int days, TString& module, TDate& expires) const
{
  const TDate oggi(TODAY);

  expires = oggi; expires += days;
  module.cut(0);

  const word serno = dongle().number();
  if (serno == 0)
    return false;

  TEnigma_machine em;
  if (em.ok() && em.year_assist() > 2100 && em.find_serno(serno))
  {
    TToken_string l(80, '=');
    TString16 str;
    TDate ds;
    while (em.line(l))
    {
      if (l.empty() || l[0] == '[')
        break;
      if (parse_date(l, str, ds) && ds >= oggi && ds <= expires)
      {
        module = str;
        expires = ds;
      }
    }
  }

  return module.full();
}

int Tdninst::check_customer() const
{
  int error = 2; // Not found

  const word serno = dongle().number();
  if (serno == 0)
    error = is_power_station() ? 0 : 2;
  else
  {
    TEnigma_machine em;
    if (em.ok() && em.year_assist() > 2150 && em.find_serno(serno))
    {
      const TDate oggi(TODAY);
      error = 0;
      TToken_string l(80, '=');
      while (em.line(l) && error == 0)
      {
        if (l.empty() || l[0] == '[')
          break;
        if (l[0]=='*' || l.starts_with("MustCall"))
        {
          TString16 str;
          TDate ds;
          if (parse_date(l, str, ds) && oggi >= ds)
            error = (l[0] == '*') ? 2 : 1;
        }
      }
    }
  }

  return error;
}

bool Tdninst::decode(const TString& f) const
{
  ofstream o(f);

  TEnigma_machine em;
  o << em.year_assist() << endl;

  size_t nlines = 0;
  TString256 l;
  while (em.line(l))
  {
    o << l << endl;
    nlines++;
  }

  return nlines > 0;
}

bool Tdninst::encode(const TString& f) const
{
  TEnigma_machine em;
  return em.encode(f);
}

Tdninst::Tdninst() : _year_assist(0)
{
  TEnigma_machine s; 
  _year_assist = s.year_assist();    // 2101, 2121, 2151
}