/[winpt]/trunk/Src/wptPassphraseCB.cpp
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Diff of /trunk/Src/wptPassphraseCB.cpp

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revision 304 by twoaday, Wed Mar 21 10:59:31 2007 UTC revision 344 by twoaday, Sun Nov 27 14:56:52 2011 UTC
# Line 1  Line 1 
1  /* wptPassphraseCB.cpp - GPGME Passphrase Callback  /* wptPassphraseCB.cpp - GPGME Passphrase Callback
2   *      Copyright (C) 2001, 2002-2006 Timo Schulz   *      Copyright (C) 2001, 2002-2006, 2009, 2011 Timo Schulz
3   *      Copyright (C) 2005 g10 Code GmbH   *      Copyright (C) 2005 g10 Code GmbH
4   *   *
5   * This file is part of WinPT.   * This file is part of WinPT.
# Line 46  Line 46 
46      ((cmd) == GPG_CMD_DECRYPT? IDC_DECRYPT_HIDE : IDC_DECRYPT_SIGN_HIDE)      ((cmd) == GPG_CMD_DECRYPT? IDC_DECRYPT_HIDE : IDC_DECRYPT_SIGN_HIDE)
47    
48  const char* get_symkey_algo (int algo);  const char* get_symkey_algo (int algo);
 void ListBox_AddString_utf8 (HWND lb, const char *txt);  
49    
50    
51  /* Overwrite passphrase and free memory. */  /* Overwrites the passphrase and free the memory.
52       Pointer is also reset to NULL. */
53  static void  static void
54  burn_passphrase (char **pwd)  burn_passphrase (char **pwd)
55  {  {
# Line 96  passphrase_callback_proc (HWND dlg, UINT Line 96  passphrase_callback_proc (HWND dlg, UINT
96          if (c->gpg_cmd == GPG_CMD_DECRYPT) {          if (c->gpg_cmd == GPG_CMD_DECRYPT) {
97              SetDlgItemText (dlg, IDC_DECRYPT_HIDE, _("&Hide Typing"));              SetDlgItemText (dlg, IDC_DECRYPT_HIDE, _("&Hide Typing"));
98              SetDlgItemText (dlg, IDC_DECRYPT_LISTINF,              SetDlgItemText (dlg, IDC_DECRYPT_LISTINF,
99                              _("Encrypted with the following public key(s)"));                              _("Encrypted with the following public key(s):"));
100              CheckDlgButton (dlg, IDC_DECRYPT_HIDE, BST_CHECKED);              CheckDlgButton (dlg, IDC_DECRYPT_HIDE, BST_CHECKED);
101          }          }
102          else if (c->gpg_cmd == GPG_CMD_SIGN) {          else if (c->gpg_cmd == GPG_CMD_SIGN) {
# Line 104  passphrase_callback_proc (HWND dlg, UINT Line 104  passphrase_callback_proc (HWND dlg, UINT
104              CheckDlgButton (dlg, IDC_DECRYPT_SIGN_HIDE, BST_CHECKED);              CheckDlgButton (dlg, IDC_DECRYPT_SIGN_HIDE, BST_CHECKED);
105          }          }
106          /* Because it depends on the order the keys are stored in the          /* Because it depends on the order the keys are stored in the
107             keyring whether res->recipients is complete or not, we also             keyring, whether res->recipients is complete or not, we also
108             support that the recipients were externally extracted and then             support that the recipients were externally extracted and then
109             we use this list. */             we use this list. */
110          if (c->recipients)          if (c->recipients) /* recipients were already extracted. */
111              recip = c->recipients; /* recipients were already extracted. */              recip = c->recipients;
112          else {          else if (c->gpg) {
113              res = gpgme_op_decrypt_result (c->gpg);              res = gpgme_op_decrypt_result (c->gpg);
114              if (res && res->recipients)              if (res && res->recipients)
115                  recip = res->recipients;                  recip = res->recipients;
# Line 121  passphrase_callback_proc (HWND dlg, UINT Line 121  passphrase_callback_proc (HWND dlg, UINT
121                  memset (&key, 0, sizeof (key));                  memset (&key, 0, sizeof (key));
122                  if (!winpt_get_pubkey (r->keyid, &key)) {                  if (!winpt_get_pubkey (r->keyid, &key)) {
123                      gpgme_user_id_t u = key.ctx->uids;                      gpgme_user_id_t u = key.ctx->uids;
                       
124                      inf = (u->name? u->name : _("Invalid User ID"));                      inf = (u->name? u->name : _("Invalid User ID"));
125                      if (u->email != NULL && strlen (u->email) > 1)                      if (u->email != NULL && strlen (u->email) > 1)
126                          inf = inf + " <" + u->email + ">";                          inf = inf + " <" + u->email + ">";
# Line 142  passphrase_callback_proc (HWND dlg, UINT Line 141  passphrase_callback_proc (HWND dlg, UINT
141              EnableWindow (GetDlgItem (dlg, IDC_DECRYPT_LIST), FALSE);              EnableWindow (GetDlgItem (dlg, IDC_DECRYPT_LIST), FALSE);
142          SetDlgItemText (dlg, c->gpg_cmd == GPG_CMD_DECRYPT?          SetDlgItemText (dlg, c->gpg_cmd == GPG_CMD_DECRYPT?
143                          IDC_DECRYPT_PWDINFO : IDC_DECRYPT_SIGN_PWDINFO,                          IDC_DECRYPT_PWDINFO : IDC_DECRYPT_SIGN_PWDINFO,
144                          c->bad_pwd? _("Bad passphrase; Enter passphrase again") :                          c->bad_pwd? _("Invalid passphrase; Please enter your passphrase again") :
145                          _("Please enter your passphrase"));                          _("Please enter your passphrase"));
146          if (c->gpg_cmd == GPG_CMD_DECRYPT) {          if (c->gpg_cmd == GPG_CMD_DECRYPT) {
147              SetFocus (GetDlgItem (dlg, IDC_DECRYPT_PWD));              SetFocus (GetDlgItem (dlg, IDC_DECRYPT_PWD));
148              if (res && !res->recipients) {              /* no recipients means symmetric encryption */
149                if (res && !res->recipients) {
150                  StringBuffer sinf;                  StringBuffer sinf;
151    
152                  sinf = _("Symmetric encryption.");                  sinf = _("Symmetric encryption.");
153                  sinf = sinf + "\n" + get_symkey_algo (c->sym.sym_algo);                  sinf = sinf + "\n" + get_symkey_algo (c->sym.sym_algo);
154                  sinf = sinf + " " + _("encrypted data.");                  sinf = sinf + " " + _("encrypted data") + ".";
155                  SetDlgItemText (dlg, IDC_DECRYPT_MSG, sinf.getBuffer ());                  SetDlgItemText (dlg, IDC_DECRYPT_MSG, sinf.getBuffer ());
156              }              }
157              else              else
# Line 168  passphrase_callback_proc (HWND dlg, UINT Line 168  passphrase_callback_proc (HWND dlg, UINT
168          case WM_COMMAND:          case WM_COMMAND:
169              switch (HIWORD (wparam)) {              switch (HIWORD (wparam)) {
170              case BN_CLICKED:              case BN_CLICKED:
171                  if  (LOWORD (wparam) == IDC_DECRYPT_HIDE                  if  (LOWORD (wparam) == IDC_DECRYPT_HIDE ||
172                      || LOWORD (wparam) == IDC_DECRYPT_SIGN_HIDE) {                       LOWORD (wparam) == IDC_DECRYPT_SIGN_HIDE) {
173                      HWND hwnd;                      HWND hwnd;
174                      int hide = IsDlgButtonChecked (dlg, item_ctrl_id2 (c->gpg_cmd));                      int hide;
175                        hide = IsDlgButtonChecked (dlg, item_ctrl_id2 (c->gpg_cmd));
176                      hwnd = GetDlgItem (dlg, item_ctrl_id (c->gpg_cmd));                      hwnd = GetDlgItem (dlg, item_ctrl_id (c->gpg_cmd));
177                      SendMessage (hwnd, EM_SETPASSWORDCHAR, hide? '*' : 0, 0);                      SendMessage (hwnd, EM_SETPASSWORDCHAR, hide? '*' : 0, 0);
178                      SetFocus (hwnd);                      SetFocus (hwnd);
# Line 179  passphrase_callback_proc (HWND dlg, UINT Line 180  passphrase_callback_proc (HWND dlg, UINT
180              }              }
181    
182              switch (LOWORD (wparam)) {              switch (LOWORD (wparam)) {
183              case IDOK:                case IDOK:
184                  /* XXX: the item is even cached when the passphrase is not                  /* XXX: the item is even cached when the passphrase is not
185                          correct, which means that the user needs to delete all                          correct, which means that the user needs to delete all
186                          cached entries to continue. */                          cached entries to continue. */
# Line 188  passphrase_callback_proc (HWND dlg, UINT Line 189  passphrase_callback_proc (HWND dlg, UINT
189                  n = item_get_text_length (dlg, item_ctrl_id (c->gpg_cmd));                  n = item_get_text_length (dlg, item_ctrl_id (c->gpg_cmd));
190                  if (!n) {                  if (!n) {
191                      c->pwd = new char[2];                      c->pwd = new char[2];
                     if (!c->pwd)  
                         BUG (NULL);  
192                      strcpy (c->pwd, "");                      strcpy (c->pwd, "");
193                  }                  }
194                  else {                  else {
195                      char *p = new char[n+2];                      char *p = new char[n+2];
                     if (!p)  
                         BUG (NULL);  
                     /* Get the passphrase and convert it utf8.  
                        This does not just the us-ascii charset. */  
196                      SafeGetDlgItemText (dlg, item_ctrl_id (c->gpg_cmd), p, n+1);                      SafeGetDlgItemText (dlg, item_ctrl_id (c->gpg_cmd), p, n+1);
197                      c->pwd = native_to_utf8 (p);                      c->pwd = m_strdup (p);
198                      sfree_if_alloc (p);                      sfree_if_alloc (p);
199                  }                  }
200                  res = gpgme_op_decrypt_result (c->gpg);                  if (c->gpg != NULL) {
201                  if (!res)                      res = gpgme_op_decrypt_result (c->gpg);
202                      res_sig = gpgme_op_sign_result (c->gpg);                      if (!res)
203                  if (!c->is_card && reg_prefs.cache_time > 0 &&                          res_sig = gpgme_op_sign_result (c->gpg);
204                      (res || res_sig)) {                      if (!c->is_card && reg_prefs.cache_time > 0 && (res || res_sig)) {
205                      if (agent_get_cache (c->keyid, &item))                          if (agent_get_cache (c->keyid, &item))
206                          agent_unlock_cache_entry (&item);                              agent_unlock_cache_entry (&item);
207                      else                          else
208                          agent_put_cache (c->keyid, c->pwd, reg_prefs.cache_time);                              agent_put_cache (c->keyid, c->pwd, reg_prefs.cache_time);
209                        }
210                  }                  }
211                  c->cancel = 0;                  c->cancel = 0;
212                  EndDialog (dlg, TRUE);                  EndDialog (dlg, TRUE);
# Line 254  parse_gpg_keyid (const char *pass_info) Line 250  parse_gpg_keyid (const char *pass_info)
250     a input message for the user in @desc. */     a input message for the user in @desc. */
251  static int  static int
252  parse_gpg_description (const char *uid_hint, const char *pass_info,  parse_gpg_description (const char *uid_hint, const char *pass_info,
253                         char *desc, int size)                         char *desc, size_t desc_size)
254  {  {
255      gpgme_pubkey_algo_t algo;      gpgme_pubkey_algo_t algo;
256      char usedkey[16+1];      char usedkey[16 + 1];
257      char mainkey[16+1];      char mainkey[16 + 1];
258      char *p, *uid;      char *p;
     int n=0;  
259    
260      algo = (gpgme_pubkey_algo_t)0;      algo = (gpgme_pubkey_algo_t)0;
261      /* Each uid_hint contains a long key-ID so it is at least 16 bytes. */      /* Each uid_hint contains a long key-ID so it is at least 16 bytes. */
# Line 270  parse_gpg_description (const char *uid_h Line 265  parse_gpg_description (const char *uid_h
265          return -1;          return -1;
266      }      }
267    
268      while (p = strsep ((char**)&pass_info, " ")) {      int n = 0;
269        while ((p = strsep ((char**)&pass_info, " "))) {
270          switch (n++) {          switch (n++) {
271          case 0: strncpy (mainkey, p, 16); mainkey[16] = 0; break;          case 0:
272          case 1: strncpy (usedkey, p, 16); usedkey[16] = 0; break;              strncpy (mainkey, p, 16);
273          case 2: algo = (gpgme_pubkey_algo_t)atol (p); break;              mainkey[16] = 0;
274                break;
275    
276            case 1:
277                strncpy (usedkey, p, 16);
278                usedkey[16] = 0;
279                break;
280    
281            case 2:
282                algo = (gpgme_pubkey_algo_t)atol (p);
283                break;
284          }          }
285      }      }
286      uid_hint += 16; /* skip keyid */      uid_hint += 16; /* skip keyid */
287      uid_hint += 1;  /* space */      uid_hint += 1;  /* space */
288    
289      uid = utf8_to_native (uid_hint);      struct winpt_key_s skey;
290        gpgme_subkey_t sk;
291        if (winpt_get_seckey (mainkey, &skey))
292            BUG (0);
293        for (sk = skey.ctx->subkeys; sk; sk = sk->next) {
294            if (memcmp (sk->keyid, usedkey, 8) == 0)
295                break;
296        }
297        char *uid = utf8_to_native (uid_hint);
298      if (strcmp (usedkey, mainkey))      if (strcmp (usedkey, mainkey))
299          _snprintf (desc, size-1,          _snprintf (desc, desc_size-1,
300                     _("You need a passphrase to unlock the secret key for user:\n"                     _("You need a passphrase to unlock the secret key for user:\n"
301                       "\"%s\"\n"                       "\"%s\"\n"
302                       "%s key, ID 0x%s (main key ID 0x%s)\n"),                       "%d-bit %s key, ID 0x%s, created %s (main key ID 0x%s)\n"),
303                     uid, get_key_pubalgo (algo), usedkey+8, mainkey+8);                     uid, sk->length, get_key_pubalgo (algo),
304                       usedkey+8, get_key_created (sk->timestamp), mainkey+8);
305      else if (!strcmp (usedkey, mainkey))      else if (!strcmp (usedkey, mainkey))
306          _snprintf (desc, size-1,          _snprintf (desc, desc_size-1,
307                     _("You need a passphrase to unlock the secret key for user:\n"                     _("You need a passphrase to unlock the secret key for user:\n"
308                       "\"%s\"\n"                       "\"%s\"\n"
309                       "%s key, ID 0x%s\n"),                       "%d-bit %s key, created %s, ID 0x%s\n"),
310                       uid, get_key_pubalgo (algo), usedkey+8);                       uid, sk->length, get_key_pubalgo (algo),
311                         get_key_created (sk->timestamp), usedkey+8);
312      safe_free (uid);      safe_free (uid);
313      return 0;      return 0;
314  }  }
# Line 327  passphrase_cb (void *hook, const char *u Line 343  passphrase_cb (void *hook, const char *u
343      void *item;      void *item;
344      const char *keyid=NULL, *pass;      const char *keyid=NULL, *pass;
345      DWORD n;      DWORD n;
     int rc = 0;  
346    
347      if (!c) {      if (!c) {
348          log_debug ("passphrase_cb: error no valid callback\r\n");          log_debug ("passphrase_cb: error no valid callback\r\n");
349          return gpg_error (GPG_ERR_INV_ARG);          return gpg_error (GPG_ERR_INV_ARG);
350      }      }
351    
352        /* If the last entered passphrase was wrong, we delete a
353           possible cached entry, we reset the passphrase buffer
354           and switch to the initial state. */
355      c->bad_pwd = prev_was_bad? 1 : 0;      c->bad_pwd = prev_was_bad? 1 : 0;
356      if (prev_was_bad && !c->cancel) {      if (prev_was_bad && !c->cancel) {
357          if (c->pwd)          if (c->pwd)
# Line 345  passphrase_cb (void *hook, const char *u Line 364  passphrase_cb (void *hook, const char *u
364          if (strlen (passphrase_info) < 16 &&          if (strlen (passphrase_info) < 16 &&
365              !strstr (passphrase_info, "OPENPGP")) {              !strstr (passphrase_info, "OPENPGP")) {
366              /* assume symetric encryption. */              /* assume symetric encryption. */
367              int pos=2;              int pos = 2;
368              c->sym.sym_algo = atoi (passphrase_info);              c->sym.sym_algo = atoi (passphrase_info);
369              if (c->sym.sym_algo > 9)              if (c->sym.sym_algo > 9)
370                  pos++;                  pos++;
             /* XXX: be more strict. */  
371              c->sym.s2k_mode = atoi (passphrase_info+pos);              c->sym.s2k_mode = atoi (passphrase_info+pos);
372              c->sym.s2k_hash = atoi (passphrase_info+pos+2);              c->sym.s2k_hash = atoi (passphrase_info+pos+2);
373          }          }
# Line 384  passphrase_cb (void *hook, const char *u Line 402  passphrase_cb (void *hook, const char *u
402          }          }
403          else if (uid_hint)          else if (uid_hint)
404              parse_gpg_description (uid_hint, passphrase_info,              parse_gpg_description (uid_hint, passphrase_info,
405                                     c->info, sizeof (c->info) - 1);                                     c->info, DIM (c->info) - 1);
406            int rc = 0;
407          if (c->gpg_cmd == GPG_CMD_DECRYPT) {          if (c->gpg_cmd == GPG_CMD_DECRYPT) {
408              rc = DialogBoxParam (glob_hinst, (LPCSTR)IDD_WINPT_DECRYPT,              rc = DialogBoxParam (glob_hinst, (LPCSTR)IDD_WINPT_DECRYPT,
409                                   (HWND)c->hwnd, passphrase_callback_proc,                                   (HWND)c->hwnd, passphrase_callback_proc,
# Line 423  passphrase_cb (void *hook, const char *u Line 442  passphrase_cb (void *hook, const char *u
442  void  void
443  set_gpg_passphrase_cb (passphrase_cb_s *cb, gpgme_ctx_t ctx,  set_gpg_passphrase_cb (passphrase_cb_s *cb, gpgme_ctx_t ctx,
444                         int cmd, HWND hwnd, const char *title)                         int cmd, HWND hwnd, const char *title)
445  {  {    
446      memset (cb, 0, sizeof *cb);      memset (cb, 0, sizeof *cb);
447      cb->gpg_cmd = cmd;      cb->gpg_cmd = cmd;
448      cb->bad_pwd = 0;      cb->bad_pwd = 0;
# Line 431  set_gpg_passphrase_cb (passphrase_cb_s * Line 450  set_gpg_passphrase_cb (passphrase_cb_s *
450      cb->cancel = 0;      cb->cancel = 0;
451      cb->hwnd = hwnd;      cb->hwnd = hwnd;
452      cb->pwd_init = 1;      cb->pwd_init = 1;
     free_if_alloc (cb->title);  
453      cb->title = m_strdup (title);      cb->title = m_strdup (title);
454      gpgme_set_passphrase_cb (ctx, passphrase_cb, cb);      gpgme_set_passphrase_cb (ctx, passphrase_cb, cb);
455      cb->gpg = ctx;      cb->gpg = ctx;
456  }  }
457    
458    void
459    set_gpg_auto_passphrase_cb (passphrase_cb_s *cb, const char *title)
460    {
461        memset (cb, 0, sizeof *cb);
462        cb->gpg_cmd = GPG_CMD_SIGN;
463        cb->bad_pwd = 0;
464        cb->is_card = 0;
465        cb->cancel = 0;
466        cb->hwnd = GetActiveWindow ();
467        cb->pwd_init = 1;
468        cb->title = m_strdup (title);
469    }
470    
471    
472    /* Release a passphrase callback @ctx. */
473    void
474    release_gpg_passphrase_cb (passphrase_cb_s *ctx)
475    {
476        if (!ctx)
477            return;
478        sfree_if_alloc (ctx->pwd);
479        free_if_alloc (ctx->title);
480        release_gpg_recipients (&ctx->recipients);
481    }
482    
483    
484  /* Release the gpg recipient list. */  /* Release the gpg recipient list. */
485  void  void
# Line 455  release_gpg_recipients (gpgme_recipient_ Line 498  release_gpg_recipients (gpgme_recipient_
498  }  }
499    
500    
   
 /* Release a passphrase callback @ctx. */  
 void  
 release_gpg_passphrase_cb (passphrase_cb_s *ctx)  
 {  
     if (!ctx)  
         return;  
     sfree_if_alloc (ctx->pwd);  
     free_if_alloc (ctx->title);  
     release_gpg_recipients (&ctx->recipients);  
 }  
   
   
501  /* _Simple_ check to measure passphrase (@pass) quality.  /* _Simple_ check to measure passphrase (@pass) quality.
502     Return value: 0 on success. */     Return value: 0 on success. */
503  int  int
504  check_passwd_quality (const char *pass, int strict)  check_passwd_quality (const char *pass, int strict)
505  {  {
506      int i, nd=0, nc=0, n;      size_t i, nd = 0, nc = 0, na = 0, n;
507    
508      /* A good passphrase should be at least 8 characters. */      /* A good passphrase should be at least 8 characters. */
509      n = strlen (pass);      n = strlen (pass);
510      if (n < 8)      if (n < 8)
511          return -1;          return -1;
512    
513      for (i=0; i < n; i++) {      for (i = 0; i < n; i++) {
514          if (isdigit (pass[i]))          if (isdigit (pass[i]))
515              nd++;              nd++;
516          if (isalpha (pass[i]))          if (isalpha (pass[i]))
517              nc++;              nc++;
518            else
519                na++;
520      }      }
521    
522      /* Check that the passphrase contains letters and numbers. */      /* Check that the passphrase contains letters and numbers. */
523      if (nd == n || nc == n)      if (nd == n || nc == n || na == n)
524          return -1;          return -1;
525    
526      return 0;      return 0;
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