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

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revision 34 by twoaday, Wed Oct 26 11:20:09 2005 UTC revision 77 by twoaday, Mon Nov 14 15:01:01 2005 UTC
# Line 1  Line 1 
1  /* wptPassphraseCB.cpp - GPGME Passphrase Callback  /* wptPassphraseCB.cpp - GPGME Passphrase Callback
2   *      Copyright (C) 2001, 2002, 2003, 2005 Timo Schulz   *      Copyright (C) 2001, 2002, 2003, 2005 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.
6   *   *
7   * WinPT is free software; you can redistribute it and/or   * WinPT is free software; you can redistribute it and/or
8   * modify it under the terms of the GNU General Public License   * modify it under the terms of the GNU General Public License
9   * as published by the Free Software Foundation; either version 2   * as published by the Free Software Foundation; either version 2
10   * of the License, or (at your option) any later version.   * of the License, or (at your option) any later version.
11   *     *  
12   * WinPT is distributed in the hope that it will be useful,   * WinPT is distributed in the hope that it will be useful,
13   * but WITHOUT ANY WARRANTY; without even the implied warranty of   * but WITHOUT ANY WARRANTY; without even the implied warranty of
14   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15   * General Public License for more details.   * General Public License for more details.
16   *   *
17   * You should have received a copy of the GNU General Public License   * You should have received a copy of the GNU General Public License
18   * along with WinPT; if not, write to the Free Software Foundation,   * along with WinPT; if not, write to the Free Software Foundation,
19   * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA   * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20   */   */
21    
22  #include <windows.h>  #ifdef HAVE_CONFIG_H
23  #include <ctype.h>  #include <config.h>
24    #endif
25  #include "../resource.h"  
26  #include "wptNLS.h"  #include <windows.h>
27  #include "wptW32API.h"  #include <ctype.h>
28  #include "wptVersion.h"  
29  #include "wptGPG.h"  #include "resource.h"
30  #include "wptCommonCtl.h"  #include "wptNLS.h"
31  #include "wptContext.h"  #include "wptW32API.h"
32  #include "wptDlgs.h"  #include "wptVersion.h"
33  #include "wptUTF8.h"  #include "wptGPG.h"
34  #include "wptErrors.h"  #include "wptCommonCtl.h"
35  #include "wptTypes.h"  #include "wptContext.h"
36  #include "wptKeyList.h"  #include "wptDlgs.h"
37  #include "wptAgent.h"  #include "wptUTF8.h"
38  #include "wptRegistry.h"  #include "wptErrors.h"
39    #include "wptTypes.h"
40  const char* get_symkey_algo (int algo);  #include "wptKeylist.h"
41    #include "wptAgent.h"
42  #define item_ctrl_id( cmd ) \  #include "wptRegistry.h"
43      ((cmd) == GPG_CMD_DECRYPT? IDC_DECRYPT_PWD : IDC_DECRYPT_SIGN_PWD)  
44    const char* get_symkey_algo (int algo);
45  #define item_ctrl_id2(cmd) \  
46      ((cmd) == GPG_CMD_DECRYPT? IDC_DECRYPT_HIDE : IDC_DECRYPT_SIGN_HIDE)  #define item_ctrl_id( cmd ) \
47        ((cmd) == GPG_CMD_DECRYPT? IDC_DECRYPT_PWD : IDC_DECRYPT_SIGN_PWD)
48    
49  /* Overwrite passphrase and free memory. */  #define item_ctrl_id2(cmd) \
50  static void      ((cmd) == GPG_CMD_DECRYPT? IDC_DECRYPT_HIDE : IDC_DECRYPT_SIGN_HIDE)
51  burn_passphrase (char **pwd)  
52  {  
53      char *pass = *pwd;  /* Overwrite passphrase and free memory. */
54      wipememory (pass, strlen (pass));  static void
55      delete []pass;  burn_passphrase (char **pwd)
56      *pwd = NULL;  {
57  }      char *pass = *pwd;
58        wipememory (pass, strlen (pass));
59        delete []pass;
60  /* Dialog procedure for the passphrase callback. */      *pwd = NULL;
61  static BOOL CALLBACK  }
62  passphrase_callback_proc (HWND dlg, UINT msg, WPARAM wparam, LPARAM lparam)  
63  {      
64      static passphrase_cb_s * c;  /* Dialog procedure for the passphrase callback. */
65      gpgme_decrypt_result_t res;  static BOOL CALLBACK
66      gpgme_sign_result_t res_sig;  passphrase_callback_proc (HWND dlg, UINT msg, WPARAM wparam, LPARAM lparam)
67      gpgme_key_t key;  {    
68      gpgme_recipient_t recip, r;      static passphrase_cb_s *c;
69      void *ctx = NULL, *item;      gpgme_decrypt_result_t res=NULL;
70      const char *id;      gpgme_sign_result_t res_sig=NULL;
71      char *info;      gpgme_key_t key;
72      int n;      gpgme_recipient_t recip=NULL, r;
73        void *item;
74      switch (msg) {      const char *id;
75      case WM_INITDIALOG:      char *info;
76          c = (passphrase_cb_s *)lparam;      int n;
77          if (!c)  
78              BUG (0);      switch (msg) {
79          SetWindowText (dlg, c->title);      case WM_INITDIALOG:
80          if (c->gpg_cmd == GPG_CMD_DECRYPT) {          c = (passphrase_cb_s *)lparam;
81              SetDlgItemText (dlg, IDC_DECRYPT_LISTINF,          if (!c)
82                              _("Encrypted with the following public key(s)"));              BUG (0);
83              CheckDlgButton (dlg, IDC_DECRYPT_HIDE, BST_CHECKED);          SetWindowText (dlg, c->title);
84          }          if (c->gpg_cmd == GPG_CMD_DECRYPT) {
85          else if (c->gpg_cmd == GPG_CMD_SIGN)              SetDlgItemText (dlg, IDC_DECRYPT_LISTINF,
86              CheckDlgButton (dlg, IDC_DECRYPT_SIGN_HIDE, BST_CHECKED);                              _("Encrypted with the following public key(s)"));
87          if (c->recipients)              CheckDlgButton (dlg, IDC_DECRYPT_HIDE, BST_CHECKED);
88              recip = c->recipients; /* recipients were already extracted. */          }
89          else {          else if (c->gpg_cmd == GPG_CMD_SIGN)
90              /* XXX: not all ENCRYPT_TO entries are listed here. */              CheckDlgButton (dlg, IDC_DECRYPT_SIGN_HIDE, BST_CHECKED);
91              res = gpgme_op_decrypt_result (c->gpg);          if (c->recipients)
92              if (res && res->recipients)              recip = c->recipients; /* recipients were already extracted. */
93                  recip = res->recipients;          else {
94          }              /* XXX: not all ENCRYPT_TO entries are listed here. */
95          if (recip != NULL && c->gpg_cmd == GPG_CMD_DECRYPT) {              res = gpgme_op_decrypt_result (c->gpg);
96              for (r = res->recipients; r; r = r->next) {              if (res && res->recipients)
97                  get_pubkey (r->keyid, &key);                  recip = res->recipients;
98                  if (key) {          }
99                      char *uid;          if (recip != NULL && c->gpg_cmd == GPG_CMD_DECRYPT) {
100                      id = key->uids->name;              for (r = res->recipients; r; r = r->next) {
101                      if (!id)                  get_pubkey (r->keyid, &key);
102                          id = _("Invalid User ID");                  if (key) {
103                      uid = utf8_to_wincp (id, strlen (id));                      char *uid;
104                      info = new char [32+strlen (uid)+1 + 4 + strlen (r->keyid)+1                      id = key->uids->name;
105                                       + strlen (key->uids->email)+1];                      if (!id)
106                      if (!info)                          id = _("Invalid User ID");
107                          BUG (NULL);                      uid = utf8_to_wincp (id, strlen (id));
108                      sprintf (info, "%s <%s> (%s, 0x%s)", uid, key->uids->email,                      info = new char [32+strlen (uid)+1 + 4 + strlen (r->keyid)+1
109                               get_key_pubalgo (r->pubkey_algo), r->keyid+8);                                       + strlen (key->uids->email)+1];
110                      free (uid);                      if (!info)
111                                                BUG (NULL);
112                  }                      sprintf (info, "%s <%s> (%s, 0x%s)", uid, key->uids->email,
113                  else {                               get_key_pubalgo (r->pubkey_algo), r->keyid+8);
114                      info = new char [32 + strlen (r->keyid)+1 + 4];                      free (uid);
115                      if (!info)                      
116                          BUG (NULL);                  }
117                      sprintf (info, _("Unknown key ID (%s, 0x%s)"),                  else {
118                               get_key_pubalgo (r->pubkey_algo), r->keyid+8);                      info = new char [32 + strlen (r->keyid)+1 + 4];
119                  }                      if (!info)
120                  listbox_add_string (GetDlgItem (dlg, IDC_DECRYPT_LIST), info);                          BUG (NULL);
121                  free_if_alloc (info);                      sprintf (info, _("Unknown key ID (%s, 0x%s)"),
122              }                               get_key_pubalgo (r->pubkey_algo), r->keyid+8);
123          }                  }
124          else if (c->gpg_cmd == GPG_CMD_DECRYPT)                  listbox_add_string (GetDlgItem (dlg, IDC_DECRYPT_LIST), info);
125              EnableWindow (GetDlgItem (dlg, IDC_DECRYPT_LIST), FALSE);                  free_if_alloc (info);
126          SetDlgItemText (dlg, c->gpg_cmd == GPG_CMD_DECRYPT?              }
127                          IDC_DECRYPT_PWDINFO : IDC_DECRYPT_SIGN_PWDINFO,          }
128                          c->bad_pwd? _("Bad passphrase; Enter passphrase again") :          else if (c->gpg_cmd == GPG_CMD_DECRYPT)
129                          _("Please enter your passphrase"));              EnableWindow (GetDlgItem (dlg, IDC_DECRYPT_LIST), FALSE);
130          if (c->gpg_cmd == GPG_CMD_DECRYPT) {          SetDlgItemText (dlg, c->gpg_cmd == GPG_CMD_DECRYPT?
131              SetFocus (GetDlgItem (dlg, IDC_DECRYPT_PWD));                          IDC_DECRYPT_PWDINFO : IDC_DECRYPT_SIGN_PWDINFO,
132              if (res && !res->recipients) {                          c->bad_pwd? _("Bad passphrase; Enter passphrase again") :
133                  const char *s = _("Symmetric encryption.\n"                          _("Please enter your passphrase"));
134                                    "%s encrypted data.");          if (c->gpg_cmd == GPG_CMD_DECRYPT) {
135                  const char *alg = get_symkey_algo (c->sym.sym_algo);              SetFocus (GetDlgItem (dlg, IDC_DECRYPT_PWD));
136                  info = new char[strlen (s) + strlen (alg) + 2];              if (res && !res->recipients) {
137                  if (!info)                  const char *s = _("Symmetric encryption.\n"
138                      BUG (NULL);                                    "%s encrypted data.");
139                  sprintf (info, s, alg);                  const char *alg = get_symkey_algo (c->sym.sym_algo);
140                  SetDlgItemText (dlg, IDC_DECRYPT_MSG, info);                  info = new char[strlen (s) + strlen (alg) + 2];
141                  free_if_alloc (info);                  if (!info)
142              }                      BUG (NULL);
143              else                  sprintf (info, s, alg);
144                  SetDlgItemText (dlg, IDC_DECRYPT_MSG, c->info);                  SetDlgItemText (dlg, IDC_DECRYPT_MSG, info);
145          }                  free_if_alloc (info);
146          else {              }
147              SetFocus( GetDlgItem (dlg, IDC_DECRYPT_SIGN_PWD));              else
148              SetDlgItemText (dlg, IDC_DECRYPT_SIGN_MSG, c->info);                  SetDlgItemText (dlg, IDC_DECRYPT_MSG, c->info);
149          }          }
150          center_window (dlg, NULL);          else {
151          SetForegroundWindow (dlg);              SetFocus( GetDlgItem (dlg, IDC_DECRYPT_SIGN_PWD));
152          set_active_window (dlg);              SetDlgItemText (dlg, IDC_DECRYPT_SIGN_MSG, c->info);
153          return FALSE;          }
154            center_window (dlg, NULL);
155          case WM_SYSCOMMAND:          SetForegroundWindow (dlg);
156              if (LOWORD (wparam) == SC_CLOSE) {          set_active_window (dlg);
157                  SetDlgItemText (dlg, item_ctrl_id (c->gpg_cmd), "");          return FALSE;
158                  c->cancel = 1;  
159                  EndDialog (dlg, TRUE);          case WM_SYSCOMMAND:
160              }              if (LOWORD (wparam) == SC_CLOSE) {
161              break;                  SetDlgItemText (dlg, item_ctrl_id (c->gpg_cmd), "");
162                    c->cancel = 1;
163          case WM_COMMAND:                  EndDialog (dlg, TRUE);
164              switch (HIWORD (wparam)) {              }
165              case BN_CLICKED:              break;
166                  if  (LOWORD (wparam) == IDC_DECRYPT_HIDE  
167                      || LOWORD (wparam) == IDC_DECRYPT_SIGN_HIDE) {          case WM_COMMAND:
168                      HWND hwnd;              switch (HIWORD (wparam)) {
169                      int hide = IsDlgButtonChecked (dlg, item_ctrl_id2 (c->gpg_cmd));              case BN_CLICKED:
170                      hwnd = GetDlgItem (dlg, item_ctrl_id (c->gpg_cmd));                  if  (LOWORD (wparam) == IDC_DECRYPT_HIDE
171                      SendMessage (hwnd, EM_SETPASSWORDCHAR, hide? '*' : 0, 0);                      || LOWORD (wparam) == IDC_DECRYPT_SIGN_HIDE) {
172                      SetFocus (hwnd);                      HWND hwnd;
173                  }                      int hide = IsDlgButtonChecked (dlg, item_ctrl_id2 (c->gpg_cmd));
174              }                      hwnd = GetDlgItem (dlg, item_ctrl_id (c->gpg_cmd));
175                        SendMessage (hwnd, EM_SETPASSWORDCHAR, hide? '*' : 0, 0);
176              switch (LOWORD (wparam)) {                      SetFocus (hwnd);
177              case IDOK:                    }
178                  /* XXX: the item is even cached when the passphrase is not              }
179                          correct, which means that the user needs to delete all  
180                          cached entries to continue. */              switch (LOWORD (wparam)) {
181                  if (c->pwd)              case IDOK:  
182                      burn_passphrase (&c->pwd);                  /* XXX: the item is even cached when the passphrase is not
183                  n = item_get_text_length (dlg, item_ctrl_id (c->gpg_cmd));                          correct, which means that the user needs to delete all
184                  if (!n) {                          cached entries to continue. */
185                      c->pwd = new char[2];                  if (c->pwd)
186                      if (!c->pwd)                      burn_passphrase (&c->pwd);
187                          BUG (NULL);                  n = item_get_text_length (dlg, item_ctrl_id (c->gpg_cmd));
188                      strcpy (c->pwd, "");                  if (!n) {
189                  }                      c->pwd = new char[2];
190                  else {                      if (!c->pwd)
191                      c->pwd = new char[n+2];                          BUG (NULL);
192                      if (!c->pwd)                      strcpy (c->pwd, "");
193                          BUG (NULL);                  }
194                      GetDlgItemText (dlg, item_ctrl_id (c->gpg_cmd), c->pwd, n+1);                  else {
195                  }                      c->pwd = new char[n+2];
196                  res = gpgme_op_decrypt_result (c->gpg);                      if (!c->pwd)
197                  if (!res)                          BUG (NULL);
198                      res_sig = gpgme_op_sign_result (c->gpg);                      GetDlgItemText (dlg, item_ctrl_id (c->gpg_cmd), c->pwd, n+1);
199                  if (reg_prefs.cache_time > 0 && !c->is_card &&                  }
200                      ((res && res->recipients) || (res_sig && res_sig->signatures))) {                  res = gpgme_op_decrypt_result (c->gpg);
201                      if (agent_get_cache (c->keyid, &item))                  if (!res)
202                          agent_unlock_cache_entry (&item);                      res_sig = gpgme_op_sign_result (c->gpg);            
203                      else                  if (reg_prefs.cache_time > 0 && !c->is_card &&
204                          agent_put_cache (c->keyid, c->pwd, reg_prefs.cache_time);                      (res || res_sig)) {
205                  }                      if (agent_get_cache (c->keyid, &item))                      
206                  c->cancel = 0;                          agent_unlock_cache_entry (&item);
207                  EndDialog (dlg, TRUE);                      else
208                  return TRUE;                          agent_put_cache (c->keyid, c->pwd, reg_prefs.cache_time);
209                                    }
210              case IDCANCEL:                  c->cancel = 0;
211                  SetDlgItemText (dlg, item_ctrl_id (c->gpg_cmd), "");                  EndDialog (dlg, TRUE);
212                  c->cancel = 1;                  return TRUE;
213                  EndDialog (dlg, FALSE);                  
214                  return FALSE;              case IDCANCEL:
215              }                  SetDlgItemText (dlg, item_ctrl_id (c->gpg_cmd), "");
216              break;                  c->cancel = 1;
217      }                  EndDialog (dlg, FALSE);
218                        return FALSE;
219      return FALSE;              }
220  }              break;
221        }
222        
223  /* Extract the main keyid from @pass_info.      return FALSE;
224     Return value: long main keyid or NULL for an error. */  }
225  static const char*  
226  parse_gpg_keyid (const char *pass_info)  
227  {  /* Extract the main keyid from @pass_info.
228      static char keyid[16+1];     Return value: long main keyid or NULL for an error. */
229        static const char*
230      /* XXX: check for leading alpha-chars? */  parse_gpg_keyid (const char *pass_info)
231      if (strlen (pass_info) < 16)  {
232          return NULL;      static char keyid[16+1];
233      /* the format of the desc buffer looks like this:      
234         request_keyid[16] main_keyid[16] keytype[1] keylength[4]      /* XXX: check for leading alpha-chars? */
235         we use the main keyid to use only one cache entry. */      if (strlen (pass_info) < 16) {
236      strncpy (keyid, pass_info+17, 16);          log_debug ("parse_gpg_keyid: error '%s'\r\n", pass_info);
237      keyid[16] = 0;          return NULL;
238      return keyid;      }
239  }      /* the format of the desc buffer looks like this:
240           request_keyid[16] main_keyid[16] keytype[1] keylength[4]
241           we use the main keyid to use only one cache entry. */
242  /* Parse the information in @uid_hint and @pass_info to generate      strncpy (keyid, pass_info+17, 16);
243     a input message for the user in @desc. */      keyid[16] = 0;
244  static int      return keyid;
245  parse_gpg_description (const char *uid_hint, const char *pass_info,  }
246                         char *desc, int size)  
247  {  
248      gpgme_pubkey_algo_t algo;  /* Parse the information in @uid_hint and @pass_info to generate
249      char usedkey[16+1];     a input message for the user in @desc. */
250      char mainkey[16+1];  static int
251      char *uid, *p;  parse_gpg_description (const char *uid_hint, const char *pass_info,
252      int n=0;                         char *desc, int size)
253    {
254      /* Each uid_hint contains a long key-ID so it is at least 16 bytes. */      gpgme_pubkey_algo_t algo;
255      if (strlen (uid_hint) < 17) {      char usedkey[16+1];
256          *desc = 0;      char mainkey[16+1];
257          return -1;      char *uid, *p;
258      }      int n=0;
259    
260      while (p = strsep ((char**)&pass_info, " ")) {      algo = (gpgme_pubkey_algo_t)0;
261          switch (n++) {      /* Each uid_hint contains a long key-ID so it is at least 16 bytes. */
262          case 0: strncpy (mainkey, p, 16); mainkey[16] = 0; break;      if (strlen (uid_hint) < 17) {
263          case 1: strncpy (usedkey, p, 16); usedkey[16] = 0; break;          *desc = 0;
264          case 2: algo = (gpgme_pubkey_algo_t)atol (p); break;          log_debug ("parse_gpg_description: error '%s'\r\n", uid_hint);
265          }          return -1;
266      }      }
267      uid_hint += 16; /* skip keyid */  
268      uid_hint += 1;  /* space */      while (p = strsep ((char**)&pass_info, " ")) {
269            switch (n++) {
270      uid = utf8_to_wincp (uid_hint, strlen (uid_hint));          case 0: strncpy (mainkey, p, 16); mainkey[16] = 0; break;
271            case 1: strncpy (usedkey, p, 16); usedkey[16] = 0; break;
272      if (strcmp (usedkey, mainkey))          case 2: algo = (gpgme_pubkey_algo_t)atol (p); break;
273          _snprintf (desc, size-1,          }
274                     _("You need a passphrase to unlock the secret key for\n"      }
275                       "user: \"%s\"\n"      uid_hint += 16; /* skip keyid */
276                       "%s key, ID %s (main key ID %s)\n"),      uid_hint += 1;  /* space */
277                     uid, get_key_pubalgo (algo), usedkey+8, mainkey+8);  
278      else if (!strcmp (usedkey, mainkey))      uid = utf8_to_wincp (uid_hint, strlen (uid_hint));
279          _snprintf (desc, size-1,  
280                     _("You need a passphrase to unlock the secret key for\n"      if (strcmp (usedkey, mainkey))
281                       "user: \"%s\"\n"          _snprintf (desc, size-1,
282                       "%s key, ID %s\n"),                     _("You need a passphrase to unlock the secret key for\n"
283                       uid, get_key_pubalgo (algo), usedkey+8);                       "user: \"%s\"\n"
284      free (uid);                       "%s key, ID %s (main key ID %s)\n"),
285      return 0;                     uid, get_key_pubalgo (algo), usedkey+8, mainkey+8);
286  }      else if (!strcmp (usedkey, mainkey))
287            _snprintf (desc, size-1,
288                       _("You need a passphrase to unlock the secret key for\n"
289  /* Extract the serial number from the card ID @id and return it. */                       "user: \"%s\"\n"
290  const char*                       "%s key, ID %s\n"),
291  extract_serial_no (const char *id)                       uid, get_key_pubalgo (algo), usedkey+8);
292  {      free (uid);
293      static char buf[8];      return 0;
294      char *p;  }
295    
296      p = strchr (id, '/');  
297      if (!p)  /* Extract the serial number from the card ID @id and return it. */
298          return NULL;  const char*
299      strncpy (buf, id+(p-id)-6, 6);  extract_serial_no (const char *id)
300      return buf;  {
301  }      static char buf[8];
302        char *p;
303    
304  /* Passphrase callback with the ability to support caching. */      p = strchr (id, '/');
305  gpgme_error_t      if (!p) {
306  passphrase_cb (void *hook, const char *uid_hint,          log_debug ("extract_serial_no: error '%s'\r\n", id);
307                 const char *passphrase_info,          return NULL;
308                 int prev_was_bad, int fd)      }
309  {      strncpy (buf, id+(p-id)-6, 6);
310      passphrase_cb_s *c = (passphrase_cb_s*)hook;      return buf;
311      HANDLE hd = (HANDLE)fd;  }
312      void *item;  
313      const char *keyid, *pass;  
314      DWORD n;  /* Passphrase callback with the ability to support caching. */
315      int rc;  gpgme_error_t
316    passphrase_cb (void *hook, const char *uid_hint,
317      if (!c)                 const char *passphrase_info,
318          return gpg_error (GPG_ERR_INV_ARG);                 int prev_was_bad, int fd)
319      c->bad_pwd = prev_was_bad? 1 : 0;  {
320      if (prev_was_bad && !c->cancel) {      passphrase_cb_s *c = (passphrase_cb_s*)hook;
321          if (c->pwd)      HANDLE hd = (HANDLE)fd;
322              burn_passphrase (&c->pwd);      void *item;
323          agent_del_cache (c->keyid);      const char *keyid=NULL, *pass;
324          c->pwd_init = 1;      DWORD n;
325      }      int rc = 0;
326    
327      if (passphrase_info) {      if (!c) {
328          if (strlen (passphrase_info) < 16 &&          log_debug ("passphrase_cb: error '!c'\r\n");
329              !strstr (passphrase_info, "OPENPGP")) {          return gpg_error (GPG_ERR_INV_ARG);
330              /* assume symetric encryption. */      }
331              int n=2;      c->bad_pwd = prev_was_bad? 1 : 0;
332              c->sym.sym_algo = atoi (passphrase_info);      if (prev_was_bad && !c->cancel) {
333              if (c->sym.sym_algo > 9)          if (c->pwd)
334                  n++;              burn_passphrase (&c->pwd);
335              /* XXX: be more strict. */          agent_del_cache (c->keyid);
336              c->sym.s2k_mode = atoi (passphrase_info+n);          c->pwd_init = 1;
337              c->sym.s2k_hash = atoi (passphrase_info+n+2);      }
338          }  
339        if (passphrase_info) {
340          keyid = parse_gpg_keyid (passphrase_info);          if (strlen (passphrase_info) < 16 &&
341          pass = agent_get_cache (keyid+8, &item);              !strstr (passphrase_info, "OPENPGP")) {
342          if (pass) {              /* assume symetric encryption. */
343              agent_unlock_cache_entry (&item);              int pos=2;
344              c->pwd_init = 0;              c->sym.sym_algo = atoi (passphrase_info);
345              if (!WriteFile (hd, pass, strlen (pass), &n, NULL))              if (c->sym.sym_algo > 9)
346                  log_debug ("passphrase_cb: WriteFile() failed ec=%d\n", w32_errno);                  pos++;
347              if (!WriteFile (hd, "\n", 1, &n, NULL))              /* XXX: be more strict. */
348                  log_debug ("passphrase_cb: WriteFile() failed ec=%d\n", w32_errno);              c->sym.s2k_mode = atoi (passphrase_info+pos);
349              return 0;              c->sym.s2k_hash = atoi (passphrase_info+pos+2);
350          }          }
351      }  
352            keyid = parse_gpg_keyid (passphrase_info);
353      if (c->pwd_init) {          pass = agent_get_cache (keyid+8, &item);        
354          if (keyid && strlen (keyid) == 16)          if (pass) {
355              strcpy (c->keyid, keyid+8);              agent_unlock_cache_entry (&item);
356                c->pwd_init = 0;
357          /* if @passphrase_info contains 'OPENPGP' we assume a smart card              if (!WriteFile (hd, pass, strlen (pass), &n, NULL))
358              has been used. */                  log_debug ("passphrase_cb: WriteFile() failed ec=%d\n", w32_errno);
359          if (strstr (passphrase_info, "OPENPGP")) {              if (!WriteFile (hd, "\n", 1, &n, NULL))
360              const char *s=passphrase_info;                  log_debug ("passphrase_cb: WriteFile() failed ec=%d\n", w32_errno);
361              while (s && *s && *s != 'D')              return 0;
362                  s++;          }
363              _snprintf (c->info, sizeof c->info-1,      }
364                         _("Please enter the PIN to unlock your secret card key\n"  
365                           "Card: %s"), extract_serial_no (s));      if (c->pwd_init) {
366              c->is_card = 1;          if (keyid && strlen (keyid) == 16)
367          }              strcpy (c->keyid, keyid+8);
368          else if (uid_hint)  
369              parse_gpg_description (uid_hint, passphrase_info,          /* if @passphrase_info contains 'OPENPGP' we assume a smart card
370                                     c->info, sizeof c->info - 1);              has been used. */
371          if (c->gpg_cmd == GPG_CMD_DECRYPT) {          if (strstr (passphrase_info, "OPENPGP")) {
372              rc = DialogBoxParam (glob_hinst, (LPCSTR)IDD_WINPT_DECRYPT,              const char *s=passphrase_info;
373                                   (HWND)c->hwnd, passphrase_callback_proc,              while (s && *s && *s != 'D')
374                                   (LPARAM)c);                  s++;
375          }              _snprintf (c->info, sizeof c->info-1,
376          else if (c->gpg_cmd == GPG_CMD_SIGN) {                         _("Please enter the PIN to unlock your secret card key\n"
377              rc = DialogBoxParam (glob_hinst, (LPCSTR)IDD_WINPT_DECRYPT_SIGN,                           "Card: %s"), extract_serial_no (s));
378                                   (HWND)c->hwnd, passphrase_callback_proc,              c->is_card = 1;
379                                   (LPARAM)c);          }
380          }          else if (uid_hint)
381          if (rc == -1) {              parse_gpg_description (uid_hint, passphrase_info,
382              if (!WriteFile (hd, "\n", 1, &n, NULL))                                     c->info, sizeof c->info - 1);
383                  log_debug ("passphrase_cb: WriteFile() failed ec=%d\n", w32_errno);          if (c->gpg_cmd == GPG_CMD_DECRYPT) {
384              return 0;              rc = DialogBoxParam (glob_hinst, (LPCSTR)IDD_WINPT_DECRYPT,
385          }                                   (HWND)c->hwnd, passphrase_callback_proc,
386          c->pwd_init = 0;                                   (LPARAM)c);
387      }          }
388      if (c->cancel) {          else if (c->gpg_cmd == GPG_CMD_SIGN) {
389          if (!WriteFile (hd, "\n", 1, &n, NULL))              rc = DialogBoxParam (glob_hinst, (LPCSTR)IDD_WINPT_DECRYPT_SIGN,
390              log_debug ("passphrase_cb: WriteFile() failed ec=%d\n", w32_errno);                                   (HWND)c->hwnd, passphrase_callback_proc,
391          return 0;                                   (LPARAM)c);
392      }          }
393            if (rc == -1) {
394      WriteFile (hd, c->pwd, strlen (c->pwd), &n, NULL);              if (!WriteFile (hd, "\n", 1, &n, NULL))
395      WriteFile (hd, "\n", 1, &n, NULL);                  log_debug ("passphrase_cb: WriteFile() failed ec=%d\n", w32_errno);
396      return 0;              return 0;
397  }          }
398            c->pwd_init = 0;
399        }
400  /* Initialize the given passphrase callback @cb with the      if (c->cancel) {
401     used gpgme context @ctx, the command @cmd and a title          if (!WriteFile (hd, "\n", 1, &n, NULL))
402     @title for the dialog. */              log_debug ("passphrase_cb: WriteFile() failed ec=%d\n", w32_errno);
403  void          return 0;
404  set_gpg_passphrase_cb (passphrase_cb_s *cb, gpgme_ctx_t ctx,      }
405                         int cmd, HWND hwnd, const char *title)  
406  {      if (!WriteFile (hd, c->pwd, strlen (c->pwd), &n, NULL))
407      memset (cb, 0, sizeof *cb);          log_debug ("passphrase_cb: WriteFile() failed ec=%d\n", w32_errno);
408      cb->gpg_cmd = cmd;      if (!WriteFile (hd, "\n", 1, &n, NULL))
409      cb->bad_pwd = 0;          log_debug ("passphrase_cb: WriteFile() failed ec=%d\n", w32_errno);
410      cb->is_card = 0;      return 0;
411      cb->cancel = 0;  }
412      cb->hwnd = hwnd;  
413      cb->pwd_init = 1;  
414      free_if_alloc (cb->title);  /* Initialize the given passphrase callback @cb with the
415      cb->title = m_strdup (title);     used gpgme context @ctx, the command @cmd and a title
416      if (!cb->title)     @title for the dialog. */
417          BUG (NULL);  void
418      gpgme_set_passphrase_cb (ctx, passphrase_cb, cb);  set_gpg_passphrase_cb (passphrase_cb_s *cb, gpgme_ctx_t ctx,
419      cb->gpg = ctx;                         int cmd, HWND hwnd, const char *title)
420  }  {
421        memset (cb, 0, sizeof *cb);
422        cb->gpg_cmd = cmd;
423  /* Release a passphrase callback @ctx. */      cb->bad_pwd = 0;
424  void      cb->is_card = 0;
425  release_gpg_passphrase_cb (passphrase_cb_s *ctx)      cb->cancel = 0;
426  {      cb->hwnd = hwnd;
427      gpgme_recipient_t r, n;      cb->pwd_init = 1;
428        free_if_alloc (cb->title);
429      if (!ctx)      cb->title = m_strdup (title);
430          return;      if (!cb->title)
431      sfree_if_alloc (ctx->pwd);          BUG (NULL);
432      free_if_alloc (ctx->title);      gpgme_set_passphrase_cb (ctx, passphrase_cb, cb);
433      r = ctx->recipients;      cb->gpg = ctx;
434      while (r) {  }
435          n = r->next;  
436          safe_free (r->keyid);  
437          safe_free (r);  /* Release a passphrase callback @ctx. */
438          r = n;  void
439      }  release_gpg_passphrase_cb (passphrase_cb_s *ctx)
440  }  {
441        gpgme_recipient_t r, n;
442    
443  /* Simple check to measure passphrase (@pass) quality.      if (!ctx)
444     Return value: 0 on success. */          return;
445  int      sfree_if_alloc (ctx->pwd);
446  check_passwd_quality (const char *pass, int strict)      free_if_alloc (ctx->title);
447  {      r = ctx->recipients;
448      int i, nd=0, nc=0, n;      while (r) {
449            n = r->next;
450      n = strlen (pass);          safe_free (r->keyid);
451      if (n < 8)          safe_free (r);
452          return -1;          r = n;
453        }
454      for (i=0; i < n; i++) {  }
455          if (isdigit (pass[i]))  
456              nd++;  
457          if (isalpha (pass[i]))  /* Simple check to measure passphrase (@pass) quality.
458              nc++;     Return value: 0 on success. */
459      }  int
460    check_passwd_quality (const char *pass, int strict)
461      /* check that the passphrase contains letters and numbers. */  {
462      if (nd == n || nc == n)      int i, nd=0, nc=0, n;
463          return -1;  
464        n = strlen (pass);
465      return 0;      if (n < 8)
466  }          return -1;
467    
468        for (i=0; i < n; i++) {
469            if (isdigit (pass[i]))
470                nd++;
471            if (isalpha (pass[i]))
472                nc++;
473        }
474    
475        /* check that the passphrase contains letters and numbers. */
476        if (nd == n || nc == n)
477            return -1;
478    
479        return 0;
480    }
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