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

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revision 32 by twoaday, Mon Oct 24 08:03:48 2005 UTC revision 48 by werner, Mon Oct 31 21:14:11 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    
45  #define item_ctrl_id2(cmd) \  
46      ((cmd) == GPG_CMD_DECRYPT? IDC_DECRYPT_HIDE : IDC_DECRYPT_SIGN_HIDE)  const char* get_symkey_algo (int algo);
47    
48    #define item_ctrl_id( cmd ) \
49  /* Overwrite passphrase and free memory. */      ((cmd) == GPG_CMD_DECRYPT? IDC_DECRYPT_PWD : IDC_DECRYPT_SIGN_PWD)
50  static void  
51  burn_passphrase (char **pwd)  #define item_ctrl_id2(cmd) \
52  {      ((cmd) == GPG_CMD_DECRYPT? IDC_DECRYPT_HIDE : IDC_DECRYPT_SIGN_HIDE)
53      char *pass = *pwd;  
54      wipememory (pass, strlen (pass));  
55      delete []pass;  /* Overwrite passphrase and free memory. */
56      *pwd = NULL;  static void
57  }  burn_passphrase (char **pwd)
58    {
59        char *pass = *pwd;
60  /* Dialog procedure for the passphrase callback. */      wipememory (pass, strlen (pass));
61  static BOOL CALLBACK      delete []pass;
62  passphrase_callback_proc (HWND dlg, UINT msg, WPARAM wparam, LPARAM lparam)      *pwd = NULL;
63  {      }
64      static passphrase_cb_s * c;  
65      gpgme_decrypt_result_t res;  
66      gpgme_sign_result_t res_sig;  /* Dialog procedure for the passphrase callback. */
67      gpgme_key_t key;  static BOOL CALLBACK
68      void *ctx = NULL, *item;  passphrase_callback_proc (HWND dlg, UINT msg, WPARAM wparam, LPARAM lparam)
69      const char *id;  {    
70      char *info;      static passphrase_cb_s * c;
71      int n;      gpgme_decrypt_result_t res;
72        gpgme_sign_result_t res_sig;
73      switch (msg) {      gpgme_key_t key;
74      case WM_INITDIALOG:      gpgme_recipient_t recip, r;
75          c = (passphrase_cb_s *)lparam;      void *ctx = NULL, *item;
76          if (!c)      const char *id;
77              BUG (0);      char *info;
78          SetWindowText (dlg, c->title);      int n;
79          if (c->gpg_cmd == GPG_CMD_DECRYPT) {  
80              SetDlgItemText (dlg, IDC_DECRYPT_LISTINF,      switch (msg) {
81                              _("Encrypted with the following public key(s)"));      case WM_INITDIALOG:
82              CheckDlgButton (dlg, IDC_DECRYPT_HIDE, BST_CHECKED);          c = (passphrase_cb_s *)lparam;
83          }          if (!c)
84          else if (c->gpg_cmd == GPG_CMD_SIGN)              BUG (0);
85              CheckDlgButton (dlg, IDC_DECRYPT_SIGN_HIDE, BST_CHECKED);          SetWindowText (dlg, c->title);
86          res = gpgme_op_decrypt_result (c->gpg);          if (c->gpg_cmd == GPG_CMD_DECRYPT) {
87          if (res != NULL && c->gpg_cmd == GPG_CMD_DECRYPT) {              SetDlgItemText (dlg, IDC_DECRYPT_LISTINF,
88              gpgme_recipient_t r;                              _("Encrypted with the following public key(s)"));
89                CheckDlgButton (dlg, IDC_DECRYPT_HIDE, BST_CHECKED);
90              /* XXX: not all ENCRYPT_TO entries are listed here. */          }
91              for (r = res->recipients; r; r = r->next) {          else if (c->gpg_cmd == GPG_CMD_SIGN)
92                  get_pubkey (r->keyid, &key);              CheckDlgButton (dlg, IDC_DECRYPT_SIGN_HIDE, BST_CHECKED);
93                  if (key) {          if (c->recipients)
94                      char *uid;              recip = c->recipients; /* recipients were already extracted. */
95                      id = key->uids->name;          else {
96                      if (!id)              /* XXX: not all ENCRYPT_TO entries are listed here. */
97                          id = _("Invalid User ID");              res = gpgme_op_decrypt_result (c->gpg);
98                      uid = utf8_to_wincp (id, strlen (id));              if (res && res->recipients)
99                      info = new char [32+strlen (uid)+1 + 4 + strlen (r->keyid)+1                  recip = res->recipients;
100                                       + strlen (key->uids->email)+1];          }
101                      if (!info)          if (recip != NULL && c->gpg_cmd == GPG_CMD_DECRYPT) {
102                          BUG (NULL);              for (r = res->recipients; r; r = r->next) {
103                      sprintf (info, "%s <%s> (%s, 0x%s)", uid, key->uids->email,                  get_pubkey (r->keyid, &key);
104                               get_key_pubalgo (r->pubkey_algo), r->keyid+8);                  if (key) {
105                      free (uid);                      char *uid;
106                                            id = key->uids->name;
107                  }                      if (!id)
108                  else {                          id = _("Invalid User ID");
109                      info = new char [32 + strlen (r->keyid)+1 + 4];                      uid = utf8_to_wincp (id, strlen (id));
110                      if (!info)                      info = new char [32+strlen (uid)+1 + 4 + strlen (r->keyid)+1
111                          BUG (NULL);                                       + strlen (key->uids->email)+1];
112                      sprintf (info, _("Unknown key ID (%s, 0x%s)"),                      if (!info)
113                               get_key_pubalgo (r->pubkey_algo), r->keyid+8);                          BUG (NULL);
114                  }                      sprintf (info, "%s <%s> (%s, 0x%s)", uid, key->uids->email,
115                  listbox_add_string (GetDlgItem (dlg, IDC_DECRYPT_LIST), info);                               get_key_pubalgo (r->pubkey_algo), r->keyid+8);
116                  free_if_alloc (info);                      free (uid);
117              }                      
118          }                  }
119          else if (c->gpg_cmd == GPG_CMD_DECRYPT)                  else {
120              EnableWindow (GetDlgItem (dlg, IDC_DECRYPT_LIST), FALSE);                      info = new char [32 + strlen (r->keyid)+1 + 4];
121          SetDlgItemText (dlg, c->gpg_cmd == GPG_CMD_DECRYPT?                      if (!info)
122                          IDC_DECRYPT_PWDINFO : IDC_DECRYPT_SIGN_PWDINFO,                          BUG (NULL);
123                          c->bad_pwd? _("Bad passphrase; Enter passphrase again") :                      sprintf (info, _("Unknown key ID (%s, 0x%s)"),
124                          _("Please enter your passphrase"));                               get_key_pubalgo (r->pubkey_algo), r->keyid+8);
125          if (c->gpg_cmd == GPG_CMD_DECRYPT) {                  }
126              SetFocus (GetDlgItem (dlg, IDC_DECRYPT_PWD));                  listbox_add_string (GetDlgItem (dlg, IDC_DECRYPT_LIST), info);
127              if (res && !res->recipients) {                  free_if_alloc (info);
128                  const char *s = _("Symmetric encryption.\n"              }
129                                    "%s encrypted data.");          }
130                  const char *alg = get_symkey_algo (c->sym.sym_algo);          else if (c->gpg_cmd == GPG_CMD_DECRYPT)
131                  info = new char[strlen (s) + strlen (alg) + 2];              EnableWindow (GetDlgItem (dlg, IDC_DECRYPT_LIST), FALSE);
132                  if (!info)          SetDlgItemText (dlg, c->gpg_cmd == GPG_CMD_DECRYPT?
133                      BUG (NULL);                          IDC_DECRYPT_PWDINFO : IDC_DECRYPT_SIGN_PWDINFO,
134                  sprintf (info, s, alg);                          c->bad_pwd? _("Bad passphrase; Enter passphrase again") :
135                  SetDlgItemText (dlg, IDC_DECRYPT_MSG, info);                          _("Please enter your passphrase"));
136                  free_if_alloc (info);          if (c->gpg_cmd == GPG_CMD_DECRYPT) {
137              }              SetFocus (GetDlgItem (dlg, IDC_DECRYPT_PWD));
138              else              if (res && !res->recipients) {
139                  SetDlgItemText (dlg, IDC_DECRYPT_MSG, c->info);                  const char *s = _("Symmetric encryption.\n"
140          }                                    "%s encrypted data.");
141          else {                  const char *alg = get_symkey_algo (c->sym.sym_algo);
142              SetFocus( GetDlgItem (dlg, IDC_DECRYPT_SIGN_PWD));                  info = new char[strlen (s) + strlen (alg) + 2];
143              SetDlgItemText (dlg, IDC_DECRYPT_SIGN_MSG, c->info);                  if (!info)
144          }                      BUG (NULL);
145          center_window (dlg, NULL);                  sprintf (info, s, alg);
146          SetForegroundWindow (dlg);                  SetDlgItemText (dlg, IDC_DECRYPT_MSG, info);
147          set_active_window (dlg);                  free_if_alloc (info);
148          return FALSE;              }
149                else
150          case WM_SYSCOMMAND:                  SetDlgItemText (dlg, IDC_DECRYPT_MSG, c->info);
151              if (LOWORD (wparam) == SC_CLOSE) {          }
152                  SetDlgItemText (dlg, item_ctrl_id (c->gpg_cmd), "");          else {
153                  c->cancel = 1;              SetFocus( GetDlgItem (dlg, IDC_DECRYPT_SIGN_PWD));
154                  EndDialog (dlg, TRUE);              SetDlgItemText (dlg, IDC_DECRYPT_SIGN_MSG, c->info);
155              }          }
156              break;          center_window (dlg, NULL);
157            SetForegroundWindow (dlg);
158          case WM_COMMAND:          set_active_window (dlg);
159              switch (HIWORD (wparam)) {          return FALSE;
160              case BN_CLICKED:  
161                  if  (LOWORD (wparam) == IDC_DECRYPT_HIDE          case WM_SYSCOMMAND:
162                      || LOWORD (wparam) == IDC_DECRYPT_SIGN_HIDE) {              if (LOWORD (wparam) == SC_CLOSE) {
163                      HWND hwnd;                  SetDlgItemText (dlg, item_ctrl_id (c->gpg_cmd), "");
164                      int hide = IsDlgButtonChecked (dlg, item_ctrl_id2 (c->gpg_cmd));                  c->cancel = 1;
165                      hwnd = GetDlgItem (dlg, item_ctrl_id (c->gpg_cmd));                  EndDialog (dlg, TRUE);
166                      SendMessage (hwnd, EM_SETPASSWORDCHAR, hide? '*' : 0, 0);              }
167                      SetFocus (hwnd);              break;
168                  }  
169              }          case WM_COMMAND:
170                switch (HIWORD (wparam)) {
171              switch (LOWORD (wparam)) {              case BN_CLICKED:
172              case IDOK:                    if  (LOWORD (wparam) == IDC_DECRYPT_HIDE
173                  /* XXX: the item is even cached when the passphrase is not                      || LOWORD (wparam) == IDC_DECRYPT_SIGN_HIDE) {
174                          correct, which means that the user needs to delete all                      HWND hwnd;
175                          cached entries to continue. */                      int hide = IsDlgButtonChecked (dlg, item_ctrl_id2 (c->gpg_cmd));
176                  if (c->pwd)                      hwnd = GetDlgItem (dlg, item_ctrl_id (c->gpg_cmd));
177                      burn_passphrase (&c->pwd);                      SendMessage (hwnd, EM_SETPASSWORDCHAR, hide? '*' : 0, 0);
178                  n = item_get_text_length (dlg, item_ctrl_id (c->gpg_cmd));                      SetFocus (hwnd);
179                  if (!n) {                  }
180                      c->pwd = new char[2];              }
181                      if (!c->pwd)  
182                          BUG (NULL);              switch (LOWORD (wparam)) {
183                      strcpy (c->pwd, "");              case IDOK:  
184                  }                  /* XXX: the item is even cached when the passphrase is not
185                  else {                          correct, which means that the user needs to delete all
186                      c->pwd = new char[n+2];                          cached entries to continue. */
187                      if (!c->pwd)                  if (c->pwd)
188                          BUG (NULL);                      burn_passphrase (&c->pwd);
189                      GetDlgItemText (dlg, item_ctrl_id (c->gpg_cmd), c->pwd, n+1);                  n = item_get_text_length (dlg, item_ctrl_id (c->gpg_cmd));
190                  }                  if (!n) {
191                  res = gpgme_op_decrypt_result (c->gpg);                      c->pwd = new char[2];
192                  if (!res)                      if (!c->pwd)
193                      res_sig = gpgme_op_sign_result (c->gpg);                          BUG (NULL);
194                  if (reg_prefs.cache_time > 0 && !c->is_card &&                      strcpy (c->pwd, "");
195                      ((res && res->recipients) || (res_sig && res_sig->signatures))) {                  }
196                      if (agent_get_cache (c->keyid, &item))                  else {
197                          agent_unlock_cache_entry (&item);                      c->pwd = new char[n+2];
198                      else                      if (!c->pwd)
199                          agent_put_cache (c->keyid, c->pwd, reg_prefs.cache_time);                          BUG (NULL);
200                  }                      GetDlgItemText (dlg, item_ctrl_id (c->gpg_cmd), c->pwd, n+1);
201                  c->cancel = 0;                  }
202                  EndDialog (dlg, TRUE);                  res = gpgme_op_decrypt_result (c->gpg);
203                  return TRUE;                  if (!res)
204                                        res_sig = gpgme_op_sign_result (c->gpg);
205              case IDCANCEL:                  if (reg_prefs.cache_time > 0 && !c->is_card &&
206                  SetDlgItemText (dlg, item_ctrl_id (c->gpg_cmd), "");                      ((res && res->recipients) || (res_sig && res_sig->signatures))) {
207                  c->cancel = 1;                      if (agent_get_cache (c->keyid, &item))
208                  EndDialog (dlg, FALSE);                          agent_unlock_cache_entry (&item);
209                  return FALSE;                      else
210              }                          agent_put_cache (c->keyid, c->pwd, reg_prefs.cache_time);
211              break;                  }
212      }                  c->cancel = 0;
213                        EndDialog (dlg, TRUE);
214      return FALSE;                  return TRUE;
215  }                  
216                case IDCANCEL:
217                    SetDlgItemText (dlg, item_ctrl_id (c->gpg_cmd), "");
218  /* Extract the main keyid from @pass_info.                  c->cancel = 1;
219     Return value: long main keyid or NULL for an error. */                  EndDialog (dlg, FALSE);
220  static const char*                  return FALSE;
221  parse_gpg_keyid (const char *pass_info)              }
222  {              break;
223      static char keyid[16+1];      }
224            
225      /* XXX: check for leading alpha-chars? */      return FALSE;
226      if (strlen (pass_info) < 16)  }
227          return NULL;  
228      /* the format of the desc buffer looks like this:  
229         request_keyid[16] main_keyid[16] keytype[1] keylength[4]  /* Extract the main keyid from @pass_info.
230         we use the main keyid to use only one cache entry. */     Return value: long main keyid or NULL for an error. */
231      strncpy (keyid, pass_info+17, 16);  static const char*
232      keyid[16] = 0;  parse_gpg_keyid (const char *pass_info)
233      return keyid;  {
234  }      static char keyid[16+1];
235        
236        /* XXX: check for leading alpha-chars? */
237  /* Parse the information in @uid_hint and @pass_info to generate      if (strlen (pass_info) < 16)
238     a input message for the user in @desc. */          return NULL;
239  static int      /* the format of the desc buffer looks like this:
240  parse_gpg_description (const char *uid_hint, const char *pass_info,         request_keyid[16] main_keyid[16] keytype[1] keylength[4]
241                         char *desc, int size)         we use the main keyid to use only one cache entry. */
242  {      strncpy (keyid, pass_info+17, 16);
243      gpgme_pubkey_algo_t algo;      keyid[16] = 0;
244      char usedkey[16+1];      return keyid;
245      char mainkey[16+1];  }
246      char *uid, *p;  
247      int n=0;  
248    /* Parse the information in @uid_hint and @pass_info to generate
249      /* Each uid_hint contains a long key-ID so it is at least 16 bytes. */     a input message for the user in @desc. */
250      if (strlen (uid_hint) < 17) {  static int
251          *desc = 0;  parse_gpg_description (const char *uid_hint, const char *pass_info,
252          return -1;                         char *desc, int size)
253      }  {
254        gpgme_pubkey_algo_t algo;
255      while (p = strsep ((char**)&pass_info, " ")) {      char usedkey[16+1];
256          switch (n++) {      char mainkey[16+1];
257          case 0: strncpy (mainkey, p, 16); mainkey[16] = 0; break;      char *uid, *p;
258          case 1: strncpy (usedkey, p, 16); usedkey[16] = 0; break;      int n=0;
259          case 2: algo = (gpgme_pubkey_algo_t)atol (p); break;  
260          }      /* Each uid_hint contains a long key-ID so it is at least 16 bytes. */
261      }      if (strlen (uid_hint) < 17) {
262      uid_hint += 16; /* skip keyid */          *desc = 0;
263      uid_hint += 1;  /* space */          return -1;
264        }
265      uid = utf8_to_wincp (uid_hint, strlen (uid_hint));  
266        while (p = strsep ((char**)&pass_info, " ")) {
267      if (strcmp (usedkey, mainkey))          switch (n++) {
268          _snprintf (desc, size-1,          case 0: strncpy (mainkey, p, 16); mainkey[16] = 0; break;
269                     _("You need a passphrase to unlock the secret key for\n"          case 1: strncpy (usedkey, p, 16); usedkey[16] = 0; break;
270                       "user: \"%s\"\n"          case 2: algo = (gpgme_pubkey_algo_t)atol (p); break;
271                       "%s key, ID %s (main key ID %s)\n"),          }
272                     uid, get_key_pubalgo (algo), usedkey+8, mainkey+8);      }
273      else if (!strcmp (usedkey, mainkey))      uid_hint += 16; /* skip keyid */
274          _snprintf (desc, size-1,      uid_hint += 1;  /* space */
275                     _("You need a passphrase to unlock the secret key for\n"  
276                       "user: \"%s\"\n"      uid = utf8_to_wincp (uid_hint, strlen (uid_hint));
277                       "%s key, ID %s\n"),  
278                       uid, get_key_pubalgo (algo), usedkey+8);      if (strcmp (usedkey, mainkey))
279      free (uid);          _snprintf (desc, size-1,
280      return 0;                     _("You need a passphrase to unlock the secret key for\n"
281  }                       "user: \"%s\"\n"
282                         "%s key, ID %s (main key ID %s)\n"),
283                       uid, get_key_pubalgo (algo), usedkey+8, mainkey+8);
284  /* Extract the serial number from the card ID @id and return it. */      else if (!strcmp (usedkey, mainkey))
285  const char*          _snprintf (desc, size-1,
286  extract_serial_no (const char *id)                     _("You need a passphrase to unlock the secret key for\n"
287  {                       "user: \"%s\"\n"
288      static char buf[8];                       "%s key, ID %s\n"),
289      char *p;                       uid, get_key_pubalgo (algo), usedkey+8);
290        free (uid);
291      p = strchr (id, '/');      return 0;
292      if (!p)  }
293          return NULL;  
294      strncpy (buf, id+(p-id)-6, 6);  
295      return buf;  /* Extract the serial number from the card ID @id and return it. */
296  }  const char*
297    extract_serial_no (const char *id)
298    {
299  /* Passphrase callback with the ability to support caching. */      static char buf[8];
300  gpgme_error_t      char *p;
301  passphrase_cb (void *hook, const char *uid_hint,  
302                 const char *passphrase_info,      p = strchr (id, '/');
303                 int prev_was_bad, int fd)      if (!p)
304  {          return NULL;
305      passphrase_cb_s *c = (passphrase_cb_s*)hook;      strncpy (buf, id+(p-id)-6, 6);
306      HANDLE hd = (HANDLE)fd;      return buf;
307      void *item;  }
308      const char *keyid, *pass;  
309      DWORD n;  
310      int rc;  /* Passphrase callback with the ability to support caching. */
311    gpgme_error_t
312      if (!c)  passphrase_cb (void *hook, const char *uid_hint,
313          return gpg_error (GPG_ERR_INV_ARG);                 const char *passphrase_info,
314      c->bad_pwd = prev_was_bad? 1 : 0;                 int prev_was_bad, int fd)
315      if (prev_was_bad && !c->cancel) {  {
316          if (c->pwd)      passphrase_cb_s *c = (passphrase_cb_s*)hook;
317              burn_passphrase (&c->pwd);      HANDLE hd = (HANDLE)fd;
318          agent_del_cache (c->keyid);      void *item;
319          c->pwd_init = 1;      const char *keyid, *pass;
320      }      DWORD n;
321        int rc;
322      if (passphrase_info) {  
323          if (strlen (passphrase_info) < 16 &&      if (!c)
324              !strstr (passphrase_info, "OPENPGP")) {          return gpg_error (GPG_ERR_INV_ARG);
325              /* assume symetric encryption. */      c->bad_pwd = prev_was_bad? 1 : 0;
326              int n=2;      if (prev_was_bad && !c->cancel) {
327              c->sym.sym_algo = atoi (passphrase_info);          if (c->pwd)
328              if (c->sym.sym_algo > 9)              burn_passphrase (&c->pwd);
329                  n++;          agent_del_cache (c->keyid);
330              /* XXX: be more strict. */          c->pwd_init = 1;
331              c->sym.s2k_mode = atoi (passphrase_info+n);      }
332              c->sym.s2k_hash = atoi (passphrase_info+n+2);  
333          }      if (passphrase_info) {
334            if (strlen (passphrase_info) < 16 &&
335          keyid = parse_gpg_keyid (passphrase_info);              !strstr (passphrase_info, "OPENPGP")) {
336          pass = agent_get_cache (keyid+8, &item);              /* assume symetric encryption. */
337          if (pass) {              int n=2;
338              agent_unlock_cache_entry (&item);              c->sym.sym_algo = atoi (passphrase_info);
339              c->pwd_init = 0;              if (c->sym.sym_algo > 9)
340              if (!WriteFile (hd, pass, strlen (pass), &n, NULL))                  n++;
341                  log_debug ("passphrase_cb: WriteFile() failed ec=%d\n", w32_errno);              /* XXX: be more strict. */
342              if (!WriteFile (hd, "\n", 1, &n, NULL))              c->sym.s2k_mode = atoi (passphrase_info+n);
343                  log_debug ("passphrase_cb: WriteFile() failed ec=%d\n", w32_errno);              c->sym.s2k_hash = atoi (passphrase_info+n+2);
344              return 0;          }
345          }  
346      }          keyid = parse_gpg_keyid (passphrase_info);
347            pass = agent_get_cache (keyid+8, &item);
348      if (c->pwd_init) {          if (pass) {
349          if (keyid && strlen (keyid) == 16)              agent_unlock_cache_entry (&item);
350              strcpy (c->keyid, keyid+8);              c->pwd_init = 0;
351                if (!WriteFile (hd, pass, strlen (pass), &n, NULL))
352          /* if @passphrase_info contains 'OPENPGP' we assume a smart card                  log_debug ("passphrase_cb: WriteFile() failed ec=%d\n", w32_errno);
353              has been used. */              if (!WriteFile (hd, "\n", 1, &n, NULL))
354          if (strstr (passphrase_info, "OPENPGP")) {                  log_debug ("passphrase_cb: WriteFile() failed ec=%d\n", w32_errno);
355              const char *s=passphrase_info;              return 0;
356              while (s && *s && *s != 'D')          }
357                  s++;      }
358              _snprintf (c->info, sizeof c->info-1,  
359                         _("Please enter the PIN to unlock your secret card key\n"      if (c->pwd_init) {
360                           "Card: %s"), extract_serial_no (s));          if (keyid && strlen (keyid) == 16)
361              c->is_card = 1;              strcpy (c->keyid, keyid+8);
362          }  
363          else if (uid_hint)          /* if @passphrase_info contains 'OPENPGP' we assume a smart card
364              parse_gpg_description (uid_hint, passphrase_info,              has been used. */
365                                     c->info, sizeof c->info - 1);          if (strstr (passphrase_info, "OPENPGP")) {
366          if (c->gpg_cmd == GPG_CMD_DECRYPT) {              const char *s=passphrase_info;
367              rc = DialogBoxParam (glob_hinst, (LPCSTR)IDD_WINPT_DECRYPT,              while (s && *s && *s != 'D')
368                                   (HWND)c->hwnd, passphrase_callback_proc,                  s++;
369                                   (LPARAM)c);              _snprintf (c->info, sizeof c->info-1,
370          }                         _("Please enter the PIN to unlock your secret card key\n"
371          else if (c->gpg_cmd == GPG_CMD_SIGN) {                           "Card: %s"), extract_serial_no (s));
372              rc = DialogBoxParam (glob_hinst, (LPCSTR)IDD_WINPT_DECRYPT_SIGN,              c->is_card = 1;
373                                   (HWND)c->hwnd, passphrase_callback_proc,          }
374                                   (LPARAM)c);          else if (uid_hint)
375          }              parse_gpg_description (uid_hint, passphrase_info,
376          if (rc == -1) {                                     c->info, sizeof c->info - 1);
377              if (!WriteFile (hd, "\n", 1, &n, NULL))          if (c->gpg_cmd == GPG_CMD_DECRYPT) {
378                  log_debug ("passphrase_cb: WriteFile() failed ec=%d\n", w32_errno);              rc = DialogBoxParam (glob_hinst, (LPCSTR)IDD_WINPT_DECRYPT,
379              return 0;                                   (HWND)c->hwnd, passphrase_callback_proc,
380          }                                   (LPARAM)c);
381          c->pwd_init = 0;          }
382      }          else if (c->gpg_cmd == GPG_CMD_SIGN) {
383      if (c->cancel) {              rc = DialogBoxParam (glob_hinst, (LPCSTR)IDD_WINPT_DECRYPT_SIGN,
384          if (!WriteFile (hd, "\n", 1, &n, NULL))                                   (HWND)c->hwnd, passphrase_callback_proc,
385              log_debug ("passphrase_cb: WriteFile() failed ec=%d\n", w32_errno);                                   (LPARAM)c);
386          return 0;          }
387      }          if (rc == -1) {
388                if (!WriteFile (hd, "\n", 1, &n, NULL))
389      WriteFile (hd, c->pwd, strlen (c->pwd), &n, NULL);                  log_debug ("passphrase_cb: WriteFile() failed ec=%d\n", w32_errno);
390      WriteFile (hd, "\n", 1, &n, NULL);              return 0;
391      return 0;          }
392  }          c->pwd_init = 0;
393        }
394        if (c->cancel) {
395  /* Initialize the given passphrase callback @cb with the          if (!WriteFile (hd, "\n", 1, &n, NULL))
396     used gpgme context @ctx, the command @cmd and a title              log_debug ("passphrase_cb: WriteFile() failed ec=%d\n", w32_errno);
397     @title for the dialog. */          return 0;
398  void      }
399  set_gpg_passphrase_cb (passphrase_cb_s *cb, gpgme_ctx_t ctx,  
400                         int cmd, HWND hwnd, const char *title)      WriteFile (hd, c->pwd, strlen (c->pwd), &n, NULL);
401  {      WriteFile (hd, "\n", 1, &n, NULL);
402      memset (cb, 0, sizeof *cb);      return 0;
403      cb->gpg_cmd = cmd;  }
404      cb->bad_pwd = 0;  
405      cb->is_card = 0;  
406      cb->cancel = 0;  /* Initialize the given passphrase callback @cb with the
407      cb->hwnd = hwnd;     used gpgme context @ctx, the command @cmd and a title
408      cb->pwd_init = 1;     @title for the dialog. */
409      free_if_alloc (cb->title);  void
410      cb->title = m_strdup (title);  set_gpg_passphrase_cb (passphrase_cb_s *cb, gpgme_ctx_t ctx,
411      if (!cb->title)                         int cmd, HWND hwnd, const char *title)
412          BUG (NULL);  {
413      gpgme_set_passphrase_cb (ctx, passphrase_cb, cb);      memset (cb, 0, sizeof *cb);
414      cb->gpg = ctx;      cb->gpg_cmd = cmd;
415  }      cb->bad_pwd = 0;
416        cb->is_card = 0;
417        cb->cancel = 0;
418  /* Release a passphrase callback @ctx. */      cb->hwnd = hwnd;
419  void      cb->pwd_init = 1;
420  release_gpg_passphrase_cb (passphrase_cb_s *ctx)      free_if_alloc (cb->title);
421  {      cb->title = m_strdup (title);
422      if (!ctx)      if (!cb->title)
423          return;          BUG (NULL);
424      sfree_if_alloc (ctx->pwd);      gpgme_set_passphrase_cb (ctx, passphrase_cb, cb);
425      free_if_alloc (ctx->title);      cb->gpg = ctx;
426  }  }
427    
428    
429  /* Simple check to measure passphrase (@pass) quality.  /* Release a passphrase callback @ctx. */
430     Return value: 0 on success. */  void
431  int  release_gpg_passphrase_cb (passphrase_cb_s *ctx)
432  check_passwd_quality (const char *pass, int strict)  {
433  {      gpgme_recipient_t r, n;
434      int i, nd=0, nc=0, n;  
435        if (!ctx)
436      n = strlen (pass);          return;
437      if (n < 8)      sfree_if_alloc (ctx->pwd);
438          return -1;      free_if_alloc (ctx->title);
439        r = ctx->recipients;
440      for (i=0; i < n; i++) {      while (r) {
441          if (isdigit (pass[i]))          n = r->next;
442              nd++;          safe_free (r->keyid);
443          if (isalpha (pass[i]))          safe_free (r);
444              nc++;          r = n;
445      }      }
446    }
447      /* check that the passphrase contains letters and numbers. */  
448      if (nd == n || nc == n)  
449          return -1;  /* Simple check to measure passphrase (@pass) quality.
450       Return value: 0 on success. */
451      return 0;  int
452  }  check_passwd_quality (const char *pass, int strict)
453    {
454        int i, nd=0, nc=0, n;
455    
456        n = strlen (pass);
457        if (n < 8)
458            return -1;
459    
460        for (i=0; i < n; i++) {
461            if (isdigit (pass[i]))
462                nd++;
463            if (isalpha (pass[i]))
464                nc++;
465        }
466    
467        /* check that the passphrase contains letters and numbers. */
468        if (nd == n || nc == n)
469            return -1;
470    
471        return 0;
472    }

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