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