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

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revision 33 by twoaday, Tue Oct 25 07:46:20 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      gpgme_recipient_t recip, r;  passphrase_callback_proc (HWND dlg, UINT msg, WPARAM wparam, LPARAM lparam)
69      void *ctx = NULL, *item;  {    
70      const char *id;      static passphrase_cb_s * c;
71      char *info;      gpgme_decrypt_result_t res;
72      int n;      gpgme_sign_result_t res_sig;
73        gpgme_key_t key;
74      switch (msg) {      gpgme_recipient_t recip, r;
75      case WM_INITDIALOG:      void *ctx = NULL, *item;
76          c = (passphrase_cb_s *)lparam;      const char *id;
77          if (!c)      char *info;
78              BUG (0);      int n;
79          SetWindowText (dlg, c->title);  
80          if (c->gpg_cmd == GPG_CMD_DECRYPT) {      switch (msg) {
81              SetDlgItemText (dlg, IDC_DECRYPT_LISTINF,      case WM_INITDIALOG:
82                              _("Encrypted with the following public key(s)"));          c = (passphrase_cb_s *)lparam;
83              CheckDlgButton (dlg, IDC_DECRYPT_HIDE, BST_CHECKED);          if (!c)
84          }              BUG (0);
85          else if (c->gpg_cmd == GPG_CMD_SIGN)          SetWindowText (dlg, c->title);
86              CheckDlgButton (dlg, IDC_DECRYPT_SIGN_HIDE, BST_CHECKED);          if (c->gpg_cmd == GPG_CMD_DECRYPT) {
87          if (c->recipients)              SetDlgItemText (dlg, IDC_DECRYPT_LISTINF,
88              recip = c->recipients; /* recipients were already extracted. */                              _("Encrypted with the following public key(s)"));
89          else {              CheckDlgButton (dlg, IDC_DECRYPT_HIDE, BST_CHECKED);
90              /* XXX: not all ENCRYPT_TO entries are listed here. */          }
91              res = gpgme_op_decrypt_result (c->gpg);          else if (c->gpg_cmd == GPG_CMD_SIGN)
92              if (res->recipients)              CheckDlgButton (dlg, IDC_DECRYPT_SIGN_HIDE, BST_CHECKED);
93                  recip = res->recipients;          if (c->recipients)
94          }              recip = c->recipients; /* recipients were already extracted. */
95          if (recip != NULL && c->gpg_cmd == GPG_CMD_DECRYPT) {          else {
96              for (r = res->recipients; r; r = r->next) {              /* XXX: not all ENCRYPT_TO entries are listed here. */
97                  get_pubkey (r->keyid, &key);              res = gpgme_op_decrypt_result (c->gpg);
98                  if (key) {              if (res && res->recipients)
99                      char *uid;                  recip = res->recipients;
100                      id = key->uids->name;          }
101                      if (!id)          if (recip != NULL && c->gpg_cmd == GPG_CMD_DECRYPT) {
102                          id = _("Invalid User ID");              for (r = res->recipients; r; r = r->next) {
103                      uid = utf8_to_wincp (id, strlen (id));                  get_pubkey (r->keyid, &key);
104                      info = new char [32+strlen (uid)+1 + 4 + strlen (r->keyid)+1                  if (key) {
105                                       + strlen (key->uids->email)+1];                      char *uid;
106                      if (!info)                      id = key->uids->name;
107                          BUG (NULL);                      if (!id)
108                      sprintf (info, "%s <%s> (%s, 0x%s)", uid, key->uids->email,                          id = _("Invalid User ID");
109                               get_key_pubalgo (r->pubkey_algo), r->keyid+8);                      uid = utf8_to_wincp (id, strlen (id));
110                      free (uid);                      info = new char [32+strlen (uid)+1 + 4 + strlen (r->keyid)+1
111                                                             + strlen (key->uids->email)+1];
112                  }                      if (!info)
113                  else {                          BUG (NULL);
114                      info = new char [32 + strlen (r->keyid)+1 + 4];                      sprintf (info, "%s <%s> (%s, 0x%s)", uid, key->uids->email,
115                      if (!info)                               get_key_pubalgo (r->pubkey_algo), r->keyid+8);
116                          BUG (NULL);                      free (uid);
117                      sprintf (info, _("Unknown key ID (%s, 0x%s)"),                      
118                               get_key_pubalgo (r->pubkey_algo), r->keyid+8);                  }
119                  }                  else {
120                  listbox_add_string (GetDlgItem (dlg, IDC_DECRYPT_LIST), info);                      info = new char [32 + strlen (r->keyid)+1 + 4];
121                  free_if_alloc (info);                      if (!info)
122              }                          BUG (NULL);
123          }                      sprintf (info, _("Unknown key ID (%s, 0x%s)"),
124          else if (c->gpg_cmd == GPG_CMD_DECRYPT)                               get_key_pubalgo (r->pubkey_algo), r->keyid+8);
125              EnableWindow (GetDlgItem (dlg, IDC_DECRYPT_LIST), FALSE);                  }
126          SetDlgItemText (dlg, c->gpg_cmd == GPG_CMD_DECRYPT?                  listbox_add_string (GetDlgItem (dlg, IDC_DECRYPT_LIST), info);
127                          IDC_DECRYPT_PWDINFO : IDC_DECRYPT_SIGN_PWDINFO,                  free_if_alloc (info);
128                          c->bad_pwd? _("Bad passphrase; Enter passphrase again") :              }
129                          _("Please enter your passphrase"));          }
130          if (c->gpg_cmd == GPG_CMD_DECRYPT) {          else if (c->gpg_cmd == GPG_CMD_DECRYPT)
131              SetFocus (GetDlgItem (dlg, IDC_DECRYPT_PWD));              EnableWindow (GetDlgItem (dlg, IDC_DECRYPT_LIST), FALSE);
132              if (res && !res->recipients) {          SetDlgItemText (dlg, c->gpg_cmd == GPG_CMD_DECRYPT?
133                  const char *s = _("Symmetric encryption.\n"                          IDC_DECRYPT_PWDINFO : IDC_DECRYPT_SIGN_PWDINFO,
134                                    "%s encrypted data.");                          c->bad_pwd? _("Bad passphrase; Enter passphrase again") :
135                  const char *alg = get_symkey_algo (c->sym.sym_algo);                          _("Please enter your passphrase"));
136                  info = new char[strlen (s) + strlen (alg) + 2];          if (c->gpg_cmd == GPG_CMD_DECRYPT) {
137                  if (!info)              SetFocus (GetDlgItem (dlg, IDC_DECRYPT_PWD));
138                      BUG (NULL);              if (res && !res->recipients) {
139                  sprintf (info, s, alg);                  const char *s = _("Symmetric encryption.\n"
140                  SetDlgItemText (dlg, IDC_DECRYPT_MSG, info);                                    "%s encrypted data.");
141                  free_if_alloc (info);                  const char *alg = get_symkey_algo (c->sym.sym_algo);
142              }                  info = new char[strlen (s) + strlen (alg) + 2];
143              else                  if (!info)
144                  SetDlgItemText (dlg, IDC_DECRYPT_MSG, c->info);                      BUG (NULL);
145          }                  sprintf (info, s, alg);
146          else {                  SetDlgItemText (dlg, IDC_DECRYPT_MSG, info);
147              SetFocus( GetDlgItem (dlg, IDC_DECRYPT_SIGN_PWD));                  free_if_alloc (info);
148              SetDlgItemText (dlg, IDC_DECRYPT_SIGN_MSG, c->info);              }
149          }              else
150          center_window (dlg, NULL);                  SetDlgItemText (dlg, IDC_DECRYPT_MSG, c->info);
151          SetForegroundWindow (dlg);          }
152          set_active_window (dlg);          else {
153          return FALSE;              SetFocus( GetDlgItem (dlg, IDC_DECRYPT_SIGN_PWD));
154                SetDlgItemText (dlg, IDC_DECRYPT_SIGN_MSG, c->info);
155          case WM_SYSCOMMAND:          }
156              if (LOWORD (wparam) == SC_CLOSE) {          center_window (dlg, NULL);
157                  SetDlgItemText (dlg, item_ctrl_id (c->gpg_cmd), "");          SetForegroundWindow (dlg);
158                  c->cancel = 1;          set_active_window (dlg);
159                  EndDialog (dlg, TRUE);          return FALSE;
160              }  
161              break;          case WM_SYSCOMMAND:
162                if (LOWORD (wparam) == SC_CLOSE) {
163          case WM_COMMAND:                  SetDlgItemText (dlg, item_ctrl_id (c->gpg_cmd), "");
164              switch (HIWORD (wparam)) {                  c->cancel = 1;
165              case BN_CLICKED:                  EndDialog (dlg, TRUE);
166                  if  (LOWORD (wparam) == IDC_DECRYPT_HIDE              }
167                      || LOWORD (wparam) == IDC_DECRYPT_SIGN_HIDE) {              break;
168                      HWND hwnd;  
169                      int hide = IsDlgButtonChecked (dlg, item_ctrl_id2 (c->gpg_cmd));          case WM_COMMAND:
170                      hwnd = GetDlgItem (dlg, item_ctrl_id (c->gpg_cmd));              switch (HIWORD (wparam)) {
171                      SendMessage (hwnd, EM_SETPASSWORDCHAR, hide? '*' : 0, 0);              case BN_CLICKED:
172                      SetFocus (hwnd);                  if  (LOWORD (wparam) == IDC_DECRYPT_HIDE
173                  }                      || LOWORD (wparam) == IDC_DECRYPT_SIGN_HIDE) {
174              }                      HWND hwnd;
175                        int hide = IsDlgButtonChecked (dlg, item_ctrl_id2 (c->gpg_cmd));
176              switch (LOWORD (wparam)) {                      hwnd = GetDlgItem (dlg, item_ctrl_id (c->gpg_cmd));
177              case IDOK:                        SendMessage (hwnd, EM_SETPASSWORDCHAR, hide? '*' : 0, 0);
178                  /* XXX: the item is even cached when the passphrase is not                      SetFocus (hwnd);
179                          correct, which means that the user needs to delete all                  }
180                          cached entries to continue. */              }
181                  if (c->pwd)  
182                      burn_passphrase (&c->pwd);              switch (LOWORD (wparam)) {
183                  n = item_get_text_length (dlg, item_ctrl_id (c->gpg_cmd));              case IDOK:  
184                  if (!n) {                  /* XXX: the item is even cached when the passphrase is not
185                      c->pwd = new char[2];                          correct, which means that the user needs to delete all
186                      if (!c->pwd)                          cached entries to continue. */
187                          BUG (NULL);                  if (c->pwd)
188                      strcpy (c->pwd, "");                      burn_passphrase (&c->pwd);
189                  }                  n = item_get_text_length (dlg, item_ctrl_id (c->gpg_cmd));
190                  else {                  if (!n) {
191                      c->pwd = new char[n+2];                      c->pwd = new char[2];
192                      if (!c->pwd)                      if (!c->pwd)
193                          BUG (NULL);                          BUG (NULL);
194                      GetDlgItemText (dlg, item_ctrl_id (c->gpg_cmd), c->pwd, n+1);                      strcpy (c->pwd, "");
195                  }                  }
196                  res = gpgme_op_decrypt_result (c->gpg);                  else {
197                  if (!res)                      c->pwd = new char[n+2];
198                      res_sig = gpgme_op_sign_result (c->gpg);                      if (!c->pwd)
199                  if (reg_prefs.cache_time > 0 && !c->is_card &&                          BUG (NULL);
200                      ((res && res->recipients) || (res_sig && res_sig->signatures))) {                      GetDlgItemText (dlg, item_ctrl_id (c->gpg_cmd), c->pwd, n+1);
201                      if (agent_get_cache (c->keyid, &item))                  }
202                          agent_unlock_cache_entry (&item);                  res = gpgme_op_decrypt_result (c->gpg);
203                      else                  if (!res)
204                          agent_put_cache (c->keyid, c->pwd, reg_prefs.cache_time);                      res_sig = gpgme_op_sign_result (c->gpg);
205                  }                  if (reg_prefs.cache_time > 0 && !c->is_card &&
206                  c->cancel = 0;                      ((res && res->recipients) || (res_sig && res_sig->signatures))) {
207                  EndDialog (dlg, TRUE);                      if (agent_get_cache (c->keyid, &item))
208                  return TRUE;                          agent_unlock_cache_entry (&item);
209                                        else
210              case IDCANCEL:                          agent_put_cache (c->keyid, c->pwd, reg_prefs.cache_time);
211                  SetDlgItemText (dlg, item_ctrl_id (c->gpg_cmd), "");                  }
212                  c->cancel = 1;                  c->cancel = 0;
213                  EndDialog (dlg, FALSE);                  EndDialog (dlg, TRUE);
214                  return FALSE;                  return TRUE;
215              }                  
216              break;              case IDCANCEL:
217      }                  SetDlgItemText (dlg, item_ctrl_id (c->gpg_cmd), "");
218                        c->cancel = 1;
219      return FALSE;                  EndDialog (dlg, FALSE);
220  }                  return FALSE;
221                }
222                break;
223  /* Extract the main keyid from @pass_info.      }
224     Return value: long main keyid or NULL for an error. */      
225  static const char*      return FALSE;
226  parse_gpg_keyid (const char *pass_info)  }
227  {  
228      static char keyid[16+1];  
229        /* Extract the main keyid from @pass_info.
230      /* XXX: check for leading alpha-chars? */     Return value: long main keyid or NULL for an error. */
231      if (strlen (pass_info) < 16)  static const char*
232          return NULL;  parse_gpg_keyid (const char *pass_info)
233      /* the format of the desc buffer looks like this:  {
234         request_keyid[16] main_keyid[16] keytype[1] keylength[4]      static char keyid[16+1];
235         we use the main keyid to use only one cache entry. */      
236      strncpy (keyid, pass_info+17, 16);      /* XXX: check for leading alpha-chars? */
237      keyid[16] = 0;      if (strlen (pass_info) < 16)
238      return keyid;          return NULL;
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, " ")) {      /* Each uid_hint contains a long key-ID so it is at least 16 bytes. */
261          switch (n++) {      if (strlen (uid_hint) < 17) {
262          case 0: strncpy (mainkey, p, 16); mainkey[16] = 0; break;          *desc = 0;
263          case 1: strncpy (usedkey, p, 16); usedkey[16] = 0; break;          return -1;
264          case 2: algo = (gpgme_pubkey_algo_t)atol (p); break;      }
265          }  
266      }      while (p = strsep ((char**)&pass_info, " ")) {
267      uid_hint += 16; /* skip keyid */          switch (n++) {
268      uid_hint += 1;  /* space */          case 0: strncpy (mainkey, p, 16); mainkey[16] = 0; break;
269            case 1: strncpy (usedkey, p, 16); usedkey[16] = 0; break;
270      uid = utf8_to_wincp (uid_hint, strlen (uid_hint));          case 2: algo = (gpgme_pubkey_algo_t)atol (p); break;
271            }
272      if (strcmp (usedkey, mainkey))      }
273          _snprintf (desc, size-1,      uid_hint += 16; /* skip keyid */
274                     _("You need a passphrase to unlock the secret key for\n"      uid_hint += 1;  /* space */
275                       "user: \"%s\"\n"  
276                       "%s key, ID %s (main key ID %s)\n"),      uid = utf8_to_wincp (uid_hint, strlen (uid_hint));
277                     uid, get_key_pubalgo (algo), usedkey+8, mainkey+8);  
278      else if (!strcmp (usedkey, mainkey))      if (strcmp (usedkey, mainkey))
279          _snprintf (desc, size-1,          _snprintf (desc, size-1,
280                     _("You need a passphrase to unlock the secret key for\n"                     _("You need a passphrase to unlock the secret key for\n"
281                       "user: \"%s\"\n"                       "user: \"%s\"\n"
282                       "%s key, ID %s\n"),                       "%s key, ID %s (main key ID %s)\n"),
283                       uid, get_key_pubalgo (algo), usedkey+8);                     uid, get_key_pubalgo (algo), usedkey+8, mainkey+8);
284      free (uid);      else if (!strcmp (usedkey, mainkey))
285      return 0;          _snprintf (desc, size-1,
286  }                     _("You need a passphrase to unlock the secret key for\n"
287                         "user: \"%s\"\n"
288                         "%s key, ID %s\n"),
289  /* Extract the serial number from the card ID @id and return it. */                       uid, get_key_pubalgo (algo), usedkey+8);
290  const char*      free (uid);
291  extract_serial_no (const char *id)      return 0;
292  {  }
293      static char buf[8];  
294      char *p;  
295    /* Extract the serial number from the card ID @id and return it. */
296      p = strchr (id, '/');  const char*
297      if (!p)  extract_serial_no (const char *id)
298          return NULL;  {
299      strncpy (buf, id+(p-id)-6, 6);      static char buf[8];
300      return buf;      char *p;
301  }  
302        p = strchr (id, '/');
303        if (!p)
304  /* Passphrase callback with the ability to support caching. */          return NULL;
305  gpgme_error_t      strncpy (buf, id+(p-id)-6, 6);
306  passphrase_cb (void *hook, const char *uid_hint,      return buf;
307                 const char *passphrase_info,  }
308                 int prev_was_bad, int fd)  
309  {  
310      passphrase_cb_s *c = (passphrase_cb_s*)hook;  /* Passphrase callback with the ability to support caching. */
311      HANDLE hd = (HANDLE)fd;  gpgme_error_t
312      void *item;  passphrase_cb (void *hook, const char *uid_hint,
313      const char *keyid, *pass;                 const char *passphrase_info,
314      DWORD n;                 int prev_was_bad, int fd)
315      int rc;  {
316        passphrase_cb_s *c = (passphrase_cb_s*)hook;
317      if (!c)      HANDLE hd = (HANDLE)fd;
318          return gpg_error (GPG_ERR_INV_ARG);      void *item;
319      c->bad_pwd = prev_was_bad? 1 : 0;      const char *keyid, *pass;
320      if (prev_was_bad && !c->cancel) {      DWORD n;
321          if (c->pwd)      int rc;
322              burn_passphrase (&c->pwd);  
323          agent_del_cache (c->keyid);      if (!c)
324          c->pwd_init = 1;          return gpg_error (GPG_ERR_INV_ARG);
325      }      c->bad_pwd = prev_was_bad? 1 : 0;
326        if (prev_was_bad && !c->cancel) {
327      if (passphrase_info) {          if (c->pwd)
328          if (strlen (passphrase_info) < 16 &&              burn_passphrase (&c->pwd);
329              !strstr (passphrase_info, "OPENPGP")) {          agent_del_cache (c->keyid);
330              /* assume symetric encryption. */          c->pwd_init = 1;
331              int n=2;      }
332              c->sym.sym_algo = atoi (passphrase_info);  
333              if (c->sym.sym_algo > 9)      if (passphrase_info) {
334                  n++;          if (strlen (passphrase_info) < 16 &&
335              /* XXX: be more strict. */              !strstr (passphrase_info, "OPENPGP")) {
336              c->sym.s2k_mode = atoi (passphrase_info+n);              /* assume symetric encryption. */
337              c->sym.s2k_hash = atoi (passphrase_info+n+2);              int n=2;
338          }              c->sym.sym_algo = atoi (passphrase_info);
339                if (c->sym.sym_algo > 9)
340          keyid = parse_gpg_keyid (passphrase_info);                  n++;
341          pass = agent_get_cache (keyid+8, &item);              /* XXX: be more strict. */
342          if (pass) {              c->sym.s2k_mode = atoi (passphrase_info+n);
343              agent_unlock_cache_entry (&item);              c->sym.s2k_hash = atoi (passphrase_info+n+2);
344              c->pwd_init = 0;          }
345              if (!WriteFile (hd, pass, strlen (pass), &n, NULL))  
346                  log_debug ("passphrase_cb: WriteFile() failed ec=%d\n", w32_errno);          keyid = parse_gpg_keyid (passphrase_info);
347              if (!WriteFile (hd, "\n", 1, &n, NULL))          pass = agent_get_cache (keyid+8, &item);
348                  log_debug ("passphrase_cb: WriteFile() failed ec=%d\n", w32_errno);          if (pass) {
349              return 0;              agent_unlock_cache_entry (&item);
350          }              c->pwd_init = 0;
351      }              if (!WriteFile (hd, pass, strlen (pass), &n, NULL))
352                    log_debug ("passphrase_cb: WriteFile() failed ec=%d\n", w32_errno);
353      if (c->pwd_init) {              if (!WriteFile (hd, "\n", 1, &n, NULL))
354          if (keyid && strlen (keyid) == 16)                  log_debug ("passphrase_cb: WriteFile() failed ec=%d\n", w32_errno);
355              strcpy (c->keyid, keyid+8);              return 0;
356            }
357          /* if @passphrase_info contains 'OPENPGP' we assume a smart card      }
358              has been used. */  
359          if (strstr (passphrase_info, "OPENPGP")) {      if (c->pwd_init) {
360              const char *s=passphrase_info;          if (keyid && strlen (keyid) == 16)
361              while (s && *s && *s != 'D')              strcpy (c->keyid, keyid+8);
362                  s++;  
363              _snprintf (c->info, sizeof c->info-1,          /* if @passphrase_info contains 'OPENPGP' we assume a smart card
364                         _("Please enter the PIN to unlock your secret card key\n"              has been used. */
365                           "Card: %s"), extract_serial_no (s));          if (strstr (passphrase_info, "OPENPGP")) {
366              c->is_card = 1;              const char *s=passphrase_info;
367          }              while (s && *s && *s != 'D')
368          else if (uid_hint)                  s++;
369              parse_gpg_description (uid_hint, passphrase_info,              _snprintf (c->info, sizeof c->info-1,
370                                     c->info, sizeof c->info - 1);                         _("Please enter the PIN to unlock your secret card key\n"
371          if (c->gpg_cmd == GPG_CMD_DECRYPT) {                           "Card: %s"), extract_serial_no (s));
372              rc = DialogBoxParam (glob_hinst, (LPCSTR)IDD_WINPT_DECRYPT,              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          else if (c->gpg_cmd == GPG_CMD_SIGN) {                                     c->info, sizeof c->info - 1);
377              rc = DialogBoxParam (glob_hinst, (LPCSTR)IDD_WINPT_DECRYPT_SIGN,          if (c->gpg_cmd == GPG_CMD_DECRYPT) {
378                                   (HWND)c->hwnd, passphrase_callback_proc,              rc = DialogBoxParam (glob_hinst, (LPCSTR)IDD_WINPT_DECRYPT,
379                                   (LPARAM)c);                                   (HWND)c->hwnd, passphrase_callback_proc,
380          }                                   (LPARAM)c);
381          if (rc == -1) {          }
382              if (!WriteFile (hd, "\n", 1, &n, NULL))          else if (c->gpg_cmd == GPG_CMD_SIGN) {
383                  log_debug ("passphrase_cb: WriteFile() failed ec=%d\n", w32_errno);              rc = DialogBoxParam (glob_hinst, (LPCSTR)IDD_WINPT_DECRYPT_SIGN,
384              return 0;                                   (HWND)c->hwnd, passphrase_callback_proc,
385          }                                   (LPARAM)c);
386          c->pwd_init = 0;          }
387      }          if (rc == -1) {
388      if (c->cancel) {              if (!WriteFile (hd, "\n", 1, &n, NULL))
389          if (!WriteFile (hd, "\n", 1, &n, NULL))                  log_debug ("passphrase_cb: WriteFile() failed ec=%d\n", w32_errno);
390              log_debug ("passphrase_cb: WriteFile() failed ec=%d\n", w32_errno);              return 0;
391          return 0;          }
392      }          c->pwd_init = 0;
393        }
394      WriteFile (hd, c->pwd, strlen (c->pwd), &n, NULL);      if (c->cancel) {
395      WriteFile (hd, "\n", 1, &n, NULL);          if (!WriteFile (hd, "\n", 1, &n, NULL))
396      return 0;              log_debug ("passphrase_cb: WriteFile() failed ec=%d\n", w32_errno);
397  }          return 0;
398        }
399    
400  /* Initialize the given passphrase callback @cb with the      WriteFile (hd, c->pwd, strlen (c->pwd), &n, NULL);
401     used gpgme context @ctx, the command @cmd and a title      WriteFile (hd, "\n", 1, &n, NULL);
402     @title for the dialog. */      return 0;
403  void  }
404  set_gpg_passphrase_cb (passphrase_cb_s *cb, gpgme_ctx_t ctx,  
405                         int cmd, HWND hwnd, const char *title)  
406  {  /* Initialize the given passphrase callback @cb with the
407      memset (cb, 0, sizeof *cb);     used gpgme context @ctx, the command @cmd and a title
408      cb->gpg_cmd = cmd;     @title for the dialog. */
409      cb->bad_pwd = 0;  void
410      cb->is_card = 0;  set_gpg_passphrase_cb (passphrase_cb_s *cb, gpgme_ctx_t ctx,
411      cb->cancel = 0;                         int cmd, HWND hwnd, const char *title)
412      cb->hwnd = hwnd;  {
413      cb->pwd_init = 1;      memset (cb, 0, sizeof *cb);
414      free_if_alloc (cb->title);      cb->gpg_cmd = cmd;
415      cb->title = m_strdup (title);      cb->bad_pwd = 0;
416      if (!cb->title)      cb->is_card = 0;
417          BUG (NULL);      cb->cancel = 0;
418      gpgme_set_passphrase_cb (ctx, passphrase_cb, cb);      cb->hwnd = hwnd;
419      cb->gpg = ctx;      cb->pwd_init = 1;
420  }      free_if_alloc (cb->title);
421        cb->title = m_strdup (title);
422        if (!cb->title)
423  /* Release a passphrase callback @ctx. */          BUG (NULL);
424  void      gpgme_set_passphrase_cb (ctx, passphrase_cb, cb);
425  release_gpg_passphrase_cb (passphrase_cb_s *ctx)      cb->gpg = ctx;
426  {  }
427      gpgme_recipient_t r, n;  
428    
429      if (!ctx)  /* Release a passphrase callback @ctx. */
430          return;  void
431      sfree_if_alloc (ctx->pwd);  release_gpg_passphrase_cb (passphrase_cb_s *ctx)
432      free_if_alloc (ctx->title);  {
433      r = ctx->recipients;      gpgme_recipient_t r, n;
434      while (r) {  
435          n = r->next;      if (!ctx)
436          safe_free (r->keyid);          return;
437          safe_free (r);      sfree_if_alloc (ctx->pwd);
438          r = n;      free_if_alloc (ctx->title);
439      }      r = ctx->recipients;
440  }      while (r) {
441            n = r->next;
442            safe_free (r->keyid);
443  /* Simple check to measure passphrase (@pass) quality.          safe_free (r);
444     Return value: 0 on success. */          r = n;
445  int      }
446  check_passwd_quality (const char *pass, int strict)  }
447  {  
448      int i, nd=0, nc=0, n;  
449    /* Simple check to measure passphrase (@pass) quality.
450      n = strlen (pass);     Return value: 0 on success. */
451      if (n < 8)  int
452          return -1;  check_passwd_quality (const char *pass, int strict)
453    {
454      for (i=0; i < n; i++) {      int i, nd=0, nc=0, n;
455          if (isdigit (pass[i]))  
456              nd++;      n = strlen (pass);
457          if (isalpha (pass[i]))      if (n < 8)
458              nc++;          return -1;
459      }  
460        for (i=0; i < n; i++) {
461      /* check that the passphrase contains letters and numbers. */          if (isdigit (pass[i]))
462      if (nd == n || nc == n)              nd++;
463          return -1;          if (isalpha (pass[i]))
464                nc++;
465      return 0;      }
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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