/[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 229 by twoaday, Mon Jun 19 14:04:31 2006 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, 2006 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 "wptErrors.h"
38  #include "wptRegistry.h"  #include "wptTypes.h"
39    #include "wptKeylist.h"
40  const char* get_symkey_algo (int algo);  #include "wptAgent.h"
41    #include "wptRegistry.h"
42  #define item_ctrl_id( cmd ) \  #include "wptUTF8.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;  void ListBox_AddString_utf8 (HWND lb, const char *txt);
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=NULL;
72        gpgme_sign_result_t res_sig=NULL;
73      switch (msg) {      gpgme_recipient_t recip=NULL, r;
74      case WM_INITDIALOG:      winpt_key_s key;
75          c = (passphrase_cb_s *)lparam;      void *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_ACTIVATE:
82              CheckDlgButton (dlg, IDC_DECRYPT_HIDE, BST_CHECKED);          safe_edit_control_init (dlg, item_ctrl_id (c->gpg_cmd));
83          }          break;
84          else if (c->gpg_cmd == GPG_CMD_SIGN)  
85              CheckDlgButton (dlg, IDC_DECRYPT_SIGN_HIDE, BST_CHECKED);      case WM_DESTROY:
86          res = gpgme_op_decrypt_result (c->gpg);          safe_edit_control_free (dlg, item_ctrl_id (c->gpg_cmd));
87          if (res != NULL && c->gpg_cmd == GPG_CMD_DECRYPT) {          break;
88              gpgme_recipient_t r;  
89        case WM_INITDIALOG:
90              /* XXX: not all ENCRYPT_TO entries are listed here. */          c = (passphrase_cb_s *)lparam;
91              for (r = res->recipients; r; r = r->next) {          if (!c)
92                  get_pubkey (r->keyid, &key);              BUG (0);
93                  if (key) {          SetDlgItemText (dlg, IDCANCEL, _("&Cancel"));
94                      char *uid;          SetWindowText (dlg, c->title);
95                      id = key->uids->name;          if (c->gpg_cmd == GPG_CMD_DECRYPT) {
96                      if (!id)              SetDlgItemText (dlg, IDC_DECRYPT_HIDE, _("&Hide Typing"));
97                          id = _("Invalid User ID");              SetDlgItemText (dlg, IDC_DECRYPT_LISTINF,
98                      uid = utf8_to_wincp (id, strlen (id));                              _("Encrypted with the following public key(s)"));
99                      info = new char [32+strlen (uid)+1 + 4 + strlen (r->keyid)+1              CheckDlgButton (dlg, IDC_DECRYPT_HIDE, BST_CHECKED);
100                                       + strlen (key->uids->email)+1];          }
101                      if (!info)          else if (c->gpg_cmd == GPG_CMD_SIGN) {
102                          BUG (NULL);              SetDlgItemText (dlg, IDC_DECRYPT_SIGN_HIDE, _("&Hide Typing"));
103                      sprintf (info, "%s <%s> (%s, 0x%s)", uid, key->uids->email,              CheckDlgButton (dlg, IDC_DECRYPT_SIGN_HIDE, BST_CHECKED);
104                               get_key_pubalgo (r->pubkey_algo), r->keyid+8);          }
105                      free (uid);          /* Because it depends on the order the keys are stored in the
106                                   keyring whether res->recipients is complete or not, we also
107                  }             support that the recipients were externally extracted and then
108                  else {             we use this list. */
109                      info = new char [32 + strlen (r->keyid)+1 + 4];          if (c->recipients)
110                      if (!info)              recip = c->recipients; /* recipients were already extracted. */
111                          BUG (NULL);          else {
112                      sprintf (info, _("Unknown key ID (%s, 0x%s)"),              res = gpgme_op_decrypt_result (c->gpg);
113                               get_key_pubalgo (r->pubkey_algo), r->keyid+8);              if (res && res->recipients)
114                  }                  recip = res->recipients;
115                  listbox_add_string (GetDlgItem (dlg, IDC_DECRYPT_LIST), info);          }
116                  free_if_alloc (info);          if (recip != NULL && c->gpg_cmd == GPG_CMD_DECRYPT) {
117              }              for (r = recip; r; r = r->next) {
118          }                  memset (&key, 0, sizeof (key));
119          else if (c->gpg_cmd == GPG_CMD_DECRYPT)                  if (!winpt_get_pubkey (r->keyid, &key)) {
120              EnableWindow (GetDlgItem (dlg, IDC_DECRYPT_LIST), FALSE);                      gpgme_user_id_t u = key.ctx->uids;
121          SetDlgItemText (dlg, c->gpg_cmd == GPG_CMD_DECRYPT?  
122                          IDC_DECRYPT_PWDINFO : IDC_DECRYPT_SIGN_PWDINFO,                      id = u->name;
123                          c->bad_pwd? _("Bad passphrase; Enter passphrase again") :                      if (!id)
124                          _("Please enter your passphrase"));                          id = _("Invalid User ID");
125          if (c->gpg_cmd == GPG_CMD_DECRYPT) {                      n = 32+strlen (id)+1+4+strlen (r->keyid)+1;
126              SetFocus (GetDlgItem (dlg, IDC_DECRYPT_PWD));                      if (u->email)
127              if (res && !res->recipients) {                          n += strlen (u->email)+1;
128                  const char *s = _("Symmetric encryption.\n"                      info = new char [n+1];
129                                    "%s encrypted data.");                      if (!info)
130                  const char *alg = get_symkey_algo (c->sym.sym_algo);                          BUG (NULL);
131                  info = new char[strlen (s) + strlen (alg) + 2];                      if (!u->email || strlen (u->email) < 1)
132                  if (!info)                          sprintf (info, "%s (%s, 0x%s)", id,
133                      BUG (NULL);                                   get_key_pubalgo (r->pubkey_algo), r->keyid+8);
134                  sprintf (info, s, alg);                      else
135                  SetDlgItemText (dlg, IDC_DECRYPT_MSG, info);                          sprintf (info, "%s <%s> (%s, 0x%s)", id, u->email,
136                  free_if_alloc (info);                                   get_key_pubalgo (r->pubkey_algo), r->keyid+8);
137              }                  }
138              else                  else {
139                  SetDlgItemText (dlg, IDC_DECRYPT_MSG, c->info);                      info = new char [32 + strlen (r->keyid)+1 + 4];
140          }                      if (!info)
141          else {                          BUG (NULL);
142              SetFocus( GetDlgItem (dlg, IDC_DECRYPT_SIGN_PWD));                      sprintf (info, _("Unknown key ID (%s, 0x%s)"),
143              SetDlgItemText (dlg, IDC_DECRYPT_SIGN_MSG, c->info);                               get_key_pubalgo (r->pubkey_algo), r->keyid+8);
144          }                  }
145          center_window (dlg, NULL);                  ListBox_AddString_utf8 (GetDlgItem (dlg, IDC_DECRYPT_LIST), info);
146          SetForegroundWindow (dlg);                  free_if_alloc (info);
147          set_active_window (dlg);                  winpt_release_pubkey (&key);
148          return FALSE;              }
149            }
150          case WM_SYSCOMMAND:          else if (c->gpg_cmd == GPG_CMD_DECRYPT)
151              if (LOWORD (wparam) == SC_CLOSE) {              EnableWindow (GetDlgItem (dlg, IDC_DECRYPT_LIST), FALSE);
152                  SetDlgItemText (dlg, item_ctrl_id (c->gpg_cmd), "");          SetDlgItemText (dlg, c->gpg_cmd == GPG_CMD_DECRYPT?
153                  c->cancel = 1;                          IDC_DECRYPT_PWDINFO : IDC_DECRYPT_SIGN_PWDINFO,
154                  EndDialog (dlg, TRUE);                          c->bad_pwd? _("Bad passphrase; Enter passphrase again") :
155              }                          _("Please enter your passphrase"));
156              break;          if (c->gpg_cmd == GPG_CMD_DECRYPT) {
157                SetFocus (GetDlgItem (dlg, IDC_DECRYPT_PWD));
158          case WM_COMMAND:              if (res && !res->recipients) {
159              switch (HIWORD (wparam)) {                  const char *s = _("Symmetric encryption.\n"
160              case BN_CLICKED:                                    "%s encrypted data.");
161                  if  (LOWORD (wparam) == IDC_DECRYPT_HIDE                  const char *alg = get_symkey_algo (c->sym.sym_algo);
162                      || LOWORD (wparam) == IDC_DECRYPT_SIGN_HIDE) {                  info = new char[strlen (s) + strlen (alg) + 2];
163                      HWND hwnd;                  if (!info)
164                      int hide = IsDlgButtonChecked (dlg, item_ctrl_id2 (c->gpg_cmd));                      BUG (NULL);
165                      hwnd = GetDlgItem (dlg, item_ctrl_id (c->gpg_cmd));                  sprintf (info, s, alg);
166                      SendMessage (hwnd, EM_SETPASSWORDCHAR, hide? '*' : 0, 0);                  SetDlgItemText (dlg, IDC_DECRYPT_MSG, info);
167                      SetFocus (hwnd);                  free_if_alloc (info);
168                  }              }
169              }              else
170                    SetDlgItemText (dlg, IDC_DECRYPT_MSG, c->info);
171              switch (LOWORD (wparam)) {          }
172              case IDOK:            else {
173                  /* XXX: the item is even cached when the passphrase is not              SetFocus (GetDlgItem (dlg, IDC_DECRYPT_SIGN_PWD));
174                          correct, which means that the user needs to delete all              SetDlgItemText (dlg, IDC_DECRYPT_SIGN_MSG, c->info);
175                          cached entries to continue. */          }
176                  if (c->pwd)          center_window (dlg, NULL);
177                      burn_passphrase (&c->pwd);          SetForegroundWindow (dlg);
178                  n = item_get_text_length (dlg, item_ctrl_id (c->gpg_cmd));          return FALSE;
179                  if (!n) {  
180                      c->pwd = new char[2];          case WM_SYSCOMMAND:
181                      if (!c->pwd)              if (LOWORD (wparam) == SC_CLOSE) {
182                          BUG (NULL);                  SetDlgItemText (dlg, item_ctrl_id (c->gpg_cmd), "");
183                      strcpy (c->pwd, "");                  c->cancel = 1;
184                  }                  EndDialog (dlg, TRUE);
185                  else {              }
186                      c->pwd = new char[n+2];              break;
187                      if (!c->pwd)  
188                          BUG (NULL);          case WM_COMMAND:
189                      GetDlgItemText (dlg, item_ctrl_id (c->gpg_cmd), c->pwd, n+1);              switch (HIWORD (wparam)) {
190                  }              case BN_CLICKED:
191                  res = gpgme_op_decrypt_result (c->gpg);                  if  (LOWORD (wparam) == IDC_DECRYPT_HIDE
192                  if (!res)                      || LOWORD (wparam) == IDC_DECRYPT_SIGN_HIDE) {
193                      res_sig = gpgme_op_sign_result (c->gpg);                      HWND hwnd;
194                  if (reg_prefs.cache_time > 0 && !c->is_card &&                      int hide = IsDlgButtonChecked (dlg, item_ctrl_id2 (c->gpg_cmd));
195                      ((res && res->recipients) || (res_sig && res_sig->signatures))) {                      hwnd = GetDlgItem (dlg, item_ctrl_id (c->gpg_cmd));
196                      if (agent_get_cache (c->keyid, &item))                      SendMessage (hwnd, EM_SETPASSWORDCHAR, hide? '*' : 0, 0);
197                          agent_unlock_cache_entry (&item);                      SetFocus (hwnd);
198                      else                  }
199                          agent_put_cache (c->keyid, c->pwd, reg_prefs.cache_time);              }
200                  }  
201                  c->cancel = 0;              switch (LOWORD (wparam)) {
202                  EndDialog (dlg, TRUE);              case IDOK:  
203                  return TRUE;                  /* XXX: the item is even cached when the passphrase is not
204                                            correct, which means that the user needs to delete all
205              case IDCANCEL:                          cached entries to continue. */
206                  SetDlgItemText (dlg, item_ctrl_id (c->gpg_cmd), "");                  if (c->pwd)
207                  c->cancel = 1;                      burn_passphrase (&c->pwd);
208                  EndDialog (dlg, FALSE);                  n = item_get_text_length (dlg, item_ctrl_id (c->gpg_cmd));
209                  return FALSE;                  if (!n) {
210              }                      c->pwd = new char[2];
211              break;                      if (!c->pwd)
212      }                          BUG (NULL);
213                            strcpy (c->pwd, "");
214      return FALSE;                  }
215  }                  else {
216                        char *p = new char[n+2];
217                        if (!p)
218  /* Extract the main keyid from @pass_info.                          BUG (NULL);
219     Return value: long main keyid or NULL for an error. */                      /* Get the passphrase and convert it utf8.
220  static const char*                         This does not just the us-ascii charset. */
221  parse_gpg_keyid (const char *pass_info)                      SafeGetDlgItemText (dlg, item_ctrl_id (c->gpg_cmd), p, n+1);
222  {                      c->pwd = native_to_utf8 (p);
223      static char keyid[16+1];                      sfree_if_alloc (p);
224                        }
225      /* XXX: check for leading alpha-chars? */                  res = gpgme_op_decrypt_result (c->gpg);
226      if (strlen (pass_info) < 16)                  if (!res)
227          return NULL;                      res_sig = gpgme_op_sign_result (c->gpg);            
228      /* the format of the desc buffer looks like this:                  if (reg_prefs.cache_time > 0 && !c->is_card &&
229         request_keyid[16] main_keyid[16] keytype[1] keylength[4]                      (res || res_sig)) {
230         we use the main keyid to use only one cache entry. */                      if (agent_get_cache (c->keyid, &item))                      
231      strncpy (keyid, pass_info+17, 16);                          agent_unlock_cache_entry (&item);
232      keyid[16] = 0;                      else
233      return keyid;                          agent_put_cache (c->keyid, c->pwd, reg_prefs.cache_time);
234  }                  }
235                    c->cancel = 0;
236                    EndDialog (dlg, TRUE);
237  /* Parse the information in @uid_hint and @pass_info to generate                  return TRUE;
238     a input message for the user in @desc. */                  
239  static int              case IDCANCEL:
240  parse_gpg_description (const char *uid_hint, const char *pass_info,                  SetDlgItemText (dlg, item_ctrl_id (c->gpg_cmd), "");
241                         char *desc, int size)                  c->cancel = 1;
242  {                  EndDialog (dlg, FALSE);
243      gpgme_pubkey_algo_t algo;                  return FALSE;
244      char usedkey[16+1];              }
245      char mainkey[16+1];              break;
246      char *uid, *p;      }
247      int n=0;      
248        return FALSE;
249      /* Each uid_hint contains a long key-ID so it is at least 16 bytes. */  }
250      if (strlen (uid_hint) < 17) {  
251          *desc = 0;  
252          return -1;  /* Extract the main keyid from @pass_info.
253      }     Return value: long main keyid or NULL for an error. */
254    static const char*
255      while (p = strsep ((char**)&pass_info, " ")) {  parse_gpg_keyid (const char *pass_info)
256          switch (n++) {  {
257          case 0: strncpy (mainkey, p, 16); mainkey[16] = 0; break;      static char keyid[16+1];
258          case 1: strncpy (usedkey, p, 16); usedkey[16] = 0; break;      
259          case 2: algo = (gpgme_pubkey_algo_t)atol (p); break;      /* XXX: check for leading alpha-chars? */
260          }      if (strlen (pass_info) < 16) {
261      }          log_debug ("parse_gpg_keyid: error '%s'\r\n", pass_info);
262      uid_hint += 16; /* skip keyid */          return NULL;
263      uid_hint += 1;  /* space */      }
264        /* the format of the desc buffer looks like this:
265      uid = utf8_to_wincp (uid_hint, strlen (uid_hint));         request_keyid[16] main_keyid[16] keytype[1] keylength[4]
266           we use the main keyid to use only one cache entry. */
267      if (strcmp (usedkey, mainkey))      strncpy (keyid, pass_info+17, 16);
268          _snprintf (desc, size-1,      keyid[16] = 0;
269                     _("You need a passphrase to unlock the secret key for\n"      return keyid;
270                       "user: \"%s\"\n"  }
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))  /* Parse the information in @uid_hint and @pass_info to generate
274          _snprintf (desc, size-1,     a input message for the user in @desc. */
275                     _("You need a passphrase to unlock the secret key for\n"  static int
276                       "user: \"%s\"\n"  parse_gpg_description (const char *uid_hint, const char *pass_info,
277                       "%s key, ID %s\n"),                         char *desc, int size)
278                       uid, get_key_pubalgo (algo), usedkey+8);  {
279      free (uid);      gpgme_pubkey_algo_t algo;
280      return 0;      char usedkey[16+1];
281  }      char mainkey[16+1];
282        char *p, *uid;
283        int n=0;
284  /* Extract the serial number from the card ID @id and return it. */  
285  const char*      algo = (gpgme_pubkey_algo_t)0;
286  extract_serial_no (const char *id)      /* Each uid_hint contains a long key-ID so it is at least 16 bytes. */
287  {      if (strlen (uid_hint) < 17) {
288      static char buf[8];          *desc = 0;
289      char *p;          log_debug ("parse_gpg_description: error '%s'\r\n", uid_hint);
290            return -1;
291      p = strchr (id, '/');      }
292      if (!p)  
293          return NULL;      while (p = strsep ((char**)&pass_info, " ")) {
294      strncpy (buf, id+(p-id)-6, 6);          switch (n++) {
295      return buf;          case 0: strncpy (mainkey, p, 16); mainkey[16] = 0; break;
296  }          case 1: strncpy (usedkey, p, 16); usedkey[16] = 0; break;
297            case 2: algo = (gpgme_pubkey_algo_t)atol (p); break;
298            }
299  /* Passphrase callback with the ability to support caching. */      }
300  gpgme_error_t      uid_hint += 16; /* skip keyid */
301  passphrase_cb (void *hook, const char *uid_hint,      uid_hint += 1;  /* space */
302                 const char *passphrase_info,  
303                 int prev_was_bad, int fd)      uid = utf8_to_native (uid_hint);
304  {      if (strcmp (usedkey, mainkey))
305      passphrase_cb_s *c = (passphrase_cb_s*)hook;          _snprintf (desc, size-1,
306      HANDLE hd = (HANDLE)fd;                     _("You need a passphrase to unlock the secret key for\n"
307      void *item;                       "user: \"%s\"\n"
308      const char *keyid, *pass;                       "%s key, ID %s (main key ID %s)\n"),
309      DWORD n;                     uid, get_key_pubalgo (algo), usedkey+8, mainkey+8);
310      int rc;      else if (!strcmp (usedkey, mainkey))
311            _snprintf (desc, size-1,
312      if (!c)                     _("You need a passphrase to unlock the secret key for\n"
313          return gpg_error (GPG_ERR_INV_ARG);                       "user: \"%s\"\n"
314      c->bad_pwd = prev_was_bad? 1 : 0;                       "%s key, ID %s\n"),
315      if (prev_was_bad && !c->cancel) {                       uid, get_key_pubalgo (algo), usedkey+8);
316          if (c->pwd)      safe_free (uid);
317              burn_passphrase (&c->pwd);      return 0;
318          agent_del_cache (c->keyid);  }
319          c->pwd_init = 1;  
320      }  
321    /* Extract the serial number from the card ID @id and return it. */
322      if (passphrase_info) {  const char*
323          if (strlen (passphrase_info) < 16 &&  extract_serial_no (const char *id)
324              !strstr (passphrase_info, "OPENPGP")) {  {
325              /* assume symetric encryption. */      static char buf[8];
326              int n=2;      char *p;
327              c->sym.sym_algo = atoi (passphrase_info);  
328              if (c->sym.sym_algo > 9)      p = strchr (id, '/');
329                  n++;      if (!p) {
330              /* XXX: be more strict. */          log_debug ("extract_serial_no: error '%s'\r\n", id);
331              c->sym.s2k_mode = atoi (passphrase_info+n);          return NULL;
332              c->sym.s2k_hash = atoi (passphrase_info+n+2);      }
333          }      strncpy (buf, id+(p-id)-6, 6);
334        return buf;
335          keyid = parse_gpg_keyid (passphrase_info);  }
336          pass = agent_get_cache (keyid+8, &item);  
337          if (pass) {  
338              agent_unlock_cache_entry (&item);  /* Passphrase callback with the ability to support caching. */
339              c->pwd_init = 0;  gpgme_error_t
340              if (!WriteFile (hd, pass, strlen (pass), &n, NULL))  passphrase_cb (void *hook, const char *uid_hint,
341                  log_debug ("passphrase_cb: WriteFile() failed ec=%d\n", w32_errno);                 const char *passphrase_info,
342              if (!WriteFile (hd, "\n", 1, &n, NULL))                 int prev_was_bad, int fd)
343                  log_debug ("passphrase_cb: WriteFile() failed ec=%d\n", w32_errno);  {
344              return 0;      passphrase_cb_s *c = (passphrase_cb_s*)hook;
345          }      HANDLE hd = (HANDLE)fd;
346      }      void *item;
347        const char *keyid=NULL, *pass;
348      if (c->pwd_init) {      DWORD n;
349          if (keyid && strlen (keyid) == 16)      int rc = 0;
350              strcpy (c->keyid, keyid+8);  
351        if (!c) {
352          /* if @passphrase_info contains 'OPENPGP' we assume a smart card          log_debug ("passphrase_cb: error '!c'\r\n");
353              has been used. */          return gpg_error (GPG_ERR_INV_ARG);
354          if (strstr (passphrase_info, "OPENPGP")) {      }
355              const char *s=passphrase_info;      c->bad_pwd = prev_was_bad? 1 : 0;
356              while (s && *s && *s != 'D')      if (prev_was_bad && !c->cancel) {
357                  s++;          if (c->pwd)
358              _snprintf (c->info, sizeof c->info-1,              burn_passphrase (&c->pwd);
359                         _("Please enter the PIN to unlock your secret card key\n"          agent_del_cache (c->keyid);
360                           "Card: %s"), extract_serial_no (s));          c->pwd_init = 1;
361              c->is_card = 1;      }
362          }  
363          else if (uid_hint)      if (passphrase_info) {
364              parse_gpg_description (uid_hint, passphrase_info,          if (strlen (passphrase_info) < 16 &&
365                                     c->info, sizeof c->info - 1);              !strstr (passphrase_info, "OPENPGP")) {
366          if (c->gpg_cmd == GPG_CMD_DECRYPT) {              /* assume symetric encryption. */
367              rc = DialogBoxParam (glob_hinst, (LPCSTR)IDD_WINPT_DECRYPT,              int pos=2;
368                                   (HWND)c->hwnd, passphrase_callback_proc,              c->sym.sym_algo = atoi (passphrase_info);
369                                   (LPARAM)c);              if (c->sym.sym_algo > 9)
370          }                  pos++;
371          else if (c->gpg_cmd == GPG_CMD_SIGN) {              /* XXX: be more strict. */
372              rc = DialogBoxParam (glob_hinst, (LPCSTR)IDD_WINPT_DECRYPT_SIGN,              c->sym.s2k_mode = atoi (passphrase_info+pos);
373                                   (HWND)c->hwnd, passphrase_callback_proc,              c->sym.s2k_hash = atoi (passphrase_info+pos+2);
374                                   (LPARAM)c);          }
375          }  
376          if (rc == -1) {          keyid = parse_gpg_keyid (passphrase_info);
377              if (!WriteFile (hd, "\n", 1, &n, NULL))          pass = agent_get_cache (keyid+8, &item);        
378                  log_debug ("passphrase_cb: WriteFile() failed ec=%d\n", w32_errno);          if (pass) {
379              return 0;              agent_unlock_cache_entry (&item);
380          }              c->pwd_init = 0;
381          c->pwd_init = 0;              if (!WriteFile (hd, pass, strlen (pass), &n, NULL))
382      }                  log_debug ("passphrase_cb: WriteFile() failed ec=%d\n", w32_errno);
383      if (c->cancel) {              if (!WriteFile (hd, "\n", 1, &n, NULL))
384          if (!WriteFile (hd, "\n", 1, &n, NULL))                  log_debug ("passphrase_cb: WriteFile() failed ec=%d\n", w32_errno);
385              log_debug ("passphrase_cb: WriteFile() failed ec=%d\n", w32_errno);              return 0;
386          return 0;          }
387      }      }
388    
389      WriteFile (hd, c->pwd, strlen (c->pwd), &n, NULL);      if (c->pwd_init) {
390      WriteFile (hd, "\n", 1, &n, NULL);          if (keyid && strlen (keyid) == 16)
391      return 0;              strcpy (c->keyid, keyid+8);
392  }  
393            /* if @passphrase_info contains 'OPENPGP' we assume a smart card
394                has been used. */
395  /* Initialize the given passphrase callback @cb with the          if (strstr (passphrase_info, "OPENPGP")) {
396     used gpgme context @ctx, the command @cmd and a title              const char *s=passphrase_info;
397     @title for the dialog. */              while (s && *s && *s != 'D')
398  void                  s++;
399  set_gpg_passphrase_cb (passphrase_cb_s *cb, gpgme_ctx_t ctx,              _snprintf (c->info, sizeof c->info-1,
400                         int cmd, HWND hwnd, const char *title)                         _("Please enter the PIN to unlock your secret card key\n"
401  {                           "Card: %s"), extract_serial_no (s));
402      memset (cb, 0, sizeof *cb);              c->is_card = 1;
403      cb->gpg_cmd = cmd;          }
404      cb->bad_pwd = 0;          else if (uid_hint)
405      cb->is_card = 0;              parse_gpg_description (uid_hint, passphrase_info,
406      cb->cancel = 0;                                     c->info, sizeof (c->info) - 1);
407      cb->hwnd = hwnd;          if (c->gpg_cmd == GPG_CMD_DECRYPT) {
408      cb->pwd_init = 1;              rc = DialogBoxParam (glob_hinst, (LPCSTR)IDD_WINPT_DECRYPT,
409      free_if_alloc (cb->title);                                   (HWND)c->hwnd, passphrase_callback_proc,
410      cb->title = m_strdup (title);                                   (LPARAM)c);
411      if (!cb->title)          }
412          BUG (NULL);          else if (c->gpg_cmd == GPG_CMD_SIGN) {
413      gpgme_set_passphrase_cb (ctx, passphrase_cb, cb);              rc = DialogBoxParam (glob_hinst, (LPCSTR)IDD_WINPT_DECRYPT_SIGN,
414      cb->gpg = ctx;                                   (HWND)c->hwnd, passphrase_callback_proc,
415  }                                   (LPARAM)c);
416            }
417            if (rc == -1) {
418  /* Release a passphrase callback @ctx. */              if (!WriteFile (hd, "\n", 1, &n, NULL))
419  void                  log_debug ("passphrase_cb: WriteFile() failed ec=%d\n", w32_errno);
420  release_gpg_passphrase_cb (passphrase_cb_s *ctx)              return 0;
421  {          }
422      if (!ctx)          c->pwd_init = 0;
423          return;      }
424      sfree_if_alloc (ctx->pwd);      if (c->cancel || !c->pwd) {
425      free_if_alloc (ctx->title);          if (!WriteFile (hd, "\n", 1, &n, NULL))
426  }              log_debug ("passphrase_cb: WriteFile() failed ec=%d\n", w32_errno);
427            return 0;
428        }
429  /* Simple check to measure passphrase (@pass) quality.  
430     Return value: 0 on success. */      if (!WriteFile (hd, c->pwd, strlen (c->pwd), &n, NULL))
431  int          log_debug ("passphrase_cb: WriteFile() failed ec=%d\n", w32_errno);
432  check_passwd_quality (const char *pass, int strict)      if (!WriteFile (hd, "\n", 1, &n, NULL))
433  {          log_debug ("passphrase_cb: WriteFile() failed ec=%d\n", w32_errno);
434      int i, nd=0, nc=0, n;      return 0;
435    }
436      n = strlen (pass);  
437      if (n < 8)  
438          return -1;  /* Initialize the given passphrase callback @cb with the
439       used gpgme context @ctx, the command @cmd and a title
440      for (i=0; i < n; i++) {     @title for the dialog. */
441          if (isdigit (pass[i]))  void
442              nd++;  set_gpg_passphrase_cb (passphrase_cb_s *cb, gpgme_ctx_t ctx,
443          if (isalpha (pass[i]))                         int cmd, HWND hwnd, const char *title)
444              nc++;  {
445      }      memset (cb, 0, sizeof *cb);
446        cb->gpg_cmd = cmd;
447      /* check that the passphrase contains letters and numbers. */      cb->bad_pwd = 0;
448      if (nd == n || nc == n)      cb->is_card = 0;
449          return -1;      cb->cancel = 0;
450        cb->hwnd = hwnd;
451      return 0;      cb->pwd_init = 1;
452  }      free_if_alloc (cb->title);
453        cb->title = m_strdup (title);
454        gpgme_set_passphrase_cb (ctx, passphrase_cb, cb);
455        cb->gpg = ctx;
456    }
457    
458    
459    /* Release the gpg recipient list. */
460    void
461    release_gpg_recipients (gpgme_recipient_t *recipients)
462    {
463        gpgme_recipient_t r, n;
464    
465        r = *recipients;
466        while (r != NULL) {
467            n = r->next;
468            safe_free (r->keyid);
469            safe_free (r);
470            r = n;
471        }
472        *recipients = NULL;
473    }
474    
475    
476    
477    /* Release a passphrase callback @ctx. */
478    void
479    release_gpg_passphrase_cb (passphrase_cb_s *ctx)
480    {
481        if (!ctx)
482            return;
483        sfree_if_alloc (ctx->pwd);
484        free_if_alloc (ctx->title);
485        release_gpg_recipients (&ctx->recipients);
486    }
487    
488    
489    /* Simple check to measure passphrase (@pass) quality.
490       Return value: 0 on success. */
491    int
492    check_passwd_quality (const char *pass, int strict)
493    {
494        int i, nd=0, nc=0, n;
495    
496        n = strlen (pass);
497        if (n < 8)
498            return -1;
499    
500        for (i=0; i < n; i++) {
501            if (isdigit (pass[i]))
502                nd++;
503            if (isalpha (pass[i]))
504                nc++;
505        }
506    
507        /* check that the passphrase contains letters and numbers. */
508        if (nd == n || nc == n)
509            return -1;
510    
511        return 0;
512    }
Legend:
Removed from v.32  
changed lines
  Added in v.229
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