/[winpt]/trunk/Src/wptPassphraseCB.cpp
ViewVC logotype

Diff of /trunk/Src/wptPassphraseCB.cpp

Parent Directory Parent Directory | Revision Log Revision Log | View Patch Patch

revision 4 by twoaday, Sun Feb 6 11:11:40 2005 UTC revision 85 by twoaday, Fri Nov 18 07:20:40 2005 UTC
# Line 1  Line 1 
1  /* wptPassphraseCB.cpp - GPGME Passphrase Callback  /* wptPassphraseCB.cpp - GPGME Passphrase Callback
2   *      Copyright (C) 2001, 2002, 2003 Timo Schulz   *      Copyright (C) 2001, 2002, 2003, 2005 Timo Schulz
3   *   *      Copyright (C) 2005 g10 Code GmbH
4   * This file is part of WinPT.   *
5   *   * This file is part of WinPT.
6   * WinPT is free software; you can redistribute it and/or   *
7   * modify it under the terms of the GNU General Public License   * WinPT is free software; you can redistribute it and/or
8   * as published by the Free Software Foundation; either version 2   * modify it under the terms of the GNU General Public License
9   * of the License, or (at your option) any later version.   * as published by the Free Software Foundation; either version 2
10   *     * of the License, or (at your option) any later version.
11   * WinPT is distributed in the hope that it will be useful,   *  
12   * but WITHOUT ANY WARRANTY; without even the implied warranty of   * WinPT is distributed in the hope that it will be useful,
13   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU   * but WITHOUT ANY WARRANTY; without even the implied warranty of
14   * General Public License for more details.   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15   *   * General Public License for more details.
16   * You should have received a copy of the GNU General Public License   *
17   * along with WinPT; if not, write to the Free Software Foundation,   * You should have received a copy of the GNU General Public License
18   * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA   * along with WinPT; if not, write to the Free Software Foundation,
19   */   * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20     */
21  #include <windows.h>  
22  #include <ctype.h>  #ifdef HAVE_CONFIG_H
23    #include <config.h>
24  #include "../resource.h"  #endif
25  #include "wptNLS.h"  
26  #include "wptW32API.h"  #include <windows.h>
27  #include "wptVersion.h"  #include <ctype.h>
28  #include "wptGPG.h"  
29  #include "wptCommonCtl.h"  #include "resource.h"
30  #include "wptContext.h"  #include "wptNLS.h"
31  #include "wptDlgs.h"  #include "wptW32API.h"
32  #include "wptUTF8.h"  #include "wptVersion.h"
33  #include "wptErrors.h"  #include "wptGPG.h"
34  #include "wptTypes.h"  #include "wptCommonCtl.h"
35  #include "wptAgent.h"  #include "wptContext.h"
36  #include "wptRegistry.h"  #include "wptDlgs.h"
37    #include "wptUTF8.h"
38    #include "wptErrors.h"
39  #define item_ctrl_id( cmd ) \  #include "wptTypes.h"
40      ((cmd) == GPG_CMD_DECRYPT? IDC_DECRYPT_PWD : IDC_DECRYPT_SIGN_PWD)  #include "wptKeylist.h"
41    #include "wptAgent.h"
42    #include "wptRegistry.h"
43  BOOL CALLBACK  
44  passphrase_callback_proc (HWND dlg, UINT msg, WPARAM wparam, LPARAM lparam)  const char* get_symkey_algo (int algo);
45  {      
46      static passphrase_cb_s * c;  #define item_ctrl_id( cmd ) \
47      static int hide = 1;      ((cmd) == GPG_CMD_DECRYPT? IDC_DECRYPT_PWD : IDC_DECRYPT_SIGN_PWD)
48      gpgme_key_t key;  
49      const char * s, * id;  #define item_ctrl_id2(cmd) \
50      char info[768] = {0};      ((cmd) == GPG_CMD_DECRYPT? IDC_DECRYPT_HIDE : IDC_DECRYPT_SIGN_HIDE)
51      void * ctx = NULL, * item;  
52      unsigned int pkalgo;  
53    /* Overwrite passphrase and free memory. */
54      switch( msg )  {  static void
55      case WM_INITDIALOG:  burn_passphrase (char **pwd)
56          hide = 1;  {
57          c = (passphrase_cb_s *)lparam;      char *pass = *pwd;
58          if (!c)      wipememory (pass, strlen (pass));
59              BUG (0);      delete []pass;
60          SetWindowText (dlg, c->title);      *pwd = NULL;
61          if (c->gpg_cmd == GPG_CMD_DECRYPT) {  }
62              SetDlgItemText( dlg, IDC_DECRYPT_LISTINF,  
63                  _("Encrypted with the following public key(s)") );  
64              CheckDlgButton( dlg, IDC_DECRYPT_HIDE, BST_CHECKED );  /* Dialog procedure for the passphrase callback. */
65          }  static BOOL CALLBACK
66          else if( c->gpg_cmd == GPG_CMD_SIGN )  passphrase_callback_proc (HWND dlg, UINT msg, WPARAM wparam, LPARAM lparam)
67              CheckDlgButton( dlg, IDC_DECRYPT_SIGN_HIDE, BST_CHECKED );  {    
68          if( c->enc_to && c->gpg_cmd == GPG_CMD_DECRYPT ) {      static passphrase_cb_s *c;
69              gpgme_recipients_enum_open( c->enc_to, &ctx );      gpgme_decrypt_result_t res=NULL;
70              while ( (s = gpgme_recipients_enum_read( c->enc_to, &ctx )) ) {      gpgme_sign_result_t res_sig=NULL;
71                  pkalgo = *s; s++;      gpgme_key_t key;
72                  get_pubkey( s, &key );      gpgme_recipient_t recip=NULL, r;
73                  if( key ) {      void *item;
74                      char * uid = NULL;      const char *id;
75                      id = gpgme_key_get_string_attr( key, GPGME_ATTR_USERID, NULL, 0 );      char *info;
76                      if( !id )      int n;
77                          id = _("Invalid User ID");  
78                      uid = utf8_to_wincp (id, strlen (id));                      switch (msg) {
79                      _snprintf( info, sizeof info - 1, "%s (%s, 0x%s)", uid,      case WM_INITDIALOG:
80                                  gpgme_key_expand_attr( GPGME_ATTR_ALGO, pkalgo ), s+8 );          c = (passphrase_cb_s *)lparam;
81                      free( uid );          if (!c)
82                  }              BUG (0);
83                  else          SetDlgItemText (dlg, IDC_DECRYPT_HIDE, _("&Hide Typing"));
84                      _snprintf( info, sizeof info - 1, _("Unknown (key ID 0x%s)"),          SetWindowText (dlg, c->title);
85                                 s? s + 8 : "DEADBEEF" );          if (c->gpg_cmd == GPG_CMD_DECRYPT) {
86                  listbox_add_string( GetDlgItem( dlg, IDC_DECRYPT_LIST ), info );              SetDlgItemText (dlg, IDC_DECRYPT_LISTINF,
87              }                              _("Encrypted with the following public key(s)"));
88              gpgme_recipients_enum_close( c->enc_to, &ctx );              CheckDlgButton (dlg, IDC_DECRYPT_HIDE, BST_CHECKED);
89          }          }
90          SetDlgItemText( dlg, c->gpg_cmd == GPG_CMD_DECRYPT?          else if (c->gpg_cmd == GPG_CMD_SIGN)
91                          IDC_DECRYPT_PWDINFO : IDC_DECRYPT_SIGN_PWDINFO,              CheckDlgButton (dlg, IDC_DECRYPT_SIGN_HIDE, BST_CHECKED);
92                          _("Please enter your passphrase") );          if (c->recipients)
93          if( c->gpg_cmd == GPG_CMD_DECRYPT ) {              recip = c->recipients; /* recipients were already extracted. */
94              SetFocus( GetDlgItem( dlg, IDC_DECRYPT_PWD ) );          else {
95              SetDlgItemText( dlg, IDC_DECRYPT_MSG, c->info );              /* XXX: not all ENCRYPT_TO entries are listed here. */
96          }              res = gpgme_op_decrypt_result (c->gpg);
97          else {              if (res && res->recipients)
98              SetFocus( GetDlgItem( dlg, IDC_DECRYPT_SIGN_PWD ) );                  recip = res->recipients;
99              SetDlgItemText( dlg, IDC_DECRYPT_SIGN_MSG, c->info );          }
100          }          if (recip != NULL && c->gpg_cmd == GPG_CMD_DECRYPT) {
101          center_window( dlg );              for (r = res->recipients; r; r = r->next) {
102          SetForegroundWindow( dlg );                  get_pubkey (r->keyid, &key);
103          set_active_window( dlg );                  if (key) {
104          return FALSE;                      char *uid;
105                        id = key->uids->name;
106          case WM_SYSCOMMAND:                      if (!id)
107              if( LOWORD( wparam ) == SC_CLOSE ) {                          id = _("Invalid User ID");
108                  SetDlgItemText( dlg, item_ctrl_id( c->gpg_cmd ), "" );                      uid = utf8_to_wincp (id, strlen (id));
109                  c->cancel = 1;                      info = new char [32+strlen (uid)+1 + 4 + strlen (r->keyid)+1
110                  EndDialog( dlg, TRUE );                                       + strlen (key->uids->email)+1];
111              }                      if (!info)
112              return FALSE;                          BUG (NULL);
113                        sprintf (info, "%s <%s> (%s, 0x%s)", uid, key->uids->email,
114          case WM_COMMAND:                               get_key_pubalgo (r->pubkey_algo), r->keyid+8);
115              switch( HIWORD( wparam ) ) {                      free (uid);
116              case BN_CLICKED:                      
117                  if ( LOWORD( wparam ) == IDC_DECRYPT_HIDE                  }
118                      || LOWORD( wparam ) == IDC_DECRYPT_SIGN_HIDE ) {                  else {
119                      HWND hwnd;                      info = new char [32 + strlen (r->keyid)+1 + 4];
120                      hide ^= 1;                      if (!info)
121                      hwnd = GetDlgItem( dlg, item_ctrl_id( c->gpg_cmd ) );                          BUG (NULL);
122                      SendMessage( hwnd, EM_SETPASSWORDCHAR, hide? '*' : 0, 0 );                      sprintf (info, _("Unknown key ID (%s, 0x%s)"),
123                      SetFocus( hwnd );                               get_key_pubalgo (r->pubkey_algo), r->keyid+8);
124                  }                  }
125              }                  listbox_add_string (GetDlgItem (dlg, IDC_DECRYPT_LIST), info);
126                    free_if_alloc (info);
127              switch (LOWORD (wparam)) {              }
128              case IDOK:            }
129                  /* fixme: the item is even cached when the passphrase is not          else if (c->gpg_cmd == GPG_CMD_DECRYPT)
130                            correct, which means that the user needs to delete all              EnableWindow (GetDlgItem (dlg, IDC_DECRYPT_LIST), FALSE);
131                            cached entries to continue. */          SetDlgItemText (dlg, c->gpg_cmd == GPG_CMD_DECRYPT?
132                  GetDlgItemText (dlg, item_ctrl_id (c->gpg_cmd), c->pwd, sizeof (c->pwd) -1);                          IDC_DECRYPT_PWDINFO : IDC_DECRYPT_SIGN_PWDINFO,
133                  if (reg_prefs.cache_time > 0 && !c->is_card && !strstr (c->keyid, "missing")) {                          c->bad_pwd? _("Bad passphrase; Enter passphrase again") :
134                      if (agent_get_cache (c->keyid, &item))                          _("Please enter your passphrase"));
135                          agent_unlock_cache_entry (&item);          if (c->gpg_cmd == GPG_CMD_DECRYPT) {
136                      else              SetFocus (GetDlgItem (dlg, IDC_DECRYPT_PWD));
137                          agent_put_cache (c->keyid, c->pwd, reg_prefs.cache_time);              if (res && !res->recipients) {
138                  }                  const char *s = _("Symmetric encryption.\n"
139                  EndDialog (dlg, TRUE);                                    "%s encrypted data.");
140                  return TRUE;                  const char *alg = get_symkey_algo (c->sym.sym_algo);
141                                    info = new char[strlen (s) + strlen (alg) + 2];
142              case IDCANCEL:                  if (!info)
143                  SetDlgItemText (dlg, item_ctrl_id (c->gpg_cmd), "" );                      BUG (NULL);
144                  c->cancel = 1;                  sprintf (info, s, alg);
145                  EndDialog (dlg, FALSE);                  SetDlgItemText (dlg, IDC_DECRYPT_MSG, info);
146                  return FALSE;                  free_if_alloc (info);
147              }              }
148              break;              else
149      }                  SetDlgItemText (dlg, IDC_DECRYPT_MSG, c->info);
150                }
151      return FALSE;          else {
152  } /* passphrase_callback_proc */              SetFocus( GetDlgItem (dlg, IDC_DECRYPT_SIGN_PWD));
153                SetDlgItemText (dlg, IDC_DECRYPT_SIGN_MSG, c->info);
154            }
155  static const char *          center_window (dlg, NULL);
156  parse_gpg_keyid( const char * desc )          SetForegroundWindow (dlg);
157  {          set_active_window (dlg);
158      static char keyid[16+1];          return FALSE;
159      char * p;  
160                case WM_SYSCOMMAND:
161      p = strrchr( desc, '\n' );              if (LOWORD (wparam) == SC_CLOSE) {
162      if( !p )                  SetDlgItemText (dlg, item_ctrl_id (c->gpg_cmd), "");
163          return NULL;                  c->cancel = 1;
164      /* the format of the desc buffer looks like this:                  EndDialog (dlg, TRUE);
165         request_keyid[16] main_keyid[16] keytype[1] keylength[4]              }
166         we use the main keyid to use only one cache entry. */              break;
167      strncpy( keyid, desc+(p-desc+1+17), 16 );  
168      return keyid;          case WM_COMMAND:
169  } /* parse_gpg_keyid */              switch (HIWORD (wparam)) {
170                case BN_CLICKED:
171                    if  (LOWORD (wparam) == IDC_DECRYPT_HIDE
172  static void                      || LOWORD (wparam) == IDC_DECRYPT_SIGN_HIDE) {
173  parse_gpg_description( char * desc, int size )                      HWND hwnd;
174  {                      int hide = IsDlgButtonChecked (dlg, item_ctrl_id2 (c->gpg_cmd));
175      char * buffer = NULL, ch, uid[128] = {0}, * uid2 = NULL;                      hwnd = GetDlgItem (dlg, item_ctrl_id (c->gpg_cmd));
176      char usedkey[16+1] = {0}, mainkey[16+1] = {0};                      SendMessage (hwnd, EM_SETPASSWORDCHAR, hide? '*' : 0, 0);
177      const char * buf;                      SetFocus (hwnd);
178      int i, algo, try_again = 0;                  }
179                }
180      if( stristr( desc, "[User ID hint missing]" )  
181          || stristr( desc, "[passphrase info missing]" ) ) {              switch (LOWORD (wparam)) {
182          _snprintf( desc, size-1,              case IDOK:  
183                     _("You need a passphrase to unlock the secret key for\n"                  /* XXX: the item is even cached when the passphrase is not
184                       "user: [UserID hint missing]\n"                          correct, which means that the user needs to delete all
185                       "      [passphrase info missing]\n") );                          cached entries to continue. */
186          return;                  if (c->pwd)
187      }                      burn_passphrase (&c->pwd);
188                    n = item_get_text_length (dlg, item_ctrl_id (c->gpg_cmd));
189      buffer = new char[size+1];                  if (!n) {
190      if( !buffer )                      c->pwd = new char[2];
191          BUG( NULL );                      if (!c->pwd)
192      strcpy( buffer, desc );                          BUG (NULL);
193      buf = buffer;                      strcpy (c->pwd, "");
194      if( strstr( buf, "TRY_AGAIN" ) ) {                  }
195          buf += strlen( "TRY_AGAIN\n" );                  else {
196          try_again = 1;                      c->pwd = new char[n+2];
197      }                      if (!c->pwd)
198      else if( strstr( buf, "ENTER_PASSPHRASE" ) )                          BUG (NULL);
199          buf += strlen( "ENTER_PASSPHRASE\n" );                      GetDlgItemText (dlg, item_ctrl_id (c->gpg_cmd), c->pwd, n+1);
200      else                  }
201          BUG( NULL );                  res = gpgme_op_decrypt_result (c->gpg);
202      buf += 17;                  if (!res)
203      for( i = 0; i < sizeof uid-1; i++ ) {                      res_sig = gpgme_op_sign_result (c->gpg);            
204          ch = *buf++;                  if (reg_prefs.cache_time > 0 && !c->is_card &&
205          if( ch == '\n' ) {                      (res || res_sig)) {
206              uid[i] = '\0';                      if (agent_get_cache (c->keyid, &item))                      
207              break;                          agent_unlock_cache_entry (&item);
208          }                      else
209          uid[i] = ch;                          agent_put_cache (c->keyid, c->pwd, reg_prefs.cache_time);
210      }                  }
211      memcpy( usedkey, buf, 16 );                  c->cancel = 0;
212      usedkey[16] = '\0';                  EndDialog (dlg, TRUE);
213      buf += 17;                  return TRUE;
214      memcpy( mainkey, buf, 16 );                  
215      mainkey[16] = '\0';              case IDCANCEL:
216      buf += 17;                  SetDlgItemText (dlg, item_ctrl_id (c->gpg_cmd), "");
217      if( !buf )                  c->cancel = 1;
218          BUG( NULL );                  EndDialog (dlg, FALSE);
219      algo = atol( buf );                  return FALSE;
220      free_if_alloc( buffer );              }
221                break;
222      uid2 = utf8_to_wincp (uid, strlen (uid));      }
223        
224      if( strcmp( usedkey, mainkey ) )      return FALSE;
225          _snprintf( desc, size-1,  }
226                     _("You need a passphrase to unlock the secret key for\n"  
227                       "user: \"%s\"\n"  
228                       "%s key, ID %s (main key ID %s)\n"),  /* Extract the main keyid from @pass_info.
229                     uid2, gpgme_key_expand_attr( GPGME_ATTR_ALGO, algo ),     Return value: long main keyid or NULL for an error. */
230                     usedkey+8, mainkey+8 );  static const char*
231      else if( !strcmp( usedkey, mainkey ) )  parse_gpg_keyid (const char *pass_info)
232          _snprintf( desc, size-1,  {
233                     _("You need a passphrase to unlock the secret key for\n"      static char keyid[16+1];
234                       "user: \"%s\"\n"      
235                       "%s key, ID %s\n"),      /* XXX: check for leading alpha-chars? */
236                       uid2, gpgme_key_expand_attr( GPGME_ATTR_ALGO, algo ),      if (strlen (pass_info) < 16) {
237                       usedkey+8 );          log_debug ("parse_gpg_keyid: error '%s'\r\n", pass_info);
238      free( uid2 );          return NULL;
239  } /* parse_gpg_describtion */      }
240        /* the format of the desc buffer looks like this:
241           request_keyid[16] main_keyid[16] keytype[1] keylength[4]
242  static int inline         we use the main keyid to use only one cache entry. */
243  is_hexstring( const char * p )      strncpy (keyid, pass_info+17, 16);
244  {      keyid[16] = 0;
245      size_t i;      return keyid;
246      for( i=0; i < strlen( p ); i++ ) {  }
247          if( !isxdigit( p[i] ) )  
248              return -1;  
249      }  /* Parse the information in @uid_hint and @pass_info to generate
250      return 0;     a input message for the user in @desc. */
251  }  static int
252    parse_gpg_description (const char *uid_hint, const char *pass_info,
253                           char *desc, int size)
254  const char *  {
255  passphrase_cb( void * opaque, const char * desc, void * r_hd )      gpgme_pubkey_algo_t algo;
256  {        char usedkey[16+1];
257      passphrase_cb_s * c = (passphrase_cb_s *)opaque;      char mainkey[16+1];
258      void * item;      char *uid, *p;
259      const char * pass, * keyid;      int n=0;
260      int rc = 0;  
261        algo = (gpgme_pubkey_algo_t)0;
262      if( !c )      /* Each uid_hint contains a long key-ID so it is at least 16 bytes. */
263          return NULL;      if (strlen (uid_hint) < 17) {
264            *desc = 0;
265      if( desc ) {          log_debug ("parse_gpg_description: error '%s'\r\n", uid_hint);
266          keyid = parse_gpg_keyid( desc );          return -1;
267          pass = agent_get_cache( keyid, &item );      }
268          if( pass ) {  
269              agent_unlock_cache_entry( &item );      while (p = strsep ((char**)&pass_info, " ")) {
270              c->pwd_init = 0;          switch (n++) {
271              return pass;          case 0: strncpy (mainkey, p, 16); mainkey[16] = 0; break;
272          }          case 1: strncpy (usedkey, p, 16); usedkey[16] = 0; break;
273      }          case 2: algo = (gpgme_pubkey_algo_t)atol (p); break;
274            }
275      if( c->pwd_init ) {      }
276          c->keyid = keyid;      uid_hint += 16; /* skip keyid */
277          /* if the desc has a length of 32 and only hex digits, we assume a      uid_hint += 1;  /* space */
278             smart card has been used. */  
279          /*log_box( "", 0, "%s %d %d", desc,strlen( desc), is_hexstring( desc ) );*/      uid = utf8_to_wincp (uid_hint, strlen (uid_hint));
280          if( desc && strlen( desc ) == 32 && !is_hexstring( desc ) ) {  
281              char buf[16];      if (strcmp (usedkey, mainkey))
282              memset( buf, 0, sizeof buf );          _snprintf (desc, size-1,
283              strncpy( buf, desc+20, 8 );                     _("You need a passphrase to unlock the secret key for\n"
284              _snprintf( c->info, sizeof c->info-1,                       "user: \"%s\"\n"
285                      _("Please enter the PIN to unlock your secret card key\n"                       "%s key, ID %s (main key ID %s)\n"),
286                        "Card: %s"), buf );                     uid, get_key_pubalgo (algo), usedkey+8, mainkey+8);
287              c->is_card = 1;      else if (!strcmp (usedkey, mainkey))
288          }          _snprintf (desc, size-1,
289          else if( desc ) {                     _("You need a passphrase to unlock the secret key for\n"
290              strcpy( c->info, desc );                       "user: \"%s\"\n"
291              parse_gpg_description( c->info, sizeof c->info - 1 );                       "%s key, ID %s\n"),
292          }                       uid, get_key_pubalgo (algo), usedkey+8);
293          if( c->gpg_cmd == GPG_CMD_DECRYPT ) {      free (uid);
294              rc = DialogBoxParam( glob_hinst, (LPCSTR)IDD_WINPT_DECRYPT,      return 0;
295                                  (HWND)c->hwnd, passphrase_callback_proc,  }
296                                  (LPARAM)c );  
297          }  
298          else if( c->gpg_cmd == GPG_CMD_SIGN ) {  /* Extract the serial number from the card ID @id and return it. */
299              rc = DialogBoxParam( glob_hinst, (LPCSTR)IDD_WINPT_DECRYPT_SIGN,  const char*
300                                  (HWND)c->hwnd, passphrase_callback_proc,  extract_serial_no (const char *id)
301                                  (LPARAM)c );  {
302          }      static char buf[8];
303          if( rc == -1 )      char *p;
304              return NULL;  
305          c->pwd_init = 0;      p = strchr (id, '/');
306      }      if (!p) {
307            log_debug ("extract_serial_no: error '%s'\r\n", id);
308      if( c->cancel )          return NULL;
309          return NULL;      }
310        strncpy (buf, id+(p-id)-6, 6);
311      return c->pwd;      return buf;
312  } /* passphrase_cb */  }
313    
314    
315  void  /* Passphrase callback with the ability to support caching. */
316  set_gpg_passphrase_cb( gpgme_ctx_t c, passphrase_cb_s * ctx, int cmd,  gpgme_error_t
317                         HWND hwnd, const char * title )  passphrase_cb (void *hook, const char *uid_hint,
318  {                 const char *passphrase_info,
319      ctx->gpg_cmd = cmd;                 int prev_was_bad, int fd)
320      ctx->is_card = 0;  {
321      ctx->cancel = 0;      passphrase_cb_s *c = (passphrase_cb_s*)hook;
322      ctx->hwnd = hwnd;      HANDLE hd = (HANDLE)fd;
323      ctx->pwd_init = 1;      void *item;
324      if( strlen( title ) > 256 )      const char *keyid=NULL, *pass;
325          BUG( NULL ); /* check bounds */      DWORD n;
326      strcpy( ctx->title, title );      int rc = 0;
327      gpgme_set_passphrase_cb( c, passphrase_cb, ctx );  
328  } /* set_gpg_passphrase_cb */      if (!c) {
329            log_debug ("passphrase_cb: error '!c'\r\n");
330            return gpg_error (GPG_ERR_INV_ARG);
331        }
332        c->bad_pwd = prev_was_bad? 1 : 0;
333        if (prev_was_bad && !c->cancel) {
334            if (c->pwd)
335                burn_passphrase (&c->pwd);
336            agent_del_cache (c->keyid);
337            c->pwd_init = 1;
338        }
339    
340        if (passphrase_info) {
341            if (strlen (passphrase_info) < 16 &&
342                !strstr (passphrase_info, "OPENPGP")) {
343                /* assume symetric encryption. */
344                int pos=2;
345                c->sym.sym_algo = atoi (passphrase_info);
346                if (c->sym.sym_algo > 9)
347                    pos++;
348                /* XXX: be more strict. */
349                c->sym.s2k_mode = atoi (passphrase_info+pos);
350                c->sym.s2k_hash = atoi (passphrase_info+pos+2);
351            }
352    
353            keyid = parse_gpg_keyid (passphrase_info);
354            pass = agent_get_cache (keyid+8, &item);        
355            if (pass) {
356                agent_unlock_cache_entry (&item);
357                c->pwd_init = 0;
358                if (!WriteFile (hd, pass, strlen (pass), &n, NULL))
359                    log_debug ("passphrase_cb: WriteFile() failed ec=%d\n", w32_errno);
360                if (!WriteFile (hd, "\n", 1, &n, NULL))
361                    log_debug ("passphrase_cb: WriteFile() failed ec=%d\n", w32_errno);
362                return 0;
363            }
364        }
365    
366        if (c->pwd_init) {
367            if (keyid && strlen (keyid) == 16)
368                strcpy (c->keyid, keyid+8);
369    
370            /* if @passphrase_info contains 'OPENPGP' we assume a smart card
371                has been used. */
372            if (strstr (passphrase_info, "OPENPGP")) {
373                const char *s=passphrase_info;
374                while (s && *s && *s != 'D')
375                    s++;
376                _snprintf (c->info, sizeof c->info-1,
377                           _("Please enter the PIN to unlock your secret card key\n"
378                             "Card: %s"), extract_serial_no (s));
379                c->is_card = 1;
380            }
381            else if (uid_hint)
382                parse_gpg_description (uid_hint, passphrase_info,
383                                       c->info, sizeof c->info - 1);
384            if (c->gpg_cmd == GPG_CMD_DECRYPT) {
385                rc = DialogBoxParam (glob_hinst, (LPCSTR)IDD_WINPT_DECRYPT,
386                                     (HWND)c->hwnd, passphrase_callback_proc,
387                                     (LPARAM)c);
388            }
389            else if (c->gpg_cmd == GPG_CMD_SIGN) {
390                rc = DialogBoxParam (glob_hinst, (LPCSTR)IDD_WINPT_DECRYPT_SIGN,
391                                     (HWND)c->hwnd, passphrase_callback_proc,
392                                     (LPARAM)c);
393            }
394            if (rc == -1) {
395                if (!WriteFile (hd, "\n", 1, &n, NULL))
396                    log_debug ("passphrase_cb: WriteFile() failed ec=%d\n", w32_errno);
397                return 0;
398            }
399            c->pwd_init = 0;
400        }
401        if (c->cancel) {
402            if (!WriteFile (hd, "\n", 1, &n, NULL))
403                log_debug ("passphrase_cb: WriteFile() failed ec=%d\n", w32_errno);
404            return 0;
405        }
406    
407        if (!WriteFile (hd, c->pwd, strlen (c->pwd), &n, NULL))
408            log_debug ("passphrase_cb: WriteFile() failed ec=%d\n", w32_errno);
409        if (!WriteFile (hd, "\n", 1, &n, NULL))
410            log_debug ("passphrase_cb: WriteFile() failed ec=%d\n", w32_errno);
411        return 0;
412    }
413    
414    
415    /* Initialize the given passphrase callback @cb with the
416       used gpgme context @ctx, the command @cmd and a title
417       @title for the dialog. */
418    void
419    set_gpg_passphrase_cb (passphrase_cb_s *cb, gpgme_ctx_t ctx,
420                           int cmd, HWND hwnd, const char *title)
421    {
422        memset (cb, 0, sizeof *cb);
423        cb->gpg_cmd = cmd;
424        cb->bad_pwd = 0;
425        cb->is_card = 0;
426        cb->cancel = 0;
427        cb->hwnd = hwnd;
428        cb->pwd_init = 1;
429        free_if_alloc (cb->title);
430        cb->title = m_strdup (title);
431        if (!cb->title)
432            BUG (NULL);
433        gpgme_set_passphrase_cb (ctx, passphrase_cb, cb);
434        cb->gpg = ctx;
435    }
436    
437    
438    /* Release a passphrase callback @ctx. */
439    void
440    release_gpg_passphrase_cb (passphrase_cb_s *ctx)
441    {
442        gpgme_recipient_t r, n;
443    
444        if (!ctx)
445            return;
446        sfree_if_alloc (ctx->pwd);
447        free_if_alloc (ctx->title);
448        r = ctx->recipients;
449        while (r) {
450            n = r->next;
451            safe_free (r->keyid);
452            safe_free (r);
453            r = n;
454        }
455    }
456    
457    
458    /* Simple check to measure passphrase (@pass) quality.
459       Return value: 0 on success. */
460    int
461    check_passwd_quality (const char *pass, int strict)
462    {
463        int i, nd=0, nc=0, n;
464    
465        n = strlen (pass);
466        if (n < 8)
467            return -1;
468    
469        for (i=0; i < n; i++) {
470            if (isdigit (pass[i]))
471                nd++;
472            if (isalpha (pass[i]))
473                nc++;
474        }
475    
476        /* check that the passphrase contains letters and numbers. */
477        if (nd == n || nc == n)
478            return -1;
479    
480        return 0;
481    }
Legend:
Removed from v.4  
changed lines
  Added in v.85
[email protected]
 ViewVC Help
Powered by ViewVC 1.1.26