/[winpt]/trunk/Src/wptGPG.cpp
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revision 25 by twoaday, Wed Oct 12 10:04:26 2005 UTC revision 328 by twoaday, Fri Sep 25 16:07:38 2009 UTC
# Line 1  Line 1 
1  /* wptGPG.cpp - GnuPG configuration  /* wptGPG.cpp - GnuPG configuration
2   *      Copyright (C) 2001-2004 Timo Schulz   *      Copyright (C) 2001-2009 Timo Schulz
3   *   *
4   * This file is part of WinPT.   * This file is part of WinPT.
5   *   *
6   * WinPT is free software; you can redistribute it and/or   * WinPT is free software; you can redistribute it and/or
7   * modify it under the terms of the GNU General Public License   * modify it under the terms of the GNU General Public License
8   * as published by the Free Software Foundation; either version 2   * as published by the Free Software Foundation; either version 2
9   * of the License, or (at your option) any later version.   * of the License, or (at your option) any later version.
10   *     *  
11   * WinPT is distributed in the hope that it will be useful,   * WinPT is distributed in the hope that it will be useful,
12   * but WITHOUT ANY WARRANTY; without even the implied warranty of   * but WITHOUT ANY WARRANTY; without even the implied warranty of
13   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14   * General Public License for more details.   * General Public License for more details.
15   *   */
16   * You should have received a copy of the GNU General Public License  #ifdef HAVE_CONFIG_H
17   * along with WinPT; if not, write to the Free Software Foundation,  #include <config.h>
18   * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA  #endif
19   */  
20    #include <windows.h>
21  #include <string.h>  #include <string.h>
22  #include <stdio.h>  #include <stdio.h>
23  #include <windows.h>  #include <shlobj.h>
24  #include <shlobj.h>  #include <ctype.h>
25  #include <ctype.h>  #include <io.h>
26  #include <io.h>  #include <time.h>
27    
28  #include "wptGPG.h"  #include "wptGPG.h"
29  #include "wptGPGCmds.h"  #include "wptGpgCmds.h"
30  #include "wptGPGOptSkel.h"  #include "wptTypes.h"
31  #include "wptTypes.h"  #include "wptNLS.h"
32  #include "wptNLS.h"  #include "wptRegistry.h"
33  #include "wptRegistry.h"  #include "wptErrors.h"
34  #include "wptErrors.h"  #include "wptW32API.h"
35  #include "wptW32API.h"  #include "wptCrypto.h"
36    
37  #define GPG_CONF "gpg.conf"  #define GPG_CONF        "gpg.conf"
38    #define GPG_REG_EXE     "gpgProgram"    /* registry name for the binary. */
39  struct gpg_watcher_s {  #define GPG_REG_HOME    "HomeDir"       /* registry name of the home dir. */
40      FILETIME last_access;  
41      FILETIME access;  /* Context to monitor GPG file changes. */
42      char * object;  struct gpg_monitor_s {
43      int modified;      FILETIME    last_access;    /* last write access. */
44  };      FILETIME    access;
45        char        *object;        /* name of the object. */
46  /* XXX need to watch for gpg.conf due to the fact keyring entries could be changed */      char        *fpath_object;  /* full path to the object. */
47  static const char * gpg_objs[] = {"pubring.gpg", "secring.gpg", "trustdb.gpg"};      int         modified;       /* 1 = modified. */
48  static gpg_watcher_s gpg_table[3];  };
49  static int gpg_table_count = DIM (gpg_table);  typedef struct gpg_monitor_s *gpg_monitor_t;
50    
51  int idea_available = 0;  static const char *gpg_objs[] = {"pubring.gpg", "secring.gpg", "trustdb.gpg"};
52    static gpg_monitor_s gpg_table[3];
53  static int check_keyring (char ** r_path);  static int gpg_table_count = DIM (gpg_table);
54    
55    int idea_available = 0; /* if the IDEA extension is available. */
56  static char*  
57  multi_gnupg_path (void)  
58  {  static int check_keyring (char ** r_path);
59      static char buf[256+64];  
60      BOOL ec;  
61    /* Return the application data folder of the current user. */
62      /* MSDN: buf must be at least MAX_PATH=256 bytes */  char*
63      memset (buf, 0, sizeof (buf));  multi_gnupg_path (int strict)
64      ec = SHGetSpecialFolderPath (HWND_DESKTOP, buf, CSIDL_APPDATA, TRUE);  {
65      if (ec != 1)      static char buf[MAX_PATH+64];
66          return NULL;      BOOL ec;
67      strcat (buf, "\\gnupg");  
68      if (access (buf, 00))      /* MSDN: buf must be at least MAX_PATH=256 bytes */
69          return NULL;      memset (buf, 0, sizeof (buf));
70      return m_strdup (buf);      /* XXX: ec should be NOERROR (MSDN) but NOERROR is defined as '0' !? */
71  }      ec = SHGetSpecialFolderPath (HWND_DESKTOP, buf, CSIDL_APPDATA, TRUE);
72        if (ec != 1) {
73  /*          log_debug ("multi_gnupg_path: SHGetSpecialFolderPath() failed\r\n",
74   * Return the full path of the GnuPG application. First the registry is scanned                     (int)GetLastError ());
75   * for the entry 'HomeDir'. If it wasn't set, the default dir C:\GNUPG is used.          return NULL;
76   */      }
77  char*      strcat (buf, "\\gnupg");
78  get_gnupg_path (void)      if (strict && access (buf, 00))
79  {          return NULL;
80      char *p = NULL, *path = NULL;      return m_strdup (buf);
81        }
82      p = get_reg_entry_gpg ("HomeDir");  
83      if (p) {  
84          path = m_strdup (p);  /* Return the full path to the GPG home directory. First the 'HomeDir' entry
85          free_if_alloc (p);     from the registry is used. Then the default $APPDATA\gnupg path. */
86          return path;  char*
87      }  get_gnupg_path (void)
88      else  {
89          return multi_gnupg_path ();      char *path;
90      return m_strdup ("c:\\gnupg");  
91  } /* get_gnupg_path */      path = get_reg_entry_gpg (GPG_REG_HOME);
92        if (path && dir_exist_check (path) == 0)
93            return path;
94  char*      free_if_alloc (path);
95  get_gnupg_cfgfile (void)      return multi_gnupg_path (1);
96  {      }
97      char *p = NULL, *optfile = NULL, *path = NULL;  
98      size_t nlen = 0;  
99    /* Return the full path of the gpg config file.
100      path = get_gnupg_path ();     A value of NULL indicates an error. */
101      if (path == NULL)  char*
102          return NULL;  get_gnupg_cfgfile (void)
103      p = get_reg_entry_gpg ("OptFile");  {
104      if (p && !strcmp (p, ""))      char *optfile;
105      {      char *path;
106          nlen = strlen (path) + 64;  
107          optfile = new char[nlen + 1];      path = get_gnupg_path ();
108          if (optfile == NULL)      if (!path)
109              BUG (0);          return NULL;
110          _snprintf (optfile, nlen, "%s\\"GPG_CONF, path);      optfile = make_filename (path, GPG_CONF, NULL);
111      }      free_if_alloc (path);
112      else if( p ) {  
113          nlen = strlen( p ) + 4;      return optfile;
114          optfile = new char[nlen + 1];  }
115          if( optfile == NULL )  
116              BUG( NULL );  
117          _snprintf( optfile, nlen, "%s", p );  static char*
118      }  get_keyring_from_conf (const char *fname, int pub)
119      else {  {
120          nlen = strlen( path ) + 64;      config_file_t opt;
121          optfile = new char[nlen + 1];      conf_option_t e;
122          if( optfile == NULL )      char *kring = NULL;
123              BUG( NULL );      int rc;
124          _snprintf( optfile, nlen, "%s\\"GPG_CONF, path );  
125      }      rc = parse_config (fname, &opt);
126      free_if_alloc (path);      if (rc)
127      free_if_alloc (p);          return NULL;
128        if (pub)
129      return optfile;          e = conf_find_option (opt, "keyring");
130  } /* get_gnupg_cfgfile */      else
131            e = conf_find_option (opt, "secret-keyring");
132        if (e != NULL)
133  char *          kring = m_strdup (e->val);
134  get_gnupg_keyring (int pub, int strict)      release_config (opt);
135  {      
136      char * optfile = NULL, * path = NULL;      return kring;
137      char * keyring = NULL;  }
138    
139      path = get_gnupg_path ();  
140      if (!path)  /* Return the full path of the keyring. If @pub is 1, the public
141          return NULL;     keyring is return, otherwise the secret keyring. */
142      keyring = make_filename (path, pub? "pubring" : "secring", "gpg");  char*
143      if (!strict && !file_exist_check (keyring)) {  get_gnupg_keyring (int pub, int strict)
144          free_if_alloc (path);  {    
145          return keyring;      char *optfile;
146      }      char *path;
147      if (file_exist_check (keyring) || get_file_size (keyring) == 0) {      char *keyring;
148          free_if_alloc (keyring);  
149          optfile = make_filename (path, GPG_CONF, NULL);      path = get_gnupg_path ();
150          keyring = get_gnupg_keyring_from_options (optfile, pub);      if (!path)
151      }          return NULL;
152      free_if_alloc (path);      keyring = make_filename (path, pub? "pubring" : "secring", "gpg");
153      free_if_alloc (optfile);      if (strict && !file_exist_check (keyring)) {
154      return keyring;          free_if_alloc (path);
155  } /* get_gnupg_keyring */          return keyring;
156        }
157        else if (!strict) {
158  /*          free_if_alloc (path);
159   * Return the full path (with the gpg exe name). First the registry is scanned          return keyring;
160   * for the entry 'gpgProgram'. If it wasn't set, the default path is the      }
161   * appended string 'gpg.exe' is used.      if (file_exist_check (keyring) ||
162   */          (pub && get_file_size (keyring) == 0)) {
163  char*          free_if_alloc (keyring);
164  get_gnupg_prog (void)          optfile = make_filename (path, GPG_CONF, NULL);
165  {              keyring = get_keyring_from_conf (optfile, pub);
166      char *p, *path, *pgm = NULL;          free_if_alloc (optfile);
167      size_t nlen = 0;      }
168                free_if_alloc (path);
169      path = get_gnupg_path ();      
170      if (path == NULL)      return keyring;
171          return NULL;  }
172    
173      p = get_reg_entry_gpg ("gpgProgram");  
174      if (p == NULL)  /* Return the full path (with the gpg exe name). First the registry is scanned
175          pgm = make_filename (path, "gpg", "exe");     for the entry 'gpgProgram'. If it wasn't set, the default path is the
176      else {     appended string 'gpg.exe' is used. */
177          pgm = m_strdup (p);  char*
178          free_if_alloc (p);  get_gnupg_prog (void)
179      }  {    
180      free_if_alloc (path);      char *path;
181      return pgm;      char *pgm;
182  } /* get_gnupg_prog */  
183        pgm = get_reg_entry_gpg (GPG_REG_EXE);
184        if (pgm)
185  static char *          return pgm;
186  default_key_from_cache (int *ret_no_useable)      path = get_gnupg_path ();
187  {      if (!path)
188      const char * s;          return NULL;    
189      char * keyid = NULL;      pgm = make_filename (path, "gpg", "exe");
190      gpgme_key_t key;      free_if_alloc (path);
191      gpg_keycache_t sec = keycache_get_ctx (0);      return pgm;
192    }
193      if (!sec)  
194          BUG (0);  
195      gpg_keycache_rewind (sec);  /* Retrieve the first usable secret key from cache.
196      while (!gpg_keycache_next_key (sec, 1, &key)) {     If no usable was found, @ret_no_useable is 1.
197          if (key_is_useable (key)) {     Return value: the keyid of the secret key. */
198              s = key->subkeys->keyid;  static char*
199              if (s)      default_key_from_cache (int *ret_no_useable)
200                  keyid = m_strdup (s+8);  {    
201              break;      gpgme_key_t key, pk;
202          }      gpg_keycache_t sec, pub;
203      }      const char *s;
204      if (!keyid) {      char *keyid = NULL;
205          *ret_no_useable = 1;  
206          msg_box( NULL, _("No useable secret key found."), _("GPG Error"), MB_ERR);      sec = keycache_get_ctx (0);
207      }      pub = keycache_get_ctx (1);
208      return keyid;      gpg_keycache_rewind (sec);
209  } /* default_key_from_cache */      while (!gpg_keycache_next_key (sec, 1, &key)) {
210            if (key_is_useable (key) && !get_pubkey (key->subkeys->keyid, &pk)) {
211                s = key->subkeys->keyid;
212  char *              if (s)
213  get_gnupg_default_key (void)                  keyid = m_strdup (s+8);
214  {                  break;
215      gpg_optfile_t opt = NULL;          }
216      gpg_option_t e;      }
217      char * keyid = NULL, * optfile = NULL;      if (!keyid)
218      int no_usable=0, rc = 0;          *ret_no_useable = 1;
219        return keyid;
220      optfile = get_gnupg_cfgfile ();  }
221      if (!optfile)  
222          return default_key_from_cache( &no_usable );  
223      rc = parse_gpg_options( optfile, &opt );  /* Load the gpg.conf and search for some options
224      if( rc ) {     and store the result in the global preference context.
225          free_if_alloc( optfile );     Return value: 0 on success. */
226          return default_key_from_cache( &no_usable );  int
227      }  gnupg_load_config (void)
228      e = find_option( opt, "default-key" );  {    
229      if ( e )      config_file_t opt;
230          keyid = m_strdup( e->val );      char *conf;
231      if( !e ) {      int rc = 0;
232          e = find_option( opt, "local-user" );      
233          if( e )      conf = get_gnupg_cfgfile ();
234              keyid = m_strdup( e->val );      if (!conf)
235      }          return -1;
236      if( !e ) {      if (parse_config (conf, &opt)) {
237          e = find_option( opt, "encrypt-to" );          free_if_alloc (conf);
238          if( e )          return -1;
239              keyid = m_strdup( e->val );      }
240      }      free_if_alloc (conf);
241      free_if_alloc( optfile );      if (conf_find_option (opt, "ask-cert-level"))
242      release_gpg_options( opt );              reg_prefs.gpg.ask_cert_level = 1;
243        if (conf_find_option (opt, "ask-cert-expire"))
244      if( !keyid )          reg_prefs.gpg.ask_cert_expire = 1;
245          keyid = default_key_from_cache( &no_usable );      /* The 'textmode' option for GPG is useful for text files
246      return keyid;         but it breaks the output of any binary data. Thus we return
247  } /* get_gnupg_default_key */         a warning here to inform the user that binary output is broken. */
248        if (conf_find_option (opt, "textmode"))
249            rc = -2;
250  /* Check if the gpg application (exe file) is available. */      release_config (opt);
251  int  
252  check_gnupg_prog (void)      return rc;
253  {  }
254      char *pgm = NULL;  
255      int rc = 0;  
256    /* handle the case the user added a '!' to force a subkey. */
257      pgm = get_gnupg_prog ();  static char*
258      if (!pgm)  extract_keyid (const char *val)
259          rc = WPTERR_GPG_EXEFILE;  {    
260      if (file_exist_check (pgm))      size_t len = strlen (val);
261          rc = WPTERR_GPG_EXEFILE;  
262      free_if_alloc (pgm);      if (len > 1 && val[len-1] == '!')
263      return rc;          return substr (val, 0, len-1);
264  }      return m_strdup (val);
265    }
266    
267  static int  
268  parse_version_nr (const char * buf, int *major, int *minor, int *patch)  /* Return the default key.
269  {     This can be either a substring or a key ID. */
270      char tmp[8];  char*
271      int i;  get_gnupg_default_key (void)
272        {    
273      i=0;      config_file_t opt = NULL;
274      while( buf && *buf != '.' && i < 8 )      conf_option_t e;
275          tmp[i++] = *buf++;      char *keyid = NULL, *optfile = NULL;
276      tmp[i] = 0; buf++;      int no_usable=0;
277      *major = atol( tmp );  
278      i=0;      optfile = get_gnupg_cfgfile ();
279      while( buf && *buf != '.' && i < 8 )      if (!optfile)
280          tmp[i++] = *buf++;          return default_key_from_cache (&no_usable);
281      tmp[i] = 0; buf++;      if (parse_config (optfile, &opt)) {
282      *minor = atol( tmp );          free_if_alloc (optfile);
283      i=0;          return default_key_from_cache (&no_usable);
284      while( buf && isdigit( *buf ) && i < 8 )      }
285          tmp[i++] = *buf++;      /* First we search for config entries which specify a default key. */
286      tmp[i] = 0;      e = conf_find_option (opt, "default-key");
287      *patch = atol( tmp );      if (!e)
288      return 0;          e = conf_find_option (opt, "local-user");
289  }      if (e)
290            keyid = extract_keyid (e->val);
291    
292  /* Check if the gnupg engine fullfills the minimum requirement      free_if_alloc (optfile);
293     version given in @r_major.@r_minor.@r_patch. On success these      release_config (opt);
294     variables contain the GPG version which is installed. */  
295  int      /* If no entry in the config has been found, we get a key
296  check_gnupg_engine (int *r_major, int *r_minor, int *r_patch)         from the key cache. */
297  {      if (!keyid)
298      gpgme_ctx_t ctx;          keyid = default_key_from_cache (&no_usable);
299      gpgme_engine_info_t inf;      return keyid;
300      char * eng = NULL;  }
301      int major=0, minor=0, patch=0;  
302      int rc;  
303            /* Check if GPG4WIN is available and if so, use the
304      gpgme_new (&ctx);     install path to figure out where the gpg.exe is. */
305      inf = gpgme_ctx_get_engine_info (ctx);  char*
306      if (!inf) {  check_for_gpg4win (void)
307          gpgme_release (ctx);  {
308          return -1;      return get_reg_entry_gpg4win ("gpg.exe");
309      }  }
310      /* We need to exec GPG again to find out if IDEA is available. */  
311      if (gpg_get_version (&eng))  
312          return -1;  /* Check if the gpg application (exe file) is available. */
313      if (strstr (eng, "IDEA"))  int
314          idea_available = 1;  check_gnupg_prog (void)
315      free (eng);  {
316      rc = parse_version_nr( inf->version, &major, &minor, &patch );      char *gpgexe = NULL;
317      if( rc ) {      int rc = 0;
318          gpgme_release (ctx);  
319          return rc;      gpgexe = get_gnupg_prog ();
320      }      if (!gpgexe || file_exist_check (gpgexe)) {
321      if (major < *r_major || minor < *r_minor)          free_if_alloc (gpgexe);
322          rc = 1;          gpgexe = check_for_gpg4win ();
323      else {          if (!gpgexe || file_exist_check (gpgexe))
324          if (patch < *r_patch)              rc = WPTERR_GPG_EXEFILE;
325              rc = 1;          else
326          rc = 0;              set_reg_entry_gpg (GPG_REG_EXE, gpgexe);
327      }      }
328      *r_major = major;      free_if_alloc (gpgexe);
329      *r_minor = minor;      return rc;
330      *r_patch = patch;  }
331      return rc;  
332  }  
333    static int
334    parse_version_nr (const char *buf, int *major, int *minor, int *patch)
335  int  {  
336  check_gnupg_cfgfile (const char *fname, int *r_secrings, int *r_pubrings)      char *p;
337  {      char *tmp = m_strdup(buf);
338      gpg_optfile_t opt;          
339      gpg_option_t e;      int pos=0;
340      int rc = 0;      while ((p = strsep(&tmp, ".")) != NULL) {
341            switch (++pos) {
342      if( r_secrings )          case 1: *major = atoi (p); break;
343          *r_secrings = 0;          case 2: *minor = atoi (p); break;
344      if( r_pubrings )          case 3: *patch = atoi (p); break;
345          *r_pubrings = 0;          }
346      rc = parse_gpg_options( fname, &opt );      }
347      if( rc )      delete[] tmp;  
348          return WPTERR_FILE_OPEN;      if (pos != 3)
349            return -1;  
350      for( e = opt->list; e; e = e->next ) {      return 0;
351          if( !strcmp( e->name, "secret-keyring" ) ) {  }
352              if( !file_exist_check( e->val ) )  
353                  r_secrings[0]++;  
354          }  /* Check if the gnupg engine fullfills the minimum requirement
355          else if( !strcmp( e->name, "keyring" ) ) {     version given in @r_major.@r_minor.@r_patch. On success these
356              if( !file_exist_check( e->val ) )     variables contain the GPG version which is installed. */
357                  r_pubrings[0]++;  int
358          }  check_gnupg_engine (const char *need_gpg_ver,
359      }                      int *r_major, int *r_minor, int *r_patch)
360      release_gpg_options( opt );  {
361      return 0;      gpgme_engine_info_t inf;
362  } /* check_gnupg_cfgfile */      char *eng = NULL;
363        int major=0, minor=0, patch=0;
364  /*      int need_major = 0, need_minor = 0, need_patch = 0;
365   * Check if both keyrings are located in the gnupg home directory.      int rc = 1;
366   */  
367  int      /* Convert the needed GPG version to the integer format. */
368  gnupg_access_files (void)      if (parse_version_nr (need_gpg_ver,
369  {                            &need_major, &need_minor, &need_patch))
370      int rc = 0;          return 1;
371      int pubring_ok = 0, secring_ok = 0;      
372      int secrings = 0, pubrings = 0;      if (gpgme_get_engine_info (&inf))
373      char *optfile;       return -1;
374    
375      if (gnupg_access_keyring (1))      /* We need to exec GPG again to find out if IDEA is available. */
376          rc = WPTERR_GPG_KEYRINGS;      if (gpg_get_version (&eng))
377      else       return -1;
378          pubring_ok = 1;      if (strstr (eng, "IDEA"))
379            idea_available = 1;
380      if (gnupg_access_keyring (0))      safe_free (eng);
381          rc = WPTERR_GPG_KEYRINGS;    
382      else      if (parse_version_nr (inf->version, &major, &minor, &patch))
383          secring_ok = 1;          return 1;
384      if (!pubring_ok || !secring_ok) {  
385          optfile = get_gnupg_cfgfile ();      if (major > need_major)
386          if (!optfile)          rc = 0;
387              return WPTERR_GPG_KEYRINGS;      else if (major == need_major && minor > need_minor)      
388          rc = file_exist_check (optfile);          rc = 0;
389          if (!rc && get_file_size(optfile) > 0) {      else if (major == need_major && minor == need_minor &&
390              rc = check_gnupg_cfgfile (optfile, &secrings, &pubrings);               patch >= need_patch)
391              if (!rc && secrings && pubrings) {          rc = 0;
392                  free_if_alloc (optfile);  
393                  return 0; /* found two keyrings in the option file */      /* Return the current GPG version. */
394              }      *r_major = major;
395              else if ((!rc && pubrings && secring_ok)      *r_minor = minor;
396                    || (!rc && secrings && pubring_ok)) {      *r_patch = patch;
397                  free_if_alloc (optfile);      return rc;
398                  return 0; /* found one keyring and one entry in the options file */  }
399              }  
400              else  
401                  return WPTERR_GPG_OPT_KEYRINGS;  /* Count the keyring entries in the gpg.conf file.
402          }     Return value: 0 on success. */
403          free_if_alloc (optfile);  static int
404          rc = WPTERR_GPG_KEYRINGS;  cfgfile_count_keyrings (const char *fname, int *r_secrings, int *r_pubrings)
405      }  {
406      return rc;      config_file_t opt;    
407  } /* gnupg_access_files */      conf_option_t e;
408    
409        *r_secrings = 0;
410  static int      *r_pubrings = 0;
411  create_gpg_options( void )  
412  {      if (parse_config (fname, &opt))
413      FILE *fp;          return WPTERR_FILE_OPEN;
414      char *s, *optfile;      for (e = opt->list; e; e = e->next) {
415            if (!strcmp (e->name, "secret-keyring")) {
416      s = get_gnupg_path( );              if (!file_exist_check (e->val))
417      if( s == NULL )                  r_secrings[0]++;
418          return WPTERR_FILE_CREAT;          }
419      optfile = make_filename( s, GPG_CONF, NULL );          else if (!strcmp (e->name, "keyring")) {
420      fp = fopen( optfile, "wb" );              if (!file_exist_check (e->val))
421      if( fp == NULL ) {                    r_pubrings[0]++;
422          return WPTERR_FILE_CREAT;          }
423          goto fail;      }
424      }      release_config (opt);
425      fwrite( options_skel, 1, strlen( options_skel ), fp );      return 0;
426      fclose( fp );  }
427    
428  fail:  
429      free_if_alloc( s );  /* Usually GPG creates the pubring.gpg, secring.gpg on
430      free_if_alloc( optfile );     the first start, but to make sure they always exist
431      return 0;     create them empty if needed. */
432  } /* create_gpg_options */  static void
433    create_empty_keyring (int _pub)
434    {
435  /*      char *name;
436   * Return the contents of the options file as a char buf.      FILE *fp;
437   */  
438  char *      name = get_gnupg_keyring (_pub, 0);
439  get_gnupg_config (void)      if (name && file_exist_check (name) != 0) {
440  {          fp = fopen (name, "ab");
441      FILE * fp;          if (fp != NULL)
442      char * p = NULL, * optfile = NULL;              fclose (fp);
443      int fsize, rc = 0;      }
444                free_if_alloc (name);
445      optfile = get_gnupg_cfgfile ();  }
446      if( optfile == NULL )  
447          return NULL;  
448      fsize = get_file_size( optfile );  /* Check if both keyrings are located in the gnupg home directory. */
449      if( !fsize ) {  int
450          rc = create_gpg_options( );  gnupg_access_files (void)
451          if ( rc )  {
452              return NULL;      int rc = 0;
453          fsize = get_file_size( optfile );      int pubring_ok = 0, secring_ok = 0;
454      }      int secrings = 0, pubrings = 0;
455      if( fsize > 100000 )      char *optfile;
456          goto leave; /* too large */  
457      p = new char[fsize+1];      create_empty_keyring (1);
458      if( p == NULL )      if (gnupg_access_keyring (1))
459          BUG( NULL );          rc = WPTERR_GPG_KEYRINGS;
460      fp = fopen( optfile, "rb" );      else
461      if( fp == NULL ) {          pubring_ok = 1;
462          free_if_alloc( p );  
463          return NULL;      create_empty_keyring (0);
464      }      if (gnupg_access_keyring (0))
465      fread( p, 1, fsize, fp );          rc = WPTERR_GPG_KEYRINGS;
466      fclose( fp );      else
467      p[fsize] = '\0';          secring_ok = 1;
468      free_if_alloc( optfile );  
469        if (!pubring_ok || !secring_ok) {
470  leave:          optfile = get_gnupg_cfgfile ();
471      return p;          if (!optfile)
472  } /* get_gnupg_config */              return WPTERR_GPG_KEYRINGS;
473            rc = file_exist_check (optfile);
474            if (!rc && get_file_size (optfile) > 0) {
475  int              rc = cfgfile_count_keyrings (optfile, &secrings, &pubrings);
476  set_gnupg_default_key (const char * key)              if (!rc && secrings > 0 && pubrings > 0) {
477  {                  free_if_alloc (optfile);
478      gpg_optfile_t opt;                  return 0; /* found two keyrings in the option file */
479      gpg_option_t e;              }
480      char *optfile = NULL;              else if ((!rc && pubrings && secring_ok)
481      int rc = 0;                    || (!rc && secrings && pubring_ok)) {
482                    free_if_alloc (optfile);
483      optfile = get_gnupg_cfgfile ();                  return 0; /* found one keyring and one entry in the options file */
484      if (!optfile)              }
485          return -1;              else
486      rc = parse_gpg_options (optfile, &opt);                  return WPTERR_GPG_OPT_KEYRINGS;
487      if( rc ) {          }
488          free_if_alloc (optfile);          free_if_alloc (optfile);
489          return -1;          rc = WPTERR_GPG_KEYRINGS;
490      }      }
491      e = find_option (opt, "default-key");      return rc;
492      if (e) {  }
493          free_if_alloc (e->val);  
494          e->val = m_strdup (key);  
495          e->used = 1;  
496      }  /* Return the contents of the options file as a char buf. */
497      else  char*
498          add_entry (opt, ENTRY_MULTI, "default-key", key);  get_gnupg_config (void)
499      rc = commit_gpg_options (optfile, opt);  {
500        FILE *fp;
501      free_if_alloc (optfile);      char *p = NULL, *optfile;
502      release_gpg_options (opt);      int fsize;
503            
504      return rc;      optfile = get_gnupg_cfgfile ();
505  } /* set_gnupg_default_key */      if (!optfile)
506            return NULL;
507        fsize = get_file_size (optfile);
508  /*      if (fsize < 1 || fsize > 100000)
509   * Set the contents of the options file.          goto leave; /* too large or does not exist */
510   */      
511  int      fp = fopen (optfile, "rb");
512  set_gnupg_options( const char *buf, size_t buflen )      if (!fp)
513  {          goto leave;
514      FILE *fp;        p = new char[fsize+1];
515      char *optfile = NULL;      if (!p)
516            BUG (NULL);
517      optfile = get_gnupg_cfgfile( );      fread (p, 1, fsize, fp);
518      if( optfile == NULL )      fclose (fp);
519          return WPTERR_FILE_CREAT;      p[fsize] = '\0';
520        
521      fp = fopen( optfile, "wb" );  leave:
522      if( fp == NULL ) {      free_if_alloc (optfile);
523          free_if_alloc( optfile );      return p;
524          return WPTERR_FILE_CREAT;  }
525      }  
526      fwrite( buf, 1, buflen, fp );  
527      fclose( fp );  /* Set the default key in the gpg.conf.
528      free_if_alloc( optfile );     If @key is NULL, the entry will be deleted. */
529      return 0;  int
530  } /* set_gnupg_options */  set_gnupg_default_key (const char *key)
531    {
532  /*      config_file_t opt;
533   * Check if the line contains a valid GPG argument.      conf_option_t e;
534   */      char *optfile = NULL;
535  static int      int rc = 0;
536  check_line( const char *buf )  
537  {      optfile = get_gnupg_cfgfile ();
538      int j, len;      if (!optfile)
539      int rc = 0;          return WPTERR_FILE_OPEN;
540        rc = parse_config (optfile, &opt);
541      if( *buf == '#' || *buf == '\r' || *buf == '\n' )      if (rc) {
542          return 1;          free_if_alloc (optfile);
543      rc = 0;          return WPTERR_GENERAL;
544      for ( j = 0; valid_gpg_args[j]; j++ ) {      }
545          len = strlen( valid_gpg_args[j] );      e = conf_find_option (opt, "default-key");
546          if( !strncmp( valid_gpg_args[j], buf, len ) )      if (e && !key)
547              rc = 1;              e->used = 0;
548      }      else if (e) {
549            free_if_alloc (e->val);
550      return rc;          e->val = m_strdup (key);
551  } /* check_line */          e->used = 1;
552        }
553        else if (key)
554  int          conf_add_entry (opt, ENTRY_MULTI, "default-key", key);
555  check_gnupg_options( const char *buf )      rc = commit_config (optfile, opt);
556  {  
557      char line[1024];      free_if_alloc (optfile);
558      int nbytes = 0;      release_config (opt);
559      unsigned j;      return rc;
560            }
561      for ( j = 0; j<strlen( buf ) && j < sizeof(line); j++ ) {  
562          line[nbytes++] = buf[j];  
563          if ( buf[j] == '\n' || j == ( strlen( buf ) - 1 ) ) {  /* Set the contents of the options file. */
564              line[nbytes] = '\0';  int
565              if( !check_line( line ) ) {  set_gnupg_options (const char *buf, size_t buflen)
566                  msg_box( NULL, line, "options", MB_OK );  {
567                  return 1;            FILE *fp;  
568              }      char *optfile;
569              nbytes = 0;  
570          }            optfile = get_gnupg_cfgfile ();
571      }      if (!optfile)
572            return WPTERR_FILE_CREAT;
573      return 0;  
574  } /* check_gnupg_options */      fp = fopen (optfile, "wb");
575        if (!fp) {
576            free_if_alloc (optfile);
577  static int          return WPTERR_FILE_CREAT;
578  get_last_gnupg_access (gpg_watcher_s * ctx)      }
579  {      fwrite (buf, 1, buflen, fp);
580      HANDLE fd;      fclose (fp);
581      char *path = NULL, *file = NULL;      free_if_alloc (optfile);
582        return 0;
583      path = get_gnupg_path ();  }
584      file =  make_filename (path, ctx->object, NULL);  
585      fd = CreateFile (file, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_ALWAYS, 0, NULL);  
586      if( fd == INVALID_HANDLE_VALUE ) {  /* Check if the parameter for the option @buf is an existing file name.
587          free_if_alloc (path);     Return value: 0 on success. */
588          free_if_alloc (file);  static int
589          return WPTERR_FILE_OPEN;  check_arg_file_exist (const char *buf)
590      }  {
591      GetFileTime (fd, NULL, NULL, &ctx->access);      const char *s = "load-extension ";
592      CloseHandle (fd);  
593      free_if_alloc (path);            /* XXX: this is a bit of a kludge because we just
594      free_if_alloc (file);              detect errors for 'load-extension'. */
595      return 0;      if (!strncmp (buf, s, strlen (s)))
596  } /* get_last_gnupg_access */          buf += strlen (s);
597        else
598            return 0;
599  static void      return file_exist_check (buf);
600  check_last_gnupg_access( gpg_watcher_s *ctx )  }
601  {                
602      ctx->modified = 0;  
603    /* Check if the line contains a valid GPG argument. */
604      if( ctx->last_access.dwHighDateTime != ctx->access.dwHighDateTime &&  static int
605          ctx->last_access.dwLowDateTime != ctx->access.dwLowDateTime )    check_line (const char *buf)
606          ctx->modified = 1;  {
607        int j, len;
608      ctx->last_access.dwLowDateTime = ctx->access.dwLowDateTime;      int rc = 0;
609      ctx->last_access.dwHighDateTime = ctx->access.dwHighDateTime;  
610  } /* check_last_gnupg_access */      if (*buf == '#' || *buf == '\r' || *buf == '\n')
611            return 1;
612        for (j = 0; valid_gpg_args[j]; j++) {
613  void          len = strlen (valid_gpg_args[j]);
614  init_gnupg_table (void)          if (!strncmp (valid_gpg_args[j], buf, len))
615  {                    rc = 1;
616      int j;      }
617        return rc;
618      for (j = 0; j < gpg_table_count; j++) {  }
619          gpg_table[j].object = m_strdup (gpg_objs[j]);  
620          memset (&gpg_table[j].access, 0, sizeof (FILETIME));  
621          memset (&gpg_table[j].last_access, 0, sizeof (FILETIME));  int
622          gpg_table[j].modified = 0;  check_gnupg_options (const char *buf, int showerr)
623      }  {
624  } /* init_gnupg_table */      char line[1024];
625        int nbytes = 0, lineno=0;
626        unsigned j;
627  void          
628  free_gnupg_table (void)      for  (j = 0; j < strlen (buf) && j < DIM (line); j++) {
629  {          line[nbytes++] = buf[j];
630      int j;          if (buf[j] == '\n' || j == (strlen (buf) - 1)) {
631                line[nbytes] = '\0';
632      for (j=0; j < gpg_table_count; j++)              lineno++;
633          free_if_alloc (gpg_table[j].object);              if (!check_line (line)) {
634  } /* free_gnupg_table */                  if (showerr)
635                        log_box ("GPG Config File", MB_ERR,
636                                 "gpg.conf:%d: invalid keyword '%s'",
637  int                               lineno, line);
638  keyring_check_last_access (void)                  return 1;      
639  {                    }
640      int rc, j;              if (check_arg_file_exist (line))
641                    return WPTERR_FILE_EXIST;
642      rc = 0;              nbytes = 0;
643      for (j = 0; j < gpg_table_count; j++) {          }
644          get_last_gnupg_access( &gpg_table[j] );      }
645          check_last_gnupg_access( &gpg_table[j] );      return 0;
646          if ( gpg_table[j].modified )  }
647              rc++;        
648      }  
649    /* Store the last access of the file inside the watcher @ctx. */
650      return rc;  static int
651  } /* keyring_check_last_access */  get_last_gnupg_access (gpg_monitor_t ctx)
652    {
653        HANDLE fd;
654  const char *  
655  gnupg_check_file_ext (const char * fname)      fd = CreateFile (ctx->fpath_object, GENERIC_READ, FILE_SHARE_READ,
656  {                                     NULL, OPEN_EXISTING, 0, NULL);
657      char file_ext[5];      if (fd == INVALID_HANDLE_VALUE)
658            return WPTERR_FILE_OPEN;
659      if (!strchr( fname, '.' ))      GetFileTime (fd, NULL, NULL, &ctx->access);
660          return "UNKNOWN";      CloseHandle (fd);
661        return 0;
662      strncpy (file_ext, fname + strlen (fname) - 4, 4);  }
663      file_ext[4] = '\0';  
664      if (!stricmp (file_ext, ".asc"))  
665          return "ARMORED";  /* Check if the file inside watcher @ctx was modified. */
666      else if (!stricmp (file_ext, ".sig"))  static void
667          return "SIGNED";  check_last_gnupg_access (gpg_monitor_t ctx)
668      else if  (!stricmp (file_ext, ".gpg")  {              
669          || !stricmp (file_ext, ".pgp"))      ctx->modified = 0;
670          return "ENCRYPTED";  
671      else      if (ctx->last_access.dwHighDateTime != ctx->access.dwHighDateTime &&
672          return "UNKNOWN";          ctx->last_access.dwLowDateTime != ctx->access.dwLowDateTime)
673                    ctx->modified = 1;
674      return "UNKNOWN";  
675  } /* gnupg_check_file_ext */      if (ctx->last_access.dwLowDateTime == 0)
676            ctx->modified = 0;
677    
678  char *      ctx->last_access.dwLowDateTime = ctx->access.dwLowDateTime;
679  get_gnupg_keyring_from_options (const char * fname, int pub)      ctx->last_access.dwHighDateTime = ctx->access.dwHighDateTime;
680  {  }
681      gpg_optfile_t opt;  
682      gpg_option_t e;  
683      char * kring = NULL;  /* Init GPG monitor table for all monitored files. */
684      int rc = 0;  void
685    init_gnupg_table (void)
686      rc = parse_gpg_options (fname, &opt);  {      
687      if (rc)      char *path;
688          return NULL;      int j;
689      if (pub)  
690          e = find_option (opt, "keyring");      path = get_gnupg_path ();
691      else      for (j = 0; j < gpg_table_count; j++) {
692          e = find_option (opt, "secret-keyring");          gpg_table[j].object = m_strdup (gpg_objs[j]);
693      if (e)          gpg_table[j].fpath_object = make_filename (path, gpg_objs[j], NULL);
694          kring = m_strdup (e->val);          memset (&gpg_table[j].access, 0, sizeof (FILETIME));
695      release_gpg_options (opt);          memset (&gpg_table[j].last_access, 0, sizeof (FILETIME));
696            gpg_table[j].modified = 0;
697      return kring;      }
698  } /* get_gnupg_keyring_from_options */      free_if_alloc (path);
699    }
700    
701    
702  /* XXX: does not work with write-protected floppies */  /* Release the GPG monitor table. */
703  static int  void
704  my_access (const char * fname)  free_gnupg_table (void)
705  {  {
706      HANDLE hd;      for (int j=0; j < gpg_table_count; j++) {
707      hd = CreateFile (fname, GENERIC_WRITE, FILE_SHARE_WRITE, NULL, OPEN_EXISTING, 0, NULL);          free_if_alloc (gpg_table[j].object);
708      if (hd == INVALID_HANDLE_VALUE)          free_if_alloc (gpg_table[j].fpath_object);
709          return -1;      }
710      CloseHandle (hd);  }
711      return 0;  
712  } /* my_access */  
713    /* Return the amount of files modified since the last call. */
714    int
715  int  keyring_check_last_access (void)
716  gpg_check_permissions (int showmsg)  {
717  {      int nfiles;
718      char * p, * name = NULL;  
719      int failed = 0, ans=0, attrs=0;      nfiles = 0;
720        for (int pos = 0; pos < gpg_table_count; pos++) {
721      p = get_gnupg_path ();          get_last_gnupg_access (&gpg_table[pos]);
722      check_keyring (&p);          check_last_gnupg_access (&gpg_table[pos]);
723      if (p) {          if (gpg_table[pos].modified)
724          name = make_filename (p, "pubring", "gpg");              nfiles++;
725          free_if_alloc (p);      }
726          if ((attrs=GetFileAttributes (name)) & FILE_ATTRIBUTE_READONLY) {  
727              ans = msg_box (NULL,      return nfiles;
728                             _("The selected keyring has the read-only file\n"  }
729                               "attribute. In this state you do not have write\n"  
730                               "access. Do you want to remove the attribute?"),  
731                       _("GPG Information"), MB_YESNO);  const char*
732              if (ans == IDYES) {  gnupg_check_file_ext (const char *fname, int *r_type)
733                  attrs &= ~FILE_ATTRIBUTE_READONLY;  {              
734                  if (!SetFileAttributes (name, attrs)) {      char file_ext[5];
735                      msg_box (NULL, _("Could not reset read-only state."),  
736                               _("GPG Error"), MB_ERR);      if (r_type)
737                      failed = 1;          *r_type = PGP_NONE;
738                  }      if (!strchr (fname, '.' ))
739              }          return "UNKNOWN";
740              else if (ans == IDNO) {  
741                  /*      strncpy (file_ext, fname + strlen (fname) - 4, 4);
742                  msg_box (NULL, _("All commands with write access to the keyring\n"      file_ext[4] = '\0';
743                                   "will be disabled."), _("GPG Information"), MB_INFO);      if (!stricmp (file_ext, ".asc"))
744                  */          return "ARMORED";
745                  failed = 1;      else if (!stricmp (file_ext, ".sig")) {
746              }          if (r_type)
747          }              *r_type = PGP_SIG;
748          if (my_access (name)) {          return "SIGNED";
749              if (showmsg)      }
750                  msg_box (NULL,      else if  (!stricmp (file_ext, ".gpg") ||
751                  _("You do not have file access to modify the contents of\n"                !stricmp (file_ext, ".pgp")) {
752                    "one or both of the selected keyrings.\n"          if (r_type)
753                    "\n"              *r_type = PGP_MESSAGE;
754                    "The keyrings are in a read-only state which is propably\n"          return "ENCRYPTED";
755                    "caused by another program which already opened the files.\n"),      }
756                     _("GPG Warning"), MB_WARN);      return "UNKNOWN";
757              failed = 2;  }
758          }  
759      }  
760      free_if_alloc (name);  /* Check if the device where file @fname is stored on, is write-protected. */
761      return failed;  static int
762  } /* gpg_check_permissions */  check_file_access (const char *fname, int mode)
763    {
764        HANDLE hd;
765  static int  
766  check_homedir (void)      if (!mode)
767  {                mode = FILE_SHARE_WRITE;
768      char * homedir = NULL;      hd = CreateFile (fname, GENERIC_WRITE, mode,
769      int yes = 0;                       NULL, OPEN_EXISTING, 0, NULL);
770        if (hd == INVALID_HANDLE_VALUE)
771      homedir = get_reg_entry_gpg ("HomeDir");          return -1;
772      if (!homedir)      CloseHandle (hd);
773          homedir = multi_gnupg_path ();      return 0;
774      if (!homedir)  }
775          homedir = m_strdup ("c:\\gnupg");  
776      if (homedir) {      
777          if (GetFileAttributes (homedir) == 0xFFFFFFFF) {  /* Check the device where the file @fname is stored on, is either
778              yes = log_box (_("Preferences"), MB_YESNO,     write-protected or if the file is already opened by another process
779                             _("%s does not exit.\n"     exclusively. And as a result, we cannot use the file for output. */
780                               "Do you want to create this directory?"), homedir);  int
781              if (yes == IDYES) {  gpg_check_file_permissions (const char *fname, int mode)
782                  if (CreateDirectory (homedir, NULL) == FALSE) {  {
783                      free_if_alloc (homedir);      int api_mode;
784                      return WPTERR_DIR_CREAT;      
785                  }      switch (mode) {
786              }      case 0: api_mode = FILE_SHARE_READ; break;
787              return WPTERR_DIR_OPEN;      case 1: api_mode = FILE_SHARE_WRITE; break;
788          }      case 2: api_mode = FILE_SHARE_WRITE|FILE_SHARE_READ; break;
789          free_if_alloc (homedir);      default: api_mode = FILE_SHARE_READ; break;
790      }      }
791      return 0;  
792  } /* check_homedir */      return check_file_access (fname, api_mode);
793    }
794    
795  int  
796  gnupg_check_homedir (void)  /* Check the file permissions of the public keyring.
797  {           If @showmsg is 1 output a message in case of errors.
798      char *homedir = NULL, *prog = NULL;     Return value: 1 if read-only attribute
799      int rc = 0, ec = 0;                   2 if file is opened by another process exclusively. */
800        int
801      rc = check_homedir ();  gpg_check_permissions (int showmsg)
802      if (rc)  {
803          return rc;      char *p = NULL;
804      if ((homedir = get_reg_entry_gpg ("HomeDir")) &&      char *name = NULL;
805          !(prog = get_reg_entry_gpg ("gpgProgram" ))) {      int failed = 0, ans=0, attrs=0;
806          prog = make_filename (homedir, "gpg", "exe");  
807          if (file_exist_check (prog) == 0) {      p = get_gnupg_path ();
808              rc = set_reg_entry_gpg ("gpgProgram", prog);      if (p && check_keyring (&p)) {
809              if (rc)          name = make_filename (p, "pubring", "gpg");
810                  goto fail;          if ((attrs=GetFileAttributes (name)) & FILE_ATTRIBUTE_READONLY) {
811          }              ans = msg_box (NULL,
812          free_if_alloc (homedir);                             _("The selected keyring has the read-only file\n"
813          free_if_alloc (prog);                               "attribute. In this state you do not have write\n"
814          return rc;                               "access. Do you want to remove the attribute?"),
815      }                       _("GPG Information"), MB_YESNO);
816      if ((prog = get_reg_entry_gpg ("gpgProgram"))              if (ans == IDYES) {
817          && file_exist_check (prog)) {                  attrs &= ~FILE_ATTRIBUTE_READONLY;
818          free_if_alloc (prog);                  if (!SetFileAttributes (name, attrs)) {
819          homedir = get_reg_entry_gpg ("HomeDir");                      msg_box (NULL, _("Could not reset read-only state."),
820          if (!homedir) {                               _("GPG Error"), MB_ERR);
821              rc = WPTERR_GENERAL;                      failed = 1;
822              goto fail;                  }
823          }              }
824          prog = make_filename (homedir, "gpg", "exe");              else if (ans == IDNO) {
825          if (file_exist_check (prog) == 0) {                  /* All commands with write access will be disabled. */
826              rc = set_reg_entry_gpg ("gpgProgram", prog);                  failed = 1;
827              if (rc)              }
828                  goto fail;          }
829              free_if_alloc (prog);          if (gpg_check_file_permissions (name, 1)) {
830              return rc;              if (showmsg)
831          }                  msg_box (NULL,
832      }                  _("You do not have file access to modify the contents of\n"
833                          "one or both of the selected keyrings.\n"
834      /* Change the return code if homedir doesn't exist or if the program                    "\n"
835         doesn't exist. Note that exist_checks return 0 to suggest existance. */                    "The keyrings are in a read-only state which is propably\n"
836      if ((!homedir || dir_exist_check (homedir)))                    "caused by another program which already opened the files.\n"),
837          rc = WPTERR_GENERAL;                     _("GPG Warning"), MB_WARN);
838                    failed = 2;
839  fail:          }
840      free_if_alloc (homedir);      }
841      free_if_alloc (prog);      free_if_alloc (p);
842      return rc;      free_if_alloc (name);
843  } /* gnupg_check_homedir */      return failed;
844    }
845    
846  int  
847  gnupg_copy_keyrings (void)  /* Check the GPG home dir. First try to read the 'HomeDir' registry entry,
848  {     then check for $APPDATA\gnupg. Create the dir if it does not exists. */
849      const char * pring, * sring;  int
850      char * file = NULL, * path = NULL;  gnupg_check_homedir (void)
851      int id = 0, rc = 0;  {      
852      HWND hwnd;      char *homedir;
853            int val;
854      path = get_gnupg_path ();      int rc = 0;
855      if (!path)  
856          return WPTERR_GENERAL;      homedir = get_reg_entry_gpg (GPG_REG_HOME);
857      hwnd = GetDesktopWindow ();      if (!homedir)
858            homedir = multi_gnupg_path (0);
859      pring = get_filename_dlg (hwnd, FILE_OPEN, _("Please choose your public keyring"),      if (homedir) {
860                                _("GPG Keyrings (*.gpg)\0*.gpg\0\0"),NULL);          if (GetFileAttributes (homedir) == 0xFFFFFFFF) {
861      if (!pring) {              val = log_box (_("Preferences"), MB_YESNO,
862          msg_box (hwnd, _("No keyring was chosen. Exit."), _("WinPT Error"), MB_ERR);                             _("%s does not exit.\n"
863          free_if_alloc (path);                               "Do you want to create this directory?"), homedir);
864          return WPTERR_GENERAL;              if (val == IDYES) {
865      }                  if (!CreateDirectory (homedir, NULL))
866      file = make_filename (path, "pubring", "gpg");                      rc = WPTERR_DIR_CREAT;
867      if (file_exist_check (file) == 0) {              }
868          id = msg_box (hwnd, _("Overwrite old public keyring?"), "WinPT", MB_INFO|MB_YESNO);              else
869          if (id == IDNO)                  rc = WPTERR_DIR_OPEN;
870              goto fail;          }
871      }          free_if_alloc (homedir);
872      if (!CopyFile (pring, file, FALSE)) {      }
873          msg_box (hwnd, _("Could not copy file."), _("WinPT Error"), MB_ERR);      return rc;
874          rc = WPTERR_FILE_READ;  }
875          goto fail;  
876      }  
877      free_if_alloc (file);  int
878    gnupg_copy_keyrings (void)
879      sring = get_filename_dlg (hwnd, FILE_OPEN, _("Please choose your secret keyring"),  {
880                                _("GPG Keyrings (*.gpg)\0*.gpg\0\0"), NULL);      const char *pring, *sring;
881      if (!sring) {      char *file = NULL, *path;
882          msg_box( NULL, _("No keyring was chosen. Exit."), _("WinPT Error"), MB_ERR );      int id, rc = 0;
883          return WPTERR_GENERAL;      HWND hwnd;
884      }      
885      file = make_filename (path, "secring", "gpg");      path = get_gnupg_path ();
886      if (file_exist_check (file) == 0) {      if (!path)
887          id = msg_box (hwnd, _("Overwrite old secret keyring?"), "WinPT", MB_INFO|MB_YESNO);          return WPTERR_GENERAL;
888          if( id == IDNO )      hwnd = GetDesktopWindow ();
889              goto fail;  
890      }      pring = get_fileopen_dlg (hwnd, _("Please choose your Public Keyring"),
891      if (!CopyFile (sring, file, FALSE)) {                                "GPG Keyrings (*.gpg)\0*.gpg\0\0", NULL);
892          msg_box( NULL, _("Could not copy file."), _("WinPT Error"), MB_ERR);      if (!pring) {
893          rc = WPTERR_FILE_READ;          msg_box (hwnd, _("No keyring was chosen. Exit."),
894      }                   _("WinPT Error"), MB_ERR);
895            free_if_alloc (path);
896  fail:          return WPTERR_GENERAL;
897      free_if_alloc (file);      }
898      free_if_alloc (path);      file = make_filename (path, "pubring", "gpg");
899      return rc;      if (file_exist_check (file) == 0) {
900  } /* gnupg_import_keyrings */          id = msg_box (hwnd, _("Overwrite old public keyring?"),
901                          "WinPT", MB_INFO|MB_YESNO);
902            if (id == IDNO)
903  void              goto fail;
904  gnupg_backup_options (void)      }
905  {      if (!CopyFile (pring, file, FALSE)) {
906      char *cfgfile = NULL;          msg_box (hwnd, _("Could not copy public keyring."),
907      char bak[512];                   _("WinPT Error"), MB_ERR);
908            rc = WPTERR_FILE_READ;
909      cfgfile = get_gnupg_cfgfile ();          goto fail;
910      if (cfgfile == NULL)      }
911          return;      free_if_alloc (file);
912      _snprintf (bak, DIM (bak)-1, "%s.bak", cfgfile);  
913      CopyFile (cfgfile, bak, FALSE);      sring = get_fileopen_dlg (hwnd, _("Please choose your Secret Keyring"),
914      free_if_alloc (cfgfile);                                "GPG Keyrings (*.gpg)\0*.gpg\0\0", NULL);
915  } /* gnupg_backup_options */      if (!sring) {
916            msg_box (NULL, _("No keyring was chosen. Exit."),
917                     _("WinPT Error"), MB_ERR);
918            return WPTERR_GENERAL;
919  static int      }
920  backup_one_file (const char * srcpath, const char * srcn,      file = make_filename (path, "secring", "gpg");
921                   const char * dstpath, const char * dstn)      if (file_exist_check (file) == 0) {
922  {          id = msg_box (hwnd, _("Overwrite old secret keyring?"),
923      char * src, * dst;                        "WinPT", MB_INFO|MB_YESNO);
924      BOOL rc;          if (id == IDNO)
925                goto fail;
926      src = make_filename (srcpath, srcn, "gpg");      }
927      if (!src)      if (!CopyFile (sring, file, FALSE)) {
928          BUG (NULL);          msg_box (NULL, _("Could not copy secret keyring."), _("WinPT Error"), MB_ERR);
929      dst = make_filename (dstpath, dstn, "gpg");          rc = WPTERR_FILE_READ;
930      if (!dst)      }
931          BUG (NULL);  
932      rc = CopyFile (src, dst, FALSE);  fail:
933      free_if_alloc (src);      free_if_alloc (file);
934      free_if_alloc (dst);      free_if_alloc (path);
935      if (!rc)      return rc;
936      {  }
937          log_box (_("Backup"), MB_ERR, _("Backup keyring \"%s\" failed"), srcn);  
938          return WPTERR_GENERAL;  
939      }  /* Backup the gpg.conf file. */
940      return 0;  void
941  } /* backup_one_file */  gnupg_backup_options (void)
942    {
943        char *cfgfile;
944  static int      char bak[MAX_PATH+32];
945  check_keyring (char ** r_path)  
946  {      cfgfile = get_gnupg_cfgfile ();
947      char * p;      if (!cfgfile)
948      char * opt, * name;          return;
949        _snprintf (bak, DIM (bak)-1, "%s.bak", cfgfile);
950      if (!*r_path)      CopyFile (cfgfile, bak, FALSE);
951          return 0;      free_if_alloc (cfgfile);
952      p = make_filename (*r_path, "pubring", "gpg");  }
953      if (!p || get_file_size (p) > 0)  
954          return 0;  
955    static int
956      opt = get_gnupg_cfgfile ();  backup_one_file (const char *srcpath, const char *srcn,
957      if (!opt)                   const char *dstpath, const char *dstn)
958          BUG (0);  {
959      name = get_gnupg_keyring_from_options (opt, 1);      char *src, *dst;
960      free_if_alloc (opt);      BOOL rc;
961      free_if_alloc (p);  
962      if (!name)      src = make_filename (srcpath, srcn, "gpg");
963          return 0;      dst = make_filename (dstpath, dstn, "gpg");
964      p = strrchr (name, '\\');      rc = CopyFile (src, dst, FALSE);
965      if (!p)      free_if_alloc (src);
966      {      free_if_alloc (dst);
967          free_if_alloc (name);      if (!rc) {
968          return 0;                log_box (_("Backup"), MB_ERR, _("Backup keyring \"%s\" failed"), srcn);
969      }          return WPTERR_GENERAL;
970      free_if_alloc (*r_path);      }
971      *r_path = new char [strlen (name)+1];      return 0;
972      memset (*r_path, 0, strlen (name));  }
973      strncpy (*r_path, name, (p-name));  
974      free_if_alloc (name);  
975      return 1;  /* Figure out first public keyring which is not empty.
976  }     Return value: 1 on success. */
977    static int
978    check_keyring (char **r_path)
979  static char*  {
980  get_backup_name (const char *templ)      char *p;
981  {      char *opt;
982      struct tm *tm;      char *name;
983      char *p;  
984        if (!*r_path)
985      time_t t = time (NULL);          return 0;
986      tm = localtime (&t);      p = make_filename (*r_path, "pubring", "gpg");
987      p = new char [strlen (templ) + 8 + 1];      if (get_file_size (p) <= 0)
988      if (!p)          return 0;
989          BUG (0);  
990      sprintf (p, "%s-%d", templ, tm->tm_wday % 3);      opt = get_gnupg_cfgfile ();
991      return p;      if (!opt)
992  }          BUG (0);
993        name = get_keyring_from_conf (opt, 1);
994        free_if_alloc (opt);
995  void      free_if_alloc (p);
996  gnupg_backup_keyrings (void)      if (!name)
997  {          return 0;
998      char *srcpath = NULL, *dstpath = NULL;      p = strrchr (name, '\\');
999      char *name=NULL;      if (!p) {
1000      int rc, bakmode=0;          free_if_alloc (name);
1001            return 0;      
1002      if (!reg_prefs.auto_backup)      }
1003          return;      free_if_alloc (*r_path);
1004      bakmode = reg_prefs.backup.mode;      *r_path = new char [strlen (name)+1];
1005      srcpath =  get_gnupg_path ();      memset (*r_path, 0, strlen (name));
1006      check_keyring (&srcpath);      strncpy (*r_path, name, (p-name));
1007      if (bakmode == 1) {      free_if_alloc (name);
1008          dstpath = get_gnupg_path ();      return 1;
1009          check_keyring (&dstpath);  }
1010      }  
1011      else if (bakmode == 2) {  
1012          char * tmpfile;  /* Return a temp name based on the day of the week. */
1013          FILE * fp;  static char*
1014    get_backup_name (const char *templ)
1015          dstpath = m_strdup (reg_prefs.backup.path);  {
1016          if (!dstpath)      struct tm *tm;
1017              BUG (0);      const char *fmt;
1018          tmpfile = make_filename (reg_prefs.backup.path, "test", "tmp");      char *p;
1019          fp = fopen (tmpfile, "wb");      time_t t;
1020          if (!fp)  
1021              rc = log_box (_("Backup"), MB_WARN|MB_RETRYCANCEL, _("The backup drive '%s' does not seems to accessable.\n"      t = time (NULL);
1022                                                                   "Please insert/check the drive to continue."), dstpath);      tm = localtime (&t);
1023          else {      fmt = "%s-%d";
1024              rc = 0;      p = new char [strlen (templ) + strlen (fmt) + 8 + 1];
1025              fclose (fp);      if (!p)
1026              unlink (tmpfile);          BUG (0);
1027          }      sprintf (p, fmt, templ, tm->tm_wday % 3);
1028          free_if_alloc (tmpfile);      return p;
1029          if (!fp || rc == IDCANCEL)  }
1030              return;  
1031      }  
1032      else {  /* Make backups of all keyrings. The public key ring is rotated like
1033          log_box (_("Backup"), MB_ERR, _("Invalid backup mode %d"), bakmode);     this pubring-%d.gpg.
1034          return;     If @auto_backup is false, no action is performed.
1035      }     @include_secr indicated if the backup includes the secret keyring. */
1036      name = get_backup_name ("pubring-bak");  void
1037      rc = backup_one_file (srcpath, "pubring", dstpath, name);  gnupg_backup_keyrings (int auto_backup, int backup_mode, int include_secr)
1038      if (!rc)  {
1039          rc = backup_one_file (srcpath, "secring", dstpath, "secring-bak");      char *srcpath, *dstpath;
1040      free_if_alloc (name);      char *name;
1041      free_if_alloc (srcpath);      int rc;
1042      free_if_alloc (dstpath);  
1043  } /* gnupg_backup_keyrings */      if (!auto_backup)
1044            return;
1045        srcpath = get_gnupg_path ();
1046  void      check_keyring (&srcpath);
1047  gnupg_display_error (void)      if (backup_mode == 1) {
1048  {                /* If the backup mode uses the home directory the source
1049      char tmpath[512], * errstr;             and destination folder will be the same. */
1050      size_t size = 0;          dstpath = get_gnupg_path ();
1051      FILE * fp;          check_keyring (&dstpath);
1052        }
1053      GetTempPath (sizeof tmpath - 32, (tmpath));      else if (backup_mode == 2) {
1054      strcat (tmpath, "gpg_stderr");          char *tmpfile;
1055      size = get_file_size (tmpath);          FILE *fp;
1056      if (file_exist_check (tmpath) || size <= 0)  
1057          return;          dstpath = m_strdup (reg_prefs.backup.path);
1058      fp = fopen( tmpath, "rb" );          tmpfile = make_filename (reg_prefs.backup.path, "test", "tmp");
1059      if (!fp) {          fp = fopen (tmpfile, "wb");
1060          msg_box( NULL, _("No GPG error description available."), _("GPG Error"), MB_INFO );          if (!fp)
1061          return;              rc = log_box (_("Backup"), MB_WARN|MB_RETRYCANCEL,
1062      }                            _("The backup drive '%s' does not seems to be accessable.\n"
1063      errstr = new char[size+1];                              "Please insert/check the drive to continue."), dstpath);
1064      if (!errstr)          else {
1065          BUG (0);              rc = 0;
1066      fread (errstr, 1, size, fp);              fclose (fp);
1067      errstr[size] = '\0';              DeleteFile (tmpfile);
1068      fclose (fp);          }
1069      msg_box (NULL, errstr, _("GPG Error"), MB_INFO);          free_if_alloc (tmpfile);
1070      free_if_alloc (errstr);          if (!fp || rc == IDCANCEL) {
1071  } /* gnupg_display_error */              free_if_alloc (dstpath);
1072                free_if_alloc (srcpath);
1073                return;
1074  int          }
1075  gnupg_access_keyring (int _pub)      }
1076  {      else {
1077      int rc = 0;          log_box (_("Backup"), MB_ERR, _("Invalid backup mode %d"), backup_mode);
1078      char * name = get_gnupg_keyring (_pub, 1);          free_if_alloc (srcpath);
1079      if (file_exist_check (name))          return;
1080          rc = -1;      }
1081      free_if_alloc (name);      name = get_backup_name ("pubring-bak");
1082      return rc;      rc = backup_one_file (srcpath, "pubring", dstpath, name);
1083  }      if (!rc && include_secr)
1084            rc = backup_one_file (srcpath, "secring", dstpath, "secring-bak");
1085        free_if_alloc (name);
1086        free_if_alloc (srcpath);
1087        free_if_alloc (dstpath);
1088    }
1089    
1090    
1091    /* check that the requested GPG keyring exist and.
1092       Return value: 0 for success. */
1093    int
1094    gnupg_access_keyring (int _pub)
1095    {
1096        int rc = 0;
1097        char *name = get_gnupg_keyring (_pub, 1);
1098        if (!name || file_exist_check (name))
1099            rc = -1;
1100        free_if_alloc (name);
1101        return rc;
1102    }
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