/[winpt]/trunk/Src/wptGPGME.cpp
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revision 2 by twoaday, Mon Jan 31 11:02:21 2005 UTC revision 271 by twoaday, Sun Nov 5 08:57:45 2006 UTC
# Line 1  Line 1 
1  /* wptGPGME.cpp - WinPT GPGME interface  /* wptGPGME.cpp - WinPT GPGME interface
2   *      Copyright (C) 2001-2004 Timo Schulz   *      Copyright (C) 2001-2006 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   * You should have received a copy of the GNU General Public License
17   * along with WinPT; if not, write to the Free Software Foundation,   * along with WinPT; if not, write to the Free Software Foundation,
18   * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA   * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19   */   */
20    #ifdef HAVE_CONFIG_H
21  #include <sys/types.h>  #include <config.h>
22  #include <windows.h>  #endif
23    
24  #include "../resource.h"  #include <sys/types.h>
25  #include "wptNLS.h"  #include <windows.h>
26  #include "wptGPG.h"  
27  #include "wptErrors.h"  #include "resource.h"
28  #include "wptTypes.h"  #include "wptNLS.h"
29  #include "wptW32API.h"  #include "wptGPG.h"
30  #include "wptVersion.h"  #include "wptErrors.h"
31  #include "wptCommonCtl.h"  #include "wptTypes.h"
32  #include "wptContext.h"  #include "wptW32API.h"
33  #include "wptRegistry.h"  #include "wptVersion.h"
34  #include "wptDlgs.h"  #include "wptCommonCtl.h"
35    #include "wptContext.h"
36  #include "openpgp.h"  #include "wptRegistry.h"
37    #include "wptDlgs.h"
38  BOOL CALLBACK  keycache_dlg_proc (HWND dlg, UINT msg, WPARAM wparam, LPARAM lparam);  
39  void progress_cleanup (progress_filter_s * pfx);  #include "openpgp.h"
40    
41  static gpgme_keycache_t pub = NULL;  BOOL CALLBACK  keycache_dlg_proc (HWND dlg, UINT msg, WPARAM wparam, LPARAM lparam);
42  static gpgme_keycache_t sec = NULL;  void progress_cleanup (progress_filter_s * pfx);
43  static unsigned int reload = 0;  
44    /* Global GPG key cache contexts. */
45    static gpg_keycache_t pub = NULL;
46  void  static gpg_keycache_t sec = NULL;
47  keycache_reload (HWND dlg)  static char *gpg_secring = NULL;
48  {        
49      refresh_cache_s rcs = {0};  
50    /* Return 1 if no cache is available.
51      rcs.kr_reload = rcs.kr_update = 1;     This can be the case if WinPT were run in command line mode. */
52      rcs.tr_update = 1;  int
53      DialogBoxParam( glob_hinst, (LPCSTR)IDD_WINPT_KEYCACHE, dlg,                                          keycache_not_available (void)
54                      keycache_dlg_proc, (LPARAM)&rcs );  {
55  } /* keycache_reload */      return pub == NULL;
56    }
57  void  
58  keycache_release (void)  /* Release both key cache objects. If @cleanup is 1,
59  {     also release other global structs. */
60      int n = gpgme_keycache_count (pub);  void
61      char tmpbuf[64];  keycache_release (int cleanup)
62    {
63      sprintf (tmpbuf, "%d", n);      char tmpbuf[64];
64      set_reg_key (HKEY_CURRENT_USER, "Software\\WinPT", "nKeys", tmpbuf);      int n = gpg_keycache_get_size (pub);
65    
66      if (pub) {      /* XXX: update the value when the cache has changed. */
67          gpgme_keycache_release( pub );      _snprintf (tmpbuf, DIM (tmpbuf)-1, "%d", n);
68          pub = NULL;      set_reg_key (HKEY_CURRENT_USER, "Software\\WinPT", "nKeys", tmpbuf);
69      }  
70      if (sec) {      if (pub) {
71          gpgme_keycache_release( sec );          gpg_keycache_release (pub);
72          sec = NULL;          pub = NULL;
73      }      }
74  } /* keycache_release */      if (sec) {
75            gpg_keycache_release (sec);
76            sec = NULL;
77  gpgme_error_t      }
78  keycache_init( const char *pubring, const char * secring )      if (cleanup)
79  {          safe_free (gpg_secring);
80      struct progress_filter_s pfx;  }
81      gpgme_error_t err;  
82      int val = 0;  
83      char * p;  /* Update the key with the keyid @keyid in the key cache.
84       If @is_sec is 1, the secret key cache is used. */
85      if (reload) {  gpgme_error_t
86          keycache_release ();  keycache_update (int is_sec, const char *keyid)
87          reload = 0;  {
88      }      gpg_keycache_t ctx = pub;
89      p = get_reg_entry (HKEY_CURRENT_USER, "Software\\WinPT", "nKeys");      gpgme_error_t err;
90      if (p && *p != ' ')  
91      {      if (is_sec)
92          val = atoi (p);          ctx = sec;
93          free_if_alloc (p);      err = gpg_keycache_update_key (ctx, is_sec, pub, keyid);
94          memset (&pfx, 0, sizeof pfx);      if (is_sec)
95      }          gpg_keycache_prepare_single (ctx, keyid, NULL, gpg_secring);
96        return err;
97      err = gpgme_keycache_new (&pub);  }
98      if (err)  
99          return err;  
100      if (val != 0)  /* Initialize both cache contexts. Use @pubring for the public
101          gpgme_keycache_set_cb (pub, progress_callback, &pfx, val);     keyring and @secring for the secret keyring. */
102      err = gpgme_keycache_new (&sec);  gpgme_error_t
103      if (!err)  keycache_init (const char *pubring, const char *secring)
104          err = gpgme_keycache_init (pub, NULL, 0);  {
105      if (!err)      struct progress_filter_s pfx;
106          err = gpgme_keycache_init( sec, NULL, 1 );      gpgme_error_t err;
107      if( !err && pubring && *pubring )      int val = 0;
108          err = gpgme_keycache_prepare( pub, pubring, NULL );      char *p;
109      if( !err && secring && * secring )  
110          err = gpgme_keycache_prepare( sec, NULL, secring );      if (secring != NULL) {
111      if (!err)          free_if_alloc (gpg_secring);
112          gpgme_keycache_sync (pub, sec);          gpg_secring = get_gnupg_keyring (0, NO_STRICT);
113      if (val != 0)          log_debug ("keycache_init: secring path '%s'\r\n", gpg_secring);
114          progress_cleanup (&pfx);      }
115      return err;      
116  } /* keycache_init */      p = get_reg_entry (HKEY_CURRENT_USER, "Software\\WinPT", "nKeys");
117        if (p && *p != ' ') {
118            val = atoi (p);
119  void          free_if_alloc (p);      
120  keycache_set_reload( int yes )      }
121  {  
122      reload = yes;      memset (&pfx, 0, sizeof (pfx));
123  } /* keycache_set_reload */      keycache_release (0); /* Release old contexts first. */
124    
125        err = gpg_keycache_new (&pub);
126  int      if (err)
127  keycache_get_reload( void )          return err;
128  {      if (val != 0)
129      return reload;          gpg_keycache_set_cb (pub, progress_callback, &pfx, val);
130  } /* keycache_get_reload */      err = gpg_keycache_new (&sec);
131        if (!err)
132            err = gpg_keycache_init (pub, NULL, 0);
133  gpgme_keycache_t      if (!err)
134  keycache_get_ctx( int is_pub )          err = gpg_keycache_init (sec, NULL, 1);
135  {      if (!err && pubring && *pubring)
136      return is_pub? pub : sec;          err = gpg_keycache_prepare (pub, pubring, NULL);
137  } /* keycache_get_ctx */      if (!err && secring && * secring)
138            err = gpg_keycache_prepare (sec, NULL, secring);
139        if (!err)
140  static int          gpg_keycache_sync (pub, sec);
141  get_key( const char *keyid, gpgme_key_t *r_key, int secret )      if (val != 0)
142  {          progress_cleanup (&pfx);
143      gpgme_keycache_t cache;      return err;
144      gpgme_error_t err;  }
145      int mode = secret? KEYCACHE_PRV : KEYCACHE_PUB;  
146    
147      if( !keyid )  /* Return the public cache context if @is_pub is set
148          return WPTERR_GENERAL;     the secre cache context otherwise. */
149      if( r_key )  gpg_keycache_t
150          *r_key = NULL;  keycache_get_ctx (int is_pub)
151      cache = keycache_get_ctx( mode );  {
152      if( !cache )      gpg_keycache_t ctx;
153          BUG( NULL );  
154      err = gpgme_keycache_find_key( cache, keyid, 0, r_key );      ctx = is_pub? pub : sec;
155      if( err )      if (!ctx)
156          return WPTERR_GENERAL;          BUG (0);
157      return 0;      return ctx;
158  } /* get_key */  }
159    
160    
161  static int  /* Get the GPG key with keyid @keyid from the cache. Return it
162  get_key2( const char * keyid, gpgme_key_t * r_key, int secret )     in @r_key on success. */
163  {  static gpgme_error_t
164      gpg_iobuf_t inp;  get_key_from_cache (const char *keyid, int secret, gpgme_key_t *r_key,
165      char * p;                      struct keycache_s **c)
166      int rc;  {
167        gpg_keycache_t cache;
168      p = get_gnupg_keyring (1, !NO_STRICT);      gpgme_error_t err;
169      if( !p )      int mode = secret? KEYCACHE_PRV : KEYCACHE_PUB;
170          BUG( NULL );  
171        if (!keyid)
172      inp = gpg_iobuf_open( p );          return gpg_error (GPG_ERR_INV_VALUE);
173      if( !inp ) {      if (r_key)
174          const char *s = winpt_strerror( WPTERR_FILE_OPEN );          *r_key = NULL;
175          log_box( _("WinPT Error"), 0, "%s: %s", p, s );      cache = keycache_get_ctx (mode);
176          free_if_alloc( p );      if (!c)
177          return NULL;          err = gpg_keycache_find_key (cache, keyid, 0, r_key);
178      }      else
179      gpg_iobuf_ioctl( inp, 3, 1, NULL ); /* disable cache */          err = gpg_keycache_find_key2 (cache, keyid, 0, r_key, c);
180      rc = gpgme_getkey_bykeyid( inp, keyid, r_key );      return err;
181    }
182      gpg_iobuf_close( inp );  
183      free_if_alloc( p );  
184      return rc;  /* Release the internal key structure.
185  } /* get_key2 */     If allocated is 0, assume fixed cache item. */
186    void
187    winpt_release_pubkey (winpt_key_s *k)
188  int  {
189  get_pubkey( const char *keyid, gpgme_key_t *ret_key )      /*log_box ("debug", 0, "alloc %d", k->allocated);*/
190  {      if (!k->allocated)
191      int rc = 0;          return;
192        gpg_keycache_item_release (k->ext);
193      if( pub && sec )      k->ext = NULL;
194          rc = get_key( keyid, ret_key, 0 );      k->allocated = 0;
195      else  }
196          rc = get_key2( keyid, ret_key, 0 );  
197      return rc;  
198  } /* get_pubkey */  /* Search the public key with @keyid as the keyid in the cache and
199       return the item in @k. */
200    gpgme_error_t
201  int  winpt_get_pubkey (const char *keyid, winpt_key_s *k)
202  get_seckey( const char *keyid, gpgme_key_t *ret_skey )  {
203  {      gpgme_error_t err = gpg_error (GPG_ERR_NO_ERROR);
204      int rc = 0;      
205        if (pub)
206      if( pub && sec )          err = get_key_from_cache (keyid, 0, &k->ctx, &k->ext);
207          rc = get_key( keyid, ret_skey, 1 );      else
208      else          err = gpg_keycache_fetch_key (keyid, 0, &k->ctx, &k->ext);
209          rc = get_key2( keyid, ret_skey, 1 );      if (err)
210      return rc;          return err;
211  } /* get_seckey */      k->is_v3 = k->ctx->subkeys->pubkey_algo == GPGME_PK_RSA &&
212                    strlen (k->ctx->subkeys->fpr) == 32;
213        k->is_protected = k->ext->gloflags.is_protected;
214  int      k->keyid = k->ctx->subkeys->keyid+8;
215  count_insecure_elgkeys (void)      k->uid = k->ext->uids->uid;
216  {      k->allocated = pub? 0 : 1;
217      gpgme_keycache_t pc;      return 0;
218      gpgme_key_t key;  }
219      int n=0;  
220    
221      pc = keycache_get_ctx (1);  gpgme_error_t
222      if (!pc)  winpt_get_seckey (const char *keyid, winpt_key_s *k)
223          BUG (0);  {
224      while (!gpgme_keycache_next_key (pc, 0, &key)) {      gpgme_error_t err;
225          if (gpgme_key_get_ulong_attr (key, GPGME_ATTR_ALGO, NULL, 0)  
226              == GPGME_PK_ELG_ES)      if (sec)
227              n++;          err = get_key_from_cache (keyid, 1, &k->ctx, &k->ext);
228      }      else
229      gpgme_keycache_rewind (pc);          err = gpg_keycache_fetch_key (keyid, 1, &k->ctx, &k->ext);
230      return n;      if (err)
231  }          return err;
232        k->is_v3 = k->ctx->subkeys->pubkey_algo == GPGME_PK_RSA &&
233                    strlen (k->ctx->subkeys->fpr) == 32;
234        k->is_protected = k->ext->gloflags.is_protected;
235        k->keyid = k->ctx->subkeys->keyid+8;
236        k->uid = k->ext->uids->uid;
237        k->allocated = sec? 0 : 1;
238        return 0;
239    }
240    
241    
242    gpgme_error_t
243    get_pubkey (const char *keyid, gpgme_key_t *ret_key)
244    {
245        return get_key_from_cache (keyid, 0, ret_key, NULL);
246    }
247    
248    
249    gpgme_error_t
250    get_seckey (const char *keyid, gpgme_key_t *ret_skey)
251    {
252        return get_key_from_cache (keyid, 1, ret_skey, NULL);
253    }
254    
255    
256    /* Map the signature summary in @sum to signature status table index.
257       Return value: index to table. */
258    static int
259    sigsum_to_index (gpgme_sigsum_t sum)
260    {
261        if (sum & GPGME_SIGSUM_RED)
262            return 2;
263        else if (sum & GPGME_SIGSUM_SIG_EXPIRED)
264            return 8;
265        else if (sum & GPGME_SIGSUM_KEY_REVOKED)
266            return 7;
267        else if (sum & GPGME_SIGSUM_KEY_EXPIRED)
268            return 6;
269        else if (sum & GPGME_SIGSUM_GREEN)
270            return 1;
271        else if (sum & GPGME_SIGSUM_KEY_MISSING)
272            return 3;
273        return 0;
274    }
275    
276    
277    /* Return a humand readable description for the signature status @sum.
278       Warning: this function does not consider the validity of the key. */
279    const char*
280    get_gpg_sigstat (gpgme_sigsum_t sum)
281    {
282        const char *gpg_sigstat[] = {
283            _("Error during verification process"),
284            _("The signature is good"),
285            _("The signature is BAD!"),
286            _("The signature could not be checked due to a missing key"),
287            _("No valid OpenPGP signature"),
288            _("Signature Error"),
289            _("Good signature (Expired Key)"),
290            _("Good signature (Revoked Key)"),
291            _("Good signature (Expired)"),
292            NULL
293        };
294        const unsigned int mask = 9;
295    
296        return gpg_sigstat[sigsum_to_index (sum) % mask];
297    }
298    
299    
300    /* Return true if at least one secret key is available. */
301    bool
302    secret_key_available (void)
303    {
304        if (!sec || gpg_keycache_get_size (sec) == 0)
305            return false;
306        return true;
307    }
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