/[winpt]/trunk/Src/wptGPGME.cpp
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revision 2 by twoaday, Mon Jan 31 11:02:21 2005 UTC revision 262 by twoaday, Sat Sep 30 10:24:34 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    int
51      rcs.kr_reload = rcs.kr_update = 1;  keycache_not_available (void)
52      rcs.tr_update = 1;  {
53      DialogBoxParam( glob_hinst, (LPCSTR)IDD_WINPT_KEYCACHE, dlg,                                              return pub == NULL;
54                      keycache_dlg_proc, (LPARAM)&rcs );  }
55  } /* keycache_reload */  
56    /* Release both key cache objects. If @cleanup is 1,
57  void     also release other global structs. */
58  keycache_release (void)  void
59  {  keycache_release (int cleanup)
60      int n = gpgme_keycache_count (pub);  {
61      char tmpbuf[64];      char tmpbuf[64];
62        int n = gpg_keycache_get_size (pub);
63      sprintf (tmpbuf, "%d", n);  
64      set_reg_key (HKEY_CURRENT_USER, "Software\\WinPT", "nKeys", tmpbuf);      /* XXX: update the value when the cache has changed. */
65        sprintf (tmpbuf, "%d", n);
66      if (pub) {      set_reg_key (HKEY_CURRENT_USER, "Software\\WinPT", "nKeys", tmpbuf);
67          gpgme_keycache_release( pub );  
68          pub = NULL;      if (pub) {
69      }          gpg_keycache_release (pub);
70      if (sec) {          pub = NULL;
71          gpgme_keycache_release( sec );      }
72          sec = NULL;      if (sec) {
73      }          gpg_keycache_release (sec);
74  } /* keycache_release */          sec = NULL;
75        }
76        if (cleanup)
77  gpgme_error_t          safe_free (gpg_secring);
78  keycache_init( const char *pubring, const char * secring )  }
79  {  
80      struct progress_filter_s pfx;  
81      gpgme_error_t err;  /* Update the key with the keyid @keyid in the key cache.
82      int val = 0;     If @is_sec is 1, the secret key cache is used. */
83      char * p;  gpgme_error_t
84    keycache_update (int is_sec, const char *keyid)
85      if (reload) {  {
86          keycache_release ();      gpg_keycache_t ctx = pub;
87          reload = 0;      gpgme_error_t err;
88      }  
89      p = get_reg_entry (HKEY_CURRENT_USER, "Software\\WinPT", "nKeys");      if (is_sec)
90      if (p && *p != ' ')          ctx = sec;
91      {      err = gpg_keycache_update_key (ctx, is_sec, pub, keyid);
92          val = atoi (p);      if (is_sec)
93          free_if_alloc (p);          gpg_keycache_prepare_single (ctx, keyid, NULL, gpg_secring);
94          memset (&pfx, 0, sizeof pfx);      return err;
95      }  }
96    
97      err = gpgme_keycache_new (&pub);  
98      if (err)  /* Initialize both cache contexts. Use @pubring for the public
99          return err;     keyring and @secring for the secret keyring. */
100      if (val != 0)  gpgme_error_t
101          gpgme_keycache_set_cb (pub, progress_callback, &pfx, val);  keycache_init (const char *pubring, const char *secring)
102      err = gpgme_keycache_new (&sec);  {
103      if (!err)      struct progress_filter_s pfx;
104          err = gpgme_keycache_init (pub, NULL, 0);      gpgme_error_t err;
105      if (!err)      int val = 0;
106          err = gpgme_keycache_init( sec, NULL, 1 );      char *p;
107      if( !err && pubring && *pubring )  
108          err = gpgme_keycache_prepare( pub, pubring, NULL );      if (secring != NULL) {
109      if( !err && secring && * secring )          free_if_alloc (gpg_secring);
110          err = gpgme_keycache_prepare( sec, NULL, secring );          gpg_secring = get_gnupg_keyring (0, NO_STRICT);
111      if (!err)      }
112          gpgme_keycache_sync (pub, sec);      
113      if (val != 0)      p = get_reg_entry (HKEY_CURRENT_USER, "Software\\WinPT", "nKeys");
114          progress_cleanup (&pfx);      if (p && *p != ' ') {
115      return err;          val = atoi (p);
116  } /* keycache_init */          free_if_alloc (p);      
117        }
118    
119  void      memset (&pfx, 0, sizeof (pfx));
120  keycache_set_reload( int yes )      keycache_release (0); /* Release old contexts first. */
121  {  
122      reload = yes;      err = gpg_keycache_new (&pub);
123  } /* keycache_set_reload */      if (err)
124            return err;
125        if (val != 0)
126  int          gpg_keycache_set_cb (pub, progress_callback, &pfx, val);
127  keycache_get_reload( void )      err = gpg_keycache_new (&sec);
128  {      if (!err)
129      return reload;          err = gpg_keycache_init (pub, NULL, 0);
130  } /* keycache_get_reload */      if (!err)
131            err = gpg_keycache_init (sec, NULL, 1);
132        if (!err && pubring && *pubring)
133  gpgme_keycache_t          err = gpg_keycache_prepare (pub, pubring, NULL);
134  keycache_get_ctx( int is_pub )      if (!err && secring && * secring)
135  {          err = gpg_keycache_prepare (sec, NULL, secring);
136      return is_pub? pub : sec;      if (!err)
137  } /* keycache_get_ctx */          gpg_keycache_sync (pub, sec);
138        if (val != 0)
139            progress_cleanup (&pfx);
140  static int      return err;
141  get_key( const char *keyid, gpgme_key_t *r_key, int secret )  }
142  {  
143      gpgme_keycache_t cache;  
144      gpgme_error_t err;  /* Return the public cache context if @is_pub is set
145      int mode = secret? KEYCACHE_PRV : KEYCACHE_PUB;     the secre cache context otherwise. */
146    gpg_keycache_t
147      if( !keyid )  keycache_get_ctx (int is_pub)
148          return WPTERR_GENERAL;  {
149      if( r_key )      gpg_keycache_t ctx;
150          *r_key = NULL;  
151      cache = keycache_get_ctx( mode );      ctx = is_pub? pub : sec;
152      if( !cache )      if (!ctx)
153          BUG( NULL );          BUG (0);
154      err = gpgme_keycache_find_key( cache, keyid, 0, r_key );      return ctx;
155      if( err )  }
156          return WPTERR_GENERAL;  
157      return 0;  
158  } /* get_key */  /* Get the GPG key with keyid @keyid from the cache. Return it
159       in @r_key on success. */
160    static gpgme_error_t
161  static int  get_key_from_cache (const char *keyid, int secret, gpgme_key_t *r_key,
162  get_key2( const char * keyid, gpgme_key_t * r_key, int secret )                      struct keycache_s **c)
163  {  {
164      gpg_iobuf_t inp;      gpg_keycache_t cache;
165      char * p;      gpgme_error_t err;
166      int rc;      int mode = secret? KEYCACHE_PRV : KEYCACHE_PUB;
167    
168      p = get_gnupg_keyring (1, !NO_STRICT);      if (!keyid)
169      if( !p )          return gpg_error (GPG_ERR_INV_VALUE);
170          BUG( NULL );      if (r_key)
171            *r_key = NULL;
172      inp = gpg_iobuf_open( p );      cache = keycache_get_ctx (mode);
173      if( !inp ) {      if (!c)
174          const char *s = winpt_strerror( WPTERR_FILE_OPEN );          err = gpg_keycache_find_key (cache, keyid, 0, r_key);
175          log_box( _("WinPT Error"), 0, "%s: %s", p, s );      else
176          free_if_alloc( p );          err = gpg_keycache_find_key2 (cache, keyid, 0, r_key, c);
177          return NULL;      return err;
178      }  }
179      gpg_iobuf_ioctl( inp, 3, 1, NULL ); /* disable cache */  
180      rc = gpgme_getkey_bykeyid( inp, keyid, r_key );  
181    /* Release the internal key structure.
182      gpg_iobuf_close( inp );     If allocated is 0, assume fixed cache item. */
183      free_if_alloc( p );  void
184      return rc;  winpt_release_pubkey (winpt_key_s *k)
185  } /* get_key2 */  {
186        /*log_box ("debug", 0, "alloc %d", k->allocated);*/
187        if (!k->allocated)
188  int          return;
189  get_pubkey( const char *keyid, gpgme_key_t *ret_key )      gpg_keycache_item_release (k->ext);
190  {      k->ext = NULL;
191      int rc = 0;      k->allocated = 0;
192    }
193      if( pub && sec )  
194          rc = get_key( keyid, ret_key, 0 );  
195      else  /* Search the public key with @keyid as the keyid in the cache and
196          rc = get_key2( keyid, ret_key, 0 );     return the item in @k. */
197      return rc;  gpgme_error_t
198  } /* get_pubkey */  winpt_get_pubkey (const char *keyid, winpt_key_s *k)
199    {
200        gpgme_error_t err = gpg_error (GPG_ERR_NO_ERROR);
201  int      
202  get_seckey( const char *keyid, gpgme_key_t *ret_skey )      if (pub)
203  {          err = get_key_from_cache (keyid, 0, &k->ctx, &k->ext);
204      int rc = 0;      else
205            err = gpg_keycache_fetch_key (keyid, 0, &k->ctx, &k->ext);
206      if( pub && sec )      if (err)
207          rc = get_key( keyid, ret_skey, 1 );          return err;
208      else      k->is_v3 = k->ctx->subkeys->pubkey_algo == GPGME_PK_RSA &&
209          rc = get_key2( keyid, ret_skey, 1 );                  strlen (k->ctx->subkeys->fpr) == 32;
210      return rc;      k->is_protected = k->ext->gloflags.is_protected;
211  } /* get_seckey */      k->keyid = k->ctx->subkeys->keyid+8;
212        k->uid = k->ext->uids->uid;
213        k->allocated = pub? 0 : 1;
214  int      return 0;
215  count_insecure_elgkeys (void)  }
216  {  
217      gpgme_keycache_t pc;  
218      gpgme_key_t key;  gpgme_error_t
219      int n=0;  winpt_get_seckey (const char *keyid, winpt_key_s *k)
220    {
221      pc = keycache_get_ctx (1);      gpgme_error_t err;
222      if (!pc)  
223          BUG (0);      if (sec)
224      while (!gpgme_keycache_next_key (pc, 0, &key)) {          err = get_key_from_cache (keyid, 1, &k->ctx, &k->ext);
225          if (gpgme_key_get_ulong_attr (key, GPGME_ATTR_ALGO, NULL, 0)      else
226              == GPGME_PK_ELG_ES)          err = gpg_keycache_fetch_key (keyid, 1, &k->ctx, &k->ext);
227              n++;      if (err)
228      }          return err;
229      gpgme_keycache_rewind (pc);      k->is_v3 = k->ctx->subkeys->pubkey_algo == GPGME_PK_RSA &&
230      return n;                  strlen (k->ctx->subkeys->fpr) == 32;
231  }      k->is_protected = k->ext->gloflags.is_protected;
232        k->keyid = k->ctx->subkeys->keyid+8;
233        k->uid = k->ext->uids->uid;
234        k->allocated = sec? 0 : 1;
235        return 0;
236    }
237    
238    
239    gpgme_error_t
240    get_pubkey (const char *keyid, gpgme_key_t *ret_key)
241    {
242        return get_key_from_cache (keyid, 0, ret_key, NULL);
243    }
244    
245    
246    gpgme_error_t
247    get_seckey (const char *keyid, gpgme_key_t *ret_skey)
248    {
249        return get_key_from_cache (keyid, 1, ret_skey, NULL);
250    }
251    
252    
253    
254    /* Map the signature summary in @sum to signature status table index.
255       Return value: index to table. */
256    static int
257    sigsum_to_index (gpgme_sigsum_t sum)
258    {
259        if (sum & GPGME_SIGSUM_RED)
260            return 2;
261        else if (sum & GPGME_SIGSUM_SIG_EXPIRED)
262            return 8;
263        else if (sum & GPGME_SIGSUM_KEY_REVOKED)
264            return 7;
265        else if (sum & GPGME_SIGSUM_KEY_EXPIRED)
266            return 6;
267        else if (sum & GPGME_SIGSUM_GREEN)
268            return 1;
269        else if (sum & GPGME_SIGSUM_KEY_MISSING)
270            return 3;
271        return 0;
272    }
273    
274    
275    /* Return a humand readable description for the signature status @sum.
276       Warning: this function does not consider the validity of the key. */
277    const char*
278    get_gpg_sigstat (gpgme_sigsum_t sum)
279    {
280        const char *gpg_sigstat[] = {
281            _("Error during verification process"),
282            _("The signature is good"),
283            _("The signature is BAD!"),
284            _("The signature could not be checked due to a missing key"),
285            _("No valid OpenPGP signature"),
286            _("Signature Error"),
287            _("Good signature (Expired Key)"),
288            _("Good signature (Revoked Key)"),
289            _("Good signature (Expired)"),
290            NULL
291        };
292        const unsigned int mask = 9;
293    
294        return gpg_sigstat[sigsum_to_index (sum) % mask];
295    }
296    
297    
298    /* Return true if at least one secret key is available. */
299    bool
300    secret_key_available (void)
301    {
302        if (!sec || gpg_keycache_get_size (sec) == 0)
303            return false;
304        return true;
305    }
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