/[winpt]/trunk/Src/wptGPGME.cpp
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revision 20 by twoaday, Wed Jul 27 11:17:22 2005 UTC revision 211 by twoaday, Sun May 7 12:36:48 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) 2001-2005 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    /* Reload the key cache. */
51      rcs.kr_reload = rcs.kr_update = 1;  void
52      /*rcs.tr_update = 1;*/  keycache_reload (HWND dlg)
53      DialogBoxParam( glob_hinst, (LPCSTR)IDD_WINPT_KEYCACHE, dlg,                                          {      
54                      keycache_dlg_proc, (LPARAM)&rcs );      refresh_cache_s rcs;
55  } /* keycache_reload */  
56        memset (&rcs, 0, sizeof rcs);
57  void      rcs.kr_reload = rcs.kr_update = 1;
58  keycache_release (void)      rcs.tr_update = 0;
59  {      DialogBoxParam (glob_hinst, (LPCSTR)IDD_WINPT_KEYCACHE, dlg,                                        
60      int n = gpgme_keycache_count (pub);                      keycache_dlg_proc, (LPARAM)&rcs);
61      char tmpbuf[64];  }
62    
63      sprintf (tmpbuf, "%d", n);  
64      set_reg_key (HKEY_CURRENT_USER, "Software\\WinPT", "nKeys", tmpbuf);  /* Release both key cache objects. If @cleanup is 1,
65       also release other global structs. */
66      if (pub) {  void
67          gpgme_keycache_release( pub );  keycache_release (int cleanup)
68          pub = NULL;  {
69      }      int n = gpg_keycache_get_size (pub);
70      if (sec) {      char tmpbuf[64];
71          gpgme_keycache_release( sec );  
72          sec = NULL;      /* XXX: update the value when the cache has changed. */
73      }      sprintf (tmpbuf, "%d", n);
74  } /* keycache_release */      set_reg_key (HKEY_CURRENT_USER, "Software\\WinPT", "nKeys", tmpbuf);
75    
76        if (pub) {
77  gpgme_error_t          gpg_keycache_release (pub);
78  keycache_update (int is_sec, const char *keyid)          pub = NULL;
79  {      }
80      gpgme_keycache_t ctx = pub;      if (sec) {
81      if (is_sec)          gpg_keycache_release (sec);
82          ctx = sec;          sec = NULL;
83      return gpgme_keycache_update_key (ctx, is_sec, pub, keyid);      }
84  }      if (cleanup)
85            safe_free (gpg_secring);
86    }
87  gpgme_error_t  
88  keycache_init (const char *pubring, const char * secring)  
89  {  /* Update the key with the keyid @keyid in the key cache.
90      struct progress_filter_s pfx;     If @is_sec is 1, the secret key cache is used. */
91      gpgme_error_t err;  gpgme_error_t
92      int val = 0;  keycache_update (int is_sec, const char *keyid)
93      char * p;  {
94        gpg_keycache_t ctx = pub;
95      if (reload) {      gpgme_error_t err;
96          keycache_release ();  
97          reload = 0;      if (is_sec)
98      }          ctx = sec;
99      p = get_reg_entry (HKEY_CURRENT_USER, "Software\\WinPT", "nKeys");      err = gpg_keycache_update_key (ctx, is_sec, pub, keyid);
100      if (p && *p != ' ') {      if (is_sec)
101          val = atoi (p);          gpg_keycache_prepare_single (ctx, keyid, NULL, gpg_secring);
102          free_if_alloc (p);      return err;
103          memset (&pfx, 0, sizeof pfx);  }
104      }  
105    
106      err = gpgme_keycache_new (&pub);  /* Initialize both cache contexts. Use @pubring for the public
107      if (err)     keyring and @secring for the secret keyring. */
108          return err;  gpgme_error_t
109      if (val != 0)  keycache_init (const char *pubring, const char *secring)
110          gpgme_keycache_set_cb (pub, progress_callback, &pfx, val);  {
111      err = gpgme_keycache_new (&sec);      struct progress_filter_s pfx;
112      if (!err)      gpgme_error_t err;
113          err = gpgme_keycache_init (pub, NULL, 0);      int val = 0;
114      if (!err)      char *p;
115          err = gpgme_keycache_init( sec, NULL, 1 );  
116      if( !err && pubring && *pubring )      if (secring != NULL) {
117          err = gpgme_keycache_prepare( pub, pubring, NULL );          free_if_alloc (gpg_secring);
118      if( !err && secring && * secring )          gpg_secring = get_gnupg_keyring (0, NO_STRICT);
119          err = gpgme_keycache_prepare( sec, NULL, secring );      }
120      if (!err)      
121          gpgme_keycache_sync (pub, sec);      p = get_reg_entry (HKEY_CURRENT_USER, "Software\\WinPT", "nKeys");
122      if (val != 0)      if (p && *p != ' ') {
123          progress_cleanup (&pfx);          val = atoi (p);
124      return err;          free_if_alloc (p);      
125  } /* keycache_init */      }
126    
127        memset (&pfx, 0, sizeof (pfx));
128  void      /* Release old contexts first. */
129  keycache_set_reload( int yes )      keycache_release (0);
130  {  
131      reload = yes;      err = gpg_keycache_new (&pub);
132  } /* keycache_set_reload */      if (err)
133            return err;
134        if (val != 0)
135  int          gpg_keycache_set_cb (pub, progress_callback, &pfx, val);
136  keycache_get_reload( void )      err = gpg_keycache_new (&sec);
137  {      if (!err)
138      return reload;          err = gpg_keycache_init (pub, NULL, 0);
139  } /* keycache_get_reload */      if (!err)
140            err = gpg_keycache_init (sec, NULL, 1);
141        if (!err && pubring && *pubring)
142  gpgme_keycache_t          err = gpg_keycache_prepare (pub, pubring, NULL);
143  keycache_get_ctx( int is_pub )      if (!err && secring && * secring)
144  {          err = gpg_keycache_prepare (sec, NULL, secring);
145      return is_pub? pub : sec;      if (!err)
146  } /* keycache_get_ctx */          gpg_keycache_sync (pub, sec);
147        if (val != 0)
148            progress_cleanup (&pfx);
149  static int      return err;
150  get_key( const char *keyid, gpgme_key_t *r_key, int secret )  }
151  {  
152      gpgme_keycache_t cache;  
153      gpgme_error_t err;  /* Return the public cache context if @is_pub is set
154      int mode = secret? KEYCACHE_PRV : KEYCACHE_PUB;     the secre cache context otherwise. */
155    gpg_keycache_t
156      if( !keyid )  keycache_get_ctx (int is_pub)
157          return WPTERR_GENERAL;  {
158      if( r_key )      gpg_keycache_t ctx;
159          *r_key = NULL;  
160      cache = keycache_get_ctx( mode );      ctx = is_pub? pub : sec;
161      if( !cache )      if (!ctx)
162          BUG( NULL );          BUG (0);
163      err = gpgme_keycache_find_key( cache, keyid, 0, r_key );      return ctx;
164      if( err )  }
165          return WPTERR_GENERAL;  
166      return 0;  
167  } /* get_key */  /* Get the GPG key with keyid @keyid from the cache. Return it
168       in @r_key on success. */
169    static gpgme_error_t
170  static int  get_key_from_cache (const char *keyid, gpgme_key_t *r_key,
171  get_key2( const char * keyid, gpgme_key_t * r_key, int secret )                      struct keycache_s **c, int secret)
172  {  {
173      gpg_iobuf_t inp;      gpg_keycache_t cache;
174      char * p;      gpgme_error_t err;
175      int rc;      int mode = secret? KEYCACHE_PRV : KEYCACHE_PUB;
176    
177      p = get_gnupg_keyring (1, !NO_STRICT);      if (!keyid)
178      if( !p )          return gpg_error (GPG_ERR_INV_VALUE);
179          BUG( NULL );      if (r_key)
180            *r_key = NULL;
181      inp = gpg_iobuf_open( p );      cache = keycache_get_ctx (mode);
182      if( !inp ) {      if (!c)
183          const char *s = winpt_strerror( WPTERR_FILE_OPEN );          err = gpg_keycache_find_key (cache, keyid, 0, r_key);
184          log_box( _("WinPT Error"), 0, "%s: %s", p, s );      else
185          free_if_alloc( p );          err = gpg_keycache_find_key2 (cache, keyid, 0, r_key, c);
186          return NULL;      return err;
187      }  }
188      gpg_iobuf_ioctl( inp, 3, 1, NULL ); /* disable cache */  
189      rc = gpgme_getkey_bykeyid( inp, keyid, r_key );  
190    /* Get GPG key with keyid @keyid directly from GPG and return
191      gpg_iobuf_close( inp );     it in @r_key on success. */
192      free_if_alloc( p );  static gpgme_error_t
193      return rc;  get_key_directly (const char *keyid, gpgme_key_t *r_key, int secret)
194  } /* get_key2 */  {
195        gpgme_ctx_t ctx;
196        gpgme_error_t err;
197  int  
198  get_pubkey( const char *keyid, gpgme_key_t *ret_key )      err = gpgme_new (&ctx);
199  {      if (err)
200      int rc = 0;          return err;
201        err = gpgme_get_key (ctx, keyid, r_key, secret);
202      if( pub && sec )      gpgme_release (ctx);
203          rc = get_key( keyid, ret_key, 0 );      return err;
204      else  }
205          rc = get_key2( keyid, ret_key, 0 );  
206      return rc;  
207  } /* get_pubkey */  /* Search the public key with @keyid as the keyid in the cache and
208       return the item in @k. */
209    gpgme_error_t
210  int  winpt_get_pubkey (const char *keyid, winpt_key_s *k)
211  get_seckey( const char *keyid, gpgme_key_t *ret_skey )  {
212  {      gpgme_error_t err;
213      int rc = 0;      
214        err = get_key_from_cache (keyid, &k->ctx, &k->ext, 0);
215      if( pub && sec )      if (err)
216          rc = get_key( keyid, ret_skey, 1 );          return err;
217      else      k->is_v3 = k->ctx->subkeys->pubkey_algo == GPGME_PK_RSA &&
218          rc = get_key2( keyid, ret_skey, 1 );                  strlen (k->ctx->subkeys->fpr) == 32;
219      return rc;      k->is_protected = k->ext->gloflags.is_protected;
220  } /* get_seckey */      k->keyid = k->ctx->subkeys->keyid;
221        k->uid = k->ctx->uids->uid;
222        return 0;
223  int  }
224  count_insecure_elgkeys (void)  
225  {  
226      gpgme_keycache_t pc;  gpgme_error_t
227      gpgme_key_t key;  winpt_get_seckey (const char *keyid, winpt_key_s *k)
228      int n=0;  {
229        gpgme_error_t err;
230      pc = keycache_get_ctx (1);  
231      if (!pc)      err = get_key_from_cache (keyid, &k->ctx, &k->ext, 1);
232          BUG (0);      if (err)
233      while (!gpgme_keycache_next_key (pc, 0, &key)) {          return err;
234          if (gpgme_key_get_ulong_attr (key, GPGME_ATTR_ALGO, NULL, 0)      k->is_v3 = k->ctx->subkeys->pubkey_algo == GPGME_PK_RSA &&
235              == GPGME_PK_ELG_ES)                  strlen (k->ctx->subkeys->fpr) == 32;
236              n++;      k->is_protected = k->ext->gloflags.is_protected;
237      }      k->keyid = k->ctx->subkeys->keyid;
238      gpgme_keycache_rewind (pc);      k->uid = k->ctx->uids->uid;
239      return n;      return 0;
240  }  }
241    
242    
243    gpgme_error_t
244    get_pubkey (const char *keyid, gpgme_key_t *ret_key)
245    {
246        gpgme_error_t rc;
247    
248        if (pub && sec)
249            rc = get_key_from_cache (keyid, ret_key, NULL, 0);
250        else
251            rc = get_key_directly (keyid, ret_key, 0);
252        return rc;
253    }
254    
255    
256    gpgme_error_t
257    get_seckey (const char *keyid, gpgme_key_t *ret_skey)
258    {
259        gpgme_error_t rc;
260    
261        if (pub && sec)
262            rc = get_key_from_cache (keyid, ret_skey, NULL, 1);
263        else
264            rc = get_key_directly (keyid, ret_skey, 1);
265        return rc;
266    }
267    
268    
269    /* Search for insecure ElGamal keys and return the
270       number of founded keys. */
271    int
272    count_insecure_elgkeys (void)
273    {
274        gpg_keycache_t pc;
275        gpgme_key_t key;
276        int n=0;
277    
278        pc = keycache_get_ctx (1);
279        while (!gpg_keycache_next_key (pc, 0, &key)) {
280            if (key->subkeys->pubkey_algo == GPGME_PK_ELG)
281                n++;
282        }
283        gpg_keycache_rewind (pc);
284        return n;
285    }
286    
287    
288    
289    /* Map the signature summary in @sum to signature status table index.
290       Return value: index to table. */
291    static int
292    sigsum_to_index (gpgme_sigsum_t sum)
293    {
294        if ((sum & GPGME_SIGSUM_VALID) && (sum & GPGME_SIGSUM_KEY_REVOKED))
295            return 7;
296        if ((sum & GPGME_SIGSUM_VALID) && (sum & GPGME_SIGSUM_SIG_EXPIRED))
297            return 6;
298        if (sum & GPGME_SIGSUM_GREEN)
299            return 1;
300        else if (sum & GPGME_SIGSUM_RED)
301            return 2;
302        else if (sum & GPGME_SIGSUM_KEY_MISSING)
303            return 3;
304        return 0;
305    }
306    
307    
308    /* Return a humand readable description for the signature status @sum. */
309    const char*
310    get_gpg_sigstat (gpgme_sigsum_t sum)
311    {
312        const char *gpg_sigstat[] = {
313            _("Error during verification process."),
314            _("The signature is good."),
315            _("The signature is BAD!"),
316            _("The signature could not be checked due to a missing key."),
317            _("No valid OpenPGP signature."),
318            _("Signature Error"),
319            _("Good Signature (Expired Key)"),
320            _("Good Signature (Revoked Key)"),
321            NULL
322        };
323        const unsigned int mask = 8;
324    
325        return gpg_sigstat[sigsum_to_index (sum) % mask];
326    }
327    
328    
329    /* Check if the secret keyring contains at least one
330       key with ultimate trust.
331       Return value: 0 on success. */
332    int
333    check_ultimate_trusted_key (void)
334    {
335        struct keycache_s *n;
336    
337        for (n = sec->item; n; n = n->next) {
338            if (n->pubpart &&
339                n->pubpart->key->owner_trust == GPGME_VALIDITY_ULTIMATE)
340            return 0;
341        }
342        return -1;
343    }
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