/[winpt]/trunk/Src/wptGPGME.cpp
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revision 24 by twoaday, Sat Oct 8 10:43:08 2005 UTC revision 208 by twoaday, Mon May 1 12:22:18 2006 UTC
# Line 1  Line 1 
1  /* wptGPGME.cpp - WinPT GPGME interface  /* wptGPGME.cpp - WinPT GPGME interface
2   *      Copyright (C) 2001-2005 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  static char *gpg_secring = NULL;  static gpg_keycache_t pub = NULL;
45    static gpg_keycache_t sec = NULL;
46  void  static char *gpg_secring = NULL;
47  keycache_reload (HWND dlg)  
48  {        
49      refresh_cache_s rcs;  /* Reload the key cache. */
50    void
51      memset (&rcs, 0, sizeof rcs);  keycache_reload (HWND dlg)
52      rcs.kr_reload = rcs.kr_update = 1;  {      
53      rcs.tr_update = 0;      refresh_cache_s rcs;
54      DialogBoxParam (glob_hinst, (LPCSTR)IDD_WINPT_KEYCACHE, dlg,                                          
55                      keycache_dlg_proc, (LPARAM)&rcs);      memset (&rcs, 0, sizeof rcs);
56  } /* keycache_reload */      rcs.kr_reload = rcs.kr_update = 1;
57        rcs.tr_update = 0;
58  void      DialogBoxParam (glob_hinst, (LPCSTR)IDD_WINPT_KEYCACHE, dlg,                                        
59  keycache_release (void)                      keycache_dlg_proc, (LPARAM)&rcs);
60  {  }
61      int n = gpgme_keycache_count (pub);  
62      char tmpbuf[64];  
63    /* Release both key cache objects. If @cleanup is 1,
64      /* XXX: update the value when the cache has changed. */     also release other global structs. */
65      sprintf (tmpbuf, "%d", n);  void
66      set_reg_key (HKEY_CURRENT_USER, "Software\\WinPT", "nKeys", tmpbuf);  keycache_release (int cleanup)
67    {
68      if (pub) {      int n = gpg_keycache_get_size (pub);
69          gpgme_keycache_release (pub);      char tmpbuf[64];
70          pub = NULL;  
71      }      /* XXX: update the value when the cache has changed. */
72      if (sec) {      sprintf (tmpbuf, "%d", n);
73          gpgme_keycache_release (sec);      set_reg_key (HKEY_CURRENT_USER, "Software\\WinPT", "nKeys", tmpbuf);
74          sec = NULL;  
75      }      if (pub) {
76  } /* keycache_release */          gpg_keycache_release (pub);
77            pub = NULL;
78        }
79  gpgme_error_t      if (sec) {
80  keycache_update (int is_sec, const char *keyid)          gpg_keycache_release (sec);
81  {          sec = NULL;
82      gpgme_keycache_t ctx = pub;      }
83      gpgme_error_t err;      if (cleanup) {
84            if (gpg_secring)
85      if (is_sec)              free (gpg_secring);
86          ctx = sec;          gpg_secring = NULL;
87      err =  gpgme_keycache_update_key (ctx, is_sec, pub, keyid);      }
88      if (is_sec)  }
89          gpgme_keycache_prepare_single (ctx, keyid, NULL, gpg_secring);  
90      return err;  
91  }  /* Update the key with the keyid @keyid in the key cache.
92       If @is_sec is 1, the secret key cache is used. */
93  /* XXX: cache_keyring_names must be called then the GPG homedir changes! */  gpgme_error_t
94    keycache_update (int is_sec, const char *keyid)
95  gpgme_error_t  {
96  keycache_init (const char *pubring, const char * secring)      gpg_keycache_t ctx = pub;
97  {      gpgme_error_t err;
98      struct progress_filter_s pfx;  
99      gpgme_error_t err;      if (is_sec)
100      int val = 0;          ctx = sec;
101      char * p;      err = gpg_keycache_update_key (ctx, is_sec, pub, keyid);
102        if (is_sec)
103      if (secring != NULL) {          gpg_keycache_prepare_single (ctx, keyid, NULL, gpg_secring);
104          free_if_alloc (gpg_secring);      return err;
105          gpg_secring = get_gnupg_keyring (0, NO_STRICT);  }
106      }  
107    
108      if (reload) {  /* Initialize both cache contexts. Use @pubring for the public
109          keycache_release ();     keyring and @secring for the secret keyring. */
110          reload = 0;  gpgme_error_t
111      }  keycache_init (const char *pubring, const char *secring)
112      p = get_reg_entry (HKEY_CURRENT_USER, "Software\\WinPT", "nKeys");  {
113      if (p && *p != ' ') {      struct progress_filter_s pfx;
114          val = atoi (p);      gpgme_error_t err;
115          free_if_alloc (p);      int val = 0;
116          memset (&pfx, 0, sizeof (pfx));      char *p;
117      }  
118        if (secring != NULL) {
119      err = gpgme_keycache_new (&pub);          free_if_alloc (gpg_secring);
120      if (err)          gpg_secring = get_gnupg_keyring (0, NO_STRICT);
121          return err;      }
122      if (val != 0)      
123          gpgme_keycache_set_cb (pub, progress_callback, &pfx, val);      p = get_reg_entry (HKEY_CURRENT_USER, "Software\\WinPT", "nKeys");
124      err = gpgme_keycache_new (&sec);      if (p && *p != ' ') {
125      if (!err)          val = atoi (p);
126          err = gpgme_keycache_init (pub, NULL, 0);          free_if_alloc (p);      
127      if (!err)      }
128          err = gpgme_keycache_init( sec, NULL, 1 );  
129      if( !err && pubring && *pubring )      memset (&pfx, 0, sizeof (pfx));
130          err = gpgme_keycache_prepare( pub, pubring, NULL );      /* Release old contexts first. */
131      if( !err && secring && * secring )      keycache_release (0);
132          err = gpgme_keycache_prepare( sec, NULL, secring );  
133      if (!err)      err = gpg_keycache_new (&pub);
134          gpgme_keycache_sync (pub, sec);      if (err)
135      if (val != 0)          return err;
136          progress_cleanup (&pfx);      if (val != 0)
137      return err;          gpg_keycache_set_cb (pub, progress_callback, &pfx, val);
138  } /* keycache_init */      err = gpg_keycache_new (&sec);
139        if (!err)
140            err = gpg_keycache_init (pub, NULL, 0);
141  void      if (!err)
142  keycache_set_reload( int yes )          err = gpg_keycache_init (sec, NULL, 1);
143  {      if (!err && pubring && *pubring)
144      reload = yes;          err = gpg_keycache_prepare (pub, pubring, NULL);
145  } /* keycache_set_reload */      if (!err && secring && * secring)
146            err = gpg_keycache_prepare (sec, NULL, secring);
147        if (!err)
148  int          gpg_keycache_sync (pub, sec);
149  keycache_get_reload( void )      if (val != 0)
150  {          progress_cleanup (&pfx);
151      return reload;      return err;
152  } /* keycache_get_reload */  }
153    
154    
155  gpgme_keycache_t  /* Return the public cache context if @is_pub is set
156  keycache_get_ctx (int is_pub)     the secre cache context otherwise. */
157  {  gpg_keycache_t
158      return is_pub? pub : sec;  keycache_get_ctx (int is_pub)
159  } /* keycache_get_ctx */  {
160        gpg_keycache_t ctx;
161    
162  static int      ctx = is_pub? pub : sec;
163  get_key (const char *keyid, gpgme_key_t *r_key, struct keycache_s **c, int secret)      if (!ctx)
164  {          BUG (0);
165      gpgme_keycache_t cache;      return ctx;
166      gpgme_error_t err;  }
167      int mode = secret? KEYCACHE_PRV : KEYCACHE_PUB;  
168    
169      if( !keyid )  /* Get the GPG key with keyid @keyid from the cache. Return it
170          return WPTERR_GENERAL;     in @r_key on success. */
171      if( r_key )  static int
172          *r_key = NULL;  get_key_from_cache (const char *keyid, gpgme_key_t *r_key,
173      cache = keycache_get_ctx (mode);                      struct keycache_s **c, int secret)
174      if( !cache )  {
175          BUG( NULL );      gpg_keycache_t cache;
176      if (!c)      gpgme_error_t err;
177          err = gpgme_keycache_find_key( cache, keyid, 0, r_key );      int mode = secret? KEYCACHE_PRV : KEYCACHE_PUB;
178      else  
179          err = gpgme_keycache_find_key2 (cache, keyid, 0, r_key, c);      if (!keyid)
180      if( err )          return WPTERR_GENERAL;
181          return WPTERR_GENERAL;      if (r_key)
182      return 0;          *r_key = NULL;
183  } /* get_key */      cache = keycache_get_ctx (mode);
184        if (!cache)
185            BUG (0);
186  static int      if (!c)
187  get_key2( const char * keyid, gpgme_key_t * r_key, int secret )          err = gpg_keycache_find_key (cache, keyid, 0, r_key);
188  {      else
189      gpg_iobuf_t inp;          err = gpg_keycache_find_key2 (cache, keyid, 0, r_key, c);
190      char * p;      return err? WPTERR_GENERAL : 0;
191      int rc;  }
192    
193      p = get_gnupg_keyring (1, !NO_STRICT);  
194      if( !p )  /* Get GPG key with keyid @keyid directly from GPG and return
195          BUG( NULL );     it in @r_key on success. */
196    static int
197      inp = gpg_iobuf_open( p );  get_key_directly (const char *keyid, gpgme_key_t *r_key, int secret)
198      if( !inp ) {  {
199          const char *s = winpt_strerror( WPTERR_FILE_OPEN );      gpgme_ctx_t ctx;
200          log_box( _("WinPT Error"), 0, "%s: %s", p, s );      gpgme_error_t err;
201          free_if_alloc( p );  
202          return NULL;      err = gpgme_new (&ctx);
203      }      if (err)
204      gpg_iobuf_ioctl( inp, 3, 1, NULL ); /* disable cache */          return WPTERR_GENERAL;
205      /*rc = gpgme_getkey_bykeyid( inp, keyid, r_key ); XXX */      err = gpgme_get_key (ctx, keyid, r_key, secret);
206      rc=0;      gpgme_release (ctx);
207        return err? WPTERR_GENERAL : 0;
208      gpg_iobuf_close( inp );  }
209      free_if_alloc( p );  
210      return rc;  
211  } /* get_key2 */  /* Search the public key with @keyid as the keyid in the cache and
212       return the item in @k. */
213    int
214  int  winpt_get_pubkey (const char *keyid, winpt_key_s *k)
215  winpt_get_pubkey (const char *keyid, winpt_key_s *k)  {
216  {      int rc;
217      int rc;      
218            rc = get_key_from_cache (keyid, &k->ctx, &k->ext, 0);
219      rc = get_key (keyid, &k->ctx, &k->ext, 0);      if (rc)
220      if (rc)          return rc;
221          return rc;      k->is_v3 = k->ctx->subkeys->pubkey_algo == GPGME_PK_RSA &&
222      k->is_v3 = k->ctx->subkeys->pubkey_algo == GPGME_PK_RSA && strlen (k->ctx->subkeys->fpr) == 32;                  strlen (k->ctx->subkeys->fpr) == 32;
223      k->is_protected = k->ext->gloflags.is_protected;      k->is_protected = k->ext->gloflags.is_protected;
224      k->keyid = k->ctx->subkeys->keyid;      k->keyid = k->ctx->subkeys->keyid;
225      k->uid = k->ctx->uids->uid;      k->uid = k->ctx->uids->uid;
226      return rc;      return rc;
227  }  }
228    
229    
230  int  int
231  winpt_get_seckey (const char *keyid, winpt_key_s *k)  winpt_get_seckey (const char *keyid, winpt_key_s *k)
232  {  {
233      int rc;      int rc;
234      rc = get_key (keyid, &k->ctx, &k->ext, 1);      rc = get_key_from_cache (keyid, &k->ctx, &k->ext, 1);
235      if (rc)      if (rc)
236          return rc;          return rc;
237      k->is_v3 = k->ctx->subkeys->pubkey_algo == GPGME_PK_RSA && strlen (k->ctx->subkeys->fpr) == 32;      k->is_v3 = k->ctx->subkeys->pubkey_algo == GPGME_PK_RSA &&
238      k->is_protected = k->ext->gloflags.is_protected;                  strlen (k->ctx->subkeys->fpr) == 32;
239      k->keyid = k->ctx->subkeys->keyid;      k->is_protected = k->ext->gloflags.is_protected;
240      k->uid = k->ctx->uids->uid;      k->keyid = k->ctx->subkeys->keyid;
241      return rc;      k->uid = k->ctx->uids->uid;
242  }      return rc;
243    }
244    
245  int  
246  get_pubkey (const char *keyid, gpgme_key_t *ret_key)  int
247  {  get_pubkey (const char *keyid, gpgme_key_t *ret_key)
248      int rc = 0;  {
249        int rc;
250      if (pub && sec)  
251          rc = get_key (keyid, ret_key, NULL, 0);      if (pub && sec)
252      else          rc = get_key_from_cache (keyid, ret_key, NULL, 0);
253          rc = get_key2 (keyid, ret_key, 0);      else
254      return rc;          rc = get_key_directly (keyid, ret_key, 0);
255  } /* get_pubkey */      return rc;
256    }
257    
258  int  
259  get_seckey( const char *keyid, gpgme_key_t *ret_skey )  int
260  {  get_seckey (const char *keyid, gpgme_key_t *ret_skey)
261      int rc = 0;  {
262        int rc;
263      if( pub && sec )  
264          rc = get_key( keyid, ret_skey, NULL, 1 );      if (pub && sec)
265      else          rc = get_key_from_cache (keyid, ret_skey, NULL, 1);
266          rc = get_key2( keyid, ret_skey, 1 );      else
267      return rc;          rc = get_key_directly (keyid, ret_skey, 1);
268  } /* get_seckey */      return rc;
269    }
270    
271  int  
272  count_insecure_elgkeys (void)  /* Search for insecure ElGamal keys and return the
273  {     number of founded keys. */
274      gpgme_keycache_t pc;  int
275      gpgme_key_t key;  count_insecure_elgkeys (void)
276      int n=0;  {
277        gpg_keycache_t pc;
278      pc = keycache_get_ctx (1);      gpgme_key_t key;
279      if (!pc)      int n=0;
280          BUG (0);  
281      while (!gpgme_keycache_next_key (pc, 0, &key)) {      pc = keycache_get_ctx (1);
282          if (key->subkeys->pubkey_algo == GPGME_PK_ELG)      if (!pc)
283              n++;          BUG (0);
284      }      while (!gpg_keycache_next_key (pc, 0, &key)) {
285      gpgme_keycache_rewind (pc);          if (key->subkeys->pubkey_algo == GPGME_PK_ELG)
286      return n;              n++;
287  }      }
288        gpg_keycache_rewind (pc);
289        return n;
290    }
291    
292    
293    
294    /* Map the signature summary in @sum to signature status table index.
295       Return value: index to table. */
296    static int
297    sigsum_to_index (gpgme_sigsum_t sum)
298    {
299        if ((sum & GPGME_SIGSUM_VALID) && (sum & GPGME_SIGSUM_KEY_REVOKED))
300            return 7;
301        if ((sum & GPGME_SIGSUM_VALID) && (sum & GPGME_SIGSUM_SIG_EXPIRED))
302            return 6;
303        if (sum & GPGME_SIGSUM_GREEN)
304            return 1;
305        else if (sum & GPGME_SIGSUM_RED)
306            return 2;
307        else if (sum & GPGME_SIGSUM_KEY_MISSING)
308            return 3;
309        return 0;
310    }
311    
312    
313    /* Return a humand readable description for the signature status @sum. */
314    const char*
315    get_gpg_sigstat (gpgme_sigsum_t sum)
316    {
317        const char *gpg_sigstat[] = {
318            _("Error during verification process."),
319            _("The signature is good."),
320            _("The signature is BAD!"),
321            _("The signature could not be checked due to a missing key."),
322            _("No valid OpenPGP signature."),
323            _("Signature Error"),
324            _("Good Signature (Expired Key)"),
325            _("Good Signature (Revoked Key)"),
326            NULL
327        };
328        const unsigned int mask = 8;
329    
330        return gpg_sigstat[sigsum_to_index (sum) % mask];
331    }
332    
333    
334    /* Check if the secret keyring contains at least one
335       key with ultimate trust.
336       Return value: 0 on success. */
337    int
338    check_ultimate_trusted_key (void)
339    {
340        struct keycache_s *n;
341    
342        for (n = sec->item; n; n = n->next) {
343            if (n->pubpart &&
344                n->pubpart->key->owner_trust == GPGME_VALIDITY_ULTIMATE)
345            return 0;
346        }
347        return -1;
348    }
Legend:
Removed from v.24  
changed lines
  Added in v.208
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