/[winpt]/trunk/Src/wptGPGME.cpp
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revision 25 by twoaday, Wed Oct 12 10:04:26 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) 2001-2005 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 gpg_keycache_t pub = NULL;  BOOL CALLBACK  keycache_dlg_proc (HWND dlg, UINT msg, WPARAM wparam, LPARAM lparam);
42  static gpg_keycache_t sec = NULL;  void progress_cleanup (progress_filter_s * pfx);
43  static unsigned int reload = 0;  
44  static char *gpg_secring = NULL;  /* Global GPG key cache contexts. */
45    static gpg_keycache_t pub = NULL;
46    static gpg_keycache_t sec = NULL;
47  /* Reload the key cache. */  static char *gpg_secring = NULL;
48  void  
49  keycache_reload (HWND dlg)  
50  {        /* Reload the key cache. */
51      refresh_cache_s rcs;  void
52    keycache_reload (HWND dlg)
53      memset (&rcs, 0, sizeof rcs);  {      
54      rcs.kr_reload = rcs.kr_update = 1;      refresh_cache_s rcs;
55      rcs.tr_update = 0;  
56      DialogBoxParam (glob_hinst, (LPCSTR)IDD_WINPT_KEYCACHE, dlg,                                              memset (&rcs, 0, sizeof rcs);
57                      keycache_dlg_proc, (LPARAM)&rcs);      rcs.kr_reload = rcs.kr_update = 1;
58  }      rcs.tr_update = 0;
59        DialogBoxParam (glob_hinst, (LPCSTR)IDD_WINPT_KEYCACHE, dlg,                                        
60                        keycache_dlg_proc, (LPARAM)&rcs);
61  /* Release both key cache objects. If @cleanup is 1,  }
62     also release other global structs. */  
63  void  
64  keycache_release (int cleanup)  /* Release both key cache objects. If @cleanup is 1,
65  {     also release other global structs. */
66      int n = gpg_keycache_get_size (pub);  void
67      char tmpbuf[64];  keycache_release (int cleanup)
68    {
69      /* XXX: update the value when the cache has changed. */      int n = gpg_keycache_get_size (pub);
70      sprintf (tmpbuf, "%d", n);      char tmpbuf[64];
71      set_reg_key (HKEY_CURRENT_USER, "Software\\WinPT", "nKeys", tmpbuf);  
72        /* XXX: update the value when the cache has changed. */
73      if (pub) {      sprintf (tmpbuf, "%d", n);
74          gpg_keycache_release (pub);      set_reg_key (HKEY_CURRENT_USER, "Software\\WinPT", "nKeys", tmpbuf);
75          pub = NULL;  
76      }      if (pub) {
77      if (sec) {          gpg_keycache_release (pub);
78          gpg_keycache_release (sec);          pub = NULL;
79          sec = NULL;      }
80      }      if (sec) {
81      if (cleanup) {          gpg_keycache_release (sec);
82          if (gpg_secring)          sec = NULL;
83              free (gpg_secring);      }
84          gpg_secring = NULL;      if (cleanup)
85      }          safe_free (gpg_secring);
86  }  }
87    
88    
89  /* Update the key with the keyid @keyid in the key cache.  /* Update the key with the keyid @keyid in the key cache.
90     If @is_sec is 1, the secret key cache is used. */     If @is_sec is 1, the secret key cache is used. */
91  gpgme_error_t  gpgme_error_t
92  keycache_update (int is_sec, const char *keyid)  keycache_update (int is_sec, const char *keyid)
93  {  {
94      gpg_keycache_t ctx = pub;      gpg_keycache_t ctx = pub;
95      gpgme_error_t err;      gpgme_error_t err;
96    
97      if (is_sec)      if (is_sec)
98          ctx = sec;          ctx = sec;
99      err = gpg_keycache_update_key (ctx, is_sec, pub, keyid);      err = gpg_keycache_update_key (ctx, is_sec, pub, keyid);
100      if (is_sec)      if (is_sec)
101          gpg_keycache_prepare_single (ctx, keyid, NULL, gpg_secring);          gpg_keycache_prepare_single (ctx, keyid, NULL, gpg_secring);
102      return err;      return err;
103  }  }
104    
105  /* XXX: cache_keyring_names must be called then the GPG homedir changes! */  
106    /* Initialize both cache contexts. Use @pubring for the public
107  gpgme_error_t     keyring and @secring for the secret keyring. */
108  keycache_init (const char *pubring, const char * secring)  gpgme_error_t
109  {  keycache_init (const char *pubring, const char *secring)
110      struct progress_filter_s pfx;  {
111      gpgme_error_t err;      struct progress_filter_s pfx;
112      int val = 0;      gpgme_error_t err;
113      char * p;      int val = 0;
114        char *p;
115      if (secring != NULL) {  
116          free_if_alloc (gpg_secring);      if (secring != NULL) {
117          gpg_secring = get_gnupg_keyring (0, NO_STRICT);          free_if_alloc (gpg_secring);
118      }          gpg_secring = get_gnupg_keyring (0, NO_STRICT);
119        }
120      if (reload) {      
121          keycache_release (0);      p = get_reg_entry (HKEY_CURRENT_USER, "Software\\WinPT", "nKeys");
122          reload = 0;      if (p && *p != ' ') {
123      }          val = atoi (p);
124      p = get_reg_entry (HKEY_CURRENT_USER, "Software\\WinPT", "nKeys");          free_if_alloc (p);      
125      if (p && *p != ' ') {      }
126          val = atoi (p);  
127          free_if_alloc (p);      memset (&pfx, 0, sizeof (pfx));
128          memset (&pfx, 0, sizeof (pfx));      /* Release old contexts first. */
129      }      keycache_release (0);
130    
131      err = gpg_keycache_new (&pub);      err = gpg_keycache_new (&pub);
132      if (err)      if (err)
133          return err;          return err;
134      if (val != 0)      if (val != 0)
135          gpg_keycache_set_cb (pub, progress_callback, &pfx, val);          gpg_keycache_set_cb (pub, progress_callback, &pfx, val);
136      err = gpg_keycache_new (&sec);      err = gpg_keycache_new (&sec);
137      if (!err)      if (!err)
138          err = gpg_keycache_init (pub, NULL, 0);          err = gpg_keycache_init (pub, NULL, 0);
139      if (!err)      if (!err)
140          err = gpg_keycache_init( sec, NULL, 1 );          err = gpg_keycache_init (sec, NULL, 1);
141      if( !err && pubring && *pubring )      if (!err && pubring && *pubring)
142          err = gpg_keycache_prepare( pub, pubring, NULL );          err = gpg_keycache_prepare (pub, pubring, NULL);
143      if( !err && secring && * secring )      if (!err && secring && * secring)
144          err = gpg_keycache_prepare( sec, NULL, secring );          err = gpg_keycache_prepare (sec, NULL, secring);
145      if (!err)      if (!err)
146          gpg_keycache_sync (pub, sec);          gpg_keycache_sync (pub, sec);
147      if (val != 0)      if (val != 0)
148          progress_cleanup (&pfx);          progress_cleanup (&pfx);
149      return err;      return err;
150  } /* keycache_init */  }
151    
152    
153  void  /* Return the public cache context if @is_pub is set
154  keycache_set_reload( int yes )     the secre cache context otherwise. */
155  {  gpg_keycache_t
156      reload = yes;  keycache_get_ctx (int is_pub)
157  } /* keycache_set_reload */  {
158        gpg_keycache_t ctx;
159    
160  int      ctx = is_pub? pub : sec;
161  keycache_get_reload( void )      if (!ctx)
162  {          BUG (0);
163      return reload;      return ctx;
164  } /* keycache_get_reload */  }
165    
166    
167  gpg_keycache_t  /* Get the GPG key with keyid @keyid from the cache. Return it
168  keycache_get_ctx (int is_pub)     in @r_key on success. */
169  {  static gpgme_error_t
170      return is_pub? pub : sec;  get_key_from_cache (const char *keyid, gpgme_key_t *r_key,
171  }                      struct keycache_s **c, int secret)
172    {
173        gpg_keycache_t cache;
174  /* Get the GPG key with keyid @keyid from the cache. Return it      gpgme_error_t err;
175     in @r_key on success. */      int mode = secret? KEYCACHE_PRV : KEYCACHE_PUB;
176  static int  
177  get_key_from_cache (const char *keyid, gpgme_key_t *r_key,      if (!keyid)
178                      struct keycache_s **c, int secret)          return gpg_error (GPG_ERR_INV_VALUE);
179  {      if (r_key)
180      gpg_keycache_t cache;          *r_key = NULL;
181      gpgme_error_t err;      cache = keycache_get_ctx (mode);
182      int mode = secret? KEYCACHE_PRV : KEYCACHE_PUB;      if (!c)
183            err = gpg_keycache_find_key (cache, keyid, 0, r_key);
184      if (!keyid)      else
185          return WPTERR_GENERAL;          err = gpg_keycache_find_key2 (cache, keyid, 0, r_key, c);
186      if (r_key)      return err;
187          *r_key = NULL;  }
188      cache = keycache_get_ctx (mode);  
189      if (!cache)  
190          BUG( NULL );  /* Get GPG key with keyid @keyid directly from GPG and return
191      if (!c)     it in @r_key on success. */
192          err = gpg_keycache_find_key (cache, keyid, 0, r_key);  static gpgme_error_t
193      else  get_key_directly (const char *keyid, gpgme_key_t *r_key, int secret)
194          err = gpg_keycache_find_key2 (cache, keyid, 0, r_key, c);  {
195      return err? WPTERR_GENERAL : 0;      gpgme_ctx_t ctx;
196  }      gpgme_error_t err;
197    
198        err = gpgme_new (&ctx);
199  /* Get GPG key with keyid @keyid directly from GPG and return      if (err)
200     it in @r_key on success. */          return err;
201  static int      err = gpgme_get_key (ctx, keyid, r_key, secret);
202  get_key_directly (const char *keyid, gpgme_key_t *r_key, int secret)      gpgme_release (ctx);
203  {      return err;
204      gpgme_ctx_t ctx;  }
205      gpgme_error_t err;  
206    
207      err = gpgme_new (&ctx);  /* Search the public key with @keyid as the keyid in the cache and
208      if (err)     return the item in @k. */
209          return WPTERR_GENERAL;  gpgme_error_t
210      err = gpgme_get_key (ctx, keyid, r_key, secret);  winpt_get_pubkey (const char *keyid, winpt_key_s *k)
211      gpgme_release (ctx);  {
212      return err? WPTERR_GENERAL : 0;      gpgme_error_t err;
213  }      
214        err = get_key_from_cache (keyid, &k->ctx, &k->ext, 0);
215        if (err)
216  int          return err;
217  winpt_get_pubkey (const char *keyid, winpt_key_s *k)      k->is_v3 = k->ctx->subkeys->pubkey_algo == GPGME_PK_RSA &&
218  {                  strlen (k->ctx->subkeys->fpr) == 32;
219      int rc;      k->is_protected = k->ext->gloflags.is_protected;
220            k->keyid = k->ctx->subkeys->keyid;
221      rc = get_key_from_cache (keyid, &k->ctx, &k->ext, 0);      k->uid = k->ctx->uids->uid;
222      if (rc)      return 0;
223          return rc;  }
224      k->is_v3 = k->ctx->subkeys->pubkey_algo == GPGME_PK_RSA && strlen (k->ctx->subkeys->fpr) == 32;  
225      k->is_protected = k->ext->gloflags.is_protected;  
226      k->keyid = k->ctx->subkeys->keyid;  gpgme_error_t
227      k->uid = k->ctx->uids->uid;  winpt_get_seckey (const char *keyid, winpt_key_s *k)
228      return rc;  {
229  }      gpgme_error_t err;
230    
231        err = get_key_from_cache (keyid, &k->ctx, &k->ext, 1);
232  int      if (err)
233  winpt_get_seckey (const char *keyid, winpt_key_s *k)          return err;
234  {      k->is_v3 = k->ctx->subkeys->pubkey_algo == GPGME_PK_RSA &&
235      int rc;                  strlen (k->ctx->subkeys->fpr) == 32;
236      rc = get_key_from_cache (keyid, &k->ctx, &k->ext, 1);      k->is_protected = k->ext->gloflags.is_protected;
237      if (rc)      k->keyid = k->ctx->subkeys->keyid;
238          return rc;      k->uid = k->ctx->uids->uid;
239      k->is_v3 = k->ctx->subkeys->pubkey_algo == GPGME_PK_RSA && strlen (k->ctx->subkeys->fpr) == 32;      return 0;
240      k->is_protected = k->ext->gloflags.is_protected;  }
241      k->keyid = k->ctx->subkeys->keyid;  
242      k->uid = k->ctx->uids->uid;  
243      return rc;  gpgme_error_t
244  }  get_pubkey (const char *keyid, gpgme_key_t *ret_key)
245    {
246        gpgme_error_t rc;
247  int  
248  get_pubkey (const char *keyid, gpgme_key_t *ret_key)      if (pub && sec)
249  {          rc = get_key_from_cache (keyid, ret_key, NULL, 0);
250      int rc = 0;      else
251            rc = get_key_directly (keyid, ret_key, 0);
252      if (pub && sec)      return rc;
253          rc = get_key_from_cache (keyid, ret_key, NULL, 0);  }
254      else  
255          rc = get_key_directly (keyid, ret_key, 0);  
256      return rc;  gpgme_error_t
257  }  get_seckey (const char *keyid, gpgme_key_t *ret_skey)
258    {
259        gpgme_error_t rc;
260  int  
261  get_seckey (const char *keyid, gpgme_key_t *ret_skey)      if (pub && sec)
262  {          rc = get_key_from_cache (keyid, ret_skey, NULL, 1);
263      int rc = 0;      else
264            rc = get_key_directly (keyid, ret_skey, 1);
265      if (pub && sec)      return rc;
266          rc = get_key_from_cache (keyid, ret_skey, NULL, 1);  }
267      else  
268          rc = get_key_directly (keyid, ret_skey, 1);  
269      return rc;  /* Search for insecure ElGamal keys and return the
270  }     number of founded keys. */
271    int
272    count_insecure_elgkeys (void)
273  /* Search for insecure ElGamal keys and return the  {
274     number of founded keys. */      gpg_keycache_t pc;
275  int      gpgme_key_t key;
276  count_insecure_elgkeys (void)      int n=0;
277  {  
278      gpg_keycache_t pc;      pc = keycache_get_ctx (1);
279      gpgme_key_t key;      while (!gpg_keycache_next_key (pc, 0, &key)) {
280      int n=0;          if (key->subkeys->pubkey_algo == GPGME_PK_ELG)
281                n++;
282      pc = keycache_get_ctx (1);      }
283      if (!pc)      gpg_keycache_rewind (pc);
284          BUG (0);      return n;
285      while (!gpg_keycache_next_key (pc, 0, &key)) {  }
286          if (key->subkeys->pubkey_algo == GPGME_PK_ELG)  
287              n++;  
288      }  
289      gpg_keycache_rewind (pc);  /* Map the signature summary in @sum to signature status table index.
290      return n;     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    }
Legend:
Removed from v.25  
changed lines
  Added in v.211
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