/[winpt]/trunk/Src/wptGPGME.cpp
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revision 32 by twoaday, Mon Oct 24 08:03:48 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  /* Initialize both cache contexts. Use @pubring for the public     keyring and @secring for the secret keyring. */
108     keyring and @secring for the secret keyring. */  gpgme_error_t
109  gpgme_error_t  keycache_init (const char *pubring, const char *secring)
110  keycache_init (const char *pubring, const char *secring)  {
111  {      struct progress_filter_s pfx;
112      struct progress_filter_s pfx;      gpgme_error_t err;
113      gpgme_error_t err;      int val = 0;
114      int val = 0;      char *p;
115      char *p;  
116        if (secring != NULL) {
117      if (secring != NULL) {          free_if_alloc (gpg_secring);
118          free_if_alloc (gpg_secring);          gpg_secring = get_gnupg_keyring (0, NO_STRICT);
119          gpg_secring = get_gnupg_keyring (0, NO_STRICT);      }
120      }      
121        p = get_reg_entry (HKEY_CURRENT_USER, "Software\\WinPT", "nKeys");
122      if (reload) {      if (p && *p != ' ') {
123          keycache_release (0);          val = atoi (p);
124          reload = 0;          free_if_alloc (p);      
125      }      }
126      p = get_reg_entry (HKEY_CURRENT_USER, "Software\\WinPT", "nKeys");  
127      if (p && *p != ' ') {      memset (&pfx, 0, sizeof (pfx));
128          val = atoi (p);      /* Release old contexts first. */
129          free_if_alloc (p);      keycache_release (0);
130          memset (&pfx, 0, sizeof (pfx));  
131      }      err = gpg_keycache_new (&pub);
132        if (err)
133      err = gpg_keycache_new (&pub);          return err;
134      if (err)      if (val != 0)
135          return err;          gpg_keycache_set_cb (pub, progress_callback, &pfx, val);
136      if (val != 0)      err = gpg_keycache_new (&sec);
137          gpg_keycache_set_cb (pub, progress_callback, &pfx, val);      if (!err)
138      err = gpg_keycache_new (&sec);          err = gpg_keycache_init (pub, NULL, 0);
139      if (!err)      if (!err)
140          err = gpg_keycache_init (pub, NULL, 0);          err = gpg_keycache_init (sec, NULL, 1);
141      if (!err)      if (!err && pubring && *pubring)
142          err = gpg_keycache_init( sec, NULL, 1 );          err = gpg_keycache_prepare (pub, pubring, NULL);
143      if( !err && pubring && *pubring )      if (!err && secring && * secring)
144          err = gpg_keycache_prepare( pub, pubring, NULL );          err = gpg_keycache_prepare (sec, NULL, secring);
145      if( !err && secring && * secring )      if (!err)
146          err = gpg_keycache_prepare( sec, NULL, secring );          gpg_keycache_sync (pub, sec);
147      if (!err)      if (val != 0)
148          gpg_keycache_sync (pub, sec);          progress_cleanup (&pfx);
149      if (val != 0)      return err;
150          progress_cleanup (&pfx);  }
151      return err;  
152  }  
153    /* Return the public cache context if @is_pub is set
154       the secre cache context otherwise. */
155  /* If @val = 1 indicate to reload the cache. */  gpg_keycache_t
156  void  keycache_get_ctx (int is_pub)
157  keycache_set_reload (int val)  {
158  {      gpg_keycache_t ctx;
159      reload = val;  
160  }      ctx = is_pub? pub : sec;
161        if (!ctx)
162            BUG (0);
163  /* Return the reload cache flag. */      return ctx;
164  int  }
165  keycache_get_reload (void)  
166  {  
167      return reload;  /* Get the GPG key with keyid @keyid from the cache. Return it
168  }     in @r_key on success. */
169    static gpgme_error_t
170    get_key_from_cache (const char *keyid, gpgme_key_t *r_key,
171  /* Return the public cache context if @is_pub is set                      struct keycache_s **c, int secret)
172     the secre cache context otherwise. */  {
173  gpg_keycache_t      gpg_keycache_t cache;
174  keycache_get_ctx (int is_pub)      gpgme_error_t err;
175  {      int mode = secret? KEYCACHE_PRV : KEYCACHE_PUB;
176      return is_pub? pub : sec;  
177  }      if (!keyid)
178            return gpg_error (GPG_ERR_INV_VALUE);
179        if (r_key)
180  /* Get the GPG key with keyid @keyid from the cache. Return it          *r_key = NULL;
181     in @r_key on success. */      cache = keycache_get_ctx (mode);
182  static int      if (!c)
183  get_key_from_cache (const char *keyid, gpgme_key_t *r_key,          err = gpg_keycache_find_key (cache, keyid, 0, r_key);
184                      struct keycache_s **c, int secret)      else
185  {          err = gpg_keycache_find_key2 (cache, keyid, 0, r_key, c);
186      gpg_keycache_t cache;      return err;
187      gpgme_error_t err;  }
188      int mode = secret? KEYCACHE_PRV : KEYCACHE_PUB;  
189    
190      if (!keyid)  /* Get GPG key with keyid @keyid directly from GPG and return
191          return WPTERR_GENERAL;     it in @r_key on success. */
192      if (r_key)  static gpgme_error_t
193          *r_key = NULL;  get_key_directly (const char *keyid, gpgme_key_t *r_key, int secret)
194      cache = keycache_get_ctx (mode);  {
195      if (!cache)      gpgme_ctx_t ctx;
196          BUG( NULL );      gpgme_error_t err;
197      if (!c)  
198          err = gpg_keycache_find_key (cache, keyid, 0, r_key);      err = gpgme_new (&ctx);
199      else      if (err)
200          err = gpg_keycache_find_key2 (cache, keyid, 0, r_key, c);          return err;
201      return err? WPTERR_GENERAL : 0;      err = gpgme_get_key (ctx, keyid, r_key, secret);
202  }      gpgme_release (ctx);
203        return err;
204    }
205  /* Get GPG key with keyid @keyid directly from GPG and return  
206     it in @r_key on success. */  
207  static int  /* Search the public key with @keyid as the keyid in the cache and
208  get_key_directly (const char *keyid, gpgme_key_t *r_key, int secret)     return the item in @k. */
209  {  gpgme_error_t
210      gpgme_ctx_t ctx;  winpt_get_pubkey (const char *keyid, winpt_key_s *k)
211      gpgme_error_t err;  {
212        gpgme_error_t err;
213      err = gpgme_new (&ctx);      
214      if (err)      err = get_key_from_cache (keyid, &k->ctx, &k->ext, 0);
215          return WPTERR_GENERAL;      if (err)
216      err = gpgme_get_key (ctx, keyid, r_key, secret);          return err;
217      gpgme_release (ctx);      k->is_v3 = k->ctx->subkeys->pubkey_algo == GPGME_PK_RSA &&
218      return err? WPTERR_GENERAL : 0;                  strlen (k->ctx->subkeys->fpr) == 32;
219  }      k->is_protected = k->ext->gloflags.is_protected;
220        k->keyid = k->ctx->subkeys->keyid;
221        k->uid = k->ctx->uids->uid;
222  /* Search the public key with @keyid as the keyid in the cache and      return 0;
223     return the item in @k. */  }
224  int  
225  winpt_get_pubkey (const char *keyid, winpt_key_s *k)  
226  {  gpgme_error_t
227      int rc;  winpt_get_seckey (const char *keyid, winpt_key_s *k)
228        {
229      rc = get_key_from_cache (keyid, &k->ctx, &k->ext, 0);      gpgme_error_t err;
230      if (rc)  
231          return rc;      err = get_key_from_cache (keyid, &k->ctx, &k->ext, 1);
232      k->is_v3 = k->ctx->subkeys->pubkey_algo == GPGME_PK_RSA &&      if (err)
233                  strlen (k->ctx->subkeys->fpr) == 32;          return err;
234      k->is_protected = k->ext->gloflags.is_protected;      k->is_v3 = k->ctx->subkeys->pubkey_algo == GPGME_PK_RSA &&
235      k->keyid = k->ctx->subkeys->keyid;                  strlen (k->ctx->subkeys->fpr) == 32;
236      k->uid = k->ctx->uids->uid;      k->is_protected = k->ext->gloflags.is_protected;
237      return rc;      k->keyid = k->ctx->subkeys->keyid;
238  }      k->uid = k->ctx->uids->uid;
239        return 0;
240    }
241  int  
242  winpt_get_seckey (const char *keyid, winpt_key_s *k)  
243  {  gpgme_error_t
244      int rc;  get_pubkey (const char *keyid, gpgme_key_t *ret_key)
245      rc = get_key_from_cache (keyid, &k->ctx, &k->ext, 1);  {
246      if (rc)      gpgme_error_t rc;
247          return rc;  
248      k->is_v3 = k->ctx->subkeys->pubkey_algo == GPGME_PK_RSA &&      if (pub && sec)
249                  strlen (k->ctx->subkeys->fpr) == 32;          rc = get_key_from_cache (keyid, ret_key, NULL, 0);
250      k->is_protected = k->ext->gloflags.is_protected;      else
251      k->keyid = k->ctx->subkeys->keyid;          rc = get_key_directly (keyid, ret_key, 0);
252      k->uid = k->ctx->uids->uid;      return rc;
253      return rc;  }
254  }  
255    
256    gpgme_error_t
257  int  get_seckey (const char *keyid, gpgme_key_t *ret_skey)
258  get_pubkey (const char *keyid, gpgme_key_t *ret_key)  {
259  {      gpgme_error_t rc;
260      int rc;  
261        if (pub && sec)
262      if (pub && sec)          rc = get_key_from_cache (keyid, ret_skey, NULL, 1);
263          rc = get_key_from_cache (keyid, ret_key, NULL, 0);      else
264      else          rc = get_key_directly (keyid, ret_skey, 1);
265          rc = get_key_directly (keyid, ret_key, 0);      return rc;
266      return rc;  }
267  }  
268    
269    /* Search for insecure ElGamal keys and return the
270  int     number of founded keys. */
271  get_seckey (const char *keyid, gpgme_key_t *ret_skey)  int
272  {  count_insecure_elgkeys (void)
273      int rc;  {
274        gpg_keycache_t pc;
275      if (pub && sec)      gpgme_key_t key;
276          rc = get_key_from_cache (keyid, ret_skey, NULL, 1);      int n=0;
277      else  
278          rc = get_key_directly (keyid, ret_skey, 1);      pc = keycache_get_ctx (1);
279      return rc;      while (!gpg_keycache_next_key (pc, 0, &key)) {
280  }          if (key->subkeys->pubkey_algo == GPGME_PK_ELG)
281                n++;
282        }
283  /* Search for insecure ElGamal keys and return the      gpg_keycache_rewind (pc);
284     number of founded keys. */      return n;
285  int  }
286  count_insecure_elgkeys (void)  
287  {  
288      gpg_keycache_t pc;  
289      gpgme_key_t key;  /* Map the signature summary in @sum to signature status table index.
290      int n=0;     Return value: index to table. */
291    static int
292      pc = keycache_get_ctx (1);  sigsum_to_index (gpgme_sigsum_t sum)
293      if (!pc)  {
294          BUG (0);      if ((sum & GPGME_SIGSUM_VALID) && (sum & GPGME_SIGSUM_KEY_REVOKED))
295      while (!gpg_keycache_next_key (pc, 0, &key)) {          return 7;
296          if (key->subkeys->pubkey_algo == GPGME_PK_ELG)      if ((sum & GPGME_SIGSUM_VALID) && (sum & GPGME_SIGSUM_SIG_EXPIRED))
297              n++;          return 6;
298      }      if (sum & GPGME_SIGSUM_GREEN)
299      gpg_keycache_rewind (pc);          return 1;
300      return n;      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:
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changed lines
  Added in v.211
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