/[winpt]/trunk/Src/wptGPGME.cpp
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revision 32 by twoaday, Mon Oct 24 08:03:48 2005 UTC revision 109 by twoaday, Fri Dec 2 07:32:13 2005 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;  static gpg_keycache_t pub = NULL;
45    static gpg_keycache_t sec = NULL;
46    static unsigned int reload = 0;
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      }          if (gpg_secring)
86  }              free (gpg_secring);
87            gpg_secring = NULL;
88        }
89  /* Update the key with the keyid @keyid in the key cache.  }
90     If @is_sec is 1, the secret key cache is used. */  
91  gpgme_error_t  
92  keycache_update (int is_sec, const char *keyid)  /* Update the key with the keyid @keyid in the key cache.
93  {     If @is_sec is 1, the secret key cache is used. */
94      gpg_keycache_t ctx = pub;  gpgme_error_t
95      gpgme_error_t err;  keycache_update (int is_sec, const char *keyid)
96    {
97      if (is_sec)      gpg_keycache_t ctx = pub;
98          ctx = sec;      gpgme_error_t err;
99      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);          ctx = sec;
102      return err;      err = gpg_keycache_update_key (ctx, is_sec, pub, keyid);
103  }      if (is_sec)
104            gpg_keycache_prepare_single (ctx, keyid, NULL, gpg_secring);
105  /* XXX: cache_keyring_names must be called then the GPG homedir changes! */      return err;
106    }
107  /* Initialize both cache contexts. Use @pubring for the public  
108     keyring and @secring for the secret keyring. */  /* XXX: cache_keyring_names must be called then the GPG homedir changes! */
109  gpgme_error_t  
110  keycache_init (const char *pubring, const char *secring)  /* Initialize both cache contexts. Use @pubring for the public
111  {     keyring and @secring for the secret keyring. */
112      struct progress_filter_s pfx;  gpgme_error_t
113      gpgme_error_t err;  keycache_init (const char *pubring, const char *secring)
114      int val = 0;  {
115      char *p;      struct progress_filter_s pfx;
116        gpgme_error_t err;
117      if (secring != NULL) {      int val = 0;
118          free_if_alloc (gpg_secring);      char *p;
119          gpg_secring = get_gnupg_keyring (0, NO_STRICT);  
120      }      if (secring != NULL) {
121            free_if_alloc (gpg_secring);
122      if (reload) {          gpg_secring = get_gnupg_keyring (0, NO_STRICT);
123          keycache_release (0);      }
124          reload = 0;  
125      }      if (reload) {
126      p = get_reg_entry (HKEY_CURRENT_USER, "Software\\WinPT", "nKeys");          keycache_release (0);
127      if (p && *p != ' ') {          reload = 0;
128          val = atoi (p);      }
129          free_if_alloc (p);      p = get_reg_entry (HKEY_CURRENT_USER, "Software\\WinPT", "nKeys");
130          memset (&pfx, 0, sizeof (pfx));      if (p && *p != ' ') {
131      }          val = atoi (p);
132            free_if_alloc (p);
133      err = gpg_keycache_new (&pub);          memset (&pfx, 0, sizeof (pfx));
134      if (err)      }
135          return err;  
136      if (val != 0)      err = gpg_keycache_new (&pub);
137          gpg_keycache_set_cb (pub, progress_callback, &pfx, val);      if (err)
138      err = gpg_keycache_new (&sec);          return err;
139      if (!err)      if (val != 0)
140          err = gpg_keycache_init (pub, NULL, 0);          gpg_keycache_set_cb (pub, progress_callback, &pfx, val);
141      if (!err)      err = gpg_keycache_new (&sec);
142          err = gpg_keycache_init( sec, NULL, 1 );      if (!err)
143      if( !err && pubring && *pubring )          err = gpg_keycache_init (pub, NULL, 0);
144          err = gpg_keycache_prepare( pub, pubring, NULL );      if (!err)
145      if( !err && secring && * secring )          err = gpg_keycache_init( sec, NULL, 1 );
146          err = gpg_keycache_prepare( sec, NULL, secring );      if( !err && pubring && *pubring )
147      if (!err)          err = gpg_keycache_prepare( pub, pubring, NULL );
148          gpg_keycache_sync (pub, sec);      if( !err && secring && * secring )
149      if (val != 0)          err = gpg_keycache_prepare( sec, NULL, secring );
150          progress_cleanup (&pfx);      if (!err)
151      return err;          gpg_keycache_sync (pub, sec);
152  }      if (val != 0)
153            progress_cleanup (&pfx);
154        return err;
155  /* If @val = 1 indicate to reload the cache. */  }
156  void  
157  keycache_set_reload (int val)  
158  {  /* If @val = 1 indicate to reload the cache. */
159      reload = val;  void
160  }  keycache_set_reload (int val)
161    {
162        reload = val;
163  /* Return the reload cache flag. */  }
164  int  
165  keycache_get_reload (void)  
166  {  /* Return the reload cache flag. */
167      return reload;  int
168  }  keycache_get_reload (void)
169    {
170        return reload;
171  /* Return the public cache context if @is_pub is set  }
172     the secre cache context otherwise. */  
173  gpg_keycache_t  
174  keycache_get_ctx (int is_pub)  /* Return the public cache context if @is_pub is set
175  {     the secre cache context otherwise. */
176      return is_pub? pub : sec;  gpg_keycache_t
177  }  keycache_get_ctx (int is_pub)
178    {
179        return is_pub? pub : sec;
180  /* Get the GPG key with keyid @keyid from the cache. Return it  }
181     in @r_key on success. */  
182  static int  
183  get_key_from_cache (const char *keyid, gpgme_key_t *r_key,  /* Get the GPG key with keyid @keyid from the cache. Return it
184                      struct keycache_s **c, int secret)     in @r_key on success. */
185  {  static int
186      gpg_keycache_t cache;  get_key_from_cache (const char *keyid, gpgme_key_t *r_key,
187      gpgme_error_t err;                      struct keycache_s **c, int secret)
188      int mode = secret? KEYCACHE_PRV : KEYCACHE_PUB;  {
189        gpg_keycache_t cache;
190      if (!keyid)      gpgme_error_t err;
191          return WPTERR_GENERAL;      int mode = secret? KEYCACHE_PRV : KEYCACHE_PUB;
192      if (r_key)  
193          *r_key = NULL;      if (!keyid)
194      cache = keycache_get_ctx (mode);          return WPTERR_GENERAL;
195      if (!cache)      if (r_key)
196          BUG( NULL );          *r_key = NULL;
197      if (!c)      cache = keycache_get_ctx (mode);
198          err = gpg_keycache_find_key (cache, keyid, 0, r_key);      if (!cache)
199      else          BUG( NULL );
200          err = gpg_keycache_find_key2 (cache, keyid, 0, r_key, c);      if (!c)
201      return err? WPTERR_GENERAL : 0;          err = gpg_keycache_find_key (cache, keyid, 0, r_key);
202  }      else
203            err = gpg_keycache_find_key2 (cache, keyid, 0, r_key, c);
204        return err? WPTERR_GENERAL : 0;
205  /* Get GPG key with keyid @keyid directly from GPG and return  }
206     it in @r_key on success. */  
207  static int  
208  get_key_directly (const char *keyid, gpgme_key_t *r_key, int secret)  /* Get GPG key with keyid @keyid directly from GPG and return
209  {     it in @r_key on success. */
210      gpgme_ctx_t ctx;  static int
211      gpgme_error_t err;  get_key_directly (const char *keyid, gpgme_key_t *r_key, int secret)
212    {
213      err = gpgme_new (&ctx);      gpgme_ctx_t ctx;
214      if (err)      gpgme_error_t err;
215          return WPTERR_GENERAL;  
216      err = gpgme_get_key (ctx, keyid, r_key, secret);      err = gpgme_new (&ctx);
217      gpgme_release (ctx);      if (err)
218      return err? WPTERR_GENERAL : 0;          return WPTERR_GENERAL;
219  }      err = gpgme_get_key (ctx, keyid, r_key, secret);
220        gpgme_release (ctx);
221        return err? WPTERR_GENERAL : 0;
222  /* Search the public key with @keyid as the keyid in the cache and  }
223     return the item in @k. */  
224  int  
225  winpt_get_pubkey (const char *keyid, winpt_key_s *k)  /* Search the public key with @keyid as the keyid in the cache and
226  {     return the item in @k. */
227      int rc;  int
228        winpt_get_pubkey (const char *keyid, winpt_key_s *k)
229      rc = get_key_from_cache (keyid, &k->ctx, &k->ext, 0);  {
230      if (rc)      int rc;
231          return rc;      
232      k->is_v3 = k->ctx->subkeys->pubkey_algo == GPGME_PK_RSA &&      rc = get_key_from_cache (keyid, &k->ctx, &k->ext, 0);
233                  strlen (k->ctx->subkeys->fpr) == 32;      if (rc)
234      k->is_protected = k->ext->gloflags.is_protected;          return rc;
235      k->keyid = k->ctx->subkeys->keyid;      k->is_v3 = k->ctx->subkeys->pubkey_algo == GPGME_PK_RSA &&
236      k->uid = k->ctx->uids->uid;                  strlen (k->ctx->subkeys->fpr) == 32;
237      return rc;      k->is_protected = k->ext->gloflags.is_protected;
238  }      k->keyid = k->ctx->subkeys->keyid;
239        k->uid = k->ctx->uids->uid;
240        return rc;
241  int  }
242  winpt_get_seckey (const char *keyid, winpt_key_s *k)  
243  {  
244      int rc;  int
245      rc = get_key_from_cache (keyid, &k->ctx, &k->ext, 1);  winpt_get_seckey (const char *keyid, winpt_key_s *k)
246      if (rc)  {
247          return rc;      int rc;
248      k->is_v3 = k->ctx->subkeys->pubkey_algo == GPGME_PK_RSA &&      rc = get_key_from_cache (keyid, &k->ctx, &k->ext, 1);
249                  strlen (k->ctx->subkeys->fpr) == 32;      if (rc)
250      k->is_protected = k->ext->gloflags.is_protected;          return rc;
251      k->keyid = k->ctx->subkeys->keyid;      k->is_v3 = k->ctx->subkeys->pubkey_algo == GPGME_PK_RSA &&
252      k->uid = k->ctx->uids->uid;                  strlen (k->ctx->subkeys->fpr) == 32;
253      return rc;      k->is_protected = k->ext->gloflags.is_protected;
254  }      k->keyid = k->ctx->subkeys->keyid;
255        k->uid = k->ctx->uids->uid;
256        return rc;
257  int  }
258  get_pubkey (const char *keyid, gpgme_key_t *ret_key)  
259  {  
260      int rc;  int
261    get_pubkey (const char *keyid, gpgme_key_t *ret_key)
262      if (pub && sec)  {
263          rc = get_key_from_cache (keyid, ret_key, NULL, 0);      int rc;
264      else  
265          rc = get_key_directly (keyid, ret_key, 0);      if (pub && sec)
266      return rc;          rc = get_key_from_cache (keyid, ret_key, NULL, 0);
267  }      else
268            rc = get_key_directly (keyid, ret_key, 0);
269        return rc;
270  int  }
271  get_seckey (const char *keyid, gpgme_key_t *ret_skey)  
272  {  
273      int rc;  int
274    get_seckey (const char *keyid, gpgme_key_t *ret_skey)
275      if (pub && sec)  {
276          rc = get_key_from_cache (keyid, ret_skey, NULL, 1);      int rc;
277      else  
278          rc = get_key_directly (keyid, ret_skey, 1);      if (pub && sec)
279      return rc;          rc = get_key_from_cache (keyid, ret_skey, NULL, 1);
280  }      else
281            rc = get_key_directly (keyid, ret_skey, 1);
282        return rc;
283  /* Search for insecure ElGamal keys and return the  }
284     number of founded keys. */  
285  int  
286  count_insecure_elgkeys (void)  /* Search for insecure ElGamal keys and return the
287  {     number of founded keys. */
288      gpg_keycache_t pc;  int
289      gpgme_key_t key;  count_insecure_elgkeys (void)
290      int n=0;  {
291        gpg_keycache_t pc;
292      pc = keycache_get_ctx (1);      gpgme_key_t key;
293      if (!pc)      int n=0;
294          BUG (0);  
295      while (!gpg_keycache_next_key (pc, 0, &key)) {      pc = keycache_get_ctx (1);
296          if (key->subkeys->pubkey_algo == GPGME_PK_ELG)      if (!pc)
297              n++;          BUG (0);
298      }      while (!gpg_keycache_next_key (pc, 0, &key)) {
299      gpg_keycache_rewind (pc);          if (key->subkeys->pubkey_algo == GPGME_PK_ELG)
300      return n;              n++;
301  }      }
302        gpg_keycache_rewind (pc);
303        return n;
304    }
305    
306    
307    
308    /* Map the signature summary in @sum to signature status table index.
309       Return value: index to table. */
310    static int
311    sigsum_to_index (gpgme_sigsum_t sum)
312    {
313        if ((sum & GPGME_SIGSUM_VALID) && (sum & GPGME_SIGSUM_KEY_REVOKED))
314            return 7;
315        if ((sum & GPGME_SIGSUM_VALID) && (sum & GPGME_SIGSUM_SIG_EXPIRED))
316            return 6;
317        if (sum & GPGME_SIGSUM_GREEN)
318            return 1;
319        else if (sum & GPGME_SIGSUM_RED)
320            return 2;
321        else if (sum & GPGME_SIGSUM_KEY_MISSING)
322            return 3;
323        return 0;
324    }
325    
326    
327    /* Return a humand readable description for the signature status @sum. */
328    const char*
329    get_gpg_sigstat (gpgme_sigsum_t sum)
330    {
331        const char *gpg_sigstat[] = {
332            _("Error during verification process."),
333            _("The signature is good."),
334            _("The signature is BAD!"),
335            _("The signature could not be checked due to a missing key."),
336            _("No valid OpenPGP signature."),
337            _("Signature Error"),
338            _("Good Signature (Expired Key)"),
339            _("Good Signature (Revoked Key)"),
340            NULL
341        };
342        const unsigned int mask = 8;
343    
344        return gpg_sigstat[sigsum_to_index (sum) % mask];
345    }
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