/[winpt]/trunk/Src/wptGPGME.cpp
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revision 32 by twoaday, Mon Oct 24 08:03:48 2005 UTC revision 271 by twoaday, Sun Nov 5 08:57:45 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) 2001-2006 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  {        /* Return 1 if no cache is available.
51      refresh_cache_s rcs;     This can be the case if WinPT were run in command line mode. */
52    int
53      memset (&rcs, 0, sizeof rcs);  keycache_not_available (void)
54      rcs.kr_reload = rcs.kr_update = 1;  {
55      rcs.tr_update = 0;      return pub == NULL;
56      DialogBoxParam (glob_hinst, (LPCSTR)IDD_WINPT_KEYCACHE, dlg,                                          }
57                      keycache_dlg_proc, (LPARAM)&rcs);  
58  }  /* Release both key cache objects. If @cleanup is 1,
59       also release other global structs. */
60    void
61  /* Release both key cache objects. If @cleanup is 1,  keycache_release (int cleanup)
62     also release other global structs. */  {
63  void      char tmpbuf[64];
64  keycache_release (int cleanup)      int n = gpg_keycache_get_size (pub);
65  {  
66      int n = gpg_keycache_get_size (pub);      /* XXX: update the value when the cache has changed. */
67      char tmpbuf[64];      _snprintf (tmpbuf, DIM (tmpbuf)-1, "%d", n);
68        set_reg_key (HKEY_CURRENT_USER, "Software\\WinPT", "nKeys", tmpbuf);
69      /* XXX: update the value when the cache has changed. */  
70      sprintf (tmpbuf, "%d", n);      if (pub) {
71      set_reg_key (HKEY_CURRENT_USER, "Software\\WinPT", "nKeys", tmpbuf);          gpg_keycache_release (pub);
72            pub = NULL;
73      if (pub) {      }
74          gpg_keycache_release (pub);      if (sec) {
75          pub = NULL;          gpg_keycache_release (sec);
76      }          sec = NULL;
77      if (sec) {      }
78          gpg_keycache_release (sec);      if (cleanup)
79          sec = NULL;          safe_free (gpg_secring);
80      }  }
81      if (cleanup) {  
82          if (gpg_secring)  
83              free (gpg_secring);  /* Update the key with the keyid @keyid in the key cache.
84          gpg_secring = NULL;     If @is_sec is 1, the secret key cache is used. */
85      }  gpgme_error_t
86  }  keycache_update (int is_sec, const char *keyid)
87    {
88        gpg_keycache_t ctx = pub;
89  /* Update the key with the keyid @keyid in the key cache.      gpgme_error_t err;
90     If @is_sec is 1, the secret key cache is used. */  
91  gpgme_error_t      if (is_sec)
92  keycache_update (int is_sec, const char *keyid)          ctx = sec;
93  {      err = gpg_keycache_update_key (ctx, is_sec, pub, keyid);
94      gpg_keycache_t ctx = pub;      if (is_sec)
95      gpgme_error_t err;          gpg_keycache_prepare_single (ctx, keyid, NULL, gpg_secring);
96        return err;
97      if (is_sec)  }
98          ctx = sec;  
99      err = gpg_keycache_update_key (ctx, is_sec, pub, keyid);  
100      if (is_sec)  /* Initialize both cache contexts. Use @pubring for the public
101          gpg_keycache_prepare_single (ctx, keyid, NULL, gpg_secring);     keyring and @secring for the secret keyring. */
102      return err;  gpgme_error_t
103  }  keycache_init (const char *pubring, const char *secring)
104    {
105  /* XXX: cache_keyring_names must be called then the GPG homedir changes! */      struct progress_filter_s pfx;
106        gpgme_error_t err;
107  /* Initialize both cache contexts. Use @pubring for the public      int val = 0;
108     keyring and @secring for the secret keyring. */      char *p;
109  gpgme_error_t  
110  keycache_init (const char *pubring, const char *secring)      if (secring != NULL) {
111  {          free_if_alloc (gpg_secring);
112      struct progress_filter_s pfx;          gpg_secring = get_gnupg_keyring (0, NO_STRICT);
113      gpgme_error_t err;          log_debug ("keycache_init: secring path '%s'\r\n", gpg_secring);
114      int val = 0;      }
115      char *p;      
116        p = get_reg_entry (HKEY_CURRENT_USER, "Software\\WinPT", "nKeys");
117      if (secring != NULL) {      if (p && *p != ' ') {
118          free_if_alloc (gpg_secring);          val = atoi (p);
119          gpg_secring = get_gnupg_keyring (0, NO_STRICT);          free_if_alloc (p);      
120      }      }
121    
122      if (reload) {      memset (&pfx, 0, sizeof (pfx));
123          keycache_release (0);      keycache_release (0); /* Release old contexts first. */
124          reload = 0;  
125      }      err = gpg_keycache_new (&pub);
126      p = get_reg_entry (HKEY_CURRENT_USER, "Software\\WinPT", "nKeys");      if (err)
127      if (p && *p != ' ') {          return err;
128          val = atoi (p);      if (val != 0)
129          free_if_alloc (p);          gpg_keycache_set_cb (pub, progress_callback, &pfx, val);
130          memset (&pfx, 0, sizeof (pfx));      err = gpg_keycache_new (&sec);
131      }      if (!err)
132            err = gpg_keycache_init (pub, NULL, 0);
133      err = gpg_keycache_new (&pub);      if (!err)
134      if (err)          err = gpg_keycache_init (sec, NULL, 1);
135          return err;      if (!err && pubring && *pubring)
136      if (val != 0)          err = gpg_keycache_prepare (pub, pubring, NULL);
137          gpg_keycache_set_cb (pub, progress_callback, &pfx, val);      if (!err && secring && * secring)
138      err = gpg_keycache_new (&sec);          err = gpg_keycache_prepare (sec, NULL, secring);
139      if (!err)      if (!err)
140          err = gpg_keycache_init (pub, NULL, 0);          gpg_keycache_sync (pub, sec);
141      if (!err)      if (val != 0)
142          err = gpg_keycache_init( sec, NULL, 1 );          progress_cleanup (&pfx);
143      if( !err && pubring && *pubring )      return err;
144          err = gpg_keycache_prepare( pub, pubring, NULL );  }
145      if( !err && secring && * secring )  
146          err = gpg_keycache_prepare( sec, NULL, secring );  
147      if (!err)  /* Return the public cache context if @is_pub is set
148          gpg_keycache_sync (pub, sec);     the secre cache context otherwise. */
149      if (val != 0)  gpg_keycache_t
150          progress_cleanup (&pfx);  keycache_get_ctx (int is_pub)
151      return err;  {
152  }      gpg_keycache_t ctx;
153    
154        ctx = is_pub? pub : sec;
155  /* If @val = 1 indicate to reload the cache. */      if (!ctx)
156  void          BUG (0);
157  keycache_set_reload (int val)      return ctx;
158  {  }
159      reload = val;  
160  }  
161    /* Get the GPG key with keyid @keyid from the cache. Return it
162       in @r_key on success. */
163  /* Return the reload cache flag. */  static gpgme_error_t
164  int  get_key_from_cache (const char *keyid, int secret, gpgme_key_t *r_key,
165  keycache_get_reload (void)                      struct keycache_s **c)
166  {  {
167      return reload;      gpg_keycache_t cache;
168  }      gpgme_error_t err;
169        int mode = secret? KEYCACHE_PRV : KEYCACHE_PUB;
170    
171  /* Return the public cache context if @is_pub is set      if (!keyid)
172     the secre cache context otherwise. */          return gpg_error (GPG_ERR_INV_VALUE);
173  gpg_keycache_t      if (r_key)
174  keycache_get_ctx (int is_pub)          *r_key = NULL;
175  {      cache = keycache_get_ctx (mode);
176      return is_pub? pub : sec;      if (!c)
177  }          err = gpg_keycache_find_key (cache, keyid, 0, r_key);
178        else
179            err = gpg_keycache_find_key2 (cache, keyid, 0, r_key, c);
180  /* Get the GPG key with keyid @keyid from the cache. Return it      return err;
181     in @r_key on success. */  }
182  static int  
183  get_key_from_cache (const char *keyid, gpgme_key_t *r_key,  
184                      struct keycache_s **c, int secret)  /* Release the internal key structure.
185  {     If allocated is 0, assume fixed cache item. */
186      gpg_keycache_t cache;  void
187      gpgme_error_t err;  winpt_release_pubkey (winpt_key_s *k)
188      int mode = secret? KEYCACHE_PRV : KEYCACHE_PUB;  {
189        /*log_box ("debug", 0, "alloc %d", k->allocated);*/
190      if (!keyid)      if (!k->allocated)
191          return WPTERR_GENERAL;          return;
192      if (r_key)      gpg_keycache_item_release (k->ext);
193          *r_key = NULL;      k->ext = NULL;
194      cache = keycache_get_ctx (mode);      k->allocated = 0;
195      if (!cache)  }
196          BUG( NULL );  
197      if (!c)  
198          err = gpg_keycache_find_key (cache, keyid, 0, r_key);  /* Search the public key with @keyid as the keyid in the cache and
199      else     return the item in @k. */
200          err = gpg_keycache_find_key2 (cache, keyid, 0, r_key, c);  gpgme_error_t
201      return err? WPTERR_GENERAL : 0;  winpt_get_pubkey (const char *keyid, winpt_key_s *k)
202  }  {
203        gpgme_error_t err = gpg_error (GPG_ERR_NO_ERROR);
204        
205  /* Get GPG key with keyid @keyid directly from GPG and return      if (pub)
206     it in @r_key on success. */          err = get_key_from_cache (keyid, 0, &k->ctx, &k->ext);
207  static int      else
208  get_key_directly (const char *keyid, gpgme_key_t *r_key, int secret)          err = gpg_keycache_fetch_key (keyid, 0, &k->ctx, &k->ext);
209  {      if (err)
210      gpgme_ctx_t ctx;          return err;
211      gpgme_error_t err;      k->is_v3 = k->ctx->subkeys->pubkey_algo == GPGME_PK_RSA &&
212                    strlen (k->ctx->subkeys->fpr) == 32;
213      err = gpgme_new (&ctx);      k->is_protected = k->ext->gloflags.is_protected;
214      if (err)      k->keyid = k->ctx->subkeys->keyid+8;
215          return WPTERR_GENERAL;      k->uid = k->ext->uids->uid;
216      err = gpgme_get_key (ctx, keyid, r_key, secret);      k->allocated = pub? 0 : 1;
217      gpgme_release (ctx);      return 0;
218      return err? WPTERR_GENERAL : 0;  }
219  }  
220    
221    gpgme_error_t
222  /* Search the public key with @keyid as the keyid in the cache and  winpt_get_seckey (const char *keyid, winpt_key_s *k)
223     return the item in @k. */  {
224  int      gpgme_error_t err;
225  winpt_get_pubkey (const char *keyid, winpt_key_s *k)  
226  {      if (sec)
227      int rc;          err = get_key_from_cache (keyid, 1, &k->ctx, &k->ext);
228            else
229      rc = get_key_from_cache (keyid, &k->ctx, &k->ext, 0);          err = gpg_keycache_fetch_key (keyid, 1, &k->ctx, &k->ext);
230      if (rc)      if (err)
231          return rc;          return err;
232      k->is_v3 = k->ctx->subkeys->pubkey_algo == GPGME_PK_RSA &&      k->is_v3 = k->ctx->subkeys->pubkey_algo == GPGME_PK_RSA &&
233                  strlen (k->ctx->subkeys->fpr) == 32;                  strlen (k->ctx->subkeys->fpr) == 32;
234      k->is_protected = k->ext->gloflags.is_protected;      k->is_protected = k->ext->gloflags.is_protected;
235      k->keyid = k->ctx->subkeys->keyid;      k->keyid = k->ctx->subkeys->keyid+8;
236      k->uid = k->ctx->uids->uid;      k->uid = k->ext->uids->uid;
237      return rc;      k->allocated = sec? 0 : 1;
238  }      return 0;
239    }
240    
241  int  
242  winpt_get_seckey (const char *keyid, winpt_key_s *k)  gpgme_error_t
243  {  get_pubkey (const char *keyid, gpgme_key_t *ret_key)
244      int rc;  {
245      rc = get_key_from_cache (keyid, &k->ctx, &k->ext, 1);      return get_key_from_cache (keyid, 0, ret_key, NULL);
246      if (rc)  }
247          return rc;  
248      k->is_v3 = k->ctx->subkeys->pubkey_algo == GPGME_PK_RSA &&  
249                  strlen (k->ctx->subkeys->fpr) == 32;  gpgme_error_t
250      k->is_protected = k->ext->gloflags.is_protected;  get_seckey (const char *keyid, gpgme_key_t *ret_skey)
251      k->keyid = k->ctx->subkeys->keyid;  {
252      k->uid = k->ctx->uids->uid;      return get_key_from_cache (keyid, 1, ret_skey, NULL);
253      return rc;  }
254  }  
255    
256    /* Map the signature summary in @sum to signature status table index.
257  int     Return value: index to table. */
258  get_pubkey (const char *keyid, gpgme_key_t *ret_key)  static int
259  {  sigsum_to_index (gpgme_sigsum_t sum)
260      int rc;  {
261        if (sum & GPGME_SIGSUM_RED)
262      if (pub && sec)          return 2;
263          rc = get_key_from_cache (keyid, ret_key, NULL, 0);      else if (sum & GPGME_SIGSUM_SIG_EXPIRED)
264      else          return 8;
265          rc = get_key_directly (keyid, ret_key, 0);      else if (sum & GPGME_SIGSUM_KEY_REVOKED)
266      return rc;          return 7;
267  }      else if (sum & GPGME_SIGSUM_KEY_EXPIRED)
268            return 6;
269        else if (sum & GPGME_SIGSUM_GREEN)
270  int          return 1;
271  get_seckey (const char *keyid, gpgme_key_t *ret_skey)      else if (sum & GPGME_SIGSUM_KEY_MISSING)
272  {          return 3;
273      int rc;      return 0;
274    }
275      if (pub && sec)  
276          rc = get_key_from_cache (keyid, ret_skey, NULL, 1);  
277      else  /* Return a humand readable description for the signature status @sum.
278          rc = get_key_directly (keyid, ret_skey, 1);     Warning: this function does not consider the validity of the key. */
279      return rc;  const char*
280  }  get_gpg_sigstat (gpgme_sigsum_t sum)
281    {
282        const char *gpg_sigstat[] = {
283  /* Search for insecure ElGamal keys and return the          _("Error during verification process"),
284     number of founded keys. */          _("The signature is good"),
285  int          _("The signature is BAD!"),
286  count_insecure_elgkeys (void)          _("The signature could not be checked due to a missing key"),
287  {          _("No valid OpenPGP signature"),
288      gpg_keycache_t pc;          _("Signature Error"),
289      gpgme_key_t key;          _("Good signature (Expired Key)"),
290      int n=0;          _("Good signature (Revoked Key)"),
291            _("Good signature (Expired)"),
292      pc = keycache_get_ctx (1);          NULL
293      if (!pc)      };
294          BUG (0);      const unsigned int mask = 9;
295      while (!gpg_keycache_next_key (pc, 0, &key)) {  
296          if (key->subkeys->pubkey_algo == GPGME_PK_ELG)      return gpg_sigstat[sigsum_to_index (sum) % mask];
297              n++;  }
298      }  
299      gpg_keycache_rewind (pc);  
300      return n;  /* Return true if at least one secret key is available. */
301  }  bool
302    secret_key_available (void)
303    {
304        if (!sec || gpg_keycache_get_size (sec) == 0)
305            return false;
306        return true;
307    }
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