RSSyl: Allow use of .netrc by libcurl. Bug/enhancement #3309, by Vincent Pelletier
[claws.git] / src / plugins / pgpcore / sgpgme.c
1 /*
2  * Claws Mail -- a GTK+ based, lightweight, and fast e-mail client
3  * Copyright (C) 1999-2014 the Claws Mail team
4  *
5  * This program is free software; you can redistribute it and/or modify
6  * it under the terms of the GNU General Public License as published by
7  * the Free Software Foundation; either version 3 of the License, or
8  * (at your option) any later version.
9  *
10  * This program is distributed in the hope that it will be useful,
11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13  * GNU General Public License for more details.
14  *
15  * You should have received a copy of the GNU General Public License
16  * along with this program. If not, see <http://www.gnu.org/licenses/>.
17  * 
18  */
19  
20 #ifdef HAVE_CONFIG_H
21 #  include "config.h"
22 #include "claws-features.h"
23 #endif
24  
25 #ifdef USE_GPGME
26
27 #include <time.h>
28 #include <gtk/gtk.h>
29 #include <gpgme.h>
30 #include <glib.h>
31 #include <glib/gi18n.h>
32 #include <stdio.h>
33 #include <string.h>
34 #include <stdlib.h>
35 #include <errno.h>
36 #include <sys/types.h>
37 #ifndef G_OS_WIN32
38 #  include <sys/wait.h>
39 #endif
40 #if (defined(__DragonFly__) || defined(SOLARIS) || defined (__NetBSD__) || defined (__FreeBSD__) || defined (__OpenBSD__))
41 #  include <sys/signal.h>
42 #endif
43 #ifndef G_OS_WIN32
44 #include <sys/mman.h>
45 #endif
46 #if HAVE_LOCALE_H
47 #  include <locale.h>
48 #endif
49
50 #include "sgpgme.h"
51 #include "privacy.h"
52 #include "prefs_common.h"
53 #include "utils.h"
54 #include "alertpanel.h"
55 #include "passphrase.h"
56 #include "prefs_gpg.h"
57 #include "account.h"
58 #include "select-keys.h"
59
60 static void sgpgme_disable_all(void)
61 {
62     /* FIXME: set a flag, so that we don't bother the user with failed
63      * gpgme messages */
64 }
65
66 gpgme_verify_result_t sgpgme_verify_signature(gpgme_ctx_t ctx, gpgme_data_t sig, 
67                                         gpgme_data_t plain, gpgme_data_t dummy)
68 {
69         gpgme_verify_result_t status = NULL;
70         gpgme_error_t err;
71
72         if ((err = gpgme_op_verify(ctx, sig, plain, dummy)) != GPG_ERR_NO_ERROR) {
73                 debug_print("op_verify err %s\n", gpgme_strerror(err));
74                 privacy_set_error("%s", gpgme_strerror(err));
75                 return GINT_TO_POINTER(-GPG_ERR_SYSTEM_ERROR);
76         }
77         status = gpgme_op_verify_result(ctx);
78         if (status && status->signatures == NULL) {
79                 debug_print("no signature found\n");
80                 privacy_set_error(_("No signature found"));
81                 return GINT_TO_POINTER(-GPG_ERR_SYSTEM_ERROR);
82         }
83         return status;
84 }
85
86 SignatureStatus sgpgme_sigstat_gpgme_to_privacy(gpgme_ctx_t ctx, gpgme_verify_result_t status)
87 {
88         gpgme_signature_t sig = NULL;
89         
90         if (GPOINTER_TO_INT(status) == -GPG_ERR_SYSTEM_ERROR) {
91                 debug_print("system error\n");
92                 return SIGNATURE_CHECK_FAILED;
93         }
94
95         if (status == NULL) {
96                 debug_print("status == NULL\n");
97                 return SIGNATURE_UNCHECKED;
98         }
99         sig = status->signatures;
100
101         if (sig == NULL) {
102                 debug_print("sig == NULL\n");
103                 return SIGNATURE_UNCHECKED;
104         }
105
106         debug_print("err code %d\n", gpg_err_code(sig->status));
107         switch (gpg_err_code(sig->status)) {
108         case GPG_ERR_NO_ERROR:
109                 switch (sig->validity) {
110                 case GPGME_VALIDITY_NEVER:
111                         return SIGNATURE_INVALID;
112                 case GPGME_VALIDITY_UNKNOWN:
113                 case GPGME_VALIDITY_UNDEFINED:
114                 case GPGME_VALIDITY_MARGINAL:
115                 case GPGME_VALIDITY_FULL:
116                 case GPGME_VALIDITY_ULTIMATE:
117                         return SIGNATURE_OK;
118                 default:
119                         return SIGNATURE_CHECK_FAILED;
120                 }
121         case GPG_ERR_SIG_EXPIRED:
122         case GPG_ERR_CERT_REVOKED:
123                 return SIGNATURE_WARN;
124         case GPG_ERR_KEY_EXPIRED:
125                 return SIGNATURE_KEY_EXPIRED;
126         case GPG_ERR_BAD_SIGNATURE:
127                 return SIGNATURE_INVALID;
128         case GPG_ERR_NO_PUBKEY:
129                 return SIGNATURE_CHECK_FAILED;
130         default:
131                 return SIGNATURE_CHECK_FAILED;
132         }
133         return SIGNATURE_CHECK_FAILED;
134 }
135
136 static const gchar *get_validity_str(unsigned long validity)
137 {
138         switch (gpg_err_code(validity)) {
139         case GPGME_VALIDITY_UNKNOWN:
140                 return _("Unknown");
141         case GPGME_VALIDITY_UNDEFINED:
142                 return _("Undefined");
143         case GPGME_VALIDITY_NEVER:
144                 return _("Never");
145         case GPGME_VALIDITY_MARGINAL:
146                 return _("Marginal");
147         case GPGME_VALIDITY_FULL:
148                 return _("Full");
149         case GPGME_VALIDITY_ULTIMATE:
150                 return _("Ultimate");
151         default:
152                 return _("Error");
153         }
154 }
155
156 static const gchar *get_owner_trust_str(unsigned long owner_trust)
157 {
158         switch (gpgme_err_code(owner_trust)) {
159         case GPGME_VALIDITY_NEVER:
160                 return _("Untrusted");
161         case GPGME_VALIDITY_MARGINAL:
162                 return _("Marginal");
163         case GPGME_VALIDITY_FULL:
164                 return _("Full");
165         case GPGME_VALIDITY_ULTIMATE:
166                 return _("Ultimate");
167         default:
168                 return _("Unknown");
169         }
170 }
171
172 static gchar *extract_name(const char *uid)
173 {
174         if (uid == NULL)
175                 return NULL;
176         if (!strncmp(uid, "CN=", 3)) {
177                 gchar *result = g_strdup(uid+3);
178                 if (strstr(result, ","))
179                         *(strstr(result, ",")) = '\0';
180                 return result;
181         } else if (strstr(uid, ",CN=")) {
182                 gchar *result = g_strdup(strstr(uid, ",CN=")+4);
183                 if (strstr(result, ","))
184                         *(strstr(result, ",")) = '\0';
185                 return result;
186         } else {
187                 return g_strdup(uid);
188         }
189 }
190 gchar *sgpgme_sigstat_info_short(gpgme_ctx_t ctx, gpgme_verify_result_t status)
191 {
192         gpgme_signature_t sig = NULL;
193         gchar *uname = NULL;
194         gpgme_key_t key;
195         gchar *result = NULL;
196         gpgme_error_t err = 0;
197         static gboolean warned = FALSE;
198
199         if (GPOINTER_TO_INT(status) == -GPG_ERR_SYSTEM_ERROR) {
200                 return g_strdup_printf(_("The signature can't be checked - %s"), privacy_get_error());
201         }
202
203         if (status == NULL) {
204                 return g_strdup(_("The signature has not been checked."));
205         }
206         sig = status->signatures;
207         if (sig == NULL) {
208                 return g_strdup(_("The signature has not been checked."));
209         }
210
211         err = gpgme_get_key(ctx, sig->fpr, &key, 0);
212         if (gpg_err_code(err) == GPG_ERR_NO_AGENT) {
213                 if (!warned)
214                         alertpanel_error(_("PGP Core: Can't get key - no gpg-agent running."));
215                 else
216                         g_warning(_("PGP Core: Can't get key - no gpg-agent running."));
217                 warned = TRUE;
218         } else if (gpg_err_code(err) != GPG_ERR_NO_ERROR && gpg_err_code(err) != GPG_ERR_EOF) {
219                 return g_strdup_printf(_("The signature can't be checked - %s"), 
220                         gpgme_strerror(err));
221         }
222         if (key)
223                 uname = extract_name(key->uids->uid);
224         else
225                 uname = g_strdup("<?>");
226         switch (gpg_err_code(sig->status)) {
227         case GPG_ERR_NO_ERROR:
228                 result = g_strdup_printf(_("Good signature from %s."), uname);
229                 break;
230         case GPG_ERR_SIG_EXPIRED:
231                 result = g_strdup_printf(_("Expired signature from %s."), uname);
232                 break;
233         case GPG_ERR_KEY_EXPIRED:
234                 result = g_strdup_printf(_("Good signature from %s, but the key has expired."), uname);
235                 break;
236         case GPG_ERR_CERT_REVOKED:
237                 result = g_strdup_printf(_("Good signature from %s, but the key has been revoked."), uname);
238                 break;
239         case GPG_ERR_BAD_SIGNATURE:
240                 result = g_strdup_printf(_("Bad signature from %s."), uname);
241                 break;
242         case GPG_ERR_NO_PUBKEY: {
243                 gchar *id = g_strdup(sig->fpr + strlen(sig->fpr)-8);
244                 result = g_strdup_printf(_("Key 0x%s not available to verify this signature."), id);
245                 g_free(id);
246                 break;
247                 }
248         default:
249                 result = g_strdup(_("The signature has not been checked."));
250                 break;
251         }
252         if (result == NULL)
253                 result = g_strdup(_("Error"));
254         g_free(uname);
255         return result;
256 }
257
258 gchar *sgpgme_sigstat_info_full(gpgme_ctx_t ctx, gpgme_verify_result_t status)
259 {
260         gint i = 0;
261         gchar *ret;
262         GString *siginfo;
263         gpgme_signature_t sig = NULL;
264
265         siginfo = g_string_sized_new(64);
266         if (status == NULL) {
267                 g_string_append_printf(siginfo,
268                         _("Error checking signature: no status\n"));
269                 goto bail;
270          }
271
272         sig = status->signatures;
273         
274         while (sig) {
275                 char buf[100];
276                 struct tm lt;
277                 gpgme_user_id_t user = NULL;
278                 gpgme_key_t key;
279                 gpgme_error_t err;
280                 const gchar *keytype, *keyid, *uid;
281                 
282                 err = gpgme_get_key(ctx, sig->fpr, &key, 0);
283
284                 if (err != GPG_ERR_NO_ERROR) {
285                         key = NULL;
286                         g_string_append_printf(siginfo, 
287                                 _("Error checking signature: %s\n"),
288                                 gpgme_strerror(err));
289                         goto bail;
290                 }
291                 if (key) {
292                         user = key->uids;
293                         keytype = gpgme_pubkey_algo_name(
294                                         key->subkeys->pubkey_algo);
295                         keyid = key->subkeys->keyid;
296                         uid = user->uid;
297                 } else {
298                         keytype = "?";
299                         keyid = "?";
300                         uid = "?";
301                 }
302
303                 memset(buf, 0, sizeof(buf));
304                 fast_strftime(buf, sizeof(buf)-1, prefs_common_get_prefs()->date_format, localtime_r(&sig->timestamp, &lt));
305                 g_string_append_printf(siginfo,
306                         _("Signature made on %s using %s key ID %s\n"),
307                         buf, keytype, keyid);
308                 
309                 switch (gpg_err_code(sig->status)) {
310                 case GPG_ERR_NO_ERROR:
311                         g_string_append_printf(siginfo,
312                                 _("Good signature from uid \"%s\" (Validity: %s)\n"),
313                                 uid, get_validity_str(user?user->validity:GPGME_VALIDITY_UNKNOWN));
314                         break;
315                 case GPG_ERR_KEY_EXPIRED:
316                         g_string_append_printf(siginfo,
317                                 _("Expired key uid \"%s\"\n"),
318                                 uid);
319                         break;
320                 case GPG_ERR_SIG_EXPIRED:
321                         g_string_append_printf(siginfo,
322                                 _("Expired signature from uid \"%s\" (Validity: %s)\n"),
323                                 uid, get_validity_str(user?user->validity:GPGME_VALIDITY_UNKNOWN));
324                         break;
325                 case GPG_ERR_CERT_REVOKED:
326                         g_string_append_printf(siginfo,
327                                 _("Revoked key uid \"%s\"\n"),
328                                 uid);
329                         break;
330                 case GPG_ERR_BAD_SIGNATURE:
331                         g_string_append_printf(siginfo,
332                                 _("BAD signature from \"%s\"\n"),
333                                 uid);
334                         break;
335                 default:
336                         break;
337                 }
338                 if (sig->status != GPG_ERR_BAD_SIGNATURE) {
339                         gint j = 1;
340                         user = user ? user->next : NULL;
341                         while (user != NULL) {
342                                 g_string_append_printf(siginfo,
343                                         _("                    uid \"%s\" (Validity: %s)\n"),
344                                         user->uid,
345                                         user->revoked==TRUE?_("Revoked"):get_validity_str(user->validity));
346                                 j++;
347                                 user = user->next;
348                         }
349                         g_string_append_printf(siginfo,_("Owner Trust: %s\n"),
350                                                get_owner_trust_str(key->owner_trust));
351                         g_string_append(siginfo,
352                                 _("Primary key fingerprint:"));
353                         const char* primary_fpr = NULL;
354                         if (key && key->subkeys && key->subkeys->fpr)
355                                 primary_fpr = key->subkeys->fpr;
356                         else
357                                 g_string_append(siginfo, " ?");
358                         int idx; /* now pretty-print the fingerprint */
359                         for (idx=0; primary_fpr && *primary_fpr!='\0'; idx++, primary_fpr++) {
360                                 if (idx%4==0)
361                                         g_string_append_c(siginfo, ' ');
362                                 if (idx%20==0)
363                                         g_string_append_c(siginfo, ' ');
364                                 g_string_append_c(siginfo, (gchar)*primary_fpr);
365                         }
366                         g_string_append_c(siginfo, '\n');
367 #ifdef HAVE_GPGME_PKA_TRUST
368                         if (sig->pka_trust == 1 && sig->pka_address) {
369                                 g_string_append_printf(siginfo,
370                                    _("WARNING: Signer's address \"%s\" "
371                                       "does not match DNS entry\n"), 
372                                    sig->pka_address);
373                         }
374                         else if (sig->pka_trust == 2 && sig->pka_address) {
375                                 g_string_append_printf(siginfo,
376                                    _("Verified signer's address is \"%s\"\n"),
377                                    sig->pka_address);
378                                 /* FIXME: Compare the address to the
379                                  * From: address.  */
380                         }
381 #endif /*HAVE_GPGME_PKA_TRUST*/
382                 }
383
384                 g_string_append(siginfo, "\n");
385                 i++;
386                 sig = sig->next;
387         }
388 bail:
389         ret = siginfo->str;
390         g_string_free(siginfo, FALSE);
391         return ret;
392 }
393
394 gpgme_data_t sgpgme_data_from_mimeinfo(MimeInfo *mimeinfo)
395 {
396         gpgme_data_t data = NULL;
397         gpgme_error_t err;
398         FILE *fp = g_fopen(mimeinfo->data.filename, "rb");
399
400         if (!fp) 
401                 return NULL;
402
403         err = gpgme_data_new_from_filepart(&data, NULL, fp, mimeinfo->offset, mimeinfo->length);
404         fclose(fp);
405
406         debug_print("data %p (%d %d)\n", (void *)&data, mimeinfo->offset, mimeinfo->length);
407         if (err) {
408                 debug_print ("gpgme_data_new_from_file failed: %s\n",
409                              gpgme_strerror (err));
410                 privacy_set_error(_("Couldn't get data from message, %s"), gpgme_strerror(err));
411                 return NULL;
412         }
413         return data;
414 }
415
416 gpgme_data_t sgpgme_decrypt_verify(gpgme_data_t cipher, gpgme_verify_result_t *status, gpgme_ctx_t ctx)
417 {
418         struct passphrase_cb_info_s info;
419         gpgme_data_t plain;
420         gpgme_error_t err;
421
422         memset (&info, 0, sizeof info);
423         
424         if ((err = gpgme_data_new(&plain)) != GPG_ERR_NO_ERROR) {
425                 gpgme_release(ctx);
426                 privacy_set_error(_("Couldn't initialize data, %s"), gpgme_strerror(err));
427                 return NULL;
428         }
429         
430         if (gpgme_get_protocol(ctx) == GPGME_PROTOCOL_OpenPGP) {
431                 prefs_gpg_enable_agent(prefs_gpg_get_config()->use_gpg_agent);
432                 if (!getenv("GPG_AGENT_INFO") || !prefs_gpg_get_config()->use_gpg_agent) {
433                         info.c = ctx;
434                         gpgme_set_passphrase_cb (ctx, gpgmegtk_passphrase_cb, &info);
435                 }
436         } else {
437                 prefs_gpg_enable_agent(TRUE);
438                 info.c = ctx;
439                 gpgme_set_passphrase_cb (ctx, NULL, &info);
440         }
441         
442         
443         if (gpgme_get_protocol(ctx) == GPGME_PROTOCOL_OpenPGP) {
444                 err = gpgme_op_decrypt_verify(ctx, cipher, plain);
445                 if (err != GPG_ERR_NO_ERROR) {
446                         debug_print("can't decrypt (%s)\n", gpgme_strerror(err));
447                         privacy_set_error("%s", gpgme_strerror(err));
448                         gpgmegtk_free_passphrase();
449                         gpgme_data_release(plain);
450                         return NULL;
451                 }
452
453                 err = cm_gpgme_data_rewind(plain);
454                 if (err) {
455                         debug_print("can't seek (%d %d %s)\n", err, errno, strerror(errno));
456                 }
457
458                 debug_print("decrypted.\n");
459                 *status = gpgme_op_verify_result (ctx);
460         } else {
461                 err = gpgme_op_decrypt(ctx, cipher, plain);
462                 if (err != GPG_ERR_NO_ERROR) {
463                         debug_print("can't decrypt (%s)\n", gpgme_strerror(err));
464                         privacy_set_error("%s", gpgme_strerror(err));
465                         gpgmegtk_free_passphrase();
466                         gpgme_data_release(plain);
467                         return NULL;
468                 }
469
470                 err = cm_gpgme_data_rewind(plain);
471                 if (err) {
472                         debug_print("can't seek (%d %d %s)\n", err, errno, strerror(errno));
473                 }
474
475                 debug_print("decrypted.\n");
476                 *status = gpgme_op_verify_result (ctx);
477         }
478         return plain;
479 }
480
481 gchar *sgpgme_get_encrypt_data(GSList *recp_names, gpgme_protocol_t proto)
482 {
483         SelectionResult result = KEY_SELECTION_CANCEL;
484         gpgme_key_t *keys = gpgmegtk_recipient_selection(recp_names, &result,
485                                 proto);
486         gchar *ret = NULL;
487         int i = 0;
488
489         if (!keys) {
490                 if (result == KEY_SELECTION_DONT)
491                         return g_strdup("_DONT_ENCRYPT_");
492                 else
493                         return NULL;
494         }
495         while (keys[i]) {
496                 gpgme_subkey_t skey = keys[i]->subkeys;
497                 gchar *fpr = skey->fpr;
498                 gchar *tmp = NULL;
499                 debug_print("adding %s\n", fpr);
500                 tmp = g_strconcat(ret?ret:"", fpr, " ", NULL);
501                 g_free(ret);
502                 ret = tmp;
503                 i++;
504         }
505         return ret;
506 }
507
508 gboolean sgpgme_setup_signers(gpgme_ctx_t ctx, PrefsAccount *account,
509                               const gchar *from_addr)
510 {
511         GPGAccountConfig *config;
512         const gchar *signer_addr = account->address;
513
514         gpgme_signers_clear(ctx);
515
516         if (from_addr)
517                 signer_addr = from_addr;
518         config = prefs_gpg_account_get_config(account);
519
520         switch(config->sign_key) {
521         case SIGN_KEY_DEFAULT:
522                 debug_print("using default gnupg key\n");
523                 break;
524         case SIGN_KEY_BY_FROM:
525                 debug_print("using key for %s\n", signer_addr);
526                 break;
527         case SIGN_KEY_CUSTOM:
528                 debug_print("using key for %s\n", config->sign_key_id);
529                 break;
530         }
531
532         if (config->sign_key != SIGN_KEY_DEFAULT) {
533                 const gchar *keyid;
534                 gpgme_key_t key, found_key;
535                 gpgme_error_t err;
536
537                 if (config->sign_key == SIGN_KEY_BY_FROM)
538                         keyid = signer_addr;
539                 else if (config->sign_key == SIGN_KEY_CUSTOM)
540                         keyid = config->sign_key_id;
541                 else
542                         goto bail;
543
544                 found_key = NULL;
545                 /* Look for any key, not just private ones, or GPGMe doesn't
546                  * correctly set the revoked flag. */
547                 err = gpgme_op_keylist_start(ctx, keyid, 0);
548                 while ((err = gpgme_op_keylist_next(ctx, &key)) == 0) {
549                         if (key == NULL)
550                                 continue;
551
552                         if (!key->can_sign)
553                                 continue;
554
555                         if (key->protocol != gpgme_get_protocol(ctx)) {
556                                 debug_print("skipping a key (wrong protocol %d)\n", key->protocol);
557                                 gpgme_key_release(key);
558                                 continue;
559                         }
560
561                         if (key->expired) {
562                                 debug_print("skipping a key, expired");
563                                 gpgme_key_release(key);
564                                 continue;
565                         }
566                         if (key->revoked) {
567                                 debug_print("skipping a key, revoked");
568                                 gpgme_key_release(key);
569                                 continue;
570                         }
571                         if (key->disabled) {
572                                 debug_print("skipping a key, disabled");
573                                 gpgme_key_release(key);
574                                 continue;
575                         }
576
577                         if (found_key != NULL) {
578                                 gpgme_key_release(key);
579                                 gpgme_op_keylist_end(ctx);
580                                 g_warning("ambiguous specification of secret key '%s'\n", keyid);
581                                 privacy_set_error(_("Secret key specification is ambiguous"));
582                                 goto bail;
583                         }
584
585                         found_key = key;
586                 }
587                 gpgme_op_keylist_end(ctx);
588
589                 if (found_key == NULL) {
590                         g_warning("setup_signers start: %s", gpgme_strerror(err));
591                         privacy_set_error(_("Secret key not found (%s)"), gpgme_strerror(err));
592                         goto bail;
593                 }
594
595                 err = gpgme_signers_add(ctx, found_key);
596                 debug_print("got key (proto %d (pgp %d, smime %d).\n",
597                             found_key->protocol, GPGME_PROTOCOL_OpenPGP,
598                             GPGME_PROTOCOL_CMS);
599                 gpgme_key_release(found_key);
600
601                 if (err) {
602                         g_warning("error adding secret key: %s\n",
603                                   gpgme_strerror(err));
604                         privacy_set_error(_("Error setting secret key: %s"),
605                                           gpgme_strerror(err));
606                         goto bail;
607                 }
608         }
609
610         prefs_gpg_account_free_config(config);
611
612         return TRUE;
613 bail:
614         prefs_gpg_account_free_config(config);
615         return FALSE;
616 }
617
618 void sgpgme_init()
619 {
620         gchar *ctype_locale = NULL, *messages_locale = NULL;
621         gchar *ctype_utf8_locale = NULL, *messages_utf8_locale = NULL;
622
623         gpgme_engine_info_t engineInfo;
624         if (gpgme_check_version("1.0.0")) {
625 #ifdef LC_CTYPE
626                 debug_print("setting gpgme CTYPE locale\n");
627 #ifdef G_OS_WIN32
628                 ctype_locale = g_win32_getlocale();
629 #else
630                 ctype_locale = g_strdup(setlocale(LC_CTYPE, NULL));
631 #endif
632                 if (ctype_locale) {
633                         debug_print("setting gpgme CTYPE locale to: %s\n", ctype_locale);
634                         if (strchr(ctype_locale, '.'))
635                                 *(strchr(ctype_locale, '.')) = '\0';
636                         else if (strchr(ctype_locale, '@'))
637                                 *(strchr(ctype_locale, '@')) = '\0';
638                         ctype_utf8_locale = g_strconcat(ctype_locale, ".UTF-8", NULL);
639
640                         debug_print("setting gpgme locale to UTF8: %s\n", ctype_utf8_locale ? ctype_utf8_locale : "NULL");
641                         gpgme_set_locale(NULL, LC_CTYPE, ctype_utf8_locale);
642
643                         debug_print("done\n");
644                         g_free(ctype_utf8_locale);
645                         g_free(ctype_locale);
646                 } else {
647                         debug_print("couldn't set gpgme CTYPE locale\n");
648                 }
649 #endif
650 #ifdef LC_MESSAGES
651                 debug_print("setting gpgme MESSAGES locale\n");
652 #ifdef G_OS_WIN32
653                 messages_locale = g_win32_getlocale();
654 #else
655                 messages_locale = g_strdup(setlocale(LC_MESSAGES, NULL));
656 #endif
657                 if (messages_locale) {
658                         debug_print("setting gpgme MESSAGES locale to: %s\n", messages_locale);
659                         if (strchr(messages_locale, '.'))
660                                 *(strchr(messages_locale, '.')) = '\0';
661                         else if (strchr(messages_locale, '@'))
662                                 *(strchr(messages_locale, '@')) = '\0';
663                         messages_utf8_locale = g_strconcat(messages_locale, ".UTF-8", NULL);
664                         debug_print("setting gpgme locale to UTF8: %s\n", messages_utf8_locale ? messages_utf8_locale : "NULL");
665
666                         gpgme_set_locale(NULL, LC_MESSAGES, messages_utf8_locale);
667
668                         debug_print("done\n");
669                         g_free(messages_utf8_locale);
670                         g_free(messages_locale);
671                 } else {
672                         debug_print("couldn't set gpgme MESSAGES locale\n");
673                 }
674 #endif
675                 if (!gpgme_get_engine_info(&engineInfo)) {
676                         while (engineInfo) {
677                                 debug_print("GpgME Protocol: %s\n"
678                                             "Version: %s (req %s)\n"
679                                             "Executable: %s\n",
680                                         gpgme_get_protocol_name(engineInfo->protocol) ? gpgme_get_protocol_name(engineInfo->protocol):"???",
681                                         engineInfo->version ? engineInfo->version:"???",
682                                         engineInfo->req_version ? engineInfo->req_version:"???",
683                                         engineInfo->file_name ? engineInfo->file_name:"???");
684                                 if (engineInfo->protocol == GPGME_PROTOCOL_OpenPGP
685                                 &&  gpgme_engine_check_version(engineInfo->protocol) != 
686                                         GPG_ERR_NO_ERROR) {
687                                         if (engineInfo->file_name && !engineInfo->version) {
688                                                 alertpanel_error(_("Gpgme protocol '%s' is unusable: "
689                                                                    "Engine '%s' isn't installed properly."),
690                                                                    gpgme_get_protocol_name(engineInfo->protocol),
691                                                                    engineInfo->file_name);
692                                         } else if (engineInfo->file_name && engineInfo->version
693                                           && engineInfo->req_version) {
694                                                 alertpanel_error(_("Gpgme protocol '%s' is unusable: "
695                                                                    "Engine '%s' version %s is installed, "
696                                                                    "but version %s is required.\n"),
697                                                                    gpgme_get_protocol_name(engineInfo->protocol),
698                                                                    engineInfo->file_name,
699                                                                    engineInfo->version,
700                                                                    engineInfo->req_version);
701                                         } else {
702                                                 alertpanel_error(_("Gpgme protocol '%s' is unusable "
703                                                                    "(unknown problem)"),
704                                                                    gpgme_get_protocol_name(engineInfo->protocol));
705                                         }
706                                 }
707                                 engineInfo = engineInfo->next;
708                         }
709                 }
710         } else {
711                 sgpgme_disable_all();
712
713                 if (prefs_gpg_get_config()->gpg_warning) {
714                         AlertValue val;
715
716                         val = alertpanel_full
717                                 (_("Warning"),
718                                  _("GnuPG is not installed properly, or needs "
719                                  "to be upgraded.\n"
720                                  "OpenPGP support disabled."),
721                                  GTK_STOCK_CLOSE, NULL, NULL, TRUE, NULL,
722                                  ALERT_WARNING, G_ALERTDEFAULT);
723                         if (val & G_ALERTDISABLE)
724                                 prefs_gpg_get_config()->gpg_warning = FALSE;
725                 }
726         }
727 }
728
729 void sgpgme_done()
730 {
731         gpgmegtk_free_passphrase();
732 }
733
734 void sgpgme_create_secret_key(PrefsAccount *account, gboolean ask_create)
735 {
736         AlertValue val = G_ALERTDEFAULT;
737         gchar *key_parms = NULL;
738         gchar *name = NULL;
739         gchar *email = NULL;
740         gchar *passphrase = NULL, *passphrase_second = NULL;
741         gint prev_bad = 0;
742         gchar *tmp = NULL;
743         gpgme_error_t err = 0;
744         gpgme_ctx_t ctx;
745         GtkWidget *window = NULL;
746         gpgme_genkey_result_t key;
747
748         if (account == NULL)
749                 account = account_get_default();
750
751         if (account->address == NULL) {
752                 alertpanel_error(_("You have to save the account's information with \"OK\" "
753                                    "before being able to generate a key pair.\n"));
754                 return;
755         }
756         if (ask_create) {
757                 val = alertpanel(_("No PGP key found"),
758                                 _("Claws Mail did not find a secret PGP key, "
759                                   "which means that you won't be able to sign "
760                                   "emails or receive encrypted emails.\n"
761                                   "Do you want to create a new key pair now?"),
762                                   GTK_STOCK_NO, "+" GTK_STOCK_YES, NULL);
763                 if (val == G_ALERTDEFAULT) {
764                         prefs_gpg_get_config()->gpg_ask_create_key = FALSE;
765                         prefs_gpg_save_config();
766                         return;
767                 }
768         }
769
770         if (account->name) {
771                 name = g_strdup(account->name);
772         } else {
773                 name = g_strdup(account->address);
774         }
775         email = g_strdup(account->address);
776         tmp = g_strdup_printf("%s <%s>", account->name?account->name:account->address, account->address);
777 again:
778         passphrase = passphrase_mbox(tmp, NULL, prev_bad, 1);
779         if (passphrase == NULL) {
780                 g_free(tmp);
781                 g_free(email);
782                 g_free(name);           
783                 return;
784         }
785         passphrase_second = passphrase_mbox(tmp, NULL, 0, 2);
786         if (passphrase_second == NULL) {
787                 g_free(tmp);
788                 g_free(email);
789                 g_free(passphrase);             
790                 g_free(name);           
791                 return;
792         }
793         if (strcmp(passphrase, passphrase_second)) {
794                 g_free(passphrase);
795                 g_free(passphrase_second);
796                 prev_bad = 1;
797                 goto again;
798         }
799         
800         key_parms = g_strdup_printf("<GnupgKeyParms format=\"internal\">\n"
801                                         "Key-Type: RSA\n"
802                                         "Key-Length: 2048\n"
803                                         "Subkey-Type: RSA\n"
804                                         "Subkey-Length: 2048\n"
805                                         "Name-Real: %s\n"
806                                         "Name-Email: %s\n"
807                                         "Expire-Date: 0\n"
808                                         "%s%s%s"
809                                         "</GnupgKeyParms>\n",
810                                         name, email, 
811                                         strlen(passphrase)?"Passphrase: ":"",
812                                         passphrase,
813                                         strlen(passphrase)?"\n":"");
814 #ifndef G_PLATFORM_WIN32
815         if (mlock(passphrase, strlen(passphrase)) == -1)
816                 debug_print("couldn't lock passphrase\n");
817         if (mlock(passphrase_second, strlen(passphrase_second)) == -1)
818                 debug_print("couldn't lock passphrase2\n");
819 #endif
820         g_free(tmp);
821         g_free(email);
822         g_free(name);
823         g_free(passphrase_second);
824         g_free(passphrase);
825         
826         err = gpgme_new (&ctx);
827         if (err) {
828                 alertpanel_error(_("Couldn't generate a new key pair: %s"),
829                                  gpgme_strerror(err));
830                 g_free(key_parms);
831                 return;
832         }
833         
834
835         window = label_window_create(_("Generating your new key pair... Please move the mouse "
836                               "around to help generate entropy..."));
837
838         err = gpgme_op_genkey(ctx, key_parms, NULL, NULL);
839         g_free(key_parms);
840
841         label_window_destroy(window);
842
843         if (err) {
844                 alertpanel_error(_("Couldn't generate a new key pair: %s"), gpgme_strerror(err));
845                 gpgme_release(ctx);
846                 return;
847         }
848         key = gpgme_op_genkey_result(ctx);
849         if (key == NULL) {
850                 alertpanel_error(_("Couldn't generate a new key pair: unknown error"));
851                 gpgme_release(ctx);
852                 return;
853         } else {
854                 gchar *buf = g_strdup_printf(_("Your new key pair has been generated. "
855                                     "Its fingerprint is:\n%s\n\nDo you want to export it "
856                                     "to a keyserver?"),
857                                     key->fpr ? key->fpr:"null");
858                 AlertValue val = alertpanel(_("Key generated"), buf,
859                                   GTK_STOCK_NO, "+" GTK_STOCK_YES, NULL);
860                 g_free(buf);
861                 if (val == G_ALERTALTERNATE) {
862 #ifndef G_OS_WIN32
863                         gchar *cmd = g_strdup_printf("gpg --no-tty --send-keys %s", key->fpr);
864                         int res = 0;
865                         pid_t pid = 0;
866                         pid = fork();
867                         if (pid == -1) {
868                                 res = -1;
869                         } else if (pid == 0) {
870                                 /* son */
871                                 res = system(cmd);
872                                 res = WEXITSTATUS(res);
873                                 _exit(res);
874                         } else {
875                                 int status = 0;
876                                 time_t start_wait = time(NULL);
877                                 res = -1;
878                                 do {
879                                         if (waitpid(pid, &status, WNOHANG) == 0 || !WIFEXITED(status)) {
880                                                 usleep(200000);
881                                         } else {
882                                                 res = WEXITSTATUS(status);
883                                                 break;
884                                         }
885                                         if (time(NULL) - start_wait > 5) {
886                                                 debug_print("SIGTERM'ing gpg\n");
887                                                 kill(pid, SIGTERM);
888                                         }
889                                         if (time(NULL) - start_wait > 6) {
890                                                 debug_print("SIGKILL'ing gpg\n");
891                                                 kill(pid, SIGKILL);
892                                                 break;
893                                         }
894                                 } while(1);
895                         }
896                         if (res == 0) {
897                                 alertpanel_notice(_("Key exported."));
898                         } else {
899                                 alertpanel_error(_("Couldn't export key."));
900                         }
901                         g_free(cmd);
902 #else
903                         alertpanel_error(_("Key export isn't implemented in Windows."));
904 #endif
905                 }
906         }
907         prefs_gpg_get_config()->gpg_ask_create_key = FALSE;
908         prefs_gpg_save_config();
909         gpgme_release(ctx);
910 }
911
912 gboolean sgpgme_has_secret_key(void)
913 {
914         gpgme_error_t err = 0;
915         gpgme_ctx_t ctx;
916         gpgme_key_t key;
917
918         err = gpgme_new (&ctx);
919         if (err) {
920                 debug_print("err : %s\n", gpgme_strerror(err));
921                 return TRUE;
922         }
923 check_again:
924         err = gpgme_op_keylist_start(ctx, NULL, TRUE);
925         if (!err)
926                 err = gpgme_op_keylist_next(ctx, &key);
927         gpgme_op_keylist_end(ctx);
928         if (gpg_err_code(err) == GPG_ERR_EOF) {
929                 if (gpgme_get_protocol(ctx) != GPGME_PROTOCOL_CMS) {
930                         gpgme_set_protocol(ctx, GPGME_PROTOCOL_CMS);
931                         goto check_again;
932                 }
933                 gpgme_release(ctx);
934                 return FALSE;
935         } else {
936                 gpgme_release(ctx);
937                 return TRUE;
938         }
939 }
940
941 void sgpgme_check_create_key(void)
942 {
943         if (prefs_gpg_get_config()->gpg_ask_create_key &&
944             !sgpgme_has_secret_key()) {
945                 sgpgme_create_secret_key(NULL, TRUE);
946         } else {
947                 prefs_gpg_get_config()->gpg_ask_create_key = FALSE;
948                 prefs_gpg_save_config();
949         }       
950 }
951
952 void *sgpgme_data_release_and_get_mem(gpgme_data_t data, size_t *len)
953 {
954         char buf[BUFSIZ];
955         void *result = NULL;
956         ssize_t r = 0;
957         size_t w = 0;
958         
959         if (data == NULL)
960                 return NULL;
961         if (len == NULL)
962                 return NULL;
963
964         /* I know it's deprecated, but we don't compile with _LARGEFILE */
965         cm_gpgme_data_rewind(data);
966         while ((r = gpgme_data_read(data, buf, BUFSIZ)) > 0) {
967                 result = realloc(result, r + w);
968                 if (result == NULL) {
969                         g_warning("can't allocate memory\n");
970                         return NULL;
971                 }
972                 memcpy(result+w, buf, r);
973                 w += r;
974         }
975         
976         *len = w;
977
978         gpgme_data_release(data);
979         if (r < 0) {
980                 free(result);
981                 *len = 0;
982                 return NULL;
983         }
984         return result;
985 }
986
987 gpgme_error_t cm_gpgme_data_rewind(gpgme_data_t dh)
988 {
989 #if defined(_FILE_OFFSET_BITS) && _FILE_OFFSET_BITS == 64
990         if (gpgme_data_seek(dh, (off_t)0, SEEK_SET) == -1)
991                 return gpg_error_from_errno(errno);
992         else
993                 return 0;
994 #else
995         return gpgme_data_rewind(dh);
996 #endif
997 }
998
999 #endif /* USE_GPGME */