src/plugins/pgpcore/sgpgme.c

   1 /*
   2  * Claws Mail -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2009 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 #endif
  23
  24 #ifdef USE_GPGME
  25
  26 #include <time.h>
  27 #include <gtk/gtk.h>
  28 #include <gpgme.h>
  29 #include <glib.h>
  30 #include <glib/gi18n.h>
  31 #include <stdio.h>
  32 #include <string.h>
  33 #include <stdlib.h>
  34 #include <errno.h>
  35 #include <sys/types.h>
  36 #ifndef G_OS_WIN32
  37 #  include <sys/wait.h>
  38 #endif
  39 #if (defined(__DragonFly__) || defined(SOLARIS) || defined (__NetBSD__) || defined (__FreeBSD__) || defined (__OpenBSD__))
  40 #  include <sys/signal.h>
  41 #endif
  42 #ifndef G_OS_WIN32
  43 #include <sys/mman.h>
  44 #endif
  45 #if HAVE_LOCALE_H
  46 #  include <locale.h>
  47 #endif
  48
  49 #include "sgpgme.h"
  50 #include "privacy.h"
  51 #include "prefs_common.h"
  52 #include "utils.h"
  53 #include "alertpanel.h"
  54 #include "passphrase.h"
  55 #include "prefs_gpg.h"
  56 #include "account.h"
  57 #include "select-keys.h"
  58
  59 static void sgpgme_disable_all(void)
  60 {
  61     /* FIXME: set a flag, so that we don't bother the user with failed
  62      * gpgme messages */
  63 }
  64
  65 gpgme_verify_result_t sgpgme_verify_signature(gpgme_ctx_t ctx, gpgme_data_t sig,
  66                                         gpgme_data_t plain, gpgme_data_t dummy)
  67 {
  68         gpgme_verify_result_t status = NULL;
  69         gpgme_error_t err;
  70
  71         if ((err = gpgme_op_verify(ctx, sig, plain, dummy)) != GPG_ERR_NO_ERROR) {
  72                 debug_print("op_verify err %s\n", gpgme_strerror(err));
  73                 privacy_set_error("%s", gpgme_strerror(err));
  74                 return GINT_TO_POINTER(-GPG_ERR_SYSTEM_ERROR);
  75         }
  76         status = gpgme_op_verify_result(ctx);
  77         if (status && status->signatures == NULL) {
  78                 debug_print("no signature found\n");
  79                 privacy_set_error(_("No signature found"));
  80                 return GINT_TO_POINTER(-GPG_ERR_SYSTEM_ERROR);
  81         }
  82         return status;
  83 }
  84
  85 SignatureStatus sgpgme_sigstat_gpgme_to_privacy(gpgme_ctx_t ctx, gpgme_verify_result_t status)
  86 {
  87         unsigned long validity = 0;
  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         validity = sig->validity;
 106
 107         debug_print("err code %d\n", gpg_err_code(sig->status));
 108         switch (gpg_err_code(sig->status)) {
 109         case GPG_ERR_NO_ERROR:
 110                 switch (gpg_err_code(sig->validity)) {
 111                 case GPGME_VALIDITY_NEVER:
 112                         return SIGNATURE_INVALID;
 113                 case GPGME_VALIDITY_UNKNOWN:
 114                 case GPGME_VALIDITY_UNDEFINED:
 115                 case GPGME_VALIDITY_MARGINAL:
 116                 case GPGME_VALIDITY_FULL:
 117                 case GPGME_VALIDITY_ULTIMATE:
 118                         return SIGNATURE_OK;
 119                 default:
 120                         return SIGNATURE_CHECK_FAILED;
 121                 }
 122         case GPG_ERR_SIG_EXPIRED:
 123         case GPG_ERR_CERT_REVOKED:
 124                 return SIGNATURE_WARN;
 125         case GPG_ERR_KEY_EXPIRED:
 126                 return SIGNATURE_KEY_EXPIRED;
 127         case GPG_ERR_BAD_SIGNATURE:
 128                 return SIGNATURE_INVALID;
 129         case GPG_ERR_NO_PUBKEY:
 130                 return SIGNATURE_CHECK_FAILED;
 131         default:
 132                 return SIGNATURE_CHECK_FAILED;
 133         }
 134         return SIGNATURE_CHECK_FAILED;
 135 }
 136
 137 static const gchar *get_validity_str(unsigned long validity)
 138 {
 139         switch (gpg_err_code(validity)) {
 140         case GPGME_VALIDITY_UNKNOWN:
 141                 return _("Unknown");
 142         case GPGME_VALIDITY_UNDEFINED:
 143                 return _("Undefined");
 144         case GPGME_VALIDITY_NEVER:
 145                 return _("Never");
 146         case GPGME_VALIDITY_MARGINAL:
 147                 return _("Marginal");
 148         case GPGME_VALIDITY_FULL:
 149                 return _("Full");
 150         case GPGME_VALIDITY_ULTIMATE:
 151                 return _("Ultimate");
 152         default:
 153                 return _("Error");
 154         }
 155 }
 156
 157 static gchar *extract_name(const char *uid)
 158 {
 159         if (uid == NULL)
 160                 return NULL;
 161         if (!strncmp(uid, "CN=", 3)) {
 162                 gchar *result = g_strdup(uid+3);
 163                 if (strstr(result, ","))
 164                         *(strstr(result, ",")) = '\0';
 165                 return result;
 166         } else if (strstr(uid, ",CN=")) {
 167                 gchar *result = g_strdup(strstr(uid, ",CN=")+4);
 168                 if (strstr(result, ","))
 169                         *(strstr(result, ",")) = '\0';
 170                 return result;
 171         } else {
 172                 return g_strdup(uid);
 173         }
 174 }
 175 gchar *sgpgme_sigstat_info_short(gpgme_ctx_t ctx, gpgme_verify_result_t status)
 176 {
 177         gpgme_signature_t sig = NULL;
 178         gchar *uname = NULL;
 179         gpgme_key_t key;
 180         gchar *result = NULL;
 181         gpgme_error_t err = 0;
 182         static gboolean warned = FALSE;
 183
 184         if (GPOINTER_TO_INT(status) == -GPG_ERR_SYSTEM_ERROR) {
 185                 return g_strdup_printf(_("The signature can't be checked - %s"), privacy_get_error());
 186         }
 187
 188         if (status == NULL) {
 189                 return g_strdup(_("The signature has not been checked."));
 190         }
 191         sig = status->signatures;
 192         if (sig == NULL) {
 193                 return g_strdup(_("The signature has not been checked."));
 194         }
 195
 196         err = gpgme_get_key(ctx, sig->fpr, &key, 0);
 197         if (gpg_err_code(err) == GPG_ERR_NO_AGENT) {
 198                 if (!warned)
 199                         alertpanel_error(_("PGP Core: Can't get key - no gpg-agent running."));
 200                 else
 201                         g_warning(_("PGP Core: Can't get key - no gpg-agent running."));
 202                 warned = TRUE;
 203         } else if (gpg_err_code(err) != GPG_ERR_NO_ERROR && gpg_err_code(err) != GPG_ERR_EOF) {
 204                 return g_strdup_printf(_("The signature can't be checked - %s"),
 205                         gpgme_strerror(err));
 206         }
 207         if (key)
 208                 uname = extract_name(key->uids->uid);
 209         else
 210                 uname = g_strdup("<?>");
 211         switch (gpg_err_code(sig->status)) {
 212         case GPG_ERR_NO_ERROR:
 213                 switch (gpg_err_code(sig->validity)) {
 214                 case GPGME_VALIDITY_MARGINAL:
 215                 case GPGME_VALIDITY_FULL:
 216                 case GPGME_VALIDITY_ULTIMATE:
 217                         result = g_strdup_printf(_("Good signature from %s."), uname);
 218                         break;
 219                 case GPGME_VALIDITY_UNKNOWN:
 220                 case GPGME_VALIDITY_UNDEFINED:
 221                 case GPGME_VALIDITY_NEVER:
 222                 default:
 223                         result = g_strdup_printf(_("Good signature (untrusted) from %s."), uname);
 224                         break;
 225                 }
 226                 break;
 227         case GPG_ERR_SIG_EXPIRED:
 228                 result = g_strdup_printf(_("Expired signature from %s."), uname);
 229                 break;
 230         case GPG_ERR_KEY_EXPIRED:
 231                 result = g_strdup_printf(_("Expired key from %s."), uname);
 232                 break;
 233         case GPG_ERR_BAD_SIGNATURE:
 234                 result = g_strdup_printf(_("Bad signature from %s."), uname);
 235                 break;
 236         case GPG_ERR_NO_PUBKEY: {
 237                 gchar *id = g_strdup(sig->fpr + strlen(sig->fpr)-8);
 238                 result = g_strdup_printf(_("Key 0x%s not available to verify this signature."), id);
 239                 g_free(id);
 240                 break;
 241                 }
 242         default:
 243                 result = g_strdup(_("The signature has not been checked."));
 244                 break;
 245         }
 246         if (result == NULL)
 247                 result = g_strdup(_("Error"));
 248         g_free(uname);
 249         return result;
 250 }
 251
 252 gchar *sgpgme_sigstat_info_full(gpgme_ctx_t ctx, gpgme_verify_result_t status)
 253 {
 254         gint i = 0;
 255         gchar *ret;
 256         GString *siginfo;
 257         gpgme_signature_t sig = NULL;
 258
 259         siginfo = g_string_sized_new(64);
 260         if (status == NULL) {
 261                 g_string_append_printf(siginfo,
 262                         _("Error checking signature: no status\n"));
 263                 goto bail;
 264          }
 265
 266         sig = status->signatures;
 267
 268         while (sig) {
 269                 gpgme_user_id_t user = NULL;
 270                 gpgme_key_t key;
 271                 gpgme_error_t err;
 272                 const gchar *keytype, *keyid, *uid;
 273
 274                 err = gpgme_get_key(ctx, sig->fpr, &key, 0);
 275
 276                 if (err != GPG_ERR_NO_ERROR) {
 277                         key = NULL;
 278                         g_string_append_printf(siginfo,
 279                                 _("Error checking signature: %s\n"),
 280                                 gpgme_strerror(err));
 281                         goto bail;
 282                 }
 283                 if (key) {
 284                         user = key->uids;
 285                         keytype = gpgme_pubkey_algo_name(
 286                                         key->subkeys->pubkey_algo);
 287                         keyid = key->subkeys->keyid;
 288                         uid = user->uid;
 289                 } else {
 290                         keytype = "?";
 291                         keyid = "?";
 292                         uid = "?";
 293                 }
 294                 g_string_append_printf(siginfo,
 295                         _("Signature made using %s key ID %s\n"),
 296                         keytype, keyid);
 297
 298                 switch (gpg_err_code(sig->status)) {
 299                 case GPG_ERR_NO_ERROR:
 300                 case GPG_ERR_KEY_EXPIRED:
 301                         g_string_append_printf(siginfo,
 302                                 _("Good signature from uid \"%s\" (Validity: %s)\n"),
 303                                 uid, get_validity_str(user?user->validity:GPGME_VALIDITY_UNKNOWN));
 304                         break;
 305                 case GPG_ERR_SIG_EXPIRED:
 306                         g_string_append_printf(siginfo,
 307                                 _("Expired signature from uid \"%s\" (Validity: %s)\n"),
 308                                 uid, get_validity_str(user?user->validity:GPGME_VALIDITY_UNKNOWN));
 309                         break;
 310                 case GPG_ERR_BAD_SIGNATURE:
 311                         g_string_append_printf(siginfo,
 312                                 _("BAD signature from \"%s\"\n"),
 313                                 uid);
 314                         break;
 315                 default:
 316                         break;
 317                 }
 318                 if (sig->status != GPG_ERR_BAD_SIGNATURE) {
 319                         gint j = 1;
 320                         user = user ? user->next : NULL;
 321                         while (user != NULL) {
 322                                 g_string_append_printf(siginfo,
 323                                         _("                    uid \"%s\" (Validity: %s)\n"),
 324                                         user->uid,
 325                                         get_validity_str(user->validity));
 326                                 j++;
 327                                 user = user->next;
 328                         }
 329                         g_string_append_printf(siginfo,
 330                                 _("Primary key fingerprint: %s\n"),
 331                                 sig ? sig->fpr: "?");
 332 #ifdef HAVE_GPGME_PKA_TRUST
 333                         if (sig->pka_trust == 1 && sig->pka_address) {
 334                                 g_string_append_printf(siginfo,
 335                                    _("WARNING: Signer's address \"%s\" "
 336                                       "does not match DNS entry\n"),
 337                                    sig->pka_address);
 338                         }
 339                         else if (sig->pka_trust == 2 && sig->pka_address) {
 340                                 g_string_append_printf(siginfo,
 341                                    _("Verified signer's address is \"%s\"\n"),
 342                                    sig->pka_address);
 343                                 /* FIXME: Compare the address to the
 344                                  * From: address.  */
 345                         }
 346 #endif /*HAVE_GPGME_PKA_TRUST*/
 347                 }
 348
 349                 g_string_append(siginfo, "\n");
 350                 i++;
 351                 sig = sig->next;
 352         }
 353 bail:
 354         ret = siginfo->str;
 355         g_string_free(siginfo, FALSE);
 356         return ret;
 357 }
 358
 359 gpgme_data_t sgpgme_data_from_mimeinfo(MimeInfo *mimeinfo)
 360 {
 361         gpgme_data_t data = NULL;
 362         gpgme_error_t err;
 363         FILE *fp = g_fopen(mimeinfo->data.filename, "rb");
 364         gchar *tmp_file = NULL;
 365
 366         if (!fp)
 367                 return NULL;
 368
 369         tmp_file = get_tmp_file();
 370         copy_file_part(fp, mimeinfo->offset, mimeinfo->length, tmp_file);
 371         fclose(fp);
 372         fp = NULL;
 373         debug_print("tmp file %s\n", tmp_file);
 374
 375         err = gpgme_data_new_from_file(&data, tmp_file, 1);
 376         claws_unlink(tmp_file);
 377         g_free(tmp_file);
 378
 379         debug_print("data %p (%d %d)\n", (void *)&data, mimeinfo->offset, mimeinfo->length);
 380         if (err) {
 381                 debug_print ("gpgme_data_new_from_file failed: %s\n",
 382                              gpgme_strerror (err));
 383                 privacy_set_error(_("Couldn't get data from message, %s"), gpgme_strerror(err));
 384                 return NULL;
 385         }
 386         return data;
 387 }
 388
 389 gpgme_data_t sgpgme_decrypt_verify(gpgme_data_t cipher, gpgme_verify_result_t *status, gpgme_ctx_t ctx)
 390 {
 391         struct passphrase_cb_info_s info;
 392         gpgme_data_t plain;
 393         gpgme_error_t err;
 394
 395         memset (&info, 0, sizeof info);
 396
 397         if ((err = gpgme_data_new(&plain)) != GPG_ERR_NO_ERROR) {
 398                 gpgme_release(ctx);
 399                 privacy_set_error(_("Couldn't initialize data, %s"), gpgme_strerror(err));
 400                 return NULL;
 401         }
 402
 403         if (gpgme_get_protocol(ctx) == GPGME_PROTOCOL_OpenPGP) {
 404                 prefs_gpg_enable_agent(prefs_gpg_get_config()->use_gpg_agent);
 405                 if (!getenv("GPG_AGENT_INFO") || !prefs_gpg_get_config()->use_gpg_agent) {
 406                         info.c = ctx;
 407                         gpgme_set_passphrase_cb (ctx, gpgmegtk_passphrase_cb, &info);
 408                 }
 409         } else {
 410                 prefs_gpg_enable_agent(TRUE);
 411                 info.c = ctx;
 412                 gpgme_set_passphrase_cb (ctx, NULL, &info);
 413         }
 414
 415
 416         if (gpgme_get_protocol(ctx) == GPGME_PROTOCOL_OpenPGP) {
 417                 err = gpgme_op_decrypt_verify(ctx, cipher, plain);
 418                 if (err != GPG_ERR_NO_ERROR) {
 419                         debug_print("can't decrypt (%s)\n", gpgme_strerror(err));
 420                         privacy_set_error("%s", gpgme_strerror(err));
 421                         gpgmegtk_free_passphrase();
 422                         gpgme_data_release(plain);
 423                         return NULL;
 424                 }
 425
 426                 err = cm_gpgme_data_rewind(plain);
 427                 if (err) {
 428                         debug_print("can't seek (%d %d %s)\n", err, errno, strerror(errno));
 429                 }
 430
 431                 debug_print("decrypted.\n");
 432                 *status = gpgme_op_verify_result (ctx);
 433         } else {
 434                 err = gpgme_op_decrypt(ctx, cipher, plain);
 435                 if (err != GPG_ERR_NO_ERROR) {
 436                         debug_print("can't decrypt (%s)\n", gpgme_strerror(err));
 437                         privacy_set_error("%s", gpgme_strerror(err));
 438                         gpgmegtk_free_passphrase();
 439                         gpgme_data_release(plain);
 440                         return NULL;
 441                 }
 442
 443                 err = cm_gpgme_data_rewind(plain);
 444                 if (err) {
 445                         debug_print("can't seek (%d %d %s)\n", err, errno, strerror(errno));
 446                 }
 447
 448                 debug_print("decrypted.\n");
 449                 *status = gpgme_op_verify_result (ctx);
 450         }
 451         return plain;
 452 }
 453
 454 gchar *sgpgme_get_encrypt_data(GSList *recp_names, gpgme_protocol_t proto)
 455 {
 456         SelectionResult result = KEY_SELECTION_CANCEL;
 457         gpgme_key_t *keys = gpgmegtk_recipient_selection(recp_names, &result,
 458                                 proto);
 459         gchar *ret = NULL;
 460         int i = 0;
 461
 462         if (!keys) {
 463                 if (result == KEY_SELECTION_DONT)
 464                         return g_strdup("_DONT_ENCRYPT_");
 465                 else
 466                         return NULL;
 467         }
 468         while (keys[i]) {
 469                 gpgme_subkey_t skey = keys[i]->subkeys;
 470                 gchar *fpr = skey->fpr;
 471                 gchar *tmp = NULL;
 472                 debug_print("adding %s\n", fpr);
 473                 tmp = g_strconcat(ret?ret:"", fpr, " ", NULL);
 474                 g_free(ret);
 475                 ret = tmp;
 476                 i++;
 477         }
 478         return ret;
 479 }
 480
 481 gboolean sgpgme_setup_signers(gpgme_ctx_t ctx, PrefsAccount *account,
 482                               const gchar *from_addr)
 483 {
 484         GPGAccountConfig *config;
 485         const gchar *signer_addr = account->address;
 486
 487         gpgme_signers_clear(ctx);
 488
 489         if (from_addr)
 490                 signer_addr = from_addr;
 491         config = prefs_gpg_account_get_config(account);
 492
 493         switch(config->sign_key) {
 494         case SIGN_KEY_DEFAULT:
 495                 debug_print("using default gnupg key\n");
 496                 break;
 497         case SIGN_KEY_BY_FROM:
 498                 debug_print("using key for %s\n", signer_addr);
 499                 break;
 500         case SIGN_KEY_CUSTOM:
 501                 debug_print("using key for %s\n", config->sign_key_id);
 502                 break;
 503         }
 504
 505         if (config->sign_key != SIGN_KEY_DEFAULT) {
 506                 const gchar *keyid;
 507                 gpgme_key_t key, key2;
 508                 gpgme_error_t err;
 509
 510                 if (config->sign_key == SIGN_KEY_BY_FROM)
 511                         keyid = signer_addr;
 512                 else if (config->sign_key == SIGN_KEY_CUSTOM)
 513                         keyid = config->sign_key_id;
 514                 else
 515                         goto bail;
 516
 517                 err = gpgme_op_keylist_start(ctx, keyid, 1);
 518                 if (!err) {
 519                         do {
 520                                 err = gpgme_op_keylist_next(ctx, &key);
 521                                 if (!err && key && key->protocol == gpgme_get_protocol(ctx) &&
 522                                     !key->expired && !key->revoked && !key->disabled)
 523                                         break;
 524                                 if (!err && key && key->protocol != gpgme_get_protocol(ctx)) {
 525                                         debug_print("skipping a key (wrong protocol %d)\n", key->protocol);
 526                                         gpgme_key_release(key);
 527                                 }
 528                                 if (!err && key && (key->expired || key->revoked || key->disabled)) {
 529
 530                                         debug_print("skipping a key");
 531                                         if (key->expired)
 532                                                 debug_print(" expired");
 533                                         if (key->revoked)
 534                                                 debug_print(" revoked");
 535                                         if (key->disabled)
 536                                                 debug_print(" disabled");
 537                                         debug_print("\n");
 538                                         gpgme_key_release(key);
 539                                 }
 540                         } while (!err);
 541                 }
 542                 if (err) {
 543                         g_warning("setup_signers start: %s", gpgme_strerror(err));
 544                         privacy_set_error(_("Secret key not found (%s)"), gpgme_strerror(err));
 545                         goto bail;
 546                 }
 547
 548                 do {
 549                         err = gpgme_op_keylist_next(ctx, &key2);
 550                         if (!err && key2 && key2->protocol == gpgme_get_protocol(ctx) &&
 551                             !key2->expired && !key2->revoked && !key2->disabled)
 552                                 break;
 553                         if (!err && key2 && key2->protocol != gpgme_get_protocol(ctx)) {
 554                                 debug_print("skipping a key (wrong protocol %d)\n", key2->protocol);
 555                                 gpgme_key_release(key2);
 556                         }
 557                         if (!err && key2 && (key2->expired || key2->revoked || key2->disabled)) {
 558                                         debug_print("skipping a key");
 559                                         if (key2->expired)
 560                                                 debug_print(" expired");
 561                                         if (key2->revoked)
 562                                                 debug_print(" revoked");
 563                                         if (key2->disabled)
 564                                                 debug_print(" disabled");
 565                                         debug_print("\n");
 566                                 gpgme_key_release(key2);
 567                         }
 568                 } while (!err);
 569                 if (!err) {
 570                         gpgme_key_release(key2);
 571                         g_warning("ambiguous specification of secret key '%s'\n",
 572                                 keyid);
 573                         privacy_set_error(_("Secret key specification is ambiguous"));
 574                         goto bail;
 575                 }
 576
 577                 gpgme_op_keylist_end(ctx);
 578                 err = gpgme_signers_add(ctx, key);
 579                 debug_print("got key (proto %d (pgp %d, smime %d).\n", key->protocol,
 580                                 GPGME_PROTOCOL_OpenPGP, GPGME_PROTOCOL_CMS);
 581                 gpgme_key_release(key);
 582
 583                 if (err) {
 584                         g_warning("error adding secret key: %s\n", gpgme_strerror(err));
 585                         privacy_set_error(_("Error setting secret key: %s"), gpgme_strerror(err));
 586                         goto bail;
 587                 }
 588         }
 589
 590         prefs_gpg_account_free_config(config);
 591
 592         return TRUE;
 593 bail:
 594         prefs_gpg_account_free_config(config);
 595         return FALSE;
 596 }
 597
 598 void sgpgme_init()
 599 {
 600         gpgme_engine_info_t engineInfo;
 601         if (gpgme_check_version("1.0.0")) {
 602 #ifdef LC_CTYPE
 603                 gpgme_set_locale(NULL, LC_CTYPE, setlocale(LC_CTYPE, NULL));
 604 #endif
 605 #ifdef LC_MESSAGES
 606                 gpgme_set_locale(NULL, LC_MESSAGES, setlocale(LC_MESSAGES, NULL));
 607 #endif
 608                 if (!gpgme_get_engine_info(&engineInfo)) {
 609                         while (engineInfo) {
 610 #ifndef G_OS_WIN32
 611                                 debug_print("GpgME Protocol: %s\n"
 612                                             "Version: %s (req %s)\n"
 613                                             "Executable: %s\n",
 614                                         gpgme_get_protocol_name(engineInfo->protocol) ? gpgme_get_protocol_name(engineInfo->protocol):"???",
 615                                         engineInfo->version ? engineInfo->version:"???",
 616                                         engineInfo->req_version ? engineInfo->req_version:"???",
 617                                         engineInfo->file_name ? engineInfo->file_name:"???");
 618 #endif
 619                                 if (engineInfo->protocol == GPGME_PROTOCOL_OpenPGP
 620                                 &&  gpgme_engine_check_version(engineInfo->protocol) !=
 621                                         GPG_ERR_NO_ERROR) {
 622                                         if (engineInfo->file_name && !engineInfo->version) {
 623                                                 alertpanel_error(_("Gpgme protocol '%s' is unusable: "
 624                                                                    "Engine '%s' isn't installed properly."),
 625                                                                    gpgme_get_protocol_name(engineInfo->protocol),
 626                                                                    engineInfo->file_name);
 627                                         } else if (engineInfo->file_name && engineInfo->version
 628                                           && engineInfo->req_version) {
 629                                                 alertpanel_error(_("Gpgme protocol '%s' is unusable: "
 630                                                                    "Engine '%s' version %s is installed, "
 631                                                                    "but version %s is required.\n"),
 632                                                                    gpgme_get_protocol_name(engineInfo->protocol),
 633                                                                    engineInfo->file_name,
 634                                                                    engineInfo->version,
 635                                                                    engineInfo->req_version);
 636                                         } else {
 637                                                 alertpanel_error(_("Gpgme protocol '%s' is unusable "
 638                                                                    "(unknown problem)"),
 639                                                                    gpgme_get_protocol_name(engineInfo->protocol));
 640                                         }
 641                                 }
 642                                 engineInfo = engineInfo->next;
 643                         }
 644                 }
 645         } else {
 646                 sgpgme_disable_all();
 647
 648                 if (prefs_gpg_get_config()->gpg_warning) {
 649                         AlertValue val;
 650
 651                         val = alertpanel_full
 652                                 (_("Warning"),
 653                                  _("GnuPG is not installed properly, or needs "
 654                                  "to be upgraded.\n"
 655                                  "OpenPGP support disabled."),
 656                                  GTK_STOCK_CLOSE, NULL, NULL, TRUE, NULL,
 657                                  ALERT_WARNING, G_ALERTDEFAULT);
 658                         if (val & G_ALERTDISABLE)
 659                                 prefs_gpg_get_config()->gpg_warning = FALSE;
 660                 }
 661         }
 662 }
 663
 664 void sgpgme_done()
 665 {
 666         gpgmegtk_free_passphrase();
 667 }
 668
 669 void sgpgme_create_secret_key(PrefsAccount *account, gboolean ask_create)
 670 {
 671         AlertValue val = G_ALERTDEFAULT;
 672         gchar *key_parms = NULL;
 673         gchar *name = NULL;
 674         gchar *email = NULL;
 675         gchar *passphrase = NULL, *passphrase_second = NULL;
 676         gint prev_bad = 0;
 677         gchar *tmp = NULL;
 678         gpgme_error_t err = 0;
 679         gpgme_ctx_t ctx;
 680         GtkWidget *window = NULL;
 681         gpgme_genkey_result_t key;
 682
 683         if (account == NULL)
 684                 account = account_get_default();
 685
 686         if (account->address == NULL) {
 687                 alertpanel_error(_("You have to save the account's information with \"OK\" "
 688                                    "before being able to generate a key pair.\n"));
 689                 return;
 690         }
 691         if (ask_create) {
 692                 val = alertpanel(_("No PGP key found"),
 693                                 _("Claws Mail did not find a secret PGP key, "
 694                                   "which means that you won't be able to sign "
 695                                   "emails or receive encrypted emails.\n"
 696                                   "Do you want to create a new key pair now?"),
 697                                   GTK_STOCK_NO, "+" GTK_STOCK_YES, NULL);
 698                 if (val == G_ALERTDEFAULT) {
 699                         prefs_gpg_get_config()->gpg_ask_create_key = FALSE;
 700                         prefs_gpg_save_config();
 701                         return;
 702                 }
 703         }
 704
 705         if (account->name) {
 706                 name = g_strdup(account->name);
 707         } else {
 708                 name = g_strdup(account->address);
 709         }
 710         email = g_strdup(account->address);
 711         tmp = g_strdup_printf("%s <%s>", account->name?account->name:account->address, account->address);
 712 again:
 713         passphrase = passphrase_mbox(tmp, NULL, prev_bad, 1);
 714         if (passphrase == NULL) {
 715                 g_free(tmp);
 716                 g_free(email);
 717                 g_free(name);
 718                 return;
 719         }
 720         passphrase_second = passphrase_mbox(tmp, NULL, 0, 2);
 721         if (passphrase_second == NULL) {
 722                 g_free(tmp);
 723                 g_free(email);
 724                 g_free(passphrase);
 725                 g_free(name);
 726                 return;
 727         }
 728         if (strcmp(passphrase, passphrase_second)) {
 729                 g_free(passphrase);
 730                 g_free(passphrase_second);
 731                 prev_bad = 1;
 732                 goto again;
 733         }
 734
 735         key_parms = g_strdup_printf("<GnupgKeyParms format=\"internal\">\n"
 736                                         "Key-Type: DSA\n"
 737                                         "Key-Length: 1024\n"
 738                                         "Subkey-Type: ELG-E\n"
 739                                         "Subkey-Length: 2048\n"
 740                                         "Name-Real: %s\n"
 741                                         "Name-Email: %s\n"
 742                                         "Expire-Date: 0\n"
 743                                         "%s%s%s"
 744                                         "</GnupgKeyParms>\n",
 745                                         name, email,
 746                                         strlen(passphrase)?"Passphrase: ":"",
 747                                         passphrase,
 748                                         strlen(passphrase)?"\n":"");
 749 #ifndef G_PLATFORM_WIN32
 750         if (mlock(passphrase, strlen(passphrase)) == -1)
 751                 debug_print("couldn't lock passphrase\n");
 752         if (mlock(passphrase_second, strlen(passphrase_second)) == -1)
 753                 debug_print("couldn't lock passphrase2\n");
 754 #endif
 755         g_free(tmp);
 756         g_free(email);
 757         g_free(name);
 758         g_free(passphrase_second);
 759         g_free(passphrase);
 760
 761         err = gpgme_new (&ctx);
 762         if (err) {
 763                 alertpanel_error(_("Couldn't generate a new key pair: %s"),
 764                                  gpgme_strerror(err));
 765                 g_free(key_parms);
 766                 return;
 767         }
 768
 769
 770         window = label_window_create(_("Generating your new key pair... Please move the mouse "
 771                               "around to help generate entropy..."));
 772
 773         err = gpgme_op_genkey(ctx, key_parms, NULL, NULL);
 774         g_free(key_parms);
 775
 776         label_window_destroy(window);
 777
 778         if (err) {
 779                 alertpanel_error(_("Couldn't generate a new key pair: %s"), gpgme_strerror(err));
 780                 gpgme_release(ctx);
 781                 return;
 782         }
 783         key = gpgme_op_genkey_result(ctx);
 784         if (key == NULL) {
 785                 alertpanel_error(_("Couldn't generate a new key pair: unknown error"));
 786                 gpgme_release(ctx);
 787                 return;
 788         } else {
 789                 gchar *buf = g_strdup_printf(_("Your new key pair has been generated. "
 790                                     "Its fingerprint is:\n%s\n\nDo you want to export it "
 791                                     "to a keyserver?"),
 792                                     key->fpr ? key->fpr:"null");
 793                 AlertValue val = alertpanel(_("Key generated"), buf,
 794                                   GTK_STOCK_NO, "+" GTK_STOCK_YES, NULL);
 795                 g_free(buf);
 796                 if (val == G_ALERTALTERNATE) {
 797 #ifndef G_OS_WIN32
 798                         gchar *cmd = g_strdup_printf("gpg --no-tty --send-keys %s", key->fpr);
 799                         int res = 0;
 800                         pid_t pid = 0;
 801                         pid = fork();
 802                         if (pid == -1) {
 803                                 res = -1;
 804                         } else if (pid == 0) {
 805                                 /* son */
 806                                 res = system(cmd);
 807                                 res = WEXITSTATUS(res);
 808                                 _exit(res);
 809                         } else {
 810                                 int status = 0;
 811                                 time_t start_wait = time(NULL);
 812                                 res = -1;
 813                                 do {
 814                                         if (waitpid(pid, &status, WNOHANG) == 0 || !WIFEXITED(status)) {
 815                                                 usleep(200000);
 816                                         } else {
 817                                                 res = WEXITSTATUS(status);
 818                                                 break;
 819                                         }
 820                                         if (time(NULL) - start_wait > 5) {
 821                                                 debug_print("SIGTERM'ing gpg\n");
 822                                                 kill(pid, SIGTERM);
 823                                         }
 824                                         if (time(NULL) - start_wait > 6) {
 825                                                 debug_print("SIGKILL'ing gpg\n");
 826                                                 kill(pid, SIGKILL);
 827                                                 break;
 828                                         }
 829                                 } while(1);
 830                         }
 831                         if (res == 0) {
 832                                 alertpanel_notice(_("Key exported."));
 833                         } else {
 834                                 alertpanel_error(_("Couldn't export key."));
 835                         }
 836                         g_free(cmd);
 837 #else
 838                         alertpanel_error(_("Key export isn't implemented in Windows."));
 839 #endif
 840                 }
 841         }
 842         prefs_gpg_get_config()->gpg_ask_create_key = FALSE;
 843         prefs_gpg_save_config();
 844         gpgme_release(ctx);
 845 }
 846
 847 gboolean sgpgme_has_secret_key(void)
 848 {
 849         gpgme_error_t err = 0;
 850         gpgme_ctx_t ctx;
 851         gpgme_key_t key;
 852
 853         err = gpgme_new (&ctx);
 854         if (err) {
 855                 debug_print("err : %s\n", gpgme_strerror(err));
 856                 return TRUE;
 857         }
 858 check_again:
 859         err = gpgme_op_keylist_start(ctx, NULL, TRUE);
 860         if (!err)
 861                 err = gpgme_op_keylist_next(ctx, &key);
 862         gpgme_op_keylist_end(ctx);
 863         gpgme_release(ctx);
 864         if (gpg_err_code(err) == GPG_ERR_EOF) {
 865                 if (gpgme_get_protocol(ctx) != GPGME_PROTOCOL_CMS) {
 866                         gpgme_set_protocol(ctx, GPGME_PROTOCOL_CMS);
 867                         goto check_again;
 868                 }
 869                 return FALSE;
 870         } else
 871                 return TRUE;
 872 }
 873
 874 void sgpgme_check_create_key(void)
 875 {
 876         if (prefs_gpg_get_config()->gpg_ask_create_key &&
 877             !sgpgme_has_secret_key()) {
 878                 sgpgme_create_secret_key(NULL, TRUE);
 879         } else {
 880                 prefs_gpg_get_config()->gpg_ask_create_key = FALSE;
 881                 prefs_gpg_save_config();
 882         }
 883 }
 884
 885 void *sgpgme_data_release_and_get_mem(gpgme_data_t data, size_t *len)
 886 {
 887         char buf[BUFSIZ];
 888         void *result = NULL;
 889         ssize_t r = 0;
 890         size_t w = 0;
 891
 892         if (data == NULL)
 893                 return NULL;
 894         if (len == NULL)
 895                 return NULL;
 896
 897         /* I know it's deprecated, but we don't compile with _LARGEFILE */
 898         cm_gpgme_data_rewind(data);
 899         while ((r = gpgme_data_read(data, buf, BUFSIZ)) > 0) {
 900                 result = realloc(result, r + w);
 901                 memcpy(result+w, buf, r);
 902                 w += r;
 903         }
 904
 905         *len = w;
 906
 907         gpgme_data_release(data);
 908         if (r < 0) {
 909                 free(result);
 910                 *len = 0;
 911                 return NULL;
 912         }
 913         return result;
 914 }
 915
 916 gpgme_error_t cm_gpgme_data_rewind(gpgme_data_t dh)
 917 {
 918 #if defined(_FILE_OFFSET_BITS) && _FILE_OFFSET_BITS == 64
 919         if (gpgme_data_seek(dh, (off_t)0, SEEK_SET) == -1)
 920                 return gpg_error_from_errno(errno);
 921         else
 922                 return 0;
 923 #else
 924         return gpgme_data_rewind(dh);
 925 #endif
 926 }
 927
 928 #endif /* USE_GPGME */