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 = status->signatures;
 258
 259         siginfo = g_string_sized_new(64);
 260         while (sig) {
 261                 gpgme_user_id_t user = NULL;
 262                 gpgme_key_t key;
 263                 gpgme_error_t err;
 264                 const gchar *keytype, *keyid, *uid;
 265
 266                 err = gpgme_get_key(ctx, sig->fpr, &key, 0);
 267
 268                 if (err != GPG_ERR_NO_ERROR) {
 269                         key = NULL;
 270                         g_string_append_printf(siginfo,
 271                                 _("Error checking signature: %s\n"),
 272                                 gpgme_strerror(err));
 273                         goto bail;
 274                 }
 275                 if (key) {
 276                         user = key->uids;
 277                         keytype = gpgme_pubkey_algo_name(
 278                                         key->subkeys->pubkey_algo);
 279                         keyid = key->subkeys->keyid;
 280                         uid = user->uid;
 281                 } else {
 282                         keytype = "?";
 283                         keyid = "?";
 284                         uid = "?";
 285                 }
 286                 g_string_append_printf(siginfo,
 287                         _("Signature made using %s key ID %s\n"),
 288                         keytype, keyid);
 289
 290                 switch (gpg_err_code(sig->status)) {
 291                 case GPG_ERR_NO_ERROR:
 292                 case GPG_ERR_KEY_EXPIRED:
 293                         g_string_append_printf(siginfo,
 294                                 _("Good signature from uid \"%s\" (Validity: %s)\n"),
 295                                 uid, get_validity_str(user->validity));
 296                         break;
 297                 case GPG_ERR_SIG_EXPIRED:
 298                         g_string_append_printf(siginfo,
 299                                 _("Expired signature from uid \"%s\" (Validity: %s)\n"),
 300                                 uid, get_validity_str(user->validity));
 301                         break;
 302                 case GPG_ERR_BAD_SIGNATURE:
 303                         g_string_append_printf(siginfo,
 304                                 _("BAD signature from \"%s\"\n"),
 305                                 uid);
 306                         break;
 307                 default:
 308                         break;
 309                 }
 310                 if (sig->status != GPG_ERR_BAD_SIGNATURE) {
 311                         gint j = 1;
 312                         user = user ? user->next : NULL;
 313                         while (user != NULL) {
 314                                 g_string_append_printf(siginfo,
 315                                         _("                    uid \"%s\" (Validity: %s)\n"),
 316                                         user->uid,
 317                                         get_validity_str(user->validity));
 318                                 j++;
 319                                 user = user->next;
 320                         }
 321                         g_string_append_printf(siginfo,
 322                                 _("Primary key fingerprint: %s\n"),
 323                                 sig ? sig->fpr: "?");
 324 #ifdef HAVE_GPGME_PKA_TRUST
 325                         if (sig->pka_trust == 1 && sig->pka_address) {
 326                                 g_string_append_printf(siginfo,
 327                                    _("WARNING: Signer's address \"%s\" "
 328                                       "does not match DNS entry\n"),
 329                                    sig->pka_address);
 330                         }
 331                         else if (sig->pka_trust == 2 && sig->pka_address) {
 332                                 g_string_append_printf(siginfo,
 333                                    _("Verified signer's address is \"%s\"\n"),
 334                                    sig->pka_address);
 335                                 /* FIXME: Compare the address to the
 336                                  * From: address.  */
 337                         }
 338 #endif /*HAVE_GPGME_PKA_TRUST*/
 339                 }
 340
 341                 g_string_append(siginfo, "\n");
 342                 i++;
 343                 sig = sig->next;
 344         }
 345 bail:
 346         ret = siginfo->str;
 347         g_string_free(siginfo, FALSE);
 348         return ret;
 349 }
 350
 351 gpgme_data_t sgpgme_data_from_mimeinfo(MimeInfo *mimeinfo)
 352 {
 353         gpgme_data_t data = NULL;
 354         gpgme_error_t err;
 355         FILE *fp = g_fopen(mimeinfo->data.filename, "rb");
 356         gchar *tmp_file = NULL;
 357
 358         if (!fp)
 359                 return NULL;
 360
 361         tmp_file = get_tmp_file();
 362         copy_file_part(fp, mimeinfo->offset, mimeinfo->length, tmp_file);
 363         fclose(fp);
 364         fp = NULL;
 365         debug_print("tmp file %s\n", tmp_file);
 366
 367         err = gpgme_data_new_from_file(&data, tmp_file, 1);
 368         claws_unlink(tmp_file);
 369         g_free(tmp_file);
 370
 371         debug_print("data %p (%d %d)\n", (void *)&data, mimeinfo->offset, mimeinfo->length);
 372         if (err) {
 373                 debug_print ("gpgme_data_new_from_file failed: %s\n",
 374                              gpgme_strerror (err));
 375                 privacy_set_error(_("Couldn't get data from message, %s"), gpgme_strerror(err));
 376                 return NULL;
 377         }
 378         return data;
 379 }
 380
 381 gpgme_data_t sgpgme_decrypt_verify(gpgme_data_t cipher, gpgme_verify_result_t *status, gpgme_ctx_t ctx)
 382 {
 383         struct passphrase_cb_info_s info;
 384         gpgme_data_t plain;
 385         gpgme_error_t err;
 386
 387         memset (&info, 0, sizeof info);
 388
 389         if ((err = gpgme_data_new(&plain)) != GPG_ERR_NO_ERROR) {
 390                 gpgme_release(ctx);
 391                 privacy_set_error(_("Couldn't initialize data, %s"), gpgme_strerror(err));
 392                 return NULL;
 393         }
 394
 395         if (gpgme_get_protocol(ctx) == GPGME_PROTOCOL_OpenPGP) {
 396                 prefs_gpg_enable_agent(prefs_gpg_get_config()->use_gpg_agent);
 397                 if (!getenv("GPG_AGENT_INFO") || !prefs_gpg_get_config()->use_gpg_agent) {
 398                         info.c = ctx;
 399                         gpgme_set_passphrase_cb (ctx, gpgmegtk_passphrase_cb, &info);
 400                 }
 401         } else {
 402                 prefs_gpg_enable_agent(TRUE);
 403                 info.c = ctx;
 404                 gpgme_set_passphrase_cb (ctx, NULL, &info);
 405         }
 406
 407
 408         if (gpgme_get_protocol(ctx) == GPGME_PROTOCOL_OpenPGP) {
 409                 err = gpgme_op_decrypt_verify(ctx, cipher, plain);
 410                 if (err != GPG_ERR_NO_ERROR) {
 411                         debug_print("can't decrypt (%s)\n", gpgme_strerror(err));
 412                         privacy_set_error("%s", gpgme_strerror(err));
 413                         gpgmegtk_free_passphrase();
 414                         gpgme_data_release(plain);
 415                         return NULL;
 416                 }
 417
 418                 err = gpgme_data_rewind(plain);
 419                 if (err) {
 420                         debug_print("can't seek (%d %d %s)\n", err, errno, strerror(errno));
 421                 }
 422
 423                 debug_print("decrypted.\n");
 424                 *status = gpgme_op_verify_result (ctx);
 425         } else {
 426                 err = gpgme_op_decrypt(ctx, cipher, plain);
 427                 if (err != GPG_ERR_NO_ERROR) {
 428                         debug_print("can't decrypt (%s)\n", gpgme_strerror(err));
 429                         privacy_set_error("%s", gpgme_strerror(err));
 430                         gpgmegtk_free_passphrase();
 431                         gpgme_data_release(plain);
 432                         return NULL;
 433                 }
 434
 435                 err = gpgme_data_rewind(plain);
 436                 if (err) {
 437                         debug_print("can't seek (%d %d %s)\n", err, errno, strerror(errno));
 438                 }
 439
 440                 debug_print("decrypted.\n");
 441                 *status = gpgme_op_verify_result (ctx);
 442         }
 443         return plain;
 444 }
 445
 446 gchar *sgpgme_get_encrypt_data(GSList *recp_names, gpgme_protocol_t proto)
 447 {
 448         SelectionResult result = KEY_SELECTION_CANCEL;
 449         gpgme_key_t *keys = gpgmegtk_recipient_selection(recp_names, &result,
 450                                 proto);
 451         gchar *ret = NULL;
 452         int i = 0;
 453
 454         if (!keys) {
 455                 if (result == KEY_SELECTION_DONT)
 456                         return g_strdup("_DONT_ENCRYPT_");
 457                 else
 458                         return NULL;
 459         }
 460         while (keys[i]) {
 461                 gpgme_subkey_t skey = keys[i]->subkeys;
 462                 gchar *fpr = skey->fpr;
 463                 gchar *tmp = NULL;
 464                 debug_print("adding %s\n", fpr);
 465                 tmp = g_strconcat(ret?ret:"", fpr, " ", NULL);
 466                 g_free(ret);
 467                 ret = tmp;
 468                 i++;
 469         }
 470         return ret;
 471 }
 472
 473 gboolean sgpgme_setup_signers(gpgme_ctx_t ctx, PrefsAccount *account,
 474                               const gchar *from_addr)
 475 {
 476         GPGAccountConfig *config;
 477         const gchar *signer_addr = account->address;
 478
 479         gpgme_signers_clear(ctx);
 480
 481         if (from_addr)
 482                 signer_addr = from_addr;
 483         config = prefs_gpg_account_get_config(account);
 484
 485         switch(config->sign_key) {
 486         case SIGN_KEY_DEFAULT:
 487                 debug_print("using default gnupg key\n");
 488                 break;
 489         case SIGN_KEY_BY_FROM:
 490                 debug_print("using key for %s\n", signer_addr);
 491                 break;
 492         case SIGN_KEY_CUSTOM:
 493                 debug_print("using key for %s\n", config->sign_key_id);
 494                 break;
 495         }
 496
 497         if (config->sign_key != SIGN_KEY_DEFAULT) {
 498                 const gchar *keyid;
 499                 gpgme_key_t key, key2;
 500                 gpgme_error_t err;
 501
 502                 if (config->sign_key == SIGN_KEY_BY_FROM)
 503                         keyid = signer_addr;
 504                 else if (config->sign_key == SIGN_KEY_CUSTOM)
 505                         keyid = config->sign_key_id;
 506                 else
 507                         goto bail;
 508
 509                 err = gpgme_op_keylist_start(ctx, keyid, 1);
 510                 if (!err) {
 511                         do {
 512                                 err = gpgme_op_keylist_next(ctx, &key);
 513                                 if (!err && key && key->protocol == gpgme_get_protocol(ctx) &&
 514                                     !key->expired && !key->revoked)
 515                                         break;
 516                                 if (!err && key && key->protocol != gpgme_get_protocol(ctx)) {
 517                                         debug_print("skipping a key (wrong protocol %d)\n", key->protocol);
 518                                         gpgme_key_release(key);
 519                                 }
 520                                 if (!err && key && (key->expired || key->revoked)) {
 521                                         debug_print("skipping a key (%s)\n", key->expired?"expired":"revoked");
 522                                         gpgme_key_release(key);
 523                                 }
 524                         } while (!err);
 525                 }
 526                 if (err) {
 527                         g_warning("setup_signers start: %s", gpgme_strerror(err));
 528                         privacy_set_error(_("Secret key not found (%s)"), gpgme_strerror(err));
 529                         goto bail;
 530                 }
 531
 532                 do {
 533                         err = gpgme_op_keylist_next(ctx, &key2);
 534                         if (!err && key2 && key2->protocol == gpgme_get_protocol(ctx) &&
 535                             !key2->expired && !key2->revoked)
 536                                 break;
 537                         if (!err && key && key2->protocol != gpgme_get_protocol(ctx)) {
 538                                 debug_print("skipping a key (wrong protocol %d)\n", key2->protocol);
 539                                 gpgme_key_release(key2);
 540                         }
 541                         if (!err && key && (key2->expired || key2->revoked)) {
 542                                 debug_print("skipping a key (%s)\n", key2->expired?"expired":"revoked");
 543                                 gpgme_key_release(key2);
 544                         }
 545                 } while (!err);
 546                 if (!err) {
 547                         gpgme_key_release(key2);
 548                         g_warning("ambiguous specification of secret key '%s'\n",
 549                                 keyid);
 550                         privacy_set_error(_("Secret key specification is ambiguous"));
 551                         goto bail;
 552                 }
 553
 554                 gpgme_op_keylist_end(ctx);
 555                 err = gpgme_signers_add(ctx, key);
 556                 debug_print("got key (proto %d (pgp %d, smime %d).\n", key->protocol,
 557                                 GPGME_PROTOCOL_OpenPGP, GPGME_PROTOCOL_CMS);
 558                 gpgme_key_release(key);
 559
 560                 if (err) {
 561                         g_warning("error adding secret key: %s\n", gpgme_strerror(err));
 562                         privacy_set_error(_("Error setting secret key: %s"), gpgme_strerror(err));
 563                         goto bail;
 564                 }
 565         }
 566
 567         prefs_gpg_account_free_config(config);
 568
 569         return TRUE;
 570 bail:
 571         prefs_gpg_account_free_config(config);
 572         return FALSE;
 573 }
 574
 575 void sgpgme_init()
 576 {
 577         gpgme_engine_info_t engineInfo;
 578         if (gpgme_check_version("1.0.0")) {
 579 #ifdef LC_CTYPE
 580                 gpgme_set_locale(NULL, LC_CTYPE, setlocale(LC_CTYPE, NULL));
 581 #endif
 582 #ifdef LC_MESSAGES
 583                 gpgme_set_locale(NULL, LC_MESSAGES, setlocale(LC_MESSAGES, NULL));
 584 #endif
 585                 if (!gpgme_get_engine_info(&engineInfo)) {
 586                         while (engineInfo) {
 587 #ifndef G_OS_WIN32
 588                                 debug_print("GpgME Protocol: %s\n"
 589                                             "Version: %s (req %s)\n"
 590                                             "Executable: %s\n",
 591                                         gpgme_get_protocol_name(engineInfo->protocol) ? gpgme_get_protocol_name(engineInfo->protocol):"???",
 592                                         engineInfo->version ? engineInfo->version:"???",
 593                                         engineInfo->req_version ? engineInfo->req_version:"???",
 594                                         engineInfo->file_name ? engineInfo->file_name:"???");
 595 #endif
 596                                 if (engineInfo->protocol == GPGME_PROTOCOL_OpenPGP
 597                                 &&  gpgme_engine_check_version(engineInfo->protocol) !=
 598                                         GPG_ERR_NO_ERROR) {
 599                                         if (engineInfo->file_name && !engineInfo->version) {
 600                                                 alertpanel_error(_("Gpgme protocol '%s' is unusable: "
 601                                                                    "Engine '%s' isn't installed properly."),
 602                                                                    gpgme_get_protocol_name(engineInfo->protocol),
 603                                                                    engineInfo->file_name);
 604                                         } else if (engineInfo->file_name && engineInfo->version
 605                                           && engineInfo->req_version) {
 606                                                 alertpanel_error(_("Gpgme protocol '%s' is unusable: "
 607                                                                    "Engine '%s' version %s is installed, "
 608                                                                    "but version %s is required.\n"),
 609                                                                    gpgme_get_protocol_name(engineInfo->protocol),
 610                                                                    engineInfo->file_name,
 611                                                                    engineInfo->version,
 612                                                                    engineInfo->req_version);
 613                                         } else {
 614                                                 alertpanel_error(_("Gpgme protocol '%s' is unusable "
 615                                                                    "(unknown problem)"),
 616                                                                    gpgme_get_protocol_name(engineInfo->protocol));
 617                                         }
 618                                 }
 619                                 engineInfo = engineInfo->next;
 620                         }
 621                 }
 622         } else {
 623                 sgpgme_disable_all();
 624
 625                 if (prefs_gpg_get_config()->gpg_warning) {
 626                         AlertValue val;
 627
 628                         val = alertpanel_full
 629                                 (_("Warning"),
 630                                  _("GnuPG is not installed properly, or needs "
 631                                  "to be upgraded.\n"
 632                                  "OpenPGP support disabled."),
 633                                  GTK_STOCK_CLOSE, NULL, NULL, TRUE, NULL,
 634                                  ALERT_WARNING, G_ALERTDEFAULT);
 635                         if (val & G_ALERTDISABLE)
 636                                 prefs_gpg_get_config()->gpg_warning = FALSE;
 637                 }
 638         }
 639 }
 640
 641 void sgpgme_done()
 642 {
 643         gpgmegtk_free_passphrase();
 644 }
 645
 646 void sgpgme_create_secret_key(PrefsAccount *account, gboolean ask_create)
 647 {
 648         AlertValue val = G_ALERTDEFAULT;
 649         gchar *key_parms = NULL;
 650         gchar *name = NULL;
 651         gchar *email = NULL;
 652         gchar *passphrase = NULL, *passphrase_second = NULL;
 653         gint prev_bad = 0;
 654         gchar *tmp = NULL;
 655         gpgme_error_t err = 0;
 656         gpgme_ctx_t ctx;
 657         GtkWidget *window = NULL;
 658         gpgme_genkey_result_t key;
 659
 660         if (account == NULL)
 661                 account = account_get_default();
 662
 663         if (account->address == NULL) {
 664                 alertpanel_error(_("You have to save the account's information with \"OK\" "
 665                                    "before being able to generate a key pair.\n"));
 666                 return;
 667         }
 668         if (ask_create) {
 669                 val = alertpanel(_("No PGP key found"),
 670                                 _("Claws Mail did not find a secret PGP key, "
 671                                   "which means that you won't be able to sign "
 672                                   "emails or receive encrypted emails.\n"
 673                                   "Do you want to create a new key pair now?"),
 674                                   GTK_STOCK_NO, "+" GTK_STOCK_YES, NULL);
 675                 if (val == G_ALERTDEFAULT) {
 676                         prefs_gpg_get_config()->gpg_ask_create_key = FALSE;
 677                         prefs_gpg_save_config();
 678                         return;
 679                 }
 680         }
 681
 682         if (account->name) {
 683                 name = g_strdup(account->name);
 684         } else {
 685                 name = g_strdup(account->address);
 686         }
 687         email = g_strdup(account->address);
 688         tmp = g_strdup_printf("%s <%s>", account->name?account->name:account->address, account->address);
 689 again:
 690         passphrase = passphrase_mbox(tmp, NULL, prev_bad, 1);
 691         if (passphrase == NULL) {
 692                 g_free(tmp);
 693                 g_free(email);
 694                 g_free(name);
 695                 return;
 696         }
 697         passphrase_second = passphrase_mbox(tmp, NULL, 0, 2);
 698         if (passphrase_second == NULL) {
 699                 g_free(tmp);
 700                 g_free(email);
 701                 g_free(passphrase);
 702                 g_free(name);
 703                 return;
 704         }
 705         if (strcmp(passphrase, passphrase_second)) {
 706                 g_free(passphrase);
 707                 g_free(passphrase_second);
 708                 prev_bad = 1;
 709                 goto again;
 710         }
 711
 712         key_parms = g_strdup_printf("<GnupgKeyParms format=\"internal\">\n"
 713                                         "Key-Type: DSA\n"
 714                                         "Key-Length: 1024\n"
 715                                         "Subkey-Type: ELG-E\n"
 716                                         "Subkey-Length: 2048\n"
 717                                         "Name-Real: %s\n"
 718                                         "Name-Email: %s\n"
 719                                         "Expire-Date: 0\n"
 720                                         "%s%s%s"
 721                                         "</GnupgKeyParms>\n",
 722                                         name, email,
 723                                         strlen(passphrase)?"Passphrase: ":"",
 724                                         passphrase,
 725                                         strlen(passphrase)?"\n":"");
 726 #ifndef G_PLATFORM_WIN32
 727         if (mlock(passphrase, strlen(passphrase)) == -1)
 728                 debug_print("couldn't lock passphrase\n");
 729         if (mlock(passphrase_second, strlen(passphrase_second)) == -1)
 730                 debug_print("couldn't lock passphrase2\n");
 731 #endif
 732         g_free(tmp);
 733         g_free(email);
 734         g_free(name);
 735         g_free(passphrase_second);
 736         g_free(passphrase);
 737
 738         err = gpgme_new (&ctx);
 739         if (err) {
 740                 alertpanel_error(_("Couldn't generate a new key pair: %s"),
 741                                  gpgme_strerror(err));
 742                 g_free(key_parms);
 743                 return;
 744         }
 745
 746
 747         window = label_window_create(_("Generating your new key pair... Please move the mouse "
 748                               "around to help generate entropy..."));
 749
 750         err = gpgme_op_genkey(ctx, key_parms, NULL, NULL);
 751         g_free(key_parms);
 752
 753         label_window_destroy(window);
 754
 755         if (err) {
 756                 alertpanel_error(_("Couldn't generate a new key pair: %s"), gpgme_strerror(err));
 757                 gpgme_release(ctx);
 758                 return;
 759         }
 760         key = gpgme_op_genkey_result(ctx);
 761         if (key == NULL) {
 762                 alertpanel_error(_("Couldn't generate a new key pair: unknown error"));
 763                 gpgme_release(ctx);
 764                 return;
 765         } else {
 766                 gchar *buf = g_strdup_printf(_("Your new key pair has been generated. "
 767                                     "Its fingerprint is:\n%s\n\nDo you want to export it "
 768                                     "to a keyserver?"),
 769                                     key->fpr ? key->fpr:"null");
 770                 AlertValue val = alertpanel(_("Key generated"), buf,
 771                                   GTK_STOCK_NO, "+" GTK_STOCK_YES, NULL);
 772                 g_free(buf);
 773                 if (val == G_ALERTALTERNATE) {
 774 #ifndef G_OS_WIN32
 775                         gchar *cmd = g_strdup_printf("gpg --no-tty --send-keys %s", key->fpr);
 776                         int res = 0;
 777                         pid_t pid = 0;
 778                         pid = fork();
 779                         if (pid == -1) {
 780                                 res = -1;
 781                         } else if (pid == 0) {
 782                                 /* son */
 783                                 res = system(cmd);
 784                                 res = WEXITSTATUS(res);
 785                                 _exit(res);
 786                         } else {
 787                                 int status = 0;
 788                                 time_t start_wait = time(NULL);
 789                                 res = -1;
 790                                 do {
 791                                         if (waitpid(pid, &status, WNOHANG) == 0 || !WIFEXITED(status)) {
 792                                                 usleep(200000);
 793                                         } else {
 794                                                 res = WEXITSTATUS(status);
 795                                                 break;
 796                                         }
 797                                         if (time(NULL) - start_wait > 5) {
 798                                                 debug_print("SIGTERM'ing gpg\n");
 799                                                 kill(pid, SIGTERM);
 800                                         }
 801                                         if (time(NULL) - start_wait > 6) {
 802                                                 debug_print("SIGKILL'ing gpg\n");
 803                                                 kill(pid, SIGKILL);
 804                                                 break;
 805                                         }
 806                                 } while(1);
 807                         }
 808                         if (res == 0) {
 809                                 alertpanel_notice(_("Key exported."));
 810                         } else {
 811                                 alertpanel_error(_("Couldn't export key."));
 812                         }
 813                         g_free(cmd);
 814 #else
 815                         alertpanel_error(_("Key export isn't implemented in Windows."));
 816 #endif
 817                 }
 818         }
 819         prefs_gpg_get_config()->gpg_ask_create_key = FALSE;
 820         prefs_gpg_save_config();
 821         gpgme_release(ctx);
 822 }
 823
 824 gboolean sgpgme_has_secret_key(void)
 825 {
 826         gpgme_error_t err = 0;
 827         gpgme_ctx_t ctx;
 828         gpgme_key_t key;
 829
 830         err = gpgme_new (&ctx);
 831         if (err) {
 832                 debug_print("err : %s\n", gpgme_strerror(err));
 833                 return TRUE;
 834         }
 835         err = gpgme_op_keylist_start(ctx, NULL, TRUE);
 836         if (!err)
 837                 err = gpgme_op_keylist_next(ctx, &key);
 838         gpgme_op_keylist_end(ctx);
 839         gpgme_release(ctx);
 840         if (gpg_err_code(err) == GPG_ERR_EOF)
 841                 return FALSE;
 842         else
 843                 return TRUE;
 844 }
 845
 846 void sgpgme_check_create_key(void)
 847 {
 848         if (prefs_gpg_get_config()->gpg_ask_create_key &&
 849             !sgpgme_has_secret_key()) {
 850                 sgpgme_create_secret_key(NULL, TRUE);
 851         } else {
 852                 prefs_gpg_get_config()->gpg_ask_create_key = FALSE;
 853                 prefs_gpg_save_config();
 854         }
 855 }
 856
 857 void *sgpgme_data_release_and_get_mem(gpgme_data_t data, size_t *len)
 858 {
 859         char buf[BUFSIZ];
 860         void *result = NULL;
 861         ssize_t r = 0;
 862         size_t w = 0;
 863
 864         if (data == NULL)
 865                 return NULL;
 866         if (len == NULL)
 867                 return NULL;
 868
 869         /* I know it's deprecated, but we don't compile with _LARGEFILE */
 870         gpgme_data_rewind(data);
 871         while ((r = gpgme_data_read(data, buf, BUFSIZ)) > 0) {
 872                 result = realloc(result, r + w);
 873                 memcpy(result+w, buf, r);
 874                 w += r;
 875         }
 876
 877         *len = w;
 878
 879         gpgme_data_release(data);
 880         if (r < 0) {
 881                 free(result);
 882                 *len = 0;
 883                 return NULL;
 884         }
 885         return result;
 886 }
 887 #endif /* USE_GPGME */