src/plugins/pgpcore/sgpgme.c

   1 /*
   2  * Claws Mail -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2007 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 (__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(gpgme_strerror(err));
  74                 return GINT_TO_POINTER(-GPG_ERR_SYSTEM_ERROR);
  75
  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         unsigned long validity = 0;
  89         gpgme_signature_t sig = NULL;
  90
  91         if (GPOINTER_TO_INT(status) == -GPG_ERR_SYSTEM_ERROR) {
  92                 debug_print("system error\n");
  93                 return SIGNATURE_CHECK_FAILED;
  94         }
  95
  96         if (status == NULL) {
  97                 debug_print("status == NULL\n");
  98                 return SIGNATURE_UNCHECKED;
  99         }
 100         sig = status->signatures;
 101
 102         if (sig == NULL) {
 103                 debug_print("sig == NULL\n");
 104                 return SIGNATURE_UNCHECKED;
 105         }
 106         validity = sig->validity;
 107
 108         debug_print("err code %d\n", gpg_err_code(sig->status));
 109         switch (gpg_err_code(sig->status)) {
 110         case GPG_ERR_NO_ERROR:
 111                 switch (gpg_err_code(sig->validity)) {
 112                 case GPGME_VALIDITY_NEVER:
 113                         return SIGNATURE_INVALID;
 114                 case GPGME_VALIDITY_UNKNOWN:
 115                 case GPGME_VALIDITY_UNDEFINED:
 116                 case GPGME_VALIDITY_MARGINAL:
 117                 case GPGME_VALIDITY_FULL:
 118                 case GPGME_VALIDITY_ULTIMATE:
 119                         return SIGNATURE_OK;
 120                 default:
 121                         return SIGNATURE_CHECK_FAILED;
 122                 }
 123         case GPG_ERR_SIG_EXPIRED:
 124         case GPG_ERR_KEY_EXPIRED:
 125                 return SIGNATURE_WARN;
 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 gchar *extract_name(const char *uid)
 157 {
 158         if (uid == NULL)
 159                 return NULL;
 160         if (!strncmp(uid, "CN=", 3)) {
 161                 gchar *result = g_strdup(uid+3);
 162                 if (strstr(result, ","))
 163                         *(strstr(result, ",")) = '\0';
 164                 return result;
 165         } else if (strstr(uid, ",CN=")) {
 166                 gchar *result = g_strdup(strstr(uid, ",CN=")+4);
 167                 if (strstr(result, ","))
 168                         *(strstr(result, ",")) = '\0';
 169                 return result;
 170         } else {
 171                 return g_strdup(uid);
 172         }
 173 }
 174 gchar *sgpgme_sigstat_info_short(gpgme_ctx_t ctx, gpgme_verify_result_t status)
 175 {
 176         gpgme_signature_t sig = NULL;
 177         gchar *uname = NULL;
 178         gpgme_key_t key;
 179         gchar *result = NULL;
 180         gpgme_error_t err = 0;
 181         static gboolean warned = FALSE;
 182
 183         if (GPOINTER_TO_INT(status) == -GPG_ERR_SYSTEM_ERROR) {
 184                 return g_strdup_printf(_("The signature can't be checked - %s"), privacy_get_error());
 185         }
 186
 187         if (status == NULL) {
 188                 return g_strdup(_("The signature has not been checked."));
 189         }
 190         sig = status->signatures;
 191         if (sig == NULL) {
 192                 return g_strdup(_("The signature has not been checked."));
 193         }
 194
 195         err = gpgme_get_key(ctx, sig->fpr, &key, 0);
 196         if (gpg_err_code(err) == GPG_ERR_NO_AGENT) {
 197                 if (!warned)
 198                         alertpanel_error(_("PGP Core: Can't get key - no gpg-agent running."));
 199                 else
 200                         g_warning(_("PGP Core: Can't get key - no gpg-agent running."));
 201                 warned = TRUE;
 202         }
 203         if (key)
 204                 uname = extract_name(key->uids->uid);
 205         else
 206                 uname = g_strdup("<?>");
 207         switch (gpg_err_code(sig->status)) {
 208         case GPG_ERR_NO_ERROR:
 209                 switch (gpg_err_code(sig->validity)) {
 210                 case GPGME_VALIDITY_MARGINAL:
 211                 case GPGME_VALIDITY_FULL:
 212                 case GPGME_VALIDITY_ULTIMATE:
 213                         result = g_strdup_printf(_("Good signature from %s."), uname);
 214                         break;
 215                 case GPGME_VALIDITY_UNKNOWN:
 216                 case GPGME_VALIDITY_UNDEFINED:
 217                 case GPGME_VALIDITY_NEVER:
 218                 default:
 219                         result = g_strdup_printf(_("Good signature (untrusted) from %s."), uname);
 220                         break;
 221                 }
 222                 break;
 223         case GPG_ERR_SIG_EXPIRED:
 224                 result = g_strdup_printf(_("Expired signature from %s."), uname);
 225                 break;
 226         case GPG_ERR_KEY_EXPIRED:
 227                 result = g_strdup_printf(_("Expired key from %s."), uname);
 228                 break;
 229         case GPG_ERR_BAD_SIGNATURE:
 230                 result = g_strdup_printf(_("Bad signature from %s."), uname);
 231                 break;
 232         case GPG_ERR_NO_PUBKEY: {
 233                 gchar *id = g_strdup(sig->fpr + strlen(sig->fpr)-8);
 234                 result = g_strdup_printf(_("Key 0x%s not available to verify this signature."), id);
 235                 g_free(id);
 236                 break;
 237                 }
 238         default:
 239                 result = g_strdup(_("The signature has not been checked."));
 240                 break;
 241         }
 242         if (result == NULL)
 243                 result = g_strdup(_("Error"));
 244         g_free(uname);
 245         return result;
 246 }
 247
 248 gchar *sgpgme_sigstat_info_full(gpgme_ctx_t ctx, gpgme_verify_result_t status)
 249 {
 250         gint i = 0;
 251         gchar *ret;
 252         GString *siginfo;
 253         gpgme_signature_t sig = status->signatures;
 254
 255         siginfo = g_string_sized_new(64);
 256         while (sig) {
 257                 gpgme_user_id_t user = NULL;
 258                 gpgme_key_t key;
 259
 260                 const gchar *keytype, *keyid, *uid;
 261
 262                 gpgme_get_key(ctx, sig->fpr, &key, 0);
 263
 264                 if (key) {
 265                         user = key->uids;
 266                         keytype = gpgme_pubkey_algo_name(
 267                                         key->subkeys->pubkey_algo);
 268                         keyid = key->subkeys->keyid;
 269                         uid = user->uid;
 270                 } else {
 271                         keytype = "?";
 272                         keyid = "?";
 273                         uid = "?";
 274                 }
 275                 g_string_append_printf(siginfo,
 276                         _("Signature made using %s key ID %s\n"),
 277                         keytype, keyid);
 278
 279                 switch (gpg_err_code(sig->status)) {
 280                 case GPG_ERR_NO_ERROR:
 281                 case GPG_ERR_KEY_EXPIRED:
 282                         g_string_append_printf(siginfo,
 283                                 _("Good signature from \"%s\" (Trust: %s)\n"),
 284                                 uid, get_validity_str(sig->validity));
 285                         break;
 286                 case GPG_ERR_SIG_EXPIRED:
 287                         g_string_append_printf(siginfo,
 288                                 _("Expired signature from \"%s\"\n"),
 289                                 uid);
 290                         break;
 291                 case GPG_ERR_BAD_SIGNATURE:
 292                         g_string_append_printf(siginfo,
 293                                 _("BAD signature from \"%s\"\n"),
 294                                 uid);
 295                         break;
 296                 default:
 297                         break;
 298                 }
 299                 if (sig->status != GPG_ERR_BAD_SIGNATURE) {
 300                         gint j = 1;
 301                         user = user ? user->next : NULL;
 302                         while (user != NULL) {
 303                                 g_string_append_printf(siginfo,
 304                                         _("                aka \"%s\"\n"),
 305                                         user->uid);
 306                                 j++;
 307                                 user = user->next;
 308                         }
 309                         g_string_append_printf(siginfo,
 310                                 _("Primary key fingerprint: %s\n"),
 311                                 sig ? sig->fpr: "?");
 312 #ifdef HAVE_GPGME_PKA_TRUST
 313                         if (sig->pka_trust == 1 && sig->pka_address) {
 314                                 g_string_append_printf(siginfo,
 315                                    _("WARNING: Signer's address \"%s\" "
 316                                       "does not match DNS entry\n"),
 317                                    sig->pka_address);
 318                         }
 319                         else if (sig->pka_trust == 2 && sig->pka_address) {
 320                                 g_string_append_printf(siginfo,
 321                                    _("Verified signer's address is \"%s\"\n"),
 322                                    sig->pka_address);
 323                                 /* FIXME: Compare the address to the
 324                                  * From: address.  */
 325                         }
 326 #endif /*HAVE_GPGME_PKA_TRUST*/
 327                 }
 328
 329                 g_string_append(siginfo, "\n");
 330                 i++;
 331                 sig = sig->next;
 332         }
 333
 334         ret = siginfo->str;
 335         g_string_free(siginfo, FALSE);
 336         return ret;
 337 }
 338
 339 gpgme_data_t sgpgme_data_from_mimeinfo(MimeInfo *mimeinfo)
 340 {
 341         gpgme_data_t data = NULL;
 342         gpgme_error_t err;
 343         FILE *fp = g_fopen(mimeinfo->data.filename, "rb");
 344         gchar *tmp_file = NULL;
 345
 346         if (!fp)
 347                 return NULL;
 348
 349         tmp_file = get_tmp_file();
 350         copy_file_part(fp, mimeinfo->offset, mimeinfo->length, tmp_file);
 351         fclose(fp);
 352         fp = NULL;
 353         debug_print("tmp file %s\n", tmp_file);
 354
 355         err = gpgme_data_new_from_file(&data, tmp_file, 1);
 356         g_unlink(tmp_file);
 357         g_free(tmp_file);
 358
 359         debug_print("data %p (%d %d)\n", (void *)&data, mimeinfo->offset, mimeinfo->length);
 360         if (err) {
 361                 debug_print ("gpgme_data_new_from_file failed: %s\n",
 362                              gpgme_strerror (err));
 363                 privacy_set_error(_("Couldn't get data from message, %s"), gpgme_strerror(err));
 364                 return NULL;
 365         }
 366         return data;
 367 }
 368
 369 gpgme_data_t sgpgme_decrypt_verify(gpgme_data_t cipher, gpgme_verify_result_t *status, gpgme_ctx_t ctx)
 370 {
 371         struct passphrase_cb_info_s info;
 372         gpgme_data_t plain;
 373         gpgme_error_t err;
 374
 375         memset (&info, 0, sizeof info);
 376
 377         if ((err = gpgme_data_new(&plain)) != GPG_ERR_NO_ERROR) {
 378                 gpgme_release(ctx);
 379                 privacy_set_error(_("Couldn't initialize data, %s"), gpgme_strerror(err));
 380                 return NULL;
 381         }
 382
 383         if (gpgme_get_protocol(ctx) == GPGME_PROTOCOL_OpenPGP) {
 384                 prefs_gpg_enable_agent(prefs_gpg_get_config()->use_gpg_agent);
 385                 if (!getenv("GPG_AGENT_INFO") || !prefs_gpg_get_config()->use_gpg_agent) {
 386                         info.c = ctx;
 387                         gpgme_set_passphrase_cb (ctx, gpgmegtk_passphrase_cb, &info);
 388                 }
 389         } else {
 390                 prefs_gpg_enable_agent(TRUE);
 391                 info.c = ctx;
 392                 gpgme_set_passphrase_cb (ctx, NULL, &info);
 393         }
 394
 395
 396         if (gpgme_get_protocol(ctx) == GPGME_PROTOCOL_OpenPGP) {
 397                 err = gpgme_op_decrypt_verify(ctx, cipher, plain);
 398                 if (err != GPG_ERR_NO_ERROR) {
 399                         debug_print("can't decrypt (%s)\n", gpgme_strerror(err));
 400                         privacy_set_error("%s", gpgme_strerror(err));
 401                         gpgmegtk_free_passphrase();
 402                         gpgme_data_release(plain);
 403                         return NULL;
 404                 }
 405
 406                 err = gpgme_data_rewind(plain);
 407                 if (err) {
 408                         debug_print("can't seek (%d %d %s)\n", err, errno, strerror(errno));
 409                 }
 410
 411                 debug_print("decrypted.\n");
 412                 *status = gpgme_op_verify_result (ctx);
 413         } else {
 414                 err = gpgme_op_decrypt(ctx, cipher, plain);
 415                 if (err != GPG_ERR_NO_ERROR) {
 416                         debug_print("can't decrypt (%s)\n", gpgme_strerror(err));
 417                         privacy_set_error("%s", gpgme_strerror(err));
 418                         gpgmegtk_free_passphrase();
 419                         gpgme_data_release(plain);
 420                         return NULL;
 421                 }
 422
 423                 err = gpgme_data_rewind(plain);
 424                 if (err) {
 425                         debug_print("can't seek (%d %d %s)\n", err, errno, strerror(errno));
 426                 }
 427
 428                 debug_print("decrypted.\n");
 429                 *status = gpgme_op_verify_result (ctx);
 430         }
 431         return plain;
 432 }
 433
 434 gchar *sgpgme_get_encrypt_data(GSList *recp_names, gpgme_protocol_t proto)
 435 {
 436         SelectionResult result = KEY_SELECTION_CANCEL;
 437         gpgme_key_t *keys = gpgmegtk_recipient_selection(recp_names, &result,
 438                                 proto);
 439         gchar *ret = NULL;
 440         int i = 0;
 441
 442         if (!keys) {
 443                 if (result == KEY_SELECTION_DONT)
 444                         return g_strdup("_DONT_ENCRYPT_");
 445                 else
 446                         return NULL;
 447         }
 448         while (keys[i]) {
 449                 gpgme_subkey_t skey = keys[i]->subkeys;
 450                 gchar *fpr = skey->fpr;
 451                 gchar *tmp = NULL;
 452                 debug_print("adding %s\n", fpr);
 453                 tmp = g_strconcat(ret?ret:"", fpr, " ", NULL);
 454                 g_free(ret);
 455                 ret = tmp;
 456                 i++;
 457         }
 458         return ret;
 459 }
 460
 461 gboolean sgpgme_setup_signers(gpgme_ctx_t ctx, PrefsAccount *account)
 462 {
 463         GPGAccountConfig *config;
 464
 465         gpgme_signers_clear(ctx);
 466
 467         config = prefs_gpg_account_get_config(account);
 468
 469         switch(config->sign_key) {
 470         case SIGN_KEY_DEFAULT:
 471                 debug_print("using default gnupg key\n");
 472                 break;
 473         case SIGN_KEY_BY_FROM:
 474                 debug_print("using key for %s\n", account->address);
 475                 break;
 476         case SIGN_KEY_CUSTOM:
 477                 debug_print("using key for %s\n", config->sign_key_id);
 478                 break;
 479         }
 480
 481         if (config->sign_key != SIGN_KEY_DEFAULT) {
 482                 gchar *keyid;
 483                 gpgme_key_t key, key2;
 484                 gpgme_error_t err;
 485
 486                 if (config->sign_key == SIGN_KEY_BY_FROM)
 487                         keyid = account->address;
 488                 else if (config->sign_key == SIGN_KEY_CUSTOM)
 489                         keyid = config->sign_key_id;
 490                 else
 491                         goto bail;
 492
 493                 err = gpgme_op_keylist_start(ctx, keyid, 1);
 494                 if (!err)
 495                         err = gpgme_op_keylist_next(ctx, &key);
 496                 if (err) {
 497                         g_warning("setup_signers start: %s", gpgme_strerror(err));
 498                         privacy_set_error(_("Secret key not found (%s)"), gpgme_strerror(err));
 499                         goto bail;
 500                 }
 501
 502                 err = gpgme_op_keylist_next(ctx, &key2);
 503                 if (!err) {
 504                         g_warning("ambiguous specification of secret key '%s'\n",
 505                                 keyid);
 506                         privacy_set_error(_("Secret key specification is ambiguous"));
 507                         goto bail;
 508                 }
 509
 510                 gpgme_op_keylist_end(ctx);
 511                 err = gpgme_signers_add(ctx, key);
 512                 gpgme_key_release(key);
 513
 514                 if (err) {
 515                         g_warning("error adding secret key: %s\n", gpgme_strerror(err));
 516                         privacy_set_error(_("Error setting secret key: %s"), gpgme_strerror(err));
 517                         goto bail;
 518                 }
 519         }
 520
 521         prefs_gpg_account_free_config(config);
 522
 523         return TRUE;
 524 bail:
 525         prefs_gpg_account_free_config(config);
 526         return FALSE;
 527 }
 528
 529 void sgpgme_init()
 530 {
 531         gpgme_engine_info_t engineInfo;
 532         if (gpgme_check_version("1.0.0")) {
 533 #ifdef LC_CTYPE
 534                 gpgme_set_locale(NULL, LC_CTYPE, setlocale(LC_CTYPE, NULL));
 535 #endif
 536 #ifdef LC_MESSAGES
 537                 gpgme_set_locale(NULL, LC_MESSAGES, setlocale(LC_MESSAGES, NULL));
 538 #endif
 539                 if (!gpgme_get_engine_info(&engineInfo)) {
 540                         while (engineInfo) {
 541                                 debug_print("GpgME Protocol: %s\n"
 542                                             "Version: %s (req %s)\n"
 543                                             "Executable: %s\n",
 544                                         gpgme_get_protocol_name(engineInfo->protocol),
 545                                         engineInfo->version ? engineInfo->version:"???",
 546                                         engineInfo->req_version ? engineInfo->req_version:"???",
 547                                         engineInfo->file_name ? engineInfo->file_name:"???");
 548                                 if (engineInfo->protocol == GPGME_PROTOCOL_OpenPGP
 549                                 &&  gpgme_engine_check_version(engineInfo->protocol) !=
 550                                         GPG_ERR_NO_ERROR) {
 551                                         if (engineInfo->file_name && !engineInfo->version) {
 552                                                 alertpanel_error(_("Gpgme protocol '%s' is unusable: "
 553                                                                    "Engine '%s' isn't installed properly."),
 554                                                                    gpgme_get_protocol_name(engineInfo->protocol),
 555                                                                    engineInfo->file_name);
 556                                         } else if (engineInfo->file_name && engineInfo->version
 557                                           && engineInfo->req_version) {
 558                                                 alertpanel_error(_("Gpgme protocol '%s' is unusable: "
 559                                                                    "Engine '%s' version %s is installed, "
 560                                                                    "but version %s is required.\n"),
 561                                                                    gpgme_get_protocol_name(engineInfo->protocol),
 562                                                                    engineInfo->file_name,
 563                                                                    engineInfo->version,
 564                                                                    engineInfo->req_version);
 565                                         } else {
 566                                                 alertpanel_error(_("Gpgme protocol '%s' is unusable "
 567                                                                    "(unknown problem)"),
 568                                                                    gpgme_get_protocol_name(engineInfo->protocol));
 569                                         }
 570                                 }
 571                                 engineInfo = engineInfo->next;
 572                         }
 573                 }
 574         } else {
 575                 sgpgme_disable_all();
 576
 577                 if (prefs_gpg_get_config()->gpg_warning) {
 578                         AlertValue val;
 579
 580                         val = alertpanel_full
 581                                 (_("Warning"),
 582                                  _("GnuPG is not installed properly, or needs "
 583                                  "to be upgraded.\n"
 584                                  "OpenPGP support disabled."),
 585                                  GTK_STOCK_CLOSE, NULL, NULL, TRUE, NULL,
 586                                  ALERT_WARNING, G_ALERTDEFAULT);
 587                         if (val & G_ALERTDISABLE)
 588                                 prefs_gpg_get_config()->gpg_warning = FALSE;
 589                 }
 590         }
 591 }
 592
 593 void sgpgme_done()
 594 {
 595         gpgmegtk_free_passphrase();
 596 }
 597
 598 void sgpgme_create_secret_key(PrefsAccount *account, gboolean ask_create)
 599 {
 600         AlertValue val = G_ALERTDEFAULT;
 601         gchar *key_parms = NULL;
 602         gchar *name = NULL;
 603         gchar *email = NULL;
 604         gchar *passphrase = NULL, *passphrase_second = NULL;
 605         gint prev_bad = 0;
 606         gchar *tmp = NULL;
 607         gpgme_error_t err = 0;
 608         gpgme_ctx_t ctx;
 609         GtkWidget *window = NULL;
 610         gpgme_genkey_result_t key;
 611
 612         if (account == NULL)
 613                 account = account_get_default();
 614
 615         if (account->address == NULL) {
 616                 alertpanel_error(_("You have to save the account's information with \"OK\" "
 617                                    "before being able to generate a key pair.\n"));
 618                 return;
 619         }
 620         if (ask_create) {
 621                 val = alertpanel(_("No PGP key found"),
 622                                 _("Claws Mail did not find a secret PGP key, "
 623                                   "which means that you won't be able to sign "
 624                                   "emails or receive encrypted emails.\n"
 625                                   "Do you want to create a new key pair now?"),
 626                                   GTK_STOCK_NO, "+" GTK_STOCK_YES, NULL);
 627                 if (val == G_ALERTDEFAULT) {
 628                         prefs_gpg_get_config()->gpg_ask_create_key = FALSE;
 629                         prefs_gpg_save_config();
 630                         return;
 631                 }
 632         }
 633
 634         if (account->name) {
 635                 name = g_strdup(account->name);
 636         } else {
 637                 name = g_strdup(account->address);
 638         }
 639         email = g_strdup(account->address);
 640         tmp = g_strdup_printf("%s <%s>", account->name?account->name:account->address, account->address);
 641 again:
 642         passphrase = passphrase_mbox(tmp, NULL, prev_bad, 1);
 643         if (passphrase == NULL) {
 644                 g_free(tmp);
 645                 g_free(email);
 646                 g_free(name);
 647                 return;
 648         }
 649         passphrase_second = passphrase_mbox(tmp, NULL, 0, 2);
 650         if (passphrase_second == NULL) {
 651                 g_free(tmp);
 652                 g_free(email);
 653                 g_free(passphrase);
 654                 g_free(name);
 655                 return;
 656         }
 657         if (strcmp(passphrase, passphrase_second)) {
 658                 g_free(passphrase);
 659                 g_free(passphrase_second);
 660                 prev_bad = 1;
 661                 goto again;
 662         }
 663
 664         key_parms = g_strdup_printf("<GnupgKeyParms format=\"internal\">\n"
 665                                         "Key-Type: DSA\n"
 666                                         "Key-Length: 1024\n"
 667                                         "Subkey-Type: ELG-E\n"
 668                                         "Subkey-Length: 2048\n"
 669                                         "Name-Real: %s\n"
 670                                         "Name-Email: %s\n"
 671                                         "Expire-Date: 0\n"
 672                                         "%s%s%s"
 673                                         "</GnupgKeyParms>\n",
 674                                         name, email,
 675                                         strlen(passphrase)?"Passphrase: ":"",
 676                                         passphrase,
 677                                         strlen(passphrase)?"\n":"");
 678 #ifndef G_PLATFORM_WIN32
 679         if (mlock(passphrase, strlen(passphrase)) == -1)
 680                 debug_print("couldn't lock passphrase\n");
 681         if (mlock(passphrase_second, strlen(passphrase_second)) == -1)
 682                 debug_print("couldn't lock passphrase2\n");
 683 #endif
 684         g_free(tmp);
 685         g_free(email);
 686         g_free(name);
 687         g_free(passphrase_second);
 688         g_free(passphrase);
 689
 690         err = gpgme_new (&ctx);
 691         if (err) {
 692                 alertpanel_error(_("Couldn't generate a new key pair: %s"),
 693                                  gpgme_strerror(err));
 694                 g_free(key_parms);
 695                 return;
 696         }
 697
 698
 699         window = label_window_create(_("Generating your new key pair... Please move the mouse "
 700                               "around to help generate entropy..."));
 701
 702         err = gpgme_op_genkey(ctx, key_parms, NULL, NULL);
 703         g_free(key_parms);
 704
 705         label_window_destroy(window);
 706
 707         if (err) {
 708                 alertpanel_error(_("Couldn't generate a new key pair: %s"), gpgme_strerror(err));
 709                 gpgme_release(ctx);
 710                 return;
 711         }
 712         key = gpgme_op_genkey_result(ctx);
 713         if (key == NULL) {
 714                 alertpanel_error(_("Couldn't generate a new key pair: unknown error"));
 715                 gpgme_release(ctx);
 716                 return;
 717         } else {
 718                 gchar *buf = g_strdup_printf(_("Your new key pair has been generated. "
 719                                     "Its fingerprint is:\n%s\n\nDo you want to export it "
 720                                     "to a keyserver?"),
 721                                     key->fpr ? key->fpr:"null");
 722                 AlertValue val = alertpanel(_("Key generated"), buf,
 723                                   GTK_STOCK_NO, "+" GTK_STOCK_YES, NULL);
 724                 g_free(buf);
 725                 if (val == G_ALERTALTERNATE) {
 726 #ifndef G_OS_WIN32
 727                         gchar *cmd = g_strdup_printf("gpg --no-tty --send-keys %s", key->fpr);
 728                         int res = 0;
 729                         pid_t pid = 0;
 730                         pid = fork();
 731                         if (pid == -1) {
 732                                 res = -1;
 733                         } else if (pid == 0) {
 734                                 /* son */
 735                                 res = system(cmd);
 736                                 res = WEXITSTATUS(res);
 737                                 _exit(res);
 738                         } else {
 739                                 int status = 0;
 740                                 time_t start_wait = time(NULL);
 741                                 res = -1;
 742                                 do {
 743                                         if (waitpid(pid, &status, WNOHANG) == 0 || !WIFEXITED(status)) {
 744                                                 usleep(200000);
 745                                         } else {
 746                                                 res = WEXITSTATUS(status);
 747                                                 break;
 748                                         }
 749                                         if (time(NULL) - start_wait > 5) {
 750                                                 debug_print("SIGTERM'ing gpg\n");
 751                                                 kill(pid, SIGTERM);
 752                                         }
 753                                         if (time(NULL) - start_wait > 6) {
 754                                                 debug_print("SIGKILL'ing gpg\n");
 755                                                 kill(pid, SIGKILL);
 756                                                 break;
 757                                         }
 758                                 } while(1);
 759                         }
 760                         if (res == 0) {
 761                                 alertpanel_notice(_("Key exported."));
 762                         } else {
 763                                 alertpanel_error(_("Couldn't export key."));
 764                         }
 765                         g_free(cmd);
 766 #else
 767                         alertpanel_error(_("Key export isn't implemented in Windows."));
 768 #endif
 769                 }
 770         }
 771         prefs_gpg_get_config()->gpg_ask_create_key = FALSE;
 772         prefs_gpg_save_config();
 773         gpgme_release(ctx);
 774 }
 775
 776 gboolean sgpgme_has_secret_key(void)
 777 {
 778         gpgme_error_t err = 0;
 779         gpgme_ctx_t ctx;
 780         gpgme_key_t key;
 781
 782         err = gpgme_new (&ctx);
 783         if (err) {
 784                 debug_print("err : %s\n", gpgme_strerror(err));
 785                 return TRUE;
 786         }
 787         err = gpgme_op_keylist_start(ctx, NULL, TRUE);
 788         if (!err)
 789                 err = gpgme_op_keylist_next(ctx, &key);
 790         gpgme_op_keylist_end(ctx);
 791         gpgme_release(ctx);
 792         if (gpg_err_code(err) == GPG_ERR_EOF)
 793                 return FALSE;
 794         else
 795                 return TRUE;
 796 }
 797
 798 void sgpgme_check_create_key(void)
 799 {
 800         if (prefs_gpg_get_config()->gpg_ask_create_key &&
 801             !sgpgme_has_secret_key()) {
 802                 sgpgme_create_secret_key(NULL, TRUE);
 803         } else {
 804                 prefs_gpg_get_config()->gpg_ask_create_key = FALSE;
 805                 prefs_gpg_save_config();
 806         }
 807 }
 808
 809 void *sgpgme_data_release_and_get_mem(gpgme_data_t data, size_t *len)
 810 {
 811         char buf[BUFSIZ];
 812         void *result = NULL;
 813         ssize_t r = 0;
 814         size_t w = 0;
 815
 816         if (data == NULL)
 817                 return NULL;
 818         if (len == NULL)
 819                 return NULL;
 820
 821         /* I know it's deprecated, but we don't compile with _LARGEFILE */
 822         gpgme_data_rewind(data);
 823         while ((r = gpgme_data_read(data, buf, BUFSIZ)) > 0) {
 824                 result = realloc(result, r + w);
 825                 memcpy(result+w, buf, r);
 826                 w += r;
 827         }
 828
 829         *len = w;
 830
 831         gpgme_data_release(data);
 832         if (r < 0) {
 833                 free(result);
 834                 *len = 0;
 835                 return NULL;
 836         }
 837         return result;
 838 }
 839 #endif /* USE_GPGME */