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