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