src/plugins/pgpcore/sgpgme.c

   1 /*
   2  * Claws Mail -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2012 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 #include "claws-features.h"
  23 #endif
  24
  25 #ifdef USE_GPGME
  26
  27 #include <time.h>
  28 #include <gtk/gtk.h>
  29 #include <gpgme.h>
  30 #include <glib.h>
  31 #include <glib/gi18n.h>
  32 #include <stdio.h>
  33 #include <string.h>
  34 #include <stdlib.h>
  35 #include <errno.h>
  36 #include <sys/types.h>
  37 #ifndef G_OS_WIN32
  38 #  include <sys/wait.h>
  39 #endif
  40 #if (defined(__DragonFly__) || defined(SOLARIS) || defined (__NetBSD__) || defined (__FreeBSD__) || defined (__OpenBSD__))
  41 #  include <sys/signal.h>
  42 #endif
  43 #ifndef G_OS_WIN32
  44 #include <sys/mman.h>
  45 #endif
  46 #if HAVE_LOCALE_H
  47 #  include <locale.h>
  48 #endif
  49
  50 #include "sgpgme.h"
  51 #include "privacy.h"
  52 #include "prefs_common.h"
  53 #include "utils.h"
  54 #include "alertpanel.h"
  55 #include "passphrase.h"
  56 #include "prefs_gpg.h"
  57 #include "account.h"
  58 #include "select-keys.h"
  59
  60 static void sgpgme_disable_all(void)
  61 {
  62     /* FIXME: set a flag, so that we don't bother the user with failed
  63      * gpgme messages */
  64 }
  65
  66 gpgme_verify_result_t sgpgme_verify_signature(gpgme_ctx_t ctx, gpgme_data_t sig,
  67                                         gpgme_data_t plain, gpgme_data_t dummy)
  68 {
  69         gpgme_verify_result_t status = NULL;
  70         gpgme_error_t err;
  71
  72         if ((err = gpgme_op_verify(ctx, sig, plain, dummy)) != GPG_ERR_NO_ERROR) {
  73                 debug_print("op_verify err %s\n", gpgme_strerror(err));
  74                 privacy_set_error("%s", gpgme_strerror(err));
  75                 return GINT_TO_POINTER(-GPG_ERR_SYSTEM_ERROR);
  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         gpgme_signature_t sig = NULL;
  89
  90         if (GPOINTER_TO_INT(status) == -GPG_ERR_SYSTEM_ERROR) {
  91                 debug_print("system error\n");
  92                 return SIGNATURE_CHECK_FAILED;
  93         }
  94
  95         if (status == NULL) {
  96                 debug_print("status == NULL\n");
  97                 return SIGNATURE_UNCHECKED;
  98         }
  99         sig = status->signatures;
 100
 101         if (sig == NULL) {
 102                 debug_print("sig == NULL\n");
 103                 return SIGNATURE_UNCHECKED;
 104         }
 105
 106         debug_print("err code %d\n", gpg_err_code(sig->status));
 107         switch (gpg_err_code(sig->status)) {
 108         case GPG_ERR_NO_ERROR:
 109                 switch (sig->validity) {
 110                 case GPGME_VALIDITY_NEVER:
 111                         return SIGNATURE_INVALID;
 112                 case GPGME_VALIDITY_UNKNOWN:
 113                 case GPGME_VALIDITY_UNDEFINED:
 114                 case GPGME_VALIDITY_MARGINAL:
 115                 case GPGME_VALIDITY_FULL:
 116                 case GPGME_VALIDITY_ULTIMATE:
 117                         return SIGNATURE_OK;
 118                 default:
 119                         return SIGNATURE_CHECK_FAILED;
 120                 }
 121         case GPG_ERR_SIG_EXPIRED:
 122         case GPG_ERR_CERT_REVOKED:
 123                 return SIGNATURE_WARN;
 124         case GPG_ERR_KEY_EXPIRED:
 125                 return SIGNATURE_KEY_EXPIRED;
 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         } else if (gpg_err_code(err) != GPG_ERR_NO_ERROR && gpg_err_code(err) != GPG_ERR_EOF) {
 203                 return g_strdup_printf(_("The signature can't be checked - %s"),
 204                         gpgme_strerror(err));
 205         }
 206         if (key)
 207                 uname = extract_name(key->uids->uid);
 208         else
 209                 uname = g_strdup("<?>");
 210         switch (gpg_err_code(sig->status)) {
 211         case GPG_ERR_NO_ERROR:
 212                 switch (gpg_err_code(sig->validity)) {
 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_MARGINAL:
 218                 case GPGME_VALIDITY_UNKNOWN:
 219                 case GPGME_VALIDITY_UNDEFINED:
 220                 case GPGME_VALIDITY_NEVER:
 221                 default:
 222                         result = g_strdup_printf(_("Good signature (untrusted) from %s."), uname);
 223                         break;
 224                 }
 225                 break;
 226         case GPG_ERR_SIG_EXPIRED:
 227                 result = g_strdup_printf(_("Expired signature from %s."), uname);
 228                 break;
 229         case GPG_ERR_KEY_EXPIRED:
 230                 result = g_strdup_printf(_("Good signature from %s, but the key has expired."), uname);
 231                 break;
 232         case GPG_ERR_CERT_REVOKED:
 233                 result = g_strdup_printf(_("Good signature from %s, but the key has been revoked."), uname);
 234                 break;
 235         case GPG_ERR_BAD_SIGNATURE:
 236                 result = g_strdup_printf(_("Bad signature from %s."), uname);
 237                 break;
 238         case GPG_ERR_NO_PUBKEY: {
 239                 gchar *id = g_strdup(sig->fpr + strlen(sig->fpr)-8);
 240                 result = g_strdup_printf(_("Key 0x%s not available to verify this signature."), id);
 241                 g_free(id);
 242                 break;
 243                 }
 244         default:
 245                 result = g_strdup(_("The signature has not been checked."));
 246                 break;
 247         }
 248         if (result == NULL)
 249                 result = g_strdup(_("Error"));
 250         g_free(uname);
 251         return result;
 252 }
 253
 254 gchar *sgpgme_sigstat_info_full(gpgme_ctx_t ctx, gpgme_verify_result_t status)
 255 {
 256         gint i = 0;
 257         gchar *ret;
 258         GString *siginfo;
 259         gpgme_signature_t sig = NULL;
 260
 261         siginfo = g_string_sized_new(64);
 262         if (status == NULL) {
 263                 g_string_append_printf(siginfo,
 264                         _("Error checking signature: no status\n"));
 265                 goto bail;
 266          }
 267
 268         sig = status->signatures;
 269
 270         while (sig) {
 271                 char buf[100];
 272                 struct tm lt;
 273                 gpgme_user_id_t user = NULL;
 274                 gpgme_key_t key;
 275                 gpgme_error_t err;
 276                 const gchar *keytype, *keyid, *uid;
 277
 278                 err = gpgme_get_key(ctx, sig->fpr, &key, 0);
 279
 280                 if (err != GPG_ERR_NO_ERROR) {
 281                         key = NULL;
 282                         g_string_append_printf(siginfo,
 283                                 _("Error checking signature: %s\n"),
 284                                 gpgme_strerror(err));
 285                         goto bail;
 286                 }
 287                 if (key) {
 288                         user = key->uids;
 289                         keytype = gpgme_pubkey_algo_name(
 290                                         key->subkeys->pubkey_algo);
 291                         keyid = key->subkeys->keyid;
 292                         uid = user->uid;
 293                 } else {
 294                         keytype = "?";
 295                         keyid = "?";
 296                         uid = "?";
 297                 }
 298
 299                 memset(buf, 0, sizeof(buf));
 300                 fast_strftime(buf, sizeof(buf)-1, prefs_common_get_prefs()->date_format, localtime_r(&sig->timestamp, &lt));
 301                 g_string_append_printf(siginfo,
 302                         _("Signature made on %s using %s key ID %s\n"),
 303                         buf, keytype, keyid);
 304
 305                 switch (gpg_err_code(sig->status)) {
 306                 case GPG_ERR_NO_ERROR:
 307                 case GPG_ERR_KEY_EXPIRED:
 308                         g_string_append_printf(siginfo,
 309                                 _("Good signature from uid \"%s\" (Validity: %s)\n"),
 310                                 uid, get_validity_str(user?user->validity:GPGME_VALIDITY_UNKNOWN));
 311                         break;
 312                 case GPG_ERR_SIG_EXPIRED:
 313                         g_string_append_printf(siginfo,
 314                                 _("Expired signature from uid \"%s\" (Validity: %s)\n"),
 315                                 uid, get_validity_str(user?user->validity:GPGME_VALIDITY_UNKNOWN));
 316                         break;
 317                 case GPG_ERR_CERT_EXPIRED:
 318                         g_string_append_printf(siginfo,
 319                                 _("Revoked key uid \"%s\"\n"),
 320                                 uid);
 321                         break;
 322                 case GPG_ERR_BAD_SIGNATURE:
 323                         g_string_append_printf(siginfo,
 324                                 _("BAD signature from \"%s\"\n"),
 325                                 uid);
 326                         break;
 327                 default:
 328                         break;
 329                 }
 330                 if (sig->status != GPG_ERR_BAD_SIGNATURE) {
 331                         gint j = 1;
 332                         user = user ? user->next : NULL;
 333                         while (user != NULL) {
 334                                 g_string_append_printf(siginfo,
 335                                         _("                    uid \"%s\" (Validity: %s)\n"),
 336                                         user->uid,
 337                                         get_validity_str(user->validity));
 338                                 j++;
 339                                 user = user->next;
 340                         }
 341                         g_string_append(siginfo,
 342                                 _("Primary key fingerprint:"));
 343                         const char* primary_fpr = NULL;
 344                         if (key && key->subkeys && key->subkeys->fpr)
 345                                 primary_fpr = key->subkeys->fpr;
 346                         else
 347                                 g_string_append(siginfo, " ?");
 348                         int idx; /* now pretty-print the fingerprint */
 349                         for (idx=0; primary_fpr && *primary_fpr!='\0'; idx++, primary_fpr++) {
 350                                 if (idx%4==0)
 351                                         g_string_append_c(siginfo, ' ');
 352                                 if (idx%20==0)
 353                                         g_string_append_c(siginfo, ' ');
 354                                 g_string_append_c(siginfo, (gchar)*primary_fpr);
 355                         }
 356                         g_string_append_c(siginfo, '\n');
 357 #ifdef HAVE_GPGME_PKA_TRUST
 358                         if (sig->pka_trust == 1 && sig->pka_address) {
 359                                 g_string_append_printf(siginfo,
 360                                    _("WARNING: Signer's address \"%s\" "
 361                                       "does not match DNS entry\n"),
 362                                    sig->pka_address);
 363                         }
 364                         else if (sig->pka_trust == 2 && sig->pka_address) {
 365                                 g_string_append_printf(siginfo,
 366                                    _("Verified signer's address is \"%s\"\n"),
 367                                    sig->pka_address);
 368                                 /* FIXME: Compare the address to the
 369                                  * From: address.  */
 370                         }
 371 #endif /*HAVE_GPGME_PKA_TRUST*/
 372                 }
 373
 374                 g_string_append(siginfo, "\n");
 375                 i++;
 376                 sig = sig->next;
 377         }
 378 bail:
 379         ret = siginfo->str;
 380         g_string_free(siginfo, FALSE);
 381         return ret;
 382 }
 383
 384 gpgme_data_t sgpgme_data_from_mimeinfo(MimeInfo *mimeinfo)
 385 {
 386         gpgme_data_t data = NULL;
 387         gpgme_error_t err;
 388         FILE *fp = g_fopen(mimeinfo->data.filename, "rb");
 389         gchar *tmp_file = NULL;
 390
 391         if (!fp)
 392                 return NULL;
 393
 394         tmp_file = get_tmp_file();
 395         copy_file_part(fp, mimeinfo->offset, mimeinfo->length, tmp_file);
 396         fclose(fp);
 397         fp = NULL;
 398         debug_print("tmp file %s\n", tmp_file);
 399
 400         err = gpgme_data_new_from_file(&data, tmp_file, 1);
 401         claws_unlink(tmp_file);
 402         g_free(tmp_file);
 403
 404         debug_print("data %p (%d %d)\n", (void *)&data, mimeinfo->offset, mimeinfo->length);
 405         if (err) {
 406                 debug_print ("gpgme_data_new_from_file failed: %s\n",
 407                              gpgme_strerror (err));
 408                 privacy_set_error(_("Couldn't get data from message, %s"), gpgme_strerror(err));
 409                 return NULL;
 410         }
 411         return data;
 412 }
 413
 414 gpgme_data_t sgpgme_decrypt_verify(gpgme_data_t cipher, gpgme_verify_result_t *status, gpgme_ctx_t ctx)
 415 {
 416         struct passphrase_cb_info_s info;
 417         gpgme_data_t plain;
 418         gpgme_error_t err;
 419
 420         memset (&info, 0, sizeof info);
 421
 422         if ((err = gpgme_data_new(&plain)) != GPG_ERR_NO_ERROR) {
 423                 gpgme_release(ctx);
 424                 privacy_set_error(_("Couldn't initialize data, %s"), gpgme_strerror(err));
 425                 return NULL;
 426         }
 427
 428         if (gpgme_get_protocol(ctx) == GPGME_PROTOCOL_OpenPGP) {
 429                 prefs_gpg_enable_agent(prefs_gpg_get_config()->use_gpg_agent);
 430                 if (!getenv("GPG_AGENT_INFO") || !prefs_gpg_get_config()->use_gpg_agent) {
 431                         info.c = ctx;
 432                         gpgme_set_passphrase_cb (ctx, gpgmegtk_passphrase_cb, &info);
 433                 }
 434         } else {
 435                 prefs_gpg_enable_agent(TRUE);
 436                 info.c = ctx;
 437                 gpgme_set_passphrase_cb (ctx, NULL, &info);
 438         }
 439
 440
 441         if (gpgme_get_protocol(ctx) == GPGME_PROTOCOL_OpenPGP) {
 442                 err = gpgme_op_decrypt_verify(ctx, cipher, plain);
 443                 if (err != GPG_ERR_NO_ERROR) {
 444                         debug_print("can't decrypt (%s)\n", gpgme_strerror(err));
 445                         privacy_set_error("%s", gpgme_strerror(err));
 446                         gpgmegtk_free_passphrase();
 447                         gpgme_data_release(plain);
 448                         return NULL;
 449                 }
 450
 451                 err = cm_gpgme_data_rewind(plain);
 452                 if (err) {
 453                         debug_print("can't seek (%d %d %s)\n", err, errno, strerror(errno));
 454                 }
 455
 456                 debug_print("decrypted.\n");
 457                 *status = gpgme_op_verify_result (ctx);
 458         } else {
 459                 err = gpgme_op_decrypt(ctx, cipher, plain);
 460                 if (err != GPG_ERR_NO_ERROR) {
 461                         debug_print("can't decrypt (%s)\n", gpgme_strerror(err));
 462                         privacy_set_error("%s", gpgme_strerror(err));
 463                         gpgmegtk_free_passphrase();
 464                         gpgme_data_release(plain);
 465                         return NULL;
 466                 }
 467
 468                 err = cm_gpgme_data_rewind(plain);
 469                 if (err) {
 470                         debug_print("can't seek (%d %d %s)\n", err, errno, strerror(errno));
 471                 }
 472
 473                 debug_print("decrypted.\n");
 474                 *status = gpgme_op_verify_result (ctx);
 475         }
 476         return plain;
 477 }
 478
 479 gchar *sgpgme_get_encrypt_data(GSList *recp_names, gpgme_protocol_t proto)
 480 {
 481         SelectionResult result = KEY_SELECTION_CANCEL;
 482         gpgme_key_t *keys = gpgmegtk_recipient_selection(recp_names, &result,
 483                                 proto);
 484         gchar *ret = NULL;
 485         int i = 0;
 486
 487         if (!keys) {
 488                 if (result == KEY_SELECTION_DONT)
 489                         return g_strdup("_DONT_ENCRYPT_");
 490                 else
 491                         return NULL;
 492         }
 493         while (keys[i]) {
 494                 gpgme_subkey_t skey = keys[i]->subkeys;
 495                 gchar *fpr = skey->fpr;
 496                 gchar *tmp = NULL;
 497                 debug_print("adding %s\n", fpr);
 498                 tmp = g_strconcat(ret?ret:"", fpr, " ", NULL);
 499                 g_free(ret);
 500                 ret = tmp;
 501                 i++;
 502         }
 503         return ret;
 504 }
 505
 506 gboolean sgpgme_setup_signers(gpgme_ctx_t ctx, PrefsAccount *account,
 507                               const gchar *from_addr)
 508 {
 509         GPGAccountConfig *config;
 510         const gchar *signer_addr = account->address;
 511
 512         gpgme_signers_clear(ctx);
 513
 514         if (from_addr)
 515                 signer_addr = from_addr;
 516         config = prefs_gpg_account_get_config(account);
 517
 518         switch(config->sign_key) {
 519         case SIGN_KEY_DEFAULT:
 520                 debug_print("using default gnupg key\n");
 521                 break;
 522         case SIGN_KEY_BY_FROM:
 523                 debug_print("using key for %s\n", signer_addr);
 524                 break;
 525         case SIGN_KEY_CUSTOM:
 526                 debug_print("using key for %s\n", config->sign_key_id);
 527                 break;
 528         }
 529
 530         if (config->sign_key != SIGN_KEY_DEFAULT) {
 531                 const gchar *keyid;
 532                 gpgme_key_t key, found_key;
 533                 gpgme_error_t err;
 534
 535                 if (config->sign_key == SIGN_KEY_BY_FROM)
 536                         keyid = signer_addr;
 537                 else if (config->sign_key == SIGN_KEY_CUSTOM)
 538                         keyid = config->sign_key_id;
 539                 else
 540                         goto bail;
 541
 542                 found_key = NULL;
 543                 /* Look for any key, not just private ones, or GPGMe doesn't
 544                  * correctly set the revoked flag. */
 545                 err = gpgme_op_keylist_start(ctx, keyid, 0);
 546                 while ((err = gpgme_op_keylist_next(ctx, &key)) == 0) {
 547                         if (key == NULL)
 548                                 continue;
 549
 550                         if (!key->can_sign)
 551                                 continue;
 552
 553                         if (key->protocol != gpgme_get_protocol(ctx)) {
 554                                 debug_print("skipping a key (wrong protocol %d)\n", key->protocol);
 555                                 gpgme_key_release(key);
 556                                 continue;
 557                         }
 558
 559                         if (key->expired) {
 560                                 debug_print("skipping a key, expired");
 561                                 gpgme_key_release(key);
 562                                 continue;
 563                         }
 564                         if (key->revoked) {
 565                                 debug_print("skipping a key, revoked");
 566                                 gpgme_key_release(key);
 567                                 continue;
 568                         }
 569                         if (key->disabled) {
 570                                 debug_print("skipping a key, disabled");
 571                                 gpgme_key_release(key);
 572                                 continue;
 573                         }
 574
 575                         if (found_key != NULL) {
 576                                 gpgme_key_release(key);
 577                                 gpgme_op_keylist_end(ctx);
 578                                 g_warning("ambiguous specification of secret key '%s'\n", keyid);
 579                                 privacy_set_error(_("Secret key specification is ambiguous"));
 580                                 goto bail;
 581                         }
 582
 583                         found_key = key;
 584                 }
 585                 gpgme_op_keylist_end(ctx);
 586
 587                 if (found_key == NULL) {
 588                         g_warning("setup_signers start: %s", gpgme_strerror(err));
 589                         privacy_set_error(_("Secret key not found (%s)"), gpgme_strerror(err));
 590                         goto bail;
 591                 }
 592
 593                 err = gpgme_signers_add(ctx, found_key);
 594                 debug_print("got key (proto %d (pgp %d, smime %d).\n",
 595                             found_key->protocol, GPGME_PROTOCOL_OpenPGP,
 596                             GPGME_PROTOCOL_CMS);
 597                 gpgme_key_release(found_key);
 598
 599                 if (err) {
 600                         g_warning("error adding secret key: %s\n",
 601                                   gpgme_strerror(err));
 602                         privacy_set_error(_("Error setting secret key: %s"),
 603                                           gpgme_strerror(err));
 604                         goto bail;
 605                 }
 606         }
 607
 608         prefs_gpg_account_free_config(config);
 609
 610         return TRUE;
 611 bail:
 612         prefs_gpg_account_free_config(config);
 613         return FALSE;
 614 }
 615
 616 void sgpgme_init()
 617 {
 618         gchar *ctype_locale = NULL, *messages_locale = NULL;
 619         gchar *ctype_utf8_locale = NULL, *messages_utf8_locale = NULL;
 620
 621         gpgme_engine_info_t engineInfo;
 622         if (gpgme_check_version("1.0.0")) {
 623 #ifdef LC_CTYPE
 624                 debug_print("setting gpgme CTYPE locale\n");
 625 #ifdef G_OS_WIN32
 626                 ctype_locale = g_win32_getlocale();
 627 #else
 628                 ctype_locale = g_strdup(setlocale(LC_CTYPE, NULL));
 629 #endif
 630                 if (ctype_locale) {
 631                         debug_print("setting gpgme CTYPE locale to: %s\n", ctype_locale);
 632                         if (strchr(ctype_locale, '.'))
 633                                 *(strchr(ctype_locale, '.')) = '\0';
 634                         else if (strchr(ctype_locale, '@'))
 635                                 *(strchr(ctype_locale, '@')) = '\0';
 636                         ctype_utf8_locale = g_strconcat(ctype_locale, ".UTF-8", NULL);
 637
 638                         debug_print("setting gpgme locale to UTF8: %s\n", ctype_utf8_locale ? ctype_utf8_locale : "NULL");
 639                         gpgme_set_locale(NULL, LC_CTYPE, ctype_utf8_locale);
 640
 641                         debug_print("done\n");
 642                         g_free(ctype_utf8_locale);
 643                         g_free(ctype_locale);
 644                 } else {
 645                         debug_print("couldn't set gpgme CTYPE locale\n");
 646                 }
 647 #endif
 648 #ifdef LC_MESSAGES
 649                 debug_print("setting gpgme MESSAGES locale\n");
 650 #ifdef G_OS_WIN32
 651                 messages_locale = g_win32_getlocale();
 652 #else
 653                 messages_locale = g_strdup(setlocale(LC_MESSAGES, NULL));
 654 #endif
 655                 if (messages_locale) {
 656                         debug_print("setting gpgme MESSAGES locale to: %s\n", messages_locale);
 657                         if (strchr(messages_locale, '.'))
 658                                 *(strchr(messages_locale, '.')) = '\0';
 659                         else if (strchr(messages_locale, '@'))
 660                                 *(strchr(messages_locale, '@')) = '\0';
 661                         messages_utf8_locale = g_strconcat(messages_locale, ".UTF-8", NULL);
 662                         debug_print("setting gpgme locale to UTF8: %s\n", messages_utf8_locale ? messages_utf8_locale : "NULL");
 663
 664                         gpgme_set_locale(NULL, LC_MESSAGES, messages_utf8_locale);
 665
 666                         debug_print("done\n");
 667                         g_free(messages_utf8_locale);
 668                         g_free(messages_locale);
 669                 } else {
 670                         debug_print("couldn't set gpgme MESSAGES locale\n");
 671                 }
 672 #endif
 673                 if (!gpgme_get_engine_info(&engineInfo)) {
 674                         while (engineInfo) {
 675                                 debug_print("GpgME Protocol: %s\n"
 676                                             "Version: %s (req %s)\n"
 677                                             "Executable: %s\n",
 678                                         gpgme_get_protocol_name(engineInfo->protocol) ? gpgme_get_protocol_name(engineInfo->protocol):"???",
 679                                         engineInfo->version ? engineInfo->version:"???",
 680                                         engineInfo->req_version ? engineInfo->req_version:"???",
 681                                         engineInfo->file_name ? engineInfo->file_name:"???");
 682                                 if (engineInfo->protocol == GPGME_PROTOCOL_OpenPGP
 683                                 &&  gpgme_engine_check_version(engineInfo->protocol) !=
 684                                         GPG_ERR_NO_ERROR) {
 685                                         if (engineInfo->file_name && !engineInfo->version) {
 686                                                 alertpanel_error(_("Gpgme protocol '%s' is unusable: "
 687                                                                    "Engine '%s' isn't installed properly."),
 688                                                                    gpgme_get_protocol_name(engineInfo->protocol),
 689                                                                    engineInfo->file_name);
 690                                         } else if (engineInfo->file_name && engineInfo->version
 691                                           && engineInfo->req_version) {
 692                                                 alertpanel_error(_("Gpgme protocol '%s' is unusable: "
 693                                                                    "Engine '%s' version %s is installed, "
 694                                                                    "but version %s is required.\n"),
 695                                                                    gpgme_get_protocol_name(engineInfo->protocol),
 696                                                                    engineInfo->file_name,
 697                                                                    engineInfo->version,
 698                                                                    engineInfo->req_version);
 699                                         } else {
 700                                                 alertpanel_error(_("Gpgme protocol '%s' is unusable "
 701                                                                    "(unknown problem)"),
 702                                                                    gpgme_get_protocol_name(engineInfo->protocol));
 703                                         }
 704                                 }
 705                                 engineInfo = engineInfo->next;
 706                         }
 707                 }
 708         } else {
 709                 sgpgme_disable_all();
 710
 711                 if (prefs_gpg_get_config()->gpg_warning) {
 712                         AlertValue val;
 713
 714                         val = alertpanel_full
 715                                 (_("Warning"),
 716                                  _("GnuPG is not installed properly, or needs "
 717                                  "to be upgraded.\n"
 718                                  "OpenPGP support disabled."),
 719                                  GTK_STOCK_CLOSE, NULL, NULL, TRUE, NULL,
 720                                  ALERT_WARNING, G_ALERTDEFAULT);
 721                         if (val & G_ALERTDISABLE)
 722                                 prefs_gpg_get_config()->gpg_warning = FALSE;
 723                 }
 724         }
 725 }
 726
 727 void sgpgme_done()
 728 {
 729         gpgmegtk_free_passphrase();
 730 }
 731
 732 void sgpgme_create_secret_key(PrefsAccount *account, gboolean ask_create)
 733 {
 734         AlertValue val = G_ALERTDEFAULT;
 735         gchar *key_parms = NULL;
 736         gchar *name = NULL;
 737         gchar *email = NULL;
 738         gchar *passphrase = NULL, *passphrase_second = NULL;
 739         gint prev_bad = 0;
 740         gchar *tmp = NULL;
 741         gpgme_error_t err = 0;
 742         gpgme_ctx_t ctx;
 743         GtkWidget *window = NULL;
 744         gpgme_genkey_result_t key;
 745
 746         if (account == NULL)
 747                 account = account_get_default();
 748
 749         if (account->address == NULL) {
 750                 alertpanel_error(_("You have to save the account's information with \"OK\" "
 751                                    "before being able to generate a key pair.\n"));
 752                 return;
 753         }
 754         if (ask_create) {
 755                 val = alertpanel(_("No PGP key found"),
 756                                 _("Claws Mail did not find a secret PGP key, "
 757                                   "which means that you won't be able to sign "
 758                                   "emails or receive encrypted emails.\n"
 759                                   "Do you want to create a new key pair now?"),
 760                                   GTK_STOCK_NO, "+" GTK_STOCK_YES, NULL);
 761                 if (val == G_ALERTDEFAULT) {
 762                         prefs_gpg_get_config()->gpg_ask_create_key = FALSE;
 763                         prefs_gpg_save_config();
 764                         return;
 765                 }
 766         }
 767
 768         if (account->name) {
 769                 name = g_strdup(account->name);
 770         } else {
 771                 name = g_strdup(account->address);
 772         }
 773         email = g_strdup(account->address);
 774         tmp = g_strdup_printf("%s <%s>", account->name?account->name:account->address, account->address);
 775 again:
 776         passphrase = passphrase_mbox(tmp, NULL, prev_bad, 1);
 777         if (passphrase == NULL) {
 778                 g_free(tmp);
 779                 g_free(email);
 780                 g_free(name);
 781                 return;
 782         }
 783         passphrase_second = passphrase_mbox(tmp, NULL, 0, 2);
 784         if (passphrase_second == NULL) {
 785                 g_free(tmp);
 786                 g_free(email);
 787                 g_free(passphrase);
 788                 g_free(name);
 789                 return;
 790         }
 791         if (strcmp(passphrase, passphrase_second)) {
 792                 g_free(passphrase);
 793                 g_free(passphrase_second);
 794                 prev_bad = 1;
 795                 goto again;
 796         }
 797
 798         key_parms = g_strdup_printf("<GnupgKeyParms format=\"internal\">\n"
 799                                         "Key-Type: RSA\n"
 800                                         "Key-Length: 2048\n"
 801                                         "Subkey-Type: RSA\n"
 802                                         "Subkey-Length: 2048\n"
 803                                         "Name-Real: %s\n"
 804                                         "Name-Email: %s\n"
 805                                         "Expire-Date: 0\n"
 806                                         "%s%s%s"
 807                                         "</GnupgKeyParms>\n",
 808                                         name, email,
 809                                         strlen(passphrase)?"Passphrase: ":"",
 810                                         passphrase,
 811                                         strlen(passphrase)?"\n":"");
 812 #ifndef G_PLATFORM_WIN32
 813         if (mlock(passphrase, strlen(passphrase)) == -1)
 814                 debug_print("couldn't lock passphrase\n");
 815         if (mlock(passphrase_second, strlen(passphrase_second)) == -1)
 816                 debug_print("couldn't lock passphrase2\n");
 817 #endif
 818         g_free(tmp);
 819         g_free(email);
 820         g_free(name);
 821         g_free(passphrase_second);
 822         g_free(passphrase);
 823
 824         err = gpgme_new (&ctx);
 825         if (err) {
 826                 alertpanel_error(_("Couldn't generate a new key pair: %s"),
 827                                  gpgme_strerror(err));
 828                 g_free(key_parms);
 829                 return;
 830         }
 831
 832
 833         window = label_window_create(_("Generating your new key pair... Please move the mouse "
 834                               "around to help generate entropy..."));
 835
 836         err = gpgme_op_genkey(ctx, key_parms, NULL, NULL);
 837         g_free(key_parms);
 838
 839         label_window_destroy(window);
 840
 841         if (err) {
 842                 alertpanel_error(_("Couldn't generate a new key pair: %s"), gpgme_strerror(err));
 843                 gpgme_release(ctx);
 844                 return;
 845         }
 846         key = gpgme_op_genkey_result(ctx);
 847         if (key == NULL) {
 848                 alertpanel_error(_("Couldn't generate a new key pair: unknown error"));
 849                 gpgme_release(ctx);
 850                 return;
 851         } else {
 852                 gchar *buf = g_strdup_printf(_("Your new key pair has been generated. "
 853                                     "Its fingerprint is:\n%s\n\nDo you want to export it "
 854                                     "to a keyserver?"),
 855                                     key->fpr ? key->fpr:"null");
 856                 AlertValue val = alertpanel(_("Key generated"), buf,
 857                                   GTK_STOCK_NO, "+" GTK_STOCK_YES, NULL);
 858                 g_free(buf);
 859                 if (val == G_ALERTALTERNATE) {
 860 #ifndef G_OS_WIN32
 861                         gchar *cmd = g_strdup_printf("gpg --no-tty --send-keys %s", key->fpr);
 862                         int res = 0;
 863                         pid_t pid = 0;
 864                         pid = fork();
 865                         if (pid == -1) {
 866                                 res = -1;
 867                         } else if (pid == 0) {
 868                                 /* son */
 869                                 res = system(cmd);
 870                                 res = WEXITSTATUS(res);
 871                                 _exit(res);
 872                         } else {
 873                                 int status = 0;
 874                                 time_t start_wait = time(NULL);
 875                                 res = -1;
 876                                 do {
 877                                         if (waitpid(pid, &status, WNOHANG) == 0 || !WIFEXITED(status)) {
 878                                                 usleep(200000);
 879                                         } else {
 880                                                 res = WEXITSTATUS(status);
 881                                                 break;
 882                                         }
 883                                         if (time(NULL) - start_wait > 5) {
 884                                                 debug_print("SIGTERM'ing gpg\n");
 885                                                 kill(pid, SIGTERM);
 886                                         }
 887                                         if (time(NULL) - start_wait > 6) {
 888                                                 debug_print("SIGKILL'ing gpg\n");
 889                                                 kill(pid, SIGKILL);
 890                                                 break;
 891                                         }
 892                                 } while(1);
 893                         }
 894                         if (res == 0) {
 895                                 alertpanel_notice(_("Key exported."));
 896                         } else {
 897                                 alertpanel_error(_("Couldn't export key."));
 898                         }
 899                         g_free(cmd);
 900 #else
 901                         alertpanel_error(_("Key export isn't implemented in Windows."));
 902 #endif
 903                 }
 904         }
 905         prefs_gpg_get_config()->gpg_ask_create_key = FALSE;
 906         prefs_gpg_save_config();
 907         gpgme_release(ctx);
 908 }
 909
 910 gboolean sgpgme_has_secret_key(void)
 911 {
 912         gpgme_error_t err = 0;
 913         gpgme_ctx_t ctx;
 914         gpgme_key_t key;
 915
 916         err = gpgme_new (&ctx);
 917         if (err) {
 918                 debug_print("err : %s\n", gpgme_strerror(err));
 919                 return TRUE;
 920         }
 921 check_again:
 922         err = gpgme_op_keylist_start(ctx, NULL, TRUE);
 923         if (!err)
 924                 err = gpgme_op_keylist_next(ctx, &key);
 925         gpgme_op_keylist_end(ctx);
 926         if (gpg_err_code(err) == GPG_ERR_EOF) {
 927                 if (gpgme_get_protocol(ctx) != GPGME_PROTOCOL_CMS) {
 928                         gpgme_set_protocol(ctx, GPGME_PROTOCOL_CMS);
 929                         goto check_again;
 930                 }
 931                 gpgme_release(ctx);
 932                 return FALSE;
 933         } else {
 934                 gpgme_release(ctx);
 935                 return TRUE;
 936         }
 937 }
 938
 939 void sgpgme_check_create_key(void)
 940 {
 941         if (prefs_gpg_get_config()->gpg_ask_create_key &&
 942             !sgpgme_has_secret_key()) {
 943                 sgpgme_create_secret_key(NULL, TRUE);
 944         } else {
 945                 prefs_gpg_get_config()->gpg_ask_create_key = FALSE;
 946                 prefs_gpg_save_config();
 947         }
 948 }
 949
 950 void *sgpgme_data_release_and_get_mem(gpgme_data_t data, size_t *len)
 951 {
 952         char buf[BUFSIZ];
 953         void *result = NULL;
 954         ssize_t r = 0;
 955         size_t w = 0;
 956
 957         if (data == NULL)
 958                 return NULL;
 959         if (len == NULL)
 960                 return NULL;
 961
 962         /* I know it's deprecated, but we don't compile with _LARGEFILE */
 963         cm_gpgme_data_rewind(data);
 964         while ((r = gpgme_data_read(data, buf, BUFSIZ)) > 0) {
 965                 result = realloc(result, r + w);
 966                 if (result == NULL) {
 967                         g_warning("can't allocate memory\n");
 968                         return NULL;
 969                 }
 970                 memcpy(result+w, buf, r);
 971                 w += r;
 972         }
 973
 974         *len = w;
 975
 976         gpgme_data_release(data);
 977         if (r < 0) {
 978                 free(result);
 979                 *len = 0;
 980                 return NULL;
 981         }
 982         return result;
 983 }
 984
 985 gpgme_error_t cm_gpgme_data_rewind(gpgme_data_t dh)
 986 {
 987 #if defined(_FILE_OFFSET_BITS) && _FILE_OFFSET_BITS == 64
 988         if (gpgme_data_seek(dh, (off_t)0, SEEK_SET) == -1)
 989                 return gpg_error_from_errno(errno);
 990         else
 991                 return 0;
 992 #else
 993         return gpgme_data_rewind(dh);
 994 #endif
 995 }
 996
 997 #endif /* USE_GPGME */