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 (gpg_err_code(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(_("Expired key from %s."), uname);
 231                 break;
 232         case GPG_ERR_BAD_SIGNATURE:
 233                 result = g_strdup_printf(_("Bad signature from %s."), uname);
 234                 break;
 235         case GPG_ERR_NO_PUBKEY: {
 236                 gchar *id = g_strdup(sig->fpr + strlen(sig->fpr)-8);
 237                 result = g_strdup_printf(_("Key 0x%s not available to verify this signature."), id);
 238                 g_free(id);
 239                 break;
 240                 }
 241         default:
 242                 result = g_strdup(_("The signature has not been checked."));
 243                 break;
 244         }
 245         if (result == NULL)
 246                 result = g_strdup(_("Error"));
 247         g_free(uname);
 248         return result;
 249 }
 250
 251 gchar *sgpgme_sigstat_info_full(gpgme_ctx_t ctx, gpgme_verify_result_t status)
 252 {
 253         gint i = 0;
 254         gchar *ret;
 255         GString *siginfo;
 256         gpgme_signature_t sig = NULL;
 257
 258         siginfo = g_string_sized_new(64);
 259         if (status == NULL) {
 260                 g_string_append_printf(siginfo,
 261                         _("Error checking signature: no status\n"));
 262                 goto bail;
 263          }
 264
 265         sig = status->signatures;
 266
 267         while (sig) {
 268                 char buf[100];
 269                 struct tm lt;
 270                 gpgme_user_id_t user = NULL;
 271                 gpgme_key_t key;
 272                 gpgme_error_t err;
 273                 const gchar *keytype, *keyid, *uid;
 274
 275                 err = gpgme_get_key(ctx, sig->fpr, &key, 0);
 276
 277                 if (err != GPG_ERR_NO_ERROR) {
 278                         key = NULL;
 279                         g_string_append_printf(siginfo,
 280                                 _("Error checking signature: %s\n"),
 281                                 gpgme_strerror(err));
 282                         goto bail;
 283                 }
 284                 if (key) {
 285                         user = key->uids;
 286                         keytype = gpgme_pubkey_algo_name(
 287                                         key->subkeys->pubkey_algo);
 288                         keyid = key->subkeys->keyid;
 289                         uid = user->uid;
 290                 } else {
 291                         keytype = "?";
 292                         keyid = "?";
 293                         uid = "?";
 294                 }
 295
 296                 memset(buf, 0, sizeof(buf));
 297                 fast_strftime(buf, sizeof(buf)-1, prefs_common.date_format, localtime_r(&sig->timestamp, &lt));
 298                 g_string_append_printf(siginfo,
 299                         _("Signature made on %s using %s key ID %s\n"),
 300                         buf, keytype, keyid);
 301
 302                 switch (gpg_err_code(sig->status)) {
 303                 case GPG_ERR_NO_ERROR:
 304                 case GPG_ERR_KEY_EXPIRED:
 305                         g_string_append_printf(siginfo,
 306                                 _("Good signature from uid \"%s\" (Validity: %s)\n"),
 307                                 uid, get_validity_str(user?user->validity:GPGME_VALIDITY_UNKNOWN));
 308                         break;
 309                 case GPG_ERR_SIG_EXPIRED:
 310                         g_string_append_printf(siginfo,
 311                                 _("Expired signature from uid \"%s\" (Validity: %s)\n"),
 312                                 uid, get_validity_str(user?user->validity:GPGME_VALIDITY_UNKNOWN));
 313                         break;
 314                 case GPG_ERR_BAD_SIGNATURE:
 315                         g_string_append_printf(siginfo,
 316                                 _("BAD signature from \"%s\"\n"),
 317                                 uid);
 318                         break;
 319                 default:
 320                         break;
 321                 }
 322                 if (sig->status != GPG_ERR_BAD_SIGNATURE) {
 323                         gint j = 1;
 324                         user = user ? user->next : NULL;
 325                         while (user != NULL) {
 326                                 g_string_append_printf(siginfo,
 327                                         _("                    uid \"%s\" (Validity: %s)\n"),
 328                                         user->uid,
 329                                         get_validity_str(user->validity));
 330                                 j++;
 331                                 user = user->next;
 332                         }
 333                         g_string_append(siginfo,
 334                                 _("Primary key fingerprint:"));
 335                         const char* primary_fpr = NULL;
 336                         if (key && key->subkeys && key->subkeys->fpr)
 337                                 primary_fpr = key->subkeys->fpr;
 338                         else
 339                                 g_string_append(siginfo, " ?");
 340                         int idx; /* now pretty-print the fingerprint */
 341                         for (idx=0; primary_fpr && *primary_fpr!='\0'; idx++, primary_fpr++) {
 342                                 if (idx%4==0)
 343                                         g_string_append_c(siginfo, ' ');
 344                                 if (idx%20==0)
 345                                         g_string_append_c(siginfo, ' ');
 346                                 g_string_append_c(siginfo, (gchar)*primary_fpr);
 347                         }
 348                         g_string_append_c(siginfo, '\n');
 349 #ifdef HAVE_GPGME_PKA_TRUST
 350                         if (sig->pka_trust == 1 && sig->pka_address) {
 351                                 g_string_append_printf(siginfo,
 352                                    _("WARNING: Signer's address \"%s\" "
 353                                       "does not match DNS entry\n"),
 354                                    sig->pka_address);
 355                         }
 356                         else if (sig->pka_trust == 2 && sig->pka_address) {
 357                                 g_string_append_printf(siginfo,
 358                                    _("Verified signer's address is \"%s\"\n"),
 359                                    sig->pka_address);
 360                                 /* FIXME: Compare the address to the
 361                                  * From: address.  */
 362                         }
 363 #endif /*HAVE_GPGME_PKA_TRUST*/
 364                 }
 365
 366                 g_string_append(siginfo, "\n");
 367                 i++;
 368                 sig = sig->next;
 369         }
 370 bail:
 371         ret = siginfo->str;
 372         g_string_free(siginfo, FALSE);
 373         return ret;
 374 }
 375
 376 gpgme_data_t sgpgme_data_from_mimeinfo(MimeInfo *mimeinfo)
 377 {
 378         gpgme_data_t data = NULL;
 379         gpgme_error_t err;
 380         FILE *fp = g_fopen(mimeinfo->data.filename, "rb");
 381         gchar *tmp_file = NULL;
 382
 383         if (!fp)
 384                 return NULL;
 385
 386         tmp_file = get_tmp_file();
 387         copy_file_part(fp, mimeinfo->offset, mimeinfo->length, tmp_file);
 388         fclose(fp);
 389         fp = NULL;
 390         debug_print("tmp file %s\n", tmp_file);
 391
 392         err = gpgme_data_new_from_file(&data, tmp_file, 1);
 393         claws_unlink(tmp_file);
 394         g_free(tmp_file);
 395
 396         debug_print("data %p (%d %d)\n", (void *)&data, mimeinfo->offset, mimeinfo->length);
 397         if (err) {
 398                 debug_print ("gpgme_data_new_from_file failed: %s\n",
 399                              gpgme_strerror (err));
 400                 privacy_set_error(_("Couldn't get data from message, %s"), gpgme_strerror(err));
 401                 return NULL;
 402         }
 403         return data;
 404 }
 405
 406 gpgme_data_t sgpgme_decrypt_verify(gpgme_data_t cipher, gpgme_verify_result_t *status, gpgme_ctx_t ctx)
 407 {
 408         struct passphrase_cb_info_s info;
 409         gpgme_data_t plain;
 410         gpgme_error_t err;
 411
 412         memset (&info, 0, sizeof info);
 413
 414         if ((err = gpgme_data_new(&plain)) != GPG_ERR_NO_ERROR) {
 415                 gpgme_release(ctx);
 416                 privacy_set_error(_("Couldn't initialize data, %s"), gpgme_strerror(err));
 417                 return NULL;
 418         }
 419
 420         if (gpgme_get_protocol(ctx) == GPGME_PROTOCOL_OpenPGP) {
 421                 prefs_gpg_enable_agent(prefs_gpg_get_config()->use_gpg_agent);
 422                 if (!getenv("GPG_AGENT_INFO") || !prefs_gpg_get_config()->use_gpg_agent) {
 423                         info.c = ctx;
 424                         gpgme_set_passphrase_cb (ctx, gpgmegtk_passphrase_cb, &info);
 425                 }
 426         } else {
 427                 prefs_gpg_enable_agent(TRUE);
 428                 info.c = ctx;
 429                 gpgme_set_passphrase_cb (ctx, NULL, &info);
 430         }
 431
 432
 433         if (gpgme_get_protocol(ctx) == GPGME_PROTOCOL_OpenPGP) {
 434                 err = gpgme_op_decrypt_verify(ctx, cipher, plain);
 435                 if (err != GPG_ERR_NO_ERROR) {
 436                         debug_print("can't decrypt (%s)\n", gpgme_strerror(err));
 437                         privacy_set_error("%s", gpgme_strerror(err));
 438                         gpgmegtk_free_passphrase();
 439                         gpgme_data_release(plain);
 440                         return NULL;
 441                 }
 442
 443                 err = cm_gpgme_data_rewind(plain);
 444                 if (err) {
 445                         debug_print("can't seek (%d %d %s)\n", err, errno, strerror(errno));
 446                 }
 447
 448                 debug_print("decrypted.\n");
 449                 *status = gpgme_op_verify_result (ctx);
 450         } else {
 451                 err = gpgme_op_decrypt(ctx, cipher, plain);
 452                 if (err != GPG_ERR_NO_ERROR) {
 453                         debug_print("can't decrypt (%s)\n", gpgme_strerror(err));
 454                         privacy_set_error("%s", gpgme_strerror(err));
 455                         gpgmegtk_free_passphrase();
 456                         gpgme_data_release(plain);
 457                         return NULL;
 458                 }
 459
 460                 err = cm_gpgme_data_rewind(plain);
 461                 if (err) {
 462                         debug_print("can't seek (%d %d %s)\n", err, errno, strerror(errno));
 463                 }
 464
 465                 debug_print("decrypted.\n");
 466                 *status = gpgme_op_verify_result (ctx);
 467         }
 468         return plain;
 469 }
 470
 471 gchar *sgpgme_get_encrypt_data(GSList *recp_names, gpgme_protocol_t proto)
 472 {
 473         SelectionResult result = KEY_SELECTION_CANCEL;
 474         gpgme_key_t *keys = gpgmegtk_recipient_selection(recp_names, &result,
 475                                 proto);
 476         gchar *ret = NULL;
 477         int i = 0;
 478
 479         if (!keys) {
 480                 if (result == KEY_SELECTION_DONT)
 481                         return g_strdup("_DONT_ENCRYPT_");
 482                 else
 483                         return NULL;
 484         }
 485         while (keys[i]) {
 486                 gpgme_subkey_t skey = keys[i]->subkeys;
 487                 gchar *fpr = skey->fpr;
 488                 gchar *tmp = NULL;
 489                 debug_print("adding %s\n", fpr);
 490                 tmp = g_strconcat(ret?ret:"", fpr, " ", NULL);
 491                 g_free(ret);
 492                 ret = tmp;
 493                 i++;
 494         }
 495         return ret;
 496 }
 497
 498 gboolean sgpgme_setup_signers(gpgme_ctx_t ctx, PrefsAccount *account,
 499                               const gchar *from_addr)
 500 {
 501         GPGAccountConfig *config;
 502         const gchar *signer_addr = account->address;
 503
 504         gpgme_signers_clear(ctx);
 505
 506         if (from_addr)
 507                 signer_addr = from_addr;
 508         config = prefs_gpg_account_get_config(account);
 509
 510         switch(config->sign_key) {
 511         case SIGN_KEY_DEFAULT:
 512                 debug_print("using default gnupg key\n");
 513                 break;
 514         case SIGN_KEY_BY_FROM:
 515                 debug_print("using key for %s\n", signer_addr);
 516                 break;
 517         case SIGN_KEY_CUSTOM:
 518                 debug_print("using key for %s\n", config->sign_key_id);
 519                 break;
 520         }
 521
 522         if (config->sign_key != SIGN_KEY_DEFAULT) {
 523                 const gchar *keyid;
 524                 gpgme_key_t key, key2;
 525                 gpgme_error_t err;
 526
 527                 if (config->sign_key == SIGN_KEY_BY_FROM)
 528                         keyid = signer_addr;
 529                 else if (config->sign_key == SIGN_KEY_CUSTOM)
 530                         keyid = config->sign_key_id;
 531                 else
 532                         goto bail;
 533
 534                 err = gpgme_op_keylist_start(ctx, keyid, 1);
 535                 if (!err) {
 536                         do {
 537                                 err = gpgme_op_keylist_next(ctx, &key);
 538                                 if (!err && key && key->protocol == gpgme_get_protocol(ctx) &&
 539                                     !key->expired && !key->revoked && !key->disabled)
 540                                         break;
 541                                 if (!err && key && key->protocol != gpgme_get_protocol(ctx)) {
 542                                         debug_print("skipping a key (wrong protocol %d)\n", key->protocol);
 543                                         gpgme_key_release(key);
 544                                 }
 545                                 if (!err && key && (key->expired || key->revoked || key->disabled)) {
 546
 547                                         debug_print("skipping a key");
 548                                         if (key->expired)
 549                                                 debug_print(" expired");
 550                                         if (key->revoked)
 551                                                 debug_print(" revoked");
 552                                         if (key->disabled)
 553                                                 debug_print(" disabled");
 554                                         debug_print("\n");
 555                                         gpgme_key_release(key);
 556                                 }
 557                         } while (!err);
 558                 }
 559                 if (err) {
 560                         g_warning("setup_signers start: %s", gpgme_strerror(err));
 561                         privacy_set_error(_("Secret key not found (%s)"), gpgme_strerror(err));
 562                         goto bail;
 563                 }
 564
 565                 do {
 566                         err = gpgme_op_keylist_next(ctx, &key2);
 567                         if (!err && key2 && key2->protocol == gpgme_get_protocol(ctx) &&
 568                             !key2->expired && !key2->revoked && !key2->disabled)
 569                                 break;
 570                         if (!err && key2 && key2->protocol != gpgme_get_protocol(ctx)) {
 571                                 debug_print("skipping a key (wrong protocol %d)\n", key2->protocol);
 572                                 gpgme_key_release(key2);
 573                         }
 574                         if (!err && key2 && (key2->expired || key2->revoked || key2->disabled)) {
 575                                         debug_print("skipping a key");
 576                                         if (key2->expired)
 577                                                 debug_print(" expired");
 578                                         if (key2->revoked)
 579                                                 debug_print(" revoked");
 580                                         if (key2->disabled)
 581                                                 debug_print(" disabled");
 582                                         debug_print("\n");
 583                                 gpgme_key_release(key2);
 584                         }
 585                 } while (!err);
 586                 if (!err) {
 587                         gpgme_key_release(key2);
 588                         g_warning("ambiguous specification of secret key '%s'\n",
 589                                 keyid);
 590                         privacy_set_error(_("Secret key specification is ambiguous"));
 591                         goto bail;
 592                 }
 593
 594                 gpgme_op_keylist_end(ctx);
 595                 err = gpgme_signers_add(ctx, key);
 596                 debug_print("got key (proto %d (pgp %d, smime %d).\n", key->protocol,
 597                                 GPGME_PROTOCOL_OpenPGP, GPGME_PROTOCOL_CMS);
 598                 gpgme_key_release(key);
 599
 600                 if (err) {
 601                         g_warning("error adding secret key: %s\n", gpgme_strerror(err));
 602                         privacy_set_error(_("Error setting secret key: %s"), gpgme_strerror(err));
 603                         goto bail;
 604                 }
 605         }
 606
 607         prefs_gpg_account_free_config(config);
 608
 609         return TRUE;
 610 bail:
 611         prefs_gpg_account_free_config(config);
 612         return FALSE;
 613 }
 614
 615 void sgpgme_init()
 616 {
 617         gchar *ctype_locale = NULL, *messages_locale = NULL;
 618         gchar *ctype_utf8_locale = NULL, *messages_utf8_locale = NULL;
 619
 620         gpgme_engine_info_t engineInfo;
 621         if (gpgme_check_version("1.0.0")) {
 622 #ifdef LC_CTYPE
 623                 debug_print("setting gpgme CTYPE locale\n");
 624 #ifdef G_OS_WIN32
 625                 ctype_locale = g_win32_getlocale();
 626 #else
 627                 ctype_locale = g_strdup(setlocale(LC_CTYPE, NULL));
 628 #endif
 629                 debug_print("setting gpgme locale to: %s\n", ctype_locale ? ctype_locale : "NULL");
 630                 if (strchr(ctype_locale, '.'))
 631                         *(strchr(ctype_locale, '.')) = '\0';
 632                 else if (strchr(ctype_locale, '@'))
 633                         *(strchr(ctype_locale, '@')) = '\0';
 634                 ctype_utf8_locale = g_strconcat(ctype_locale, ".UTF-8", NULL);
 635
 636                 debug_print("setting gpgme locale to UTF8: %s\n", ctype_utf8_locale ? ctype_utf8_locale : "NULL");
 637                 gpgme_set_locale(NULL, LC_CTYPE, ctype_utf8_locale);
 638
 639                 debug_print("done\n");
 640                 g_free(ctype_utf8_locale);
 641                 g_free(ctype_locale);
 642 #endif
 643 #ifdef LC_MESSAGES
 644                 debug_print("setting gpgme MESSAGES locale\n");
 645 #ifdef G_OS_WIN32
 646                 messages_locale = g_win32_getlocale();
 647 #else
 648                 messages_locale = g_strdup(setlocale(LC_MESSAGES, NULL));
 649 #endif
 650                 debug_print("setting gpgme locale to: %s\n", messages_locale ? messages_locale : "NULL");
 651                 if (strchr(messages_locale, '.'))
 652                         *(strchr(messages_locale, '.')) = '\0';
 653                 else if (strchr(messages_locale, '@'))
 654                         *(strchr(messages_locale, '@')) = '\0';
 655                 messages_utf8_locale = g_strconcat(messages_locale, ".UTF-8", NULL);
 656                 debug_print("setting gpgme locale to UTF8: %s\n", messages_utf8_locale ? messages_utf8_locale : "NULL");
 657
 658                 gpgme_set_locale(NULL, LC_MESSAGES, messages_utf8_locale);
 659
 660                 debug_print("done\n");
 661                 g_free(messages_utf8_locale);
 662                 g_free(messages_locale);
 663 #endif
 664                 if (!gpgme_get_engine_info(&engineInfo)) {
 665                         while (engineInfo) {
 666                                 debug_print("GpgME Protocol: %s\n"
 667                                             "Version: %s (req %s)\n"
 668                                             "Executable: %s\n",
 669                                         gpgme_get_protocol_name(engineInfo->protocol) ? gpgme_get_protocol_name(engineInfo->protocol):"???",
 670                                         engineInfo->version ? engineInfo->version:"???",
 671                                         engineInfo->req_version ? engineInfo->req_version:"???",
 672                                         engineInfo->file_name ? engineInfo->file_name:"???");
 673                                 if (engineInfo->protocol == GPGME_PROTOCOL_OpenPGP
 674                                 &&  gpgme_engine_check_version(engineInfo->protocol) !=
 675                                         GPG_ERR_NO_ERROR) {
 676                                         if (engineInfo->file_name && !engineInfo->version) {
 677                                                 alertpanel_error(_("Gpgme protocol '%s' is unusable: "
 678                                                                    "Engine '%s' isn't installed properly."),
 679                                                                    gpgme_get_protocol_name(engineInfo->protocol),
 680                                                                    engineInfo->file_name);
 681                                         } else if (engineInfo->file_name && engineInfo->version
 682                                           && engineInfo->req_version) {
 683                                                 alertpanel_error(_("Gpgme protocol '%s' is unusable: "
 684                                                                    "Engine '%s' version %s is installed, "
 685                                                                    "but version %s is required.\n"),
 686                                                                    gpgme_get_protocol_name(engineInfo->protocol),
 687                                                                    engineInfo->file_name,
 688                                                                    engineInfo->version,
 689                                                                    engineInfo->req_version);
 690                                         } else {
 691                                                 alertpanel_error(_("Gpgme protocol '%s' is unusable "
 692                                                                    "(unknown problem)"),
 693                                                                    gpgme_get_protocol_name(engineInfo->protocol));
 694                                         }
 695                                 }
 696                                 engineInfo = engineInfo->next;
 697                         }
 698                 }
 699         } else {
 700                 sgpgme_disable_all();
 701
 702                 if (prefs_gpg_get_config()->gpg_warning) {
 703                         AlertValue val;
 704
 705                         val = alertpanel_full
 706                                 (_("Warning"),
 707                                  _("GnuPG is not installed properly, or needs "
 708                                  "to be upgraded.\n"
 709                                  "OpenPGP support disabled."),
 710                                  GTK_STOCK_CLOSE, NULL, NULL, TRUE, NULL,
 711                                  ALERT_WARNING, G_ALERTDEFAULT);
 712                         if (val & G_ALERTDISABLE)
 713                                 prefs_gpg_get_config()->gpg_warning = FALSE;
 714                 }
 715         }
 716 }
 717
 718 void sgpgme_done()
 719 {
 720         gpgmegtk_free_passphrase();
 721 }
 722
 723 void sgpgme_create_secret_key(PrefsAccount *account, gboolean ask_create)
 724 {
 725         AlertValue val = G_ALERTDEFAULT;
 726         gchar *key_parms = NULL;
 727         gchar *name = NULL;
 728         gchar *email = NULL;
 729         gchar *passphrase = NULL, *passphrase_second = NULL;
 730         gint prev_bad = 0;
 731         gchar *tmp = NULL;
 732         gpgme_error_t err = 0;
 733         gpgme_ctx_t ctx;
 734         GtkWidget *window = NULL;
 735         gpgme_genkey_result_t key;
 736
 737         if (account == NULL)
 738                 account = account_get_default();
 739
 740         if (account->address == NULL) {
 741                 alertpanel_error(_("You have to save the account's information with \"OK\" "
 742                                    "before being able to generate a key pair.\n"));
 743                 return;
 744         }
 745         if (ask_create) {
 746                 val = alertpanel(_("No PGP key found"),
 747                                 _("Claws Mail did not find a secret PGP key, "
 748                                   "which means that you won't be able to sign "
 749                                   "emails or receive encrypted emails.\n"
 750                                   "Do you want to create a new key pair now?"),
 751                                   GTK_STOCK_NO, "+" GTK_STOCK_YES, NULL);
 752                 if (val == G_ALERTDEFAULT) {
 753                         prefs_gpg_get_config()->gpg_ask_create_key = FALSE;
 754                         prefs_gpg_save_config();
 755                         return;
 756                 }
 757         }
 758
 759         if (account->name) {
 760                 name = g_strdup(account->name);
 761         } else {
 762                 name = g_strdup(account->address);
 763         }
 764         email = g_strdup(account->address);
 765         tmp = g_strdup_printf("%s <%s>", account->name?account->name:account->address, account->address);
 766 again:
 767         passphrase = passphrase_mbox(tmp, NULL, prev_bad, 1);
 768         if (passphrase == NULL) {
 769                 g_free(tmp);
 770                 g_free(email);
 771                 g_free(name);
 772                 return;
 773         }
 774         passphrase_second = passphrase_mbox(tmp, NULL, 0, 2);
 775         if (passphrase_second == NULL) {
 776                 g_free(tmp);
 777                 g_free(email);
 778                 g_free(passphrase);
 779                 g_free(name);
 780                 return;
 781         }
 782         if (strcmp(passphrase, passphrase_second)) {
 783                 g_free(passphrase);
 784                 g_free(passphrase_second);
 785                 prev_bad = 1;
 786                 goto again;
 787         }
 788
 789         key_parms = g_strdup_printf("<GnupgKeyParms format=\"internal\">\n"
 790                                         "Key-Type: DSA\n"
 791                                         "Key-Length: 1024\n"
 792                                         "Subkey-Type: ELG-E\n"
 793                                         "Subkey-Length: 2048\n"
 794                                         "Name-Real: %s\n"
 795                                         "Name-Email: %s\n"
 796                                         "Expire-Date: 0\n"
 797                                         "%s%s%s"
 798                                         "</GnupgKeyParms>\n",
 799                                         name, email,
 800                                         strlen(passphrase)?"Passphrase: ":"",
 801                                         passphrase,
 802                                         strlen(passphrase)?"\n":"");
 803 #ifndef G_PLATFORM_WIN32
 804         if (mlock(passphrase, strlen(passphrase)) == -1)
 805                 debug_print("couldn't lock passphrase\n");
 806         if (mlock(passphrase_second, strlen(passphrase_second)) == -1)
 807                 debug_print("couldn't lock passphrase2\n");
 808 #endif
 809         g_free(tmp);
 810         g_free(email);
 811         g_free(name);
 812         g_free(passphrase_second);
 813         g_free(passphrase);
 814
 815         err = gpgme_new (&ctx);
 816         if (err) {
 817                 alertpanel_error(_("Couldn't generate a new key pair: %s"),
 818                                  gpgme_strerror(err));
 819                 g_free(key_parms);
 820                 return;
 821         }
 822
 823
 824         window = label_window_create(_("Generating your new key pair... Please move the mouse "
 825                               "around to help generate entropy..."));
 826
 827         err = gpgme_op_genkey(ctx, key_parms, NULL, NULL);
 828         g_free(key_parms);
 829
 830         label_window_destroy(window);
 831
 832         if (err) {
 833                 alertpanel_error(_("Couldn't generate a new key pair: %s"), gpgme_strerror(err));
 834                 gpgme_release(ctx);
 835                 return;
 836         }
 837         key = gpgme_op_genkey_result(ctx);
 838         if (key == NULL) {
 839                 alertpanel_error(_("Couldn't generate a new key pair: unknown error"));
 840                 gpgme_release(ctx);
 841                 return;
 842         } else {
 843                 gchar *buf = g_strdup_printf(_("Your new key pair has been generated. "
 844                                     "Its fingerprint is:\n%s\n\nDo you want to export it "
 845                                     "to a keyserver?"),
 846                                     key->fpr ? key->fpr:"null");
 847                 AlertValue val = alertpanel(_("Key generated"), buf,
 848                                   GTK_STOCK_NO, "+" GTK_STOCK_YES, NULL);
 849                 g_free(buf);
 850                 if (val == G_ALERTALTERNATE) {
 851 #ifndef G_OS_WIN32
 852                         gchar *cmd = g_strdup_printf("gpg --no-tty --send-keys %s", key->fpr);
 853                         int res = 0;
 854                         pid_t pid = 0;
 855                         pid = fork();
 856                         if (pid == -1) {
 857                                 res = -1;
 858                         } else if (pid == 0) {
 859                                 /* son */
 860                                 res = system(cmd);
 861                                 res = WEXITSTATUS(res);
 862                                 _exit(res);
 863                         } else {
 864                                 int status = 0;
 865                                 time_t start_wait = time(NULL);
 866                                 res = -1;
 867                                 do {
 868                                         if (waitpid(pid, &status, WNOHANG) == 0 || !WIFEXITED(status)) {
 869                                                 usleep(200000);
 870                                         } else {
 871                                                 res = WEXITSTATUS(status);
 872                                                 break;
 873                                         }
 874                                         if (time(NULL) - start_wait > 5) {
 875                                                 debug_print("SIGTERM'ing gpg\n");
 876                                                 kill(pid, SIGTERM);
 877                                         }
 878                                         if (time(NULL) - start_wait > 6) {
 879                                                 debug_print("SIGKILL'ing gpg\n");
 880                                                 kill(pid, SIGKILL);
 881                                                 break;
 882                                         }
 883                                 } while(1);
 884                         }
 885                         if (res == 0) {
 886                                 alertpanel_notice(_("Key exported."));
 887                         } else {
 888                                 alertpanel_error(_("Couldn't export key."));
 889                         }
 890                         g_free(cmd);
 891 #else
 892                         alertpanel_error(_("Key export isn't implemented in Windows."));
 893 #endif
 894                 }
 895         }
 896         prefs_gpg_get_config()->gpg_ask_create_key = FALSE;
 897         prefs_gpg_save_config();
 898         gpgme_release(ctx);
 899 }
 900
 901 gboolean sgpgme_has_secret_key(void)
 902 {
 903         gpgme_error_t err = 0;
 904         gpgme_ctx_t ctx;
 905         gpgme_key_t key;
 906
 907         err = gpgme_new (&ctx);
 908         if (err) {
 909                 debug_print("err : %s\n", gpgme_strerror(err));
 910                 return TRUE;
 911         }
 912 check_again:
 913         err = gpgme_op_keylist_start(ctx, NULL, TRUE);
 914         if (!err)
 915                 err = gpgme_op_keylist_next(ctx, &key);
 916         gpgme_op_keylist_end(ctx);
 917         if (gpg_err_code(err) == GPG_ERR_EOF) {
 918                 if (gpgme_get_protocol(ctx) != GPGME_PROTOCOL_CMS) {
 919                         gpgme_set_protocol(ctx, GPGME_PROTOCOL_CMS);
 920                         goto check_again;
 921                 }
 922                 gpgme_release(ctx);
 923                 return FALSE;
 924         } else {
 925                 gpgme_release(ctx);
 926                 return TRUE;
 927         }
 928 }
 929
 930 void sgpgme_check_create_key(void)
 931 {
 932         if (prefs_gpg_get_config()->gpg_ask_create_key &&
 933             !sgpgme_has_secret_key()) {
 934                 sgpgme_create_secret_key(NULL, TRUE);
 935         } else {
 936                 prefs_gpg_get_config()->gpg_ask_create_key = FALSE;
 937                 prefs_gpg_save_config();
 938         }
 939 }
 940
 941 void *sgpgme_data_release_and_get_mem(gpgme_data_t data, size_t *len)
 942 {
 943         char buf[BUFSIZ];
 944         void *result = NULL;
 945         ssize_t r = 0;
 946         size_t w = 0;
 947
 948         if (data == NULL)
 949                 return NULL;
 950         if (len == NULL)
 951                 return NULL;
 952
 953         /* I know it's deprecated, but we don't compile with _LARGEFILE */
 954         cm_gpgme_data_rewind(data);
 955         while ((r = gpgme_data_read(data, buf, BUFSIZ)) > 0) {
 956                 result = realloc(result, r + w);
 957                 memcpy(result+w, buf, r);
 958                 w += r;
 959         }
 960
 961         *len = w;
 962
 963         gpgme_data_release(data);
 964         if (r < 0) {
 965                 free(result);
 966                 *len = 0;
 967                 return NULL;
 968         }
 969         return result;
 970 }
 971
 972 gpgme_error_t cm_gpgme_data_rewind(gpgme_data_t dh)
 973 {
 974 #if defined(_FILE_OFFSET_BITS) && _FILE_OFFSET_BITS == 64
 975         if (gpgme_data_seek(dh, (off_t)0, SEEK_SET) == -1)
 976                 return gpg_error_from_errno(errno);
 977         else
 978                 return 0;
 979 #else
 980         return gpgme_data_rewind(dh);
 981 #endif
 982 }
 983
 984 #endif /* USE_GPGME */