src/plugins/pgpcore/sgpgme.c

   1 /*
   2  * Claws Mail -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2009 the Claws Mail team
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 3 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  17  *
  18  */
  19
  20 #ifdef HAVE_CONFIG_H
  21 #  include "config.h"
  22 #endif
  23
  24 #ifdef USE_GPGME
  25
  26 #include <time.h>
  27 #include <gtk/gtk.h>
  28 #include <gpgme.h>
  29 #include <glib.h>
  30 #include <glib/gi18n.h>
  31 #include <stdio.h>
  32 #include <string.h>
  33 #include <stdlib.h>
  34 #include <errno.h>
  35 #include <sys/types.h>
  36 #ifndef G_OS_WIN32
  37 #  include <sys/wait.h>
  38 #endif
  39 #if (defined(__DragonFly__) || defined(SOLARIS) || defined (__NetBSD__) || defined (__FreeBSD__) || defined (__OpenBSD__))
  40 #  include <sys/signal.h>
  41 #endif
  42 #ifndef G_OS_WIN32
  43 #include <sys/mman.h>
  44 #endif
  45 #if HAVE_LOCALE_H
  46 #  include <locale.h>
  47 #endif
  48
  49 #include "sgpgme.h"
  50 #include "privacy.h"
  51 #include "prefs_common.h"
  52 #include "utils.h"
  53 #include "alertpanel.h"
  54 #include "passphrase.h"
  55 #include "prefs_gpg.h"
  56 #include "account.h"
  57 #include "select-keys.h"
  58
  59 static void sgpgme_disable_all(void)
  60 {
  61     /* FIXME: set a flag, so that we don't bother the user with failed
  62      * gpgme messages */
  63 }
  64
  65 gpgme_verify_result_t sgpgme_verify_signature(gpgme_ctx_t ctx, gpgme_data_t sig,
  66                                         gpgme_data_t plain, gpgme_data_t dummy)
  67 {
  68         gpgme_verify_result_t status = NULL;
  69         gpgme_error_t err;
  70
  71         if ((err = gpgme_op_verify(ctx, sig, plain, dummy)) != GPG_ERR_NO_ERROR) {
  72                 debug_print("op_verify err %s\n", gpgme_strerror(err));
  73                 privacy_set_error("%s", gpgme_strerror(err));
  74                 return GINT_TO_POINTER(-GPG_ERR_SYSTEM_ERROR);
  75         }
  76         status = gpgme_op_verify_result(ctx);
  77         if (status && status->signatures == NULL) {
  78                 debug_print("no signature found\n");
  79                 privacy_set_error(_("No signature found"));
  80                 return GINT_TO_POINTER(-GPG_ERR_SYSTEM_ERROR);
  81         }
  82         return status;
  83 }
  84
  85 SignatureStatus sgpgme_sigstat_gpgme_to_privacy(gpgme_ctx_t ctx, gpgme_verify_result_t status)
  86 {
  87         unsigned long validity = 0;
  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         validity = sig->validity;
 106
 107         debug_print("err code %d\n", gpg_err_code(sig->status));
 108         switch (gpg_err_code(sig->status)) {
 109         case GPG_ERR_NO_ERROR:
 110                 switch (gpg_err_code(sig->validity)) {
 111                 case GPGME_VALIDITY_NEVER:
 112                         return SIGNATURE_INVALID;
 113                 case GPGME_VALIDITY_UNKNOWN:
 114                 case GPGME_VALIDITY_UNDEFINED:
 115                 case GPGME_VALIDITY_MARGINAL:
 116                 case GPGME_VALIDITY_FULL:
 117                 case GPGME_VALIDITY_ULTIMATE:
 118                         return SIGNATURE_OK;
 119                 default:
 120                         return SIGNATURE_CHECK_FAILED;
 121                 }
 122         case GPG_ERR_SIG_EXPIRED:
 123         case GPG_ERR_CERT_REVOKED:
 124                 return SIGNATURE_WARN;
 125         case GPG_ERR_KEY_EXPIRED:
 126                 return SIGNATURE_KEY_EXPIRED;
 127         case GPG_ERR_BAD_SIGNATURE:
 128                 return SIGNATURE_INVALID;
 129         case GPG_ERR_NO_PUBKEY:
 130                 return SIGNATURE_CHECK_FAILED;
 131         default:
 132                 return SIGNATURE_CHECK_FAILED;
 133         }
 134         return SIGNATURE_CHECK_FAILED;
 135 }
 136
 137 static const gchar *get_validity_str(unsigned long validity)
 138 {
 139         switch (gpg_err_code(validity)) {
 140         case GPGME_VALIDITY_UNKNOWN:
 141                 return _("Unknown");
 142         case GPGME_VALIDITY_UNDEFINED:
 143                 return _("Undefined");
 144         case GPGME_VALIDITY_NEVER:
 145                 return _("Never");
 146         case GPGME_VALIDITY_MARGINAL:
 147                 return _("Marginal");
 148         case GPGME_VALIDITY_FULL:
 149                 return _("Full");
 150         case GPGME_VALIDITY_ULTIMATE:
 151                 return _("Ultimate");
 152         default:
 153                 return _("Error");
 154         }
 155 }
 156
 157 static gchar *extract_name(const char *uid)
 158 {
 159         if (uid == NULL)
 160                 return NULL;
 161         if (!strncmp(uid, "CN=", 3)) {
 162                 gchar *result = g_strdup(uid+3);
 163                 if (strstr(result, ","))
 164                         *(strstr(result, ",")) = '\0';
 165                 return result;
 166         } else if (strstr(uid, ",CN=")) {
 167                 gchar *result = g_strdup(strstr(uid, ",CN=")+4);
 168                 if (strstr(result, ","))
 169                         *(strstr(result, ",")) = '\0';
 170                 return result;
 171         } else {
 172                 return g_strdup(uid);
 173         }
 174 }
 175 gchar *sgpgme_sigstat_info_short(gpgme_ctx_t ctx, gpgme_verify_result_t status)
 176 {
 177         gpgme_signature_t sig = NULL;
 178         gchar *uname = NULL;
 179         gpgme_key_t key;
 180         gchar *result = NULL;
 181         gpgme_error_t err = 0;
 182         static gboolean warned = FALSE;
 183
 184         if (GPOINTER_TO_INT(status) == -GPG_ERR_SYSTEM_ERROR) {
 185                 return g_strdup_printf(_("The signature can't be checked - %s"), privacy_get_error());
 186         }
 187
 188         if (status == NULL) {
 189                 return g_strdup(_("The signature has not been checked."));
 190         }
 191         sig = status->signatures;
 192         if (sig == NULL) {
 193                 return g_strdup(_("The signature has not been checked."));
 194         }
 195
 196         err = gpgme_get_key(ctx, sig->fpr, &key, 0);
 197         if (gpg_err_code(err) == GPG_ERR_NO_AGENT) {
 198                 if (!warned)
 199                         alertpanel_error(_("PGP Core: Can't get key - no gpg-agent running."));
 200                 else
 201                         g_warning(_("PGP Core: Can't get key - no gpg-agent running."));
 202                 warned = TRUE;
 203         } else if (gpg_err_code(err) != GPG_ERR_NO_ERROR && gpg_err_code(err) != GPG_ERR_EOF) {
 204                 return g_strdup_printf(_("The signature can't be checked - %s"),
 205                         gpgme_strerror(err));
 206         }
 207         if (key)
 208                 uname = extract_name(key->uids->uid);
 209         else
 210                 uname = g_strdup("<?>");
 211         switch (gpg_err_code(sig->status)) {
 212         case GPG_ERR_NO_ERROR:
 213                 switch (gpg_err_code(sig->validity)) {
 214                 case GPGME_VALIDITY_MARGINAL:
 215                 case GPGME_VALIDITY_FULL:
 216                 case GPGME_VALIDITY_ULTIMATE:
 217                         result = g_strdup_printf(_("Good signature from %s."), uname);
 218                         break;
 219                 case GPGME_VALIDITY_UNKNOWN:
 220                 case GPGME_VALIDITY_UNDEFINED:
 221                 case GPGME_VALIDITY_NEVER:
 222                 default:
 223                         result = g_strdup_printf(_("Good signature (untrusted) from %s."), uname);
 224                         break;
 225                 }
 226                 break;
 227         case GPG_ERR_SIG_EXPIRED:
 228                 result = g_strdup_printf(_("Expired signature from %s."), uname);
 229                 break;
 230         case GPG_ERR_KEY_EXPIRED:
 231                 result = g_strdup_printf(_("Expired key from %s."), uname);
 232                 break;
 233         case GPG_ERR_BAD_SIGNATURE:
 234                 result = g_strdup_printf(_("Bad signature from %s."), uname);
 235                 break;
 236         case GPG_ERR_NO_PUBKEY: {
 237                 gchar *id = g_strdup(sig->fpr + strlen(sig->fpr)-8);
 238                 result = g_strdup_printf(_("Key 0x%s not available to verify this signature."), id);
 239                 g_free(id);
 240                 break;
 241                 }
 242         default:
 243                 result = g_strdup(_("The signature has not been checked."));
 244                 break;
 245         }
 246         if (result == NULL)
 247                 result = g_strdup(_("Error"));
 248         g_free(uname);
 249         return result;
 250 }
 251
 252 gchar *sgpgme_sigstat_info_full(gpgme_ctx_t ctx, gpgme_verify_result_t status)
 253 {
 254         gint i = 0;
 255         gchar *ret;
 256         GString *siginfo;
 257         gpgme_signature_t sig = NULL;
 258
 259         siginfo = g_string_sized_new(64);
 260         if (status == NULL) {
 261                 g_string_append_printf(siginfo,
 262                         _("Error checking signature: no status\n"));
 263                 goto bail;
 264          }
 265
 266         sig = status->signatures;
 267
 268         while (sig) {
 269                 gpgme_user_id_t user = NULL;
 270                 gpgme_key_t key;
 271                 gpgme_error_t err;
 272                 const gchar *keytype, *keyid, *uid;
 273
 274                 err = gpgme_get_key(ctx, sig->fpr, &key, 0);
 275
 276                 if (err != GPG_ERR_NO_ERROR) {
 277                         key = NULL;
 278                         g_string_append_printf(siginfo,
 279                                 _("Error checking signature: %s\n"),
 280                                 gpgme_strerror(err));
 281                         goto bail;
 282                 }
 283                 if (key) {
 284                         user = key->uids;
 285                         keytype = gpgme_pubkey_algo_name(
 286                                         key->subkeys->pubkey_algo);
 287                         keyid = key->subkeys->keyid;
 288                         uid = user->uid;
 289                 } else {
 290                         keytype = "?";
 291                         keyid = "?";
 292                         uid = "?";
 293                 }
 294                 g_string_append_printf(siginfo,
 295                         _("Signature made using %s key ID %s\n"),
 296                         keytype, keyid);
 297
 298                 switch (gpg_err_code(sig->status)) {
 299                 case GPG_ERR_NO_ERROR:
 300                 case GPG_ERR_KEY_EXPIRED:
 301                         g_string_append_printf(siginfo,
 302                                 _("Good signature from uid \"%s\" (Validity: %s)\n"),
 303                                 uid, get_validity_str(user?user->validity:GPGME_VALIDITY_UNKNOWN));
 304                         break;
 305                 case GPG_ERR_SIG_EXPIRED:
 306                         g_string_append_printf(siginfo,
 307                                 _("Expired signature from uid \"%s\" (Validity: %s)\n"),
 308                                 uid, get_validity_str(user?user->validity:GPGME_VALIDITY_UNKNOWN));
 309                         break;
 310                 case GPG_ERR_BAD_SIGNATURE:
 311                         g_string_append_printf(siginfo,
 312                                 _("BAD signature from \"%s\"\n"),
 313                                 uid);
 314                         break;
 315                 default:
 316                         break;
 317                 }
 318                 if (sig->status != GPG_ERR_BAD_SIGNATURE) {
 319                         gint j = 1;
 320                         user = user ? user->next : NULL;
 321                         while (user != NULL) {
 322                                 g_string_append_printf(siginfo,
 323                                         _("                    uid \"%s\" (Validity: %s)\n"),
 324                                         user->uid,
 325                                         get_validity_str(user->validity));
 326                                 j++;
 327                                 user = user->next;
 328                         }
 329                         g_string_append_printf(siginfo,
 330                                 _("Primary key fingerprint:"));
 331                         const char* primary_fpr = NULL;
 332                         if (key && key->subkeys && key->subkeys->fpr)
 333                                 primary_fpr = key->subkeys->fpr;
 334                         else
 335                                 g_string_append(siginfo, " ?");
 336                         int idx; /* now pretty-print the fingerprint */
 337                         for (idx=0; primary_fpr && *primary_fpr!='\0'; idx++, primary_fpr++) {
 338                                 if (idx%4==0)
 339                                         g_string_append_c(siginfo, ' ');
 340                                 if (idx%20==0)
 341                                         g_string_append_c(siginfo, ' ');
 342                                 g_string_append_c(siginfo, (gchar)*primary_fpr);
 343                         }
 344                         g_string_append_c(siginfo, '\n');
 345 #ifdef HAVE_GPGME_PKA_TRUST
 346                         if (sig->pka_trust == 1 && sig->pka_address) {
 347                                 g_string_append_printf(siginfo,
 348                                    _("WARNING: Signer's address \"%s\" "
 349                                       "does not match DNS entry\n"),
 350                                    sig->pka_address);
 351                         }
 352                         else if (sig->pka_trust == 2 && sig->pka_address) {
 353                                 g_string_append_printf(siginfo,
 354                                    _("Verified signer's address is \"%s\"\n"),
 355                                    sig->pka_address);
 356                                 /* FIXME: Compare the address to the
 357                                  * From: address.  */
 358                         }
 359 #endif /*HAVE_GPGME_PKA_TRUST*/
 360                 }
 361
 362                 g_string_append(siginfo, "\n");
 363                 i++;
 364                 sig = sig->next;
 365         }
 366 bail:
 367         ret = siginfo->str;
 368         g_string_free(siginfo, FALSE);
 369         return ret;
 370 }
 371
 372 gpgme_data_t sgpgme_data_from_mimeinfo(MimeInfo *mimeinfo)
 373 {
 374         gpgme_data_t data = NULL;
 375         gpgme_error_t err;
 376         FILE *fp = g_fopen(mimeinfo->data.filename, "rb");
 377         gchar *tmp_file = NULL;
 378
 379         if (!fp)
 380                 return NULL;
 381
 382         tmp_file = get_tmp_file();
 383         copy_file_part(fp, mimeinfo->offset, mimeinfo->length, tmp_file);
 384         fclose(fp);
 385         fp = NULL;
 386         debug_print("tmp file %s\n", tmp_file);
 387
 388         err = gpgme_data_new_from_file(&data, tmp_file, 1);
 389         claws_unlink(tmp_file);
 390         g_free(tmp_file);
 391
 392         debug_print("data %p (%d %d)\n", (void *)&data, mimeinfo->offset, mimeinfo->length);
 393         if (err) {
 394                 debug_print ("gpgme_data_new_from_file failed: %s\n",
 395                              gpgme_strerror (err));
 396                 privacy_set_error(_("Couldn't get data from message, %s"), gpgme_strerror(err));
 397                 return NULL;
 398         }
 399         return data;
 400 }
 401
 402 gpgme_data_t sgpgme_decrypt_verify(gpgme_data_t cipher, gpgme_verify_result_t *status, gpgme_ctx_t ctx)
 403 {
 404         struct passphrase_cb_info_s info;
 405         gpgme_data_t plain;
 406         gpgme_error_t err;
 407
 408         memset (&info, 0, sizeof info);
 409
 410         if ((err = gpgme_data_new(&plain)) != GPG_ERR_NO_ERROR) {
 411                 gpgme_release(ctx);
 412                 privacy_set_error(_("Couldn't initialize data, %s"), gpgme_strerror(err));
 413                 return NULL;
 414         }
 415
 416         if (gpgme_get_protocol(ctx) == GPGME_PROTOCOL_OpenPGP) {
 417                 prefs_gpg_enable_agent(prefs_gpg_get_config()->use_gpg_agent);
 418                 if (!getenv("GPG_AGENT_INFO") || !prefs_gpg_get_config()->use_gpg_agent) {
 419                         info.c = ctx;
 420                         gpgme_set_passphrase_cb (ctx, gpgmegtk_passphrase_cb, &info);
 421                 }
 422         } else {
 423                 prefs_gpg_enable_agent(TRUE);
 424                 info.c = ctx;
 425                 gpgme_set_passphrase_cb (ctx, NULL, &info);
 426         }
 427
 428
 429         if (gpgme_get_protocol(ctx) == GPGME_PROTOCOL_OpenPGP) {
 430                 err = gpgme_op_decrypt_verify(ctx, cipher, plain);
 431                 if (err != GPG_ERR_NO_ERROR) {
 432                         debug_print("can't decrypt (%s)\n", gpgme_strerror(err));
 433                         privacy_set_error("%s", gpgme_strerror(err));
 434                         gpgmegtk_free_passphrase();
 435                         gpgme_data_release(plain);
 436                         return NULL;
 437                 }
 438
 439                 err = cm_gpgme_data_rewind(plain);
 440                 if (err) {
 441                         debug_print("can't seek (%d %d %s)\n", err, errno, strerror(errno));
 442                 }
 443
 444                 debug_print("decrypted.\n");
 445                 *status = gpgme_op_verify_result (ctx);
 446         } else {
 447                 err = gpgme_op_decrypt(ctx, cipher, plain);
 448                 if (err != GPG_ERR_NO_ERROR) {
 449                         debug_print("can't decrypt (%s)\n", gpgme_strerror(err));
 450                         privacy_set_error("%s", gpgme_strerror(err));
 451                         gpgmegtk_free_passphrase();
 452                         gpgme_data_release(plain);
 453                         return NULL;
 454                 }
 455
 456                 err = cm_gpgme_data_rewind(plain);
 457                 if (err) {
 458                         debug_print("can't seek (%d %d %s)\n", err, errno, strerror(errno));
 459                 }
 460
 461                 debug_print("decrypted.\n");
 462                 *status = gpgme_op_verify_result (ctx);
 463         }
 464         return plain;
 465 }
 466
 467 gchar *sgpgme_get_encrypt_data(GSList *recp_names, gpgme_protocol_t proto)
 468 {
 469         SelectionResult result = KEY_SELECTION_CANCEL;
 470         gpgme_key_t *keys = gpgmegtk_recipient_selection(recp_names, &result,
 471                                 proto);
 472         gchar *ret = NULL;
 473         int i = 0;
 474
 475         if (!keys) {
 476                 if (result == KEY_SELECTION_DONT)
 477                         return g_strdup("_DONT_ENCRYPT_");
 478                 else
 479                         return NULL;
 480         }
 481         while (keys[i]) {
 482                 gpgme_subkey_t skey = keys[i]->subkeys;
 483                 gchar *fpr = skey->fpr;
 484                 gchar *tmp = NULL;
 485                 debug_print("adding %s\n", fpr);
 486                 tmp = g_strconcat(ret?ret:"", fpr, " ", NULL);
 487                 g_free(ret);
 488                 ret = tmp;
 489                 i++;
 490         }
 491         return ret;
 492 }
 493
 494 gboolean sgpgme_setup_signers(gpgme_ctx_t ctx, PrefsAccount *account,
 495                               const gchar *from_addr)
 496 {
 497         GPGAccountConfig *config;
 498         const gchar *signer_addr = account->address;
 499
 500         gpgme_signers_clear(ctx);
 501
 502         if (from_addr)
 503                 signer_addr = from_addr;
 504         config = prefs_gpg_account_get_config(account);
 505
 506         switch(config->sign_key) {
 507         case SIGN_KEY_DEFAULT:
 508                 debug_print("using default gnupg key\n");
 509                 break;
 510         case SIGN_KEY_BY_FROM:
 511                 debug_print("using key for %s\n", signer_addr);
 512                 break;
 513         case SIGN_KEY_CUSTOM:
 514                 debug_print("using key for %s\n", config->sign_key_id);
 515                 break;
 516         }
 517
 518         if (config->sign_key != SIGN_KEY_DEFAULT) {
 519                 const gchar *keyid;
 520                 gpgme_key_t key, key2;
 521                 gpgme_error_t err;
 522
 523                 if (config->sign_key == SIGN_KEY_BY_FROM)
 524                         keyid = signer_addr;
 525                 else if (config->sign_key == SIGN_KEY_CUSTOM)
 526                         keyid = config->sign_key_id;
 527                 else
 528                         goto bail;
 529
 530                 err = gpgme_op_keylist_start(ctx, keyid, 1);
 531                 if (!err) {
 532                         do {
 533                                 err = gpgme_op_keylist_next(ctx, &key);
 534                                 if (!err && key && key->protocol == gpgme_get_protocol(ctx) &&
 535                                     !key->expired && !key->revoked && !key->disabled)
 536                                         break;
 537                                 if (!err && key && key->protocol != gpgme_get_protocol(ctx)) {
 538                                         debug_print("skipping a key (wrong protocol %d)\n", key->protocol);
 539                                         gpgme_key_release(key);
 540                                 }
 541                                 if (!err && key && (key->expired || key->revoked || key->disabled)) {
 542
 543                                         debug_print("skipping a key");
 544                                         if (key->expired)
 545                                                 debug_print(" expired");
 546                                         if (key->revoked)
 547                                                 debug_print(" revoked");
 548                                         if (key->disabled)
 549                                                 debug_print(" disabled");
 550                                         debug_print("\n");
 551                                         gpgme_key_release(key);
 552                                 }
 553                         } while (!err);
 554                 }
 555                 if (err) {
 556                         g_warning("setup_signers start: %s", gpgme_strerror(err));
 557                         privacy_set_error(_("Secret key not found (%s)"), gpgme_strerror(err));
 558                         goto bail;
 559                 }
 560
 561                 do {
 562                         err = gpgme_op_keylist_next(ctx, &key2);
 563                         if (!err && key2 && key2->protocol == gpgme_get_protocol(ctx) &&
 564                             !key2->expired && !key2->revoked && !key2->disabled)
 565                                 break;
 566                         if (!err && key2 && key2->protocol != gpgme_get_protocol(ctx)) {
 567                                 debug_print("skipping a key (wrong protocol %d)\n", key2->protocol);
 568                                 gpgme_key_release(key2);
 569                         }
 570                         if (!err && key2 && (key2->expired || key2->revoked || key2->disabled)) {
 571                                         debug_print("skipping a key");
 572                                         if (key2->expired)
 573                                                 debug_print(" expired");
 574                                         if (key2->revoked)
 575                                                 debug_print(" revoked");
 576                                         if (key2->disabled)
 577                                                 debug_print(" disabled");
 578                                         debug_print("\n");
 579                                 gpgme_key_release(key2);
 580                         }
 581                 } while (!err);
 582                 if (!err) {
 583                         gpgme_key_release(key2);
 584                         g_warning("ambiguous specification of secret key '%s'\n",
 585                                 keyid);
 586                         privacy_set_error(_("Secret key specification is ambiguous"));
 587                         goto bail;
 588                 }
 589
 590                 gpgme_op_keylist_end(ctx);
 591                 err = gpgme_signers_add(ctx, key);
 592                 debug_print("got key (proto %d (pgp %d, smime %d).\n", key->protocol,
 593                                 GPGME_PROTOCOL_OpenPGP, GPGME_PROTOCOL_CMS);
 594                 gpgme_key_release(key);
 595
 596                 if (err) {
 597                         g_warning("error adding secret key: %s\n", gpgme_strerror(err));
 598                         privacy_set_error(_("Error setting secret key: %s"), gpgme_strerror(err));
 599                         goto bail;
 600                 }
 601         }
 602
 603         prefs_gpg_account_free_config(config);
 604
 605         return TRUE;
 606 bail:
 607         prefs_gpg_account_free_config(config);
 608         return FALSE;
 609 }
 610
 611 void sgpgme_init()
 612 {
 613         gpgme_engine_info_t engineInfo;
 614         if (gpgme_check_version("1.0.0")) {
 615 #ifdef LC_CTYPE
 616                 gpgme_set_locale(NULL, LC_CTYPE, setlocale(LC_CTYPE, NULL));
 617 #endif
 618 #ifdef LC_MESSAGES
 619                 gpgme_set_locale(NULL, LC_MESSAGES, setlocale(LC_MESSAGES, NULL));
 620 #endif
 621                 if (!gpgme_get_engine_info(&engineInfo)) {
 622                         while (engineInfo) {
 623 #ifndef G_OS_WIN32
 624                                 debug_print("GpgME Protocol: %s\n"
 625                                             "Version: %s (req %s)\n"
 626                                             "Executable: %s\n",
 627                                         gpgme_get_protocol_name(engineInfo->protocol) ? gpgme_get_protocol_name(engineInfo->protocol):"???",
 628                                         engineInfo->version ? engineInfo->version:"???",
 629                                         engineInfo->req_version ? engineInfo->req_version:"???",
 630                                         engineInfo->file_name ? engineInfo->file_name:"???");
 631 #endif
 632                                 if (engineInfo->protocol == GPGME_PROTOCOL_OpenPGP
 633                                 &&  gpgme_engine_check_version(engineInfo->protocol) !=
 634                                         GPG_ERR_NO_ERROR) {
 635                                         if (engineInfo->file_name && !engineInfo->version) {
 636                                                 alertpanel_error(_("Gpgme protocol '%s' is unusable: "
 637                                                                    "Engine '%s' isn't installed properly."),
 638                                                                    gpgme_get_protocol_name(engineInfo->protocol),
 639                                                                    engineInfo->file_name);
 640                                         } else if (engineInfo->file_name && engineInfo->version
 641                                           && engineInfo->req_version) {
 642                                                 alertpanel_error(_("Gpgme protocol '%s' is unusable: "
 643                                                                    "Engine '%s' version %s is installed, "
 644                                                                    "but version %s is required.\n"),
 645                                                                    gpgme_get_protocol_name(engineInfo->protocol),
 646                                                                    engineInfo->file_name,
 647                                                                    engineInfo->version,
 648                                                                    engineInfo->req_version);
 649                                         } else {
 650                                                 alertpanel_error(_("Gpgme protocol '%s' is unusable "
 651                                                                    "(unknown problem)"),
 652                                                                    gpgme_get_protocol_name(engineInfo->protocol));
 653                                         }
 654                                 }
 655                                 engineInfo = engineInfo->next;
 656                         }
 657                 }
 658         } else {
 659                 sgpgme_disable_all();
 660
 661                 if (prefs_gpg_get_config()->gpg_warning) {
 662                         AlertValue val;
 663
 664                         val = alertpanel_full
 665                                 (_("Warning"),
 666                                  _("GnuPG is not installed properly, or needs "
 667                                  "to be upgraded.\n"
 668                                  "OpenPGP support disabled."),
 669                                  GTK_STOCK_CLOSE, NULL, NULL, TRUE, NULL,
 670                                  ALERT_WARNING, G_ALERTDEFAULT);
 671                         if (val & G_ALERTDISABLE)
 672                                 prefs_gpg_get_config()->gpg_warning = FALSE;
 673                 }
 674         }
 675 }
 676
 677 void sgpgme_done()
 678 {
 679         gpgmegtk_free_passphrase();
 680 }
 681
 682 void sgpgme_create_secret_key(PrefsAccount *account, gboolean ask_create)
 683 {
 684         AlertValue val = G_ALERTDEFAULT;
 685         gchar *key_parms = NULL;
 686         gchar *name = NULL;
 687         gchar *email = NULL;
 688         gchar *passphrase = NULL, *passphrase_second = NULL;
 689         gint prev_bad = 0;
 690         gchar *tmp = NULL;
 691         gpgme_error_t err = 0;
 692         gpgme_ctx_t ctx;
 693         GtkWidget *window = NULL;
 694         gpgme_genkey_result_t key;
 695
 696         if (account == NULL)
 697                 account = account_get_default();
 698
 699         if (account->address == NULL) {
 700                 alertpanel_error(_("You have to save the account's information with \"OK\" "
 701                                    "before being able to generate a key pair.\n"));
 702                 return;
 703         }
 704         if (ask_create) {
 705                 val = alertpanel(_("No PGP key found"),
 706                                 _("Claws Mail did not find a secret PGP key, "
 707                                   "which means that you won't be able to sign "
 708                                   "emails or receive encrypted emails.\n"
 709                                   "Do you want to create a new key pair now?"),
 710                                   GTK_STOCK_NO, "+" GTK_STOCK_YES, NULL);
 711                 if (val == G_ALERTDEFAULT) {
 712                         prefs_gpg_get_config()->gpg_ask_create_key = FALSE;
 713                         prefs_gpg_save_config();
 714                         return;
 715                 }
 716         }
 717
 718         if (account->name) {
 719                 name = g_strdup(account->name);
 720         } else {
 721                 name = g_strdup(account->address);
 722         }
 723         email = g_strdup(account->address);
 724         tmp = g_strdup_printf("%s <%s>", account->name?account->name:account->address, account->address);
 725 again:
 726         passphrase = passphrase_mbox(tmp, NULL, prev_bad, 1);
 727         if (passphrase == NULL) {
 728                 g_free(tmp);
 729                 g_free(email);
 730                 g_free(name);
 731                 return;
 732         }
 733         passphrase_second = passphrase_mbox(tmp, NULL, 0, 2);
 734         if (passphrase_second == NULL) {
 735                 g_free(tmp);
 736                 g_free(email);
 737                 g_free(passphrase);
 738                 g_free(name);
 739                 return;
 740         }
 741         if (strcmp(passphrase, passphrase_second)) {
 742                 g_free(passphrase);
 743                 g_free(passphrase_second);
 744                 prev_bad = 1;
 745                 goto again;
 746         }
 747
 748         key_parms = g_strdup_printf("<GnupgKeyParms format=\"internal\">\n"
 749                                         "Key-Type: DSA\n"
 750                                         "Key-Length: 1024\n"
 751                                         "Subkey-Type: ELG-E\n"
 752                                         "Subkey-Length: 2048\n"
 753                                         "Name-Real: %s\n"
 754                                         "Name-Email: %s\n"
 755                                         "Expire-Date: 0\n"
 756                                         "%s%s%s"
 757                                         "</GnupgKeyParms>\n",
 758                                         name, email,
 759                                         strlen(passphrase)?"Passphrase: ":"",
 760                                         passphrase,
 761                                         strlen(passphrase)?"\n":"");
 762 #ifndef G_PLATFORM_WIN32
 763         if (mlock(passphrase, strlen(passphrase)) == -1)
 764                 debug_print("couldn't lock passphrase\n");
 765         if (mlock(passphrase_second, strlen(passphrase_second)) == -1)
 766                 debug_print("couldn't lock passphrase2\n");
 767 #endif
 768         g_free(tmp);
 769         g_free(email);
 770         g_free(name);
 771         g_free(passphrase_second);
 772         g_free(passphrase);
 773
 774         err = gpgme_new (&ctx);
 775         if (err) {
 776                 alertpanel_error(_("Couldn't generate a new key pair: %s"),
 777                                  gpgme_strerror(err));
 778                 g_free(key_parms);
 779                 return;
 780         }
 781
 782
 783         window = label_window_create(_("Generating your new key pair... Please move the mouse "
 784                               "around to help generate entropy..."));
 785
 786         err = gpgme_op_genkey(ctx, key_parms, NULL, NULL);
 787         g_free(key_parms);
 788
 789         label_window_destroy(window);
 790
 791         if (err) {
 792                 alertpanel_error(_("Couldn't generate a new key pair: %s"), gpgme_strerror(err));
 793                 gpgme_release(ctx);
 794                 return;
 795         }
 796         key = gpgme_op_genkey_result(ctx);
 797         if (key == NULL) {
 798                 alertpanel_error(_("Couldn't generate a new key pair: unknown error"));
 799                 gpgme_release(ctx);
 800                 return;
 801         } else {
 802                 gchar *buf = g_strdup_printf(_("Your new key pair has been generated. "
 803                                     "Its fingerprint is:\n%s\n\nDo you want to export it "
 804                                     "to a keyserver?"),
 805                                     key->fpr ? key->fpr:"null");
 806                 AlertValue val = alertpanel(_("Key generated"), buf,
 807                                   GTK_STOCK_NO, "+" GTK_STOCK_YES, NULL);
 808                 g_free(buf);
 809                 if (val == G_ALERTALTERNATE) {
 810 #ifndef G_OS_WIN32
 811                         gchar *cmd = g_strdup_printf("gpg --no-tty --send-keys %s", key->fpr);
 812                         int res = 0;
 813                         pid_t pid = 0;
 814                         pid = fork();
 815                         if (pid == -1) {
 816                                 res = -1;
 817                         } else if (pid == 0) {
 818                                 /* son */
 819                                 res = system(cmd);
 820                                 res = WEXITSTATUS(res);
 821                                 _exit(res);
 822                         } else {
 823                                 int status = 0;
 824                                 time_t start_wait = time(NULL);
 825                                 res = -1;
 826                                 do {
 827                                         if (waitpid(pid, &status, WNOHANG) == 0 || !WIFEXITED(status)) {
 828                                                 usleep(200000);
 829                                         } else {
 830                                                 res = WEXITSTATUS(status);
 831                                                 break;
 832                                         }
 833                                         if (time(NULL) - start_wait > 5) {
 834                                                 debug_print("SIGTERM'ing gpg\n");
 835                                                 kill(pid, SIGTERM);
 836                                         }
 837                                         if (time(NULL) - start_wait > 6) {
 838                                                 debug_print("SIGKILL'ing gpg\n");
 839                                                 kill(pid, SIGKILL);
 840                                                 break;
 841                                         }
 842                                 } while(1);
 843                         }
 844                         if (res == 0) {
 845                                 alertpanel_notice(_("Key exported."));
 846                         } else {
 847                                 alertpanel_error(_("Couldn't export key."));
 848                         }
 849                         g_free(cmd);
 850 #else
 851                         alertpanel_error(_("Key export isn't implemented in Windows."));
 852 #endif
 853                 }
 854         }
 855         prefs_gpg_get_config()->gpg_ask_create_key = FALSE;
 856         prefs_gpg_save_config();
 857         gpgme_release(ctx);
 858 }
 859
 860 gboolean sgpgme_has_secret_key(void)
 861 {
 862         gpgme_error_t err = 0;
 863         gpgme_ctx_t ctx;
 864         gpgme_key_t key;
 865
 866         err = gpgme_new (&ctx);
 867         if (err) {
 868                 debug_print("err : %s\n", gpgme_strerror(err));
 869                 return TRUE;
 870         }
 871 check_again:
 872         err = gpgme_op_keylist_start(ctx, NULL, TRUE);
 873         if (!err)
 874                 err = gpgme_op_keylist_next(ctx, &key);
 875         gpgme_op_keylist_end(ctx);
 876         if (gpg_err_code(err) == GPG_ERR_EOF) {
 877                 if (gpgme_get_protocol(ctx) != GPGME_PROTOCOL_CMS) {
 878                         gpgme_set_protocol(ctx, GPGME_PROTOCOL_CMS);
 879                         goto check_again;
 880                 }
 881                 gpgme_release(ctx);
 882                 return FALSE;
 883         } else {
 884                 gpgme_release(ctx);
 885                 return TRUE;
 886         }
 887 }
 888
 889 void sgpgme_check_create_key(void)
 890 {
 891         if (prefs_gpg_get_config()->gpg_ask_create_key &&
 892             !sgpgme_has_secret_key()) {
 893                 sgpgme_create_secret_key(NULL, TRUE);
 894         } else {
 895                 prefs_gpg_get_config()->gpg_ask_create_key = FALSE;
 896                 prefs_gpg_save_config();
 897         }
 898 }
 899
 900 void *sgpgme_data_release_and_get_mem(gpgme_data_t data, size_t *len)
 901 {
 902         char buf[BUFSIZ];
 903         void *result = NULL;
 904         ssize_t r = 0;
 905         size_t w = 0;
 906
 907         if (data == NULL)
 908                 return NULL;
 909         if (len == NULL)
 910                 return NULL;
 911
 912         /* I know it's deprecated, but we don't compile with _LARGEFILE */
 913         cm_gpgme_data_rewind(data);
 914         while ((r = gpgme_data_read(data, buf, BUFSIZ)) > 0) {
 915                 result = realloc(result, r + w);
 916                 memcpy(result+w, buf, r);
 917                 w += r;
 918         }
 919
 920         *len = w;
 921
 922         gpgme_data_release(data);
 923         if (r < 0) {
 924                 free(result);
 925                 *len = 0;
 926                 return NULL;
 927         }
 928         return result;
 929 }
 930
 931 gpgme_error_t cm_gpgme_data_rewind(gpgme_data_t dh)
 932 {
 933 #if defined(_FILE_OFFSET_BITS) && _FILE_OFFSET_BITS == 64
 934         if (gpgme_data_seek(dh, (off_t)0, SEEK_SET) == -1)
 935                 return gpg_error_from_errno(errno);
 936         else
 937                 return 0;
 938 #else
 939         return gpgme_data_rewind(dh);
 940 #endif
 941 }
 942
 943 #endif /* USE_GPGME */