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         unsigned long validity = 0;
  89         gpgme_signature_t sig = NULL;
  90
  91         if (GPOINTER_TO_INT(status) == -GPG_ERR_SYSTEM_ERROR) {
  92                 debug_print("system error\n");
  93                 return SIGNATURE_CHECK_FAILED;
  94         }
  95
  96         if (status == NULL) {
  97                 debug_print("status == NULL\n");
  98                 return SIGNATURE_UNCHECKED;
  99         }
 100         sig = status->signatures;
 101
 102         if (sig == NULL) {
 103                 debug_print("sig == NULL\n");
 104                 return SIGNATURE_UNCHECKED;
 105         }
 106         validity = sig->validity;
 107
 108         debug_print("err code %d\n", gpg_err_code(sig->status));
 109         switch (gpg_err_code(sig->status)) {
 110         case GPG_ERR_NO_ERROR:
 111                 switch (gpg_err_code(sig->validity)) {
 112                 case GPGME_VALIDITY_NEVER:
 113                         return SIGNATURE_INVALID;
 114                 case GPGME_VALIDITY_UNKNOWN:
 115                 case GPGME_VALIDITY_UNDEFINED:
 116                 case GPGME_VALIDITY_MARGINAL:
 117                 case GPGME_VALIDITY_FULL:
 118                 case GPGME_VALIDITY_ULTIMATE:
 119                         return SIGNATURE_OK;
 120                 default:
 121                         return SIGNATURE_CHECK_FAILED;
 122                 }
 123         case GPG_ERR_SIG_EXPIRED:
 124         case GPG_ERR_CERT_REVOKED:
 125                 return SIGNATURE_WARN;
 126         case GPG_ERR_KEY_EXPIRED:
 127                 return SIGNATURE_KEY_EXPIRED;
 128         case GPG_ERR_BAD_SIGNATURE:
 129                 return SIGNATURE_INVALID;
 130         case GPG_ERR_NO_PUBKEY:
 131                 return SIGNATURE_CHECK_FAILED;
 132         default:
 133                 return SIGNATURE_CHECK_FAILED;
 134         }
 135         return SIGNATURE_CHECK_FAILED;
 136 }
 137
 138 static const gchar *get_validity_str(unsigned long validity)
 139 {
 140         switch (gpg_err_code(validity)) {
 141         case GPGME_VALIDITY_UNKNOWN:
 142                 return _("Unknown");
 143         case GPGME_VALIDITY_UNDEFINED:
 144                 return _("Undefined");
 145         case GPGME_VALIDITY_NEVER:
 146                 return _("Never");
 147         case GPGME_VALIDITY_MARGINAL:
 148                 return _("Marginal");
 149         case GPGME_VALIDITY_FULL:
 150                 return _("Full");
 151         case GPGME_VALIDITY_ULTIMATE:
 152                 return _("Ultimate");
 153         default:
 154                 return _("Error");
 155         }
 156 }
 157
 158 static gchar *extract_name(const char *uid)
 159 {
 160         if (uid == NULL)
 161                 return NULL;
 162         if (!strncmp(uid, "CN=", 3)) {
 163                 gchar *result = g_strdup(uid+3);
 164                 if (strstr(result, ","))
 165                         *(strstr(result, ",")) = '\0';
 166                 return result;
 167         } else if (strstr(uid, ",CN=")) {
 168                 gchar *result = g_strdup(strstr(uid, ",CN=")+4);
 169                 if (strstr(result, ","))
 170                         *(strstr(result, ",")) = '\0';
 171                 return result;
 172         } else {
 173                 return g_strdup(uid);
 174         }
 175 }
 176 gchar *sgpgme_sigstat_info_short(gpgme_ctx_t ctx, gpgme_verify_result_t status)
 177 {
 178         gpgme_signature_t sig = NULL;
 179         gchar *uname = NULL;
 180         gpgme_key_t key;
 181         gchar *result = NULL;
 182         gpgme_error_t err = 0;
 183         static gboolean warned = FALSE;
 184
 185         if (GPOINTER_TO_INT(status) == -GPG_ERR_SYSTEM_ERROR) {
 186                 return g_strdup_printf(_("The signature can't be checked - %s"), privacy_get_error());
 187         }
 188
 189         if (status == NULL) {
 190                 return g_strdup(_("The signature has not been checked."));
 191         }
 192         sig = status->signatures;
 193         if (sig == NULL) {
 194                 return g_strdup(_("The signature has not been checked."));
 195         }
 196
 197         err = gpgme_get_key(ctx, sig->fpr, &key, 0);
 198         if (gpg_err_code(err) == GPG_ERR_NO_AGENT) {
 199                 if (!warned)
 200                         alertpanel_error(_("PGP Core: Can't get key - no gpg-agent running."));
 201                 else
 202                         g_warning(_("PGP Core: Can't get key - no gpg-agent running."));
 203                 warned = TRUE;
 204         } else if (gpg_err_code(err) != GPG_ERR_NO_ERROR && gpg_err_code(err) != GPG_ERR_EOF) {
 205                 return g_strdup_printf(_("The signature can't be checked - %s"),
 206                         gpgme_strerror(err));
 207         }
 208         if (key)
 209                 uname = extract_name(key->uids->uid);
 210         else
 211                 uname = g_strdup("<?>");
 212         switch (gpg_err_code(sig->status)) {
 213         case GPG_ERR_NO_ERROR:
 214                 switch (gpg_err_code(sig->validity)) {
 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_MARGINAL:
 220                 case GPGME_VALIDITY_UNKNOWN:
 221                 case GPGME_VALIDITY_UNDEFINED:
 222                 case GPGME_VALIDITY_NEVER:
 223                 default:
 224                         result = g_strdup_printf(_("Good signature (untrusted) from %s."), uname);
 225                         break;
 226                 }
 227                 break;
 228         case GPG_ERR_SIG_EXPIRED:
 229                 result = g_strdup_printf(_("Expired signature from %s."), uname);
 230                 break;
 231         case GPG_ERR_KEY_EXPIRED:
 232                 result = g_strdup_printf(_("Expired key from %s."), uname);
 233                 break;
 234         case GPG_ERR_BAD_SIGNATURE:
 235                 result = g_strdup_printf(_("Bad signature from %s."), uname);
 236                 break;
 237         case GPG_ERR_NO_PUBKEY: {
 238                 gchar *id = g_strdup(sig->fpr + strlen(sig->fpr)-8);
 239                 result = g_strdup_printf(_("Key 0x%s not available to verify this signature."), id);
 240                 g_free(id);
 241                 break;
 242                 }
 243         default:
 244                 result = g_strdup(_("The signature has not been checked."));
 245                 break;
 246         }
 247         if (result == NULL)
 248                 result = g_strdup(_("Error"));
 249         g_free(uname);
 250         return result;
 251 }
 252
 253 gchar *sgpgme_sigstat_info_full(gpgme_ctx_t ctx, gpgme_verify_result_t status)
 254 {
 255         gint i = 0;
 256         gchar *ret;
 257         GString *siginfo;
 258         gpgme_signature_t sig = NULL;
 259
 260         siginfo = g_string_sized_new(64);
 261         if (status == NULL) {
 262                 g_string_append_printf(siginfo,
 263                         _("Error checking signature: no status\n"));
 264                 goto bail;
 265          }
 266
 267         sig = status->signatures;
 268
 269         while (sig) {
 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                 g_string_append_printf(siginfo,
 296                         _("Signature made using %s key ID %s\n"),
 297                         keytype, keyid);
 298
 299                 switch (gpg_err_code(sig->status)) {
 300                 case GPG_ERR_NO_ERROR:
 301                 case GPG_ERR_KEY_EXPIRED:
 302                         g_string_append_printf(siginfo,
 303                                 _("Good signature from uid \"%s\" (Validity: %s)\n"),
 304                                 uid, get_validity_str(user?user->validity:GPGME_VALIDITY_UNKNOWN));
 305                         break;
 306                 case GPG_ERR_SIG_EXPIRED:
 307                         g_string_append_printf(siginfo,
 308                                 _("Expired signature from uid \"%s\" (Validity: %s)\n"),
 309                                 uid, get_validity_str(user?user->validity:GPGME_VALIDITY_UNKNOWN));
 310                         break;
 311                 case GPG_ERR_BAD_SIGNATURE:
 312                         g_string_append_printf(siginfo,
 313                                 _("BAD signature from \"%s\"\n"),
 314                                 uid);
 315                         break;
 316                 default:
 317                         break;
 318                 }
 319                 if (sig->status != GPG_ERR_BAD_SIGNATURE) {
 320                         gint j = 1;
 321                         user = user ? user->next : NULL;
 322                         while (user != NULL) {
 323                                 g_string_append_printf(siginfo,
 324                                         _("                    uid \"%s\" (Validity: %s)\n"),
 325                                         user->uid,
 326                                         get_validity_str(user->validity));
 327                                 j++;
 328                                 user = user->next;
 329                         }
 330                         g_string_append_printf(siginfo,
 331                                 _("Primary key fingerprint:"));
 332                         const char* primary_fpr = NULL;
 333                         if (key && key->subkeys && key->subkeys->fpr)
 334                                 primary_fpr = key->subkeys->fpr;
 335                         else
 336                                 g_string_append(siginfo, " ?");
 337                         int idx; /* now pretty-print the fingerprint */
 338                         for (idx=0; primary_fpr && *primary_fpr!='\0'; idx++, primary_fpr++) {
 339                                 if (idx%4==0)
 340                                         g_string_append_c(siginfo, ' ');
 341                                 if (idx%20==0)
 342                                         g_string_append_c(siginfo, ' ');
 343                                 g_string_append_c(siginfo, (gchar)*primary_fpr);
 344                         }
 345                         g_string_append_c(siginfo, '\n');
 346 #ifdef HAVE_GPGME_PKA_TRUST
 347                         if (sig->pka_trust == 1 && sig->pka_address) {
 348                                 g_string_append_printf(siginfo,
 349                                    _("WARNING: Signer's address \"%s\" "
 350                                       "does not match DNS entry\n"),
 351                                    sig->pka_address);
 352                         }
 353                         else if (sig->pka_trust == 2 && sig->pka_address) {
 354                                 g_string_append_printf(siginfo,
 355                                    _("Verified signer's address is \"%s\"\n"),
 356                                    sig->pka_address);
 357                                 /* FIXME: Compare the address to the
 358                                  * From: address.  */
 359                         }
 360 #endif /*HAVE_GPGME_PKA_TRUST*/
 361                 }
 362
 363                 g_string_append(siginfo, "\n");
 364                 i++;
 365                 sig = sig->next;
 366         }
 367 bail:
 368         ret = siginfo->str;
 369         g_string_free(siginfo, FALSE);
 370         return ret;
 371 }
 372
 373 gpgme_data_t sgpgme_data_from_mimeinfo(MimeInfo *mimeinfo)
 374 {
 375         gpgme_data_t data = NULL;
 376         gpgme_error_t err;
 377         FILE *fp = g_fopen(mimeinfo->data.filename, "rb");
 378         gchar *tmp_file = NULL;
 379
 380         if (!fp)
 381                 return NULL;
 382
 383         tmp_file = get_tmp_file();
 384         copy_file_part(fp, mimeinfo->offset, mimeinfo->length, tmp_file);
 385         fclose(fp);
 386         fp = NULL;
 387         debug_print("tmp file %s\n", tmp_file);
 388
 389         err = gpgme_data_new_from_file(&data, tmp_file, 1);
 390         claws_unlink(tmp_file);
 391         g_free(tmp_file);
 392
 393         debug_print("data %p (%d %d)\n", (void *)&data, mimeinfo->offset, mimeinfo->length);
 394         if (err) {
 395                 debug_print ("gpgme_data_new_from_file failed: %s\n",
 396                              gpgme_strerror (err));
 397                 privacy_set_error(_("Couldn't get data from message, %s"), gpgme_strerror(err));
 398                 return NULL;
 399         }
 400         return data;
 401 }
 402
 403 gpgme_data_t sgpgme_decrypt_verify(gpgme_data_t cipher, gpgme_verify_result_t *status, gpgme_ctx_t ctx)
 404 {
 405         struct passphrase_cb_info_s info;
 406         gpgme_data_t plain;
 407         gpgme_error_t err;
 408
 409         memset (&info, 0, sizeof info);
 410
 411         if ((err = gpgme_data_new(&plain)) != GPG_ERR_NO_ERROR) {
 412                 gpgme_release(ctx);
 413                 privacy_set_error(_("Couldn't initialize data, %s"), gpgme_strerror(err));
 414                 return NULL;
 415         }
 416
 417         if (gpgme_get_protocol(ctx) == GPGME_PROTOCOL_OpenPGP) {
 418                 prefs_gpg_enable_agent(prefs_gpg_get_config()->use_gpg_agent);
 419                 if (!getenv("GPG_AGENT_INFO") || !prefs_gpg_get_config()->use_gpg_agent) {
 420                         info.c = ctx;
 421                         gpgme_set_passphrase_cb (ctx, gpgmegtk_passphrase_cb, &info);
 422                 }
 423         } else {
 424                 prefs_gpg_enable_agent(TRUE);
 425                 info.c = ctx;
 426                 gpgme_set_passphrase_cb (ctx, NULL, &info);
 427         }
 428
 429
 430         if (gpgme_get_protocol(ctx) == GPGME_PROTOCOL_OpenPGP) {
 431                 err = gpgme_op_decrypt_verify(ctx, cipher, plain);
 432                 if (err != GPG_ERR_NO_ERROR) {
 433                         debug_print("can't decrypt (%s)\n", gpgme_strerror(err));
 434                         privacy_set_error("%s", gpgme_strerror(err));
 435                         gpgmegtk_free_passphrase();
 436                         gpgme_data_release(plain);
 437                         return NULL;
 438                 }
 439
 440                 err = cm_gpgme_data_rewind(plain);
 441                 if (err) {
 442                         debug_print("can't seek (%d %d %s)\n", err, errno, strerror(errno));
 443                 }
 444
 445                 debug_print("decrypted.\n");
 446                 *status = gpgme_op_verify_result (ctx);
 447         } else {
 448                 err = gpgme_op_decrypt(ctx, cipher, plain);
 449                 if (err != GPG_ERR_NO_ERROR) {
 450                         debug_print("can't decrypt (%s)\n", gpgme_strerror(err));
 451                         privacy_set_error("%s", gpgme_strerror(err));
 452                         gpgmegtk_free_passphrase();
 453                         gpgme_data_release(plain);
 454                         return NULL;
 455                 }
 456
 457                 err = cm_gpgme_data_rewind(plain);
 458                 if (err) {
 459                         debug_print("can't seek (%d %d %s)\n", err, errno, strerror(errno));
 460                 }
 461
 462                 debug_print("decrypted.\n");
 463                 *status = gpgme_op_verify_result (ctx);
 464         }
 465         return plain;
 466 }
 467
 468 gchar *sgpgme_get_encrypt_data(GSList *recp_names, gpgme_protocol_t proto)
 469 {
 470         SelectionResult result = KEY_SELECTION_CANCEL;
 471         gpgme_key_t *keys = gpgmegtk_recipient_selection(recp_names, &result,
 472                                 proto);
 473         gchar *ret = NULL;
 474         int i = 0;
 475
 476         if (!keys) {
 477                 if (result == KEY_SELECTION_DONT)
 478                         return g_strdup("_DONT_ENCRYPT_");
 479                 else
 480                         return NULL;
 481         }
 482         while (keys[i]) {
 483                 gpgme_subkey_t skey = keys[i]->subkeys;
 484                 gchar *fpr = skey->fpr;
 485                 gchar *tmp = NULL;
 486                 debug_print("adding %s\n", fpr);
 487                 tmp = g_strconcat(ret?ret:"", fpr, " ", NULL);
 488                 g_free(ret);
 489                 ret = tmp;
 490                 i++;
 491         }
 492         return ret;
 493 }
 494
 495 gboolean sgpgme_setup_signers(gpgme_ctx_t ctx, PrefsAccount *account,
 496                               const gchar *from_addr)
 497 {
 498         GPGAccountConfig *config;
 499         const gchar *signer_addr = account->address;
 500
 501         gpgme_signers_clear(ctx);
 502
 503         if (from_addr)
 504                 signer_addr = from_addr;
 505         config = prefs_gpg_account_get_config(account);
 506
 507         switch(config->sign_key) {
 508         case SIGN_KEY_DEFAULT:
 509                 debug_print("using default gnupg key\n");
 510                 break;
 511         case SIGN_KEY_BY_FROM:
 512                 debug_print("using key for %s\n", signer_addr);
 513                 break;
 514         case SIGN_KEY_CUSTOM:
 515                 debug_print("using key for %s\n", config->sign_key_id);
 516                 break;
 517         }
 518
 519         if (config->sign_key != SIGN_KEY_DEFAULT) {
 520                 const gchar *keyid;
 521                 gpgme_key_t key, key2;
 522                 gpgme_error_t err;
 523
 524                 if (config->sign_key == SIGN_KEY_BY_FROM)
 525                         keyid = signer_addr;
 526                 else if (config->sign_key == SIGN_KEY_CUSTOM)
 527                         keyid = config->sign_key_id;
 528                 else
 529                         goto bail;
 530
 531                 err = gpgme_op_keylist_start(ctx, keyid, 1);
 532                 if (!err) {
 533                         do {
 534                                 err = gpgme_op_keylist_next(ctx, &key);
 535                                 if (!err && key && key->protocol == gpgme_get_protocol(ctx) &&
 536                                     !key->expired && !key->revoked && !key->disabled)
 537                                         break;
 538                                 if (!err && key && key->protocol != gpgme_get_protocol(ctx)) {
 539                                         debug_print("skipping a key (wrong protocol %d)\n", key->protocol);
 540                                         gpgme_key_release(key);
 541                                 }
 542                                 if (!err && key && (key->expired || key->revoked || key->disabled)) {
 543
 544                                         debug_print("skipping a key");
 545                                         if (key->expired)
 546                                                 debug_print(" expired");
 547                                         if (key->revoked)
 548                                                 debug_print(" revoked");
 549                                         if (key->disabled)
 550                                                 debug_print(" disabled");
 551                                         debug_print("\n");
 552                                         gpgme_key_release(key);
 553                                 }
 554                         } while (!err);
 555                 }
 556                 if (err) {
 557                         g_warning("setup_signers start: %s", gpgme_strerror(err));
 558                         privacy_set_error(_("Secret key not found (%s)"), gpgme_strerror(err));
 559                         goto bail;
 560                 }
 561
 562                 do {
 563                         err = gpgme_op_keylist_next(ctx, &key2);
 564                         if (!err && key2 && key2->protocol == gpgme_get_protocol(ctx) &&
 565                             !key2->expired && !key2->revoked && !key2->disabled)
 566                                 break;
 567                         if (!err && key2 && key2->protocol != gpgme_get_protocol(ctx)) {
 568                                 debug_print("skipping a key (wrong protocol %d)\n", key2->protocol);
 569                                 gpgme_key_release(key2);
 570                         }
 571                         if (!err && key2 && (key2->expired || key2->revoked || key2->disabled)) {
 572                                         debug_print("skipping a key");
 573                                         if (key2->expired)
 574                                                 debug_print(" expired");
 575                                         if (key2->revoked)
 576                                                 debug_print(" revoked");
 577                                         if (key2->disabled)
 578                                                 debug_print(" disabled");
 579                                         debug_print("\n");
 580                                 gpgme_key_release(key2);
 581                         }
 582                 } while (!err);
 583                 if (!err) {
 584                         gpgme_key_release(key2);
 585                         g_warning("ambiguous specification of secret key '%s'\n",
 586                                 keyid);
 587                         privacy_set_error(_("Secret key specification is ambiguous"));
 588                         goto bail;
 589                 }
 590
 591                 gpgme_op_keylist_end(ctx);
 592                 err = gpgme_signers_add(ctx, key);
 593                 debug_print("got key (proto %d (pgp %d, smime %d).\n", key->protocol,
 594                                 GPGME_PROTOCOL_OpenPGP, GPGME_PROTOCOL_CMS);
 595                 gpgme_key_release(key);
 596
 597                 if (err) {
 598                         g_warning("error adding secret key: %s\n", gpgme_strerror(err));
 599                         privacy_set_error(_("Error setting secret key: %s"), gpgme_strerror(err));
 600                         goto bail;
 601                 }
 602         }
 603
 604         prefs_gpg_account_free_config(config);
 605
 606         return TRUE;
 607 bail:
 608         prefs_gpg_account_free_config(config);
 609         return FALSE;
 610 }
 611
 612 void sgpgme_init()
 613 {
 614         gpgme_engine_info_t engineInfo;
 615         if (gpgme_check_version("1.0.0")) {
 616 #ifdef LC_CTYPE
 617                 gpgme_set_locale(NULL, LC_CTYPE, setlocale(LC_CTYPE, NULL));
 618 #endif
 619 #ifdef LC_MESSAGES
 620                 gpgme_set_locale(NULL, LC_MESSAGES, setlocale(LC_MESSAGES, NULL));
 621 #endif
 622                 if (!gpgme_get_engine_info(&engineInfo)) {
 623                         while (engineInfo) {
 624 #ifndef G_OS_WIN32
 625                                 debug_print("GpgME Protocol: %s\n"
 626                                             "Version: %s (req %s)\n"
 627                                             "Executable: %s\n",
 628                                         gpgme_get_protocol_name(engineInfo->protocol) ? gpgme_get_protocol_name(engineInfo->protocol):"???",
 629                                         engineInfo->version ? engineInfo->version:"???",
 630                                         engineInfo->req_version ? engineInfo->req_version:"???",
 631                                         engineInfo->file_name ? engineInfo->file_name:"???");
 632 #endif
 633                                 if (engineInfo->protocol == GPGME_PROTOCOL_OpenPGP
 634                                 &&  gpgme_engine_check_version(engineInfo->protocol) !=
 635                                         GPG_ERR_NO_ERROR) {
 636                                         if (engineInfo->file_name && !engineInfo->version) {
 637                                                 alertpanel_error(_("Gpgme protocol '%s' is unusable: "
 638                                                                    "Engine '%s' isn't installed properly."),
 639                                                                    gpgme_get_protocol_name(engineInfo->protocol),
 640                                                                    engineInfo->file_name);
 641                                         } else if (engineInfo->file_name && engineInfo->version
 642                                           && engineInfo->req_version) {
 643                                                 alertpanel_error(_("Gpgme protocol '%s' is unusable: "
 644                                                                    "Engine '%s' version %s is installed, "
 645                                                                    "but version %s is required.\n"),
 646                                                                    gpgme_get_protocol_name(engineInfo->protocol),
 647                                                                    engineInfo->file_name,
 648                                                                    engineInfo->version,
 649                                                                    engineInfo->req_version);
 650                                         } else {
 651                                                 alertpanel_error(_("Gpgme protocol '%s' is unusable "
 652                                                                    "(unknown problem)"),
 653                                                                    gpgme_get_protocol_name(engineInfo->protocol));
 654                                         }
 655                                 }
 656                                 engineInfo = engineInfo->next;
 657                         }
 658                 }
 659         } else {
 660                 sgpgme_disable_all();
 661
 662                 if (prefs_gpg_get_config()->gpg_warning) {
 663                         AlertValue val;
 664
 665                         val = alertpanel_full
 666                                 (_("Warning"),
 667                                  _("GnuPG is not installed properly, or needs "
 668                                  "to be upgraded.\n"
 669                                  "OpenPGP support disabled."),
 670                                  GTK_STOCK_CLOSE, NULL, NULL, TRUE, NULL,
 671                                  ALERT_WARNING, G_ALERTDEFAULT);
 672                         if (val & G_ALERTDISABLE)
 673                                 prefs_gpg_get_config()->gpg_warning = FALSE;
 674                 }
 675         }
 676 }
 677
 678 void sgpgme_done()
 679 {
 680         gpgmegtk_free_passphrase();
 681 }
 682
 683 void sgpgme_create_secret_key(PrefsAccount *account, gboolean ask_create)
 684 {
 685         AlertValue val = G_ALERTDEFAULT;
 686         gchar *key_parms = NULL;
 687         gchar *name = NULL;
 688         gchar *email = NULL;
 689         gchar *passphrase = NULL, *passphrase_second = NULL;
 690         gint prev_bad = 0;
 691         gchar *tmp = NULL;
 692         gpgme_error_t err = 0;
 693         gpgme_ctx_t ctx;
 694         GtkWidget *window = NULL;
 695         gpgme_genkey_result_t key;
 696
 697         if (account == NULL)
 698                 account = account_get_default();
 699
 700         if (account->address == NULL) {
 701                 alertpanel_error(_("You have to save the account's information with \"OK\" "
 702                                    "before being able to generate a key pair.\n"));
 703                 return;
 704         }
 705         if (ask_create) {
 706                 val = alertpanel(_("No PGP key found"),
 707                                 _("Claws Mail did not find a secret PGP key, "
 708                                   "which means that you won't be able to sign "
 709                                   "emails or receive encrypted emails.\n"
 710                                   "Do you want to create a new key pair now?"),
 711                                   GTK_STOCK_NO, "+" GTK_STOCK_YES, NULL);
 712                 if (val == G_ALERTDEFAULT) {
 713                         prefs_gpg_get_config()->gpg_ask_create_key = FALSE;
 714                         prefs_gpg_save_config();
 715                         return;
 716                 }
 717         }
 718
 719         if (account->name) {
 720                 name = g_strdup(account->name);
 721         } else {
 722                 name = g_strdup(account->address);
 723         }
 724         email = g_strdup(account->address);
 725         tmp = g_strdup_printf("%s <%s>", account->name?account->name:account->address, account->address);
 726 again:
 727         passphrase = passphrase_mbox(tmp, NULL, prev_bad, 1);
 728         if (passphrase == NULL) {
 729                 g_free(tmp);
 730                 g_free(email);
 731                 g_free(name);
 732                 return;
 733         }
 734         passphrase_second = passphrase_mbox(tmp, NULL, 0, 2);
 735         if (passphrase_second == NULL) {
 736                 g_free(tmp);
 737                 g_free(email);
 738                 g_free(passphrase);
 739                 g_free(name);
 740                 return;
 741         }
 742         if (strcmp(passphrase, passphrase_second)) {
 743                 g_free(passphrase);
 744                 g_free(passphrase_second);
 745                 prev_bad = 1;
 746                 goto again;
 747         }
 748
 749         key_parms = g_strdup_printf("<GnupgKeyParms format=\"internal\">\n"
 750                                         "Key-Type: DSA\n"
 751                                         "Key-Length: 1024\n"
 752                                         "Subkey-Type: ELG-E\n"
 753                                         "Subkey-Length: 2048\n"
 754                                         "Name-Real: %s\n"
 755                                         "Name-Email: %s\n"
 756                                         "Expire-Date: 0\n"
 757                                         "%s%s%s"
 758                                         "</GnupgKeyParms>\n",
 759                                         name, email,
 760                                         strlen(passphrase)?"Passphrase: ":"",
 761                                         passphrase,
 762                                         strlen(passphrase)?"\n":"");
 763 #ifndef G_PLATFORM_WIN32
 764         if (mlock(passphrase, strlen(passphrase)) == -1)
 765                 debug_print("couldn't lock passphrase\n");
 766         if (mlock(passphrase_second, strlen(passphrase_second)) == -1)
 767                 debug_print("couldn't lock passphrase2\n");
 768 #endif
 769         g_free(tmp);
 770         g_free(email);
 771         g_free(name);
 772         g_free(passphrase_second);
 773         g_free(passphrase);
 774
 775         err = gpgme_new (&ctx);
 776         if (err) {
 777                 alertpanel_error(_("Couldn't generate a new key pair: %s"),
 778                                  gpgme_strerror(err));
 779                 g_free(key_parms);
 780                 return;
 781         }
 782
 783
 784         window = label_window_create(_("Generating your new key pair... Please move the mouse "
 785                               "around to help generate entropy..."));
 786
 787         err = gpgme_op_genkey(ctx, key_parms, NULL, NULL);
 788         g_free(key_parms);
 789
 790         label_window_destroy(window);
 791
 792         if (err) {
 793                 alertpanel_error(_("Couldn't generate a new key pair: %s"), gpgme_strerror(err));
 794                 gpgme_release(ctx);
 795                 return;
 796         }
 797         key = gpgme_op_genkey_result(ctx);
 798         if (key == NULL) {
 799                 alertpanel_error(_("Couldn't generate a new key pair: unknown error"));
 800                 gpgme_release(ctx);
 801                 return;
 802         } else {
 803                 gchar *buf = g_strdup_printf(_("Your new key pair has been generated. "
 804                                     "Its fingerprint is:\n%s\n\nDo you want to export it "
 805                                     "to a keyserver?"),
 806                                     key->fpr ? key->fpr:"null");
 807                 AlertValue val = alertpanel(_("Key generated"), buf,
 808                                   GTK_STOCK_NO, "+" GTK_STOCK_YES, NULL);
 809                 g_free(buf);
 810                 if (val == G_ALERTALTERNATE) {
 811 #ifndef G_OS_WIN32
 812                         gchar *cmd = g_strdup_printf("gpg --no-tty --send-keys %s", key->fpr);
 813                         int res = 0;
 814                         pid_t pid = 0;
 815                         pid = fork();
 816                         if (pid == -1) {
 817                                 res = -1;
 818                         } else if (pid == 0) {
 819                                 /* son */
 820                                 res = system(cmd);
 821                                 res = WEXITSTATUS(res);
 822                                 _exit(res);
 823                         } else {
 824                                 int status = 0;
 825                                 time_t start_wait = time(NULL);
 826                                 res = -1;
 827                                 do {
 828                                         if (waitpid(pid, &status, WNOHANG) == 0 || !WIFEXITED(status)) {
 829                                                 usleep(200000);
 830                                         } else {
 831                                                 res = WEXITSTATUS(status);
 832                                                 break;
 833                                         }
 834                                         if (time(NULL) - start_wait > 5) {
 835                                                 debug_print("SIGTERM'ing gpg\n");
 836                                                 kill(pid, SIGTERM);
 837                                         }
 838                                         if (time(NULL) - start_wait > 6) {
 839                                                 debug_print("SIGKILL'ing gpg\n");
 840                                                 kill(pid, SIGKILL);
 841                                                 break;
 842                                         }
 843                                 } while(1);
 844                         }
 845                         if (res == 0) {
 846                                 alertpanel_notice(_("Key exported."));
 847                         } else {
 848                                 alertpanel_error(_("Couldn't export key."));
 849                         }
 850                         g_free(cmd);
 851 #else
 852                         alertpanel_error(_("Key export isn't implemented in Windows."));
 853 #endif
 854                 }
 855         }
 856         prefs_gpg_get_config()->gpg_ask_create_key = FALSE;
 857         prefs_gpg_save_config();
 858         gpgme_release(ctx);
 859 }
 860
 861 gboolean sgpgme_has_secret_key(void)
 862 {
 863         gpgme_error_t err = 0;
 864         gpgme_ctx_t ctx;
 865         gpgme_key_t key;
 866
 867         err = gpgme_new (&ctx);
 868         if (err) {
 869                 debug_print("err : %s\n", gpgme_strerror(err));
 870                 return TRUE;
 871         }
 872 check_again:
 873         err = gpgme_op_keylist_start(ctx, NULL, TRUE);
 874         if (!err)
 875                 err = gpgme_op_keylist_next(ctx, &key);
 876         gpgme_op_keylist_end(ctx);
 877         if (gpg_err_code(err) == GPG_ERR_EOF) {
 878                 if (gpgme_get_protocol(ctx) != GPGME_PROTOCOL_CMS) {
 879                         gpgme_set_protocol(ctx, GPGME_PROTOCOL_CMS);
 880                         goto check_again;
 881                 }
 882                 gpgme_release(ctx);
 883                 return FALSE;
 884         } else {
 885                 gpgme_release(ctx);
 886                 return TRUE;
 887         }
 888 }
 889
 890 void sgpgme_check_create_key(void)
 891 {
 892         if (prefs_gpg_get_config()->gpg_ask_create_key &&
 893             !sgpgme_has_secret_key()) {
 894                 sgpgme_create_secret_key(NULL, TRUE);
 895         } else {
 896                 prefs_gpg_get_config()->gpg_ask_create_key = FALSE;
 897                 prefs_gpg_save_config();
 898         }
 899 }
 900
 901 void *sgpgme_data_release_and_get_mem(gpgme_data_t data, size_t *len)
 902 {
 903         char buf[BUFSIZ];
 904         void *result = NULL;
 905         ssize_t r = 0;
 906         size_t w = 0;
 907
 908         if (data == NULL)
 909                 return NULL;
 910         if (len == NULL)
 911                 return NULL;
 912
 913         /* I know it's deprecated, but we don't compile with _LARGEFILE */
 914         cm_gpgme_data_rewind(data);
 915         while ((r = gpgme_data_read(data, buf, BUFSIZ)) > 0) {
 916                 result = realloc(result, r + w);
 917                 memcpy(result+w, buf, r);
 918                 w += r;
 919         }
 920
 921         *len = w;
 922
 923         gpgme_data_release(data);
 924         if (r < 0) {
 925                 free(result);
 926                 *len = 0;
 927                 return NULL;
 928         }
 929         return result;
 930 }
 931
 932 gpgme_error_t cm_gpgme_data_rewind(gpgme_data_t dh)
 933 {
 934 #if defined(_FILE_OFFSET_BITS) && _FILE_OFFSET_BITS == 64
 935         if (gpgme_data_seek(dh, (off_t)0, SEEK_SET) == -1)
 936                 return gpg_error_from_errno(errno);
 937         else
 938                 return 0;
 939 #else
 940         return gpgme_data_rewind(dh);
 941 #endif
 942 }
 943
 944 #endif /* USE_GPGME */