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