src/plugins/pgpcore/sgpgme.c

   1 /*
   2  * Claws Mail -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2014 the Claws Mail team
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 3 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  17  *
  18  */
  19
  20 #ifdef HAVE_CONFIG_H
  21 #  include "config.h"
  22 #include "claws-features.h"
  23 #endif
  24
  25 #ifdef USE_GPGME
  26
  27 #include <time.h>
  28 #include <gtk/gtk.h>
  29 #include <gpgme.h>
  30 #include <glib.h>
  31 #include <glib/gi18n.h>
  32 #include <stdio.h>
  33 #include <string.h>
  34 #include <stdlib.h>
  35 #include <errno.h>
  36 #include <sys/types.h>
  37 #ifndef G_OS_WIN32
  38 #  include <sys/wait.h>
  39 #endif
  40 #if (defined(__DragonFly__) || defined(SOLARIS) || defined (__NetBSD__) || defined (__FreeBSD__) || defined (__OpenBSD__))
  41 #  include <sys/signal.h>
  42 #endif
  43 #ifndef G_OS_WIN32
  44 #include <sys/mman.h>
  45 #endif
  46 #if HAVE_LOCALE_H
  47 #  include <locale.h>
  48 #endif
  49
  50 #include "sgpgme.h"
  51 #include "privacy.h"
  52 #include "prefs_common.h"
  53 #include "utils.h"
  54 #include "alertpanel.h"
  55 #include "passphrase.h"
  56 #include "prefs_gpg.h"
  57 #include "account.h"
  58 #include "select-keys.h"
  59
  60 static void sgpgme_disable_all(void)
  61 {
  62     /* FIXME: set a flag, so that we don't bother the user with failed
  63      * gpgme messages */
  64 }
  65
  66 gpgme_verify_result_t sgpgme_verify_signature(gpgme_ctx_t ctx, gpgme_data_t sig,
  67                                         gpgme_data_t plain, gpgme_data_t dummy)
  68 {
  69         gpgme_verify_result_t status = NULL;
  70         gpgme_error_t err;
  71
  72         if ((err = gpgme_op_verify(ctx, sig, plain, dummy)) != GPG_ERR_NO_ERROR) {
  73                 debug_print("op_verify err %s\n", gpgme_strerror(err));
  74                 privacy_set_error("%s", gpgme_strerror(err));
  75                 return GINT_TO_POINTER(-GPG_ERR_SYSTEM_ERROR);
  76         }
  77         status = gpgme_op_verify_result(ctx);
  78         if (status && status->signatures == NULL) {
  79                 debug_print("no signature found\n");
  80                 privacy_set_error(_("No signature found"));
  81                 return GINT_TO_POINTER(-GPG_ERR_SYSTEM_ERROR);
  82         }
  83         return status;
  84 }
  85
  86 SignatureStatus sgpgme_sigstat_gpgme_to_privacy(gpgme_ctx_t ctx, gpgme_verify_result_t status)
  87 {
  88         gpgme_signature_t sig = NULL;
  89
  90         if (GPOINTER_TO_INT(status) == -GPG_ERR_SYSTEM_ERROR) {
  91                 debug_print("system error\n");
  92                 return SIGNATURE_CHECK_FAILED;
  93         }
  94
  95         if (status == NULL) {
  96                 debug_print("status == NULL\n");
  97                 return SIGNATURE_UNCHECKED;
  98         }
  99         sig = status->signatures;
 100
 101         if (sig == NULL) {
 102                 debug_print("sig == NULL\n");
 103                 return SIGNATURE_UNCHECKED;
 104         }
 105
 106         debug_print("err code %d\n", gpg_err_code(sig->status));
 107         switch (gpg_err_code(sig->status)) {
 108         case GPG_ERR_NO_ERROR:
 109                 switch (sig->validity) {
 110                 case GPGME_VALIDITY_NEVER:
 111                         return SIGNATURE_INVALID;
 112                 case GPGME_VALIDITY_UNKNOWN:
 113                 case GPGME_VALIDITY_UNDEFINED:
 114                 case GPGME_VALIDITY_MARGINAL:
 115                 case GPGME_VALIDITY_FULL:
 116                 case GPGME_VALIDITY_ULTIMATE:
 117                         return SIGNATURE_OK;
 118                 default:
 119                         return SIGNATURE_CHECK_FAILED;
 120                 }
 121         case GPG_ERR_SIG_EXPIRED:
 122         case GPG_ERR_CERT_REVOKED:
 123                 return SIGNATURE_WARN;
 124         case GPG_ERR_KEY_EXPIRED:
 125                 return SIGNATURE_KEY_EXPIRED;
 126         case GPG_ERR_BAD_SIGNATURE:
 127                 return SIGNATURE_INVALID;
 128         case GPG_ERR_NO_PUBKEY:
 129                 return SIGNATURE_CHECK_FAILED;
 130         default:
 131                 return SIGNATURE_CHECK_FAILED;
 132         }
 133         return SIGNATURE_CHECK_FAILED;
 134 }
 135
 136 static const gchar *get_validity_str(unsigned long validity)
 137 {
 138         switch (gpg_err_code(validity)) {
 139         case GPGME_VALIDITY_UNKNOWN:
 140                 return _("Unknown");
 141         case GPGME_VALIDITY_UNDEFINED:
 142                 return _("Undefined");
 143         case GPGME_VALIDITY_NEVER:
 144                 return _("Never");
 145         case GPGME_VALIDITY_MARGINAL:
 146                 return _("Marginal");
 147         case GPGME_VALIDITY_FULL:
 148                 return _("Full");
 149         case GPGME_VALIDITY_ULTIMATE:
 150                 return _("Ultimate");
 151         default:
 152                 return _("Error");
 153         }
 154 }
 155
 156 static const gchar *get_owner_trust_str(unsigned long owner_trust)
 157 {
 158         switch (gpgme_err_code(owner_trust)) {
 159         case GPGME_VALIDITY_NEVER:
 160                 return _("Untrusted");
 161         case GPGME_VALIDITY_MARGINAL:
 162                 return _("Marginal");
 163         case GPGME_VALIDITY_FULL:
 164                 return _("Full");
 165         case GPGME_VALIDITY_ULTIMATE:
 166                 return _("Ultimate");
 167         default:
 168                 return _("Unknown");
 169         }
 170 }
 171
 172 static gchar *extract_name(const char *uid)
 173 {
 174         if (uid == NULL)
 175                 return NULL;
 176         if (!strncmp(uid, "CN=", 3)) {
 177                 gchar *result = g_strdup(uid+3);
 178                 if (strstr(result, ","))
 179                         *(strstr(result, ",")) = '\0';
 180                 return result;
 181         } else if (strstr(uid, ",CN=")) {
 182                 gchar *result = g_strdup(strstr(uid, ",CN=")+4);
 183                 if (strstr(result, ","))
 184                         *(strstr(result, ",")) = '\0';
 185                 return result;
 186         } else {
 187                 return g_strdup(uid);
 188         }
 189 }
 190 gchar *sgpgme_sigstat_info_short(gpgme_ctx_t ctx, gpgme_verify_result_t status)
 191 {
 192         gpgme_signature_t sig = NULL;
 193         gchar *uname = NULL;
 194         gpgme_key_t key;
 195         gchar *result = NULL;
 196         gpgme_error_t err = 0;
 197         static gboolean warned = FALSE;
 198
 199         if (GPOINTER_TO_INT(status) == -GPG_ERR_SYSTEM_ERROR) {
 200                 return g_strdup_printf(_("The signature can't be checked - %s"), privacy_get_error());
 201         }
 202
 203         if (status == NULL) {
 204                 return g_strdup(_("The signature has not been checked."));
 205         }
 206         sig = status->signatures;
 207         if (sig == NULL) {
 208                 return g_strdup(_("The signature has not been checked."));
 209         }
 210
 211         err = gpgme_get_key(ctx, sig->fpr, &key, 0);
 212         if (gpg_err_code(err) == GPG_ERR_NO_AGENT) {
 213                 if (!warned)
 214                         alertpanel_error(_("PGP Core: Can't get key - no gpg-agent running."));
 215                 else
 216                         g_warning(_("PGP Core: Can't get key - no gpg-agent running."));
 217                 warned = TRUE;
 218         } else if (gpg_err_code(err) != GPG_ERR_NO_ERROR && gpg_err_code(err) != GPG_ERR_EOF) {
 219                 return g_strdup_printf(_("The signature can't be checked - %s"),
 220                         gpgme_strerror(err));
 221         }
 222         if (key)
 223                 uname = extract_name(key->uids->uid);
 224         else
 225                 uname = g_strdup("<?>");
 226         switch (gpg_err_code(sig->status)) {
 227         case GPG_ERR_NO_ERROR:
 228                 result = g_strdup_printf(_("Good signature from %s."), uname);
 229                 break;
 230         case GPG_ERR_SIG_EXPIRED:
 231                 result = g_strdup_printf(_("Expired signature from %s."), uname);
 232                 break;
 233         case GPG_ERR_KEY_EXPIRED:
 234                 result = g_strdup_printf(_("Good signature from %s, but the key has expired."), uname);
 235                 break;
 236         case GPG_ERR_CERT_REVOKED:
 237                 result = g_strdup_printf(_("Good signature from %s, but the key has been revoked."), uname);
 238                 break;
 239         case GPG_ERR_BAD_SIGNATURE:
 240                 result = g_strdup_printf(_("Bad signature from %s."), uname);
 241                 break;
 242         case GPG_ERR_NO_PUBKEY: {
 243                 gchar *id = g_strdup(sig->fpr + strlen(sig->fpr)-8);
 244                 result = g_strdup_printf(_("Key 0x%s not available to verify this signature."), id);
 245                 g_free(id);
 246                 break;
 247                 }
 248         default:
 249                 result = g_strdup(_("The signature has not been checked."));
 250                 break;
 251         }
 252         if (result == NULL)
 253                 result = g_strdup(_("Error"));
 254         g_free(uname);
 255         return result;
 256 }
 257
 258 gchar *sgpgme_sigstat_info_full(gpgme_ctx_t ctx, gpgme_verify_result_t status)
 259 {
 260         gint i = 0;
 261         gchar *ret;
 262         GString *siginfo;
 263         gpgme_signature_t sig = NULL;
 264
 265         siginfo = g_string_sized_new(64);
 266         if (status == NULL) {
 267                 g_string_append_printf(siginfo,
 268                         _("Error checking signature: no status\n"));
 269                 goto bail;
 270          }
 271
 272         sig = status->signatures;
 273
 274         while (sig) {
 275                 char buf[100];
 276                 struct tm lt;
 277                 gpgme_user_id_t user = NULL;
 278                 gpgme_key_t key;
 279                 gpgme_error_t err;
 280                 const gchar *keytype, *keyid, *uid;
 281
 282                 err = gpgme_get_key(ctx, sig->fpr, &key, 0);
 283
 284                 if (err != GPG_ERR_NO_ERROR) {
 285                         key = NULL;
 286                         g_string_append_printf(siginfo,
 287                                 _("Error checking signature: %s\n"),
 288                                 gpgme_strerror(err));
 289                         goto bail;
 290                 }
 291                 if (key) {
 292                         user = key->uids;
 293                         keytype = gpgme_pubkey_algo_name(
 294                                         key->subkeys->pubkey_algo);
 295                         keyid = key->subkeys->keyid;
 296                         uid = user->uid;
 297                 } else {
 298                         keytype = "?";
 299                         keyid = "?";
 300                         uid = "?";
 301                 }
 302
 303                 memset(buf, 0, sizeof(buf));
 304                 fast_strftime(buf, sizeof(buf)-1, prefs_common_get_prefs()->date_format, localtime_r(&sig->timestamp, &lt));
 305                 g_string_append_printf(siginfo,
 306                         _("Signature made on %s using %s key ID %s\n"),
 307                         buf, keytype, keyid);
 308
 309                 switch (gpg_err_code(sig->status)) {
 310                 case GPG_ERR_NO_ERROR:
 311                         g_string_append_printf(siginfo,
 312                                 _("Good signature from uid \"%s\" (Validity: %s)\n"),
 313                                 uid, get_validity_str(user?user->validity:GPGME_VALIDITY_UNKNOWN));
 314                         break;
 315                 case GPG_ERR_KEY_EXPIRED:
 316                         g_string_append_printf(siginfo,
 317                                 _("Expired key uid \"%s\"\n"),
 318                                 uid);
 319                         break;
 320                 case GPG_ERR_SIG_EXPIRED:
 321                         g_string_append_printf(siginfo,
 322                                 _("Expired signature from uid \"%s\" (Validity: %s)\n"),
 323                                 uid, get_validity_str(user?user->validity:GPGME_VALIDITY_UNKNOWN));
 324                         break;
 325                 case GPG_ERR_CERT_REVOKED:
 326                         g_string_append_printf(siginfo,
 327                                 _("Revoked key uid \"%s\"\n"),
 328                                 uid);
 329                         break;
 330                 case GPG_ERR_BAD_SIGNATURE:
 331                         g_string_append_printf(siginfo,
 332                                 _("BAD signature from \"%s\"\n"),
 333                                 uid);
 334                         break;
 335                 default:
 336                         break;
 337                 }
 338                 if (sig->status != GPG_ERR_BAD_SIGNATURE) {
 339                         gint j = 1;
 340                         user = user ? user->next : NULL;
 341                         while (user != NULL) {
 342                                 g_string_append_printf(siginfo,
 343                                         _("                    uid \"%s\" (Validity: %s)\n"),
 344                                         user->uid,
 345                                         user->revoked==TRUE?_("Revoked"):get_validity_str(user->validity));
 346                                 j++;
 347                                 user = user->next;
 348                         }
 349                         g_string_append_printf(siginfo,_("Owner Trust: %s\n"),
 350                                                get_owner_trust_str(key->owner_trust));
 351                         g_string_append(siginfo,
 352                                 _("Primary key fingerprint:"));
 353                         const char* primary_fpr = NULL;
 354                         if (key && key->subkeys && key->subkeys->fpr)
 355                                 primary_fpr = key->subkeys->fpr;
 356                         else
 357                                 g_string_append(siginfo, " ?");
 358                         int idx; /* now pretty-print the fingerprint */
 359                         for (idx=0; primary_fpr && *primary_fpr!='\0'; idx++, primary_fpr++) {
 360                                 if (idx%4==0)
 361                                         g_string_append_c(siginfo, ' ');
 362                                 if (idx%20==0)
 363                                         g_string_append_c(siginfo, ' ');
 364                                 g_string_append_c(siginfo, (gchar)*primary_fpr);
 365                         }
 366                         g_string_append_c(siginfo, '\n');
 367 #ifdef HAVE_GPGME_PKA_TRUST
 368                         if (sig->pka_trust == 1 && sig->pka_address) {
 369                                 g_string_append_printf(siginfo,
 370                                    _("WARNING: Signer's address \"%s\" "
 371                                       "does not match DNS entry\n"),
 372                                    sig->pka_address);
 373                         }
 374                         else if (sig->pka_trust == 2 && sig->pka_address) {
 375                                 g_string_append_printf(siginfo,
 376                                    _("Verified signer's address is \"%s\"\n"),
 377                                    sig->pka_address);
 378                                 /* FIXME: Compare the address to the
 379                                  * From: address.  */
 380                         }
 381 #endif /*HAVE_GPGME_PKA_TRUST*/
 382                 }
 383
 384                 g_string_append(siginfo, "\n");
 385                 i++;
 386                 sig = sig->next;
 387         }
 388 bail:
 389         ret = siginfo->str;
 390         g_string_free(siginfo, FALSE);
 391         return ret;
 392 }
 393
 394 gpgme_data_t sgpgme_data_from_mimeinfo(MimeInfo *mimeinfo)
 395 {
 396         gpgme_data_t data = NULL;
 397         gpgme_error_t err;
 398         FILE *fp = g_fopen(mimeinfo->data.filename, "rb");
 399
 400         if (!fp)
 401                 return NULL;
 402
 403         err = gpgme_data_new_from_filepart(&data, NULL, fp, mimeinfo->offset, mimeinfo->length);
 404         fclose(fp);
 405
 406         debug_print("data %p (%d %d)\n", (void *)&data, mimeinfo->offset, mimeinfo->length);
 407         if (err) {
 408                 debug_print ("gpgme_data_new_from_file failed: %s\n",
 409                              gpgme_strerror (err));
 410                 privacy_set_error(_("Couldn't get data from message, %s"), gpgme_strerror(err));
 411                 return NULL;
 412         }
 413         return data;
 414 }
 415
 416 gpgme_data_t sgpgme_decrypt_verify(gpgme_data_t cipher, gpgme_verify_result_t *status, gpgme_ctx_t ctx)
 417 {
 418         struct passphrase_cb_info_s info;
 419         gpgme_data_t plain;
 420         gpgme_error_t err;
 421
 422         memset (&info, 0, sizeof info);
 423
 424         if ((err = gpgme_data_new(&plain)) != GPG_ERR_NO_ERROR) {
 425                 gpgme_release(ctx);
 426                 privacy_set_error(_("Couldn't initialize data, %s"), gpgme_strerror(err));
 427                 return NULL;
 428         }
 429
 430         if (gpgme_get_protocol(ctx) == GPGME_PROTOCOL_OpenPGP) {
 431                 prefs_gpg_enable_agent(prefs_gpg_get_config()->use_gpg_agent);
 432                 if (!getenv("GPG_AGENT_INFO") || !prefs_gpg_get_config()->use_gpg_agent) {
 433                         info.c = ctx;
 434                         gpgme_set_passphrase_cb (ctx, gpgmegtk_passphrase_cb, &info);
 435                 }
 436         } else {
 437                 prefs_gpg_enable_agent(TRUE);
 438                 info.c = ctx;
 439                 gpgme_set_passphrase_cb (ctx, NULL, &info);
 440         }
 441
 442
 443         if (gpgme_get_protocol(ctx) == GPGME_PROTOCOL_OpenPGP) {
 444                 err = gpgme_op_decrypt_verify(ctx, cipher, plain);
 445                 if (err != GPG_ERR_NO_ERROR) {
 446                         debug_print("can't decrypt (%s)\n", gpgme_strerror(err));
 447                         privacy_set_error("%s", gpgme_strerror(err));
 448                         gpgmegtk_free_passphrase();
 449                         gpgme_data_release(plain);
 450                         return NULL;
 451                 }
 452
 453                 err = cm_gpgme_data_rewind(plain);
 454                 if (err) {
 455                         debug_print("can't seek (%d %d %s)\n", err, errno, strerror(errno));
 456                 }
 457
 458                 debug_print("decrypted.\n");
 459                 *status = gpgme_op_verify_result (ctx);
 460         } else {
 461                 err = gpgme_op_decrypt(ctx, cipher, plain);
 462                 if (err != GPG_ERR_NO_ERROR) {
 463                         debug_print("can't decrypt (%s)\n", gpgme_strerror(err));
 464                         privacy_set_error("%s", gpgme_strerror(err));
 465                         gpgmegtk_free_passphrase();
 466                         gpgme_data_release(plain);
 467                         return NULL;
 468                 }
 469
 470                 err = cm_gpgme_data_rewind(plain);
 471                 if (err) {
 472                         debug_print("can't seek (%d %d %s)\n", err, errno, strerror(errno));
 473                 }
 474
 475                 debug_print("decrypted.\n");
 476                 *status = gpgme_op_verify_result (ctx);
 477         }
 478         return plain;
 479 }
 480
 481 gchar *sgpgme_get_encrypt_data(GSList *recp_names, gpgme_protocol_t proto)
 482 {
 483         SelectionResult result = KEY_SELECTION_CANCEL;
 484         gpgme_key_t *keys = gpgmegtk_recipient_selection(recp_names, &result,
 485                                 proto);
 486         gchar *ret = NULL;
 487         int i = 0;
 488
 489         if (!keys) {
 490                 if (result == KEY_SELECTION_DONT)
 491                         return g_strdup("_DONT_ENCRYPT_");
 492                 else
 493                         return NULL;
 494         }
 495         while (keys[i]) {
 496                 gpgme_subkey_t skey = keys[i]->subkeys;
 497                 gchar *fpr = skey->fpr;
 498                 gchar *tmp = NULL;
 499                 debug_print("adding %s\n", fpr);
 500                 tmp = g_strconcat(ret?ret:"", fpr, " ", NULL);
 501                 g_free(ret);
 502                 ret = tmp;
 503                 i++;
 504         }
 505         return ret;
 506 }
 507
 508 gboolean sgpgme_setup_signers(gpgme_ctx_t ctx, PrefsAccount *account,
 509                               const gchar *from_addr)
 510 {
 511         GPGAccountConfig *config;
 512         const gchar *signer_addr = account->address;
 513
 514         gpgme_signers_clear(ctx);
 515
 516         if (from_addr)
 517                 signer_addr = from_addr;
 518         config = prefs_gpg_account_get_config(account);
 519
 520         switch(config->sign_key) {
 521         case SIGN_KEY_DEFAULT:
 522                 debug_print("using default gnupg key\n");
 523                 break;
 524         case SIGN_KEY_BY_FROM:
 525                 debug_print("using key for %s\n", signer_addr);
 526                 break;
 527         case SIGN_KEY_CUSTOM:
 528                 debug_print("using key for %s\n", config->sign_key_id);
 529                 break;
 530         }
 531
 532         if (config->sign_key != SIGN_KEY_DEFAULT) {
 533                 const gchar *keyid;
 534                 gpgme_key_t key, found_key;
 535                 gpgme_error_t err;
 536
 537                 if (config->sign_key == SIGN_KEY_BY_FROM)
 538                         keyid = signer_addr;
 539                 else if (config->sign_key == SIGN_KEY_CUSTOM)
 540                         keyid = config->sign_key_id;
 541                 else
 542                         goto bail;
 543
 544                 found_key = NULL;
 545                 /* Look for any key, not just private ones, or GPGMe doesn't
 546                  * correctly set the revoked flag. */
 547                 err = gpgme_op_keylist_start(ctx, keyid, 0);
 548                 while ((err = gpgme_op_keylist_next(ctx, &key)) == 0) {
 549                         if (key == NULL)
 550                                 continue;
 551
 552                         if (!key->can_sign)
 553                                 continue;
 554
 555                         if (key->protocol != gpgme_get_protocol(ctx)) {
 556                                 debug_print("skipping a key (wrong protocol %d)\n", key->protocol);
 557                                 gpgme_key_release(key);
 558                                 continue;
 559                         }
 560
 561                         if (key->expired) {
 562                                 debug_print("skipping a key, expired");
 563                                 gpgme_key_release(key);
 564                                 continue;
 565                         }
 566                         if (key->revoked) {
 567                                 debug_print("skipping a key, revoked");
 568                                 gpgme_key_release(key);
 569                                 continue;
 570                         }
 571                         if (key->disabled) {
 572                                 debug_print("skipping a key, disabled");
 573                                 gpgme_key_release(key);
 574                                 continue;
 575                         }
 576
 577                         if (found_key != NULL) {
 578                                 gpgme_key_release(key);
 579                                 gpgme_op_keylist_end(ctx);
 580                                 g_warning("ambiguous specification of secret key '%s'\n", keyid);
 581                                 privacy_set_error(_("Secret key specification is ambiguous"));
 582                                 goto bail;
 583                         }
 584
 585                         found_key = key;
 586                 }
 587                 gpgme_op_keylist_end(ctx);
 588
 589                 if (found_key == NULL) {
 590                         g_warning("setup_signers start: %s", gpgme_strerror(err));
 591                         privacy_set_error(_("Secret key not found (%s)"), gpgme_strerror(err));
 592                         goto bail;
 593                 }
 594
 595                 err = gpgme_signers_add(ctx, found_key);
 596                 debug_print("got key (proto %d (pgp %d, smime %d).\n",
 597                             found_key->protocol, GPGME_PROTOCOL_OpenPGP,
 598                             GPGME_PROTOCOL_CMS);
 599                 gpgme_key_release(found_key);
 600
 601                 if (err) {
 602                         g_warning("error adding secret key: %s\n",
 603                                   gpgme_strerror(err));
 604                         privacy_set_error(_("Error setting secret key: %s"),
 605                                           gpgme_strerror(err));
 606                         goto bail;
 607                 }
 608         }
 609
 610         prefs_gpg_account_free_config(config);
 611
 612         return TRUE;
 613 bail:
 614         prefs_gpg_account_free_config(config);
 615         return FALSE;
 616 }
 617
 618 void sgpgme_init()
 619 {
 620         gchar *ctype_locale = NULL, *messages_locale = NULL;
 621         gchar *ctype_utf8_locale = NULL, *messages_utf8_locale = NULL;
 622
 623         gpgme_engine_info_t engineInfo;
 624         if (gpgme_check_version("1.0.0")) {
 625 #ifdef LC_CTYPE
 626                 debug_print("setting gpgme CTYPE locale\n");
 627 #ifdef G_OS_WIN32
 628                 ctype_locale = g_win32_getlocale();
 629 #else
 630                 ctype_locale = g_strdup(setlocale(LC_CTYPE, NULL));
 631 #endif
 632                 if (ctype_locale) {
 633                         debug_print("setting gpgme CTYPE locale to: %s\n", ctype_locale);
 634                         if (strchr(ctype_locale, '.'))
 635                                 *(strchr(ctype_locale, '.')) = '\0';
 636                         else if (strchr(ctype_locale, '@'))
 637                                 *(strchr(ctype_locale, '@')) = '\0';
 638                         ctype_utf8_locale = g_strconcat(ctype_locale, ".UTF-8", NULL);
 639
 640                         debug_print("setting gpgme locale to UTF8: %s\n", ctype_utf8_locale ? ctype_utf8_locale : "NULL");
 641                         gpgme_set_locale(NULL, LC_CTYPE, ctype_utf8_locale);
 642
 643                         debug_print("done\n");
 644                         g_free(ctype_utf8_locale);
 645                         g_free(ctype_locale);
 646                 } else {
 647                         debug_print("couldn't set gpgme CTYPE locale\n");
 648                 }
 649 #endif
 650 #ifdef LC_MESSAGES
 651                 debug_print("setting gpgme MESSAGES locale\n");
 652 #ifdef G_OS_WIN32
 653                 messages_locale = g_win32_getlocale();
 654 #else
 655                 messages_locale = g_strdup(setlocale(LC_MESSAGES, NULL));
 656 #endif
 657                 if (messages_locale) {
 658                         debug_print("setting gpgme MESSAGES locale to: %s\n", messages_locale);
 659                         if (strchr(messages_locale, '.'))
 660                                 *(strchr(messages_locale, '.')) = '\0';
 661                         else if (strchr(messages_locale, '@'))
 662                                 *(strchr(messages_locale, '@')) = '\0';
 663                         messages_utf8_locale = g_strconcat(messages_locale, ".UTF-8", NULL);
 664                         debug_print("setting gpgme locale to UTF8: %s\n", messages_utf8_locale ? messages_utf8_locale : "NULL");
 665
 666                         gpgme_set_locale(NULL, LC_MESSAGES, messages_utf8_locale);
 667
 668                         debug_print("done\n");
 669                         g_free(messages_utf8_locale);
 670                         g_free(messages_locale);
 671                 } else {
 672                         debug_print("couldn't set gpgme MESSAGES locale\n");
 673                 }
 674 #endif
 675                 if (!gpgme_get_engine_info(&engineInfo)) {
 676                         while (engineInfo) {
 677                                 debug_print("GpgME Protocol: %s\n"
 678                                             "Version: %s (req %s)\n"
 679                                             "Executable: %s\n",
 680                                         gpgme_get_protocol_name(engineInfo->protocol) ? gpgme_get_protocol_name(engineInfo->protocol):"???",
 681                                         engineInfo->version ? engineInfo->version:"???",
 682                                         engineInfo->req_version ? engineInfo->req_version:"???",
 683                                         engineInfo->file_name ? engineInfo->file_name:"???");
 684                                 if (engineInfo->protocol == GPGME_PROTOCOL_OpenPGP
 685                                 &&  gpgme_engine_check_version(engineInfo->protocol) !=
 686                                         GPG_ERR_NO_ERROR) {
 687                                         if (engineInfo->file_name && !engineInfo->version) {
 688                                                 alertpanel_error(_("Gpgme protocol '%s' is unusable: "
 689                                                                    "Engine '%s' isn't installed properly."),
 690                                                                    gpgme_get_protocol_name(engineInfo->protocol),
 691                                                                    engineInfo->file_name);
 692                                         } else if (engineInfo->file_name && engineInfo->version
 693                                           && engineInfo->req_version) {
 694                                                 alertpanel_error(_("Gpgme protocol '%s' is unusable: "
 695                                                                    "Engine '%s' version %s is installed, "
 696                                                                    "but version %s is required.\n"),
 697                                                                    gpgme_get_protocol_name(engineInfo->protocol),
 698                                                                    engineInfo->file_name,
 699                                                                    engineInfo->version,
 700                                                                    engineInfo->req_version);
 701                                         } else {
 702                                                 alertpanel_error(_("Gpgme protocol '%s' is unusable "
 703                                                                    "(unknown problem)"),
 704                                                                    gpgme_get_protocol_name(engineInfo->protocol));
 705                                         }
 706                                 }
 707                                 engineInfo = engineInfo->next;
 708                         }
 709                 }
 710         } else {
 711                 sgpgme_disable_all();
 712
 713                 if (prefs_gpg_get_config()->gpg_warning) {
 714                         AlertValue val;
 715
 716                         val = alertpanel_full
 717                                 (_("Warning"),
 718                                  _("GnuPG is not installed properly, or needs "
 719                                  "to be upgraded.\n"
 720                                  "OpenPGP support disabled."),
 721                                  GTK_STOCK_CLOSE, NULL, NULL, TRUE, NULL,
 722                                  ALERT_WARNING, G_ALERTDEFAULT);
 723                         if (val & G_ALERTDISABLE)
 724                                 prefs_gpg_get_config()->gpg_warning = FALSE;
 725                 }
 726         }
 727 }
 728
 729 void sgpgme_done()
 730 {
 731         gpgmegtk_free_passphrase();
 732 }
 733
 734 void sgpgme_create_secret_key(PrefsAccount *account, gboolean ask_create)
 735 {
 736         AlertValue val = G_ALERTDEFAULT;
 737         gchar *key_parms = NULL;
 738         gchar *name = NULL;
 739         gchar *email = NULL;
 740         gchar *passphrase = NULL, *passphrase_second = NULL;
 741         gint prev_bad = 0;
 742         gchar *tmp = NULL;
 743         gpgme_error_t err = 0;
 744         gpgme_ctx_t ctx;
 745         GtkWidget *window = NULL;
 746         gpgme_genkey_result_t key;
 747
 748         if (account == NULL)
 749                 account = account_get_default();
 750
 751         if (account->address == NULL) {
 752                 alertpanel_error(_("You have to save the account's information with \"OK\" "
 753                                    "before being able to generate a key pair.\n"));
 754                 return;
 755         }
 756         if (ask_create) {
 757                 val = alertpanel(_("No PGP key found"),
 758                                 _("Claws Mail did not find a secret PGP key, "
 759                                   "which means that you won't be able to sign "
 760                                   "emails or receive encrypted emails.\n"
 761                                   "Do you want to create a new key pair now?"),
 762                                   GTK_STOCK_NO, "+" GTK_STOCK_YES, NULL);
 763                 if (val == G_ALERTDEFAULT) {
 764                         prefs_gpg_get_config()->gpg_ask_create_key = FALSE;
 765                         prefs_gpg_save_config();
 766                         return;
 767                 }
 768         }
 769
 770         if (account->name) {
 771                 name = g_strdup(account->name);
 772         } else {
 773                 name = g_strdup(account->address);
 774         }
 775         email = g_strdup(account->address);
 776         tmp = g_strdup_printf("%s <%s>", account->name?account->name:account->address, account->address);
 777 again:
 778         passphrase = passphrase_mbox(tmp, NULL, prev_bad, 1);
 779         if (passphrase == NULL) {
 780                 g_free(tmp);
 781                 g_free(email);
 782                 g_free(name);
 783                 return;
 784         }
 785         passphrase_second = passphrase_mbox(tmp, NULL, 0, 2);
 786         if (passphrase_second == NULL) {
 787                 g_free(tmp);
 788                 g_free(email);
 789                 g_free(passphrase);
 790                 g_free(name);
 791                 return;
 792         }
 793         if (strcmp(passphrase, passphrase_second)) {
 794                 g_free(passphrase);
 795                 g_free(passphrase_second);
 796                 prev_bad = 1;
 797                 goto again;
 798         }
 799
 800         key_parms = g_strdup_printf("<GnupgKeyParms format=\"internal\">\n"
 801                                         "Key-Type: RSA\n"
 802                                         "Key-Length: 2048\n"
 803                                         "Subkey-Type: RSA\n"
 804                                         "Subkey-Length: 2048\n"
 805                                         "Name-Real: %s\n"
 806                                         "Name-Email: %s\n"
 807                                         "Expire-Date: 0\n"
 808                                         "%s%s%s"
 809                                         "</GnupgKeyParms>\n",
 810                                         name, email,
 811                                         strlen(passphrase)?"Passphrase: ":"",
 812                                         passphrase,
 813                                         strlen(passphrase)?"\n":"");
 814 #ifndef G_PLATFORM_WIN32
 815         if (mlock(passphrase, strlen(passphrase)) == -1)
 816                 debug_print("couldn't lock passphrase\n");
 817         if (mlock(passphrase_second, strlen(passphrase_second)) == -1)
 818                 debug_print("couldn't lock passphrase2\n");
 819 #endif
 820         g_free(tmp);
 821         g_free(email);
 822         g_free(name);
 823         g_free(passphrase_second);
 824         g_free(passphrase);
 825
 826         err = gpgme_new (&ctx);
 827         if (err) {
 828                 alertpanel_error(_("Couldn't generate a new key pair: %s"),
 829                                  gpgme_strerror(err));
 830                 g_free(key_parms);
 831                 return;
 832         }
 833
 834
 835         window = label_window_create(_("Generating your new key pair... Please move the mouse "
 836                               "around to help generate entropy..."));
 837
 838         err = gpgme_op_genkey(ctx, key_parms, NULL, NULL);
 839         g_free(key_parms);
 840
 841         label_window_destroy(window);
 842
 843         if (err) {
 844                 alertpanel_error(_("Couldn't generate a new key pair: %s"), gpgme_strerror(err));
 845                 gpgme_release(ctx);
 846                 return;
 847         }
 848         key = gpgme_op_genkey_result(ctx);
 849         if (key == NULL) {
 850                 alertpanel_error(_("Couldn't generate a new key pair: unknown error"));
 851                 gpgme_release(ctx);
 852                 return;
 853         } else {
 854                 gchar *buf = g_strdup_printf(_("Your new key pair has been generated. "
 855                                     "Its fingerprint is:\n%s\n\nDo you want to export it "
 856                                     "to a keyserver?"),
 857                                     key->fpr ? key->fpr:"null");
 858                 AlertValue val = alertpanel(_("Key generated"), buf,
 859                                   GTK_STOCK_NO, "+" GTK_STOCK_YES, NULL);
 860                 g_free(buf);
 861                 if (val == G_ALERTALTERNATE) {
 862 #ifndef G_OS_WIN32
 863                         gchar *cmd = g_strdup_printf("gpg --no-tty --send-keys %s", key->fpr);
 864                         int res = 0;
 865                         pid_t pid = 0;
 866                         pid = fork();
 867                         if (pid == -1) {
 868                                 res = -1;
 869                         } else if (pid == 0) {
 870                                 /* son */
 871                                 res = system(cmd);
 872                                 res = WEXITSTATUS(res);
 873                                 _exit(res);
 874                         } else {
 875                                 int status = 0;
 876                                 time_t start_wait = time(NULL);
 877                                 res = -1;
 878                                 do {
 879                                         if (waitpid(pid, &status, WNOHANG) == 0 || !WIFEXITED(status)) {
 880                                                 usleep(200000);
 881                                         } else {
 882                                                 res = WEXITSTATUS(status);
 883                                                 break;
 884                                         }
 885                                         if (time(NULL) - start_wait > 5) {
 886                                                 debug_print("SIGTERM'ing gpg\n");
 887                                                 kill(pid, SIGTERM);
 888                                         }
 889                                         if (time(NULL) - start_wait > 6) {
 890                                                 debug_print("SIGKILL'ing gpg\n");
 891                                                 kill(pid, SIGKILL);
 892                                                 break;
 893                                         }
 894                                 } while(1);
 895                         }
 896                         if (res == 0) {
 897                                 alertpanel_notice(_("Key exported."));
 898                         } else {
 899                                 alertpanel_error(_("Couldn't export key."));
 900                         }
 901                         g_free(cmd);
 902 #else
 903                         alertpanel_error(_("Key export isn't implemented in Windows."));
 904 #endif
 905                 }
 906         }
 907         prefs_gpg_get_config()->gpg_ask_create_key = FALSE;
 908         prefs_gpg_save_config();
 909         gpgme_release(ctx);
 910 }
 911
 912 gboolean sgpgme_has_secret_key(void)
 913 {
 914         gpgme_error_t err = 0;
 915         gpgme_ctx_t ctx;
 916         gpgme_key_t key;
 917
 918         err = gpgme_new (&ctx);
 919         if (err) {
 920                 debug_print("err : %s\n", gpgme_strerror(err));
 921                 return TRUE;
 922         }
 923 check_again:
 924         err = gpgme_op_keylist_start(ctx, NULL, TRUE);
 925         if (!err)
 926                 err = gpgme_op_keylist_next(ctx, &key);
 927         gpgme_op_keylist_end(ctx);
 928         if (gpg_err_code(err) == GPG_ERR_EOF) {
 929                 if (gpgme_get_protocol(ctx) != GPGME_PROTOCOL_CMS) {
 930                         gpgme_set_protocol(ctx, GPGME_PROTOCOL_CMS);
 931                         goto check_again;
 932                 }
 933                 gpgme_release(ctx);
 934                 return FALSE;
 935         } else {
 936                 gpgme_release(ctx);
 937                 return TRUE;
 938         }
 939 }
 940
 941 void sgpgme_check_create_key(void)
 942 {
 943         if (prefs_gpg_get_config()->gpg_ask_create_key &&
 944             !sgpgme_has_secret_key()) {
 945                 sgpgme_create_secret_key(NULL, TRUE);
 946         } else {
 947                 prefs_gpg_get_config()->gpg_ask_create_key = FALSE;
 948                 prefs_gpg_save_config();
 949         }
 950 }
 951
 952 void *sgpgme_data_release_and_get_mem(gpgme_data_t data, size_t *len)
 953 {
 954         char buf[BUFSIZ];
 955         void *result = NULL;
 956         ssize_t r = 0;
 957         size_t w = 0;
 958
 959         if (data == NULL)
 960                 return NULL;
 961         if (len == NULL)
 962                 return NULL;
 963
 964         /* I know it's deprecated, but we don't compile with _LARGEFILE */
 965         cm_gpgme_data_rewind(data);
 966         while ((r = gpgme_data_read(data, buf, BUFSIZ)) > 0) {
 967                 result = realloc(result, r + w);
 968                 if (result == NULL) {
 969                         g_warning("can't allocate memory\n");
 970                         return NULL;
 971                 }
 972                 memcpy(result+w, buf, r);
 973                 w += r;
 974         }
 975
 976         *len = w;
 977
 978         gpgme_data_release(data);
 979         if (r < 0) {
 980                 free(result);
 981                 *len = 0;
 982                 return NULL;
 983         }
 984         return result;
 985 }
 986
 987 gpgme_error_t cm_gpgme_data_rewind(gpgme_data_t dh)
 988 {
 989 #if defined(_FILE_OFFSET_BITS) && _FILE_OFFSET_BITS == 64
 990         if (gpgme_data_seek(dh, (off_t)0, SEEK_SET) == -1)
 991                 return gpg_error_from_errno(errno);
 992         else
 993                 return 0;
 994 #else
 995         return gpgme_data_rewind(dh);
 996 #endif
 997 }
 998
 999 #endif /* USE_GPGME */