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 (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                                         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         gchar *tmp_file = NULL;
 400
 401         if (!fp)
 402                 return NULL;
 403
 404         tmp_file = get_tmp_file();
 405         copy_file_part(fp, mimeinfo->offset, mimeinfo->length, tmp_file);
 406         fclose(fp);
 407         fp = NULL;
 408         debug_print("tmp file %s\n", tmp_file);
 409
 410         err = gpgme_data_new_from_file(&data, tmp_file, 1);
 411         claws_unlink(tmp_file);
 412         g_free(tmp_file);
 413
 414         debug_print("data %p (%d %d)\n", (void *)&data, mimeinfo->offset, mimeinfo->length);
 415         if (err) {
 416                 debug_print ("gpgme_data_new_from_file failed: %s\n",
 417                              gpgme_strerror (err));
 418                 privacy_set_error(_("Couldn't get data from message, %s"), gpgme_strerror(err));
 419                 return NULL;
 420         }
 421         return data;
 422 }
 423
 424 gpgme_data_t sgpgme_decrypt_verify(gpgme_data_t cipher, gpgme_verify_result_t *status, gpgme_ctx_t ctx)
 425 {
 426         struct passphrase_cb_info_s info;
 427         gpgme_data_t plain;
 428         gpgme_error_t err;
 429
 430         memset (&info, 0, sizeof info);
 431
 432         if ((err = gpgme_data_new(&plain)) != GPG_ERR_NO_ERROR) {
 433                 gpgme_release(ctx);
 434                 privacy_set_error(_("Couldn't initialize data, %s"), gpgme_strerror(err));
 435                 return NULL;
 436         }
 437
 438         if (gpgme_get_protocol(ctx) == GPGME_PROTOCOL_OpenPGP) {
 439                 prefs_gpg_enable_agent(prefs_gpg_get_config()->use_gpg_agent);
 440                 if (!getenv("GPG_AGENT_INFO") || !prefs_gpg_get_config()->use_gpg_agent) {
 441                         info.c = ctx;
 442                         gpgme_set_passphrase_cb (ctx, gpgmegtk_passphrase_cb, &info);
 443                 }
 444         } else {
 445                 prefs_gpg_enable_agent(TRUE);
 446                 info.c = ctx;
 447                 gpgme_set_passphrase_cb (ctx, NULL, &info);
 448         }
 449
 450
 451         if (gpgme_get_protocol(ctx) == GPGME_PROTOCOL_OpenPGP) {
 452                 err = gpgme_op_decrypt_verify(ctx, cipher, plain);
 453                 if (err != GPG_ERR_NO_ERROR) {
 454                         debug_print("can't decrypt (%s)\n", gpgme_strerror(err));
 455                         privacy_set_error("%s", gpgme_strerror(err));
 456                         gpgmegtk_free_passphrase();
 457                         gpgme_data_release(plain);
 458                         return NULL;
 459                 }
 460
 461                 err = cm_gpgme_data_rewind(plain);
 462                 if (err) {
 463                         debug_print("can't seek (%d %d %s)\n", err, errno, strerror(errno));
 464                 }
 465
 466                 debug_print("decrypted.\n");
 467                 *status = gpgme_op_verify_result (ctx);
 468         } else {
 469                 err = gpgme_op_decrypt(ctx, cipher, plain);
 470                 if (err != GPG_ERR_NO_ERROR) {
 471                         debug_print("can't decrypt (%s)\n", gpgme_strerror(err));
 472                         privacy_set_error("%s", gpgme_strerror(err));
 473                         gpgmegtk_free_passphrase();
 474                         gpgme_data_release(plain);
 475                         return NULL;
 476                 }
 477
 478                 err = cm_gpgme_data_rewind(plain);
 479                 if (err) {
 480                         debug_print("can't seek (%d %d %s)\n", err, errno, strerror(errno));
 481                 }
 482
 483                 debug_print("decrypted.\n");
 484                 *status = gpgme_op_verify_result (ctx);
 485         }
 486         return plain;
 487 }
 488
 489 gchar *sgpgme_get_encrypt_data(GSList *recp_names, gpgme_protocol_t proto)
 490 {
 491         SelectionResult result = KEY_SELECTION_CANCEL;
 492         gpgme_key_t *keys = gpgmegtk_recipient_selection(recp_names, &result,
 493                                 proto);
 494         gchar *ret = NULL;
 495         int i = 0;
 496
 497         if (!keys) {
 498                 if (result == KEY_SELECTION_DONT)
 499                         return g_strdup("_DONT_ENCRYPT_");
 500                 else
 501                         return NULL;
 502         }
 503         while (keys[i]) {
 504                 gpgme_subkey_t skey = keys[i]->subkeys;
 505                 gchar *fpr = skey->fpr;
 506                 gchar *tmp = NULL;
 507                 debug_print("adding %s\n", fpr);
 508                 tmp = g_strconcat(ret?ret:"", fpr, " ", NULL);
 509                 g_free(ret);
 510                 ret = tmp;
 511                 i++;
 512         }
 513         return ret;
 514 }
 515
 516 gboolean sgpgme_setup_signers(gpgme_ctx_t ctx, PrefsAccount *account,
 517                               const gchar *from_addr)
 518 {
 519         GPGAccountConfig *config;
 520         const gchar *signer_addr = account->address;
 521
 522         gpgme_signers_clear(ctx);
 523
 524         if (from_addr)
 525                 signer_addr = from_addr;
 526         config = prefs_gpg_account_get_config(account);
 527
 528         switch(config->sign_key) {
 529         case SIGN_KEY_DEFAULT:
 530                 debug_print("using default gnupg key\n");
 531                 break;
 532         case SIGN_KEY_BY_FROM:
 533                 debug_print("using key for %s\n", signer_addr);
 534                 break;
 535         case SIGN_KEY_CUSTOM:
 536                 debug_print("using key for %s\n", config->sign_key_id);
 537                 break;
 538         }
 539
 540         if (config->sign_key != SIGN_KEY_DEFAULT) {
 541                 const gchar *keyid;
 542                 gpgme_key_t key, found_key;
 543                 gpgme_error_t err;
 544
 545                 if (config->sign_key == SIGN_KEY_BY_FROM)
 546                         keyid = signer_addr;
 547                 else if (config->sign_key == SIGN_KEY_CUSTOM)
 548                         keyid = config->sign_key_id;
 549                 else
 550                         goto bail;
 551
 552                 found_key = NULL;
 553                 /* Look for any key, not just private ones, or GPGMe doesn't
 554                  * correctly set the revoked flag. */
 555                 err = gpgme_op_keylist_start(ctx, keyid, 0);
 556                 while ((err = gpgme_op_keylist_next(ctx, &key)) == 0) {
 557                         if (key == NULL)
 558                                 continue;
 559
 560                         if (!key->can_sign)
 561                                 continue;
 562
 563                         if (key->protocol != gpgme_get_protocol(ctx)) {
 564                                 debug_print("skipping a key (wrong protocol %d)\n", key->protocol);
 565                                 gpgme_key_release(key);
 566                                 continue;
 567                         }
 568
 569                         if (key->expired) {
 570                                 debug_print("skipping a key, expired");
 571                                 gpgme_key_release(key);
 572                                 continue;
 573                         }
 574                         if (key->revoked) {
 575                                 debug_print("skipping a key, revoked");
 576                                 gpgme_key_release(key);
 577                                 continue;
 578                         }
 579                         if (key->disabled) {
 580                                 debug_print("skipping a key, disabled");
 581                                 gpgme_key_release(key);
 582                                 continue;
 583                         }
 584
 585                         if (found_key != NULL) {
 586                                 gpgme_key_release(key);
 587                                 gpgme_op_keylist_end(ctx);
 588                                 g_warning("ambiguous specification of secret key '%s'\n", keyid);
 589                                 privacy_set_error(_("Secret key specification is ambiguous"));
 590                                 goto bail;
 591                         }
 592
 593                         found_key = key;
 594                 }
 595                 gpgme_op_keylist_end(ctx);
 596
 597                 if (found_key == NULL) {
 598                         g_warning("setup_signers start: %s", gpgme_strerror(err));
 599                         privacy_set_error(_("Secret key not found (%s)"), gpgme_strerror(err));
 600                         goto bail;
 601                 }
 602
 603                 err = gpgme_signers_add(ctx, found_key);
 604                 debug_print("got key (proto %d (pgp %d, smime %d).\n",
 605                             found_key->protocol, GPGME_PROTOCOL_OpenPGP,
 606                             GPGME_PROTOCOL_CMS);
 607                 gpgme_key_release(found_key);
 608
 609                 if (err) {
 610                         g_warning("error adding secret key: %s\n",
 611                                   gpgme_strerror(err));
 612                         privacy_set_error(_("Error setting secret key: %s"),
 613                                           gpgme_strerror(err));
 614                         goto bail;
 615                 }
 616         }
 617
 618         prefs_gpg_account_free_config(config);
 619
 620         return TRUE;
 621 bail:
 622         prefs_gpg_account_free_config(config);
 623         return FALSE;
 624 }
 625
 626 void sgpgme_init()
 627 {
 628         gchar *ctype_locale = NULL, *messages_locale = NULL;
 629         gchar *ctype_utf8_locale = NULL, *messages_utf8_locale = NULL;
 630
 631         gpgme_engine_info_t engineInfo;
 632         if (gpgme_check_version("1.0.0")) {
 633 #ifdef LC_CTYPE
 634                 debug_print("setting gpgme CTYPE locale\n");
 635 #ifdef G_OS_WIN32
 636                 ctype_locale = g_win32_getlocale();
 637 #else
 638                 ctype_locale = g_strdup(setlocale(LC_CTYPE, NULL));
 639 #endif
 640                 if (ctype_locale) {
 641                         debug_print("setting gpgme CTYPE locale to: %s\n", ctype_locale);
 642                         if (strchr(ctype_locale, '.'))
 643                                 *(strchr(ctype_locale, '.')) = '\0';
 644                         else if (strchr(ctype_locale, '@'))
 645                                 *(strchr(ctype_locale, '@')) = '\0';
 646                         ctype_utf8_locale = g_strconcat(ctype_locale, ".UTF-8", NULL);
 647
 648                         debug_print("setting gpgme locale to UTF8: %s\n", ctype_utf8_locale ? ctype_utf8_locale : "NULL");
 649                         gpgme_set_locale(NULL, LC_CTYPE, ctype_utf8_locale);
 650
 651                         debug_print("done\n");
 652                         g_free(ctype_utf8_locale);
 653                         g_free(ctype_locale);
 654                 } else {
 655                         debug_print("couldn't set gpgme CTYPE locale\n");
 656                 }
 657 #endif
 658 #ifdef LC_MESSAGES
 659                 debug_print("setting gpgme MESSAGES locale\n");
 660 #ifdef G_OS_WIN32
 661                 messages_locale = g_win32_getlocale();
 662 #else
 663                 messages_locale = g_strdup(setlocale(LC_MESSAGES, NULL));
 664 #endif
 665                 if (messages_locale) {
 666                         debug_print("setting gpgme MESSAGES locale to: %s\n", messages_locale);
 667                         if (strchr(messages_locale, '.'))
 668                                 *(strchr(messages_locale, '.')) = '\0';
 669                         else if (strchr(messages_locale, '@'))
 670                                 *(strchr(messages_locale, '@')) = '\0';
 671                         messages_utf8_locale = g_strconcat(messages_locale, ".UTF-8", NULL);
 672                         debug_print("setting gpgme locale to UTF8: %s\n", messages_utf8_locale ? messages_utf8_locale : "NULL");
 673
 674                         gpgme_set_locale(NULL, LC_MESSAGES, messages_utf8_locale);
 675
 676                         debug_print("done\n");
 677                         g_free(messages_utf8_locale);
 678                         g_free(messages_locale);
 679                 } else {
 680                         debug_print("couldn't set gpgme MESSAGES locale\n");
 681                 }
 682 #endif
 683                 if (!gpgme_get_engine_info(&engineInfo)) {
 684                         while (engineInfo) {
 685                                 debug_print("GpgME Protocol: %s\n"
 686                                             "Version: %s (req %s)\n"
 687                                             "Executable: %s\n",
 688                                         gpgme_get_protocol_name(engineInfo->protocol) ? gpgme_get_protocol_name(engineInfo->protocol):"???",
 689                                         engineInfo->version ? engineInfo->version:"???",
 690                                         engineInfo->req_version ? engineInfo->req_version:"???",
 691                                         engineInfo->file_name ? engineInfo->file_name:"???");
 692                                 if (engineInfo->protocol == GPGME_PROTOCOL_OpenPGP
 693                                 &&  gpgme_engine_check_version(engineInfo->protocol) !=
 694                                         GPG_ERR_NO_ERROR) {
 695                                         if (engineInfo->file_name && !engineInfo->version) {
 696                                                 alertpanel_error(_("Gpgme protocol '%s' is unusable: "
 697                                                                    "Engine '%s' isn't installed properly."),
 698                                                                    gpgme_get_protocol_name(engineInfo->protocol),
 699                                                                    engineInfo->file_name);
 700                                         } else if (engineInfo->file_name && engineInfo->version
 701                                           && engineInfo->req_version) {
 702                                                 alertpanel_error(_("Gpgme protocol '%s' is unusable: "
 703                                                                    "Engine '%s' version %s is installed, "
 704                                                                    "but version %s is required.\n"),
 705                                                                    gpgme_get_protocol_name(engineInfo->protocol),
 706                                                                    engineInfo->file_name,
 707                                                                    engineInfo->version,
 708                                                                    engineInfo->req_version);
 709                                         } else {
 710                                                 alertpanel_error(_("Gpgme protocol '%s' is unusable "
 711                                                                    "(unknown problem)"),
 712                                                                    gpgme_get_protocol_name(engineInfo->protocol));
 713                                         }
 714                                 }
 715                                 engineInfo = engineInfo->next;
 716                         }
 717                 }
 718         } else {
 719                 sgpgme_disable_all();
 720
 721                 if (prefs_gpg_get_config()->gpg_warning) {
 722                         AlertValue val;
 723
 724                         val = alertpanel_full
 725                                 (_("Warning"),
 726                                  _("GnuPG is not installed properly, or needs "
 727                                  "to be upgraded.\n"
 728                                  "OpenPGP support disabled."),
 729                                  GTK_STOCK_CLOSE, NULL, NULL, TRUE, NULL,
 730                                  ALERT_WARNING, G_ALERTDEFAULT);
 731                         if (val & G_ALERTDISABLE)
 732                                 prefs_gpg_get_config()->gpg_warning = FALSE;
 733                 }
 734         }
 735 }
 736
 737 void sgpgme_done()
 738 {
 739         gpgmegtk_free_passphrase();
 740 }
 741
 742 void sgpgme_create_secret_key(PrefsAccount *account, gboolean ask_create)
 743 {
 744         AlertValue val = G_ALERTDEFAULT;
 745         gchar *key_parms = NULL;
 746         gchar *name = NULL;
 747         gchar *email = NULL;
 748         gchar *passphrase = NULL, *passphrase_second = NULL;
 749         gint prev_bad = 0;
 750         gchar *tmp = NULL;
 751         gpgme_error_t err = 0;
 752         gpgme_ctx_t ctx;
 753         GtkWidget *window = NULL;
 754         gpgme_genkey_result_t key;
 755
 756         if (account == NULL)
 757                 account = account_get_default();
 758
 759         if (account->address == NULL) {
 760                 alertpanel_error(_("You have to save the account's information with \"OK\" "
 761                                    "before being able to generate a key pair.\n"));
 762                 return;
 763         }
 764         if (ask_create) {
 765                 val = alertpanel(_("No PGP key found"),
 766                                 _("Claws Mail did not find a secret PGP key, "
 767                                   "which means that you won't be able to sign "
 768                                   "emails or receive encrypted emails.\n"
 769                                   "Do you want to create a new key pair now?"),
 770                                   GTK_STOCK_NO, "+" GTK_STOCK_YES, NULL);
 771                 if (val == G_ALERTDEFAULT) {
 772                         prefs_gpg_get_config()->gpg_ask_create_key = FALSE;
 773                         prefs_gpg_save_config();
 774                         return;
 775                 }
 776         }
 777
 778         if (account->name) {
 779                 name = g_strdup(account->name);
 780         } else {
 781                 name = g_strdup(account->address);
 782         }
 783         email = g_strdup(account->address);
 784         tmp = g_strdup_printf("%s <%s>", account->name?account->name:account->address, account->address);
 785 again:
 786         passphrase = passphrase_mbox(tmp, NULL, prev_bad, 1);
 787         if (passphrase == NULL) {
 788                 g_free(tmp);
 789                 g_free(email);
 790                 g_free(name);
 791                 return;
 792         }
 793         passphrase_second = passphrase_mbox(tmp, NULL, 0, 2);
 794         if (passphrase_second == NULL) {
 795                 g_free(tmp);
 796                 g_free(email);
 797                 g_free(passphrase);
 798                 g_free(name);
 799                 return;
 800         }
 801         if (strcmp(passphrase, passphrase_second)) {
 802                 g_free(passphrase);
 803                 g_free(passphrase_second);
 804                 prev_bad = 1;
 805                 goto again;
 806         }
 807
 808         key_parms = g_strdup_printf("<GnupgKeyParms format=\"internal\">\n"
 809                                         "Key-Type: RSA\n"
 810                                         "Key-Length: 2048\n"
 811                                         "Subkey-Type: RSA\n"
 812                                         "Subkey-Length: 2048\n"
 813                                         "Name-Real: %s\n"
 814                                         "Name-Email: %s\n"
 815                                         "Expire-Date: 0\n"
 816                                         "%s%s%s"
 817                                         "</GnupgKeyParms>\n",
 818                                         name, email,
 819                                         strlen(passphrase)?"Passphrase: ":"",
 820                                         passphrase,
 821                                         strlen(passphrase)?"\n":"");
 822 #ifndef G_PLATFORM_WIN32
 823         if (mlock(passphrase, strlen(passphrase)) == -1)
 824                 debug_print("couldn't lock passphrase\n");
 825         if (mlock(passphrase_second, strlen(passphrase_second)) == -1)
 826                 debug_print("couldn't lock passphrase2\n");
 827 #endif
 828         g_free(tmp);
 829         g_free(email);
 830         g_free(name);
 831         g_free(passphrase_second);
 832         g_free(passphrase);
 833
 834         err = gpgme_new (&ctx);
 835         if (err) {
 836                 alertpanel_error(_("Couldn't generate a new key pair: %s"),
 837                                  gpgme_strerror(err));
 838                 g_free(key_parms);
 839                 return;
 840         }
 841
 842
 843         window = label_window_create(_("Generating your new key pair... Please move the mouse "
 844                               "around to help generate entropy..."));
 845
 846         err = gpgme_op_genkey(ctx, key_parms, NULL, NULL);
 847         g_free(key_parms);
 848
 849         label_window_destroy(window);
 850
 851         if (err) {
 852                 alertpanel_error(_("Couldn't generate a new key pair: %s"), gpgme_strerror(err));
 853                 gpgme_release(ctx);
 854                 return;
 855         }
 856         key = gpgme_op_genkey_result(ctx);
 857         if (key == NULL) {
 858                 alertpanel_error(_("Couldn't generate a new key pair: unknown error"));
 859                 gpgme_release(ctx);
 860                 return;
 861         } else {
 862                 gchar *buf = g_strdup_printf(_("Your new key pair has been generated. "
 863                                     "Its fingerprint is:\n%s\n\nDo you want to export it "
 864                                     "to a keyserver?"),
 865                                     key->fpr ? key->fpr:"null");
 866                 AlertValue val = alertpanel(_("Key generated"), buf,
 867                                   GTK_STOCK_NO, "+" GTK_STOCK_YES, NULL);
 868                 g_free(buf);
 869                 if (val == G_ALERTALTERNATE) {
 870 #ifndef G_OS_WIN32
 871                         gchar *cmd = g_strdup_printf("gpg --no-tty --send-keys %s", key->fpr);
 872                         int res = 0;
 873                         pid_t pid = 0;
 874                         pid = fork();
 875                         if (pid == -1) {
 876                                 res = -1;
 877                         } else if (pid == 0) {
 878                                 /* son */
 879                                 res = system(cmd);
 880                                 res = WEXITSTATUS(res);
 881                                 _exit(res);
 882                         } else {
 883                                 int status = 0;
 884                                 time_t start_wait = time(NULL);
 885                                 res = -1;
 886                                 do {
 887                                         if (waitpid(pid, &status, WNOHANG) == 0 || !WIFEXITED(status)) {
 888                                                 usleep(200000);
 889                                         } else {
 890                                                 res = WEXITSTATUS(status);
 891                                                 break;
 892                                         }
 893                                         if (time(NULL) - start_wait > 5) {
 894                                                 debug_print("SIGTERM'ing gpg\n");
 895                                                 kill(pid, SIGTERM);
 896                                         }
 897                                         if (time(NULL) - start_wait > 6) {
 898                                                 debug_print("SIGKILL'ing gpg\n");
 899                                                 kill(pid, SIGKILL);
 900                                                 break;
 901                                         }
 902                                 } while(1);
 903                         }
 904                         if (res == 0) {
 905                                 alertpanel_notice(_("Key exported."));
 906                         } else {
 907                                 alertpanel_error(_("Couldn't export key."));
 908                         }
 909                         g_free(cmd);
 910 #else
 911                         alertpanel_error(_("Key export isn't implemented in Windows."));
 912 #endif
 913                 }
 914         }
 915         prefs_gpg_get_config()->gpg_ask_create_key = FALSE;
 916         prefs_gpg_save_config();
 917         gpgme_release(ctx);
 918 }
 919
 920 gboolean sgpgme_has_secret_key(void)
 921 {
 922         gpgme_error_t err = 0;
 923         gpgme_ctx_t ctx;
 924         gpgme_key_t key;
 925
 926         err = gpgme_new (&ctx);
 927         if (err) {
 928                 debug_print("err : %s\n", gpgme_strerror(err));
 929                 return TRUE;
 930         }
 931 check_again:
 932         err = gpgme_op_keylist_start(ctx, NULL, TRUE);
 933         if (!err)
 934                 err = gpgme_op_keylist_next(ctx, &key);
 935         gpgme_op_keylist_end(ctx);
 936         if (gpg_err_code(err) == GPG_ERR_EOF) {
 937                 if (gpgme_get_protocol(ctx) != GPGME_PROTOCOL_CMS) {
 938                         gpgme_set_protocol(ctx, GPGME_PROTOCOL_CMS);
 939                         goto check_again;
 940                 }
 941                 gpgme_release(ctx);
 942                 return FALSE;
 943         } else {
 944                 gpgme_release(ctx);
 945                 return TRUE;
 946         }
 947 }
 948
 949 void sgpgme_check_create_key(void)
 950 {
 951         if (prefs_gpg_get_config()->gpg_ask_create_key &&
 952             !sgpgme_has_secret_key()) {
 953                 sgpgme_create_secret_key(NULL, TRUE);
 954         } else {
 955                 prefs_gpg_get_config()->gpg_ask_create_key = FALSE;
 956                 prefs_gpg_save_config();
 957         }
 958 }
 959
 960 void *sgpgme_data_release_and_get_mem(gpgme_data_t data, size_t *len)
 961 {
 962         char buf[BUFSIZ];
 963         void *result = NULL;
 964         ssize_t r = 0;
 965         size_t w = 0;
 966
 967         if (data == NULL)
 968                 return NULL;
 969         if (len == NULL)
 970                 return NULL;
 971
 972         /* I know it's deprecated, but we don't compile with _LARGEFILE */
 973         cm_gpgme_data_rewind(data);
 974         while ((r = gpgme_data_read(data, buf, BUFSIZ)) > 0) {
 975                 result = realloc(result, r + w);
 976                 if (result == NULL) {
 977                         g_warning("can't allocate memory\n");
 978                         return NULL;
 979                 }
 980                 memcpy(result+w, buf, r);
 981                 w += r;
 982         }
 983
 984         *len = w;
 985
 986         gpgme_data_release(data);
 987         if (r < 0) {
 988                 free(result);
 989                 *len = 0;
 990                 return NULL;
 991         }
 992         return result;
 993 }
 994
 995 gpgme_error_t cm_gpgme_data_rewind(gpgme_data_t dh)
 996 {
 997 #if defined(_FILE_OFFSET_BITS) && _FILE_OFFSET_BITS == 64
 998         if (gpgme_data_seek(dh, (off_t)0, SEEK_SET) == -1)
 999                 return gpg_error_from_errno(errno);
1000         else
1001                 return 0;
1002 #else
1003         return gpgme_data_rewind(dh);
1004 #endif
1005 }
1006
1007 #endif /* USE_GPGME */