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         gpgme_user_id_t user = NULL;
 194         gchar *uname = NULL;
 195         gpgme_key_t key;
 196         gchar *result = NULL;
 197         gpgme_error_t err = 0;
 198         static gboolean warned = FALSE;
 199
 200         if (GPOINTER_TO_INT(status) == -GPG_ERR_SYSTEM_ERROR) {
 201                 return g_strdup_printf(_("The signature can't be checked - %s"), privacy_get_error());
 202         }
 203
 204         if (status == NULL) {
 205                 return g_strdup(_("The signature has not been checked."));
 206         }
 207         sig = status->signatures;
 208         if (sig == NULL) {
 209                 return g_strdup(_("The signature has not been checked."));
 210         }
 211
 212         err = gpgme_get_key(ctx, sig->fpr, &key, 0);
 213         if (gpg_err_code(err) == GPG_ERR_NO_AGENT) {
 214                 if (!warned)
 215                         alertpanel_error(_("PGP Core: Can't get key - no gpg-agent running."));
 216                 else
 217                         g_warning(_("PGP Core: Can't get key - no gpg-agent running."));
 218                 warned = TRUE;
 219         } else if (gpg_err_code(err) != GPG_ERR_NO_ERROR && gpg_err_code(err) != GPG_ERR_EOF) {
 220                 return g_strdup_printf(_("The signature can't be checked - %s"),
 221                         gpgme_strerror(err));
 222         }
 223         if (key) {
 224                 user = key->uids;
 225                 uname = extract_name(key->uids->uid);
 226         } else
 227                 uname = g_strdup("<?>");
 228
 229         switch (gpg_err_code(sig->status)) {
 230         case GPG_ERR_NO_ERROR:
 231                switch (user->validity) {
 232                 case GPGME_VALIDITY_ULTIMATE:
 233                         result = g_strdup_printf(_("Good signature from \"%s\" [ultimate]"), uname);
 234                         break;
 235                 case GPGME_VALIDITY_FULL:
 236                         result = g_strdup_printf(_("Good signature from \"%s\" [full]"), uname);
 237                         break;
 238                 case GPGME_VALIDITY_MARGINAL:
 239                         result = g_strdup_printf(_("Good signature from \"%s\" [marginal]"), uname);
 240                         break;
 241                 case GPGME_VALIDITY_UNKNOWN:
 242                 case GPGME_VALIDITY_UNDEFINED:
 243                 case GPGME_VALIDITY_NEVER:
 244                 default:
 245                         result = g_strdup_printf(_("Good signature from \"%s\""), uname);
 246                         break;
 247                }
 248                 break;
 249         case GPG_ERR_SIG_EXPIRED:
 250                 result = g_strdup_printf(_("Expired signature from \"%s\""), uname);
 251                 break;
 252         case GPG_ERR_KEY_EXPIRED:
 253                 result = g_strdup_printf(_("Good signature from \"%s\", but the key has expired"), uname);
 254                 break;
 255         case GPG_ERR_CERT_REVOKED:
 256                 result = g_strdup_printf(_("Good signature from \"%s\", but the key has been revoked"), uname);
 257                 break;
 258         case GPG_ERR_BAD_SIGNATURE:
 259                 result = g_strdup_printf(_("Bad signature from \"%s\""), uname);
 260                 break;
 261         case GPG_ERR_NO_PUBKEY: {
 262                 gchar *id = g_strdup(sig->fpr + strlen(sig->fpr)-8);
 263                 result = g_strdup_printf(_("Key 0x%s not available to verify this signature"), id);
 264                 g_free(id);
 265                 break;
 266                 }
 267         default:
 268                 result = g_strdup(_("The signature has not been checked"));
 269                 break;
 270         }
 271         if (result == NULL)
 272                 result = g_strdup(_("Error"));
 273         g_free(uname);
 274         return result;
 275 }
 276
 277 gchar *sgpgme_sigstat_info_full(gpgme_ctx_t ctx, gpgme_verify_result_t status)
 278 {
 279         gint i = 0;
 280         gchar *ret;
 281         GString *siginfo;
 282         gpgme_signature_t sig = NULL;
 283
 284         siginfo = g_string_sized_new(64);
 285         if (status == NULL) {
 286                 g_string_append_printf(siginfo,
 287                         _("Error checking signature: no status\n"));
 288                 goto bail;
 289          }
 290
 291         sig = status->signatures;
 292
 293         while (sig) {
 294                 char buf[100];
 295                 struct tm lt;
 296                 gpgme_user_id_t user = NULL;
 297                 gpgme_key_t key;
 298                 gpgme_error_t err;
 299                 const gchar *keytype, *keyid, *uid;
 300
 301                 err = gpgme_get_key(ctx, sig->fpr, &key, 0);
 302
 303                 if (err != GPG_ERR_NO_ERROR) {
 304                         key = NULL;
 305                         g_string_append_printf(siginfo,
 306                                 _("Error checking signature: %s\n"),
 307                                 gpgme_strerror(err));
 308                         goto bail;
 309                 }
 310                 if (key) {
 311                         user = key->uids;
 312                         keytype = gpgme_pubkey_algo_name(
 313                                         key->subkeys->pubkey_algo);
 314                         keyid = key->subkeys->keyid;
 315                         uid = user->uid;
 316                 } else {
 317                         keytype = "?";
 318                         keyid = "?";
 319                         uid = "?";
 320                 }
 321
 322                 memset(buf, 0, sizeof(buf));
 323                 fast_strftime(buf, sizeof(buf)-1, prefs_common_get_prefs()->date_format, localtime_r(&sig->timestamp, &lt));
 324                 g_string_append_printf(siginfo,
 325                         _("Signature made on %s using %s key ID %s\n"),
 326                         buf, keytype, keyid);
 327
 328                 switch (gpg_err_code(sig->status)) {
 329                 case GPG_ERR_NO_ERROR:
 330                         g_string_append_printf(siginfo,
 331                                 _("Good signature from uid \"%s\" (Validity: %s)\n"),
 332                                 uid, get_validity_str(user?user->validity:GPGME_VALIDITY_UNKNOWN));
 333                         break;
 334                 case GPG_ERR_KEY_EXPIRED:
 335                         g_string_append_printf(siginfo,
 336                                 _("Expired key uid \"%s\"\n"),
 337                                 uid);
 338                         break;
 339                 case GPG_ERR_SIG_EXPIRED:
 340                         g_string_append_printf(siginfo,
 341                                 _("Expired signature from uid \"%s\" (Validity: %s)\n"),
 342                                 uid, get_validity_str(user?user->validity:GPGME_VALIDITY_UNKNOWN));
 343                         break;
 344                 case GPG_ERR_CERT_REVOKED:
 345                         g_string_append_printf(siginfo,
 346                                 _("Revoked key uid \"%s\"\n"),
 347                                 uid);
 348                         break;
 349                 case GPG_ERR_BAD_SIGNATURE:
 350                         g_string_append_printf(siginfo,
 351                                 _("BAD signature from \"%s\"\n"),
 352                                 uid);
 353                         break;
 354                 default:
 355                         break;
 356                 }
 357                 if (sig->status != GPG_ERR_BAD_SIGNATURE) {
 358                         gint j = 1;
 359                         user = user ? user->next : NULL;
 360                         while (user != NULL) {
 361                                 g_string_append_printf(siginfo,
 362                                         _("                    uid \"%s\" (Validity: %s)\n"),
 363                                         user->uid,
 364                                         user->revoked==TRUE?_("Revoked"):get_validity_str(user->validity));
 365                                 j++;
 366                                 user = user->next;
 367                         }
 368                         g_string_append_printf(siginfo,_("Owner Trust: %s\n"),
 369                                                get_owner_trust_str(key->owner_trust));
 370                         g_string_append(siginfo,
 371                                 _("Primary key fingerprint:"));
 372                         const char* primary_fpr = NULL;
 373                         if (key && key->subkeys && key->subkeys->fpr)
 374                                 primary_fpr = key->subkeys->fpr;
 375                         else
 376                                 g_string_append(siginfo, " ?");
 377                         int idx; /* now pretty-print the fingerprint */
 378                         for (idx=0; primary_fpr && *primary_fpr!='\0'; idx++, primary_fpr++) {
 379                                 if (idx%4==0)
 380                                         g_string_append_c(siginfo, ' ');
 381                                 if (idx%20==0)
 382                                         g_string_append_c(siginfo, ' ');
 383                                 g_string_append_c(siginfo, (gchar)*primary_fpr);
 384                         }
 385                         g_string_append_c(siginfo, '\n');
 386 #ifdef HAVE_GPGME_PKA_TRUST
 387                         if (sig->pka_trust == 1 && sig->pka_address) {
 388                                 g_string_append_printf(siginfo,
 389                                    _("WARNING: Signer's address \"%s\" "
 390                                       "does not match DNS entry\n"),
 391                                    sig->pka_address);
 392                         }
 393                         else if (sig->pka_trust == 2 && sig->pka_address) {
 394                                 g_string_append_printf(siginfo,
 395                                    _("Verified signer's address is \"%s\"\n"),
 396                                    sig->pka_address);
 397                                 /* FIXME: Compare the address to the
 398                                  * From: address.  */
 399                         }
 400 #endif /*HAVE_GPGME_PKA_TRUST*/
 401                 }
 402
 403                 g_string_append(siginfo, "\n");
 404                 i++;
 405                 sig = sig->next;
 406         }
 407 bail:
 408         ret = siginfo->str;
 409         g_string_free(siginfo, FALSE);
 410         return ret;
 411 }
 412
 413 gpgme_data_t sgpgme_data_from_mimeinfo(MimeInfo *mimeinfo)
 414 {
 415         gpgme_data_t data = NULL;
 416         gpgme_error_t err;
 417         FILE *fp = g_fopen(mimeinfo->data.filename, "rb");
 418
 419         if (!fp)
 420                 return NULL;
 421
 422         err = gpgme_data_new_from_filepart(&data, NULL, fp, mimeinfo->offset, mimeinfo->length);
 423         fclose(fp);
 424
 425         debug_print("data %p (%d %d)\n", (void *)&data, mimeinfo->offset, mimeinfo->length);
 426         if (err) {
 427                 debug_print ("gpgme_data_new_from_file failed: %s\n",
 428                              gpgme_strerror (err));
 429                 privacy_set_error(_("Couldn't get data from message, %s"), gpgme_strerror(err));
 430                 return NULL;
 431         }
 432         return data;
 433 }
 434
 435 gpgme_data_t sgpgme_decrypt_verify(gpgme_data_t cipher, gpgme_verify_result_t *status, gpgme_ctx_t ctx)
 436 {
 437         struct passphrase_cb_info_s info;
 438         gpgme_data_t plain;
 439         gpgme_error_t err;
 440
 441         memset (&info, 0, sizeof info);
 442
 443         if ((err = gpgme_data_new(&plain)) != GPG_ERR_NO_ERROR) {
 444                 gpgme_release(ctx);
 445                 privacy_set_error(_("Couldn't initialize data, %s"), gpgme_strerror(err));
 446                 return NULL;
 447         }
 448
 449         if (gpgme_get_protocol(ctx) == GPGME_PROTOCOL_OpenPGP) {
 450                 prefs_gpg_enable_agent(prefs_gpg_get_config()->use_gpg_agent);
 451                 if (!getenv("GPG_AGENT_INFO") || !prefs_gpg_get_config()->use_gpg_agent) {
 452                         info.c = ctx;
 453                         gpgme_set_passphrase_cb (ctx, gpgmegtk_passphrase_cb, &info);
 454                 }
 455         } else {
 456                 prefs_gpg_enable_agent(TRUE);
 457                 info.c = ctx;
 458                 gpgme_set_passphrase_cb (ctx, NULL, &info);
 459         }
 460
 461
 462         if (gpgme_get_protocol(ctx) == GPGME_PROTOCOL_OpenPGP) {
 463                 err = gpgme_op_decrypt_verify(ctx, cipher, plain);
 464                 if (err != GPG_ERR_NO_ERROR) {
 465                         debug_print("can't decrypt (%s)\n", gpgme_strerror(err));
 466                         privacy_set_error("%s", gpgme_strerror(err));
 467                         gpgmegtk_free_passphrase();
 468                         gpgme_data_release(plain);
 469                         return NULL;
 470                 }
 471
 472                 err = cm_gpgme_data_rewind(plain);
 473                 if (err) {
 474                         debug_print("can't seek (%d %d %s)\n", err, errno, strerror(errno));
 475                 }
 476
 477                 debug_print("decrypted.\n");
 478                 *status = gpgme_op_verify_result (ctx);
 479         } else {
 480                 err = gpgme_op_decrypt(ctx, cipher, plain);
 481                 if (err != GPG_ERR_NO_ERROR) {
 482                         debug_print("can't decrypt (%s)\n", gpgme_strerror(err));
 483                         privacy_set_error("%s", gpgme_strerror(err));
 484                         gpgmegtk_free_passphrase();
 485                         gpgme_data_release(plain);
 486                         return NULL;
 487                 }
 488
 489                 err = cm_gpgme_data_rewind(plain);
 490                 if (err) {
 491                         debug_print("can't seek (%d %d %s)\n", err, errno, strerror(errno));
 492                 }
 493
 494                 debug_print("decrypted.\n");
 495                 *status = gpgme_op_verify_result (ctx);
 496         }
 497         return plain;
 498 }
 499
 500 gchar *sgpgme_get_encrypt_data(GSList *recp_names, gpgme_protocol_t proto)
 501 {
 502         SelectionResult result = KEY_SELECTION_CANCEL;
 503         gpgme_key_t *keys = gpgmegtk_recipient_selection(recp_names, &result,
 504                                 proto);
 505         gchar *ret = NULL;
 506         int i = 0;
 507
 508         if (!keys) {
 509                 if (result == KEY_SELECTION_DONT)
 510                         return g_strdup("_DONT_ENCRYPT_");
 511                 else
 512                         return NULL;
 513         }
 514         while (keys[i]) {
 515                 gpgme_subkey_t skey = keys[i]->subkeys;
 516                 gchar *fpr = skey->fpr;
 517                 gchar *tmp = NULL;
 518                 debug_print("adding %s\n", fpr);
 519                 tmp = g_strconcat(ret?ret:"", fpr, " ", NULL);
 520                 g_free(ret);
 521                 ret = tmp;
 522                 i++;
 523         }
 524         return ret;
 525 }
 526
 527 gboolean sgpgme_setup_signers(gpgme_ctx_t ctx, PrefsAccount *account,
 528                               const gchar *from_addr)
 529 {
 530         GPGAccountConfig *config;
 531         const gchar *signer_addr = account->address;
 532
 533         gpgme_signers_clear(ctx);
 534
 535         if (from_addr)
 536                 signer_addr = from_addr;
 537         config = prefs_gpg_account_get_config(account);
 538
 539         switch(config->sign_key) {
 540         case SIGN_KEY_DEFAULT:
 541                 debug_print("using default gnupg key\n");
 542                 break;
 543         case SIGN_KEY_BY_FROM:
 544                 debug_print("using key for %s\n", signer_addr);
 545                 break;
 546         case SIGN_KEY_CUSTOM:
 547                 debug_print("using key for %s\n", config->sign_key_id);
 548                 break;
 549         }
 550
 551         if (config->sign_key != SIGN_KEY_DEFAULT) {
 552                 const gchar *keyid;
 553                 gpgme_key_t key, found_key;
 554                 gpgme_error_t err;
 555
 556                 if (config->sign_key == SIGN_KEY_BY_FROM)
 557                         keyid = signer_addr;
 558                 else if (config->sign_key == SIGN_KEY_CUSTOM)
 559                         keyid = config->sign_key_id;
 560                 else
 561                         goto bail;
 562
 563                 found_key = NULL;
 564                 /* Look for any key, not just private ones, or GPGMe doesn't
 565                  * correctly set the revoked flag. */
 566                 err = gpgme_op_keylist_start(ctx, keyid, 0);
 567                 while ((err = gpgme_op_keylist_next(ctx, &key)) == 0) {
 568                         if (key == NULL)
 569                                 continue;
 570
 571                         if (!key->can_sign)
 572                                 continue;
 573
 574                         if (key->protocol != gpgme_get_protocol(ctx)) {
 575                                 debug_print("skipping a key (wrong protocol %d)\n", key->protocol);
 576                                 gpgme_key_release(key);
 577                                 continue;
 578                         }
 579
 580                         if (key->expired) {
 581                                 debug_print("skipping a key, expired");
 582                                 gpgme_key_release(key);
 583                                 continue;
 584                         }
 585                         if (key->revoked) {
 586                                 debug_print("skipping a key, revoked");
 587                                 gpgme_key_release(key);
 588                                 continue;
 589                         }
 590                         if (key->disabled) {
 591                                 debug_print("skipping a key, disabled");
 592                                 gpgme_key_release(key);
 593                                 continue;
 594                         }
 595
 596                         if (found_key != NULL) {
 597                                 gpgme_key_release(key);
 598                                 gpgme_op_keylist_end(ctx);
 599                                 g_warning("ambiguous specification of secret key '%s'\n", keyid);
 600                                 privacy_set_error(_("Secret key specification is ambiguous"));
 601                                 goto bail;
 602                         }
 603
 604                         found_key = key;
 605                 }
 606                 gpgme_op_keylist_end(ctx);
 607
 608                 if (found_key == NULL) {
 609                         g_warning("setup_signers start: %s", gpgme_strerror(err));
 610                         privacy_set_error(_("Secret key not found (%s)"), gpgme_strerror(err));
 611                         goto bail;
 612                 }
 613
 614                 err = gpgme_signers_add(ctx, found_key);
 615                 debug_print("got key (proto %d (pgp %d, smime %d).\n",
 616                             found_key->protocol, GPGME_PROTOCOL_OpenPGP,
 617                             GPGME_PROTOCOL_CMS);
 618                 gpgme_key_release(found_key);
 619
 620                 if (err) {
 621                         g_warning("error adding secret key: %s\n",
 622                                   gpgme_strerror(err));
 623                         privacy_set_error(_("Error setting secret key: %s"),
 624                                           gpgme_strerror(err));
 625                         goto bail;
 626                 }
 627         }
 628
 629         prefs_gpg_account_free_config(config);
 630
 631         return TRUE;
 632 bail:
 633         prefs_gpg_account_free_config(config);
 634         return FALSE;
 635 }
 636
 637 void sgpgme_init()
 638 {
 639         gchar *ctype_locale = NULL, *messages_locale = NULL;
 640         gchar *ctype_utf8_locale = NULL, *messages_utf8_locale = NULL;
 641
 642         gpgme_engine_info_t engineInfo;
 643         if (gpgme_check_version("1.0.0")) {
 644 #ifdef LC_CTYPE
 645                 debug_print("setting gpgme CTYPE locale\n");
 646 #ifdef G_OS_WIN32
 647                 ctype_locale = g_win32_getlocale();
 648 #else
 649                 ctype_locale = g_strdup(setlocale(LC_CTYPE, NULL));
 650 #endif
 651                 if (ctype_locale) {
 652                         debug_print("setting gpgme CTYPE locale to: %s\n", ctype_locale);
 653                         if (strchr(ctype_locale, '.'))
 654                                 *(strchr(ctype_locale, '.')) = '\0';
 655                         else if (strchr(ctype_locale, '@'))
 656                                 *(strchr(ctype_locale, '@')) = '\0';
 657                         ctype_utf8_locale = g_strconcat(ctype_locale, ".UTF-8", NULL);
 658
 659                         debug_print("setting gpgme locale to UTF8: %s\n", ctype_utf8_locale ? ctype_utf8_locale : "NULL");
 660                         gpgme_set_locale(NULL, LC_CTYPE, ctype_utf8_locale);
 661
 662                         debug_print("done\n");
 663                         g_free(ctype_utf8_locale);
 664                         g_free(ctype_locale);
 665                 } else {
 666                         debug_print("couldn't set gpgme CTYPE locale\n");
 667                 }
 668 #endif
 669 #ifdef LC_MESSAGES
 670                 debug_print("setting gpgme MESSAGES locale\n");
 671 #ifdef G_OS_WIN32
 672                 messages_locale = g_win32_getlocale();
 673 #else
 674                 messages_locale = g_strdup(setlocale(LC_MESSAGES, NULL));
 675 #endif
 676                 if (messages_locale) {
 677                         debug_print("setting gpgme MESSAGES locale to: %s\n", messages_locale);
 678                         if (strchr(messages_locale, '.'))
 679                                 *(strchr(messages_locale, '.')) = '\0';
 680                         else if (strchr(messages_locale, '@'))
 681                                 *(strchr(messages_locale, '@')) = '\0';
 682                         messages_utf8_locale = g_strconcat(messages_locale, ".UTF-8", NULL);
 683                         debug_print("setting gpgme locale to UTF8: %s\n", messages_utf8_locale ? messages_utf8_locale : "NULL");
 684
 685                         gpgme_set_locale(NULL, LC_MESSAGES, messages_utf8_locale);
 686
 687                         debug_print("done\n");
 688                         g_free(messages_utf8_locale);
 689                         g_free(messages_locale);
 690                 } else {
 691                         debug_print("couldn't set gpgme MESSAGES locale\n");
 692                 }
 693 #endif
 694                 if (!gpgme_get_engine_info(&engineInfo)) {
 695                         while (engineInfo) {
 696                                 debug_print("GpgME Protocol: %s\n"
 697                                             "Version: %s (req %s)\n"
 698                                             "Executable: %s\n",
 699                                         gpgme_get_protocol_name(engineInfo->protocol) ? gpgme_get_protocol_name(engineInfo->protocol):"???",
 700                                         engineInfo->version ? engineInfo->version:"???",
 701                                         engineInfo->req_version ? engineInfo->req_version:"???",
 702                                         engineInfo->file_name ? engineInfo->file_name:"???");
 703                                 if (engineInfo->protocol == GPGME_PROTOCOL_OpenPGP
 704                                 &&  gpgme_engine_check_version(engineInfo->protocol) !=
 705                                         GPG_ERR_NO_ERROR) {
 706                                         if (engineInfo->file_name && !engineInfo->version) {
 707                                                 alertpanel_error(_("Gpgme protocol '%s' is unusable: "
 708                                                                    "Engine '%s' isn't installed properly."),
 709                                                                    gpgme_get_protocol_name(engineInfo->protocol),
 710                                                                    engineInfo->file_name);
 711                                         } else if (engineInfo->file_name && engineInfo->version
 712                                           && engineInfo->req_version) {
 713                                                 alertpanel_error(_("Gpgme protocol '%s' is unusable: "
 714                                                                    "Engine '%s' version %s is installed, "
 715                                                                    "but version %s is required.\n"),
 716                                                                    gpgme_get_protocol_name(engineInfo->protocol),
 717                                                                    engineInfo->file_name,
 718                                                                    engineInfo->version,
 719                                                                    engineInfo->req_version);
 720                                         } else {
 721                                                 alertpanel_error(_("Gpgme protocol '%s' is unusable "
 722                                                                    "(unknown problem)"),
 723                                                                    gpgme_get_protocol_name(engineInfo->protocol));
 724                                         }
 725                                 }
 726                                 engineInfo = engineInfo->next;
 727                         }
 728                 }
 729         } else {
 730                 sgpgme_disable_all();
 731
 732                 if (prefs_gpg_get_config()->gpg_warning) {
 733                         AlertValue val;
 734
 735                         val = alertpanel_full
 736                                 (_("Warning"),
 737                                  _("GnuPG is not installed properly, or needs "
 738                                  "to be upgraded.\n"
 739                                  "OpenPGP support disabled."),
 740                                  GTK_STOCK_CLOSE, NULL, NULL, TRUE, NULL,
 741                                  ALERT_WARNING, G_ALERTDEFAULT);
 742                         if (val & G_ALERTDISABLE)
 743                                 prefs_gpg_get_config()->gpg_warning = FALSE;
 744                 }
 745         }
 746 }
 747
 748 void sgpgme_done()
 749 {
 750         gpgmegtk_free_passphrase();
 751 }
 752
 753 void sgpgme_create_secret_key(PrefsAccount *account, gboolean ask_create)
 754 {
 755         AlertValue val = G_ALERTDEFAULT;
 756         gchar *key_parms = NULL;
 757         gchar *name = NULL;
 758         gchar *email = NULL;
 759         gchar *passphrase = NULL, *passphrase_second = NULL;
 760         gint prev_bad = 0;
 761         gchar *tmp = NULL;
 762         gpgme_error_t err = 0;
 763         gpgme_ctx_t ctx;
 764         GtkWidget *window = NULL;
 765         gpgme_genkey_result_t key;
 766
 767         if (account == NULL)
 768                 account = account_get_default();
 769
 770         if (account->address == NULL) {
 771                 alertpanel_error(_("You have to save the account's information with \"OK\" "
 772                                    "before being able to generate a key pair.\n"));
 773                 return;
 774         }
 775         if (ask_create) {
 776                 val = alertpanel(_("No PGP key found"),
 777                                 _("Claws Mail did not find a secret PGP key, "
 778                                   "which means that you won't be able to sign "
 779                                   "emails or receive encrypted emails.\n"
 780                                   "Do you want to create a new key pair now?"),
 781                                   GTK_STOCK_NO, "+" GTK_STOCK_YES, NULL);
 782                 if (val == G_ALERTDEFAULT) {
 783                         prefs_gpg_get_config()->gpg_ask_create_key = FALSE;
 784                         prefs_gpg_save_config();
 785                         return;
 786                 }
 787         }
 788
 789         if (account->name) {
 790                 name = g_strdup(account->name);
 791         } else {
 792                 name = g_strdup(account->address);
 793         }
 794         email = g_strdup(account->address);
 795         tmp = g_strdup_printf("%s <%s>", account->name?account->name:account->address, account->address);
 796 again:
 797         passphrase = passphrase_mbox(tmp, NULL, prev_bad, 1);
 798         if (passphrase == NULL) {
 799                 g_free(tmp);
 800                 g_free(email);
 801                 g_free(name);
 802                 return;
 803         }
 804         passphrase_second = passphrase_mbox(tmp, NULL, 0, 2);
 805         if (passphrase_second == NULL) {
 806                 g_free(tmp);
 807                 g_free(email);
 808                 g_free(passphrase);
 809                 g_free(name);
 810                 return;
 811         }
 812         if (strcmp(passphrase, passphrase_second)) {
 813                 g_free(passphrase);
 814                 g_free(passphrase_second);
 815                 prev_bad = 1;
 816                 goto again;
 817         }
 818
 819         key_parms = g_strdup_printf("<GnupgKeyParms format=\"internal\">\n"
 820                                         "Key-Type: RSA\n"
 821                                         "Key-Length: 2048\n"
 822                                         "Subkey-Type: RSA\n"
 823                                         "Subkey-Length: 2048\n"
 824                                         "Name-Real: %s\n"
 825                                         "Name-Email: %s\n"
 826                                         "Expire-Date: 0\n"
 827                                         "%s%s%s"
 828                                         "</GnupgKeyParms>\n",
 829                                         name, email,
 830                                         strlen(passphrase)?"Passphrase: ":"",
 831                                         passphrase,
 832                                         strlen(passphrase)?"\n":"");
 833 #ifndef G_PLATFORM_WIN32
 834         if (mlock(passphrase, strlen(passphrase)) == -1)
 835                 debug_print("couldn't lock passphrase\n");
 836         if (mlock(passphrase_second, strlen(passphrase_second)) == -1)
 837                 debug_print("couldn't lock passphrase2\n");
 838 #endif
 839         g_free(tmp);
 840         g_free(email);
 841         g_free(name);
 842         g_free(passphrase_second);
 843         g_free(passphrase);
 844
 845         err = gpgme_new (&ctx);
 846         if (err) {
 847                 alertpanel_error(_("Couldn't generate a new key pair: %s"),
 848                                  gpgme_strerror(err));
 849                 g_free(key_parms);
 850                 return;
 851         }
 852
 853
 854         window = label_window_create(_("Generating your new key pair... Please move the mouse "
 855                               "around to help generate entropy..."));
 856
 857         err = gpgme_op_genkey(ctx, key_parms, NULL, NULL);
 858         g_free(key_parms);
 859
 860         label_window_destroy(window);
 861
 862         if (err) {
 863                 alertpanel_error(_("Couldn't generate a new key pair: %s"), gpgme_strerror(err));
 864                 gpgme_release(ctx);
 865                 return;
 866         }
 867         key = gpgme_op_genkey_result(ctx);
 868         if (key == NULL) {
 869                 alertpanel_error(_("Couldn't generate a new key pair: unknown error"));
 870                 gpgme_release(ctx);
 871                 return;
 872         } else {
 873                 gchar *buf = g_strdup_printf(_("Your new key pair has been generated. "
 874                                     "Its fingerprint is:\n%s\n\nDo you want to export it "
 875                                     "to a keyserver?"),
 876                                     key->fpr ? key->fpr:"null");
 877                 AlertValue val = alertpanel(_("Key generated"), buf,
 878                                   GTK_STOCK_NO, "+" GTK_STOCK_YES, NULL);
 879                 g_free(buf);
 880                 if (val == G_ALERTALTERNATE) {
 881 #ifndef G_OS_WIN32
 882                         gchar *cmd = g_strdup_printf("gpg --no-tty --send-keys %s", key->fpr);
 883                         int res = 0;
 884                         pid_t pid = 0;
 885                         pid = fork();
 886                         if (pid == -1) {
 887                                 res = -1;
 888                         } else if (pid == 0) {
 889                                 /* son */
 890                                 res = system(cmd);
 891                                 res = WEXITSTATUS(res);
 892                                 _exit(res);
 893                         } else {
 894                                 int status = 0;
 895                                 time_t start_wait = time(NULL);
 896                                 res = -1;
 897                                 do {
 898                                         if (waitpid(pid, &status, WNOHANG) == 0 || !WIFEXITED(status)) {
 899                                                 usleep(200000);
 900                                         } else {
 901                                                 res = WEXITSTATUS(status);
 902                                                 break;
 903                                         }
 904                                         if (time(NULL) - start_wait > 5) {
 905                                                 debug_print("SIGTERM'ing gpg\n");
 906                                                 kill(pid, SIGTERM);
 907                                         }
 908                                         if (time(NULL) - start_wait > 6) {
 909                                                 debug_print("SIGKILL'ing gpg\n");
 910                                                 kill(pid, SIGKILL);
 911                                                 break;
 912                                         }
 913                                 } while(1);
 914                         }
 915                         if (res == 0) {
 916                                 alertpanel_notice(_("Key exported."));
 917                         } else {
 918                                 alertpanel_error(_("Couldn't export key."));
 919                         }
 920                         g_free(cmd);
 921 #else
 922                         alertpanel_error(_("Key export isn't implemented in Windows."));
 923 #endif
 924                 }
 925         }
 926         prefs_gpg_get_config()->gpg_ask_create_key = FALSE;
 927         prefs_gpg_save_config();
 928         gpgme_release(ctx);
 929 }
 930
 931 gboolean sgpgme_has_secret_key(void)
 932 {
 933         gpgme_error_t err = 0;
 934         gpgme_ctx_t ctx;
 935         gpgme_key_t key;
 936
 937         err = gpgme_new (&ctx);
 938         if (err) {
 939                 debug_print("err : %s\n", gpgme_strerror(err));
 940                 return TRUE;
 941         }
 942 check_again:
 943         err = gpgme_op_keylist_start(ctx, NULL, TRUE);
 944         if (!err)
 945                 err = gpgme_op_keylist_next(ctx, &key);
 946         gpgme_op_keylist_end(ctx);
 947         if (gpg_err_code(err) == GPG_ERR_EOF) {
 948                 if (gpgme_get_protocol(ctx) != GPGME_PROTOCOL_CMS) {
 949                         gpgme_set_protocol(ctx, GPGME_PROTOCOL_CMS);
 950                         goto check_again;
 951                 }
 952                 gpgme_release(ctx);
 953                 return FALSE;
 954         } else {
 955                 gpgme_release(ctx);
 956                 return TRUE;
 957         }
 958 }
 959
 960 void sgpgme_check_create_key(void)
 961 {
 962         if (prefs_gpg_get_config()->gpg_ask_create_key &&
 963             !sgpgme_has_secret_key()) {
 964                 sgpgme_create_secret_key(NULL, TRUE);
 965         } else {
 966                 prefs_gpg_get_config()->gpg_ask_create_key = FALSE;
 967                 prefs_gpg_save_config();
 968         }
 969 }
 970
 971 void *sgpgme_data_release_and_get_mem(gpgme_data_t data, size_t *len)
 972 {
 973         char buf[BUFSIZ];
 974         void *result = NULL;
 975         ssize_t r = 0;
 976         size_t w = 0;
 977
 978         if (data == NULL)
 979                 return NULL;
 980         if (len == NULL)
 981                 return NULL;
 982
 983         /* I know it's deprecated, but we don't compile with _LARGEFILE */
 984         cm_gpgme_data_rewind(data);
 985         while ((r = gpgme_data_read(data, buf, BUFSIZ)) > 0) {
 986                 result = realloc(result, r + w);
 987                 if (result == NULL) {
 988                         g_warning("can't allocate memory\n");
 989                         return NULL;
 990                 }
 991                 memcpy(result+w, buf, r);
 992                 w += r;
 993         }
 994
 995         *len = w;
 996
 997         gpgme_data_release(data);
 998         if (r < 0) {
 999                 free(result);
1000                 *len = 0;
1001                 return NULL;
1002         }
1003         return result;
1004 }
1005
1006 gpgme_error_t cm_gpgme_data_rewind(gpgme_data_t dh)
1007 {
1008 #if defined(_FILE_OFFSET_BITS) && _FILE_OFFSET_BITS == 64
1009         if (gpgme_data_seek(dh, (off_t)0, SEEK_SET) == -1)
1010                 return gpg_error_from_errno(errno);
1011         else
1012                 return 0;
1013 #else
1014         return gpgme_data_rewind(dh);
1015 #endif
1016 }
1017
1018 #endif /* USE_GPGME */