src/plugins/pgpcore/sgpgme.c

   1 /*
   2  * Claws Mail -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2015 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
 227         switch (gpg_err_code(sig->status)) {
 228         case GPG_ERR_NO_ERROR:
 229                switch (key->uids?key->uids->validity:GPGME_VALIDITY_UNKNOWN) {
 230                 case GPGME_VALIDITY_ULTIMATE:
 231                         result = g_strdup_printf(_("Good signature from \"%s\" [ultimate]"), uname);
 232                         break;
 233                 case GPGME_VALIDITY_FULL:
 234                         result = g_strdup_printf(_("Good signature from \"%s\" [full]"), uname);
 235                         break;
 236                 case GPGME_VALIDITY_MARGINAL:
 237                         result = g_strdup_printf(_("Good signature from \"%s\" [marginal]"), uname);
 238                         break;
 239                 case GPGME_VALIDITY_UNKNOWN:
 240                 case GPGME_VALIDITY_UNDEFINED:
 241                 case GPGME_VALIDITY_NEVER:
 242                 default:
 243                         result = g_strdup_printf(_("Good signature from \"%s\""), uname);
 244                         break;
 245                }
 246                 break;
 247         case GPG_ERR_SIG_EXPIRED:
 248                 result = g_strdup_printf(_("Expired signature from \"%s\""), uname);
 249                 break;
 250         case GPG_ERR_KEY_EXPIRED:
 251                 result = g_strdup_printf(_("Good signature from \"%s\", but the key has expired"), uname);
 252                 break;
 253         case GPG_ERR_CERT_REVOKED:
 254                 result = g_strdup_printf(_("Good signature from \"%s\", but the key has been revoked"), uname);
 255                 break;
 256         case GPG_ERR_BAD_SIGNATURE:
 257                 result = g_strdup_printf(_("Bad signature from \"%s\""), uname);
 258                 break;
 259         case GPG_ERR_NO_PUBKEY: {
 260                 gchar *id = g_strdup(sig->fpr + strlen(sig->fpr)-8);
 261                 result = g_strdup_printf(_("Key 0x%s not available to verify this signature"), id);
 262                 g_free(id);
 263                 break;
 264                 }
 265         default:
 266                 result = g_strdup(_("The signature has not been checked"));
 267                 break;
 268         }
 269         if (result == NULL)
 270                 result = g_strdup(_("Error"));
 271         g_free(uname);
 272         return result;
 273 }
 274
 275 gchar *sgpgme_sigstat_info_full(gpgme_ctx_t ctx, gpgme_verify_result_t status)
 276 {
 277         gint i = 0;
 278         gchar *ret;
 279         GString *siginfo;
 280         gpgme_signature_t sig = NULL;
 281
 282         siginfo = g_string_sized_new(64);
 283         if (status == NULL) {
 284                 g_string_append_printf(siginfo,
 285                         _("Error checking signature: no status\n"));
 286                 goto bail;
 287          }
 288
 289         sig = status->signatures;
 290
 291         while (sig) {
 292                 char buf[100];
 293                 struct tm lt;
 294                 gpgme_key_t key;
 295                 gpgme_error_t err;
 296                 const gchar *keytype, *keyid, *uid;
 297
 298                 err = gpgme_get_key(ctx, sig->fpr, &key, 0);
 299
 300                 if (err != GPG_ERR_NO_ERROR) {
 301                         key = NULL;
 302                         g_string_append_printf(siginfo,
 303                                 _("Error checking signature: %s\n"),
 304                                 gpgme_strerror(err));
 305                         goto bail;
 306                 }
 307                 if (key) {
 308                         keytype = gpgme_pubkey_algo_name(
 309                                         key->subkeys->pubkey_algo);
 310                         keyid = key->subkeys->keyid;
 311                         uid = key->uids->uid;
 312                 } else {
 313                         keytype = "?";
 314                         keyid = "?";
 315                         uid = "?";
 316                 }
 317
 318                 memset(buf, 0, sizeof(buf));
 319                 fast_strftime(buf, sizeof(buf)-1, prefs_common_get_prefs()->date_format, localtime_r(&sig->timestamp, &lt));
 320                 g_string_append_printf(siginfo,
 321                         _("Signature made on %s using %s key ID %s\n"),
 322                         buf, keytype, keyid);
 323
 324                 switch (gpg_err_code(sig->status)) {
 325                 case GPG_ERR_NO_ERROR:
 326                         g_string_append_printf(siginfo,
 327                                 _("Good signature from uid \"%s\" (Validity: %s)\n"),
 328                                 uid, get_validity_str(key->uids?key->uids->validity:GPGME_VALIDITY_UNKNOWN));
 329                         break;
 330                 case GPG_ERR_KEY_EXPIRED:
 331                         g_string_append_printf(siginfo,
 332                                 _("Expired key uid \"%s\"\n"),
 333                                 uid);
 334                         break;
 335                 case GPG_ERR_SIG_EXPIRED:
 336                         g_string_append_printf(siginfo,
 337                                 _("Expired signature from uid \"%s\" (Validity: %s)\n"),
 338                                 uid, get_validity_str(key->uids?key->uids->validity:GPGME_VALIDITY_UNKNOWN));
 339                         break;
 340                 case GPG_ERR_CERT_REVOKED:
 341                         g_string_append_printf(siginfo,
 342                                 _("Revoked key uid \"%s\"\n"),
 343                                 uid);
 344                         break;
 345                 case GPG_ERR_BAD_SIGNATURE:
 346                         g_string_append_printf(siginfo,
 347                                 _("BAD signature from \"%s\"\n"),
 348                                 uid);
 349                         break;
 350                 default:
 351                         break;
 352                 }
 353                 if (sig->status != GPG_ERR_BAD_SIGNATURE) {
 354                         gint j = 1;
 355                         key->uids = key->uids ? key->uids->next : NULL;
 356                         while (key->uids != NULL) {
 357                                 g_string_append_printf(siginfo,
 358                                         _("                    uid \"%s\" (Validity: %s)\n"),
 359                                         key->uids->uid,
 360                                         key->uids->revoked==TRUE?_("Revoked"):get_validity_str(key->uids->validity));
 361                                 j++;
 362                                 key->uids = key->uids->next;
 363                         }
 364                         g_string_append_printf(siginfo,_("Owner Trust: %s\n"),
 365                                                get_owner_trust_str(key->owner_trust));
 366                         g_string_append(siginfo,
 367                                 _("Primary key fingerprint:"));
 368                         const char* primary_fpr = NULL;
 369                         if (key && key->subkeys && key->subkeys->fpr)
 370                                 primary_fpr = key->subkeys->fpr;
 371                         else
 372                                 g_string_append(siginfo, " ?");
 373                         int idx; /* now pretty-print the fingerprint */
 374                         for (idx=0; primary_fpr && *primary_fpr!='\0'; idx++, primary_fpr++) {
 375                                 if (idx%4==0)
 376                                         g_string_append_c(siginfo, ' ');
 377                                 if (idx%20==0)
 378                                         g_string_append_c(siginfo, ' ');
 379                                 g_string_append_c(siginfo, (gchar)*primary_fpr);
 380                         }
 381                         g_string_append_c(siginfo, '\n');
 382 #ifdef HAVE_GPGME_PKA_TRUST
 383                         if (sig->pka_trust == 1 && sig->pka_address) {
 384                                 g_string_append_printf(siginfo,
 385                                    _("WARNING: Signer's address \"%s\" "
 386                                       "does not match DNS entry\n"),
 387                                    sig->pka_address);
 388                         }
 389                         else if (sig->pka_trust == 2 && sig->pka_address) {
 390                                 g_string_append_printf(siginfo,
 391                                    _("Verified signer's address is \"%s\"\n"),
 392                                    sig->pka_address);
 393                                 /* FIXME: Compare the address to the
 394                                  * From: address.  */
 395                         }
 396 #endif /*HAVE_GPGME_PKA_TRUST*/
 397                 }
 398
 399                 g_string_append(siginfo, "\n");
 400                 i++;
 401                 sig = sig->next;
 402         }
 403 bail:
 404         ret = siginfo->str;
 405         g_string_free(siginfo, FALSE);
 406         return ret;
 407 }
 408
 409 gpgme_data_t sgpgme_data_from_mimeinfo(MimeInfo *mimeinfo)
 410 {
 411         gpgme_data_t data = NULL;
 412         gpgme_error_t err;
 413         FILE *fp = g_fopen(mimeinfo->data.filename, "rb");
 414
 415         if (!fp)
 416                 return NULL;
 417
 418         err = gpgme_data_new_from_filepart(&data, NULL, fp, mimeinfo->offset, mimeinfo->length);
 419         fclose(fp);
 420
 421         debug_print("data %p (%d %d)\n", (void *)&data, mimeinfo->offset, mimeinfo->length);
 422         if (err) {
 423                 debug_print ("gpgme_data_new_from_file failed: %s\n",
 424                              gpgme_strerror (err));
 425                 privacy_set_error(_("Couldn't get data from message, %s"), gpgme_strerror(err));
 426                 return NULL;
 427         }
 428         return data;
 429 }
 430
 431 gpgme_data_t sgpgme_decrypt_verify(gpgme_data_t cipher, gpgme_verify_result_t *status, gpgme_ctx_t ctx)
 432 {
 433         struct passphrase_cb_info_s info;
 434         gpgme_data_t plain;
 435         gpgme_error_t err;
 436
 437         memset (&info, 0, sizeof info);
 438
 439         if ((err = gpgme_data_new(&plain)) != GPG_ERR_NO_ERROR) {
 440                 gpgme_release(ctx);
 441                 privacy_set_error(_("Couldn't initialize data, %s"), gpgme_strerror(err));
 442                 return NULL;
 443         }
 444
 445         if (gpgme_get_protocol(ctx) == GPGME_PROTOCOL_OpenPGP) {
 446                 prefs_gpg_enable_agent(prefs_gpg_get_config()->use_gpg_agent);
 447                 if (!getenv("GPG_AGENT_INFO") || !prefs_gpg_get_config()->use_gpg_agent) {
 448                         info.c = ctx;
 449                         gpgme_set_passphrase_cb (ctx, gpgmegtk_passphrase_cb, &info);
 450                 }
 451         } else {
 452                 prefs_gpg_enable_agent(TRUE);
 453                 info.c = ctx;
 454                 gpgme_set_passphrase_cb (ctx, NULL, &info);
 455         }
 456
 457
 458         if (gpgme_get_protocol(ctx) == GPGME_PROTOCOL_OpenPGP) {
 459                 err = gpgme_op_decrypt_verify(ctx, cipher, plain);
 460                 if (err != GPG_ERR_NO_ERROR) {
 461                         debug_print("can't decrypt (%s)\n", gpgme_strerror(err));
 462                         privacy_set_error("%s", gpgme_strerror(err));
 463                         gpgmegtk_free_passphrase();
 464                         gpgme_data_release(plain);
 465                         return NULL;
 466                 }
 467
 468                 err = cm_gpgme_data_rewind(plain);
 469                 if (err) {
 470                         debug_print("can't seek (%d %d %s)\n", err, errno, g_strerror(errno));
 471                 }
 472
 473                 debug_print("decrypted.\n");
 474                 *status = gpgme_op_verify_result (ctx);
 475         } else {
 476                 err = gpgme_op_decrypt(ctx, cipher, plain);
 477                 if (err != GPG_ERR_NO_ERROR) {
 478                         debug_print("can't decrypt (%s)\n", gpgme_strerror(err));
 479                         privacy_set_error("%s", gpgme_strerror(err));
 480                         gpgmegtk_free_passphrase();
 481                         gpgme_data_release(plain);
 482                         return NULL;
 483                 }
 484
 485                 err = cm_gpgme_data_rewind(plain);
 486                 if (err) {
 487                         debug_print("can't seek (%d %d %s)\n", err, errno, g_strerror(errno));
 488                 }
 489
 490                 debug_print("decrypted.\n");
 491                 *status = gpgme_op_verify_result (ctx);
 492         }
 493         return plain;
 494 }
 495
 496 gchar *sgpgme_get_encrypt_data(GSList *recp_names, gpgme_protocol_t proto)
 497 {
 498         SelectionResult result = KEY_SELECTION_CANCEL;
 499         gpgme_key_t *keys = gpgmegtk_recipient_selection(recp_names, &result,
 500                                 proto);
 501         gchar *ret = NULL;
 502         int i = 0;
 503
 504         if (!keys) {
 505                 if (result == KEY_SELECTION_DONT)
 506                         return g_strdup("_DONT_ENCRYPT_");
 507                 else
 508                         return NULL;
 509         }
 510         while (keys[i]) {
 511                 gpgme_subkey_t skey = keys[i]->subkeys;
 512                 gchar *fpr = skey->fpr;
 513                 gchar *tmp = NULL;
 514                 debug_print("adding %s\n", fpr);
 515                 tmp = g_strconcat(ret?ret:"", fpr, " ", NULL);
 516                 g_free(ret);
 517                 ret = tmp;
 518                 i++;
 519         }
 520         return ret;
 521 }
 522
 523 gboolean sgpgme_setup_signers(gpgme_ctx_t ctx, PrefsAccount *account,
 524                               const gchar *from_addr)
 525 {
 526         GPGAccountConfig *config;
 527         const gchar *signer_addr = account->address;
 528
 529         gpgme_signers_clear(ctx);
 530
 531         if (from_addr)
 532                 signer_addr = from_addr;
 533         config = prefs_gpg_account_get_config(account);
 534
 535         switch(config->sign_key) {
 536         case SIGN_KEY_DEFAULT:
 537                 debug_print("using default gnupg key\n");
 538                 break;
 539         case SIGN_KEY_BY_FROM:
 540                 debug_print("using key for %s\n", signer_addr);
 541                 break;
 542         case SIGN_KEY_CUSTOM:
 543                 debug_print("using key for %s\n", config->sign_key_id);
 544                 break;
 545         }
 546
 547         if (config->sign_key != SIGN_KEY_DEFAULT) {
 548                 const gchar *keyid;
 549                 gpgme_key_t key, found_key;
 550                 gpgme_error_t err;
 551
 552                 if (config->sign_key == SIGN_KEY_BY_FROM)
 553                         keyid = signer_addr;
 554                 else if (config->sign_key == SIGN_KEY_CUSTOM)
 555                         keyid = config->sign_key_id;
 556                 else
 557                         goto bail;
 558
 559                 found_key = NULL;
 560                 /* Look for any key, not just private ones, or GPGMe doesn't
 561                  * correctly set the revoked flag. */
 562                 err = gpgme_op_keylist_start(ctx, keyid, 0);
 563                 while ((err = gpgme_op_keylist_next(ctx, &key)) == 0) {
 564                         if (key == NULL)
 565                                 continue;
 566
 567                         if (!key->can_sign)
 568                                 continue;
 569
 570                         if (key->protocol != gpgme_get_protocol(ctx)) {
 571                                 debug_print("skipping a key (wrong protocol %d)\n", key->protocol);
 572                                 gpgme_key_release(key);
 573                                 continue;
 574                         }
 575
 576                         if (key->expired) {
 577                                 debug_print("skipping a key, expired");
 578                                 gpgme_key_release(key);
 579                                 continue;
 580                         }
 581                         if (key->revoked) {
 582                                 debug_print("skipping a key, revoked");
 583                                 gpgme_key_release(key);
 584                                 continue;
 585                         }
 586                         if (key->disabled) {
 587                                 debug_print("skipping a key, disabled");
 588                                 gpgme_key_release(key);
 589                                 continue;
 590                         }
 591
 592                         if (found_key != NULL) {
 593                                 gpgme_key_release(key);
 594                                 gpgme_op_keylist_end(ctx);
 595                                 g_warning("ambiguous specification of secret key '%s'\n", keyid);
 596                                 privacy_set_error(_("Secret key specification is ambiguous"));
 597                                 goto bail;
 598                         }
 599
 600                         found_key = key;
 601                 }
 602                 gpgme_op_keylist_end(ctx);
 603
 604                 if (found_key == NULL) {
 605                         g_warning("setup_signers start: %s", gpgme_strerror(err));
 606                         privacy_set_error(_("Secret key not found (%s)"), gpgme_strerror(err));
 607                         goto bail;
 608                 }
 609
 610                 err = gpgme_signers_add(ctx, found_key);
 611                 debug_print("got key (proto %d (pgp %d, smime %d).\n",
 612                             found_key->protocol, GPGME_PROTOCOL_OpenPGP,
 613                             GPGME_PROTOCOL_CMS);
 614                 gpgme_key_release(found_key);
 615
 616                 if (err) {
 617                         g_warning("error adding secret key: %s\n",
 618                                   gpgme_strerror(err));
 619                         privacy_set_error(_("Error setting secret key: %s"),
 620                                           gpgme_strerror(err));
 621                         goto bail;
 622                 }
 623         }
 624
 625         prefs_gpg_account_free_config(config);
 626
 627         return TRUE;
 628 bail:
 629         prefs_gpg_account_free_config(config);
 630         return FALSE;
 631 }
 632
 633 void sgpgme_init()
 634 {
 635         gchar *ctype_locale = NULL, *messages_locale = NULL;
 636         gchar *ctype_utf8_locale = NULL, *messages_utf8_locale = NULL;
 637
 638         gpgme_engine_info_t engineInfo;
 639         if (gpgme_check_version("1.0.0")) {
 640 #ifdef LC_CTYPE
 641                 debug_print("setting gpgme CTYPE locale\n");
 642 #ifdef G_OS_WIN32
 643                 ctype_locale = g_win32_getlocale();
 644 #else
 645                 ctype_locale = g_strdup(setlocale(LC_CTYPE, NULL));
 646 #endif
 647                 if (ctype_locale) {
 648                         debug_print("setting gpgme CTYPE locale to: %s\n", ctype_locale);
 649                         if (strchr(ctype_locale, '.'))
 650                                 *(strchr(ctype_locale, '.')) = '\0';
 651                         else if (strchr(ctype_locale, '@'))
 652                                 *(strchr(ctype_locale, '@')) = '\0';
 653                         ctype_utf8_locale = g_strconcat(ctype_locale, ".UTF-8", NULL);
 654
 655                         debug_print("setting gpgme locale to UTF8: %s\n", ctype_utf8_locale ? ctype_utf8_locale : "NULL");
 656                         gpgme_set_locale(NULL, LC_CTYPE, ctype_utf8_locale);
 657
 658                         debug_print("done\n");
 659                         g_free(ctype_utf8_locale);
 660                         g_free(ctype_locale);
 661                 } else {
 662                         debug_print("couldn't set gpgme CTYPE locale\n");
 663                 }
 664 #endif
 665 #ifdef LC_MESSAGES
 666                 debug_print("setting gpgme MESSAGES locale\n");
 667 #ifdef G_OS_WIN32
 668                 messages_locale = g_win32_getlocale();
 669 #else
 670                 messages_locale = g_strdup(setlocale(LC_MESSAGES, NULL));
 671 #endif
 672                 if (messages_locale) {
 673                         debug_print("setting gpgme MESSAGES locale to: %s\n", messages_locale);
 674                         if (strchr(messages_locale, '.'))
 675                                 *(strchr(messages_locale, '.')) = '\0';
 676                         else if (strchr(messages_locale, '@'))
 677                                 *(strchr(messages_locale, '@')) = '\0';
 678                         messages_utf8_locale = g_strconcat(messages_locale, ".UTF-8", NULL);
 679                         debug_print("setting gpgme locale to UTF8: %s\n", messages_utf8_locale ? messages_utf8_locale : "NULL");
 680
 681                         gpgme_set_locale(NULL, LC_MESSAGES, messages_utf8_locale);
 682
 683                         debug_print("done\n");
 684                         g_free(messages_utf8_locale);
 685                         g_free(messages_locale);
 686                 } else {
 687                         debug_print("couldn't set gpgme MESSAGES locale\n");
 688                 }
 689 #endif
 690                 if (!gpgme_get_engine_info(&engineInfo)) {
 691                         while (engineInfo) {
 692                                 debug_print("GpgME Protocol: %s\n"
 693                                             "Version: %s (req %s)\n"
 694                                             "Executable: %s\n",
 695                                         gpgme_get_protocol_name(engineInfo->protocol) ? gpgme_get_protocol_name(engineInfo->protocol):"???",
 696                                         engineInfo->version ? engineInfo->version:"???",
 697                                         engineInfo->req_version ? engineInfo->req_version:"???",
 698                                         engineInfo->file_name ? engineInfo->file_name:"???");
 699                                 if (engineInfo->protocol == GPGME_PROTOCOL_OpenPGP
 700                                 &&  gpgme_engine_check_version(engineInfo->protocol) !=
 701                                         GPG_ERR_NO_ERROR) {
 702                                         if (engineInfo->file_name && !engineInfo->version) {
 703                                                 alertpanel_error(_("Gpgme protocol '%s' is unusable: "
 704                                                                    "Engine '%s' isn't installed properly."),
 705                                                                    gpgme_get_protocol_name(engineInfo->protocol),
 706                                                                    engineInfo->file_name);
 707                                         } else if (engineInfo->file_name && engineInfo->version
 708                                           && engineInfo->req_version) {
 709                                                 alertpanel_error(_("Gpgme protocol '%s' is unusable: "
 710                                                                    "Engine '%s' version %s is installed, "
 711                                                                    "but version %s is required.\n"),
 712                                                                    gpgme_get_protocol_name(engineInfo->protocol),
 713                                                                    engineInfo->file_name,
 714                                                                    engineInfo->version,
 715                                                                    engineInfo->req_version);
 716                                         } else {
 717                                                 alertpanel_error(_("Gpgme protocol '%s' is unusable "
 718                                                                    "(unknown problem)"),
 719                                                                    gpgme_get_protocol_name(engineInfo->protocol));
 720                                         }
 721                                 }
 722                                 engineInfo = engineInfo->next;
 723                         }
 724                 }
 725         } else {
 726                 sgpgme_disable_all();
 727
 728                 if (prefs_gpg_get_config()->gpg_warning) {
 729                         AlertValue val;
 730
 731                         val = alertpanel_full
 732                                 (_("Warning"),
 733                                  _("GnuPG is not installed properly, or needs "
 734                                  "to be upgraded.\n"
 735                                  "OpenPGP support disabled."),
 736                                  GTK_STOCK_CLOSE, NULL, NULL, TRUE, NULL,
 737                                  ALERT_WARNING, G_ALERTDEFAULT);
 738                         if (val & G_ALERTDISABLE)
 739                                 prefs_gpg_get_config()->gpg_warning = FALSE;
 740                 }
 741         }
 742 }
 743
 744 void sgpgme_done()
 745 {
 746         gpgmegtk_free_passphrase();
 747 }
 748
 749 void sgpgme_create_secret_key(PrefsAccount *account, gboolean ask_create)
 750 {
 751         AlertValue val = G_ALERTDEFAULT;
 752         gchar *key_parms = NULL;
 753         gchar *name = NULL;
 754         gchar *email = NULL;
 755         gchar *passphrase = NULL, *passphrase_second = NULL;
 756         gint prev_bad = 0;
 757         gchar *tmp = NULL;
 758         gpgme_error_t err = 0;
 759         gpgme_ctx_t ctx;
 760         GtkWidget *window = NULL;
 761         gpgme_genkey_result_t key;
 762
 763         if (account == NULL)
 764                 account = account_get_default();
 765
 766         if (account->address == NULL) {
 767                 alertpanel_error(_("You have to save the account's information with \"OK\" "
 768                                    "before being able to generate a key pair.\n"));
 769                 return;
 770         }
 771         if (ask_create) {
 772                 val = alertpanel(_("No PGP key found"),
 773                                 _("Claws Mail did not find a secret PGP key, "
 774                                   "which means that you won't be able to sign "
 775                                   "emails or receive encrypted emails.\n"
 776                                   "Do you want to create a new key pair now?"),
 777                                   GTK_STOCK_NO, "+" GTK_STOCK_YES, NULL);
 778                 if (val == G_ALERTDEFAULT) {
 779                         prefs_gpg_get_config()->gpg_ask_create_key = FALSE;
 780                         prefs_gpg_save_config();
 781                         return;
 782                 }
 783         }
 784
 785         if (account->name) {
 786                 name = g_strdup(account->name);
 787         } else {
 788                 name = g_strdup(account->address);
 789         }
 790         email = g_strdup(account->address);
 791         tmp = g_strdup_printf("%s <%s>", account->name?account->name:account->address, account->address);
 792 again:
 793         passphrase = passphrase_mbox(tmp, NULL, prev_bad, 1);
 794         if (passphrase == NULL) {
 795                 g_free(tmp);
 796                 g_free(email);
 797                 g_free(name);
 798                 return;
 799         }
 800         passphrase_second = passphrase_mbox(tmp, NULL, 0, 2);
 801         if (passphrase_second == NULL) {
 802                 g_free(tmp);
 803                 g_free(email);
 804                 g_free(passphrase);
 805                 g_free(name);
 806                 return;
 807         }
 808         if (strcmp(passphrase, passphrase_second)) {
 809                 g_free(passphrase);
 810                 g_free(passphrase_second);
 811                 prev_bad = 1;
 812                 goto again;
 813         }
 814
 815         key_parms = g_strdup_printf("<GnupgKeyParms format=\"internal\">\n"
 816                                         "Key-Type: RSA\n"
 817                                         "Key-Length: 2048\n"
 818                                         "Subkey-Type: RSA\n"
 819                                         "Subkey-Length: 2048\n"
 820                                         "Name-Real: %s\n"
 821                                         "Name-Email: %s\n"
 822                                         "Expire-Date: 0\n"
 823                                         "%s%s%s"
 824                                         "</GnupgKeyParms>\n",
 825                                         name, email,
 826                                         strlen(passphrase)?"Passphrase: ":"",
 827                                         passphrase,
 828                                         strlen(passphrase)?"\n":"");
 829 #ifndef G_PLATFORM_WIN32
 830         if (mlock(passphrase, strlen(passphrase)) == -1)
 831                 debug_print("couldn't lock passphrase\n");
 832         if (mlock(passphrase_second, strlen(passphrase_second)) == -1)
 833                 debug_print("couldn't lock passphrase2\n");
 834 #endif
 835         g_free(tmp);
 836         g_free(email);
 837         g_free(name);
 838         g_free(passphrase_second);
 839         g_free(passphrase);
 840
 841         err = gpgme_new (&ctx);
 842         if (err) {
 843                 alertpanel_error(_("Couldn't generate a new key pair: %s"),
 844                                  gpgme_strerror(err));
 845                 g_free(key_parms);
 846                 return;
 847         }
 848
 849
 850         window = label_window_create(_("Generating your new key pair... Please move the mouse "
 851                               "around to help generate entropy..."));
 852
 853         err = gpgme_op_genkey(ctx, key_parms, NULL, NULL);
 854         g_free(key_parms);
 855
 856         label_window_destroy(window);
 857
 858         if (err) {
 859                 alertpanel_error(_("Couldn't generate a new key pair: %s"), gpgme_strerror(err));
 860                 gpgme_release(ctx);
 861                 return;
 862         }
 863         key = gpgme_op_genkey_result(ctx);
 864         if (key == NULL) {
 865                 alertpanel_error(_("Couldn't generate a new key pair: unknown error"));
 866                 gpgme_release(ctx);
 867                 return;
 868         } else {
 869                 gchar *buf = g_strdup_printf(_("Your new key pair has been generated. "
 870                                     "Its fingerprint is:\n%s\n\nDo you want to export it "
 871                                     "to a keyserver?"),
 872                                     key->fpr ? key->fpr:"null");
 873                 AlertValue val = alertpanel(_("Key generated"), buf,
 874                                   GTK_STOCK_NO, "+" GTK_STOCK_YES, NULL);
 875                 g_free(buf);
 876                 if (val == G_ALERTALTERNATE) {
 877 #ifndef G_OS_WIN32
 878                         gchar *cmd = g_strdup_printf("gpg --no-tty --send-keys %s", key->fpr);
 879                         int res = 0;
 880                         pid_t pid = 0;
 881                         pid = fork();
 882                         if (pid == -1) {
 883                                 res = -1;
 884                         } else if (pid == 0) {
 885                                 /* son */
 886                                 res = system(cmd);
 887                                 res = WEXITSTATUS(res);
 888                                 _exit(res);
 889                         } else {
 890                                 int status = 0;
 891                                 time_t start_wait = time(NULL);
 892                                 res = -1;
 893                                 do {
 894                                         if (waitpid(pid, &status, WNOHANG) == 0 || !WIFEXITED(status)) {
 895                                                 usleep(200000);
 896                                         } else {
 897                                                 res = WEXITSTATUS(status);
 898                                                 break;
 899                                         }
 900                                         if (time(NULL) - start_wait > 5) {
 901                                                 debug_print("SIGTERM'ing gpg\n");
 902                                                 kill(pid, SIGTERM);
 903                                         }
 904                                         if (time(NULL) - start_wait > 6) {
 905                                                 debug_print("SIGKILL'ing gpg\n");
 906                                                 kill(pid, SIGKILL);
 907                                                 break;
 908                                         }
 909                                 } while(1);
 910                         }
 911                         if (res == 0) {
 912                                 alertpanel_notice(_("Key exported."));
 913                         } else {
 914                                 alertpanel_error(_("Couldn't export key."));
 915                         }
 916                         g_free(cmd);
 917 #else
 918                         alertpanel_error(_("Key export isn't implemented in Windows."));
 919 #endif
 920                 }
 921         }
 922         prefs_gpg_get_config()->gpg_ask_create_key = FALSE;
 923         prefs_gpg_save_config();
 924         gpgme_release(ctx);
 925 }
 926
 927 gboolean sgpgme_has_secret_key(void)
 928 {
 929         gpgme_error_t err = 0;
 930         gpgme_ctx_t ctx;
 931         gpgme_key_t key;
 932
 933         err = gpgme_new (&ctx);
 934         if (err) {
 935                 debug_print("err : %s\n", gpgme_strerror(err));
 936                 return TRUE;
 937         }
 938 check_again:
 939         err = gpgme_op_keylist_start(ctx, NULL, TRUE);
 940         if (!err)
 941                 err = gpgme_op_keylist_next(ctx, &key);
 942         gpgme_op_keylist_end(ctx);
 943         if (gpg_err_code(err) == GPG_ERR_EOF) {
 944                 if (gpgme_get_protocol(ctx) != GPGME_PROTOCOL_CMS) {
 945                         gpgme_set_protocol(ctx, GPGME_PROTOCOL_CMS);
 946                         goto check_again;
 947                 }
 948                 gpgme_release(ctx);
 949                 return FALSE;
 950         } else {
 951                 gpgme_release(ctx);
 952                 return TRUE;
 953         }
 954 }
 955
 956 void sgpgme_check_create_key(void)
 957 {
 958         if (prefs_gpg_get_config()->gpg_ask_create_key &&
 959             !sgpgme_has_secret_key()) {
 960                 sgpgme_create_secret_key(NULL, TRUE);
 961         } else {
 962                 prefs_gpg_get_config()->gpg_ask_create_key = FALSE;
 963                 prefs_gpg_save_config();
 964         }
 965 }
 966
 967 void *sgpgme_data_release_and_get_mem(gpgme_data_t data, size_t *len)
 968 {
 969         char buf[BUFSIZ];
 970         void *result = NULL;
 971         ssize_t r = 0;
 972         size_t w = 0;
 973
 974         if (data == NULL)
 975                 return NULL;
 976         if (len == NULL)
 977                 return NULL;
 978
 979         /* I know it's deprecated, but we don't compile with _LARGEFILE */
 980         cm_gpgme_data_rewind(data);
 981         while ((r = gpgme_data_read(data, buf, BUFSIZ)) > 0) {
 982                 result = realloc(result, r + w);
 983                 if (result == NULL) {
 984                         g_warning("can't allocate memory\n");
 985                         return NULL;
 986                 }
 987                 memcpy(result+w, buf, r);
 988                 w += r;
 989         }
 990
 991         *len = w;
 992
 993         gpgme_data_release(data);
 994         if (r < 0) {
 995                 free(result);
 996                 *len = 0;
 997                 return NULL;
 998         }
 999         return result;
1000 }
1001
1002 gpgme_error_t cm_gpgme_data_rewind(gpgme_data_t dh)
1003 {
1004 #if defined(_FILE_OFFSET_BITS) && _FILE_OFFSET_BITS == 64
1005         if (gpgme_data_seek(dh, (off_t)0, SEEK_SET) == -1)
1006                 return gpg_error_from_errno(errno);
1007         else
1008                 return 0;
1009 #else
1010         return gpgme_data_rewind(dh);
1011 #endif
1012 }
1013
1014 #endif /* USE_GPGME */