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         } else if (gpg_err_code(err) != GPG_ERR_NO_ERROR && gpg_err_code(err) == GPG_ERR_EOF) {
 222                 /*
 223                  * When gpg is upgraded to gpg-v21 then installer tries to migrate the old
 224                  * gpg keyrings found in ~/.gnupg to the new version. If the keyrings contain
 225                  * very old keys using ciphers no more supported in gpg-v21 this transition
 226                  * can fail and the left-over ~/.gnupg/pubring.gpg will cause claws to crash
 227                  * when the above condition is meet.
 228                  */
 229                 return g_strdup_printf(_("The signature can't be checked - %s. Removing\n"
 230                                          "left-over ~/.gnupg/pubring.gpg might solve the\n"
 231                                          "problem if you have installed gpg-v21"),
 232                         gpgme_strerror(err));
 233         }
 234         if (key)
 235                 uname = extract_name(key->uids->uid);
 236         else
 237                 uname = g_strdup("<?>");
 238
 239         switch (gpg_err_code(sig->status)) {
 240         case GPG_ERR_NO_ERROR:
 241                switch (key->uids?key->uids->validity:GPGME_VALIDITY_UNKNOWN) {
 242                 case GPGME_VALIDITY_ULTIMATE:
 243                         result = g_strdup_printf(_("Good signature from \"%s\" [ultimate]"), uname);
 244                         break;
 245                 case GPGME_VALIDITY_FULL:
 246                         result = g_strdup_printf(_("Good signature from \"%s\" [full]"), uname);
 247                         break;
 248                 case GPGME_VALIDITY_MARGINAL:
 249                         result = g_strdup_printf(_("Good signature from \"%s\" [marginal]"), uname);
 250                         break;
 251                 case GPGME_VALIDITY_UNKNOWN:
 252                 case GPGME_VALIDITY_UNDEFINED:
 253                 case GPGME_VALIDITY_NEVER:
 254                 default:
 255                         result = g_strdup_printf(_("Good signature from \"%s\""), uname);
 256                         break;
 257                }
 258                 break;
 259         case GPG_ERR_SIG_EXPIRED:
 260                 result = g_strdup_printf(_("Expired signature from \"%s\""), uname);
 261                 break;
 262         case GPG_ERR_KEY_EXPIRED:
 263                 result = g_strdup_printf(_("Good signature from \"%s\", but the key has expired"), uname);
 264                 break;
 265         case GPG_ERR_CERT_REVOKED:
 266                 result = g_strdup_printf(_("Good signature from \"%s\", but the key has been revoked"), uname);
 267                 break;
 268         case GPG_ERR_BAD_SIGNATURE:
 269                 result = g_strdup_printf(_("Bad signature from \"%s\""), uname);
 270                 break;
 271         case GPG_ERR_NO_PUBKEY: {
 272                 gchar *id = g_strdup(sig->fpr + strlen(sig->fpr)-8);
 273                 result = g_strdup_printf(_("Key 0x%s not available to verify this signature"), id);
 274                 g_free(id);
 275                 break;
 276                 }
 277         default:
 278                 result = g_strdup(_("The signature has not been checked"));
 279                 break;
 280         }
 281         if (result == NULL)
 282                 result = g_strdup(_("Error"));
 283         g_free(uname);
 284         return result;
 285 }
 286
 287 gchar *sgpgme_sigstat_info_full(gpgme_ctx_t ctx, gpgme_verify_result_t status)
 288 {
 289         gint i = 0;
 290         gchar *ret;
 291         GString *siginfo;
 292         gpgme_signature_t sig = NULL;
 293
 294         siginfo = g_string_sized_new(64);
 295         if (status == NULL) {
 296                 g_string_append_printf(siginfo,
 297                         _("Error checking signature: no status\n"));
 298                 goto bail;
 299          }
 300
 301         sig = status->signatures;
 302
 303         while (sig) {
 304                 char buf[100];
 305                 struct tm lt;
 306                 gpgme_key_t key;
 307                 gpgme_error_t err;
 308                 const gchar *keytype, *keyid, *uid;
 309
 310                 err = gpgme_get_key(ctx, sig->fpr, &key, 0);
 311
 312                 if (err != GPG_ERR_NO_ERROR) {
 313                         key = NULL;
 314                         g_string_append_printf(siginfo,
 315                                 _("Error checking signature: %s\n"),
 316                                 gpgme_strerror(err));
 317                         goto bail;
 318                 }
 319                 if (key) {
 320                         keytype = gpgme_pubkey_algo_name(
 321                                         key->subkeys->pubkey_algo);
 322                         keyid = key->subkeys->keyid;
 323                         uid = key->uids->uid;
 324                 } else {
 325                         keytype = "?";
 326                         keyid = "?";
 327                         uid = "?";
 328                 }
 329
 330                 memset(buf, 0, sizeof(buf));
 331                 fast_strftime(buf, sizeof(buf)-1, prefs_common_get_prefs()->date_format, localtime_r(&sig->timestamp, &lt));
 332                 g_string_append_printf(siginfo,
 333                         _("Signature made on %s using %s key ID %s\n"),
 334                         buf, keytype, keyid);
 335
 336                 switch (gpg_err_code(sig->status)) {
 337                 case GPG_ERR_NO_ERROR:
 338                         g_string_append_printf(siginfo,
 339                                 _("Good signature from uid \"%s\" (Validity: %s)\n"),
 340                                 uid, get_validity_str(key->uids?key->uids->validity:GPGME_VALIDITY_UNKNOWN));
 341                         break;
 342                 case GPG_ERR_KEY_EXPIRED:
 343                         g_string_append_printf(siginfo,
 344                                 _("Expired key uid \"%s\"\n"),
 345                                 uid);
 346                         break;
 347                 case GPG_ERR_SIG_EXPIRED:
 348                         g_string_append_printf(siginfo,
 349                                 _("Expired signature from uid \"%s\" (Validity: %s)\n"),
 350                                 uid, get_validity_str(key->uids?key->uids->validity:GPGME_VALIDITY_UNKNOWN));
 351                         break;
 352                 case GPG_ERR_CERT_REVOKED:
 353                         g_string_append_printf(siginfo,
 354                                 _("Revoked key uid \"%s\"\n"),
 355                                 uid);
 356                         break;
 357                 case GPG_ERR_BAD_SIGNATURE:
 358                         g_string_append_printf(siginfo,
 359                                 _("BAD signature from \"%s\"\n"),
 360                                 uid);
 361                         break;
 362                 default:
 363                         break;
 364                 }
 365                 if (sig->status != GPG_ERR_BAD_SIGNATURE) {
 366                         gint j = 1;
 367                         key->uids = key->uids ? key->uids->next : NULL;
 368                         while (key->uids != NULL) {
 369                                 g_string_append_printf(siginfo,
 370                                         _("                    uid \"%s\" (Validity: %s)\n"),
 371                                         key->uids->uid,
 372                                         key->uids->revoked==TRUE?_("Revoked"):get_validity_str(key->uids->validity));
 373                                 j++;
 374                                 key->uids = key->uids->next;
 375                         }
 376                         g_string_append_printf(siginfo,_("Owner Trust: %s\n"),
 377                                                get_owner_trust_str(key->owner_trust));
 378                         g_string_append(siginfo,
 379                                 _("Primary key fingerprint:"));
 380                         const char* primary_fpr = NULL;
 381                         if (key && key->subkeys && key->subkeys->fpr)
 382                                 primary_fpr = key->subkeys->fpr;
 383                         else
 384                                 g_string_append(siginfo, " ?");
 385                         int idx; /* now pretty-print the fingerprint */
 386                         for (idx=0; primary_fpr && *primary_fpr!='\0'; idx++, primary_fpr++) {
 387                                 if (idx%4==0)
 388                                         g_string_append_c(siginfo, ' ');
 389                                 if (idx%20==0)
 390                                         g_string_append_c(siginfo, ' ');
 391                                 g_string_append_c(siginfo, (gchar)*primary_fpr);
 392                         }
 393                         g_string_append_c(siginfo, '\n');
 394 #ifdef HAVE_GPGME_PKA_TRUST
 395                         if (sig->pka_trust == 1 && sig->pka_address) {
 396                                 g_string_append_printf(siginfo,
 397                                    _("WARNING: Signer's address \"%s\" "
 398                                       "does not match DNS entry\n"),
 399                                    sig->pka_address);
 400                         }
 401                         else if (sig->pka_trust == 2 && sig->pka_address) {
 402                                 g_string_append_printf(siginfo,
 403                                    _("Verified signer's address is \"%s\"\n"),
 404                                    sig->pka_address);
 405                                 /* FIXME: Compare the address to the
 406                                  * From: address.  */
 407                         }
 408 #endif /*HAVE_GPGME_PKA_TRUST*/
 409                 }
 410
 411                 g_string_append(siginfo, "\n");
 412                 i++;
 413                 sig = sig->next;
 414         }
 415 bail:
 416         ret = siginfo->str;
 417         g_string_free(siginfo, FALSE);
 418         return ret;
 419 }
 420
 421 gpgme_data_t sgpgme_data_from_mimeinfo(MimeInfo *mimeinfo)
 422 {
 423         gpgme_data_t data = NULL;
 424         gpgme_error_t err;
 425         FILE *fp = g_fopen(mimeinfo->data.filename, "rb");
 426
 427         if (!fp)
 428                 return NULL;
 429
 430         err = gpgme_data_new_from_filepart(&data, NULL, fp, mimeinfo->offset, mimeinfo->length);
 431         fclose(fp);
 432
 433         debug_print("data %p (%d %d)\n", (void *)&data, mimeinfo->offset, mimeinfo->length);
 434         if (err) {
 435                 debug_print ("gpgme_data_new_from_file failed: %s\n",
 436                              gpgme_strerror (err));
 437                 privacy_set_error(_("Couldn't get data from message, %s"), gpgme_strerror(err));
 438                 return NULL;
 439         }
 440         return data;
 441 }
 442
 443 gpgme_data_t sgpgme_decrypt_verify(gpgme_data_t cipher, gpgme_verify_result_t *status, gpgme_ctx_t ctx)
 444 {
 445         struct passphrase_cb_info_s info;
 446         gpgme_data_t plain;
 447         gpgme_error_t err;
 448
 449         memset (&info, 0, sizeof info);
 450
 451         if ((err = gpgme_data_new(&plain)) != GPG_ERR_NO_ERROR) {
 452                 gpgme_release(ctx);
 453                 privacy_set_error(_("Couldn't initialize data, %s"), gpgme_strerror(err));
 454                 return NULL;
 455         }
 456
 457         if (gpgme_get_protocol(ctx) == GPGME_PROTOCOL_OpenPGP) {
 458                 prefs_gpg_enable_agent(prefs_gpg_get_config()->use_gpg_agent);
 459                 if (!getenv("GPG_AGENT_INFO") || !prefs_gpg_get_config()->use_gpg_agent) {
 460                         info.c = ctx;
 461                         gpgme_set_passphrase_cb (ctx, gpgmegtk_passphrase_cb, &info);
 462                 }
 463         } else {
 464                 prefs_gpg_enable_agent(TRUE);
 465                 info.c = ctx;
 466                 gpgme_set_passphrase_cb (ctx, NULL, &info);
 467         }
 468
 469
 470         if (gpgme_get_protocol(ctx) == GPGME_PROTOCOL_OpenPGP) {
 471                 err = gpgme_op_decrypt_verify(ctx, cipher, plain);
 472                 if (err != GPG_ERR_NO_ERROR) {
 473                         debug_print("can't decrypt (%s)\n", gpgme_strerror(err));
 474                         privacy_set_error("%s", gpgme_strerror(err));
 475                         gpgmegtk_free_passphrase();
 476                         gpgme_data_release(plain);
 477                         return NULL;
 478                 }
 479
 480                 err = cm_gpgme_data_rewind(plain);
 481                 if (err) {
 482                         debug_print("can't seek (%d %d %s)\n", err, errno, g_strerror(errno));
 483                 }
 484
 485                 debug_print("decrypted.\n");
 486                 *status = gpgme_op_verify_result (ctx);
 487         } else {
 488                 err = gpgme_op_decrypt(ctx, cipher, plain);
 489                 if (err != GPG_ERR_NO_ERROR) {
 490                         debug_print("can't decrypt (%s)\n", gpgme_strerror(err));
 491                         privacy_set_error("%s", gpgme_strerror(err));
 492                         gpgmegtk_free_passphrase();
 493                         gpgme_data_release(plain);
 494                         return NULL;
 495                 }
 496
 497                 err = cm_gpgme_data_rewind(plain);
 498                 if (err) {
 499                         debug_print("can't seek (%d %d %s)\n", err, errno, g_strerror(errno));
 500                 }
 501
 502                 debug_print("decrypted.\n");
 503                 *status = gpgme_op_verify_result (ctx);
 504         }
 505         return plain;
 506 }
 507
 508 gchar *sgpgme_get_encrypt_data(GSList *recp_names, gpgme_protocol_t proto)
 509 {
 510         SelectionResult result = KEY_SELECTION_CANCEL;
 511         gpgme_key_t *keys = gpgmegtk_recipient_selection(recp_names, &result,
 512                                 proto);
 513         gchar *ret = NULL;
 514         int i = 0;
 515
 516         if (!keys) {
 517                 if (result == KEY_SELECTION_DONT)
 518                         return g_strdup("_DONT_ENCRYPT_");
 519                 else
 520                         return NULL;
 521         }
 522         while (keys[i]) {
 523                 gpgme_subkey_t skey = keys[i]->subkeys;
 524                 gchar *fpr = skey->fpr;
 525                 gchar *tmp = NULL;
 526                 debug_print("adding %s\n", fpr);
 527                 tmp = g_strconcat(ret?ret:"", fpr, " ", NULL);
 528                 g_free(ret);
 529                 ret = tmp;
 530                 i++;
 531         }
 532         return ret;
 533 }
 534
 535 gboolean sgpgme_setup_signers(gpgme_ctx_t ctx, PrefsAccount *account,
 536                               const gchar *from_addr)
 537 {
 538         GPGAccountConfig *config;
 539         const gchar *signer_addr = account->address;
 540
 541         gpgme_signers_clear(ctx);
 542
 543         if (from_addr)
 544                 signer_addr = from_addr;
 545         config = prefs_gpg_account_get_config(account);
 546
 547         switch(config->sign_key) {
 548         case SIGN_KEY_DEFAULT:
 549                 debug_print("using default gnupg key\n");
 550                 break;
 551         case SIGN_KEY_BY_FROM:
 552                 debug_print("using key for %s\n", signer_addr);
 553                 break;
 554         case SIGN_KEY_CUSTOM:
 555                 debug_print("using key for %s\n", config->sign_key_id);
 556                 break;
 557         }
 558
 559         if (config->sign_key != SIGN_KEY_DEFAULT) {
 560                 const gchar *keyid;
 561                 gpgme_key_t key, found_key;
 562                 gpgme_error_t err;
 563
 564                 if (config->sign_key == SIGN_KEY_BY_FROM)
 565                         keyid = signer_addr;
 566                 else if (config->sign_key == SIGN_KEY_CUSTOM)
 567                         keyid = config->sign_key_id;
 568                 else
 569                         goto bail;
 570
 571                 found_key = NULL;
 572                 /* Look for any key, not just private ones, or GPGMe doesn't
 573                  * correctly set the revoked flag. */
 574                 err = gpgme_op_keylist_start(ctx, keyid, 0);
 575                 while ((err = gpgme_op_keylist_next(ctx, &key)) == 0) {
 576                         if (key == NULL)
 577                                 continue;
 578
 579                         if (!key->can_sign)
 580                                 continue;
 581
 582                         if (key->protocol != gpgme_get_protocol(ctx)) {
 583                                 debug_print("skipping a key (wrong protocol %d)\n", key->protocol);
 584                                 gpgme_key_release(key);
 585                                 continue;
 586                         }
 587
 588                         if (key->expired) {
 589                                 debug_print("skipping a key, expired");
 590                                 gpgme_key_release(key);
 591                                 continue;
 592                         }
 593                         if (key->revoked) {
 594                                 debug_print("skipping a key, revoked");
 595                                 gpgme_key_release(key);
 596                                 continue;
 597                         }
 598                         if (key->disabled) {
 599                                 debug_print("skipping a key, disabled");
 600                                 gpgme_key_release(key);
 601                                 continue;
 602                         }
 603
 604                         if (found_key != NULL) {
 605                                 gpgme_key_release(key);
 606                                 gpgme_op_keylist_end(ctx);
 607                                 g_warning("ambiguous specification of secret key '%s'\n", keyid);
 608                                 privacy_set_error(_("Secret key specification is ambiguous"));
 609                                 goto bail;
 610                         }
 611
 612                         found_key = key;
 613                 }
 614                 gpgme_op_keylist_end(ctx);
 615
 616                 if (found_key == NULL) {
 617                         g_warning("setup_signers start: %s", gpgme_strerror(err));
 618                         privacy_set_error(_("Secret key not found (%s)"), gpgme_strerror(err));
 619                         goto bail;
 620                 }
 621
 622                 err = gpgme_signers_add(ctx, found_key);
 623                 debug_print("got key (proto %d (pgp %d, smime %d).\n",
 624                             found_key->protocol, GPGME_PROTOCOL_OpenPGP,
 625                             GPGME_PROTOCOL_CMS);
 626                 gpgme_key_release(found_key);
 627
 628                 if (err) {
 629                         g_warning("error adding secret key: %s\n",
 630                                   gpgme_strerror(err));
 631                         privacy_set_error(_("Error setting secret key: %s"),
 632                                           gpgme_strerror(err));
 633                         goto bail;
 634                 }
 635         }
 636
 637         prefs_gpg_account_free_config(config);
 638
 639         return TRUE;
 640 bail:
 641         prefs_gpg_account_free_config(config);
 642         return FALSE;
 643 }
 644
 645 void sgpgme_init()
 646 {
 647         gchar *ctype_locale = NULL, *messages_locale = NULL;
 648         gchar *ctype_utf8_locale = NULL, *messages_utf8_locale = NULL;
 649
 650         gpgme_engine_info_t engineInfo;
 651         if (gpgme_check_version("1.0.0")) {
 652 #ifdef LC_CTYPE
 653                 debug_print("setting gpgme CTYPE locale\n");
 654 #ifdef G_OS_WIN32
 655                 ctype_locale = g_win32_getlocale();
 656 #else
 657                 ctype_locale = g_strdup(setlocale(LC_CTYPE, NULL));
 658 #endif
 659                 if (ctype_locale) {
 660                         debug_print("setting gpgme CTYPE locale to: %s\n", ctype_locale);
 661                         if (strchr(ctype_locale, '.'))
 662                                 *(strchr(ctype_locale, '.')) = '\0';
 663                         else if (strchr(ctype_locale, '@'))
 664                                 *(strchr(ctype_locale, '@')) = '\0';
 665                         ctype_utf8_locale = g_strconcat(ctype_locale, ".UTF-8", NULL);
 666
 667                         debug_print("setting gpgme locale to UTF8: %s\n", ctype_utf8_locale ? ctype_utf8_locale : "NULL");
 668                         gpgme_set_locale(NULL, LC_CTYPE, ctype_utf8_locale);
 669
 670                         debug_print("done\n");
 671                         g_free(ctype_utf8_locale);
 672                         g_free(ctype_locale);
 673                 } else {
 674                         debug_print("couldn't set gpgme CTYPE locale\n");
 675                 }
 676 #endif
 677 #ifdef LC_MESSAGES
 678                 debug_print("setting gpgme MESSAGES locale\n");
 679 #ifdef G_OS_WIN32
 680                 messages_locale = g_win32_getlocale();
 681 #else
 682                 messages_locale = g_strdup(setlocale(LC_MESSAGES, NULL));
 683 #endif
 684                 if (messages_locale) {
 685                         debug_print("setting gpgme MESSAGES locale to: %s\n", messages_locale);
 686                         if (strchr(messages_locale, '.'))
 687                                 *(strchr(messages_locale, '.')) = '\0';
 688                         else if (strchr(messages_locale, '@'))
 689                                 *(strchr(messages_locale, '@')) = '\0';
 690                         messages_utf8_locale = g_strconcat(messages_locale, ".UTF-8", NULL);
 691                         debug_print("setting gpgme locale to UTF8: %s\n", messages_utf8_locale ? messages_utf8_locale : "NULL");
 692
 693                         gpgme_set_locale(NULL, LC_MESSAGES, messages_utf8_locale);
 694
 695                         debug_print("done\n");
 696                         g_free(messages_utf8_locale);
 697                         g_free(messages_locale);
 698                 } else {
 699                         debug_print("couldn't set gpgme MESSAGES locale\n");
 700                 }
 701 #endif
 702                 if (!gpgme_get_engine_info(&engineInfo)) {
 703                         while (engineInfo) {
 704                                 debug_print("GpgME Protocol: %s\n"
 705                                             "Version: %s (req %s)\n"
 706                                             "Executable: %s\n",
 707                                         gpgme_get_protocol_name(engineInfo->protocol) ? gpgme_get_protocol_name(engineInfo->protocol):"???",
 708                                         engineInfo->version ? engineInfo->version:"???",
 709                                         engineInfo->req_version ? engineInfo->req_version:"???",
 710                                         engineInfo->file_name ? engineInfo->file_name:"???");
 711                                 if (engineInfo->protocol == GPGME_PROTOCOL_OpenPGP
 712                                 &&  gpgme_engine_check_version(engineInfo->protocol) !=
 713                                         GPG_ERR_NO_ERROR) {
 714                                         if (engineInfo->file_name && !engineInfo->version) {
 715                                                 alertpanel_error(_("Gpgme protocol '%s' is unusable: "
 716                                                                    "Engine '%s' isn't installed properly."),
 717                                                                    gpgme_get_protocol_name(engineInfo->protocol),
 718                                                                    engineInfo->file_name);
 719                                         } else if (engineInfo->file_name && engineInfo->version
 720                                           && engineInfo->req_version) {
 721                                                 alertpanel_error(_("Gpgme protocol '%s' is unusable: "
 722                                                                    "Engine '%s' version %s is installed, "
 723                                                                    "but version %s is required.\n"),
 724                                                                    gpgme_get_protocol_name(engineInfo->protocol),
 725                                                                    engineInfo->file_name,
 726                                                                    engineInfo->version,
 727                                                                    engineInfo->req_version);
 728                                         } else {
 729                                                 alertpanel_error(_("Gpgme protocol '%s' is unusable "
 730                                                                    "(unknown problem)"),
 731                                                                    gpgme_get_protocol_name(engineInfo->protocol));
 732                                         }
 733                                 }
 734                                 engineInfo = engineInfo->next;
 735                         }
 736                 }
 737         } else {
 738                 sgpgme_disable_all();
 739
 740                 if (prefs_gpg_get_config()->gpg_warning) {
 741                         AlertValue val;
 742
 743                         val = alertpanel_full
 744                                 (_("Warning"),
 745                                  _("GnuPG is not installed properly, or needs "
 746                                  "to be upgraded.\n"
 747                                  "OpenPGP support disabled."),
 748                                  GTK_STOCK_CLOSE, NULL, NULL, TRUE, NULL,
 749                                  ALERT_WARNING, G_ALERTDEFAULT);
 750                         if (val & G_ALERTDISABLE)
 751                                 prefs_gpg_get_config()->gpg_warning = FALSE;
 752                 }
 753         }
 754 }
 755
 756 void sgpgme_done()
 757 {
 758         gpgmegtk_free_passphrase();
 759 }
 760
 761 void sgpgme_create_secret_key(PrefsAccount *account, gboolean ask_create)
 762 {
 763         AlertValue val = G_ALERTDEFAULT;
 764         gchar *key_parms = NULL;
 765         gchar *name = NULL;
 766         gchar *email = NULL;
 767         gchar *passphrase = NULL, *passphrase_second = NULL;
 768         gint prev_bad = 0;
 769         gchar *tmp = NULL;
 770         gpgme_error_t err = 0;
 771         gpgme_ctx_t ctx;
 772         GtkWidget *window = NULL;
 773         gpgme_genkey_result_t key;
 774
 775         if (account == NULL)
 776                 account = account_get_default();
 777
 778         if (account->address == NULL) {
 779                 alertpanel_error(_("You have to save the account's information with \"OK\" "
 780                                    "before being able to generate a key pair.\n"));
 781                 return;
 782         }
 783         if (ask_create) {
 784                 val = alertpanel(_("No PGP key found"),
 785                                 _("Claws Mail did not find a secret PGP key, "
 786                                   "which means that you won't be able to sign "
 787                                   "emails or receive encrypted emails.\n"
 788                                   "Do you want to create a new key pair now?"),
 789                                   GTK_STOCK_NO, "+" GTK_STOCK_YES, NULL);
 790                 if (val == G_ALERTDEFAULT) {
 791                         prefs_gpg_get_config()->gpg_ask_create_key = FALSE;
 792                         prefs_gpg_save_config();
 793                         return;
 794                 }
 795         }
 796
 797         if (account->name) {
 798                 name = g_strdup(account->name);
 799         } else {
 800                 name = g_strdup(account->address);
 801         }
 802         email = g_strdup(account->address);
 803         tmp = g_strdup_printf("%s <%s>", account->name?account->name:account->address, account->address);
 804 again:
 805         passphrase = passphrase_mbox(tmp, NULL, prev_bad, 1);
 806         if (passphrase == NULL) {
 807                 g_free(tmp);
 808                 g_free(email);
 809                 g_free(name);
 810                 return;
 811         }
 812         passphrase_second = passphrase_mbox(tmp, NULL, 0, 2);
 813         if (passphrase_second == NULL) {
 814                 g_free(tmp);
 815                 g_free(email);
 816                 g_free(passphrase);
 817                 g_free(name);
 818                 return;
 819         }
 820         if (strcmp(passphrase, passphrase_second)) {
 821                 g_free(passphrase);
 822                 g_free(passphrase_second);
 823                 prev_bad = 1;
 824                 goto again;
 825         }
 826
 827         key_parms = g_strdup_printf("<GnupgKeyParms format=\"internal\">\n"
 828                                         "Key-Type: RSA\n"
 829                                         "Key-Length: 2048\n"
 830                                         "Subkey-Type: RSA\n"
 831                                         "Subkey-Length: 2048\n"
 832                                         "Name-Real: %s\n"
 833                                         "Name-Email: %s\n"
 834                                         "Expire-Date: 0\n"
 835                                         "%s%s%s"
 836                                         "</GnupgKeyParms>\n",
 837                                         name, email,
 838                                         strlen(passphrase)?"Passphrase: ":"",
 839                                         passphrase,
 840                                         strlen(passphrase)?"\n":"");
 841 #ifndef G_PLATFORM_WIN32
 842         if (mlock(passphrase, strlen(passphrase)) == -1)
 843                 debug_print("couldn't lock passphrase\n");
 844         if (mlock(passphrase_second, strlen(passphrase_second)) == -1)
 845                 debug_print("couldn't lock passphrase2\n");
 846 #endif
 847         g_free(tmp);
 848         g_free(email);
 849         g_free(name);
 850         g_free(passphrase_second);
 851         g_free(passphrase);
 852
 853         err = gpgme_new (&ctx);
 854         if (err) {
 855                 alertpanel_error(_("Couldn't generate a new key pair: %s"),
 856                                  gpgme_strerror(err));
 857                 g_free(key_parms);
 858                 return;
 859         }
 860
 861
 862         window = label_window_create(_("Generating your new key pair... Please move the mouse "
 863                               "around to help generate entropy..."));
 864
 865         err = gpgme_op_genkey(ctx, key_parms, NULL, NULL);
 866         g_free(key_parms);
 867
 868         label_window_destroy(window);
 869
 870         if (err) {
 871                 alertpanel_error(_("Couldn't generate a new key pair: %s"), gpgme_strerror(err));
 872                 gpgme_release(ctx);
 873                 return;
 874         }
 875         key = gpgme_op_genkey_result(ctx);
 876         if (key == NULL) {
 877                 alertpanel_error(_("Couldn't generate a new key pair: unknown error"));
 878                 gpgme_release(ctx);
 879                 return;
 880         } else {
 881                 gchar *buf = g_strdup_printf(_("Your new key pair has been generated. "
 882                                     "Its fingerprint is:\n%s\n\nDo you want to export it "
 883                                     "to a keyserver?"),
 884                                     key->fpr ? key->fpr:"null");
 885                 AlertValue val = alertpanel(_("Key generated"), buf,
 886                                   GTK_STOCK_NO, "+" GTK_STOCK_YES, NULL);
 887                 g_free(buf);
 888                 if (val == G_ALERTALTERNATE) {
 889 #ifndef G_OS_WIN32
 890                         gchar *cmd = g_strdup_printf("gpg --no-tty --send-keys %s", key->fpr);
 891                         int res = 0;
 892                         pid_t pid = 0;
 893                         pid = fork();
 894                         if (pid == -1) {
 895                                 res = -1;
 896                         } else if (pid == 0) {
 897                                 /* son */
 898                                 res = system(cmd);
 899                                 res = WEXITSTATUS(res);
 900                                 _exit(res);
 901                         } else {
 902                                 int status = 0;
 903                                 time_t start_wait = time(NULL);
 904                                 res = -1;
 905                                 do {
 906                                         if (waitpid(pid, &status, WNOHANG) == 0 || !WIFEXITED(status)) {
 907                                                 usleep(200000);
 908                                         } else {
 909                                                 res = WEXITSTATUS(status);
 910                                                 break;
 911                                         }
 912                                         if (time(NULL) - start_wait > 5) {
 913                                                 debug_print("SIGTERM'ing gpg\n");
 914                                                 kill(pid, SIGTERM);
 915                                         }
 916                                         if (time(NULL) - start_wait > 6) {
 917                                                 debug_print("SIGKILL'ing gpg\n");
 918                                                 kill(pid, SIGKILL);
 919                                                 break;
 920                                         }
 921                                 } while(1);
 922                         }
 923                         if (res == 0) {
 924                                 alertpanel_notice(_("Key exported."));
 925                         } else {
 926                                 alertpanel_error(_("Couldn't export key."));
 927                         }
 928                         g_free(cmd);
 929 #else
 930                         alertpanel_error(_("Key export isn't implemented in Windows."));
 931 #endif
 932                 }
 933         }
 934         prefs_gpg_get_config()->gpg_ask_create_key = FALSE;
 935         prefs_gpg_save_config();
 936         gpgme_release(ctx);
 937 }
 938
 939 gboolean sgpgme_has_secret_key(void)
 940 {
 941         gpgme_error_t err = 0;
 942         gpgme_ctx_t ctx;
 943         gpgme_key_t key;
 944
 945         err = gpgme_new (&ctx);
 946         if (err) {
 947                 debug_print("err : %s\n", gpgme_strerror(err));
 948                 return TRUE;
 949         }
 950 check_again:
 951         err = gpgme_op_keylist_start(ctx, NULL, TRUE);
 952         if (!err)
 953                 err = gpgme_op_keylist_next(ctx, &key);
 954         gpgme_op_keylist_end(ctx);
 955         if (gpg_err_code(err) == GPG_ERR_EOF) {
 956                 if (gpgme_get_protocol(ctx) != GPGME_PROTOCOL_CMS) {
 957                         gpgme_set_protocol(ctx, GPGME_PROTOCOL_CMS);
 958                         goto check_again;
 959                 }
 960                 gpgme_release(ctx);
 961                 return FALSE;
 962         } else {
 963                 gpgme_release(ctx);
 964                 return TRUE;
 965         }
 966 }
 967
 968 void sgpgme_check_create_key(void)
 969 {
 970         if (prefs_gpg_get_config()->gpg_ask_create_key &&
 971             !sgpgme_has_secret_key()) {
 972                 sgpgme_create_secret_key(NULL, TRUE);
 973         } else {
 974                 prefs_gpg_get_config()->gpg_ask_create_key = FALSE;
 975                 prefs_gpg_save_config();
 976         }
 977 }
 978
 979 void *sgpgme_data_release_and_get_mem(gpgme_data_t data, size_t *len)
 980 {
 981         char buf[BUFSIZ];
 982         void *result = NULL;
 983         ssize_t r = 0;
 984         size_t w = 0;
 985
 986         if (data == NULL)
 987                 return NULL;
 988         if (len == NULL)
 989                 return NULL;
 990
 991         /* I know it's deprecated, but we don't compile with _LARGEFILE */
 992         cm_gpgme_data_rewind(data);
 993         while ((r = gpgme_data_read(data, buf, BUFSIZ)) > 0) {
 994                 void *rresult = realloc(result, r + w);
 995                 if (rresult == NULL) {
 996                         g_warning("can't allocate memory\n");
 997                         if (result != NULL)
 998                                 free(result);
 999                         return NULL;
1000                 }
1001                 result = rresult;
1002                 memcpy(result+w, buf, r);
1003                 w += r;
1004         }
1005
1006         *len = w;
1007
1008         gpgme_data_release(data);
1009         if (r < 0) {
1010                 free(result);
1011                 *len = 0;
1012                 return NULL;
1013         }
1014         return result;
1015 }
1016
1017 gpgme_error_t cm_gpgme_data_rewind(gpgme_data_t dh)
1018 {
1019 #if defined(_FILE_OFFSET_BITS) && _FILE_OFFSET_BITS == 64
1020         if (gpgme_data_seek(dh, (off_t)0, SEEK_SET) == -1)
1021                 return gpg_error_from_errno(errno);
1022         else
1023                 return 0;
1024 #else
1025         return gpgme_data_rewind(dh);
1026 #endif
1027 }
1028
1029 #endif /* USE_GPGME */