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 #ifdef HAVE_CONFIG_H
  20 #  include "config.h"
  21 #include "claws-features.h"
  22 #endif
  23
  24 #ifdef USE_GPGME
  25
  26 #include <time.h>
  27 #include <gtk/gtk.h>
  28 #include <gpgme.h>
  29 #include <glib.h>
  30 #include <glib/gi18n.h>
  31 #include <stdio.h>
  32 #include <string.h>
  33 #include <stdlib.h>
  34 #include <errno.h>
  35 #include <sys/types.h>
  36 #ifndef G_OS_WIN32
  37 #  include <sys/wait.h>
  38 #endif
  39 #if (defined(__DragonFly__) || defined(SOLARIS) || defined (__NetBSD__) || defined (__FreeBSD__) || defined (__OpenBSD__))
  40 #  include <sys/signal.h>
  41 #endif
  42 #ifndef G_OS_WIN32
  43 #include <sys/mman.h>
  44 #endif
  45 #if HAVE_LOCALE_H
  46 #  include <locale.h>
  47 #endif
  48
  49 #include "sgpgme.h"
  50 #include "privacy.h"
  51 #include "prefs_common.h"
  52 #include "utils.h"
  53 #include "alertpanel.h"
  54 #include "passphrase.h"
  55 #include "prefs_gpg.h"
  56 #include "account.h"
  57 #include "select-keys.h"
  58
  59 static void sgpgme_disable_all(void)
  60 {
  61     /* FIXME: set a flag, so that we don't bother the user with failed
  62      * gpgme messages */
  63 }
  64
  65 gpgme_verify_result_t sgpgme_verify_signature(gpgme_ctx_t ctx, gpgme_data_t sig,
  66                                         gpgme_data_t plain, gpgme_data_t dummy)
  67 {
  68         gpgme_verify_result_t status = NULL;
  69         gpgme_error_t err;
  70
  71         if ((err = gpgme_op_verify(ctx, sig, plain, dummy)) != GPG_ERR_NO_ERROR) {
  72                 debug_print("op_verify err %s\n", gpgme_strerror(err));
  73                 privacy_set_error("%s", gpgme_strerror(err));
  74                 return GINT_TO_POINTER(-GPG_ERR_SYSTEM_ERROR);
  75         }
  76         status = gpgme_op_verify_result(ctx);
  77         if (status && status->signatures == NULL) {
  78                 debug_print("no signature found\n");
  79                 privacy_set_error(_("No signature found"));
  80                 return GINT_TO_POINTER(-GPG_ERR_SYSTEM_ERROR);
  81         }
  82         return status;
  83 }
  84
  85 SignatureStatus sgpgme_sigstat_gpgme_to_privacy(gpgme_ctx_t ctx, gpgme_verify_result_t status)
  86 {
  87         gpgme_signature_t sig = NULL;
  88
  89         if (GPOINTER_TO_INT(status) == -GPG_ERR_SYSTEM_ERROR) {
  90                 debug_print("system error\n");
  91                 return SIGNATURE_CHECK_FAILED;
  92         }
  93
  94         if (status == NULL) {
  95                 debug_print("status == NULL\n");
  96                 return SIGNATURE_UNCHECKED;
  97         }
  98         sig = status->signatures;
  99
 100         if (sig == NULL) {
 101                 debug_print("sig == NULL\n");
 102                 return SIGNATURE_UNCHECKED;
 103         }
 104
 105         debug_print("err code %d\n", gpg_err_code(sig->status));
 106         switch (gpg_err_code(sig->status)) {
 107         case GPG_ERR_NO_ERROR:
 108                 switch (sig->validity) {
 109                 case GPGME_VALIDITY_NEVER:
 110                         return SIGNATURE_INVALID;
 111                 case GPGME_VALIDITY_UNKNOWN:
 112                 case GPGME_VALIDITY_UNDEFINED:
 113                 case GPGME_VALIDITY_MARGINAL:
 114                 case GPGME_VALIDITY_FULL:
 115                 case GPGME_VALIDITY_ULTIMATE:
 116                         return SIGNATURE_OK;
 117                 default:
 118                         return SIGNATURE_CHECK_FAILED;
 119                 }
 120         case GPG_ERR_SIG_EXPIRED:
 121         case GPG_ERR_CERT_REVOKED:
 122                 return SIGNATURE_WARN;
 123         case GPG_ERR_KEY_EXPIRED:
 124                 return SIGNATURE_KEY_EXPIRED;
 125         case GPG_ERR_BAD_SIGNATURE:
 126                 return SIGNATURE_INVALID;
 127         case GPG_ERR_NO_PUBKEY:
 128                 return SIGNATURE_CHECK_FAILED;
 129         default:
 130                 return SIGNATURE_CHECK_FAILED;
 131         }
 132         return SIGNATURE_CHECK_FAILED;
 133 }
 134
 135 static const gchar *get_validity_str(unsigned long validity)
 136 {
 137         switch (gpg_err_code(validity)) {
 138         case GPGME_VALIDITY_UNKNOWN:
 139                 return _("Unknown");
 140         case GPGME_VALIDITY_UNDEFINED:
 141                 return _("Undefined");
 142         case GPGME_VALIDITY_NEVER:
 143                 return _("Never");
 144         case GPGME_VALIDITY_MARGINAL:
 145                 return _("Marginal");
 146         case GPGME_VALIDITY_FULL:
 147                 return _("Full");
 148         case GPGME_VALIDITY_ULTIMATE:
 149                 return _("Ultimate");
 150         default:
 151                 return _("Error");
 152         }
 153 }
 154
 155 static const gchar *get_owner_trust_str(unsigned long owner_trust)
 156 {
 157         switch (gpgme_err_code(owner_trust)) {
 158         case GPGME_VALIDITY_NEVER:
 159                 return _("Untrusted");
 160         case GPGME_VALIDITY_MARGINAL:
 161                 return _("Marginal");
 162         case GPGME_VALIDITY_FULL:
 163                 return _("Full");
 164         case GPGME_VALIDITY_ULTIMATE:
 165                 return _("Ultimate");
 166         default:
 167                 return _("Unknown");
 168         }
 169 }
 170
 171 static gchar *extract_name(const char *uid)
 172 {
 173         if (uid == NULL)
 174                 return NULL;
 175         if (!strncmp(uid, "CN=", 3)) {
 176                 gchar *result = g_strdup(uid+3);
 177                 if (strstr(result, ","))
 178                         *(strstr(result, ",")) = '\0';
 179                 return result;
 180         } else if (strstr(uid, ",CN=")) {
 181                 gchar *result = g_strdup(strstr(uid, ",CN=")+4);
 182                 if (strstr(result, ","))
 183                         *(strstr(result, ",")) = '\0';
 184                 return result;
 185         } else {
 186                 return g_strdup(uid);
 187         }
 188 }
 189 gchar *sgpgme_sigstat_info_short(gpgme_ctx_t ctx, gpgme_verify_result_t status)
 190 {
 191         gpgme_signature_t sig = NULL;
 192         gchar *uname = NULL;
 193         gpgme_key_t key;
 194         gchar *result = NULL;
 195         gpgme_error_t err = 0;
 196         static gboolean warned = FALSE;
 197
 198         if (GPOINTER_TO_INT(status) == -GPG_ERR_SYSTEM_ERROR) {
 199                 return g_strdup_printf(_("The signature can't be checked - %s"), privacy_get_error());
 200         }
 201
 202         if (status == NULL) {
 203                 return g_strdup(_("The signature has not been checked."));
 204         }
 205         sig = status->signatures;
 206         if (sig == NULL) {
 207                 return g_strdup(_("The signature has not been checked."));
 208         }
 209
 210         err = gpgme_get_key(ctx, sig->fpr, &key, 0);
 211         if (gpg_err_code(err) == GPG_ERR_NO_AGENT) {
 212                 if (!warned)
 213                         alertpanel_error(_("PGP Core: Can't get key - no gpg-agent running."));
 214                 else
 215                         g_warning("PGP Core: Can't get key - no gpg-agent running.");
 216                 warned = TRUE;
 217         } else if (gpg_err_code(err) != GPG_ERR_NO_ERROR && gpg_err_code(err) != GPG_ERR_EOF) {
 218                 return g_strdup_printf(_("The signature can't be checked - %s"),
 219                         gpgme_strerror(err));
 220   }
 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 && 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                         if (key) {
 244                                 result = g_strdup_printf(_("Good signature from \"%s\""), uname);
 245                         } else {
 246                                 gchar *id = g_strdup(sig->fpr + strlen(sig->fpr)-8);
 247                                 result = g_strdup_printf(_("Key 0x%s not available to verify this signature"), id);
 248                                 g_free(id);
 249                         }
 250                         break;
 251                }
 252                 break;
 253         case GPG_ERR_SIG_EXPIRED:
 254                 result = g_strdup_printf(_("Expired signature from \"%s\""), uname);
 255                 break;
 256         case GPG_ERR_KEY_EXPIRED:
 257                 result = g_strdup_printf(_("Good signature from \"%s\", but the key has expired"), uname);
 258                 break;
 259         case GPG_ERR_CERT_REVOKED:
 260                 result = g_strdup_printf(_("Good signature from \"%s\", but the key has been revoked"), uname);
 261                 break;
 262         case GPG_ERR_BAD_SIGNATURE:
 263                 result = g_strdup_printf(_("Bad signature from \"%s\""), uname);
 264                 break;
 265         case GPG_ERR_NO_PUBKEY: {
 266                 gchar *id = g_strdup(sig->fpr + strlen(sig->fpr)-8);
 267                 result = g_strdup_printf(_("Key 0x%s not available to verify this signature"), id);
 268                 g_free(id);
 269                 break;
 270                 }
 271         default:
 272                 result = g_strdup(_("The signature has not been checked"));
 273                 break;
 274         }
 275         if (result == NULL)
 276                 result = g_strdup(_("Error"));
 277         g_free(uname);
 278         return result;
 279 }
 280
 281 gchar *sgpgme_sigstat_info_full(gpgme_ctx_t ctx, gpgme_verify_result_t status)
 282 {
 283         gint i = 0;
 284         gchar *ret;
 285         GString *siginfo;
 286         gpgme_signature_t sig = NULL;
 287
 288         siginfo = g_string_sized_new(64);
 289         if (status == NULL) {
 290                 g_string_append_printf(siginfo,
 291                         _("Error checking signature: no status\n"));
 292                 goto bail;
 293          }
 294
 295         sig = status->signatures;
 296
 297         while (sig) {
 298                 char buf[100];
 299                 struct tm lt;
 300                 gpgme_key_t key;
 301                 gpgme_error_t err;
 302                 const gchar *keytype, *keyid, *uid;
 303
 304                 err = gpgme_get_key(ctx, sig->fpr, &key, 0);
 305
 306                 if (err != GPG_ERR_NO_ERROR) {
 307                         key = NULL;
 308                         g_string_append_printf(siginfo,
 309                                 _("Error checking signature: %s\n"),
 310                                 gpgme_strerror(err));
 311                         goto bail;
 312                 }
 313                 if (key) {
 314                         keytype = gpgme_pubkey_algo_name(
 315                                         key->subkeys->pubkey_algo);
 316                         keyid = key->subkeys->keyid;
 317                         uid = key->uids->uid;
 318                 } else {
 319                         keytype = "?";
 320                         keyid = "?";
 321                         uid = "?";
 322                 }
 323
 324                 memset(buf, 0, sizeof(buf));
 325                 fast_strftime(buf, sizeof(buf)-1, prefs_common_get_prefs()->date_format, localtime_r(&sig->timestamp, &lt));
 326                 g_string_append_printf(siginfo,
 327                         _("Signature made on %s using %s key ID %s\n"),
 328                         buf, keytype, keyid);
 329
 330                 switch (gpg_err_code(sig->status)) {
 331                 case GPG_ERR_NO_ERROR:
 332                         g_string_append_printf(siginfo,
 333                                 _("Good signature from uid \"%s\" (Validity: %s)\n"),
 334                                 uid, get_validity_str((key && key->uids) ? key->uids->validity:GPGME_VALIDITY_UNKNOWN));
 335                         break;
 336                 case GPG_ERR_KEY_EXPIRED:
 337                         g_string_append_printf(siginfo,
 338                                 _("Expired key uid \"%s\"\n"),
 339                                 uid);
 340                         break;
 341                 case GPG_ERR_SIG_EXPIRED:
 342                         g_string_append_printf(siginfo,
 343                                 _("Expired signature from uid \"%s\" (Validity: %s)\n"),
 344                                 uid, get_validity_str((key && key->uids) ? key->uids->validity:GPGME_VALIDITY_UNKNOWN));
 345                         break;
 346                 case GPG_ERR_CERT_REVOKED:
 347                         g_string_append_printf(siginfo,
 348                                 _("Revoked key uid \"%s\"\n"),
 349                                 uid);
 350                         break;
 351                 case GPG_ERR_BAD_SIGNATURE:
 352                         g_string_append_printf(siginfo,
 353                                 _("BAD signature from \"%s\"\n"),
 354                                 uid);
 355                         break;
 356                 default:
 357                         break;
 358                 }
 359                 if (sig->status != GPG_ERR_BAD_SIGNATURE) {
 360                         gint j = 1;
 361                         if (key) {
 362                                 key->uids = key->uids ? key->uids->next : NULL;
 363                                 while (key->uids != NULL) {
 364                                         g_string_append_printf(siginfo,
 365                                                 g_strconcat("                    ",
 366                                                             _("uid \"%s\" (Validity: %s)\n"), NULL),
 367                                                 key->uids->uid,
 368                                                 key->uids->revoked==TRUE?_("Revoked"):get_validity_str(key->uids->validity));
 369                                         j++;
 370                                         key->uids = key->uids->next;
 371                                 }
 372                         }
 373                         g_string_append_printf(siginfo,_("Owner Trust: %s\n"),
 374                                                key ? get_owner_trust_str(key->owner_trust) : _("No key!"));
 375                         g_string_append(siginfo,
 376                                 _("Primary key fingerprint:"));
 377                         const char* primary_fpr = NULL;
 378                         if (key && key->subkeys && key->subkeys->fpr)
 379                                 primary_fpr = key->subkeys->fpr;
 380                         else
 381                                 g_string_append(siginfo, " ?");
 382                         int idx; /* now pretty-print the fingerprint */
 383                         for (idx=0; primary_fpr && *primary_fpr!='\0'; idx++, primary_fpr++) {
 384                                 if (idx%4==0)
 385                                         g_string_append_c(siginfo, ' ');
 386                                 if (idx%20==0)
 387                                         g_string_append_c(siginfo, ' ');
 388                                 g_string_append_c(siginfo, (gchar)*primary_fpr);
 389                         }
 390                         g_string_append_c(siginfo, '\n');
 391 #ifdef HAVE_GPGME_PKA_TRUST
 392                         if (sig->pka_trust == 1 && sig->pka_address) {
 393                                 g_string_append_printf(siginfo,
 394                                    _("WARNING: Signer's address \"%s\" "
 395                                       "does not match DNS entry\n"),
 396                                    sig->pka_address);
 397                         }
 398                         else if (sig->pka_trust == 2 && sig->pka_address) {
 399                                 g_string_append_printf(siginfo,
 400                                    _("Verified signer's address is \"%s\"\n"),
 401                                    sig->pka_address);
 402                                 /* FIXME: Compare the address to the
 403                                  * From: address.  */
 404                         }
 405 #endif /*HAVE_GPGME_PKA_TRUST*/
 406                 }
 407
 408                 g_string_append(siginfo, "\n");
 409                 i++;
 410                 sig = sig->next;
 411         }
 412 bail:
 413         ret = siginfo->str;
 414         g_string_free(siginfo, FALSE);
 415         return ret;
 416 }
 417
 418 gpgme_data_t sgpgme_data_from_mimeinfo(MimeInfo *mimeinfo)
 419 {
 420         gpgme_data_t data = NULL;
 421         gpgme_error_t err;
 422         FILE *fp = g_fopen(mimeinfo->data.filename, "rb");
 423
 424         if (!fp)
 425                 return NULL;
 426
 427         err = gpgme_data_new_from_filepart(&data, NULL, fp, mimeinfo->offset, mimeinfo->length);
 428         fclose(fp);
 429
 430         debug_print("data %p (%d %d)\n", (void *)&data, mimeinfo->offset, mimeinfo->length);
 431         if (err) {
 432                 debug_print ("gpgme_data_new_from_file failed: %s\n",
 433                              gpgme_strerror (err));
 434                 privacy_set_error(_("Couldn't get data from message, %s"), gpgme_strerror(err));
 435                 return NULL;
 436         }
 437         return data;
 438 }
 439
 440 gpgme_data_t sgpgme_decrypt_verify(gpgme_data_t cipher, gpgme_verify_result_t *status, gpgme_ctx_t ctx)
 441 {
 442         struct passphrase_cb_info_s info;
 443         gpgme_data_t plain;
 444         gpgme_error_t err;
 445
 446         memset (&info, 0, sizeof info);
 447
 448         if ((err = gpgme_data_new(&plain)) != GPG_ERR_NO_ERROR) {
 449                 gpgme_release(ctx);
 450                 privacy_set_error(_("Couldn't initialize data, %s"), gpgme_strerror(err));
 451                 return NULL;
 452         }
 453
 454         if (gpgme_get_protocol(ctx) == GPGME_PROTOCOL_OpenPGP) {
 455                 prefs_gpg_enable_agent(prefs_gpg_get_config()->use_gpg_agent);
 456                 if (!g_getenv("GPG_AGENT_INFO") || !prefs_gpg_get_config()->use_gpg_agent) {
 457                         info.c = ctx;
 458                         gpgme_set_passphrase_cb (ctx, gpgmegtk_passphrase_cb, &info);
 459                 }
 460         } else {
 461                 prefs_gpg_enable_agent(TRUE);
 462                 info.c = ctx;
 463                 gpgme_set_passphrase_cb (ctx, NULL, &info);
 464         }
 465
 466
 467         if (gpgme_get_protocol(ctx) == GPGME_PROTOCOL_OpenPGP) {
 468                 err = gpgme_op_decrypt_verify(ctx, cipher, plain);
 469                 if (err != GPG_ERR_NO_ERROR) {
 470                         debug_print("can't decrypt (%s)\n", gpgme_strerror(err));
 471                         privacy_set_error("%s", gpgme_strerror(err));
 472                         gpgmegtk_free_passphrase();
 473                         gpgme_data_release(plain);
 474                         return NULL;
 475                 }
 476
 477                 err = cm_gpgme_data_rewind(plain);
 478                 if (err) {
 479                         debug_print("can't seek (%d %d %s)\n", err, errno, g_strerror(errno));
 480                 }
 481
 482                 debug_print("decrypted.\n");
 483                 *status = gpgme_op_verify_result (ctx);
 484         } else {
 485                 err = gpgme_op_decrypt(ctx, cipher, plain);
 486                 if (err != GPG_ERR_NO_ERROR) {
 487                         debug_print("can't decrypt (%s)\n", gpgme_strerror(err));
 488                         privacy_set_error("%s", gpgme_strerror(err));
 489                         gpgmegtk_free_passphrase();
 490                         gpgme_data_release(plain);
 491                         return NULL;
 492                 }
 493
 494                 err = cm_gpgme_data_rewind(plain);
 495                 if (err) {
 496                         debug_print("can't seek (%d %d %s)\n", err, errno, g_strerror(errno));
 497                 }
 498
 499                 debug_print("decrypted.\n");
 500                 *status = gpgme_op_verify_result (ctx);
 501         }
 502         return plain;
 503 }
 504
 505 gchar *sgpgme_get_encrypt_data(GSList *recp_names, gpgme_protocol_t proto)
 506 {
 507         SelectionResult result = KEY_SELECTION_CANCEL;
 508         gpgme_key_t *keys = gpgmegtk_recipient_selection(recp_names, &result,
 509                                 proto);
 510         gchar *ret = NULL;
 511         int i = 0;
 512
 513         if (!keys) {
 514                 if (result == KEY_SELECTION_DONT)
 515                         return g_strdup("_DONT_ENCRYPT_");
 516                 else
 517                         return NULL;
 518         }
 519         while (keys[i]) {
 520                 gpgme_subkey_t skey = keys[i]->subkeys;
 521                 gchar *fpr = skey->fpr;
 522                 gchar *tmp = NULL;
 523                 debug_print("adding %s\n", fpr);
 524                 tmp = g_strconcat(ret?ret:"", fpr, " ", NULL);
 525                 g_free(ret);
 526                 ret = tmp;
 527                 i++;
 528         }
 529         return ret;
 530 }
 531
 532 gboolean sgpgme_setup_signers(gpgme_ctx_t ctx, PrefsAccount *account,
 533                               const gchar *from_addr)
 534 {
 535         GPGAccountConfig *config;
 536         const gchar *signer_addr = account->address;
 537
 538         gpgme_signers_clear(ctx);
 539
 540         if (from_addr)
 541                 signer_addr = from_addr;
 542         config = prefs_gpg_account_get_config(account);
 543
 544         switch(config->sign_key) {
 545         case SIGN_KEY_DEFAULT:
 546                 debug_print("using default gnupg key\n");
 547                 break;
 548         case SIGN_KEY_BY_FROM:
 549                 debug_print("using key for %s\n", signer_addr);
 550                 break;
 551         case SIGN_KEY_CUSTOM:
 552                 debug_print("using key for %s\n", config->sign_key_id);
 553                 break;
 554         }
 555
 556         if (config->sign_key != SIGN_KEY_DEFAULT) {
 557                 const gchar *keyid;
 558                 gpgme_key_t key, found_key;
 559                 gpgme_error_t err;
 560
 561                 if (config->sign_key == SIGN_KEY_BY_FROM)
 562                         keyid = signer_addr;
 563                 else if (config->sign_key == SIGN_KEY_CUSTOM)
 564                         keyid = config->sign_key_id;
 565                 else
 566                         goto bail;
 567
 568                 found_key = NULL;
 569                 /* Look for any key, not just private ones, or GPGMe doesn't
 570                  * correctly set the revoked flag. */
 571                 err = gpgme_op_keylist_start(ctx, keyid, 0);
 572                 while ((err = gpgme_op_keylist_next(ctx, &key)) == 0) {
 573                         if (key == NULL)
 574                                 continue;
 575
 576                         if (!key->can_sign)
 577                                 continue;
 578
 579                         if (key->protocol != gpgme_get_protocol(ctx)) {
 580                                 debug_print("skipping a key (wrong protocol %d)\n", key->protocol);
 581                                 gpgme_key_release(key);
 582                                 continue;
 583                         }
 584
 585                         if (key->expired) {
 586                                 debug_print("skipping a key, expired");
 587                                 gpgme_key_release(key);
 588                                 continue;
 589                         }
 590                         if (key->revoked) {
 591                                 debug_print("skipping a key, revoked");
 592                                 gpgme_key_release(key);
 593                                 continue;
 594                         }
 595                         if (key->disabled) {
 596                                 debug_print("skipping a key, disabled");
 597                                 gpgme_key_release(key);
 598                                 continue;
 599                         }
 600
 601                         if (found_key != NULL) {
 602                                 gpgme_key_release(key);
 603                                 gpgme_op_keylist_end(ctx);
 604                                 g_warning("ambiguous specification of secret key '%s'", keyid);
 605                                 privacy_set_error(_("Secret key specification is ambiguous"));
 606                                 goto bail;
 607                         }
 608
 609                         found_key = key;
 610                 }
 611                 gpgme_op_keylist_end(ctx);
 612
 613                 if (found_key == NULL) {
 614                         g_warning("setup_signers start: %s", gpgme_strerror(err));
 615                         privacy_set_error(_("Secret key not found (%s)"), gpgme_strerror(err));
 616                         goto bail;
 617                 }
 618
 619                 err = gpgme_signers_add(ctx, found_key);
 620                 debug_print("got key (proto %d (pgp %d, smime %d).\n",
 621                             found_key->protocol, GPGME_PROTOCOL_OpenPGP,
 622                             GPGME_PROTOCOL_CMS);
 623                 gpgme_key_release(found_key);
 624
 625                 if (err) {
 626                         g_warning("error adding secret key: %s",
 627                                   gpgme_strerror(err));
 628                         privacy_set_error(_("Error setting secret key: %s"),
 629                                           gpgme_strerror(err));
 630                         goto bail;
 631                 }
 632         }
 633
 634         prefs_gpg_account_free_config(config);
 635
 636         return TRUE;
 637 bail:
 638         prefs_gpg_account_free_config(config);
 639         return FALSE;
 640 }
 641
 642 void sgpgme_init()
 643 {
 644         gchar *ctype_locale = NULL, *messages_locale = NULL;
 645         gchar *ctype_utf8_locale = NULL, *messages_utf8_locale = NULL;
 646
 647         gpgme_engine_info_t engineInfo;
 648
 649         if (strcmp(prefs_gpg_get_config()->gpg_path, "") != 0 &&
 650             access(prefs_gpg_get_config()->gpg_path, X_OK) != -1)
 651                 gpgme_set_engine_info(GPGME_PROTOCOL_OpenPGP,prefs_gpg_get_config()->gpg_path, NULL);
 652
 653         if (gpgme_check_version("1.0.0")) {
 654 #ifdef LC_CTYPE
 655                 debug_print("setting gpgme CTYPE locale\n");
 656 #ifdef G_OS_WIN32
 657                 ctype_locale = g_win32_getlocale();
 658 #else
 659                 ctype_locale = g_strdup(setlocale(LC_CTYPE, NULL));
 660 #endif
 661                 if (ctype_locale) {
 662                         debug_print("setting gpgme CTYPE locale to: %s\n", ctype_locale);
 663                         if (strchr(ctype_locale, '.'))
 664                                 *(strchr(ctype_locale, '.')) = '\0';
 665                         else if (strchr(ctype_locale, '@'))
 666                                 *(strchr(ctype_locale, '@')) = '\0';
 667                         ctype_utf8_locale = g_strconcat(ctype_locale, ".UTF-8", NULL);
 668
 669                         debug_print("setting gpgme locale to UTF8: %s\n", ctype_utf8_locale ? ctype_utf8_locale : "NULL");
 670                         gpgme_set_locale(NULL, LC_CTYPE, ctype_utf8_locale);
 671
 672                         debug_print("done\n");
 673                         g_free(ctype_utf8_locale);
 674                         g_free(ctype_locale);
 675                 } else {
 676                         debug_print("couldn't set gpgme CTYPE locale\n");
 677                 }
 678 #endif
 679 #ifdef LC_MESSAGES
 680                 debug_print("setting gpgme MESSAGES locale\n");
 681 #ifdef G_OS_WIN32
 682                 messages_locale = g_win32_getlocale();
 683 #else
 684                 messages_locale = g_strdup(setlocale(LC_MESSAGES, NULL));
 685 #endif
 686                 if (messages_locale) {
 687                         debug_print("setting gpgme MESSAGES locale to: %s\n", messages_locale);
 688                         if (strchr(messages_locale, '.'))
 689                                 *(strchr(messages_locale, '.')) = '\0';
 690                         else if (strchr(messages_locale, '@'))
 691                                 *(strchr(messages_locale, '@')) = '\0';
 692                         messages_utf8_locale = g_strconcat(messages_locale, ".UTF-8", NULL);
 693                         debug_print("setting gpgme locale to UTF8: %s\n", messages_utf8_locale ? messages_utf8_locale : "NULL");
 694
 695                         gpgme_set_locale(NULL, LC_MESSAGES, messages_utf8_locale);
 696
 697                         debug_print("done\n");
 698                         g_free(messages_utf8_locale);
 699                         g_free(messages_locale);
 700                 } else {
 701                         debug_print("couldn't set gpgme MESSAGES locale\n");
 702                 }
 703 #endif
 704                 if (!gpgme_get_engine_info(&engineInfo)) {
 705                         while (engineInfo) {
 706                                 debug_print("GpgME Protocol: %s\n"
 707                                             "Version: %s (req %s)\n"
 708                                             "Executable: %s\n",
 709                                         gpgme_get_protocol_name(engineInfo->protocol) ? gpgme_get_protocol_name(engineInfo->protocol):"???",
 710                                         engineInfo->version ? engineInfo->version:"???",
 711                                         engineInfo->req_version ? engineInfo->req_version:"???",
 712                                         engineInfo->file_name ? engineInfo->file_name:"???");
 713                                 if (engineInfo->protocol == GPGME_PROTOCOL_OpenPGP
 714                                 &&  gpgme_engine_check_version(engineInfo->protocol) !=
 715                                         GPG_ERR_NO_ERROR) {
 716                                         if (engineInfo->file_name && !engineInfo->version) {
 717                                                 alertpanel_error(_("Gpgme protocol '%s' is unusable: "
 718                                                                    "Engine '%s' isn't installed properly."),
 719                                                                    gpgme_get_protocol_name(engineInfo->protocol),
 720                                                                    engineInfo->file_name);
 721                                         } else if (engineInfo->file_name && engineInfo->version
 722                                           && engineInfo->req_version) {
 723                                                 alertpanel_error(_("Gpgme protocol '%s' is unusable: "
 724                                                                    "Engine '%s' version %s is installed, "
 725                                                                    "but version %s is required.\n"),
 726                                                                    gpgme_get_protocol_name(engineInfo->protocol),
 727                                                                    engineInfo->file_name,
 728                                                                    engineInfo->version,
 729                                                                    engineInfo->req_version);
 730                                         } else {
 731                                                 alertpanel_error(_("Gpgme protocol '%s' is unusable "
 732                                                                    "(unknown problem)"),
 733                                                                    gpgme_get_protocol_name(engineInfo->protocol));
 734                                         }
 735                                 }
 736                                 engineInfo = engineInfo->next;
 737                         }
 738                 }
 739         } else {
 740                 sgpgme_disable_all();
 741
 742                 if (prefs_gpg_get_config()->gpg_warning) {
 743                         AlertValue val;
 744
 745                         val = alertpanel_full
 746                                 (_("Warning"),
 747                                  _("GnuPG is not installed properly, or needs "
 748                                  "to be upgraded.\n"
 749                                  "OpenPGP support disabled."),
 750                                  GTK_STOCK_CLOSE, NULL, NULL, TRUE, NULL,
 751                                  ALERT_WARNING, G_ALERTDEFAULT);
 752                         if (val & G_ALERTDISABLE)
 753                                 prefs_gpg_get_config()->gpg_warning = FALSE;
 754                 }
 755         }
 756 }
 757
 758 void sgpgme_done()
 759 {
 760         gpgmegtk_free_passphrase();
 761 }
 762
 763 void sgpgme_create_secret_key(PrefsAccount *account, gboolean ask_create)
 764 {
 765         AlertValue val = G_ALERTDEFAULT;
 766         gchar *key_parms = NULL;
 767         gchar *name = NULL;
 768         gchar *email = NULL;
 769         gchar *passphrase = NULL, *passphrase_second = NULL;
 770         gint prev_bad = 0;
 771         gchar *tmp = NULL;
 772         gpgme_error_t err = 0;
 773         gpgme_ctx_t ctx;
 774         GtkWidget *window = NULL;
 775         gpgme_genkey_result_t key;
 776
 777         if (account == NULL)
 778                 account = account_get_default();
 779
 780         if (account->address == NULL) {
 781                 alertpanel_error(_("You have to save the account's information with \"OK\" "
 782                                    "before being able to generate a key pair.\n"));
 783                 return;
 784         }
 785         if (ask_create) {
 786                 val = alertpanel(_("No PGP key found"),
 787                                 _("Claws Mail did not find a secret PGP key, "
 788                                   "which means that you won't be able to sign "
 789                                   "emails or receive encrypted emails.\n"
 790                                   "Do you want to create a new key pair now?"),
 791                                   GTK_STOCK_NO, "+" GTK_STOCK_YES, NULL);
 792                 if (val == G_ALERTDEFAULT) {
 793                         prefs_gpg_get_config()->gpg_ask_create_key = FALSE;
 794                         prefs_gpg_save_config();
 795                         return;
 796                 }
 797         }
 798
 799         if (account->name) {
 800                 name = g_strdup(account->name);
 801         } else {
 802                 name = g_strdup(account->address);
 803         }
 804         email = g_strdup(account->address);
 805         tmp = g_strdup_printf("%s <%s>", account->name?account->name:account->address, account->address);
 806 again:
 807         passphrase = passphrase_mbox(tmp, NULL, prev_bad, 1);
 808         if (passphrase == NULL) {
 809                 g_free(tmp);
 810                 g_free(email);
 811                 g_free(name);
 812                 return;
 813         }
 814         passphrase_second = passphrase_mbox(tmp, NULL, 0, 2);
 815         if (passphrase_second == NULL) {
 816                 g_free(tmp);
 817                 g_free(email);
 818                 g_free(passphrase);
 819                 g_free(name);
 820                 return;
 821         }
 822         if (strcmp(passphrase, passphrase_second)) {
 823                 g_free(passphrase);
 824                 g_free(passphrase_second);
 825                 prev_bad = 1;
 826                 goto again;
 827         }
 828
 829         key_parms = g_strdup_printf("<GnupgKeyParms format=\"internal\">\n"
 830                                         "Key-Type: RSA\n"
 831                                         "Key-Length: 2048\n"
 832                                         "Subkey-Type: RSA\n"
 833                                         "Subkey-Length: 2048\n"
 834                                         "Name-Real: %s\n"
 835                                         "Name-Email: %s\n"
 836                                         "Expire-Date: 0\n"
 837                                         "%s%s%s"
 838                                         "</GnupgKeyParms>\n",
 839                                         name, email,
 840                                         strlen(passphrase)?"Passphrase: ":"",
 841                                         passphrase,
 842                                         strlen(passphrase)?"\n":"");
 843 #ifndef G_PLATFORM_WIN32
 844         if (mlock(passphrase, strlen(passphrase)) == -1)
 845                 debug_print("couldn't lock passphrase\n");
 846         if (mlock(passphrase_second, strlen(passphrase_second)) == -1)
 847                 debug_print("couldn't lock passphrase2\n");
 848 #endif
 849         g_free(tmp);
 850         g_free(email);
 851         g_free(name);
 852         g_free(passphrase_second);
 853         g_free(passphrase);
 854
 855         err = gpgme_new (&ctx);
 856         if (err) {
 857                 alertpanel_error(_("Couldn't generate a new key pair: %s"),
 858                                  gpgme_strerror(err));
 859                 g_free(key_parms);
 860                 return;
 861         }
 862
 863
 864         window = label_window_create(_("Generating your new key pair... Please move the mouse "
 865                               "around to help generate entropy..."));
 866
 867         err = gpgme_op_genkey(ctx, key_parms, NULL, NULL);
 868         g_free(key_parms);
 869
 870         label_window_destroy(window);
 871
 872         if (err) {
 873                 alertpanel_error(_("Couldn't generate a new key pair: %s"), gpgme_strerror(err));
 874                 gpgme_release(ctx);
 875                 return;
 876         }
 877         key = gpgme_op_genkey_result(ctx);
 878         if (key == NULL) {
 879                 alertpanel_error(_("Couldn't generate a new key pair: unknown error"));
 880                 gpgme_release(ctx);
 881                 return;
 882         } else {
 883                 gchar *buf = g_strdup_printf(_("Your new key pair has been generated. "
 884                                     "Its fingerprint is:\n%s\n\nDo you want to export it "
 885                                     "to a keyserver?"),
 886                                     key->fpr ? key->fpr:"null");
 887                 AlertValue val = alertpanel(_("Key generated"), buf,
 888                                   GTK_STOCK_NO, "+" GTK_STOCK_YES, NULL);
 889                 g_free(buf);
 890                 if (val == G_ALERTALTERNATE) {
 891 #ifndef G_OS_WIN32
 892                         gchar *cmd = g_strdup_printf("gpg --no-tty --send-keys %s", key->fpr);
 893                         int res = 0;
 894                         pid_t pid = 0;
 895                         pid = fork();
 896                         if (pid == -1) {
 897                                 res = -1;
 898                         } else if (pid == 0) {
 899                                 /* son */
 900                                 res = system(cmd);
 901                                 res = WEXITSTATUS(res);
 902                                 _exit(res);
 903                         } else {
 904                                 int status = 0;
 905                                 time_t start_wait = time(NULL);
 906                                 res = -1;
 907                                 do {
 908                                         if (waitpid(pid, &status, WNOHANG) == 0 || !WIFEXITED(status)) {
 909                                                 usleep(200000);
 910                                         } else {
 911                                                 res = WEXITSTATUS(status);
 912                                                 break;
 913                                         }
 914                                         if (time(NULL) - start_wait > 5) {
 915                                                 debug_print("SIGTERM'ing gpg\n");
 916                                                 kill(pid, SIGTERM);
 917                                         }
 918                                         if (time(NULL) - start_wait > 6) {
 919                                                 debug_print("SIGKILL'ing gpg\n");
 920                                                 kill(pid, SIGKILL);
 921                                                 break;
 922                                         }
 923                                 } while(1);
 924                         }
 925                         if (res == 0) {
 926                                 alertpanel_notice(_("Key exported."));
 927                         } else {
 928                                 alertpanel_error(_("Couldn't export key."));
 929                         }
 930                         g_free(cmd);
 931 #else
 932                         alertpanel_error(_("Key export isn't implemented in Windows."));
 933 #endif
 934                 }
 935         }
 936         prefs_gpg_get_config()->gpg_ask_create_key = FALSE;
 937         prefs_gpg_save_config();
 938         gpgme_release(ctx);
 939 }
 940
 941 gboolean sgpgme_has_secret_key(void)
 942 {
 943         gpgme_error_t err = 0;
 944         gpgme_ctx_t ctx;
 945         gpgme_key_t key;
 946
 947         err = gpgme_new (&ctx);
 948         if (err) {
 949                 debug_print("err : %s\n", gpgme_strerror(err));
 950                 return TRUE;
 951         }
 952 check_again:
 953         err = gpgme_op_keylist_start(ctx, NULL, TRUE);
 954         if (!err)
 955                 err = gpgme_op_keylist_next(ctx, &key);
 956         gpgme_op_keylist_end(ctx);
 957         if (gpg_err_code(err) == GPG_ERR_EOF) {
 958                 if (gpgme_get_protocol(ctx) != GPGME_PROTOCOL_CMS) {
 959                         gpgme_set_protocol(ctx, GPGME_PROTOCOL_CMS);
 960                         goto check_again;
 961                 }
 962                 gpgme_release(ctx);
 963                 return FALSE;
 964         } else {
 965                 gpgme_release(ctx);
 966                 return TRUE;
 967         }
 968 }
 969
 970 void sgpgme_check_create_key(void)
 971 {
 972         if (prefs_gpg_get_config()->gpg_ask_create_key &&
 973             !sgpgme_has_secret_key()) {
 974                 sgpgme_create_secret_key(NULL, TRUE);
 975         } else {
 976                 prefs_gpg_get_config()->gpg_ask_create_key = FALSE;
 977                 prefs_gpg_save_config();
 978         }
 979 }
 980
 981 void *sgpgme_data_release_and_get_mem(gpgme_data_t data, size_t *len)
 982 {
 983         char buf[BUFSIZ];
 984         void *result = NULL;
 985         ssize_t r = 0;
 986         size_t w = 0;
 987
 988         if (data == NULL)
 989                 return NULL;
 990         if (len == NULL)
 991                 return NULL;
 992
 993         /* I know it's deprecated, but we don't compile with _LARGEFILE */
 994         cm_gpgme_data_rewind(data);
 995         while ((r = gpgme_data_read(data, buf, BUFSIZ)) > 0) {
 996                 void *rresult = realloc(result, r + w);
 997                 if (rresult == NULL) {
 998                         g_warning("can't allocate memory");
 999                         if (result != NULL)
1000                                 free(result);
1001                         return NULL;
1002                 }
1003                 result = rresult;
1004                 memcpy(result+w, buf, r);
1005                 w += r;
1006         }
1007
1008         *len = w;
1009
1010         gpgme_data_release(data);
1011         if (r < 0) {
1012                 free(result);
1013                 *len = 0;
1014                 return NULL;
1015         }
1016         return result;
1017 }
1018
1019 gpgme_error_t cm_gpgme_data_rewind(gpgme_data_t dh)
1020 {
1021 #if defined(_FILE_OFFSET_BITS) && _FILE_OFFSET_BITS == 64
1022         if (gpgme_data_seek(dh, (off_t)0, SEEK_SET) == -1)
1023                 return gpg_error_from_errno(errno);
1024         else
1025                 return 0;
1026 #else
1027         return gpgme_data_rewind(dh);
1028 #endif
1029 }
1030
1031 #endif /* USE_GPGME */