src/plugins/pgpmime/pgpmime.c

   1 /*
   2  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2006 Hiroyuki Yamamoto & the Sylpheed-Claws 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 2 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, write to the Free Software
  17  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  */
  19
  20 #ifdef HAVE_CONFIG_H
  21 #  include "config.h"
  22 #endif
  23
  24 #ifdef USE_GPGME
  25
  26 #include "defs.h"
  27 #include <glib.h>
  28 #include <gpgme.h>
  29 #include <ctype.h>
  30
  31 #include "utils.h"
  32 #include "privacy.h"
  33 #include "procmime.h"
  34
  35 #include "pgpmime.h"
  36 #include <plugins/pgpcore/sgpgme.h>
  37 #include <plugins/pgpcore/prefs_gpg.h>
  38 #include <plugins/pgpcore/passphrase.h>
  39
  40 #include "prefs_common.h"
  41
  42 typedef struct _PrivacyDataPGP PrivacyDataPGP;
  43
  44 struct _PrivacyDataPGP
  45 {
  46         PrivacyData     data;
  47
  48         gboolean        done_sigtest;
  49         gboolean        is_signed;
  50         gpgme_verify_result_t   sigstatus;
  51         gpgme_ctx_t     ctx;
  52 };
  53
  54 static PrivacySystem pgpmime_system;
  55
  56 static gint pgpmime_check_signature(MimeInfo *mimeinfo);
  57
  58 static PrivacyDataPGP *pgpmime_new_privacydata()
  59 {
  60         PrivacyDataPGP *data;
  61
  62         data = g_new0(PrivacyDataPGP, 1);
  63         data->data.system = &pgpmime_system;
  64         data->done_sigtest = FALSE;
  65         data->is_signed = FALSE;
  66         data->sigstatus = NULL;
  67         gpgme_new(&data->ctx);
  68
  69         return data;
  70 }
  71
  72 static void pgpmime_free_privacydata(PrivacyData *_data)
  73 {
  74         PrivacyDataPGP *data = (PrivacyDataPGP *) _data;
  75         gpgme_release(data->ctx);
  76         g_free(data);
  77 }
  78
  79 static gboolean pgpmime_is_signed(MimeInfo *mimeinfo)
  80 {
  81         MimeInfo *parent;
  82         MimeInfo *signature;
  83         const gchar *protocol;
  84         PrivacyDataPGP *data = NULL;
  85
  86         g_return_val_if_fail(mimeinfo != NULL, FALSE);
  87         if (mimeinfo->privacy != NULL) {
  88                 data = (PrivacyDataPGP *) mimeinfo->privacy;
  89                 if (data->done_sigtest)
  90                         return data->is_signed;
  91         }
  92
  93         /* check parent */
  94         parent = procmime_mimeinfo_parent(mimeinfo);
  95         if (parent == NULL)
  96                 return FALSE;
  97         if ((parent->type != MIMETYPE_MULTIPART) ||
  98             g_ascii_strcasecmp(parent->subtype, "signed"))
  99                 return FALSE;
 100         protocol = procmime_mimeinfo_get_parameter(parent, "protocol");
 101         if ((protocol == NULL) ||
 102             (g_ascii_strcasecmp(protocol, "application/pgp-signature")))
 103                 return FALSE;
 104
 105         /* check if mimeinfo is the first child */
 106         if (parent->node->children->data != mimeinfo)
 107                 return FALSE;
 108
 109         /* check signature */
 110         signature = parent->node->children->next != NULL ?
 111             (MimeInfo *) parent->node->children->next->data : NULL;
 112         if (signature == NULL)
 113                 return FALSE;
 114         if ((signature->type != MIMETYPE_APPLICATION) ||
 115             (g_ascii_strcasecmp(signature->subtype, "pgp-signature")))
 116                 return FALSE;
 117
 118         if (data == NULL) {
 119                 data = pgpmime_new_privacydata();
 120                 mimeinfo->privacy = (PrivacyData *) data;
 121         }
 122
 123         data->done_sigtest = TRUE;
 124         data->is_signed = TRUE;
 125
 126         return TRUE;
 127 }
 128
 129 static gchar *get_canonical_content(FILE *fp, const gchar *boundary)
 130 {
 131         gchar *ret;
 132         GString *textbuffer;
 133         guint boundary_len;
 134         gchar buf[BUFFSIZE];
 135
 136         boundary_len = strlen(boundary);
 137         while (fgets(buf, sizeof(buf), fp) != NULL)
 138                 if (IS_BOUNDARY(buf, boundary, boundary_len))
 139                         break;
 140
 141         textbuffer = g_string_new("");
 142         while (fgets(buf, sizeof(buf), fp) != NULL) {
 143                 gchar *buf2;
 144
 145                 if (IS_BOUNDARY(buf, boundary, boundary_len))
 146                         break;
 147
 148                 buf2 = canonicalize_str(buf);
 149                 g_string_append(textbuffer, buf2);
 150                 g_free(buf2);
 151         }
 152         g_string_truncate(textbuffer, textbuffer->len - 2);
 153
 154         ret = textbuffer->str;
 155         g_string_free(textbuffer, FALSE);
 156
 157         return ret;
 158 }
 159
 160 static gint pgpmime_check_signature(MimeInfo *mimeinfo)
 161 {
 162         PrivacyDataPGP *data;
 163         MimeInfo *parent, *signature;
 164         FILE *fp;
 165         gchar *boundary;
 166         gchar *textstr;
 167         gpgme_data_t sigdata = NULL, textdata = NULL;
 168         gpgme_error_t err;
 169         g_return_val_if_fail(mimeinfo != NULL, -1);
 170         g_return_val_if_fail(mimeinfo->privacy != NULL, -1);
 171         data = (PrivacyDataPGP *) mimeinfo->privacy;
 172         gpgme_new(&data->ctx);
 173
 174         debug_print("Checking PGP/MIME signature\n");
 175
 176         err = gpgme_set_protocol(data->ctx, GPGME_PROTOCOL_OpenPGP);
 177
 178         if (err) {
 179                 debug_print ("gpgme_set_protocol failed: %s\n",
 180                    gpgme_strerror (err));
 181         }
 182         parent = procmime_mimeinfo_parent(mimeinfo);
 183
 184         fp = g_fopen(parent->data.filename, "rb");
 185         g_return_val_if_fail(fp != NULL, SIGNATURE_INVALID);
 186
 187         boundary = g_hash_table_lookup(parent->typeparameters, "boundary");
 188         if (!boundary)
 189                 return 0;
 190
 191         textstr = get_canonical_content(fp, boundary);
 192
 193         err = gpgme_data_new_from_mem(&textdata, textstr, strlen(textstr), 0);
 194         if (err) {
 195                 debug_print ("gpgme_data_new_from_mem failed: %s\n",
 196                    gpgme_strerror (err));
 197         }
 198         signature = (MimeInfo *) mimeinfo->node->next->data;
 199         sigdata = sgpgme_data_from_mimeinfo(signature);
 200
 201         err = 0;
 202         if (signature->encoding_type == ENC_BASE64) {
 203                 err = gpgme_data_set_encoding (sigdata, GPGME_DATA_ENCODING_BASE64);
 204         }
 205
 206         if (err) {
 207                 debug_print ("gpgme_data_set_encoding failed: %s\n",
 208                         gpgme_strerror (err));
 209         }
 210
 211         data->sigstatus =
 212                 sgpgme_verify_signature (data->ctx, sigdata, textdata, NULL);
 213
 214         gpgme_data_release(sigdata);
 215         gpgme_data_release(textdata);
 216         g_free(textstr);
 217         fclose(fp);
 218
 219         return 0;
 220 }
 221
 222 static SignatureStatus pgpmime_get_sig_status(MimeInfo *mimeinfo)
 223 {
 224         PrivacyDataPGP *data = (PrivacyDataPGP *) mimeinfo->privacy;
 225
 226         g_return_val_if_fail(data != NULL, SIGNATURE_INVALID);
 227
 228         if (data->sigstatus == NULL &&
 229             prefs_gpg_get_config()->auto_check_signatures)
 230                 pgpmime_check_signature(mimeinfo);
 231
 232         return sgpgme_sigstat_gpgme_to_privacy(data->ctx, data->sigstatus);
 233 }
 234
 235 static gchar *pgpmime_get_sig_info_short(MimeInfo *mimeinfo)
 236 {
 237         PrivacyDataPGP *data = (PrivacyDataPGP *) mimeinfo->privacy;
 238
 239         g_return_val_if_fail(data != NULL, g_strdup("Error"));
 240
 241         if (data->sigstatus == NULL &&
 242             prefs_gpg_get_config()->auto_check_signatures)
 243                 pgpmime_check_signature(mimeinfo);
 244
 245         return sgpgme_sigstat_info_short(data->ctx, data->sigstatus);
 246 }
 247
 248 static gchar *pgpmime_get_sig_info_full(MimeInfo *mimeinfo)
 249 {
 250         PrivacyDataPGP *data = (PrivacyDataPGP *) mimeinfo->privacy;
 251
 252         g_return_val_if_fail(data != NULL, g_strdup("Error"));
 253
 254         if (data->sigstatus == NULL &&
 255             prefs_gpg_get_config()->auto_check_signatures)
 256                 pgpmime_check_signature(mimeinfo);
 257
 258         return sgpgme_sigstat_info_full(data->ctx, data->sigstatus);
 259 }
 260
 261 static gboolean pgpmime_is_encrypted(MimeInfo *mimeinfo)
 262 {
 263         MimeInfo *tmpinfo;
 264         const gchar *tmpstr;
 265
 266         if (mimeinfo->type != MIMETYPE_MULTIPART)
 267                 return FALSE;
 268         if (g_ascii_strcasecmp(mimeinfo->subtype, "encrypted"))
 269                 return FALSE;
 270         tmpstr = procmime_mimeinfo_get_parameter(mimeinfo, "protocol");
 271         if ((tmpstr == NULL) || g_ascii_strcasecmp(tmpstr, "application/pgp-encrypted"))
 272                 return FALSE;
 273         if (g_node_n_children(mimeinfo->node) != 2)
 274                 return FALSE;
 275
 276         tmpinfo = (MimeInfo *) g_node_nth_child(mimeinfo->node, 0)->data;
 277         if (tmpinfo->type != MIMETYPE_APPLICATION)
 278                 return FALSE;
 279         if (g_ascii_strcasecmp(tmpinfo->subtype, "pgp-encrypted"))
 280                 return FALSE;
 281
 282         tmpinfo = (MimeInfo *) g_node_nth_child(mimeinfo->node, 1)->data;
 283         if (tmpinfo->type != MIMETYPE_APPLICATION)
 284                 return FALSE;
 285         if (g_ascii_strcasecmp(tmpinfo->subtype, "octet-stream"))
 286                 return FALSE;
 287
 288         return TRUE;
 289 }
 290
 291 static MimeInfo *pgpmime_decrypt(MimeInfo *mimeinfo)
 292 {
 293         MimeInfo *encinfo, *decinfo, *parseinfo;
 294         gpgme_data_t cipher = NULL, plain = NULL;
 295         static gint id = 0;
 296         FILE *dstfp;
 297         gchar *fname;
 298         gpgme_verify_result_t sigstat = NULL;
 299         PrivacyDataPGP *data = NULL;
 300         gpgme_ctx_t ctx;
 301         gchar *chars;
 302         size_t len;
 303
 304         if (gpgme_new(&ctx) != GPG_ERR_NO_ERROR)
 305                 return NULL;
 306
 307
 308         g_return_val_if_fail(pgpmime_is_encrypted(mimeinfo), NULL);
 309
 310         encinfo = (MimeInfo *) g_node_nth_child(mimeinfo->node, 1)->data;
 311
 312         cipher = sgpgme_data_from_mimeinfo(encinfo);
 313         plain = sgpgme_decrypt_verify(cipher, &sigstat, ctx);
 314
 315         gpgme_data_release(cipher);
 316         if (plain == NULL) {
 317                 debug_print("plain is null!\n");
 318                 gpgme_release(ctx);
 319                 return NULL;
 320         }
 321
 322         fname = g_strdup_printf("%s%cplaintext.%08x",
 323                 get_mime_tmp_dir(), G_DIR_SEPARATOR, ++id);
 324
 325         if ((dstfp = g_fopen(fname, "wb")) == NULL) {
 326                 FILE_OP_ERROR(fname, "fopen");
 327                 g_free(fname);
 328                 gpgme_data_release(plain);
 329                 gpgme_release(ctx);
 330                 debug_print("can't open!\n");
 331                 return NULL;
 332         }
 333
 334         fprintf(dstfp, "MIME-Version: 1.0\n");
 335
 336         chars = gpgme_data_release_and_get_mem(plain, &len);
 337         if (len > 0)
 338                 fwrite(chars, len, 1, dstfp);
 339         fclose(dstfp);
 340
 341         parseinfo = procmime_scan_file(fname);
 342         g_free(fname);
 343         if (parseinfo == NULL) {
 344                 gpgme_release(ctx);
 345                 return NULL;
 346         }
 347         decinfo = g_node_first_child(parseinfo->node) != NULL ?
 348                 g_node_first_child(parseinfo->node)->data : NULL;
 349         if (decinfo == NULL) {
 350                 gpgme_release(ctx);
 351                 return NULL;
 352         }
 353
 354         g_node_unlink(decinfo->node);
 355         procmime_mimeinfo_free_all(parseinfo);
 356
 357         decinfo->tmp = TRUE;
 358
 359         if (sigstat != NULL && sigstat->signatures != NULL) {
 360                 if (decinfo->privacy != NULL) {
 361                         data = (PrivacyDataPGP *) decinfo->privacy;
 362                 } else {
 363                         data = pgpmime_new_privacydata();
 364                         decinfo->privacy = (PrivacyData *) data;
 365                 }
 366                 data->done_sigtest = TRUE;
 367                 data->is_signed = TRUE;
 368                 data->sigstatus = sigstat;
 369                 if (data->ctx)
 370                         gpgme_release(data->ctx);
 371                 data->ctx = ctx;
 372         } else
 373                 gpgme_release(ctx);
 374
 375         return decinfo;
 376 }
 377
 378 gboolean pgpmime_sign(MimeInfo *mimeinfo, PrefsAccount *account)
 379 {
 380         MimeInfo *msgcontent, *sigmultipart, *newinfo;
 381         gchar *textstr, *micalg;
 382         FILE *fp;
 383         gchar *boundary = NULL;
 384         gchar *sigcontent;
 385         gpgme_ctx_t ctx;
 386         gpgme_data_t gpgtext, gpgsig;
 387         gpgme_error_t err;
 388         size_t len;
 389         struct passphrase_cb_info_s info;
 390         gpgme_sign_result_t result = NULL;
 391         gchar *test_msg;
 392
 393         fp = my_tmpfile();
 394         if (fp == NULL) {
 395                 perror("my_tmpfile");
 396                 return FALSE;
 397         }
 398         procmime_write_mimeinfo(mimeinfo, fp);
 399         rewind(fp);
 400
 401         /* read temporary file into memory */
 402         test_msg = file_read_stream_to_str(fp);
 403         fclose(fp);
 404
 405         memset (&info, 0, sizeof info);
 406
 407         /* remove content node from message */
 408         msgcontent = (MimeInfo *) mimeinfo->node->children->data;
 409         g_node_unlink(msgcontent->node);
 410
 411         /* create temporary multipart for content */
 412         sigmultipart = procmime_mimeinfo_new();
 413         sigmultipart->type = MIMETYPE_MULTIPART;
 414         sigmultipart->subtype = g_strdup("signed");
 415
 416         do {
 417                 g_free(boundary);
 418                 boundary = generate_mime_boundary("Sig");
 419         } while (strstr(test_msg, boundary) != NULL);
 420
 421         g_free(test_msg);
 422
 423         g_hash_table_insert(sigmultipart->typeparameters, g_strdup("boundary"),
 424                             g_strdup(boundary));
 425         g_hash_table_insert(sigmultipart->typeparameters, g_strdup("protocol"),
 426                             g_strdup("application/pgp-signature"));
 427         g_node_append(sigmultipart->node, msgcontent->node);
 428         g_node_append(mimeinfo->node, sigmultipart->node);
 429
 430         /* write message content to temporary file */
 431         fp = my_tmpfile();
 432         if (fp == NULL) {
 433                 perror("my_tmpfile");
 434                 return FALSE;
 435         }
 436         procmime_write_mimeinfo(sigmultipart, fp);
 437         rewind(fp);
 438
 439         /* read temporary file into memory */
 440         textstr = get_canonical_content(fp, boundary);
 441
 442         fclose(fp);
 443
 444         gpgme_data_new_from_mem(&gpgtext, textstr, strlen(textstr), 0);
 445         gpgme_data_new(&gpgsig);
 446         gpgme_new(&ctx);
 447         gpgme_set_textmode(ctx, 1);
 448         gpgme_set_armor(ctx, 1);
 449         gpgme_signers_clear (ctx);
 450
 451         if (!sgpgme_setup_signers(ctx, account)) {
 452                 gpgme_release(ctx);
 453                 return FALSE;
 454         }
 455
 456         if (getenv("GPG_AGENT_INFO")) {
 457                 debug_print("GPG_AGENT_INFO environment defined, running without passphrase callback\n");
 458         } else {
 459                 info.c = ctx;
 460                 gpgme_set_passphrase_cb (ctx, gpgmegtk_passphrase_cb, &info);
 461         }
 462
 463         err = gpgme_op_sign(ctx, gpgtext, gpgsig, GPGME_SIG_MODE_DETACH);
 464         if (err != GPG_ERR_NO_ERROR) {
 465                 debug_print("gpgme_op_sign error : %x\n", err);
 466                 gpgme_release(ctx);
 467                 return FALSE;
 468         }
 469         result = gpgme_op_sign_result(ctx);
 470         if (result && result->signatures) {
 471             if (gpgme_get_protocol(ctx) == GPGME_PROTOCOL_OpenPGP) {
 472                 micalg = g_strdup_printf("PGP-%s", gpgme_hash_algo_name(
 473                             result->signatures->hash_algo));
 474             } else {
 475                 micalg = g_strdup(gpgme_hash_algo_name(
 476                             result->signatures->hash_algo));
 477             }
 478         } else {
 479             /* can't get result (maybe no signing key?) */
 480             debug_print("gpgme_op_sign_result error\n");
 481             return FALSE;
 482         }
 483
 484         gpgme_release(ctx);
 485         sigcontent = gpgme_data_release_and_get_mem(gpgsig, &len);
 486         gpgme_data_release(gpgtext);
 487         g_free(textstr);
 488
 489         /* add signature */
 490         g_hash_table_insert(sigmultipart->typeparameters, g_strdup("micalg"),
 491                             micalg);
 492
 493         newinfo = procmime_mimeinfo_new();
 494         newinfo->type = MIMETYPE_APPLICATION;
 495         newinfo->subtype = g_strdup("pgp-signature");
 496         g_hash_table_insert(newinfo->typeparameters, g_strdup("name"),
 497                              g_strdup("signature.asc"));
 498         newinfo->content = MIMECONTENT_MEM;
 499         newinfo->disposition = DISPOSITIONTYPE_ATTACHMENT;
 500         g_hash_table_insert(newinfo->dispositionparameters, g_strdup("filename"),
 501                             g_strdup("signature.asc"));
 502         newinfo->data.mem = g_malloc(len + 1);
 503         g_memmove(newinfo->data.mem, sigcontent, len);
 504         newinfo->data.mem[len] = '\0';
 505         g_node_append(sigmultipart->node, newinfo->node);
 506
 507         g_free(sigcontent);
 508
 509         return TRUE;
 510 }
 511 gchar *pgpmime_get_encrypt_data(GSList *recp_names)
 512 {
 513         return sgpgme_get_encrypt_data(recp_names, GPGME_PROTOCOL_OpenPGP);
 514 }
 515
 516 gboolean pgpmime_encrypt(MimeInfo *mimeinfo, const gchar *encrypt_data)
 517 {
 518         MimeInfo *msgcontent, *encmultipart, *newinfo;
 519         FILE *fp;
 520         gchar *boundary, *enccontent;
 521         size_t len;
 522         gchar *textstr;
 523         gpgme_data_t gpgtext = NULL, gpgenc = NULL;
 524         gpgme_ctx_t ctx = NULL;
 525         gpgme_key_t *kset = NULL;
 526         gchar **fprs = g_strsplit(encrypt_data, " ", -1);
 527         gint i = 0;
 528         while (fprs[i] && strlen(fprs[i])) {
 529                 i++;
 530         }
 531
 532         kset = g_malloc(sizeof(gpgme_key_t)*(i+1));
 533         memset(kset, 0, sizeof(gpgme_key_t)*(i+1));
 534         gpgme_new(&ctx);
 535         i = 0;
 536         while (fprs[i] && strlen(fprs[i])) {
 537                 gpgme_key_t key;
 538                 gpgme_error_t err;
 539                 err = gpgme_get_key(ctx, fprs[i], &key, 0);
 540                 if (err) {
 541                         debug_print("can't add key '%s'[%d] (%s)\n", fprs[i],i, gpgme_strerror(err));
 542                         break;
 543                 }
 544                 debug_print("found %s at %d\n", fprs[i], i);
 545                 kset[i] = key;
 546                 i++;
 547         }
 548
 549         debug_print("Encrypting message content\n");
 550
 551         /* remove content node from message */
 552         msgcontent = (MimeInfo *) mimeinfo->node->children->data;
 553         g_node_unlink(msgcontent->node);
 554
 555         /* create temporary multipart for content */
 556         encmultipart = procmime_mimeinfo_new();
 557         encmultipart->type = MIMETYPE_MULTIPART;
 558         encmultipart->subtype = g_strdup("encrypted");
 559         boundary = generate_mime_boundary("Encrypt");
 560         g_hash_table_insert(encmultipart->typeparameters, g_strdup("boundary"),
 561                             g_strdup(boundary));
 562         g_hash_table_insert(encmultipart->typeparameters, g_strdup("protocol"),
 563                             g_strdup("application/pgp-encrypted"));
 564         g_node_append(encmultipart->node, msgcontent->node);
 565
 566         /* write message content to temporary file */
 567         fp = my_tmpfile();
 568         if (fp == NULL) {
 569                 perror("my_tmpfile");
 570                 return FALSE;
 571         }
 572         procmime_write_mimeinfo(encmultipart, fp);
 573         rewind(fp);
 574
 575         /* read temporary file into memory */
 576         textstr = get_canonical_content(fp, boundary);
 577
 578         fclose(fp);
 579
 580         /* encrypt data */
 581         gpgme_data_new_from_mem(&gpgtext, textstr, strlen(textstr), 0);
 582         gpgme_data_new(&gpgenc);
 583         gpgme_set_armor(ctx, 1);
 584         gpgme_data_rewind(gpgtext);
 585
 586         gpgme_op_encrypt(ctx, kset, GPGME_ENCRYPT_ALWAYS_TRUST, gpgtext, gpgenc);
 587
 588         gpgme_release(ctx);
 589         enccontent = gpgme_data_release_and_get_mem(gpgenc, &len);
 590         gpgme_data_release(gpgtext);
 591         g_free(textstr);
 592
 593         /* create encrypted multipart */
 594         g_node_unlink(msgcontent->node);
 595         procmime_mimeinfo_free_all(msgcontent);
 596         g_node_append(mimeinfo->node, encmultipart->node);
 597
 598         newinfo = procmime_mimeinfo_new();
 599         newinfo->type = MIMETYPE_APPLICATION;
 600         newinfo->subtype = g_strdup("pgp-encrypted");
 601         newinfo->content = MIMECONTENT_MEM;
 602         newinfo->data.mem = g_strdup("Version: 1\n");
 603         g_node_append(encmultipart->node, newinfo->node);
 604
 605         newinfo = procmime_mimeinfo_new();
 606         newinfo->type = MIMETYPE_APPLICATION;
 607         newinfo->subtype = g_strdup("octet-stream");
 608         newinfo->content = MIMECONTENT_MEM;
 609         newinfo->data.mem = g_malloc(len + 1);
 610         g_memmove(newinfo->data.mem, enccontent, len);
 611         newinfo->data.mem[len] = '\0';
 612         g_node_append(encmultipart->node, newinfo->node);
 613
 614         g_free(enccontent);
 615
 616         return TRUE;
 617 }
 618
 619 static PrivacySystem pgpmime_system = {
 620         "pgpmime",                      /* id */
 621         "PGP MIME",                     /* name */
 622
 623         pgpmime_free_privacydata,       /* free_privacydata */
 624
 625         pgpmime_is_signed,              /* is_signed(MimeInfo *) */
 626         pgpmime_check_signature,        /* check_signature(MimeInfo *) */
 627         pgpmime_get_sig_status,         /* get_sig_status(MimeInfo *) */
 628         pgpmime_get_sig_info_short,     /* get_sig_info_short(MimeInfo *) */
 629         pgpmime_get_sig_info_full,      /* get_sig_info_full(MimeInfo *) */
 630
 631         pgpmime_is_encrypted,           /* is_encrypted(MimeInfo *) */
 632         pgpmime_decrypt,                /* decrypt(MimeInfo *) */
 633
 634         TRUE,
 635         pgpmime_sign,
 636
 637         TRUE,
 638         pgpmime_get_encrypt_data,
 639         pgpmime_encrypt,
 640 };
 641
 642 void pgpmime_init()
 643 {
 644         privacy_register_system(&pgpmime_system);
 645 }
 646
 647 void pgpmime_done()
 648 {
 649         privacy_unregister_system(&pgpmime_system);
 650 }
 651
 652 #endif /* USE_GPGME */