src/plugins/pgpmime/pgpmime.c

   1 /*
   2  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2003 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         gboolean        is_pkcs7;
  53 };
  54
  55 static PrivacySystem pgpmime_system;
  56
  57 static gint pgpmime_check_signature(MimeInfo *mimeinfo);
  58
  59 static PrivacyDataPGP *pgpmime_new_privacydata()
  60 {
  61         PrivacyDataPGP *data;
  62
  63         data = g_new0(PrivacyDataPGP, 1);
  64         data->data.system = &pgpmime_system;
  65         data->done_sigtest = FALSE;
  66         data->is_signed = FALSE;
  67         data->sigstatus = NULL;
  68         gpgme_new(&data->ctx);
  69
  70         return data;
  71 }
  72
  73 static void pgpmime_free_privacydata(PrivacyData *_data)
  74 {
  75         PrivacyDataPGP *data = (PrivacyDataPGP *) _data;
  76         gpgme_release(data->ctx);
  77         g_free(data);
  78 }
  79
  80 static gboolean pgpmime_is_signed(MimeInfo *mimeinfo)
  81 {
  82         MimeInfo *parent;
  83         MimeInfo *signature;
  84         const gchar *protocol;
  85         PrivacyDataPGP *data = NULL;
  86
  87         g_return_val_if_fail(mimeinfo != NULL, FALSE);
  88         if (mimeinfo->privacy != NULL) {
  89                 data = (PrivacyDataPGP *) mimeinfo->privacy;
  90                 if (data->done_sigtest)
  91                         return data->is_signed;
  92         }
  93
  94         /* check parent */
  95         parent = procmime_mimeinfo_parent(mimeinfo);
  96         if (parent == NULL)
  97                 return FALSE;
  98         if ((parent->type != MIMETYPE_MULTIPART) ||
  99             g_ascii_strcasecmp(parent->subtype, "signed"))
 100                 return FALSE;
 101         protocol = procmime_mimeinfo_get_parameter(parent, "protocol");
 102         if ((protocol == NULL) ||
 103             (g_ascii_strcasecmp(protocol, "application/pgp-signature") &&
 104              g_ascii_strcasecmp(protocol, "application/pkcs7-signature") &&
 105              g_ascii_strcasecmp(protocol, "application/x-pkcs7-signature")))
 106                 return FALSE;
 107
 108         /* check if mimeinfo is the first child */
 109         if (parent->node->children->data != mimeinfo)
 110                 return FALSE;
 111
 112         /* check signature */
 113         signature = parent->node->children->next != NULL ?
 114             (MimeInfo *) parent->node->children->next->data : NULL;
 115         if (signature == NULL)
 116                 return FALSE;
 117         if ((signature->type != MIMETYPE_APPLICATION) ||
 118             (g_ascii_strcasecmp(signature->subtype, "pgp-signature") &&
 119              g_ascii_strcasecmp(signature->subtype, "pkcs7-signature") &&
 120              g_ascii_strcasecmp(signature->subtype, "x-pkcs7-signature")))
 121                 return FALSE;
 122
 123         if (data == NULL) {
 124                 data = pgpmime_new_privacydata();
 125                 mimeinfo->privacy = (PrivacyData *) data;
 126         }
 127
 128         if (!g_ascii_strcasecmp(signature->subtype, "pkcs7-signature") ||
 129             !g_ascii_strcasecmp(signature->subtype, "x-pkcs7-signature"))
 130                 data->is_pkcs7 = TRUE;
 131         else
 132                 data->is_pkcs7 = FALSE;
 133
 134         data->done_sigtest = TRUE;
 135         data->is_signed = TRUE;
 136
 137         return TRUE;
 138 }
 139
 140 static gchar *get_canonical_content(FILE *fp, const gchar *boundary)
 141 {
 142         gchar *ret;
 143         GString *textbuffer;
 144         guint boundary_len;
 145         gchar buf[BUFFSIZE];
 146
 147         boundary_len = strlen(boundary);
 148         while (fgets(buf, sizeof(buf), fp) != NULL)
 149                 if (IS_BOUNDARY(buf, boundary, boundary_len))
 150                         break;
 151
 152         textbuffer = g_string_new("");
 153         while (fgets(buf, sizeof(buf), fp) != NULL) {
 154                 gchar *buf2;
 155
 156                 if (IS_BOUNDARY(buf, boundary, boundary_len))
 157                         break;
 158
 159                 buf2 = canonicalize_str(buf);
 160                 g_string_append(textbuffer, buf2);
 161                 g_free(buf2);
 162         }
 163         g_string_truncate(textbuffer, textbuffer->len - 2);
 164
 165         ret = textbuffer->str;
 166         g_string_free(textbuffer, FALSE);
 167
 168         return ret;
 169 }
 170
 171 static gint pgpmime_check_signature(MimeInfo *mimeinfo)
 172 {
 173         PrivacyDataPGP *data;
 174         MimeInfo *parent, *signature;
 175         FILE *fp;
 176         gchar *boundary;
 177         gchar *textstr;
 178         gpgme_data_t sigdata = NULL, textdata = NULL;
 179         gpgme_error_t err;
 180         g_return_val_if_fail(mimeinfo != NULL, -1);
 181         g_return_val_if_fail(mimeinfo->privacy != NULL, -1);
 182         data = (PrivacyDataPGP *) mimeinfo->privacy;
 183         gpgme_new(&data->ctx);
 184
 185         debug_print("Checking %s/MIME signature\n", data->is_pkcs7?"S":"PGP");
 186
 187         if (data->is_pkcs7) {
 188                 err = gpgme_set_protocol(data->ctx, GPGME_PROTOCOL_CMS);
 189         } else
 190                 err = gpgme_set_protocol(data->ctx, GPGME_PROTOCOL_OpenPGP);
 191
 192         if (err) {
 193                 debug_print ("gpgme_set_protocol failed: %s\n",
 194                    gpgme_strerror (err));
 195         }
 196         parent = procmime_mimeinfo_parent(mimeinfo);
 197
 198         fp = g_fopen(parent->data.filename, "rb");
 199         g_return_val_if_fail(fp != NULL, SIGNATURE_INVALID);
 200
 201         boundary = g_hash_table_lookup(parent->typeparameters, "boundary");
 202         if (!boundary)
 203                 return 0;
 204
 205         textstr = get_canonical_content(fp, boundary);
 206
 207         err = gpgme_data_new_from_mem(&textdata, textstr, strlen(textstr), 0);
 208         if (err) {
 209                 debug_print ("gpgme_data_new_from_mem failed: %s\n",
 210                    gpgme_strerror (err));
 211         }
 212         signature = (MimeInfo *) mimeinfo->node->next->data;
 213         sigdata = sgpgme_data_from_mimeinfo(signature);
 214
 215         err = 0;
 216         if (signature->encoding_type == ENC_BASE64) {
 217                 err = gpgme_data_set_encoding (sigdata, GPGME_DATA_ENCODING_BASE64);
 218         }
 219
 220         if (err) {
 221                 debug_print ("gpgme_data_set_encoding failed: %s\n",
 222                         gpgme_strerror (err));
 223         }
 224
 225         data->sigstatus =
 226                 sgpgme_verify_signature (data->ctx, sigdata, textdata, NULL);
 227
 228         gpgme_data_release(sigdata);
 229         gpgme_data_release(textdata);
 230         g_free(textstr);
 231         fclose(fp);
 232
 233         return 0;
 234 }
 235
 236 static SignatureStatus pgpmime_get_sig_status(MimeInfo *mimeinfo)
 237 {
 238         PrivacyDataPGP *data = (PrivacyDataPGP *) mimeinfo->privacy;
 239
 240         g_return_val_if_fail(data != NULL, SIGNATURE_INVALID);
 241
 242         if (data->sigstatus == NULL &&
 243             prefs_gpg_get_config()->auto_check_signatures)
 244                 pgpmime_check_signature(mimeinfo);
 245
 246         return sgpgme_sigstat_gpgme_to_privacy(data->ctx, data->sigstatus);
 247 }
 248
 249 static gchar *pgpmime_get_sig_info_short(MimeInfo *mimeinfo)
 250 {
 251         PrivacyDataPGP *data = (PrivacyDataPGP *) mimeinfo->privacy;
 252
 253         g_return_val_if_fail(data != NULL, g_strdup("Error"));
 254
 255         if (data->sigstatus == NULL &&
 256             prefs_gpg_get_config()->auto_check_signatures)
 257                 pgpmime_check_signature(mimeinfo);
 258
 259         return sgpgme_sigstat_info_short(data->ctx, data->sigstatus);
 260 }
 261
 262 static gchar *pgpmime_get_sig_info_full(MimeInfo *mimeinfo)
 263 {
 264         PrivacyDataPGP *data = (PrivacyDataPGP *) mimeinfo->privacy;
 265
 266         g_return_val_if_fail(data != NULL, g_strdup("Error"));
 267
 268         if (data->sigstatus == NULL &&
 269             prefs_gpg_get_config()->auto_check_signatures)
 270                 pgpmime_check_signature(mimeinfo);
 271
 272         return sgpgme_sigstat_info_full(data->ctx, data->sigstatus);
 273 }
 274
 275 static gboolean pgpmime_is_encrypted(MimeInfo *mimeinfo)
 276 {
 277         MimeInfo *tmpinfo;
 278         const gchar *tmpstr;
 279
 280         if (mimeinfo->type != MIMETYPE_MULTIPART)
 281                 return FALSE;
 282         if (g_ascii_strcasecmp(mimeinfo->subtype, "encrypted"))
 283                 return FALSE;
 284         tmpstr = procmime_mimeinfo_get_parameter(mimeinfo, "protocol");
 285         if ((tmpstr == NULL) || g_ascii_strcasecmp(tmpstr, "application/pgp-encrypted"))
 286                 return FALSE;
 287         if (g_node_n_children(mimeinfo->node) != 2)
 288                 return FALSE;
 289
 290         tmpinfo = (MimeInfo *) g_node_nth_child(mimeinfo->node, 0)->data;
 291         if (tmpinfo->type != MIMETYPE_APPLICATION)
 292                 return FALSE;
 293         if (g_ascii_strcasecmp(tmpinfo->subtype, "pgp-encrypted"))
 294                 return FALSE;
 295
 296         tmpinfo = (MimeInfo *) g_node_nth_child(mimeinfo->node, 1)->data;
 297         if (tmpinfo->type != MIMETYPE_APPLICATION)
 298                 return FALSE;
 299         if (g_ascii_strcasecmp(tmpinfo->subtype, "octet-stream"))
 300                 return FALSE;
 301
 302         return TRUE;
 303 }
 304
 305 static MimeInfo *pgpmime_decrypt(MimeInfo *mimeinfo)
 306 {
 307         MimeInfo *encinfo, *decinfo, *parseinfo;
 308         gpgme_data_t cipher = NULL, plain = NULL;
 309         static gint id = 0;
 310         FILE *dstfp;
 311         gchar *fname;
 312         gpgme_verify_result_t sigstat = NULL;
 313         PrivacyDataPGP *data = NULL;
 314         gpgme_ctx_t ctx;
 315         gchar *chars;
 316         size_t len;
 317
 318         if (gpgme_new(&ctx) != GPG_ERR_NO_ERROR)
 319                 return NULL;
 320
 321
 322         g_return_val_if_fail(pgpmime_is_encrypted(mimeinfo), NULL);
 323
 324         encinfo = (MimeInfo *) g_node_nth_child(mimeinfo->node, 1)->data;
 325
 326         cipher = sgpgme_data_from_mimeinfo(encinfo);
 327         plain = sgpgme_decrypt_verify(cipher, &sigstat, ctx);
 328
 329         gpgme_data_release(cipher);
 330         if (plain == NULL) {
 331                 debug_print("plain is null!\n");
 332                 gpgme_release(ctx);
 333                 return NULL;
 334         }
 335
 336         fname = g_strdup_printf("%s%cplaintext.%08x",
 337                 get_mime_tmp_dir(), G_DIR_SEPARATOR, ++id);
 338
 339         if ((dstfp = g_fopen(fname, "wb")) == NULL) {
 340                 FILE_OP_ERROR(fname, "fopen");
 341                 g_free(fname);
 342                 gpgme_data_release(plain);
 343                 gpgme_release(ctx);
 344                 debug_print("can't open!\n");
 345                 return NULL;
 346         }
 347
 348         fprintf(dstfp, "MIME-Version: 1.0\n");
 349
 350         chars = gpgme_data_release_and_get_mem(plain, &len);
 351         if (len > 0)
 352                 fwrite(chars, len, 1, dstfp);
 353         fclose(dstfp);
 354
 355         parseinfo = procmime_scan_file(fname);
 356         g_free(fname);
 357         if (parseinfo == NULL) {
 358                 gpgme_release(ctx);
 359                 return NULL;
 360         }
 361         decinfo = g_node_first_child(parseinfo->node) != NULL ?
 362                 g_node_first_child(parseinfo->node)->data : NULL;
 363         if (decinfo == NULL) {
 364                 gpgme_release(ctx);
 365                 return NULL;
 366         }
 367
 368         g_node_unlink(decinfo->node);
 369         procmime_mimeinfo_free_all(parseinfo);
 370
 371         decinfo->tmp = TRUE;
 372
 373         if (sigstat != NULL && sigstat->signatures != NULL) {
 374                 if (decinfo->privacy != NULL) {
 375                         data = (PrivacyDataPGP *) decinfo->privacy;
 376                 } else {
 377                         data = pgpmime_new_privacydata();
 378                         decinfo->privacy = (PrivacyData *) data;
 379                 }
 380                 data->done_sigtest = TRUE;
 381                 data->is_signed = TRUE;
 382                 data->sigstatus = sigstat;
 383                 if (data->ctx)
 384                         gpgme_release(data->ctx);
 385                 data->ctx = ctx;
 386         } else
 387                 gpgme_release(ctx);
 388
 389         return decinfo;
 390 }
 391
 392 gboolean pgpmime_sign(MimeInfo *mimeinfo, PrefsAccount *account)
 393 {
 394         MimeInfo *msgcontent, *sigmultipart, *newinfo;
 395         gchar *textstr, *micalg;
 396         FILE *fp;
 397         gchar *boundary = NULL;
 398         gchar *sigcontent;
 399         gpgme_ctx_t ctx;
 400         gpgme_data_t gpgtext, gpgsig;
 401         size_t len;
 402         struct passphrase_cb_info_s info;
 403         gpgme_sign_result_t result = NULL;
 404         gchar *test_msg;
 405
 406         fp = my_tmpfile();
 407         if (fp == NULL) {
 408                 perror("my_tmpfile");
 409                 return FALSE;
 410         }
 411         procmime_write_mimeinfo(mimeinfo, fp);
 412         rewind(fp);
 413
 414         /* read temporary file into memory */
 415         test_msg = file_read_stream_to_str(fp);
 416         fclose(fp);
 417
 418         memset (&info, 0, sizeof info);
 419
 420         /* remove content node from message */
 421         msgcontent = (MimeInfo *) mimeinfo->node->children->data;
 422         g_node_unlink(msgcontent->node);
 423
 424         /* create temporary multipart for content */
 425         sigmultipart = procmime_mimeinfo_new();
 426         sigmultipart->type = MIMETYPE_MULTIPART;
 427         sigmultipart->subtype = g_strdup("signed");
 428
 429         do {
 430                 if (boundary)
 431                         g_free(boundary);
 432                 boundary = generate_mime_boundary("Sig");
 433         } while (strstr(test_msg, boundary) != NULL);
 434
 435         g_free(test_msg);
 436
 437         g_hash_table_insert(sigmultipart->typeparameters, g_strdup("boundary"),
 438                             g_strdup(boundary));
 439         g_hash_table_insert(sigmultipart->typeparameters, g_strdup("protocol"),
 440                             g_strdup("application/pgp-signature"));
 441         g_node_append(sigmultipart->node, msgcontent->node);
 442         g_node_append(mimeinfo->node, sigmultipart->node);
 443
 444         /* write message content to temporary file */
 445         fp = my_tmpfile();
 446         if (fp == NULL) {
 447                 perror("my_tmpfile");
 448                 return FALSE;
 449         }
 450         procmime_write_mimeinfo(sigmultipart, fp);
 451         rewind(fp);
 452
 453         /* read temporary file into memory */
 454         textstr = get_canonical_content(fp, boundary);
 455
 456         fclose(fp);
 457
 458         gpgme_data_new_from_mem(&gpgtext, textstr, strlen(textstr), 0);
 459         gpgme_data_new(&gpgsig);
 460         gpgme_new(&ctx);
 461         gpgme_set_textmode(ctx, 1);
 462         gpgme_set_armor(ctx, 1);
 463         gpgme_signers_clear (ctx);
 464
 465         if (!sgpgme_setup_signers(ctx, account)) {
 466                 gpgme_release(ctx);
 467                 return FALSE;
 468         }
 469
 470         if (!getenv("GPG_AGENT_INFO")) {
 471                 info.c = ctx;
 472                 gpgme_set_passphrase_cb (ctx, gpgmegtk_passphrase_cb, &info);
 473         }
 474
 475         if (gpgme_op_sign(ctx, gpgtext, gpgsig, GPGME_SIG_MODE_DETACH) != GPG_ERR_NO_ERROR) {
 476                 gpgme_release(ctx);
 477                 return FALSE;
 478         }
 479         result = gpgme_op_sign_result(ctx);
 480         if (result && result->signatures) {
 481             if (gpgme_get_protocol(ctx) == GPGME_PROTOCOL_OpenPGP) {
 482                 micalg = g_strdup_printf("PGP-%s", gpgme_hash_algo_name(
 483                             result->signatures->hash_algo));
 484             } else {
 485                 micalg = g_strdup(gpgme_hash_algo_name(
 486                             result->signatures->hash_algo));
 487             }
 488         } else {
 489             /* can't get result (maybe no signing key?) */
 490             return FALSE;
 491         }
 492
 493         gpgme_release(ctx);
 494         sigcontent = gpgme_data_release_and_get_mem(gpgsig, &len);
 495         gpgme_data_release(gpgtext);
 496         g_free(textstr);
 497
 498         /* add signature */
 499         g_hash_table_insert(sigmultipart->typeparameters, g_strdup("micalg"),
 500                             micalg);
 501
 502         newinfo = procmime_mimeinfo_new();
 503         newinfo->type = MIMETYPE_APPLICATION;
 504         newinfo->subtype = g_strdup("pgp-signature");
 505         newinfo->content = MIMECONTENT_MEM;
 506         newinfo->data.mem = g_malloc(len + 1);
 507         g_memmove(newinfo->data.mem, sigcontent, len);
 508         newinfo->data.mem[len] = '\0';
 509         g_node_append(sigmultipart->node, newinfo->node);
 510
 511         g_free(sigcontent);
 512
 513         return TRUE;
 514 }
 515 gchar *pgpmime_get_encrypt_data(GSList *recp_names)
 516 {
 517         return sgpgme_get_encrypt_data(recp_names);
 518 }
 519
 520 gboolean pgpmime_encrypt(MimeInfo *mimeinfo, const gchar *encrypt_data)
 521 {
 522         MimeInfo *msgcontent, *encmultipart, *newinfo;
 523         FILE *fp;
 524         gchar *boundary, *enccontent;
 525         size_t len;
 526         gchar *textstr;
 527         gpgme_data_t gpgtext = NULL, gpgenc = NULL;
 528         gpgme_ctx_t ctx = NULL;
 529         gpgme_key_t *kset = NULL;
 530         gchar **fprs = g_strsplit(encrypt_data, " ", -1);
 531         gint i = 0;
 532         while (fprs[i] && strlen(fprs[i])) {
 533                 i++;
 534         }
 535
 536         kset = g_malloc(sizeof(gpgme_key_t)*(i+1));
 537         memset(kset, 0, sizeof(gpgme_key_t)*(i+1));
 538         gpgme_new(&ctx);
 539         i = 0;
 540         while (fprs[i] && strlen(fprs[i])) {
 541                 gpgme_key_t key;
 542                 gpgme_error_t err;
 543                 err = gpgme_get_key(ctx, fprs[i], &key, 0);
 544                 if (err) {
 545                         debug_print("can't add key '%s'[%d] (%s)\n", fprs[i],i, gpgme_strerror(err));
 546                         break;
 547                 }
 548                 debug_print("found %s at %d\n", fprs[i], i);
 549                 kset[i] = key;
 550                 i++;
 551         }
 552
 553         debug_print("Encrypting message content\n");
 554
 555         /* remove content node from message */
 556         msgcontent = (MimeInfo *) mimeinfo->node->children->data;
 557         g_node_unlink(msgcontent->node);
 558
 559         /* create temporary multipart for content */
 560         encmultipart = procmime_mimeinfo_new();
 561         encmultipart->type = MIMETYPE_MULTIPART;
 562         encmultipart->subtype = g_strdup("encrypted");
 563         boundary = generate_mime_boundary("Encrypt");
 564         g_hash_table_insert(encmultipart->typeparameters, g_strdup("boundary"),
 565                             g_strdup(boundary));
 566         g_hash_table_insert(encmultipart->typeparameters, g_strdup("protocol"),
 567                             g_strdup("application/pgp-encrypted"));
 568         g_node_append(encmultipart->node, msgcontent->node);
 569
 570         /* write message content to temporary file */
 571         fp = my_tmpfile();
 572         if (fp == NULL) {
 573                 perror("my_tmpfile");
 574                 return FALSE;
 575         }
 576         procmime_write_mimeinfo(encmultipart, fp);
 577         rewind(fp);
 578
 579         /* read temporary file into memory */
 580         textstr = get_canonical_content(fp, boundary);
 581
 582         fclose(fp);
 583
 584         /* encrypt data */
 585         gpgme_data_new_from_mem(&gpgtext, textstr, strlen(textstr), 0);
 586         gpgme_data_new(&gpgenc);
 587         gpgme_set_armor(ctx, 1);
 588         gpgme_data_rewind(gpgtext);
 589
 590         gpgme_op_encrypt(ctx, kset, GPGME_ENCRYPT_ALWAYS_TRUST, gpgtext, gpgenc);
 591
 592         gpgme_release(ctx);
 593         enccontent = gpgme_data_release_and_get_mem(gpgenc, &len);
 594         gpgme_data_release(gpgtext);
 595         g_free(textstr);
 596
 597         /* create encrypted multipart */
 598         g_node_unlink(msgcontent->node);
 599         procmime_mimeinfo_free_all(msgcontent);
 600         g_node_append(mimeinfo->node, encmultipart->node);
 601
 602         newinfo = procmime_mimeinfo_new();
 603         newinfo->type = MIMETYPE_APPLICATION;
 604         newinfo->subtype = g_strdup("pgp-encrypted");
 605         newinfo->content = MIMECONTENT_MEM;
 606         newinfo->data.mem = g_strdup("Version: 1\n");
 607         g_node_append(encmultipart->node, newinfo->node);
 608
 609         newinfo = procmime_mimeinfo_new();
 610         newinfo->type = MIMETYPE_APPLICATION;
 611         newinfo->subtype = g_strdup("octet-stream");
 612         newinfo->content = MIMECONTENT_MEM;
 613         newinfo->data.mem = g_malloc(len + 1);
 614         g_memmove(newinfo->data.mem, enccontent, len);
 615         newinfo->data.mem[len] = '\0';
 616         g_node_append(encmultipart->node, newinfo->node);
 617
 618         g_free(enccontent);
 619
 620         return TRUE;
 621 }
 622
 623 static PrivacySystem pgpmime_system = {
 624         "pgpmime",                      /* id */
 625         "PGP MIME",                     /* name */
 626
 627         pgpmime_free_privacydata,       /* free_privacydata */
 628
 629         pgpmime_is_signed,              /* is_signed(MimeInfo *) */
 630         pgpmime_check_signature,        /* check_signature(MimeInfo *) */
 631         pgpmime_get_sig_status,         /* get_sig_status(MimeInfo *) */
 632         pgpmime_get_sig_info_short,     /* get_sig_info_short(MimeInfo *) */
 633         pgpmime_get_sig_info_full,      /* get_sig_info_full(MimeInfo *) */
 634
 635         pgpmime_is_encrypted,           /* is_encrypted(MimeInfo *) */
 636         pgpmime_decrypt,                /* decrypt(MimeInfo *) */
 637
 638         TRUE,
 639         pgpmime_sign,
 640
 641         TRUE,
 642         pgpmime_get_encrypt_data,
 643         pgpmime_encrypt,
 644 };
 645
 646 void pgpmime_init()
 647 {
 648         privacy_register_system(&pgpmime_system);
 649 }
 650
 651 void pgpmime_done()
 652 {
 653         privacy_unregister_system(&pgpmime_system);
 654 }
 655
 656 #endif /* USE_GPGME */