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         if (fp == NULL) {
 200                 perror("my_tmpfile");
 201                 return 0;
 202         }
 203         g_return_val_if_fail(fp != NULL, SIGNATURE_INVALID);
 204
 205         boundary = g_hash_table_lookup(parent->typeparameters, "boundary");
 206         if (!boundary)
 207                 return 0;
 208
 209         textstr = get_canonical_content(fp, boundary);
 210
 211         err = gpgme_data_new_from_mem(&textdata, textstr, strlen(textstr), 0);
 212         if (err) {
 213                 debug_print ("gpgme_data_new_from_mem failed: %s\n",
 214                    gpgme_strerror (err));
 215         }
 216         signature = (MimeInfo *) mimeinfo->node->next->data;
 217         sigdata = sgpgme_data_from_mimeinfo(signature);
 218
 219         err = 0;
 220         if (signature->encoding_type == ENC_BASE64) {
 221                 err = gpgme_data_set_encoding (sigdata, GPGME_DATA_ENCODING_BASE64);
 222         }
 223
 224         if (err) {
 225                 debug_print ("gpgme_data_set_encoding failed: %s\n",
 226                         gpgme_strerror (err));
 227         }
 228
 229         data->sigstatus =
 230                 sgpgme_verify_signature (data->ctx, sigdata, textdata, NULL);
 231
 232         gpgme_data_release(sigdata);
 233         gpgme_data_release(textdata);
 234         g_free(textstr);
 235         fclose(fp);
 236
 237         return 0;
 238 }
 239
 240 static SignatureStatus pgpmime_get_sig_status(MimeInfo *mimeinfo)
 241 {
 242         PrivacyDataPGP *data = (PrivacyDataPGP *) mimeinfo->privacy;
 243
 244         g_return_val_if_fail(data != NULL, SIGNATURE_INVALID);
 245
 246         if (data->sigstatus == NULL &&
 247             prefs_gpg_get_config()->auto_check_signatures)
 248                 pgpmime_check_signature(mimeinfo);
 249
 250         return sgpgme_sigstat_gpgme_to_privacy(data->ctx, data->sigstatus);
 251 }
 252
 253 static gchar *pgpmime_get_sig_info_short(MimeInfo *mimeinfo)
 254 {
 255         PrivacyDataPGP *data = (PrivacyDataPGP *) mimeinfo->privacy;
 256
 257         g_return_val_if_fail(data != NULL, g_strdup("Error"));
 258
 259         if (data->sigstatus == NULL &&
 260             prefs_gpg_get_config()->auto_check_signatures)
 261                 pgpmime_check_signature(mimeinfo);
 262
 263         return sgpgme_sigstat_info_short(data->ctx, data->sigstatus);
 264 }
 265
 266 static gchar *pgpmime_get_sig_info_full(MimeInfo *mimeinfo)
 267 {
 268         PrivacyDataPGP *data = (PrivacyDataPGP *) mimeinfo->privacy;
 269
 270         g_return_val_if_fail(data != NULL, g_strdup("Error"));
 271
 272         if (data->sigstatus == NULL &&
 273             prefs_gpg_get_config()->auto_check_signatures)
 274                 pgpmime_check_signature(mimeinfo);
 275
 276         return sgpgme_sigstat_info_full(data->ctx, data->sigstatus);
 277 }
 278
 279 static gboolean pgpmime_is_encrypted(MimeInfo *mimeinfo)
 280 {
 281         MimeInfo *tmpinfo;
 282         const gchar *tmpstr;
 283
 284         if (mimeinfo->type != MIMETYPE_MULTIPART)
 285                 return FALSE;
 286         if (g_ascii_strcasecmp(mimeinfo->subtype, "encrypted"))
 287                 return FALSE;
 288         tmpstr = procmime_mimeinfo_get_parameter(mimeinfo, "protocol");
 289         if ((tmpstr == NULL) || g_ascii_strcasecmp(tmpstr, "application/pgp-encrypted"))
 290                 return FALSE;
 291         if (g_node_n_children(mimeinfo->node) != 2)
 292                 return FALSE;
 293
 294         tmpinfo = (MimeInfo *) g_node_nth_child(mimeinfo->node, 0)->data;
 295         if (tmpinfo->type != MIMETYPE_APPLICATION)
 296                 return FALSE;
 297         if (g_ascii_strcasecmp(tmpinfo->subtype, "pgp-encrypted"))
 298                 return FALSE;
 299
 300         tmpinfo = (MimeInfo *) g_node_nth_child(mimeinfo->node, 1)->data;
 301         if (tmpinfo->type != MIMETYPE_APPLICATION)
 302                 return FALSE;
 303         if (g_ascii_strcasecmp(tmpinfo->subtype, "octet-stream"))
 304                 return FALSE;
 305
 306         return TRUE;
 307 }
 308
 309 static MimeInfo *pgpmime_decrypt(MimeInfo *mimeinfo)
 310 {
 311         MimeInfo *encinfo, *decinfo, *parseinfo;
 312         gpgme_data_t cipher = NULL, plain = NULL;
 313         static gint id = 0;
 314         FILE *dstfp;
 315         gchar *fname;
 316         gpgme_verify_result_t sigstat = NULL;
 317         PrivacyDataPGP *data = NULL;
 318         gpgme_ctx_t ctx;
 319         gchar *chars;
 320         size_t len;
 321
 322         if (gpgme_new(&ctx) != GPG_ERR_NO_ERROR)
 323                 return NULL;
 324
 325
 326         g_return_val_if_fail(pgpmime_is_encrypted(mimeinfo), NULL);
 327
 328         encinfo = (MimeInfo *) g_node_nth_child(mimeinfo->node, 1)->data;
 329
 330         cipher = sgpgme_data_from_mimeinfo(encinfo);
 331         plain = sgpgme_decrypt_verify(cipher, &sigstat, ctx);
 332
 333         gpgme_data_release(cipher);
 334         if (plain == NULL) {
 335                 debug_print("plain is null!\n");
 336                 gpgme_release(ctx);
 337                 return NULL;
 338         }
 339
 340         fname = g_strdup_printf("%s%cplaintext.%08x",
 341                 get_mime_tmp_dir(), G_DIR_SEPARATOR, ++id);
 342
 343         if ((dstfp = g_fopen(fname, "wb")) == NULL) {
 344                 FILE_OP_ERROR(fname, "fopen");
 345                 g_free(fname);
 346                 gpgme_data_release(plain);
 347                 gpgme_release(ctx);
 348                 debug_print("can't open!\n");
 349                 return NULL;
 350         }
 351
 352         fprintf(dstfp, "MIME-Version: 1.0\n");
 353
 354         chars = gpgme_data_release_and_get_mem(plain, &len);
 355         if (len > 0)
 356                 fwrite(chars, len, 1, dstfp);
 357         fclose(dstfp);
 358
 359         parseinfo = procmime_scan_file(fname);
 360         g_free(fname);
 361         if (parseinfo == NULL) {
 362                 gpgme_release(ctx);
 363                 return NULL;
 364         }
 365         decinfo = g_node_first_child(parseinfo->node) != NULL ?
 366                 g_node_first_child(parseinfo->node)->data : NULL;
 367         if (decinfo == NULL) {
 368                 gpgme_release(ctx);
 369                 return NULL;
 370         }
 371
 372         g_node_unlink(decinfo->node);
 373         procmime_mimeinfo_free_all(parseinfo);
 374
 375         decinfo->tmp = TRUE;
 376
 377         if (sigstat != NULL && sigstat->signatures != NULL) {
 378                 if (decinfo->privacy != NULL) {
 379                         data = (PrivacyDataPGP *) decinfo->privacy;
 380                 } else {
 381                         data = pgpmime_new_privacydata();
 382                         decinfo->privacy = (PrivacyData *) data;
 383                 }
 384                 data->done_sigtest = TRUE;
 385                 data->is_signed = TRUE;
 386                 data->sigstatus = sigstat;
 387                 if (data->ctx)
 388                         gpgme_release(data->ctx);
 389                 data->ctx = ctx;
 390         } else
 391                 gpgme_release(ctx);
 392
 393         return decinfo;
 394 }
 395
 396 gboolean pgpmime_sign(MimeInfo *mimeinfo, PrefsAccount *account)
 397 {
 398         MimeInfo *msgcontent, *sigmultipart, *newinfo;
 399         gchar *textstr, *micalg;
 400         FILE *fp;
 401         gchar *boundary = NULL;
 402         gchar *sigcontent;
 403         gpgme_ctx_t ctx;
 404         gpgme_data_t gpgtext, gpgsig;
 405         size_t len;
 406         struct passphrase_cb_info_s info;
 407         gpgme_sign_result_t result = NULL;
 408         gchar *test_msg;
 409
 410         fp = my_tmpfile();
 411         if (fp == NULL) {
 412                 perror("my_tmpfile");
 413                 return FALSE;
 414         }
 415         procmime_write_mimeinfo(mimeinfo, fp);
 416         rewind(fp);
 417
 418         /* read temporary file into memory */
 419         test_msg = file_read_stream_to_str(fp);
 420         fclose(fp);
 421
 422         memset (&info, 0, sizeof info);
 423
 424         /* remove content node from message */
 425         msgcontent = (MimeInfo *) mimeinfo->node->children->data;
 426         g_node_unlink(msgcontent->node);
 427
 428         /* create temporary multipart for content */
 429         sigmultipart = procmime_mimeinfo_new();
 430         sigmultipart->type = MIMETYPE_MULTIPART;
 431         sigmultipart->subtype = g_strdup("signed");
 432
 433         do {
 434                 if (boundary)
 435                         g_free(boundary);
 436                 boundary = generate_mime_boundary("Sig");
 437         } while (strstr(test_msg, boundary) != NULL);
 438
 439         g_free(test_msg);
 440
 441         g_hash_table_insert(sigmultipart->typeparameters, g_strdup("boundary"),
 442                             g_strdup(boundary));
 443         g_hash_table_insert(sigmultipart->typeparameters, g_strdup("protocol"),
 444                             g_strdup("application/pgp-signature"));
 445         g_node_append(sigmultipart->node, msgcontent->node);
 446         g_node_append(mimeinfo->node, sigmultipart->node);
 447
 448         /* write message content to temporary file */
 449         fp = my_tmpfile();
 450         if (fp == NULL) {
 451                 perror("my_tmpfile");
 452                 return FALSE;
 453         }
 454         procmime_write_mimeinfo(sigmultipart, fp);
 455         rewind(fp);
 456
 457         /* read temporary file into memory */
 458         textstr = get_canonical_content(fp, boundary);
 459
 460         fclose(fp);
 461
 462         gpgme_data_new_from_mem(&gpgtext, textstr, strlen(textstr), 0);
 463         gpgme_data_new(&gpgsig);
 464         gpgme_new(&ctx);
 465         gpgme_set_textmode(ctx, 1);
 466         gpgme_set_armor(ctx, 1);
 467         gpgme_signers_clear (ctx);
 468
 469         if (!sgpgme_setup_signers(ctx, account)) {
 470                 gpgme_release(ctx);
 471                 return FALSE;
 472         }
 473
 474         if (!getenv("GPG_AGENT_INFO")) {
 475                 info.c = ctx;
 476                 gpgme_set_passphrase_cb (ctx, gpgmegtk_passphrase_cb, &info);
 477         }
 478
 479         if (gpgme_op_sign(ctx, gpgtext, gpgsig, GPGME_SIG_MODE_DETACH) != GPG_ERR_NO_ERROR) {
 480                 gpgme_release(ctx);
 481                 return FALSE;
 482         }
 483         result = gpgme_op_sign_result(ctx);
 484         if (result && result->signatures) {
 485             if (gpgme_get_protocol(ctx) == GPGME_PROTOCOL_OpenPGP) {
 486                 micalg = g_strdup_printf("PGP-%s", gpgme_hash_algo_name(
 487                             result->signatures->hash_algo));
 488             } else {
 489                 micalg = g_strdup(gpgme_hash_algo_name(
 490                             result->signatures->hash_algo));
 491             }
 492         } else {
 493             /* can't get result (maybe no signing key?) */
 494             return FALSE;
 495         }
 496
 497         gpgme_release(ctx);
 498         sigcontent = gpgme_data_release_and_get_mem(gpgsig, &len);
 499         gpgme_data_release(gpgtext);
 500         g_free(textstr);
 501
 502         /* add signature */
 503         g_hash_table_insert(sigmultipart->typeparameters, g_strdup("micalg"),
 504                             micalg);
 505
 506         newinfo = procmime_mimeinfo_new();
 507         newinfo->type = MIMETYPE_APPLICATION;
 508         newinfo->subtype = g_strdup("pgp-signature");
 509         newinfo->content = MIMECONTENT_MEM;
 510         newinfo->data.mem = g_malloc(len + 1);
 511         g_memmove(newinfo->data.mem, sigcontent, len);
 512         newinfo->data.mem[len] = '\0';
 513         g_node_append(sigmultipart->node, newinfo->node);
 514
 515         g_free(sigcontent);
 516
 517         return TRUE;
 518 }
 519 gchar *pgpmime_get_encrypt_data(GSList *recp_names)
 520 {
 521         return sgpgme_get_encrypt_data(recp_names);
 522 }
 523
 524 gboolean pgpmime_encrypt(MimeInfo *mimeinfo, const gchar *encrypt_data)
 525 {
 526         MimeInfo *msgcontent, *encmultipart, *newinfo;
 527         FILE *fp;
 528         gchar *boundary, *enccontent;
 529         size_t len;
 530         gchar *textstr;
 531         gpgme_data_t gpgtext = NULL, gpgenc = NULL;
 532         gpgme_ctx_t ctx = NULL;
 533         gpgme_key_t *kset = NULL;
 534         gchar **fprs = g_strsplit(encrypt_data, " ", -1);
 535         gint i = 0;
 536         while (fprs[i] && strlen(fprs[i])) {
 537                 i++;
 538         }
 539
 540         kset = g_malloc(sizeof(gpgme_key_t)*(i+1));
 541         memset(kset, 0, sizeof(gpgme_key_t)*(i+1));
 542         gpgme_new(&ctx);
 543         i = 0;
 544         while (fprs[i] && strlen(fprs[i])) {
 545                 gpgme_key_t key;
 546                 gpgme_error_t err;
 547                 err = gpgme_get_key(ctx, fprs[i], &key, 0);
 548                 if (err) {
 549                         debug_print("can't add key '%s'[%d] (%s)\n", fprs[i],i, gpgme_strerror(err));
 550                         break;
 551                 }
 552                 debug_print("found %s at %d\n", fprs[i], i);
 553                 kset[i] = key;
 554                 i++;
 555         }
 556
 557         debug_print("Encrypting message content\n");
 558
 559         /* remove content node from message */
 560         msgcontent = (MimeInfo *) mimeinfo->node->children->data;
 561         g_node_unlink(msgcontent->node);
 562
 563         /* create temporary multipart for content */
 564         encmultipart = procmime_mimeinfo_new();
 565         encmultipart->type = MIMETYPE_MULTIPART;
 566         encmultipart->subtype = g_strdup("encrypted");
 567         boundary = generate_mime_boundary("Encrypt");
 568         g_hash_table_insert(encmultipart->typeparameters, g_strdup("boundary"),
 569                             g_strdup(boundary));
 570         g_hash_table_insert(encmultipart->typeparameters, g_strdup("protocol"),
 571                             g_strdup("application/pgp-encrypted"));
 572         g_node_append(encmultipart->node, msgcontent->node);
 573
 574         /* write message content to temporary file */
 575         fp = my_tmpfile();
 576         if (fp == NULL) {
 577                 perror("my_tmpfile");
 578                 return FALSE;
 579         }
 580         procmime_write_mimeinfo(encmultipart, fp);
 581         rewind(fp);
 582
 583         /* read temporary file into memory */
 584         textstr = get_canonical_content(fp, boundary);
 585
 586         fclose(fp);
 587
 588         /* encrypt data */
 589         gpgme_data_new_from_mem(&gpgtext, textstr, strlen(textstr), 0);
 590         gpgme_data_new(&gpgenc);
 591         gpgme_set_armor(ctx, 1);
 592         gpgme_data_rewind(gpgtext);
 593
 594         gpgme_op_encrypt(ctx, kset, GPGME_ENCRYPT_ALWAYS_TRUST, gpgtext, gpgenc);
 595
 596         gpgme_release(ctx);
 597         enccontent = gpgme_data_release_and_get_mem(gpgenc, &len);
 598         gpgme_data_release(gpgtext);
 599         g_free(textstr);
 600
 601         /* create encrypted multipart */
 602         g_node_unlink(msgcontent->node);
 603         procmime_mimeinfo_free_all(msgcontent);
 604         g_node_append(mimeinfo->node, encmultipart->node);
 605
 606         newinfo = procmime_mimeinfo_new();
 607         newinfo->type = MIMETYPE_APPLICATION;
 608         newinfo->subtype = g_strdup("pgp-encrypted");
 609         newinfo->content = MIMECONTENT_MEM;
 610         newinfo->data.mem = g_strdup("Version: 1\n");
 611         g_node_append(encmultipart->node, newinfo->node);
 612
 613         newinfo = procmime_mimeinfo_new();
 614         newinfo->type = MIMETYPE_APPLICATION;
 615         newinfo->subtype = g_strdup("octet-stream");
 616         newinfo->content = MIMECONTENT_MEM;
 617         newinfo->data.mem = g_malloc(len + 1);
 618         g_memmove(newinfo->data.mem, enccontent, len);
 619         newinfo->data.mem[len] = '\0';
 620         g_node_append(encmultipart->node, newinfo->node);
 621
 622         g_free(enccontent);
 623
 624         return TRUE;
 625 }
 626
 627 static PrivacySystem pgpmime_system = {
 628         "pgpmime",                      /* id */
 629         "PGP MIME",                     /* name */
 630
 631         pgpmime_free_privacydata,       /* free_privacydata */
 632
 633         pgpmime_is_signed,              /* is_signed(MimeInfo *) */
 634         pgpmime_check_signature,        /* check_signature(MimeInfo *) */
 635         pgpmime_get_sig_status,         /* get_sig_status(MimeInfo *) */
 636         pgpmime_get_sig_info_short,     /* get_sig_info_short(MimeInfo *) */
 637         pgpmime_get_sig_info_full,      /* get_sig_info_full(MimeInfo *) */
 638
 639         pgpmime_is_encrypted,           /* is_encrypted(MimeInfo *) */
 640         pgpmime_decrypt,                /* decrypt(MimeInfo *) */
 641
 642         TRUE,
 643         pgpmime_sign,
 644
 645         TRUE,
 646         pgpmime_get_encrypt_data,
 647         pgpmime_encrypt,
 648 };
 649
 650 void pgpmime_init()
 651 {
 652         privacy_register_system(&pgpmime_system);
 653 }
 654
 655 void pgpmime_done()
 656 {
 657         privacy_unregister_system(&pgpmime_system);
 658 }
 659
 660 #endif /* USE_GPGME */