src/procmime.c

   1 /*
   2  * Claws Mail -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2020 the Claws Mail Team and Hiroyuki Yamamoto
   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 #include <stdio.h>
  25
  26 #include "defs.h"
  27
  28 #include <glib.h>
  29 #include <glib/gi18n.h>
  30 #include <string.h>
  31 #if HAVE_LOCALE_H
  32 #  include <locale.h>
  33 #endif
  34 #include <ctype.h>
  35 #include <sys/types.h>
  36 #include <sys/stat.h>
  37 #include <unistd.h>
  38 #include <errno.h>
  39
  40 #include "procmime.h"
  41 #include "procheader.h"
  42 #include "quoted-printable.h"
  43 #include "uuencode.h"
  44 #include "unmime.h"
  45 #include "html.h"
  46 #include "enriched.h"
  47 #include "codeconv.h"
  48 #include "utils.h"
  49 #include "prefs_common.h"
  50 #include "prefs_gtk.h"
  51 #include "alertpanel.h"
  52 #include "timing.h"
  53 #include "privacy.h"
  54 #include "account.h"
  55 #include "file-utils.h"
  56
  57 static GHashTable *procmime_get_mime_type_table (void);
  58 static MimeInfo *procmime_scan_file_short(const gchar *filename);
  59 static MimeInfo *procmime_scan_queue_file_short(const gchar *filename);
  60 static MimeInfo *procmime_scan_queue_file_full(const gchar *filename, gboolean short_scan);
  61
  62 MimeInfo *procmime_mimeinfo_new(void)
  63 {
  64         MimeInfo *mimeinfo;
  65
  66         mimeinfo = g_new0(MimeInfo, 1);
  67
  68         mimeinfo->content        = MIMECONTENT_EMPTY;
  69         mimeinfo->data.filename  = NULL;
  70
  71         mimeinfo->type           = MIMETYPE_UNKNOWN;
  72         mimeinfo->encoding_type  = ENC_UNKNOWN;
  73         mimeinfo->typeparameters = g_hash_table_new(g_str_hash, g_str_equal);
  74
  75         mimeinfo->disposition    = DISPOSITIONTYPE_UNKNOWN;
  76         mimeinfo->dispositionparameters
  77                                  = g_hash_table_new(g_str_hash, g_str_equal);
  78
  79         mimeinfo->node           = g_node_new(mimeinfo);
  80
  81         return mimeinfo;
  82 }
  83
  84 static gboolean procmime_mimeinfo_parameters_destroy(gpointer key, gpointer value, gpointer user_data)
  85 {
  86         g_free(key);
  87         g_free(value);
  88
  89         return TRUE;
  90 }
  91
  92 static gchar *forced_charset = NULL;
  93
  94 void procmime_force_charset(const gchar *str)
  95 {
  96         g_free(forced_charset);
  97         forced_charset = NULL;
  98         if (str)
  99                 forced_charset = g_strdup(str);
 100 }
 101
 102 static EncodingType forced_encoding = 0;
 103
 104 void procmime_force_encoding(EncodingType encoding)
 105 {
 106         forced_encoding = encoding;
 107 }
 108
 109 static gboolean free_func(GNode *node, gpointer data)
 110 {
 111         MimeInfo *mimeinfo = (MimeInfo *) node->data;
 112
 113         switch (mimeinfo->content) {
 114         case MIMECONTENT_FILE:
 115                 if (mimeinfo->tmp)
 116                         claws_unlink(mimeinfo->data.filename);
 117                 g_free(mimeinfo->data.filename);
 118                 break;
 119
 120         case MIMECONTENT_MEM:
 121                 if (mimeinfo->tmp)
 122                         g_free(mimeinfo->data.mem);
 123         default:
 124                 break;
 125         }
 126
 127         g_free(mimeinfo->subtype);
 128         g_free(mimeinfo->description);
 129         g_free(mimeinfo->id);
 130         g_free(mimeinfo->location);
 131
 132         g_hash_table_foreach_remove(mimeinfo->typeparameters,
 133                 procmime_mimeinfo_parameters_destroy, NULL);
 134         g_hash_table_destroy(mimeinfo->typeparameters);
 135         g_hash_table_foreach_remove(mimeinfo->dispositionparameters,
 136                 procmime_mimeinfo_parameters_destroy, NULL);
 137         g_hash_table_destroy(mimeinfo->dispositionparameters);
 138
 139         if (mimeinfo->privacy)
 140                 privacy_free_privacydata(mimeinfo->privacy);
 141
 142         g_free(mimeinfo);
 143
 144         return FALSE;
 145 }
 146
 147 void procmime_mimeinfo_free_all(MimeInfo **mimeinfo_ptr)
 148 {
 149         MimeInfo *mimeinfo = *mimeinfo_ptr;
 150         GNode *node;
 151
 152         if (!mimeinfo)
 153                 return;
 154
 155         node = mimeinfo->node;
 156         g_node_traverse(node, G_IN_ORDER, G_TRAVERSE_ALL, -1, free_func, NULL);
 157
 158         g_node_destroy(node);
 159
 160         *mimeinfo_ptr = NULL;
 161 }
 162
 163 MimeInfo *procmime_mimeinfo_parent(MimeInfo *mimeinfo)
 164 {
 165         cm_return_val_if_fail(mimeinfo != NULL, NULL);
 166         cm_return_val_if_fail(mimeinfo->node != NULL, NULL);
 167
 168         if (mimeinfo->node->parent == NULL)
 169                 return NULL;
 170         return (MimeInfo *) mimeinfo->node->parent->data;
 171 }
 172
 173 MimeInfo *procmime_mimeinfo_next(MimeInfo *mimeinfo)
 174 {
 175         cm_return_val_if_fail(mimeinfo != NULL, NULL);
 176         cm_return_val_if_fail(mimeinfo->node != NULL, NULL);
 177
 178         if (mimeinfo->node->children)
 179                 return (MimeInfo *) mimeinfo->node->children->data;
 180         if (mimeinfo->node->next)
 181                 return (MimeInfo *) mimeinfo->node->next->data;
 182
 183         if (mimeinfo->node->parent == NULL)
 184                 return NULL;
 185
 186         while (mimeinfo->node->parent != NULL) {
 187                 mimeinfo = (MimeInfo *) mimeinfo->node->parent->data;
 188                 if (mimeinfo->node->next)
 189                         return (MimeInfo *) mimeinfo->node->next->data;
 190         }
 191
 192         return NULL;
 193 }
 194
 195 MimeInfo *procmime_scan_message(MsgInfo *msginfo)
 196 {
 197         gchar *filename;
 198         MimeInfo *mimeinfo;
 199
 200         filename = procmsg_get_message_file_path(msginfo);
 201         if (!filename || !is_file_exist(filename)) {
 202                 g_free(filename);
 203                 return NULL;
 204         }
 205
 206         if (!folder_has_parent_of_type(msginfo->folder, F_QUEUE) &&
 207             !folder_has_parent_of_type(msginfo->folder, F_DRAFT))
 208                 mimeinfo = procmime_scan_file(filename);
 209         else
 210                 mimeinfo = procmime_scan_queue_file(filename);
 211         g_free(filename);
 212
 213         return mimeinfo;
 214 }
 215
 216 MimeInfo *procmime_scan_message_short(MsgInfo *msginfo)
 217 {
 218         gchar *filename;
 219         MimeInfo *mimeinfo;
 220
 221         filename = procmsg_get_message_file_path(msginfo);
 222         if (!filename || !is_file_exist(filename)) {
 223                 g_free(filename);
 224                 return NULL;
 225         }
 226
 227         if (!folder_has_parent_of_type(msginfo->folder, F_QUEUE) &&
 228             !folder_has_parent_of_type(msginfo->folder, F_DRAFT))
 229                 mimeinfo = procmime_scan_file_short(filename);
 230         else
 231                 mimeinfo = procmime_scan_queue_file_short(filename);
 232         g_free(filename);
 233
 234         return mimeinfo;
 235 }
 236
 237 enum
 238 {
 239         H_CONTENT_TRANSFER_ENCODING = 0,
 240         H_CONTENT_TYPE              = 1,
 241         H_CONTENT_DISPOSITION       = 2,
 242         H_CONTENT_DESCRIPTION       = 3,
 243         H_SUBJECT                   = 4
 244 };
 245
 246 const gchar *procmime_mimeinfo_get_parameter(MimeInfo *mimeinfo, const gchar *name)
 247 {
 248         const gchar *value;
 249
 250         cm_return_val_if_fail(mimeinfo != NULL, NULL);
 251         cm_return_val_if_fail(name != NULL, NULL);
 252
 253         value = g_hash_table_lookup(mimeinfo->dispositionparameters, name);
 254         if (value == NULL)
 255                 value = g_hash_table_lookup(mimeinfo->typeparameters, name);
 256
 257         return value;
 258 }
 259
 260 #define FLUSH_LASTLINE() {                                                      \
 261         if (*lastline != '\0') {                                                \
 262                 gint llen = 0;                                                  \
 263                 strretchomp(lastline);                                          \
 264                 llen = strlen(lastline);                                        \
 265                 if (lastline[llen-1] == ' ' && !account_sigsep_matchlist_str_found(lastline, "%s") &&   \
 266                     !(llen == 2 && lastline[1] == ' ' && strchr(prefs_common.quote_chars, lastline[0]))) {                                      \
 267                         /* this is flowed */                                    \
 268                         if (delsp)                                              \
 269                                 lastline[llen-1] = '\0';                        \
 270                         if (claws_fputs(lastline, outfp) == EOF)                        \
 271                                 err = TRUE;                                     \
 272                 } else {                                                        \
 273                         if (claws_fputs(lastline, outfp) == EOF)                        \
 274                                 err = TRUE;                                     \
 275                         if (claws_fputs("\n", outfp) == EOF)                            \
 276                                 err = TRUE;                                     \
 277                 }                                                               \
 278         }                                                                       \
 279         strcpy(lastline, buf);                                                  \
 280 }
 281
 282 gboolean procmime_decode_content(MimeInfo *mimeinfo)
 283 {
 284         gchar buf[BUFFSIZE];
 285         gint readend;
 286         gchar *tmpfilename;
 287         FILE *outfp, *infp;
 288         GStatBuf statbuf;
 289         gboolean tmp_file = FALSE;
 290         gboolean flowed = FALSE;
 291         gboolean delsp = FALSE;
 292         gboolean err = FALSE;
 293         gint state = 0;
 294         guint save = 0;
 295
 296         cm_return_val_if_fail(mimeinfo != NULL, FALSE);
 297
 298         EncodingType encoding = forced_encoding
 299                                 ? forced_encoding
 300                                 : mimeinfo->encoding_type;
 301         gchar lastline[BUFFSIZE];
 302         memset(lastline, 0, BUFFSIZE);
 303
 304         if (prefs_common.respect_flowed_format &&
 305             mimeinfo->type == MIMETYPE_TEXT &&
 306             !strcasecmp(mimeinfo->subtype, "plain")) {
 307                 if (procmime_mimeinfo_get_parameter(mimeinfo, "format") != NULL &&
 308                     !strcasecmp(procmime_mimeinfo_get_parameter(mimeinfo, "format"),"flowed"))
 309                         flowed = TRUE;
 310                 if (flowed &&
 311                     procmime_mimeinfo_get_parameter(mimeinfo, "delsp") != NULL &&
 312                     !strcasecmp(procmime_mimeinfo_get_parameter(mimeinfo, "delsp"),"yes"))
 313                         delsp = TRUE;
 314         }
 315
 316         if (!flowed && (
 317              encoding == ENC_UNKNOWN ||
 318              encoding == ENC_BINARY ||
 319              encoding == ENC_7BIT ||
 320              encoding == ENC_8BIT
 321             ))
 322                 return TRUE;
 323
 324         if (mimeinfo->type == MIMETYPE_MULTIPART || mimeinfo->type == MIMETYPE_MESSAGE)
 325                 return TRUE;
 326
 327         if (mimeinfo->data.filename == NULL)
 328                 return FALSE;
 329
 330         infp = claws_fopen(mimeinfo->data.filename, "rb");
 331         if (!infp) {
 332                 FILE_OP_ERROR(mimeinfo->data.filename, "claws_fopen");
 333                 return FALSE;
 334         }
 335         if (fseek(infp, mimeinfo->offset, SEEK_SET) < 0) {
 336                 FILE_OP_ERROR(mimeinfo->data.filename, "fseek");
 337                 claws_fclose(infp);
 338                 return FALSE;
 339         }
 340
 341         outfp = get_tmpfile_in_dir(get_mime_tmp_dir(), &tmpfilename);
 342         if (!outfp) {
 343                 perror("tmpfile");
 344                 claws_fclose(infp);
 345                 return FALSE;
 346         }
 347
 348         tmp_file = TRUE;
 349         readend = mimeinfo->offset + mimeinfo->length;
 350
 351         account_sigsep_matchlist_create(); /* FLUSH_LASTLINE will use it */
 352
 353         *buf = '\0';
 354         if (encoding == ENC_QUOTED_PRINTABLE) {
 355                 while ((ftell(infp) < readend) && (claws_fgets(buf, sizeof(buf), infp) != NULL)) {
 356                         gint len;
 357                         len = qp_decode_line(buf);
 358                         buf[len] = '\0';
 359                         if (!flowed) {
 360                                 if (claws_fwrite(buf, 1, len, outfp) < len)
 361                                         err = TRUE;
 362                         } else {
 363                                 FLUSH_LASTLINE();
 364                         }
 365                 }
 366                 if (flowed)
 367                         FLUSH_LASTLINE();
 368         } else if (encoding == ENC_BASE64) {
 369                 gchar outbuf[BUFFSIZE + 1];
 370                 gint len, inlen, inread;
 371                 gboolean got_error = FALSE;
 372                 gboolean uncanonicalize = FALSE;
 373                 FILE *tmpfp = NULL;
 374                 gboolean null_bytes = FALSE;
 375                 gboolean starting = TRUE;
 376
 377                 if (mimeinfo->type == MIMETYPE_TEXT ||
 378                     mimeinfo->type == MIMETYPE_MESSAGE) {
 379                         uncanonicalize = TRUE;
 380                         tmpfp = my_tmpfile();
 381                         if (!tmpfp) {
 382                                 perror("my_tmpfile");
 383                                 if (tmp_file)
 384                                         claws_fclose(outfp);
 385                                 claws_fclose(infp);
 386                                 return FALSE;
 387                         }
 388                 } else
 389                         tmpfp = outfp;
 390
 391                 while ((inlen = MIN(readend - ftell(infp), sizeof(buf))) > 0 && !err) {
 392                         inread = claws_fread(buf, 1, inlen, infp);
 393                         memset(outbuf, 0, sizeof(buf));
 394                         len = g_base64_decode_step(buf, inlen, outbuf, &state, &save);
 395                         if (uncanonicalize == TRUE && strlen(outbuf) < len && starting) {
 396                                 uncanonicalize = FALSE;
 397                                 null_bytes = TRUE;
 398                         }
 399                         starting = FALSE;
 400                         if (((inread != inlen) || len < 0) && !got_error) {
 401                                 g_warning("Bad BASE64 content.");
 402                                 if (claws_fwrite(_("[Error decoding BASE64]\n"),
 403                                         sizeof(gchar),
 404                                         strlen(_("[Error decoding BASE64]\n")),
 405                                         tmpfp) < strlen(_("[Error decoding BASE64]\n")))
 406                                         g_warning("error decoding BASE64");
 407                                 got_error = TRUE;
 408                                 continue;
 409                         } else if (len >= 0) {
 410                                 /* print out the error message only once
 411                                  * per block */
 412                                 if (null_bytes) {
 413                                         /* we won't uncanonicalize, output to outfp directly */
 414                                         if (claws_fwrite(outbuf, sizeof(gchar), len, outfp) < len)
 415                                                 err = TRUE;
 416                                 } else {
 417                                         if (claws_fwrite(outbuf, sizeof(gchar), len, tmpfp) < len)
 418                                                 err = TRUE;
 419                                 }
 420                                 got_error = FALSE;
 421                         }
 422                 }
 423
 424                 if (uncanonicalize) {
 425                         rewind(tmpfp);
 426                         while (claws_fgets(buf, sizeof(buf), tmpfp) != NULL) {
 427                                 strcrchomp(buf);
 428                                 if (claws_fputs(buf, outfp) == EOF)
 429                                         err = TRUE;
 430                         }
 431                 }
 432                 if (tmpfp != outfp) {
 433                         claws_fclose(tmpfp);
 434                 }
 435         } else if (encoding == ENC_X_UUENCODE) {
 436                 gchar outbuf[BUFFSIZE];
 437                 gint len;
 438                 gboolean flag = FALSE;
 439
 440                 while ((ftell(infp) < readend) && (claws_fgets(buf, sizeof(buf), infp) != NULL)) {
 441                         if (!flag && strncmp(buf,"begin ", 6)) continue;
 442
 443                         if (flag) {
 444                                 len = fromuutobits(outbuf, buf);
 445                                 if (len <= 0) {
 446                                         if (len < 0)
 447                                                 g_warning("Bad UUENCODE content (%d)", len);
 448                                         break;
 449                                 }
 450                                 if (claws_fwrite(outbuf, sizeof(gchar), len, outfp) < len)
 451                                         err = TRUE;
 452                         } else
 453                                 flag = TRUE;
 454                 }
 455         } else {
 456                 while ((ftell(infp) < readend) && (claws_fgets(buf, sizeof(buf), infp) != NULL)) {
 457                         if (!flowed) {
 458                                 if (claws_fputs(buf, outfp) == EOF)
 459                                         err = TRUE;
 460                         } else {
 461                                 FLUSH_LASTLINE();
 462                         }
 463                 }
 464                 if (flowed)
 465                         FLUSH_LASTLINE();
 466                 if (err == TRUE)
 467                         g_warning("write error");
 468         }
 469
 470         claws_fclose(outfp);
 471         claws_fclose(infp);
 472
 473         account_sigsep_matchlist_delete();
 474
 475         if (err == TRUE) {
 476                 return FALSE;
 477         }
 478
 479         if (g_stat(tmpfilename, &statbuf) < 0) {
 480                 FILE_OP_ERROR(tmpfilename, "stat");
 481                 return FALSE;
 482         }
 483
 484         if (mimeinfo->tmp)
 485                 claws_unlink(mimeinfo->data.filename);
 486         g_free(mimeinfo->data.filename);
 487         mimeinfo->data.filename = tmpfilename;
 488         mimeinfo->tmp = TRUE;
 489         mimeinfo->offset = 0;
 490         mimeinfo->length = statbuf.st_size;
 491         mimeinfo->encoding_type = ENC_BINARY;
 492
 493         return TRUE;
 494 }
 495
 496 #define B64_LINE_SIZE           57
 497 #define B64_BUFFSIZE            77
 498
 499 gboolean procmime_encode_content(MimeInfo *mimeinfo, EncodingType encoding)
 500 {
 501         FILE *infp = NULL, *outfp;
 502         gint len;
 503         gchar *tmpfilename;
 504         GStatBuf statbuf;
 505         gboolean err = FALSE;
 506
 507         if (mimeinfo->content == MIMECONTENT_EMPTY)
 508                 return TRUE;
 509
 510         if (mimeinfo->encoding_type != ENC_UNKNOWN &&
 511             mimeinfo->encoding_type != ENC_BINARY &&
 512             mimeinfo->encoding_type != ENC_7BIT &&
 513             mimeinfo->encoding_type != ENC_8BIT)
 514                 if(!procmime_decode_content(mimeinfo))
 515                         return FALSE;
 516
 517         outfp = get_tmpfile_in_dir(get_mime_tmp_dir(), &tmpfilename);
 518         if (!outfp) {
 519                 perror("tmpfile");
 520                 return FALSE;
 521         }
 522
 523         if (mimeinfo->content == MIMECONTENT_FILE && mimeinfo->data.filename) {
 524                 if ((infp = claws_fopen(mimeinfo->data.filename, "rb")) == NULL) {
 525                         g_warning("Can't open file %s", mimeinfo->data.filename);
 526                         claws_fclose(outfp);
 527                         return FALSE;
 528                 }
 529         } else if (mimeinfo->content == MIMECONTENT_MEM) {
 530                 infp = str_open_as_stream(mimeinfo->data.mem);
 531                 if (infp == NULL) {
 532                         claws_fclose(outfp);
 533                         return FALSE;
 534                 }
 535         } else {
 536                 claws_fclose(outfp);
 537                 g_warning("Unknown mimeinfo");
 538                 return FALSE;
 539         }
 540
 541         if (encoding == ENC_BASE64) {
 542                 gchar inbuf[B64_LINE_SIZE], *out;
 543                 FILE *tmp_fp = infp;
 544                 gchar *tmp_file = NULL;
 545
 546                 if (mimeinfo->type == MIMETYPE_TEXT ||
 547                      mimeinfo->type == MIMETYPE_MESSAGE) {
 548                         if (mimeinfo->content == MIMECONTENT_FILE) {
 549                                 tmp_file = get_tmp_file();
 550                                 if (canonicalize_file(mimeinfo->data.filename, tmp_file) < 0) {
 551                                         g_free(tmp_file);
 552                                         claws_fclose(infp);
 553                                         claws_fclose(outfp);
 554                                         return FALSE;
 555                                 }
 556                                 if ((tmp_fp = claws_fopen(tmp_file, "rb")) == NULL) {
 557                                         FILE_OP_ERROR(tmp_file, "claws_fopen");
 558                                         claws_unlink(tmp_file);
 559                                         g_free(tmp_file);
 560                                         claws_fclose(infp);
 561                                         claws_fclose(outfp);
 562                                         return FALSE;
 563                                 }
 564                         } else {
 565                                 gchar *out = canonicalize_str(mimeinfo->data.mem);
 566                                 claws_fclose(infp);
 567                                 infp = str_open_as_stream(out);
 568                                 tmp_fp = infp;
 569                                 g_free(out);
 570                                 if (infp == NULL) {
 571                                         claws_fclose(outfp);
 572                                         return FALSE;
 573                                 }
 574                         }
 575                 }
 576
 577                 while ((len = claws_fread(inbuf, sizeof(gchar),
 578                                     B64_LINE_SIZE, tmp_fp))
 579                        == B64_LINE_SIZE) {
 580                         out = g_base64_encode(inbuf, B64_LINE_SIZE);
 581                         if (claws_fputs(out, outfp) == EOF)
 582                                 err = TRUE;
 583                         g_free(out);
 584                         if (claws_fputc('\n', outfp) == EOF)
 585                                 err = TRUE;
 586                 }
 587                 if (len > 0 && claws_feof(tmp_fp)) {
 588                         out = g_base64_encode(inbuf, len);
 589                         if (claws_fputs(out, outfp) == EOF)
 590                                 err = TRUE;
 591                         g_free(out);
 592                         if (claws_fputc('\n', outfp) == EOF)
 593                                 err = TRUE;
 594                 }
 595
 596                 if (tmp_file) {
 597                         claws_fclose(tmp_fp);
 598                         claws_unlink(tmp_file);
 599                         g_free(tmp_file);
 600                 }
 601         } else if (encoding == ENC_QUOTED_PRINTABLE) {
 602                 gchar inbuf[BUFFSIZE], outbuf[BUFFSIZE * 4];
 603
 604                 while (claws_fgets(inbuf, sizeof(inbuf), infp) != NULL) {
 605                         qp_encode_line(outbuf, inbuf);
 606
 607                         if (!strncmp("From ", outbuf, sizeof("From ")-1)) {
 608                                 gchar *tmpbuf = outbuf;
 609
 610                                 tmpbuf += sizeof("From ")-1;
 611
 612                                 if (claws_fputs("=46rom ", outfp) == EOF)
 613                                         err = TRUE;
 614                                 if (claws_fputs(tmpbuf, outfp) == EOF)
 615                                         err = TRUE;
 616                         } else {
 617                                 if (claws_fputs(outbuf, outfp) == EOF)
 618                                         err = TRUE;
 619                         }
 620                 }
 621         } else {
 622                 gchar buf[BUFFSIZE];
 623
 624                 while (claws_fgets(buf, sizeof(buf), infp) != NULL) {
 625                         strcrchomp(buf);
 626                         if (claws_fputs(buf, outfp) == EOF)
 627                                 err = TRUE;
 628                 }
 629         }
 630
 631         claws_fclose(outfp);
 632         claws_fclose(infp);
 633
 634         if (err == TRUE)
 635                 return FALSE;
 636
 637         if (mimeinfo->content == MIMECONTENT_FILE) {
 638                 if (mimeinfo->tmp && (mimeinfo->data.filename != NULL))
 639                         claws_unlink(mimeinfo->data.filename);
 640                 g_free(mimeinfo->data.filename);
 641         } else if (mimeinfo->content == MIMECONTENT_MEM) {
 642                 if (mimeinfo->tmp && (mimeinfo->data.mem != NULL))
 643                         g_free(mimeinfo->data.mem);
 644         }
 645
 646         if (g_stat(tmpfilename, &statbuf) < 0) {
 647                 FILE_OP_ERROR(tmpfilename, "stat");
 648                 return FALSE;
 649         }
 650         mimeinfo->content = MIMECONTENT_FILE;
 651         mimeinfo->data.filename = tmpfilename;
 652         mimeinfo->tmp = TRUE;
 653         mimeinfo->offset = 0;
 654         mimeinfo->length = statbuf.st_size;
 655         mimeinfo->encoding_type = encoding;
 656
 657         return TRUE;
 658 }
 659
 660 static gint procmime_get_part_to_stream(FILE *outfp, MimeInfo *mimeinfo)
 661 {
 662         FILE *infp;
 663         gchar buf[BUFFSIZE];
 664         gint restlength, readlength;
 665         gint saved_errno = 0;
 666
 667         cm_return_val_if_fail(outfp != NULL, -1);
 668         cm_return_val_if_fail(mimeinfo != NULL, -1);
 669
 670         if (mimeinfo->encoding_type != ENC_BINARY && !procmime_decode_content(mimeinfo))
 671                 return -EINVAL;
 672
 673         if ((infp = claws_fopen(mimeinfo->data.filename, "rb")) == NULL) {
 674                 saved_errno = errno;
 675                 FILE_OP_ERROR(mimeinfo->data.filename, "claws_fopen");
 676                 return -(saved_errno);
 677         }
 678         if (fseek(infp, mimeinfo->offset, SEEK_SET) < 0) {
 679                 saved_errno = errno;
 680                 FILE_OP_ERROR(mimeinfo->data.filename, "fseek");
 681                 claws_fclose(infp);
 682                 return -(saved_errno);
 683         }
 684
 685         restlength = mimeinfo->length;
 686
 687         while ((restlength > 0) && ((readlength = claws_fread(buf, 1, restlength > BUFFSIZE ? BUFFSIZE : restlength, infp)) > 0)) {
 688                 if (claws_fwrite(buf, 1, readlength, outfp) != readlength) {
 689                         saved_errno = errno;
 690                         claws_fclose(infp);
 691                         return -(saved_errno);
 692                 }
 693                 restlength -= readlength;
 694         }
 695
 696         claws_fclose(infp);
 697         rewind(outfp);
 698
 699         return 0;
 700 }
 701
 702 gint procmime_get_part(const gchar *outfile, MimeInfo *mimeinfo)
 703 {
 704         FILE *outfp;
 705         gint result;
 706         gint saved_errno = 0;
 707
 708         cm_return_val_if_fail(outfile != NULL, -1);
 709
 710         if ((outfp = claws_fopen(outfile, "wb")) == NULL) {
 711                 saved_errno = errno;
 712                 FILE_OP_ERROR(outfile, "claws_fopen");
 713                 return -(saved_errno);
 714         }
 715
 716         result = procmime_get_part_to_stream(outfp, mimeinfo);
 717
 718         if (claws_fclose(outfp) == EOF) {
 719                 saved_errno = errno;
 720                 FILE_OP_ERROR(outfile, "claws_fclose");
 721                 claws_unlink(outfile);
 722                 return -(saved_errno);
 723         }
 724
 725         return result;
 726 }
 727
 728 gboolean procmime_scan_text_content(MimeInfo *mimeinfo,
 729                 gboolean (*scan_callback)(const gchar *str, gpointer cb_data),
 730                 gpointer cb_data)
 731 {
 732         FILE *tmpfp;
 733         const gchar *src_codeset;
 734         gboolean conv_fail = FALSE;
 735         gchar buf[BUFFSIZE];
 736         gchar *str;
 737         gboolean scan_ret = FALSE;
 738         int r;
 739
 740         cm_return_val_if_fail(mimeinfo != NULL, TRUE);
 741         cm_return_val_if_fail(scan_callback != NULL, TRUE);
 742
 743         if (!procmime_decode_content(mimeinfo))
 744                 return TRUE;
 745
 746         tmpfp = my_tmpfile();
 747
 748         if (tmpfp == NULL) {
 749                 FILE_OP_ERROR("tmpfile", "open");
 750                 return TRUE;
 751         }
 752
 753         if ((r = procmime_get_part_to_stream(tmpfp, mimeinfo)) < 0) {
 754                 g_warning("procmime_get_part_to_stream error %d\n", r);
 755                 return TRUE;
 756         }
 757
 758         src_codeset = forced_charset
 759                       ? forced_charset :
 760                       procmime_mimeinfo_get_parameter(mimeinfo, "charset");
 761
 762         /* use supersets transparently when possible */
 763         if (!forced_charset && src_codeset && !strcasecmp(src_codeset, CS_ISO_8859_1))
 764                 src_codeset = CS_WINDOWS_1252;
 765         else if (!forced_charset && src_codeset && !strcasecmp(src_codeset, CS_X_GBK))
 766                 src_codeset = CS_GB18030;
 767         else if (!forced_charset && src_codeset && !strcasecmp(src_codeset, CS_GBK))
 768                 src_codeset = CS_GB18030;
 769         else if (!forced_charset && src_codeset && !strcasecmp(src_codeset, CS_GB2312))
 770                 src_codeset = CS_GB18030;
 771         else if (!forced_charset && src_codeset && !strcasecmp(src_codeset, CS_X_VIET_VPS))
 772                 src_codeset = CS_WINDOWS_874;
 773
 774         if (mimeinfo->type == MIMETYPE_TEXT && !g_ascii_strcasecmp(mimeinfo->subtype, "html")) {
 775                 SC_HTMLParser *parser;
 776                 CodeConverter *conv;
 777
 778                 conv = conv_code_converter_new(src_codeset);
 779                 parser = sc_html_parser_new(tmpfp, conv);
 780                 while ((str = sc_html_parse(parser)) != NULL) {
 781                         if ((scan_ret = scan_callback(str, cb_data)) == TRUE)
 782                                 break;
 783                 }
 784                 sc_html_parser_destroy(parser);
 785                 conv_code_converter_destroy(conv);
 786         } else if (mimeinfo->type == MIMETYPE_TEXT && !g_ascii_strcasecmp(mimeinfo->subtype, "enriched")) {
 787                 ERTFParser *parser;
 788                 CodeConverter *conv;
 789
 790                 conv = conv_code_converter_new(src_codeset);
 791                 parser = ertf_parser_new(tmpfp, conv);
 792                 while ((str = ertf_parse(parser)) != NULL) {
 793                         if ((scan_ret = scan_callback(str, cb_data)) == TRUE)
 794                                 break;
 795                 }
 796                 ertf_parser_destroy(parser);
 797                 conv_code_converter_destroy(conv);
 798         } else if (mimeinfo->type == MIMETYPE_TEXT && mimeinfo->disposition != DISPOSITIONTYPE_ATTACHMENT) {
 799                 while (claws_fgets(buf, sizeof(buf), tmpfp) != NULL) {
 800                         str = conv_codeset_strdup(buf, src_codeset, CS_UTF_8);
 801                         if (str) {
 802                                 if ((scan_ret = scan_callback(str, cb_data)) == TRUE) {
 803                                         g_free(str);
 804                                         break;
 805                                 }
 806                                 g_free(str);
 807                         } else {
 808                                 conv_fail = TRUE;
 809                                 if ((scan_ret = scan_callback(buf, cb_data)) == TRUE)
 810                                         break;
 811                         }
 812                 }
 813         }
 814
 815         if (conv_fail)
 816                 g_warning("procmime_get_text_content(): Code conversion failed.");
 817
 818         claws_fclose(tmpfp);
 819
 820         return scan_ret;
 821 }
 822
 823 static gboolean scan_fputs_cb(const gchar *str, gpointer fp)
 824 {
 825         if (claws_fputs(str, (FILE *)fp) == EOF)
 826                 return TRUE;
 827
 828         return FALSE;
 829 }
 830
 831 FILE *procmime_get_text_content(MimeInfo *mimeinfo)
 832 {
 833         FILE *outfp;
 834         gboolean err;
 835
 836         if ((outfp = my_tmpfile()) == NULL) {
 837                 perror("my_tmpfile");
 838                 return NULL;
 839         }
 840
 841         err = procmime_scan_text_content(mimeinfo, scan_fputs_cb, outfp);
 842
 843         rewind(outfp);
 844         if (err == TRUE) {
 845                 claws_fclose(outfp);
 846                 return NULL;
 847         }
 848         return outfp;
 849
 850 }
 851
 852 FILE *procmime_get_binary_content(MimeInfo *mimeinfo)
 853 {
 854         FILE *outfp;
 855
 856         cm_return_val_if_fail(mimeinfo != NULL, NULL);
 857
 858         if (!procmime_decode_content(mimeinfo))
 859                 return NULL;
 860
 861         outfp = my_tmpfile();
 862
 863         if (procmime_get_part_to_stream(outfp, mimeinfo) < 0) {
 864                 return NULL;
 865         }
 866
 867         return outfp;
 868 }
 869
 870 /* search the first text part of (multipart) MIME message,
 871    decode, convert it and output to outfp. */
 872 FILE *procmime_get_first_text_content(MsgInfo *msginfo)
 873 {
 874         FILE *outfp = NULL;
 875         MimeInfo *mimeinfo, *partinfo;
 876         gboolean empty_ok = FALSE, short_scan = TRUE;
 877
 878         cm_return_val_if_fail(msginfo != NULL, NULL);
 879
 880         /* first we try to short-scan (for speed), refusing empty parts */
 881 scan_again:
 882         if (short_scan)
 883                 mimeinfo = procmime_scan_message_short(msginfo);
 884         else
 885                 mimeinfo = procmime_scan_message(msginfo);
 886         if (!mimeinfo) return NULL;
 887
 888         partinfo = mimeinfo;
 889         while (partinfo && (partinfo->type != MIMETYPE_TEXT ||
 890                (partinfo->length == 0 && !empty_ok))) {
 891                 partinfo = procmime_mimeinfo_next(partinfo);
 892         }
 893         if (partinfo)
 894                 outfp = procmime_get_text_content(partinfo);
 895         else if (!empty_ok && short_scan) {
 896                 /* if short scan didn't find a non-empty part, rescan
 897                  * fully for non-empty parts
 898                  */
 899                 short_scan = FALSE;
 900                 procmime_mimeinfo_free_all(&mimeinfo);
 901                 goto scan_again;
 902         } else if (!empty_ok && !short_scan) {
 903                 /* if full scan didn't find a non-empty part, rescan
 904                  * accepting empty parts
 905                  */
 906                 empty_ok = TRUE;
 907                 procmime_mimeinfo_free_all(&mimeinfo);
 908                 goto scan_again;
 909         }
 910         procmime_mimeinfo_free_all(&mimeinfo);
 911
 912         return outfp;
 913 }
 914
 915
 916 static gboolean find_encrypted_func(GNode *node, gpointer data)
 917 {
 918         MimeInfo *mimeinfo = (MimeInfo *) node->data;
 919         MimeInfo **encinfo = (MimeInfo **) data;
 920
 921         if (privacy_mimeinfo_is_encrypted(mimeinfo)) {
 922                 *encinfo = mimeinfo;
 923                 return TRUE;
 924         }
 925
 926         return FALSE;
 927 }
 928
 929 static MimeInfo *find_encrypted_part(MimeInfo *rootinfo)
 930 {
 931         MimeInfo *encinfo = NULL;
 932
 933         g_node_traverse(rootinfo->node, G_IN_ORDER, G_TRAVERSE_ALL, -1,
 934                 find_encrypted_func, &encinfo);
 935
 936         return encinfo;
 937 }
 938
 939 /* search the first encrypted text part of (multipart) MIME message,
 940    decode, convert it and output to outfp. */
 941 FILE *procmime_get_first_encrypted_text_content(MsgInfo *msginfo)
 942 {
 943         FILE *outfp = NULL;
 944         MimeInfo *mimeinfo, *partinfo, *encinfo;
 945
 946         cm_return_val_if_fail(msginfo != NULL, NULL);
 947
 948         mimeinfo = procmime_scan_message(msginfo);
 949         if (!mimeinfo) {
 950                 return NULL;
 951         }
 952
 953         partinfo = mimeinfo;
 954         if ((encinfo = find_encrypted_part(partinfo)) != NULL) {
 955                 debug_print("decrypting message part\n");
 956                 if (privacy_mimeinfo_decrypt(encinfo) < 0) {
 957                         alertpanel_error(_("Couldn't decrypt: %s"),
 958                                 privacy_get_error());
 959                         return NULL;
 960                 }
 961         }
 962         partinfo = mimeinfo;
 963         while (partinfo && partinfo->type != MIMETYPE_TEXT) {
 964                 partinfo = procmime_mimeinfo_next(partinfo);
 965                 if (privacy_mimeinfo_is_signed(partinfo))
 966                         procmsg_msginfo_set_flags(msginfo, 0, MSG_SIGNED);
 967         }
 968
 969         if (partinfo)
 970                 outfp = procmime_get_text_content(partinfo);
 971
 972         procmime_mimeinfo_free_all(&mimeinfo);
 973
 974         return outfp;
 975 }
 976
 977 gboolean procmime_msginfo_is_encrypted(MsgInfo *msginfo)
 978 {
 979         MimeInfo *mimeinfo, *partinfo;
 980         gboolean result = FALSE;
 981
 982         cm_return_val_if_fail(msginfo != NULL, FALSE);
 983
 984         mimeinfo = procmime_scan_message(msginfo);
 985         if (!mimeinfo) {
 986                 return FALSE;
 987         }
 988
 989         partinfo = mimeinfo;
 990         result = (find_encrypted_part(partinfo) != NULL);
 991         procmime_mimeinfo_free_all(&mimeinfo);
 992
 993         return result;
 994 }
 995
 996 gchar *procmime_get_tmp_file_name(MimeInfo *mimeinfo)
 997 {
 998         static guint32 id = 0;
 999         gchar *base;
1000         gchar *filename;
1001         gchar f_prefix[10];
1002
1003         cm_return_val_if_fail(mimeinfo != NULL, NULL);
1004
1005         g_snprintf(f_prefix, sizeof(f_prefix), "%08x.", id++);
1006
1007         if ((mimeinfo->type == MIMETYPE_TEXT) && !g_ascii_strcasecmp(mimeinfo->subtype, "html"))
1008                 base = g_strdup("mimetmp.html");
1009         else {
1010                 const gchar *basetmp;
1011
1012                 basetmp = procmime_mimeinfo_get_parameter(mimeinfo, "filename");
1013                 if (basetmp == NULL)
1014                         basetmp = procmime_mimeinfo_get_parameter(mimeinfo, "name");
1015                 if (basetmp == NULL)
1016                         basetmp = "mimetmp";
1017                 basetmp = g_path_get_basename(basetmp);
1018                 if (*basetmp == '\0')
1019                         basetmp = g_strdup("mimetmp");
1020                 base = conv_filename_from_utf8(basetmp);
1021                 g_free((gchar*)basetmp);
1022                 subst_for_shellsafe_filename(base);
1023         }
1024
1025         filename = g_strconcat(get_mime_tmp_dir(), G_DIR_SEPARATOR_S,
1026                                f_prefix, base, NULL);
1027
1028         g_free(base);
1029
1030         return filename;
1031 }
1032
1033 static GList *mime_type_list = NULL;
1034
1035 gchar *procmime_get_mime_type(const gchar *filename)
1036 {
1037         const gchar *p;
1038         gchar *ext = NULL;
1039         gchar *base;
1040 #ifndef G_OS_WIN32
1041         static GHashTable *mime_type_table = NULL;
1042         MimeType *mime_type;
1043
1044         if (!mime_type_table) {
1045                 mime_type_table = procmime_get_mime_type_table();
1046                 if (!mime_type_table) return NULL;
1047         }
1048 #endif
1049
1050         if (filename == NULL)
1051                 return NULL;
1052
1053         base = g_path_get_basename(filename);
1054         if ((p = strrchr(base, '.')) != NULL)
1055                 ext = g_utf8_strdown(p + 1, -1);
1056         else
1057                 ext = g_utf8_strdown(base, -1);
1058         g_free(base);
1059
1060 #ifndef G_OS_WIN32
1061         mime_type = g_hash_table_lookup(mime_type_table, ext);
1062
1063         if (mime_type) {
1064                 gchar *str;
1065                 str = g_strconcat(mime_type->type, "/", mime_type->sub_type,
1066                                   NULL);
1067                 debug_print("got type %s for %s\n", str, ext);
1068                 g_free(ext);
1069                 return str;
1070         }
1071         g_free(ext);
1072         return NULL;
1073 #else
1074         gchar *str = get_content_type_from_registry_with_ext(ext);
1075
1076         g_free(ext);
1077         return str;
1078 #endif
1079 }
1080
1081 static guint procmime_str_hash(gconstpointer gptr)
1082 {
1083         guint hash_result = 0;
1084         const char *str;
1085
1086         for (str = gptr; str && *str; str++) {
1087                 if (isupper(*str)) hash_result += (*str + ' ');
1088                 else hash_result += *str;
1089         }
1090
1091         return hash_result;
1092 }
1093
1094 static gint procmime_str_equal(gconstpointer gptr1, gconstpointer gptr2)
1095 {
1096         const char *str1 = gptr1;
1097         const char *str2 = gptr2;
1098
1099         return !g_utf8_collate(str1, str2);
1100 }
1101
1102 static GHashTable *procmime_get_mime_type_table(void)
1103 {
1104         GHashTable *table = NULL;
1105         GList *cur;
1106         MimeType *mime_type;
1107         gchar **exts;
1108
1109         if (!mime_type_list) {
1110                 mime_type_list = procmime_get_mime_type_list();
1111                 if (!mime_type_list) return NULL;
1112         }
1113
1114         table = g_hash_table_new(procmime_str_hash, procmime_str_equal);
1115
1116         for (cur = mime_type_list; cur != NULL; cur = cur->next) {
1117                 gint i;
1118                 gchar *key;
1119
1120                 mime_type = (MimeType *)cur->data;
1121
1122                 if (!mime_type->extension) continue;
1123
1124                 exts = g_strsplit(mime_type->extension, " ", 16);
1125                 for (i = 0; exts[i] != NULL; i++) {
1126                         /* Don't overwrite previously inserted extension */
1127                         if (!g_hash_table_lookup(table, exts[i])) {
1128                                 key = g_strdup(exts[i]);
1129                                 g_hash_table_insert(table, key, mime_type);
1130                         }
1131                 }
1132                 g_strfreev(exts);
1133         }
1134
1135         return table;
1136 }
1137
1138 GList *procmime_get_mime_type_list(void)
1139 {
1140         GList *list = NULL;
1141         FILE *fp;
1142         gchar buf[BUFFSIZE];
1143         gchar *p;
1144         gchar *delim;
1145         MimeType *mime_type;
1146         gboolean fp_is_glob_file = TRUE;
1147
1148         if (mime_type_list)
1149                 return mime_type_list;
1150
1151 #if defined(__NetBSD__) || defined(__OpenBSD__) || defined(__FreeBSD__)
1152         if ((fp = claws_fopen(DATAROOTDIR "/mime/globs", "rb")) == NULL)
1153 #else
1154         if ((fp = claws_fopen("/usr/share/mime/globs", "rb")) == NULL)
1155 #endif
1156         {
1157                 fp_is_glob_file = FALSE;
1158                 if ((fp = claws_fopen("/etc/mime.types", "rb")) == NULL) {
1159                         if ((fp = claws_fopen(SYSCONFDIR "/mime.types", "rb"))
1160                                 == NULL) {
1161                                 FILE_OP_ERROR(SYSCONFDIR "/mime.types",
1162                                         "claws_fopen");
1163                                 return NULL;
1164                         }
1165                 }
1166         }
1167
1168         while (claws_fgets(buf, sizeof(buf), fp) != NULL) {
1169                 p = strchr(buf, '#');
1170                 if (p) *p = '\0';
1171                 g_strstrip(buf);
1172
1173                 p = buf;
1174
1175                 if (fp_is_glob_file) {
1176                         while (*p && !g_ascii_isspace(*p) && (*p!=':')) p++;
1177                 } else {
1178                         while (*p && !g_ascii_isspace(*p)) p++;
1179                 }
1180
1181                 if (*p) {
1182                         *p = '\0';
1183                         p++;
1184                 }
1185                 delim = strchr(buf, '/');
1186                 if (delim == NULL) continue;
1187                 *delim = '\0';
1188
1189                 mime_type = g_new(MimeType, 1);
1190                 mime_type->type = g_strdup(buf);
1191                 mime_type->sub_type = g_strdup(delim + 1);
1192
1193                 if (fp_is_glob_file) {
1194                         while (*p && (g_ascii_isspace(*p)||(*p=='*')||(*p=='.'))) p++;
1195                 } else {
1196                         while (*p && g_ascii_isspace(*p)) p++;
1197                 }
1198
1199                 if (*p)
1200                         mime_type->extension = g_utf8_strdown(p, -1);
1201                 else
1202                         mime_type->extension = NULL;
1203
1204                 list = g_list_append(list, mime_type);
1205         }
1206
1207         claws_fclose(fp);
1208
1209         if (!list)
1210                 g_warning("Can't read mime.types");
1211
1212         return list;
1213 }
1214
1215 EncodingType procmime_get_encoding_for_charset(const gchar *charset)
1216 {
1217         if (!charset)
1218                 return ENC_8BIT;
1219         else if (!g_ascii_strncasecmp(charset, "ISO-2022-", 9) ||
1220                  !g_ascii_strcasecmp(charset, "US-ASCII"))
1221                 return ENC_7BIT;
1222         else if (!g_ascii_strcasecmp(charset, "ISO-8859-5") ||
1223                  !g_ascii_strncasecmp(charset, "KOI8-", 5) ||
1224                  !g_ascii_strcasecmp(charset, "X-MAC-CYRILLIC") ||
1225                  !g_ascii_strcasecmp(charset, "MAC-CYRILLIC") ||
1226                  !g_ascii_strcasecmp(charset, "Windows-1251"))
1227                 return ENC_8BIT;
1228         else if (!g_ascii_strncasecmp(charset, "ISO-8859-", 9))
1229                 return ENC_QUOTED_PRINTABLE;
1230         else if (!g_ascii_strncasecmp(charset, "UTF-8", 5))
1231                 return ENC_QUOTED_PRINTABLE;
1232         else
1233                 return ENC_8BIT;
1234 }
1235
1236 EncodingType procmime_get_encoding_for_text_file(const gchar *file, gboolean *has_binary)
1237 {
1238         FILE *fp;
1239         guchar buf[BUFFSIZE];
1240         size_t len;
1241         size_t octet_chars = 0;
1242         size_t total_len = 0;
1243         gfloat octet_percentage;
1244         gboolean force_b64 = FALSE;
1245
1246         if ((fp = claws_fopen(file, "rb")) == NULL) {
1247                 FILE_OP_ERROR(file, "claws_fopen");
1248                 return ENC_UNKNOWN;
1249         }
1250
1251         while ((len = claws_fread(buf, sizeof(guchar), sizeof(buf), fp)) > 0) {
1252                 guchar *p;
1253                 gint i;
1254
1255                 for (p = buf, i = 0; i < len; ++p, ++i) {
1256                         if (*p & 0x80)
1257                                 ++octet_chars;
1258                         if (*p == '\0') {
1259                                 force_b64 = TRUE;
1260                                 *has_binary = TRUE;
1261                         }
1262                 }
1263                 total_len += len;
1264         }
1265
1266         claws_fclose(fp);
1267
1268         if (total_len > 0)
1269                 octet_percentage = (gfloat)octet_chars / (gfloat)total_len;
1270         else
1271                 octet_percentage = 0.0;
1272
1273         debug_print("procmime_get_encoding_for_text_file(): "
1274                     "8bit chars: %"G_GSIZE_FORMAT" / %"G_GSIZE_FORMAT" (%f%%)\n", octet_chars, total_len,
1275                     100.0 * octet_percentage);
1276
1277         if (octet_percentage > 0.20 || force_b64) {
1278                 debug_print("using BASE64\n");
1279                 return ENC_BASE64;
1280         } else if (octet_chars > 0) {
1281                 debug_print("using quoted-printable\n");
1282                 return ENC_QUOTED_PRINTABLE;
1283         } else {
1284                 debug_print("using 7bit\n");
1285                 return ENC_7BIT;
1286         }
1287 }
1288
1289 struct EncodingTable
1290 {
1291         gchar *str;
1292         EncodingType enc_type;
1293 };
1294
1295 struct EncodingTable encoding_table[] = {
1296         {"7bit", ENC_7BIT},
1297         {"8bit", ENC_8BIT},
1298         {"binary", ENC_BINARY},
1299         {"quoted-printable", ENC_QUOTED_PRINTABLE},
1300         {"base64", ENC_BASE64},
1301         {"x-uuencode", ENC_UNKNOWN},
1302         {NULL, ENC_UNKNOWN},
1303 };
1304
1305 const gchar *procmime_get_encoding_str(EncodingType encoding)
1306 {
1307         struct EncodingTable *enc_table;
1308
1309         for (enc_table = encoding_table; enc_table->str != NULL; enc_table++) {
1310                 if (enc_table->enc_type == encoding)
1311                         return enc_table->str;
1312         }
1313         return NULL;
1314 }
1315
1316 /* --- NEW MIME STUFF --- */
1317 struct TypeTable
1318 {
1319         gchar *str;
1320         MimeMediaType type;
1321 };
1322
1323 static struct TypeTable mime_type_table[] = {
1324         {"text", MIMETYPE_TEXT},
1325         {"image", MIMETYPE_IMAGE},
1326         {"audio", MIMETYPE_AUDIO},
1327         {"video", MIMETYPE_VIDEO},
1328         {"model", MIMETYPE_MODEL},
1329         {"application", MIMETYPE_APPLICATION},
1330         {"message", MIMETYPE_MESSAGE},
1331         {"multipart", MIMETYPE_MULTIPART},
1332         {NULL, 0},
1333 };
1334
1335 const gchar *procmime_get_media_type_str(MimeMediaType type)
1336 {
1337         struct TypeTable *type_table;
1338
1339         for (type_table = mime_type_table; type_table->str != NULL; type_table++) {
1340                 if (type_table->type == type)
1341                         return type_table->str;
1342         }
1343         return NULL;
1344 }
1345
1346 MimeMediaType procmime_get_media_type(const gchar *str)
1347 {
1348         struct TypeTable *typetablearray;
1349
1350         for (typetablearray = mime_type_table; typetablearray->str != NULL; typetablearray++)
1351                 if (g_ascii_strncasecmp(str, typetablearray->str, strlen(typetablearray->str)) == 0)
1352                         return typetablearray->type;
1353
1354         return MIMETYPE_UNKNOWN;
1355 }
1356
1357 /*!
1358  *\brief        Safe wrapper for content type string.
1359  *
1360  *\return       const gchar * Pointer to content type string.
1361  */
1362 gchar *procmime_get_content_type_str(MimeMediaType type,
1363                                            const char *subtype)
1364 {
1365         const gchar *type_str = NULL;
1366
1367         if (subtype == NULL || !(type_str = procmime_get_media_type_str(type)))
1368                 return g_strdup("unknown");
1369         return g_strdup_printf("%s/%s", type_str, subtype);
1370 }
1371
1372 static int procmime_parse_mimepart(MimeInfo *parent,
1373                              gchar *content_type,
1374                              gchar *content_encoding,
1375                              gchar *content_description,
1376                              gchar *content_id,
1377                              gchar *content_disposition,
1378                              gchar *content_location,
1379                              const gchar *original_msgid,
1380                              const gchar *disposition_notification_hdr,
1381                              const gchar *filename,
1382                              guint offset,
1383                              guint length,
1384                              gboolean short_scan);
1385
1386 static void procmime_parse_message_rfc822(MimeInfo *mimeinfo, gboolean short_scan)
1387 {
1388         HeaderEntry hentry[] = {{"Content-Type:",  NULL, TRUE},
1389                                 {"Content-Transfer-Encoding:",
1390                                                    NULL, FALSE},
1391                                 {"Content-Description:",
1392                                                    NULL, TRUE},
1393                                 {"Content-ID:",
1394                                                    NULL, TRUE},
1395                                 {"Content-Disposition:",
1396                                                    NULL, TRUE},
1397                                 {"Content-Location:",
1398                                                    NULL, TRUE},
1399                                 {"MIME-Version:",
1400                                                    NULL, TRUE},
1401                                 {"Original-Message-ID:",
1402                                                    NULL, TRUE},
1403                                 {"Disposition:",
1404                                                    NULL, TRUE},
1405                                 {NULL,             NULL, FALSE}};
1406         guint content_start, i;
1407         FILE *fp;
1408         gchar *tmp;
1409         gint len = 0;
1410
1411         procmime_decode_content(mimeinfo);
1412
1413         fp = claws_fopen(mimeinfo->data.filename, "rb");
1414         if (fp == NULL) {
1415                 FILE_OP_ERROR(mimeinfo->data.filename, "claws_fopen");
1416                 return;
1417         }
1418         if (fseek(fp, mimeinfo->offset, SEEK_SET) < 0) {
1419                 FILE_OP_ERROR(mimeinfo->data.filename, "fseek");
1420                 claws_fclose(fp);
1421                 return;
1422         }
1423         procheader_get_header_fields(fp, hentry);
1424         if (hentry[0].body != NULL) {
1425                 tmp = conv_unmime_header(hentry[0].body, NULL, FALSE);
1426                 g_free(hentry[0].body);
1427                 hentry[0].body = tmp;
1428         }
1429         if (hentry[2].body != NULL) {
1430                 tmp = conv_unmime_header(hentry[2].body, NULL, FALSE);
1431                 g_free(hentry[2].body);
1432                 hentry[2].body = tmp;
1433         }
1434         if (hentry[4].body != NULL) {
1435                 tmp = conv_unmime_header(hentry[4].body, NULL, FALSE);
1436                 g_free(hentry[4].body);
1437                 hentry[4].body = tmp;
1438         }
1439         if (hentry[5].body != NULL) {
1440                 tmp = conv_unmime_header(hentry[5].body, NULL, FALSE);
1441                 g_free(hentry[5].body);
1442                 hentry[5].body = tmp;
1443         }
1444         if (hentry[7].body != NULL) {
1445                 tmp = conv_unmime_header(hentry[7].body, NULL, FALSE);
1446                 g_free(hentry[7].body);
1447                 hentry[7].body = tmp;
1448         }
1449         if (hentry[8].body != NULL) {
1450                 tmp = conv_unmime_header(hentry[8].body, NULL, FALSE);
1451                 g_free(hentry[8].body);
1452                 hentry[8].body = tmp;
1453         }
1454
1455         content_start = ftell(fp);
1456         claws_fclose(fp);
1457
1458         len = mimeinfo->length - (content_start - mimeinfo->offset);
1459         if (len < 0)
1460                 len = 0;
1461         procmime_parse_mimepart(mimeinfo,
1462                                 hentry[0].body, hentry[1].body,
1463                                 hentry[2].body, hentry[3].body,
1464                                 hentry[4].body, hentry[5].body,
1465                                 hentry[7].body, hentry[8].body,
1466                                 mimeinfo->data.filename, content_start,
1467                                 len, short_scan);
1468
1469         for (i = 0; i < (sizeof hentry / sizeof hentry[0]); i++) {
1470                 g_free(hentry[i].body);
1471                 hentry[i].body = NULL;
1472         }
1473 }
1474
1475 static void procmime_parse_disposition_notification(MimeInfo *mimeinfo,
1476                 const gchar *original_msgid, const gchar *disposition_notification_hdr,
1477                 gboolean short_scan)
1478 {
1479         HeaderEntry hentry[] = {{"Original-Message-ID:",  NULL, TRUE},
1480                                 {"Disposition:",          NULL, TRUE},
1481                                 {NULL,                    NULL, FALSE}};
1482         guint i;
1483         FILE *fp;
1484         gchar *orig_msg_id = NULL;
1485         gchar *disp = NULL;
1486
1487         procmime_decode_content(mimeinfo);
1488
1489         debug_print("parse disposition notification\n");
1490         fp = claws_fopen(mimeinfo->data.filename, "rb");
1491         if (fp == NULL) {
1492                 FILE_OP_ERROR(mimeinfo->data.filename, "claws_fopen");
1493                 return;
1494         }
1495         if (fseek(fp, mimeinfo->offset, SEEK_SET) < 0) {
1496                 FILE_OP_ERROR(mimeinfo->data.filename, "fseek");
1497                 claws_fclose(fp);
1498                 return;
1499         }
1500
1501         if (original_msgid && disposition_notification_hdr) {
1502                 hentry[0].body = g_strdup(original_msgid);
1503                 hentry[1].body = g_strdup(disposition_notification_hdr);
1504         } else {
1505                 procheader_get_header_fields(fp, hentry);
1506         }
1507
1508         claws_fclose(fp);
1509
1510         if (!hentry[0].body || !hentry[1].body) {
1511                 debug_print("MsgId %s, Disp %s\n",
1512                         hentry[0].body ? hentry[0].body:"(nil)",
1513                         hentry[1].body ? hentry[1].body:"(nil)");
1514                 goto bail;
1515         }
1516
1517         orig_msg_id = g_strdup(hentry[0].body);
1518         disp = g_strdup(hentry[1].body);
1519
1520         extract_parenthesis(orig_msg_id, '<', '>');
1521         remove_space(orig_msg_id);
1522
1523         if (strstr(disp, "displayed")) {
1524                 /* find sent message, if possible */
1525                 MsgInfo *info = NULL;
1526                 GList *flist;
1527                 debug_print("%s has been displayed.\n", orig_msg_id);
1528                 for (flist = folder_get_list(); flist != NULL; flist = g_list_next(flist)) {
1529                         FolderItem *outbox = ((Folder *)(flist->data))->outbox;
1530                         if (!outbox) {
1531                                 debug_print("skipping folder with no outbox...\n");
1532                                 continue;
1533                         }
1534                         info = folder_item_get_msginfo_by_msgid(outbox, orig_msg_id);
1535                         debug_print("%s %s in %s\n", info?"found":"didn't find", orig_msg_id, outbox->path);
1536                         if (info) {
1537                                 procmsg_msginfo_set_flags(info, MSG_RETRCPT_GOT, 0);
1538                                 procmsg_msginfo_free(&info);
1539                         }
1540                 }
1541         }
1542         g_free(orig_msg_id);
1543         g_free(disp);
1544 bail:
1545         for (i = 0; i < (sizeof hentry / sizeof hentry[0]); i++) {
1546                 g_free(hentry[i].body);
1547                 hentry[i].body = NULL;
1548         }
1549 }
1550
1551 #define GET_HEADERS() {                                         \
1552         procheader_get_header_fields(fp, hentry);               \
1553         if (hentry[0].body != NULL) {                           \
1554                 tmp = conv_unmime_header(hentry[0].body, NULL, FALSE);  \
1555                 g_free(hentry[0].body);                         \
1556                 hentry[0].body = tmp;                           \
1557         }                                                       \
1558         if (hentry[2].body != NULL) {                           \
1559                 tmp = conv_unmime_header(hentry[2].body, NULL, FALSE);  \
1560                 g_free(hentry[2].body);                         \
1561                 hentry[2].body = tmp;                           \
1562         }                                                       \
1563         if (hentry[4].body != NULL) {                           \
1564                 tmp = conv_unmime_header(hentry[4].body, NULL, FALSE);  \
1565                 g_free(hentry[4].body);                         \
1566                 hentry[4].body = tmp;                           \
1567         }                                                       \
1568         if (hentry[5].body != NULL) {                           \
1569                 tmp = conv_unmime_header(hentry[5].body, NULL, FALSE);  \
1570                 g_free(hentry[5].body);                         \
1571                 hentry[5].body = tmp;                           \
1572         }                                                       \
1573         if (hentry[6].body != NULL) {                           \
1574                 tmp = conv_unmime_header(hentry[6].body, NULL, FALSE);  \
1575                 g_free(hentry[6].body);                         \
1576                 hentry[6].body = tmp;                           \
1577         }                                                       \
1578         if (hentry[7].body != NULL) {                           \
1579                 tmp = conv_unmime_header(hentry[7].body, NULL, FALSE);  \
1580                 g_free(hentry[7].body);                         \
1581                 hentry[7].body = tmp;                           \
1582         }                                                       \
1583 }
1584
1585 static void procmime_parse_multipart(MimeInfo *mimeinfo, gboolean short_scan)
1586 {
1587         HeaderEntry hentry[] = {{"Content-Type:",  NULL, TRUE},
1588                                 {"Content-Transfer-Encoding:",
1589                                                    NULL, FALSE},
1590                                 {"Content-Description:",
1591                                                    NULL, TRUE},
1592                                 {"Content-ID:",
1593                                                    NULL, TRUE},
1594                                 {"Content-Disposition:",
1595                                                    NULL, TRUE},
1596                                 {"Content-Location:",
1597                                                    NULL, TRUE},
1598                                 {"Original-Message-ID:",
1599                                                    NULL, TRUE},
1600                                 {"Disposition:",
1601                                                    NULL, TRUE},
1602                                 {NULL,             NULL, FALSE}};
1603         gchar *tmp;
1604         gchar *boundary;
1605         gint boundary_len = 0, lastoffset = -1, i;
1606         gchar buf[BUFFSIZE];
1607         FILE *fp;
1608         int result = 0;
1609         gboolean start_found = FALSE;
1610         gboolean end_found = FALSE;
1611
1612         boundary = g_hash_table_lookup(mimeinfo->typeparameters, "boundary");
1613         if (!boundary)
1614                 return;
1615         boundary_len = strlen(boundary);
1616
1617         procmime_decode_content(mimeinfo);
1618
1619         fp = claws_fopen(mimeinfo->data.filename, "rb");
1620         if (fp == NULL) {
1621                 FILE_OP_ERROR(mimeinfo->data.filename, "claws_fopen");
1622                 return;
1623         }
1624
1625         if (fseek(fp, mimeinfo->offset, SEEK_SET) < 0) {
1626                 FILE_OP_ERROR(mimeinfo->data.filename, "fseek");
1627                 claws_fclose(fp);
1628                 return;
1629         }
1630
1631         while (claws_fgets(buf, sizeof(buf), fp) != NULL && result == 0) {
1632                 if (ftell(fp) - 1 > (mimeinfo->offset + mimeinfo->length))
1633                         break;
1634
1635                 if (IS_BOUNDARY(buf, boundary, boundary_len)) {
1636                         start_found = TRUE;
1637
1638                         if (lastoffset != -1) {
1639                                 gint len = (ftell(fp) - strlen(buf)) - lastoffset - 1;
1640                                 if (len < 0)
1641                                         len = 0;
1642                                 result = procmime_parse_mimepart(mimeinfo,
1643                                                         hentry[0].body, hentry[1].body,
1644                                                         hentry[2].body, hentry[3].body,
1645                                                         hentry[4].body, hentry[5].body,
1646                                                         hentry[6].body, hentry[7].body,
1647                                                         mimeinfo->data.filename, lastoffset,
1648                                                         len, short_scan);
1649                                 if (result == 1 && short_scan)
1650                                         break;
1651
1652                         }
1653
1654                         if (buf[2 + boundary_len]     == '-' &&
1655                             buf[2 + boundary_len + 1] == '-') {
1656                                 end_found = TRUE;
1657                                 break;
1658                         }
1659                         for (i = 0; i < (sizeof hentry / sizeof hentry[0]) ; i++) {
1660                                 g_free(hentry[i].body);
1661                                 hentry[i].body = NULL;
1662                         }
1663                         GET_HEADERS();
1664                         lastoffset = ftell(fp);
1665                 }
1666         }
1667
1668         if (start_found && !end_found && lastoffset != -1) {
1669                 gint len = (ftell(fp) - strlen(buf)) - lastoffset - 1;
1670
1671                 if (len >= 0) {
1672                         result = procmime_parse_mimepart(mimeinfo,
1673                                         hentry[0].body, hentry[1].body,
1674                                         hentry[2].body, hentry[3].body,
1675                                         hentry[4].body, hentry[5].body,
1676                                         hentry[6].body, hentry[7].body,
1677                                         mimeinfo->data.filename, lastoffset,
1678                                         len, short_scan);
1679                 }
1680                 mimeinfo->broken = TRUE;
1681         }
1682
1683         for (i = 0; i < (sizeof hentry / sizeof hentry[0]); i++) {
1684                 g_free(hentry[i].body);
1685                 hentry[i].body = NULL;
1686         }
1687         claws_fclose(fp);
1688 }
1689
1690 static void parse_parameters(const gchar *parameters, GHashTable *table)
1691 {
1692         gchar *params, *param, *next;
1693         GSList *convlist = NULL, *concatlist = NULL, *cur;
1694
1695         params = g_strdup(parameters);
1696         param = params;
1697         next = params;
1698         for (; next != NULL; param = next) {
1699                 gchar *attribute, *value, *tmp, *down_attr, *orig_down_attr;
1700                 gint len;
1701                 gboolean convert = FALSE;
1702
1703                 next = strchr_with_skip_quote(param, '"', ';');
1704                 if (next != NULL) {
1705                         next[0] = '\0';
1706                         next++;
1707                 }
1708
1709                 g_strstrip(param);
1710
1711                 attribute = param;
1712                 value = strchr(attribute, '=');
1713                 if (value == NULL)
1714                         continue;
1715
1716                 value[0] = '\0';
1717                 value++;
1718                 while (value[0] != '\0' && value[0] == ' ')
1719                         value++;
1720
1721                 down_attr = g_utf8_strdown(attribute, -1);
1722                 orig_down_attr = down_attr;
1723
1724                 len = down_attr ? strlen(down_attr):0;
1725                 if (len > 0 && down_attr[len - 1] == '*') {
1726                         gchar *srcpos, *dstpos, *endpos;
1727
1728                         convert = TRUE;
1729                         down_attr[len - 1] = '\0';
1730
1731                         srcpos = value;
1732                         dstpos = value;
1733                         endpos = value + strlen(value);
1734                         while (srcpos < endpos) {
1735                                 if (*srcpos != '%')
1736                                         *dstpos = *srcpos;
1737                                 else {
1738                                         guchar dstvalue;
1739
1740                                         if (!get_hex_value(&dstvalue, srcpos[1], srcpos[2]))
1741                                                 *dstpos = '?';
1742                                         else
1743                                                 *dstpos = dstvalue;
1744                                         srcpos += 2;
1745                                 }
1746                                 srcpos++;
1747                                 dstpos++;
1748                         }
1749                         *dstpos = '\0';
1750                         if (value[0] == '"')
1751                                 extract_quote(value, '"');
1752                 } else {
1753                         if (value[0] == '"')
1754                                 extract_quote(value, '"');
1755                         else if ((tmp = strchr(value, ' ')) != NULL)
1756                                 *tmp = '\0';
1757                 }
1758
1759                 if (down_attr) {
1760                         while (down_attr[0] == ' ')
1761                                 down_attr++;
1762                         while (down_attr[strlen(down_attr)-1] == ' ')
1763                                 down_attr[strlen(down_attr)-1] = '\0';
1764                 }
1765
1766                 while (value[0] != '\0' && value[0] == ' ')
1767                         value++;
1768                 while (value[strlen(value)-1] == ' ')
1769                         value[strlen(value)-1] = '\0';
1770
1771                 if (down_attr && strrchr(down_attr, '*') != NULL) {
1772                         gchar *tmpattr;
1773
1774                         tmpattr = g_strdup(down_attr);
1775                         tmp = strrchr(tmpattr, '*');
1776                         tmp[0] = '\0';
1777
1778                         if ((tmp[1] == '0') && (tmp[2] == '\0') &&
1779                             (g_slist_find_custom(concatlist, down_attr, (GCompareFunc)g_strcmp0) == NULL))
1780                                 concatlist = g_slist_prepend(concatlist, g_strdup(tmpattr));
1781
1782                         if (convert && (g_slist_find_custom(convlist, tmpattr, (GCompareFunc)g_strcmp0) == NULL))
1783                                 convlist = g_slist_prepend(convlist, g_strdup(tmpattr));
1784
1785                         g_free(tmpattr);
1786                 } else if (convert) {
1787                         if (g_slist_find_custom(convlist, down_attr, (GCompareFunc)g_strcmp0) == NULL)
1788                                 convlist = g_slist_prepend(convlist, g_strdup(down_attr));
1789                 }
1790
1791                 if (g_hash_table_lookup(table, down_attr) == NULL)
1792                         g_hash_table_insert(table, g_strdup(down_attr), g_strdup(value));
1793                 g_free(orig_down_attr);
1794         }
1795
1796         for (cur = concatlist; cur != NULL; cur = g_slist_next(cur)) {
1797                 gchar *attribute, *attrwnum, *partvalue;
1798                 gint n = 0;
1799                 GString *value;
1800
1801                 attribute = (gchar *) cur->data;
1802                 value = g_string_sized_new(64);
1803
1804                 attrwnum = g_strdup_printf("%s*%d", attribute, n);
1805                 while ((partvalue = g_hash_table_lookup(table, attrwnum)) != NULL) {
1806                         g_string_append(value, partvalue);
1807
1808                         g_hash_table_remove(table, attrwnum);
1809                         g_free(attrwnum);
1810                         n++;
1811                         attrwnum = g_strdup_printf("%s*%d", attribute, n);
1812                 }
1813                 g_free(attrwnum);
1814
1815                 g_hash_table_insert(table, g_strdup(attribute), g_strdup(value->str));
1816                 g_string_free(value, TRUE);
1817         }
1818         slist_free_strings_full(concatlist);
1819
1820         for (cur = convlist; cur != NULL; cur = g_slist_next(cur)) {
1821                 gchar *attribute, *key, *value;
1822                 gchar *charset, *lang, *oldvalue, *newvalue;
1823
1824                 attribute = (gchar *) cur->data;
1825                 if (!g_hash_table_lookup_extended(
1826                         table, attribute, (gpointer *)(gchar *) &key, (gpointer *)(gchar *) &value))
1827                         continue;
1828
1829                 charset = value;
1830                 if (charset == NULL)
1831                         continue;
1832                 lang = strchr(charset, '\'');
1833                 if (lang == NULL)
1834                         continue;
1835                 lang[0] = '\0';
1836                 lang++;
1837                 oldvalue = strchr(lang, '\'');
1838                 if (oldvalue == NULL)
1839                         continue;
1840                 oldvalue[0] = '\0';
1841                 oldvalue++;
1842
1843                 newvalue = conv_codeset_strdup(oldvalue, charset, CS_UTF_8);
1844
1845                 g_hash_table_remove(table, attribute);
1846                 g_free(key);
1847                 g_free(value);
1848
1849                 g_hash_table_insert(table, g_strdup(attribute), newvalue);
1850         }
1851         slist_free_strings_full(convlist);
1852
1853         g_free(params);
1854 }
1855
1856 static void procmime_parse_content_type(const gchar *content_type, MimeInfo *mimeinfo)
1857 {
1858         cm_return_if_fail(content_type != NULL);
1859         cm_return_if_fail(mimeinfo != NULL);
1860
1861         /* RFC 2045, page 13 says that the mime subtype is MANDATORY;
1862          * if it's not available we use the default Content-Type */
1863         if ((content_type[0] == '\0') || (strchr(content_type, '/') == NULL)) {
1864                 mimeinfo->type = MIMETYPE_TEXT;
1865                 mimeinfo->subtype = g_strdup("plain");
1866                 if (g_hash_table_lookup(mimeinfo->typeparameters,
1867                                        "charset") == NULL) {
1868                         g_hash_table_insert(mimeinfo->typeparameters,
1869                                     g_strdup("charset"),
1870                                     g_strdup(
1871                                         conv_get_locale_charset_str_no_utf8()));
1872                 }
1873         } else {
1874                 gchar *type, *subtype, *params;
1875
1876                 type = g_strdup(content_type);
1877                 subtype = strchr(type, '/') + 1;
1878                 *(subtype - 1) = '\0';
1879                 if ((params = strchr(subtype, ';')) != NULL) {
1880                         params[0] = '\0';
1881                         params++;
1882                 }
1883
1884                 mimeinfo->type = procmime_get_media_type(type);
1885                 mimeinfo->subtype = g_strstrip(g_strdup(subtype));
1886
1887                 /* Get mimeinfo->typeparameters */
1888                 if (params != NULL)
1889                         parse_parameters(params, mimeinfo->typeparameters);
1890
1891                 g_free(type);
1892         }
1893 }
1894
1895 static void procmime_parse_content_disposition(const gchar *content_disposition, MimeInfo *mimeinfo)
1896 {
1897         gchar *tmp, *params;
1898
1899         cm_return_if_fail(content_disposition != NULL);
1900         cm_return_if_fail(mimeinfo != NULL);
1901
1902         tmp = g_strdup(content_disposition);
1903         if ((params = strchr(tmp, ';')) != NULL) {
1904                 params[0] = '\0';
1905                 params++;
1906         }
1907         g_strstrip(tmp);
1908
1909         if (!g_ascii_strcasecmp(tmp, "inline"))
1910                 mimeinfo->disposition = DISPOSITIONTYPE_INLINE;
1911         else if (!g_ascii_strcasecmp(tmp, "attachment"))
1912                 mimeinfo->disposition = DISPOSITIONTYPE_ATTACHMENT;
1913         else
1914                 mimeinfo->disposition = DISPOSITIONTYPE_ATTACHMENT;
1915
1916         if (params != NULL)
1917                 parse_parameters(params, mimeinfo->dispositionparameters);
1918
1919         g_free(tmp);
1920 }
1921
1922
1923 static void procmime_parse_content_encoding(const gchar *content_encoding, MimeInfo *mimeinfo)
1924 {
1925         struct EncodingTable *enc_table;
1926
1927         for (enc_table = encoding_table; enc_table->str != NULL; enc_table++) {
1928                 if (g_ascii_strcasecmp(enc_table->str, content_encoding) == 0) {
1929                         mimeinfo->encoding_type = enc_table->enc_type;
1930                         return;
1931                 }
1932         }
1933         mimeinfo->encoding_type = ENC_UNKNOWN;
1934         return;
1935 }
1936
1937 static GSList *registered_parsers = NULL;
1938
1939 static MimeParser *procmime_get_mimeparser_for_type(MimeMediaType type, const gchar *sub_type)
1940 {
1941         GSList *cur;
1942         for (cur = registered_parsers; cur; cur = cur->next) {
1943                 MimeParser *parser = (MimeParser *)cur->data;
1944                 if (parser->type == type && !g_strcmp0(parser->sub_type, sub_type))
1945                         return parser;
1946         }
1947         return NULL;
1948 }
1949
1950 void procmime_mimeparser_register(MimeParser *parser)
1951 {
1952         if (!procmime_get_mimeparser_for_type(parser->type, parser->sub_type))
1953                 registered_parsers = g_slist_append(registered_parsers, parser);
1954 }
1955
1956
1957 void procmime_mimeparser_unregister(MimeParser *parser)
1958 {
1959         registered_parsers = g_slist_remove(registered_parsers, parser);
1960 }
1961
1962 static gboolean procmime_mimeparser_parse(MimeParser *parser, MimeInfo *mimeinfo)
1963 {
1964         cm_return_val_if_fail(parser->parse != NULL, FALSE);
1965         return parser->parse(parser, mimeinfo);
1966 }
1967
1968 static int procmime_parse_mimepart(MimeInfo *parent,
1969                              gchar *content_type,
1970                              gchar *content_encoding,
1971                              gchar *content_description,
1972                              gchar *content_id,
1973                              gchar *content_disposition,
1974                              gchar *content_location,
1975                              const gchar *original_msgid,
1976                              const gchar *disposition_notification_hdr,
1977                              const gchar *filename,
1978                              guint offset,
1979                              guint length,
1980                              gboolean short_scan)
1981 {
1982         MimeInfo *mimeinfo;
1983         MimeParser *parser = NULL;
1984         gboolean parsed = FALSE;
1985         int result = 0;
1986
1987         /* Create MimeInfo */
1988         mimeinfo = procmime_mimeinfo_new();
1989         mimeinfo->content = MIMECONTENT_FILE;
1990
1991         if (parent != NULL) {
1992                 if (g_node_depth(parent->node) > 32) {
1993                         /* 32 is an arbitrary value
1994                          * this avoids DOSsing ourselves
1995                          * with enormous messages
1996                          */
1997                         procmime_mimeinfo_free_all(&mimeinfo);
1998                         return -1;
1999                 }
2000                 g_node_append(parent->node, mimeinfo->node);
2001         }
2002         mimeinfo->data.filename = g_strdup(filename);
2003         mimeinfo->offset = offset;
2004         mimeinfo->length = length;
2005
2006         if (content_type != NULL) {
2007                 g_strchomp(content_type);
2008                 procmime_parse_content_type(content_type, mimeinfo);
2009         } else {
2010                 mimeinfo->type = MIMETYPE_TEXT;
2011                 mimeinfo->subtype = g_strdup("plain");
2012                 if (g_hash_table_lookup(mimeinfo->typeparameters,
2013                                        "charset") == NULL) {
2014                         g_hash_table_insert(mimeinfo->typeparameters,
2015                                     g_strdup("charset"),
2016                                     g_strdup(
2017                                         conv_get_locale_charset_str_no_utf8()));
2018                 }
2019         }
2020
2021         if (content_encoding != NULL) {
2022                 g_strchomp(content_encoding);
2023                 procmime_parse_content_encoding(content_encoding, mimeinfo);
2024         } else {
2025                 mimeinfo->encoding_type = ENC_UNKNOWN;
2026         }
2027
2028         if (content_description != NULL)
2029                 mimeinfo->description = g_strdup(content_description);
2030         else
2031                 mimeinfo->description = NULL;
2032
2033         if (content_id != NULL)
2034                 mimeinfo->id = g_strdup(content_id);
2035         else
2036                 mimeinfo->id = NULL;
2037
2038         if (content_location != NULL)
2039                 mimeinfo->location = g_strdup(content_location);
2040         else
2041                 mimeinfo->location = NULL;
2042
2043         if (content_disposition != NULL) {
2044                 g_strchomp(content_disposition);
2045                 procmime_parse_content_disposition(content_disposition, mimeinfo);
2046         } else
2047                 mimeinfo->disposition = DISPOSITIONTYPE_UNKNOWN;
2048
2049         /* Call parser for mime type */
2050         if ((parser = procmime_get_mimeparser_for_type(mimeinfo->type, mimeinfo->subtype)) != NULL) {
2051                 parsed = procmime_mimeparser_parse(parser, mimeinfo);
2052         }
2053         if (!parsed) {
2054                 switch (mimeinfo->type) {
2055                 case MIMETYPE_TEXT:
2056                         if (g_ascii_strcasecmp(mimeinfo->subtype, "plain") == 0 && short_scan) {
2057                                 return 1;
2058                         }
2059                         break;
2060
2061                 case MIMETYPE_MESSAGE:
2062                         if (g_ascii_strcasecmp(mimeinfo->subtype, "rfc822") == 0) {
2063                                 procmime_parse_message_rfc822(mimeinfo, short_scan);
2064                         }
2065                         if (g_ascii_strcasecmp(mimeinfo->subtype, "disposition-notification") == 0) {
2066                                 procmime_parse_disposition_notification(mimeinfo,
2067                                         original_msgid, disposition_notification_hdr, short_scan);
2068                         }
2069                         break;
2070
2071                 case MIMETYPE_MULTIPART:
2072                         procmime_parse_multipart(mimeinfo, short_scan);
2073                         break;
2074
2075                 case MIMETYPE_APPLICATION:
2076                         if (g_ascii_strcasecmp(mimeinfo->subtype, "octet-stream") == 0
2077                         && original_msgid && *original_msgid
2078                         && disposition_notification_hdr && *disposition_notification_hdr) {
2079                                 procmime_parse_disposition_notification(mimeinfo,
2080                                         original_msgid, disposition_notification_hdr, short_scan);
2081                         }
2082                         break;
2083                 default:
2084                         break;
2085                 }
2086         }
2087
2088         return result;
2089 }
2090
2091 static gchar *typenames[] = {
2092     "text",
2093     "image",
2094     "audio",
2095     "video",
2096     "application",
2097     "message",
2098     "multipart",
2099     "unknown",
2100 };
2101
2102 static gboolean output_func(GNode *node, gpointer data)
2103 {
2104         guint i, depth;
2105         MimeInfo *mimeinfo = (MimeInfo *) node->data;
2106
2107         depth = g_node_depth(node);
2108         for (i = 0; i < depth; i++)
2109                 g_print("    ");
2110         g_print("%s/%s (offset:%d length:%d encoding: %d)\n",
2111                 (mimeinfo->type < 8)? typenames[mimeinfo->type] : "unknown",
2112                 mimeinfo->subtype, mimeinfo->offset, mimeinfo->length, mimeinfo->encoding_type);
2113
2114         return FALSE;
2115 }
2116
2117 static void output_mime_structure(MimeInfo *mimeinfo, int indent)
2118 {
2119         g_node_traverse(mimeinfo->node, G_PRE_ORDER, G_TRAVERSE_ALL, -1, output_func, NULL);
2120 }
2121
2122 static MimeInfo *procmime_scan_file_with_offset(const gchar *filename, int offset, gboolean short_scan)
2123 {
2124         MimeInfo *mimeinfo;
2125         GStatBuf buf;
2126
2127         if (g_stat(filename, &buf) < 0) {
2128                 FILE_OP_ERROR(filename, "stat");
2129                 return NULL;
2130         }
2131
2132         mimeinfo = procmime_mimeinfo_new();
2133         mimeinfo->content = MIMECONTENT_FILE;
2134         mimeinfo->encoding_type = ENC_UNKNOWN;
2135         mimeinfo->type = MIMETYPE_MESSAGE;
2136         mimeinfo->subtype = g_strdup("rfc822");
2137         mimeinfo->data.filename = g_strdup(filename);
2138         mimeinfo->offset = offset;
2139         mimeinfo->length = buf.st_size - offset;
2140
2141         procmime_parse_message_rfc822(mimeinfo, short_scan);
2142         if (debug_get_mode())
2143                 output_mime_structure(mimeinfo, 0);
2144
2145         return mimeinfo;
2146 }
2147
2148 static MimeInfo *procmime_scan_file_full(const gchar *filename, gboolean short_scan)
2149 {
2150         MimeInfo *mimeinfo;
2151
2152         cm_return_val_if_fail(filename != NULL, NULL);
2153
2154         mimeinfo = procmime_scan_file_with_offset(filename, 0, short_scan);
2155
2156         return mimeinfo;
2157 }
2158
2159 MimeInfo *procmime_scan_file(const gchar *filename)
2160 {
2161         return procmime_scan_file_full(filename, FALSE);
2162 }
2163
2164 static MimeInfo *procmime_scan_file_short(const gchar *filename)
2165 {
2166         return procmime_scan_file_full(filename, TRUE);
2167 }
2168
2169 static MimeInfo *procmime_scan_queue_file_full(const gchar *filename, gboolean short_scan)
2170 {
2171         FILE *fp;
2172         MimeInfo *mimeinfo;
2173         gchar buf[BUFFSIZE];
2174         gint offset = 0;
2175
2176         cm_return_val_if_fail(filename != NULL, NULL);
2177
2178         /* Open file */
2179         if ((fp = claws_fopen(filename, "rb")) == NULL)
2180                 return NULL;
2181         /* Skip queue header */
2182         while (claws_fgets(buf, sizeof(buf), fp) != NULL) {
2183                 /* new way */
2184                 if ((!strncmp(buf, "X-Claws-End-Special-Headers: 1",
2185                         strlen("X-Claws-End-Special-Headers:"))) ||
2186                    (!strncmp(buf, "X-Sylpheed-End-Special-Headers: 1",
2187                         strlen("X-Sylpheed-End-Special-Headers:"))))
2188                         break;
2189                 /* old way */
2190                 if (buf[0] == '\r' || buf[0] == '\n') break;
2191                 /* from other mailers */
2192                 if (!strncmp(buf, "Date: ", 6)
2193                 ||  !strncmp(buf, "To: ", 4)
2194                 ||  !strncmp(buf, "From: ", 6)
2195                 ||  !strncmp(buf, "Subject: ", 9)) {
2196                         rewind(fp);
2197                         break;
2198                 }
2199         }
2200         offset = ftell(fp);
2201         claws_fclose(fp);
2202
2203         mimeinfo = procmime_scan_file_with_offset(filename, offset, short_scan);
2204
2205         return mimeinfo;
2206 }
2207
2208 MimeInfo *procmime_scan_queue_file(const gchar *filename)
2209 {
2210         return procmime_scan_queue_file_full(filename, FALSE);
2211 }
2212
2213 static MimeInfo *procmime_scan_queue_file_short(const gchar *filename)
2214 {
2215         return procmime_scan_queue_file_full(filename, TRUE);
2216 }
2217
2218 typedef enum {
2219     ENC_AS_TOKEN,
2220     ENC_AS_QUOTED_STRING,
2221     ENC_AS_EXTENDED,
2222     ENC_AS_ENCWORD
2223 } EncodeAs;
2224
2225 typedef struct _ParametersData {
2226         FILE *fp;
2227         guint len;
2228         gint error;
2229 } ParametersData;
2230
2231 static void write_parameters(gpointer key, gpointer value, gpointer user_data)
2232 {
2233         gchar *param = key;
2234         gchar *val = value, *valpos, *tmp;
2235         ParametersData *pdata = (ParametersData *)user_data;
2236         GString *buf = g_string_new("");
2237         gint len;
2238
2239         EncodeAs encas = ENC_AS_TOKEN;
2240
2241         for (valpos = val; *valpos != 0; valpos++) {
2242                 if (!IS_ASCII(*valpos)) {
2243                         encas = ENC_AS_ENCWORD;
2244                         break;
2245                 }
2246
2247                 /* CTLs */
2248                 if (((*valpos >= 0) && (*valpos < 037)) || (*valpos == 0177)) {
2249                         encas = ENC_AS_QUOTED_STRING;
2250                         continue;
2251                 }
2252
2253                 /* tspecials + SPACE */
2254                 switch (*valpos) {
2255                 case ' ':
2256                 case '(':
2257                 case ')':
2258                 case '<':
2259                 case '>':
2260                 case '@':
2261                 case ',':
2262                 case ';':
2263                 case ':':
2264                 case '\\':
2265                 case '"':
2266                 case '/':
2267                 case '[':
2268                 case ']':
2269                 case '?':
2270                 case '=':
2271                         encas = ENC_AS_QUOTED_STRING;
2272                         continue;
2273                 }
2274         }
2275
2276         switch (encas) {
2277         case ENC_AS_TOKEN:
2278                 g_string_append_printf(buf, "%s=%s", param, val);
2279                 break;
2280
2281         case ENC_AS_QUOTED_STRING:
2282                 g_string_append_printf(buf, "%s=\"%s\"", param, val);
2283                 break;
2284
2285 #if 0 /* we don't use that for now */
2286         case ENC_AS_EXTENDED:
2287                 if (!g_utf8_validate(val, -1, NULL))
2288                         g_string_append_printf(buf, "%s*=%s''", param,
2289                                 conv_get_locale_charset_str());
2290                 else
2291                         g_string_append_printf(buf, "%s*=%s''", param,
2292                                 CS_INTERNAL);
2293                 for (valpos = val; *valpos != '\0'; valpos++) {
2294                         if (IS_ASCII(*valpos) && isalnum(*valpos)) {
2295                                 g_string_append_printf(buf, "%c", *valpos);
2296                         } else {
2297                                 gchar hexstr[3] = "XX";
2298                                 get_hex_str(hexstr, *valpos);
2299                                 g_string_append_printf(buf, "%%%s", hexstr);
2300                         }
2301                 }
2302                 break;
2303 #else
2304         case ENC_AS_EXTENDED:
2305                 debug_print("Unhandled ENC_AS_EXTENDED.\n");
2306                 break;
2307 #endif
2308         case ENC_AS_ENCWORD:
2309                 len = MAX(strlen(val)*6, 512);
2310                 tmp = g_malloc(len+1);
2311                 codeconv_set_strict(TRUE);
2312                 conv_encode_header_full(tmp, len, val, pdata->len + strlen(param) + 4 , FALSE,
2313                         prefs_common.outgoing_charset);
2314                 codeconv_set_strict(FALSE);
2315                 if (!tmp || !*tmp) {
2316                         codeconv_set_strict(TRUE);
2317                         conv_encode_header_full(tmp, len, val, pdata->len + strlen(param) + 4 , FALSE,
2318                                 conv_get_outgoing_charset_str());
2319                         codeconv_set_strict(FALSE);
2320                 }
2321                 if (!tmp || !*tmp) {
2322                         codeconv_set_strict(TRUE);
2323                         conv_encode_header_full(tmp, len, val, pdata->len + strlen(param) + 4 , FALSE,
2324                                 CS_UTF_8);
2325                         codeconv_set_strict(FALSE);
2326                 }
2327                 if (!tmp || !*tmp) {
2328                         conv_encode_header_full(tmp, len, val, pdata->len + strlen(param) + 4 , FALSE,
2329                                 CS_UTF_8);
2330                 }
2331                 g_string_append_printf(buf, "%s=\"%s\"", param, tmp);
2332                 g_free(tmp);
2333                 break;
2334
2335         }
2336
2337         if (buf->str && strlen(buf->str)) {
2338                 tmp = strstr(buf->str, "\n");
2339                 if (tmp)
2340                         len = (tmp - buf->str);
2341                 else
2342                         len = strlen(buf->str);
2343                 if (pdata->len + len > 76) {
2344                         if (fprintf(pdata->fp, ";\n %s", buf->str) < 0)
2345                                 pdata->error = TRUE;
2346                         pdata->len = strlen(buf->str) + 1;
2347                 } else {
2348                         if (fprintf(pdata->fp, "; %s", buf->str) < 0)
2349                                 pdata->error = TRUE;
2350                         pdata->len += strlen(buf->str) + 2;
2351                 }
2352         }
2353         g_string_free(buf, TRUE);
2354 }
2355
2356 #define TRY(func) { \
2357         if (!(func)) { \
2358                 return -1; \
2359         } \
2360 }
2361
2362 int procmime_write_mime_header(MimeInfo *mimeinfo, FILE *fp)
2363 {
2364         struct TypeTable *type_table;
2365         ParametersData *pdata = g_new0(ParametersData, 1);
2366         debug_print("procmime_write_mime_header\n");
2367
2368         pdata->fp = fp;
2369         pdata->error = FALSE;
2370         for (type_table = mime_type_table; type_table->str != NULL; type_table++)
2371                 if (mimeinfo->type == type_table->type) {
2372                         gchar *buf = g_strdup_printf(
2373                                 "Content-Type: %s/%s", type_table->str, mimeinfo->subtype);
2374                         if (fprintf(fp, "%s", buf) < 0) {
2375                                 g_free(buf);
2376                                 g_free(pdata);
2377                                 return -1;
2378                         }
2379                         pdata->len = strlen(buf);
2380                         g_free(buf);
2381                         break;
2382                 }
2383         g_hash_table_foreach(mimeinfo->typeparameters, write_parameters, pdata);
2384         if (pdata->error == TRUE) {
2385                 g_free(pdata);
2386                 return -1;
2387         }
2388         g_free(pdata);
2389
2390         TRY(fprintf(fp, "\n") >= 0);
2391
2392         if (mimeinfo->encoding_type != ENC_UNKNOWN)
2393                 TRY(fprintf(fp, "Content-Transfer-Encoding: %s\n", procmime_get_encoding_str(mimeinfo->encoding_type)) >= 0);
2394
2395         if (mimeinfo->description != NULL)
2396                 TRY(fprintf(fp, "Content-Description: %s\n", mimeinfo->description) >= 0);
2397
2398         if (mimeinfo->id != NULL)
2399                 TRY(fprintf(fp, "Content-ID: %s\n", mimeinfo->id) >= 0);
2400
2401         if (mimeinfo->location != NULL)
2402                 TRY(fprintf(fp, "Content-Location: %s\n", mimeinfo->location) >= 0);
2403
2404         if (mimeinfo->disposition != DISPOSITIONTYPE_UNKNOWN) {
2405                 ParametersData *pdata = g_new0(ParametersData, 1);
2406                 gchar *buf = NULL;
2407                 if (mimeinfo->disposition == DISPOSITIONTYPE_INLINE)
2408                         buf = g_strdup("Content-Disposition: inline");
2409                 else if (mimeinfo->disposition == DISPOSITIONTYPE_ATTACHMENT)
2410                         buf = g_strdup("Content-Disposition: attachment");
2411                 else
2412                         buf = g_strdup("Content-Disposition: unknown");
2413
2414                 if (fprintf(fp, "%s", buf) < 0) {
2415                         g_free(buf);
2416                         g_free(pdata);
2417                         return -1;
2418                 }
2419                 pdata->len = strlen(buf);
2420                 g_free(buf);
2421
2422                 pdata->fp = fp;
2423                 pdata->error = FALSE;
2424                 g_hash_table_foreach(mimeinfo->dispositionparameters, write_parameters, pdata);
2425                 if (pdata->error == TRUE) {
2426                         g_free(pdata);
2427                         return -1;
2428                 }
2429                 g_free(pdata);
2430                 TRY(fprintf(fp, "\n") >= 0);
2431         }
2432
2433         TRY(fprintf(fp, "\n") >= 0);
2434
2435         return 0;
2436 }
2437
2438 static gint procmime_write_message_rfc822(MimeInfo *mimeinfo, FILE *fp)
2439 {
2440         FILE *infp;
2441         GNode *childnode;
2442         MimeInfo *child;
2443         gchar buf[BUFFSIZE];
2444         gboolean skip = FALSE;;
2445         size_t len;
2446
2447         debug_print("procmime_write_message_rfc822\n");
2448
2449         /* write header */
2450         switch (mimeinfo->content) {
2451         case MIMECONTENT_FILE:
2452                 if ((infp = claws_fopen(mimeinfo->data.filename, "rb")) == NULL) {
2453                         FILE_OP_ERROR(mimeinfo->data.filename, "claws_fopen");
2454                         return -1;
2455                 }
2456                 if (fseek(infp, mimeinfo->offset, SEEK_SET) < 0) {
2457                         FILE_OP_ERROR(mimeinfo->data.filename, "fseek");
2458                         claws_fclose(infp);
2459                         return -1;
2460                 }
2461                 while (claws_fgets(buf, sizeof(buf), infp) == buf) {
2462                         strcrchomp(buf);
2463                         if (buf[0] == '\n' && buf[1] == '\0')
2464                                 break;
2465                         if (skip && (buf[0] == ' ' || buf[0] == '\t'))
2466                                 continue;
2467                         if (g_ascii_strncasecmp(buf, "MIME-Version:", 13) == 0 ||
2468                             g_ascii_strncasecmp(buf, "Content-Type:", 13) == 0 ||
2469                             g_ascii_strncasecmp(buf, "Content-Transfer-Encoding:", 26) == 0 ||
2470                             g_ascii_strncasecmp(buf, "Content-Description:", 20) == 0 ||
2471                             g_ascii_strncasecmp(buf, "Content-ID:", 11) == 0 ||
2472                             g_ascii_strncasecmp(buf, "Content-Location:", 17) == 0 ||
2473                             g_ascii_strncasecmp(buf, "Content-Disposition:", 20) == 0) {
2474                                 skip = TRUE;
2475                                 continue;
2476                         }
2477                         len = strlen(buf);
2478                         if (claws_fwrite(buf, sizeof(gchar), len, fp) < len) {
2479                                 g_warning("failed to dump %"G_GSIZE_FORMAT" bytes from file", len);
2480                                 claws_fclose(infp);
2481                                 return -1;
2482                         }
2483                         skip = FALSE;
2484                 }
2485                 claws_fclose(infp);
2486                 break;
2487
2488         case MIMECONTENT_MEM:
2489                 len = strlen(mimeinfo->data.mem);
2490                 if (claws_fwrite(mimeinfo->data.mem, sizeof(gchar), len, fp) < len) {
2491                         g_warning("failed to dump %"G_GSIZE_FORMAT" bytes from mem", len);
2492                         return -1;
2493                 }
2494                 break;
2495
2496         default:
2497                 break;
2498         }
2499
2500         childnode = mimeinfo->node->children;
2501         if (childnode == NULL)
2502                 return -1;
2503
2504         child = (MimeInfo *) childnode->data;
2505         if (fprintf(fp, "MIME-Version: 1.0\n") < 0) {
2506                 g_warning("failed to write mime version");
2507                 return -1;
2508         }
2509         if (procmime_write_mime_header(child, fp) < 0)
2510                 return -1;
2511         return procmime_write_mimeinfo(child, fp);
2512 }
2513
2514 static gint procmime_write_multipart(MimeInfo *mimeinfo, FILE *fp)
2515 {
2516         FILE *infp;
2517         GNode *childnode;
2518         gchar *boundary, *str, *str2;
2519         gchar buf[BUFFSIZE];
2520         gboolean firstboundary;
2521         size_t len;
2522
2523         debug_print("procmime_write_multipart\n");
2524
2525         boundary = g_hash_table_lookup(mimeinfo->typeparameters, "boundary");
2526
2527         switch (mimeinfo->content) {
2528         case MIMECONTENT_FILE:
2529                 if ((infp = claws_fopen(mimeinfo->data.filename, "rb")) == NULL) {
2530                         FILE_OP_ERROR(mimeinfo->data.filename, "claws_fopen");
2531                         return -1;
2532                 }
2533                 if (fseek(infp, mimeinfo->offset, SEEK_SET) < 0) {
2534                         FILE_OP_ERROR(mimeinfo->data.filename, "fseek");
2535                         claws_fclose(infp);
2536                         return -1;
2537                 }
2538                 while (claws_fgets(buf, sizeof(buf), infp) == buf) {
2539                         if (IS_BOUNDARY(buf, boundary, strlen(boundary)))
2540                                 break;
2541                         len = strlen(buf);
2542                         if (claws_fwrite(buf, sizeof(gchar), len, fp) < len) {
2543                                 g_warning("failed to write %"G_GSIZE_FORMAT, len);
2544                                 claws_fclose(infp);
2545                                 return -1;
2546                         }
2547                 }
2548                 claws_fclose(infp);
2549                 break;
2550
2551         case MIMECONTENT_MEM:
2552                 str = g_strdup(mimeinfo->data.mem);
2553                 if (((str2 = strstr(str, boundary)) != NULL) && ((str2 - str) >= 2) &&
2554                     (*(str2 - 1) == '-') && (*(str2 - 2) == '-'))
2555                         *(str2 - 2) = '\0';
2556                 len = strlen(str);
2557                 if (claws_fwrite(str, sizeof(gchar), len, fp) < len) {
2558                         g_warning("failed to write %"G_GSIZE_FORMAT" from mem", len);
2559                         g_free(str);
2560                         return -1;
2561                 }
2562                 g_free(str);
2563                 break;
2564
2565         default:
2566                 break;
2567         }
2568
2569         childnode = mimeinfo->node->children;
2570         firstboundary = TRUE;
2571         while (childnode != NULL) {
2572                 MimeInfo *child = childnode->data;
2573
2574                 if (firstboundary)
2575                         firstboundary = FALSE;
2576                 else
2577                         TRY(fprintf(fp, "\n") >= 0);
2578
2579                 TRY(fprintf(fp, "--%s\n", boundary) >= 0);
2580
2581                 if (procmime_write_mime_header(child, fp) < 0)
2582                         return -1;
2583                 if (procmime_write_mimeinfo(child, fp) < 0)
2584                         return -1;
2585
2586                 childnode = g_node_next_sibling(childnode);
2587         }
2588         TRY(fprintf(fp, "\n--%s--\n", boundary) >= 0);
2589
2590         return 0;
2591 }
2592
2593 gint procmime_write_mimeinfo(MimeInfo *mimeinfo, FILE *fp)
2594 {
2595         FILE *infp;
2596         size_t len;
2597         debug_print("procmime_write_mimeinfo\n");
2598
2599         if (G_NODE_IS_LEAF(mimeinfo->node)) {
2600                 switch (mimeinfo->content) {
2601                 case MIMECONTENT_FILE:
2602                         if ((infp = claws_fopen(mimeinfo->data.filename, "rb")) == NULL) {
2603                                 FILE_OP_ERROR(mimeinfo->data.filename, "claws_fopen");
2604                                 return -1;
2605                         }
2606                         copy_file_part_to_fp(infp, mimeinfo->offset, mimeinfo->length, fp);
2607                         claws_fclose(infp);
2608                         return 0;
2609
2610                 case MIMECONTENT_MEM:
2611                         len = strlen(mimeinfo->data.mem);
2612                         if (claws_fwrite(mimeinfo->data.mem, sizeof(gchar), len, fp) < len)
2613                                 return -1;
2614                         return 0;
2615
2616                 default:
2617                         return 0;
2618                 }
2619         } else {
2620                 /* Call writer for mime type */
2621                 switch (mimeinfo->type) {
2622                 case MIMETYPE_MESSAGE:
2623                         if (g_ascii_strcasecmp(mimeinfo->subtype, "rfc822") == 0) {
2624                                 return procmime_write_message_rfc822(mimeinfo, fp);
2625                         }
2626                         break;
2627
2628                 case MIMETYPE_MULTIPART:
2629                         return procmime_write_multipart(mimeinfo, fp);
2630
2631                 default:
2632                         break;
2633                 }
2634
2635                 return -1;
2636         }
2637
2638         return 0;
2639 }
2640
2641 gchar *procmime_get_part_file_name(MimeInfo *mimeinfo)
2642 {
2643         gchar *base;
2644
2645         if ((mimeinfo->type == MIMETYPE_TEXT) && !g_ascii_strcasecmp(mimeinfo->subtype, "html"))
2646                 base = g_strdup("mimetmp.html");
2647         else {
2648                 const gchar *basetmp;
2649                 gchar *basename;
2650
2651                 basetmp = procmime_mimeinfo_get_parameter(mimeinfo, "filename");
2652                 if (basetmp == NULL)
2653                         basetmp = procmime_mimeinfo_get_parameter(mimeinfo, "name");
2654                 if (basetmp == NULL)
2655                         basetmp = "mimetmp";
2656                 basename = g_path_get_basename(basetmp);
2657                 if (*basename == '\0') {
2658                         g_free(basename);
2659                         basename = g_strdup("mimetmp");
2660                 }
2661                 base = conv_filename_from_utf8(basename);
2662                 g_free(basename);
2663                 subst_for_shellsafe_filename(base);
2664         }
2665
2666         return base;
2667 }
2668
2669 void *procmime_get_part_as_string(MimeInfo *mimeinfo,
2670                 gboolean null_terminate)
2671 {
2672         FILE *infp;
2673         gchar *data;
2674         gint length, readlength;
2675
2676         cm_return_val_if_fail(mimeinfo != NULL, NULL);
2677
2678         if (mimeinfo->encoding_type != ENC_BINARY &&
2679                         !procmime_decode_content(mimeinfo))
2680                 return NULL;
2681
2682         if (mimeinfo->content == MIMECONTENT_MEM)
2683                 return g_strdup(mimeinfo->data.mem);
2684
2685         if ((infp = claws_fopen(mimeinfo->data.filename, "rb")) == NULL) {
2686                 FILE_OP_ERROR(mimeinfo->data.filename, "claws_fopen");
2687                 return NULL;
2688         }
2689
2690         if (fseek(infp, mimeinfo->offset, SEEK_SET) < 0) {
2691                 FILE_OP_ERROR(mimeinfo->data.filename, "fseek");
2692                 claws_fclose(infp);
2693                 return NULL;
2694         }
2695
2696         length = mimeinfo->length;
2697
2698         data = g_malloc(null_terminate ? length + 1 : length);
2699         if (data == NULL) {
2700                 g_warning("Could not allocate %d bytes for procmime_get_part_as_string.\n",
2701                                 (null_terminate ? length + 1 : length));
2702                 claws_fclose(infp);
2703                 return NULL;
2704         }
2705
2706         readlength = claws_fread(data, length, 1, infp);
2707         if (readlength <= 0) {
2708                 FILE_OP_ERROR(mimeinfo->data.filename, "fread");
2709                 g_free(data);
2710                 claws_fclose(infp);
2711                 return NULL;
2712         }
2713
2714         claws_fclose(infp);
2715
2716         if (null_terminate)
2717                 data[length] = '\0';
2718
2719         return data;
2720 }
2721
2722 /* Returns an open GInputStream. The caller should just
2723  * read mimeinfo->length bytes from it and then release it. */
2724 GInputStream *procmime_get_part_as_inputstream(MimeInfo *mimeinfo)
2725 {
2726         cm_return_val_if_fail(mimeinfo != NULL, NULL);
2727
2728         if (mimeinfo->encoding_type != ENC_BINARY &&
2729                         !procmime_decode_content(mimeinfo)) {
2730                 g_warning("could not decode part");
2731                 return NULL;
2732         }
2733         if (mimeinfo->content == MIMECONTENT_MEM) {
2734                 /* NULL for destroy func, since we're not copying
2735                  * the data for the stream. */
2736                 return g_memory_input_stream_new_from_data(
2737                                 mimeinfo->data.mem,
2738                                 mimeinfo->length, NULL);
2739         } else {
2740                 return g_memory_input_stream_new_from_data(
2741                                 procmime_get_part_as_string(mimeinfo, FALSE),
2742                                 mimeinfo->length, g_free);
2743         }
2744 }
2745
2746 GdkPixbuf *procmime_get_part_as_pixbuf(MimeInfo *mimeinfo, GError **error)
2747 {
2748         GdkPixbuf *pixbuf;
2749         GInputStream *stream;
2750
2751         if (error)
2752                 *error = NULL;
2753
2754         stream = procmime_get_part_as_inputstream(mimeinfo);
2755         if (stream == NULL) {
2756                 if (error)
2757                         *error = g_error_new_literal(G_FILE_ERROR, -1, _("Could not decode part"));
2758                 return NULL;
2759         }
2760
2761         pixbuf = gdk_pixbuf_new_from_stream(stream, NULL, error);
2762         g_object_unref(stream);
2763
2764         if (error && *error != NULL)
2765                 return NULL;
2766
2767         return pixbuf;
2768 }
2769