src/plugins/pgpinline/pgpinline.c

   1 /*
   2  * Claws Mail -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2015 Colin Leroy <colin@colino.net> and
   4  * the Claws Mail team
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 3 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  18  *
  19  */
  20
  21 #ifdef HAVE_CONFIG_H
  22 #  include "config.h"
  23 #include "claws-features.h"
  24 #endif
  25
  26 #ifdef USE_GPGME
  27
  28 #include "defs.h"
  29 #include <glib.h>
  30 #include <glib/gi18n.h>
  31 #include <errno.h>
  32 #include <gpgme.h>
  33
  34 #include "utils.h"
  35 #include "privacy.h"
  36 #include "procmime.h"
  37 #include "pgpinline.h"
  38 #include <plugins/pgpcore/sgpgme.h>
  39 #include <plugins/pgpcore/prefs_gpg.h>
  40 #include <plugins/pgpcore/passphrase.h>
  41 #include <plugins/pgpcore/pgp_utils.h>
  42 #include "quoted-printable.h"
  43 #include "codeconv.h"
  44 #include "plugin.h"
  45
  46 extern struct GPGConfig prefs_gpg;
  47
  48 typedef struct _PrivacyDataPGP PrivacyDataPGP;
  49
  50 struct _PrivacyDataPGP
  51 {
  52         PrivacyData     data;
  53
  54         gboolean        done_sigtest;
  55         gboolean        is_signed;
  56         gpgme_verify_result_t   sigstatus;
  57         gpgme_ctx_t     ctx;
  58 };
  59
  60 static PrivacySystem pgpinline_system;
  61
  62 static gint pgpinline_check_signature(MimeInfo *mimeinfo);
  63
  64 static PrivacyDataPGP *pgpinline_new_privacydata()
  65 {
  66         PrivacyDataPGP *data;
  67         gpgme_error_t err;
  68
  69         data = g_new0(PrivacyDataPGP, 1);
  70         data->data.system = &pgpinline_system;
  71         data->done_sigtest = FALSE;
  72         data->is_signed = FALSE;
  73         data->sigstatus = NULL;
  74         if ((err = gpgme_new(&data->ctx)) != GPG_ERR_NO_ERROR) {
  75                 debug_print(("Couldn't initialize GPG context, %s"), gpgme_strerror(err));
  76                 return NULL;
  77         }
  78
  79         return data;
  80 }
  81
  82 static void pgpinline_free_privacydata(PrivacyData *_data)
  83 {
  84         PrivacyDataPGP *data = (PrivacyDataPGP *) _data;
  85         gpgme_release(data->ctx);
  86         g_free(data);
  87 }
  88
  89 static gboolean pgpinline_is_signed(MimeInfo *mimeinfo)
  90 {
  91         PrivacyDataPGP *data = NULL;
  92         const gchar *sig_indicator = "-----BEGIN PGP SIGNED MESSAGE-----";
  93         gchar *textdata, *sigpos;
  94
  95         cm_return_val_if_fail(mimeinfo != NULL, FALSE);
  96
  97         if (procmime_mimeinfo_parent(mimeinfo) == NULL)
  98                 return FALSE; /* not parent */
  99
 100         if (mimeinfo->type != MIMETYPE_TEXT &&
 101                 (mimeinfo->type != MIMETYPE_APPLICATION ||
 102                  g_ascii_strcasecmp(mimeinfo->subtype, "pgp")))
 103                 return FALSE;
 104
 105         /* Seal the deal. This has to be text/plain through and through. */
 106         if (mimeinfo->type == MIMETYPE_APPLICATION)
 107         {
 108                 mimeinfo->type = MIMETYPE_TEXT;
 109                 g_free(mimeinfo->subtype);
 110                 mimeinfo->subtype = g_strdup("plain");
 111         }
 112
 113         if (mimeinfo->privacy != NULL) {
 114                 data = (PrivacyDataPGP *) mimeinfo->privacy;
 115                 if (data->done_sigtest)
 116                         return data->is_signed;
 117         }
 118
 119         textdata = get_part_as_string(mimeinfo);
 120         if (!textdata)
 121                 return FALSE;
 122
 123         if ((sigpos = strstr(textdata, sig_indicator)) == NULL) {
 124                 g_free(textdata);
 125                 return FALSE;
 126         }
 127
 128         if (!(sigpos == textdata) && !(sigpos[-1] == '\n')) {
 129                 g_free(textdata);
 130                 return FALSE;
 131         }
 132
 133         g_free(textdata);
 134
 135         if (data == NULL) {
 136                 data = pgpinline_new_privacydata();
 137                 mimeinfo->privacy = (PrivacyData *) data;
 138         }
 139         if (data != NULL) {
 140                 data->done_sigtest = TRUE;
 141                 data->is_signed = TRUE;
 142         }
 143
 144         return TRUE;
 145 }
 146
 147 static gint pgpinline_check_signature(MimeInfo *mimeinfo)
 148 {
 149         PrivacyDataPGP *data = NULL;
 150         gchar *textdata = NULL, *tmp = NULL;
 151         gpgme_data_t plain = NULL, cipher = NULL;
 152         gpgme_error_t err;
 153
 154         cm_return_val_if_fail(mimeinfo != NULL, 0);
 155
 156         if (procmime_mimeinfo_parent(mimeinfo) == NULL) {
 157                 privacy_set_error(_("Incorrect part"));
 158                 return 0; /* not parent */
 159         }
 160         if (mimeinfo->type != MIMETYPE_TEXT) {
 161                 privacy_set_error(_("Not a text part"));
 162                 debug_print("type %d\n", mimeinfo->type);
 163                 return 0;
 164         }
 165         cm_return_val_if_fail(mimeinfo->privacy != NULL, 0);
 166         data = (PrivacyDataPGP *) mimeinfo->privacy;
 167
 168         textdata = get_part_as_string(mimeinfo);
 169
 170         if (!textdata) {
 171                 g_free(textdata);
 172                 privacy_set_error(_("Couldn't get text data."));
 173                 return 0;
 174         }
 175
 176         /* gtk2: convert back from utf8 */
 177         tmp = conv_codeset_strdup(textdata, CS_UTF_8,
 178                         procmime_mimeinfo_get_parameter(mimeinfo, "charset"));
 179         if (!tmp) {
 180                 tmp = conv_codeset_strdup(textdata, CS_UTF_8,
 181                         conv_get_locale_charset_str_no_utf8());
 182         }
 183         if (!tmp) {
 184                 g_warning("Can't convert charset to anything sane");
 185                 tmp = conv_codeset_strdup(textdata, CS_UTF_8, CS_US_ASCII);
 186         }
 187         g_free(textdata);
 188
 189         if (!tmp) {
 190                 privacy_set_error(_("Couldn't convert text data to any sane charset."));
 191                 return 0;
 192         }
 193         textdata = g_strdup(tmp);
 194         g_free(tmp);
 195
 196         if ((err = gpgme_new(&data->ctx)) != GPG_ERR_NO_ERROR) {
 197                 debug_print(("Couldn't initialize GPG context, %s"), gpgme_strerror(err));
 198                 privacy_set_error(_("Couldn't initialize GPG context, %s"), gpgme_strerror(err));
 199                 g_free(textdata);
 200                 return 0;
 201         }
 202         gpgme_set_textmode(data->ctx, 1);
 203         gpgme_set_armor(data->ctx, 1);
 204
 205         gpgme_data_new_from_mem(&plain, textdata, (size_t)strlen(textdata), 1);
 206         gpgme_data_new(&cipher);
 207
 208         data->sigstatus = sgpgme_verify_signature(data->ctx, plain, NULL, cipher);
 209
 210         gpgme_data_release(plain);
 211         gpgme_data_release(cipher);
 212
 213         g_free(textdata);
 214
 215         return 0;
 216 }
 217
 218 static SignatureStatus pgpinline_get_sig_status(MimeInfo *mimeinfo)
 219 {
 220         PrivacyDataPGP *data = (PrivacyDataPGP *) mimeinfo->privacy;
 221
 222         cm_return_val_if_fail(data != NULL, SIGNATURE_INVALID);
 223
 224         return sgpgme_sigstat_gpgme_to_privacy(data->ctx, data->sigstatus);
 225 }
 226
 227 static gchar *pgpinline_get_sig_info_short(MimeInfo *mimeinfo)
 228 {
 229         PrivacyDataPGP *data = (PrivacyDataPGP *) mimeinfo->privacy;
 230
 231         cm_return_val_if_fail(data != NULL, g_strdup("Error"));
 232
 233         return sgpgme_sigstat_info_short(data->ctx, data->sigstatus);
 234 }
 235
 236 static gchar *pgpinline_get_sig_info_full(MimeInfo *mimeinfo)
 237 {
 238         PrivacyDataPGP *data = (PrivacyDataPGP *) mimeinfo->privacy;
 239
 240         cm_return_val_if_fail(data != NULL, g_strdup("Error"));
 241
 242         return sgpgme_sigstat_info_full(data->ctx, data->sigstatus);
 243 }
 244
 245 static gboolean pgpinline_is_encrypted(MimeInfo *mimeinfo)
 246 {
 247         const gchar *begin_indicator = "-----BEGIN PGP MESSAGE-----";
 248         const gchar *end_indicator = "-----END PGP MESSAGE-----";
 249         gchar *textdata;
 250
 251         cm_return_val_if_fail(mimeinfo != NULL, FALSE);
 252
 253         if (procmime_mimeinfo_parent(mimeinfo) == NULL)
 254                 return FALSE; /* not parent */
 255
 256         if (mimeinfo->type != MIMETYPE_TEXT &&
 257                 (mimeinfo->type != MIMETYPE_APPLICATION ||
 258                  g_ascii_strcasecmp(mimeinfo->subtype, "pgp")))
 259                 return FALSE;
 260
 261         /* Seal the deal. This has to be text/plain through and through. */
 262         if (mimeinfo->type == MIMETYPE_APPLICATION)
 263         {
 264                 mimeinfo->type = MIMETYPE_TEXT;
 265                 g_free(mimeinfo->subtype);
 266                 mimeinfo->subtype = g_strdup("plain");
 267         }
 268
 269         textdata = get_part_as_string(mimeinfo);
 270         if (!textdata)
 271                 return FALSE;
 272
 273         if (!pgp_locate_armor_header(textdata, begin_indicator)) {
 274                 g_free(textdata);
 275                 return FALSE;
 276         }
 277         if (!pgp_locate_armor_header(textdata, end_indicator)) {
 278                 g_free(textdata);
 279                 return FALSE;
 280         }
 281
 282         g_free(textdata);
 283
 284         return TRUE;
 285 }
 286
 287 static MimeInfo *pgpinline_decrypt(MimeInfo *mimeinfo)
 288 {
 289         MimeInfo *decinfo, *parseinfo;
 290         gpgme_data_t cipher, plain;
 291         FILE *dstfp;
 292         gchar *fname;
 293         gchar *textdata = NULL;
 294         static gint id = 0;
 295         const gchar *src_codeset = NULL;
 296         gpgme_verify_result_t sigstat = 0;
 297         PrivacyDataPGP *data = NULL;
 298         gpgme_ctx_t ctx;
 299         gchar *chars;
 300         size_t len;
 301         const gchar *begin_indicator = "-----BEGIN PGP MESSAGE-----";
 302         const gchar *end_indicator = "-----END PGP MESSAGE-----";
 303         gchar *pos;
 304
 305         if (gpgme_new(&ctx) != GPG_ERR_NO_ERROR)
 306                 return NULL;
 307
 308         gpgme_set_textmode(ctx, 1);
 309         gpgme_set_armor(ctx, 1);
 310
 311         cm_return_val_if_fail(mimeinfo != NULL, NULL);
 312         cm_return_val_if_fail(pgpinline_is_encrypted(mimeinfo), NULL);
 313
 314         if (procmime_mimeinfo_parent(mimeinfo) == NULL ||
 315             mimeinfo->type != MIMETYPE_TEXT) {
 316                 gpgme_release(ctx);
 317                 privacy_set_error(_("Couldn't parse mime part."));
 318                 return NULL;
 319         }
 320
 321         textdata = get_part_as_string(mimeinfo);
 322         if (!textdata) {
 323                 gpgme_release(ctx);
 324                 privacy_set_error(_("Couldn't get text data."));
 325                 return NULL;
 326         }
 327
 328         debug_print("decrypting '%s'\n", textdata);
 329         gpgme_data_new_from_mem(&cipher, textdata, (size_t)strlen(textdata), 1);
 330
 331         plain = sgpgme_decrypt_verify(cipher, &sigstat, ctx);
 332         if (sigstat && !sigstat->signatures)
 333                 sigstat = NULL;
 334
 335         gpgme_data_release(cipher);
 336
 337         if (plain == NULL) {
 338                 gpgme_release(ctx);
 339                 return NULL;
 340         }
 341
 342         fname = g_strdup_printf("%s%cplaintext.%08x",
 343                 get_mime_tmp_dir(), G_DIR_SEPARATOR, ++id);
 344
 345         if ((dstfp = g_fopen(fname, "wb")) == NULL) {
 346                 FILE_OP_ERROR(fname, "fopen");
 347                 privacy_set_error(_("Couldn't open decrypted file %s"), fname);
 348                 g_free(fname);
 349                 gpgme_data_release(plain);
 350                 gpgme_release(ctx);
 351                 return NULL;
 352         }
 353
 354         src_codeset = procmime_mimeinfo_get_parameter(mimeinfo, "charset");
 355         if (src_codeset == NULL)
 356                 src_codeset = CS_ISO_8859_1;
 357
 358         if (fprintf(dstfp, "MIME-Version: 1.0\r\n"
 359                         "Content-Type: text/plain; charset=%s\r\n"
 360                         "Content-Transfer-Encoding: 8bit\r\n"
 361                         "\r\n",
 362                         src_codeset) < 0) {
 363                 FILE_OP_ERROR(fname, "fprintf");
 364                 privacy_set_error(_("Couldn't write to decrypted file %s"), fname);
 365                 goto FILE_ERROR;
 366         }
 367
 368         /* Store any part before encrypted text */
 369         pos = pgp_locate_armor_header(textdata, begin_indicator);
 370         if (pos != NULL && (pos - textdata) > 0) {
 371             if (fwrite(textdata, 1, pos - textdata, dstfp) < pos - textdata) {
 372                 FILE_OP_ERROR(fname, "fwrite");
 373                 privacy_set_error(_("Couldn't write to decrypted file %s"), fname);
 374                 goto FILE_ERROR;
 375             }
 376         }
 377
 378         if (fwrite(_("\n--- Start of PGP/Inline encrypted data ---\n"), 1,
 379                 strlen(_("\n--- Start of PGP/Inline encrypted data ---\n")),
 380                 dstfp) < strlen(_("\n--- Start of PGP/Inline encrypted data ---\n"))) {
 381                 FILE_OP_ERROR(fname, "fwrite");
 382                 privacy_set_error(_("Couldn't write to decrypted file %s"), fname);
 383                 goto FILE_ERROR;
 384         }
 385         chars = sgpgme_data_release_and_get_mem(plain, &len);
 386         if (len > 0) {
 387                 if (fwrite(chars, 1, len, dstfp) < len) {
 388                         FILE_OP_ERROR(fname, "fwrite");
 389                         g_free(chars);
 390                         privacy_set_error(_("Couldn't write to decrypted file %s"), fname);
 391                         goto FILE_ERROR;
 392                 }
 393         }
 394         g_free(chars);
 395         /* Store any part after encrypted text */
 396         if (fwrite(_("--- End of PGP/Inline encrypted data ---\n"), 1,
 397                 strlen(_("--- End of PGP/Inline encrypted data ---\n")),
 398                 dstfp) < strlen(_("--- End of PGP/Inline encrypted data ---\n"))) {
 399                         FILE_OP_ERROR(fname, "fwrite");
 400                         privacy_set_error(_("Couldn't write to decrypted file %s"), fname);
 401                         goto FILE_ERROR;
 402         }
 403         if (pos != NULL) {
 404             pos = pgp_locate_armor_header(pos, end_indicator);
 405             if (pos != NULL && *pos != '\0') {
 406                 pos += strlen(end_indicator);
 407                 if (fwrite(pos, 1, strlen(pos), dstfp) < strlen(pos)) {
 408                         FILE_OP_ERROR(fname, "fwrite");
 409                         privacy_set_error(_("Couldn't write to decrypted file %s"), fname);
 410                         goto FILE_ERROR;
 411                 }
 412             }
 413         }
 414
 415         if (fclose(dstfp) == EOF) {
 416                 FILE_OP_ERROR(fname, "fclose");
 417                 privacy_set_error(_("Couldn't close decrypted file %s"), fname);
 418                 g_free(fname);
 419                 gpgme_data_release(plain);
 420                 gpgme_release(ctx);
 421                 return NULL;
 422         }
 423
 424         parseinfo = procmime_scan_file(fname);
 425         g_free(fname);
 426
 427         if (parseinfo == NULL) {
 428                 gpgme_release(ctx);
 429                 privacy_set_error(_("Couldn't scan decrypted file."));
 430                 return NULL;
 431         }
 432         decinfo = g_node_first_child(parseinfo->node) != NULL ?
 433                 g_node_first_child(parseinfo->node)->data : NULL;
 434
 435         if (decinfo == NULL) {
 436                 gpgme_release(ctx);
 437                 privacy_set_error(_("Couldn't scan decrypted file parts."));
 438                 return NULL;
 439         }
 440
 441         g_node_unlink(decinfo->node);
 442         procmime_mimeinfo_free_all(parseinfo);
 443
 444         decinfo->tmp = TRUE;
 445
 446         if (sigstat != GPGME_SIG_STAT_NONE) {
 447                 if (decinfo->privacy != NULL) {
 448                         data = (PrivacyDataPGP *) decinfo->privacy;
 449                 } else {
 450                         data = pgpinline_new_privacydata();
 451                         decinfo->privacy = (PrivacyData *) data;
 452                 }
 453                 if (data != NULL) {
 454                         data->done_sigtest = TRUE;
 455                         data->is_signed = TRUE;
 456                         data->sigstatus = sigstat;
 457                         if (data->ctx)
 458                                 gpgme_release(data->ctx);
 459                         data->ctx = ctx;
 460                 }
 461         } else
 462                 gpgme_release(ctx);
 463
 464         return decinfo;
 465
 466 FILE_ERROR:
 467         fclose(dstfp);
 468         g_free(fname);
 469         gpgme_data_release(plain);
 470         gpgme_release(ctx);
 471         return NULL;
 472 }
 473
 474 static gboolean pgpinline_sign(MimeInfo *mimeinfo, PrefsAccount *account, const gchar *from_addr)
 475 {
 476         MimeInfo *msgcontent;
 477         gchar *textstr, *tmp;
 478         FILE *fp;
 479         gchar *sigcontent;
 480         gpgme_ctx_t ctx;
 481         gpgme_data_t gpgtext, gpgsig;
 482         size_t len;
 483         gpgme_error_t err;
 484         struct passphrase_cb_info_s info;
 485         gpgme_sign_result_t result = NULL;
 486
 487         memset (&info, 0, sizeof info);
 488
 489         /* get content node from message */
 490         msgcontent = (MimeInfo *) mimeinfo->node->children->data;
 491         if (msgcontent->type == MIMETYPE_MULTIPART) {
 492                 if (!msgcontent->node->children) {
 493                         debug_print("msgcontent->node->children NULL, bailing\n");
 494                         privacy_set_error(_("Malformed message"));
 495                         return FALSE;
 496                 }
 497                 msgcontent = (MimeInfo *) msgcontent->node->children->data;
 498         }
 499         /* get rid of quoted-printable or anything */
 500         procmime_decode_content(msgcontent);
 501
 502         fp = my_tmpfile();
 503         if (fp == NULL) {
 504                 perror("my_tmpfile");
 505                 privacy_set_error(_("Couldn't create temporary file."));
 506                 return FALSE;
 507         }
 508         procmime_write_mimeinfo(msgcontent, fp);
 509         rewind(fp);
 510
 511         /* read temporary file into memory */
 512         textstr = fp_read_noconv(fp);
 513
 514         fclose(fp);
 515
 516         gpgme_data_new_from_mem(&gpgtext, textstr, (size_t)strlen(textstr), 0);
 517         gpgme_data_new(&gpgsig);
 518         if ((err = gpgme_new(&ctx)) != GPG_ERR_NO_ERROR) {
 519                 debug_print(("Couldn't initialize GPG context, %s"), gpgme_strerror(err));
 520                 privacy_set_error(_("Couldn't initialize GPG context, %s"), gpgme_strerror(err));
 521                 return FALSE;
 522         }
 523         gpgme_set_textmode(ctx, 1);
 524         gpgme_set_armor(ctx, 1);
 525
 526         if (!sgpgme_setup_signers(ctx, account, from_addr)) {
 527                 gpgme_release(ctx);
 528                 return FALSE;
 529         }
 530
 531         prefs_gpg_enable_agent(prefs_gpg_get_config()->use_gpg_agent);
 532         if (!getenv("GPG_AGENT_INFO") || !prefs_gpg_get_config()->use_gpg_agent) {
 533                 info.c = ctx;
 534                 gpgme_set_passphrase_cb (ctx, gpgmegtk_passphrase_cb, &info);
 535         }
 536
 537         err = gpgme_op_sign(ctx, gpgtext, gpgsig, GPGME_SIG_MODE_CLEAR);
 538         if (err != GPG_ERR_NO_ERROR) {
 539                 if (err == GPG_ERR_CANCELED) {
 540                         /* ignore cancelled signing */
 541                         privacy_reset_error();
 542                         debug_print("gpgme_op_sign cancelled\n");
 543                 } else {
 544                         privacy_set_error(_("Data signing failed, %s"), gpgme_strerror(err));
 545                         debug_print("gpgme_op_sign error : %x\n", err);
 546                 }
 547                 gpgme_release(ctx);
 548                 return FALSE;
 549         }
 550         result = gpgme_op_sign_result(ctx);
 551         if (result && result->signatures) {
 552                 gpgme_new_signature_t sig = result->signatures;
 553                 while (sig) {
 554                         debug_print("valid signature: %s\n", sig->fpr);
 555                         sig = sig->next;
 556                 }
 557         } else if (result && result->invalid_signers) {
 558                 gpgme_invalid_key_t invalid = result->invalid_signers;
 559                 while (invalid) {
 560                         g_warning("invalid signer: %s (%s)", invalid->fpr,
 561                                 gpgme_strerror(invalid->reason));
 562                         privacy_set_error(_("Data signing failed due to invalid signer: %s"),
 563                                 gpgme_strerror(invalid->reason));
 564                         invalid = invalid->next;
 565                 }
 566                 gpgme_release(ctx);
 567                 return FALSE;
 568         } else {
 569                 /* can't get result (maybe no signing key?) */
 570                 debug_print("gpgme_op_sign_result error\n");
 571                 privacy_set_error(_("Data signing failed, no results."));
 572                 gpgme_release(ctx);
 573                 return FALSE;
 574         }
 575
 576
 577         sigcontent = sgpgme_data_release_and_get_mem(gpgsig, &len);
 578
 579         if (sigcontent == NULL || len <= 0) {
 580                 g_warning("sgpgme_data_release_and_get_mem failed");
 581                 privacy_set_error(_("Data signing failed, no contents."));
 582                 gpgme_data_release(gpgtext);
 583                 g_free(textstr);
 584                 g_free(sigcontent);
 585                 gpgme_release(ctx);
 586                 return FALSE;
 587         }
 588
 589         tmp = g_malloc(len+1);
 590         g_memmove(tmp, sigcontent, len+1);
 591         tmp[len] = '\0';
 592         gpgme_data_release(gpgtext);
 593         g_free(textstr);
 594         g_free(sigcontent);
 595
 596         if (msgcontent->content == MIMECONTENT_FILE &&
 597             msgcontent->data.filename != NULL) {
 598                 if (msgcontent->tmp == TRUE)
 599                         claws_unlink(msgcontent->data.filename);
 600                 g_free(msgcontent->data.filename);
 601         }
 602         msgcontent->data.mem = g_strdup(tmp);
 603         msgcontent->content = MIMECONTENT_MEM;
 604         g_free(tmp);
 605
 606         /* avoid all sorts of clear-signing problems with non ascii
 607          * chars
 608          */
 609         procmime_encode_content(msgcontent, ENC_BASE64);
 610         gpgme_release(ctx);
 611
 612         return TRUE;
 613 }
 614
 615 static gchar *pgpinline_get_encrypt_data(GSList *recp_names)
 616 {
 617         return sgpgme_get_encrypt_data(recp_names, GPGME_PROTOCOL_OpenPGP);
 618 }
 619
 620 static const gchar *pgpinline_get_encrypt_warning(void)
 621 {
 622         if (prefs_gpg_should_skip_encryption_warning(pgpinline_system.id))
 623                 return NULL;
 624         else
 625                 return _("Please note that attachments are not encrypted by "
 626                  "the PGP/Inline system, nor are email headers, like Subject.");
 627 }
 628
 629 static void pgpinline_inhibit_encrypt_warning(gboolean inhibit)
 630 {
 631         if (inhibit)
 632                 prefs_gpg_add_skip_encryption_warning(pgpinline_system.id);
 633         else
 634                 prefs_gpg_remove_skip_encryption_warning(pgpinline_system.id);
 635 }
 636
 637 static gboolean pgpinline_encrypt(MimeInfo *mimeinfo, const gchar *encrypt_data)
 638 {
 639         MimeInfo *msgcontent;
 640         FILE *fp;
 641         gchar *enccontent;
 642         size_t len;
 643         gchar *textstr, *tmp;
 644         gpgme_data_t gpgtext, gpgenc;
 645         gpgme_ctx_t ctx;
 646         gpgme_key_t *kset = NULL;
 647         gchar **fprs = g_strsplit(encrypt_data, " ", -1);
 648         gpgme_error_t err;
 649         gint i = 0;
 650
 651         while (fprs[i] && strlen(fprs[i])) {
 652                 i++;
 653         }
 654
 655         kset = g_malloc(sizeof(gpgme_key_t)*(i+1));
 656         memset(kset, 0, sizeof(gpgme_key_t)*(i+1));
 657         if ((err = gpgme_new(&ctx)) != GPG_ERR_NO_ERROR) {
 658                 debug_print(("Couldn't initialize GPG context, %s"), gpgme_strerror(err));
 659                 privacy_set_error(_("Couldn't initialize GPG context, %s"), gpgme_strerror(err));
 660                 g_free(kset);
 661                 return FALSE;
 662         }
 663         i = 0;
 664         while (fprs[i] && strlen(fprs[i])) {
 665                 gpgme_key_t key;
 666                 err = gpgme_get_key(ctx, fprs[i], &key, 0);
 667                 if (err) {
 668                         debug_print("can't add key '%s'[%d] (%s)\n", fprs[i],i, gpgme_strerror(err));
 669                         privacy_set_error(_("Couldn't add GPG key %s, %s"), fprs[i], gpgme_strerror(err));
 670                         g_free(kset);
 671                         return FALSE;
 672                 }
 673                 debug_print("found %s at %d\n", fprs[i], i);
 674                 kset[i] = key;
 675                 i++;
 676         }
 677
 678
 679         debug_print("Encrypting message content\n");
 680
 681         /* get content node from message */
 682         msgcontent = (MimeInfo *) mimeinfo->node->children->data;
 683         if (msgcontent->type == MIMETYPE_MULTIPART) {
 684                 if (!msgcontent->node->children) {
 685                         debug_print("msgcontent->node->children NULL, bailing\n");
 686                         privacy_set_error(_("Malformed message"));
 687                         g_free(kset);
 688                         return FALSE;
 689                 }
 690                 msgcontent = (MimeInfo *) msgcontent->node->children->data;
 691         }
 692         /* get rid of quoted-printable or anything */
 693         procmime_decode_content(msgcontent);
 694
 695         fp = my_tmpfile();
 696         if (fp == NULL) {
 697                 privacy_set_error(_("Couldn't create temporary file, %s"), g_strerror(errno));
 698                 perror("my_tmpfile");
 699                 g_free(kset);
 700                 return FALSE;
 701         }
 702         procmime_write_mimeinfo(msgcontent, fp);
 703         rewind(fp);
 704
 705         /* read temporary file into memory */
 706         textstr = fp_read_noconv(fp);
 707
 708         fclose(fp);
 709
 710         /* encrypt data */
 711         gpgme_data_new_from_mem(&gpgtext, textstr, (size_t)strlen(textstr), 0);
 712         gpgme_data_new(&gpgenc);
 713         if ((err = gpgme_new(&ctx)) != GPG_ERR_NO_ERROR) {
 714                 debug_print(("Couldn't initialize GPG context, %s"), gpgme_strerror(err));
 715                 privacy_set_error(_("Couldn't initialize GPG context, %s"), gpgme_strerror(err));
 716                 g_free(kset);
 717                 return FALSE;
 718         }
 719         gpgme_set_armor(ctx, 1);
 720
 721         err = gpgme_op_encrypt(ctx, kset, GPGME_ENCRYPT_ALWAYS_TRUST, gpgtext, gpgenc);
 722
 723         enccontent = sgpgme_data_release_and_get_mem(gpgenc, &len);
 724         g_free(kset);
 725
 726         if (enccontent == NULL || len <= 0) {
 727                 g_warning("sgpgme_data_release_and_get_mem failed");
 728                 privacy_set_error(_("Encryption failed, %s"), gpgme_strerror(err));
 729                 gpgme_data_release(gpgtext);
 730                 g_free(textstr);
 731                 gpgme_release(ctx);
 732                 g_free(enccontent);
 733                 return FALSE;
 734         }
 735
 736         tmp = g_malloc(len+1);
 737         g_memmove(tmp, enccontent, len+1);
 738         tmp[len] = '\0';
 739         g_free(enccontent);
 740
 741         gpgme_data_release(gpgtext);
 742         g_free(textstr);
 743
 744         if (msgcontent->content == MIMECONTENT_FILE &&
 745             msgcontent->data.filename != NULL) {
 746                 if (msgcontent->tmp == TRUE)
 747                         claws_unlink(msgcontent->data.filename);
 748                 g_free(msgcontent->data.filename);
 749         }
 750         msgcontent->data.mem = g_strdup(tmp);
 751         msgcontent->content = MIMECONTENT_MEM;
 752         g_free(tmp);
 753         gpgme_release(ctx);
 754
 755         return TRUE;
 756 }
 757
 758 static PrivacySystem pgpinline_system = {
 759         "pgpinline",                    /* id */
 760         "PGP Inline",                   /* name */
 761
 762         pgpinline_free_privacydata,     /* free_privacydata */
 763
 764         pgpinline_is_signed,            /* is_signed(MimeInfo *) */
 765         pgpinline_check_signature,      /* check_signature(MimeInfo *) */
 766         pgpinline_get_sig_status,       /* get_sig_status(MimeInfo *) */
 767         pgpinline_get_sig_info_short,   /* get_sig_info_short(MimeInfo *) */
 768         pgpinline_get_sig_info_full,    /* get_sig_info_full(MimeInfo *) */
 769
 770         pgpinline_is_encrypted,         /* is_encrypted(MimeInfo *) */
 771         pgpinline_decrypt,              /* decrypt(MimeInfo *) */
 772
 773         TRUE,
 774         pgpinline_sign,
 775
 776         TRUE,
 777         pgpinline_get_encrypt_data,
 778         pgpinline_encrypt,
 779         pgpinline_get_encrypt_warning,
 780         pgpinline_inhibit_encrypt_warning,
 781         prefs_gpg_auto_check_signatures,
 782 };
 783
 784 void pgpinline_init()
 785 {
 786         privacy_register_system(&pgpinline_system);
 787 }
 788
 789 void pgpinline_done()
 790 {
 791         privacy_unregister_system(&pgpinline_system);
 792 }
 793
 794 struct PluginFeature *plugin_provides(void)
 795 {
 796         static struct PluginFeature features[] =
 797                 { {PLUGIN_PRIVACY, N_("PGP/Inline")},
 798                   {PLUGIN_NOTHING, NULL}};
 799         return features;
 800 }
 801 #endif /* USE_GPGME */