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