2 * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
3 * Copyright (C) 1999-2006 Hiroyuki Yamamoto & the Sylpheed-Claws team
4 * This file (C) 2004 Colin Leroy <colin@colino.net>
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 2 of the License, or
9 * (at your option) any later version.
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.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
29 #include <glib/gi18n.h>
36 #include "pgpinline.h"
37 #include <plugins/pgpcore/sgpgme.h>
38 #include <plugins/pgpcore/prefs_gpg.h>
39 #include <plugins/pgpcore/passphrase.h>
40 #include "quoted-printable.h"
44 extern struct GPGConfig prefs_gpg;
46 typedef struct _PrivacyDataPGP PrivacyDataPGP;
48 struct _PrivacyDataPGP
52 gboolean done_sigtest;
54 gpgme_verify_result_t sigstatus;
58 static PrivacySystem pgpinline_system;
60 static gint pgpinline_check_signature(MimeInfo *mimeinfo);
62 static PrivacyDataPGP *pgpinline_new_privacydata()
66 data = g_new0(PrivacyDataPGP, 1);
67 data->data.system = &pgpinline_system;
68 data->done_sigtest = FALSE;
69 data->is_signed = FALSE;
70 data->sigstatus = NULL;
71 gpgme_new(&data->ctx);
76 static void pgpinline_free_privacydata(PrivacyData *_data)
78 PrivacyDataPGP *data = (PrivacyDataPGP *) _data;
79 gpgme_release(data->ctx);
83 static gchar *fp_read_noconv(FILE *fp)
92 array = g_byte_array_new();
94 while ((n_read = fread(buf, sizeof(gchar), sizeof(buf), fp)) > 0) {
95 if (n_read < sizeof(buf) && ferror(fp))
97 g_byte_array_append(array, buf, n_read);
101 FILE_OP_ERROR("file stream", "fread");
102 g_byte_array_free(array, TRUE);
107 g_byte_array_append(array, buf, 1);
108 result = (gchar *)array->data;
109 g_byte_array_free(array, FALSE);
114 static gchar *get_part_as_string(MimeInfo *mimeinfo)
116 gchar *textdata = NULL;
118 g_return_val_if_fail(mimeinfo != NULL, 0);
119 procmime_decode_content(mimeinfo);
120 if (mimeinfo->content == MIMECONTENT_MEM)
121 textdata = g_strdup(mimeinfo->data.mem);
123 /* equals file_read_to_str but without conversion */
124 FILE *fp = fopen(mimeinfo->data.filename, "r");
127 textdata = fp_read_noconv(fp);
131 if (!g_utf8_validate(textdata, -1, NULL)) {
133 codeconv_set_strict(TRUE);
134 if (procmime_mimeinfo_get_parameter(mimeinfo, "charset")) {
135 tmp = conv_codeset_strdup(textdata,
136 procmime_mimeinfo_get_parameter(mimeinfo, "charset"),
140 tmp = conv_codeset_strdup(textdata,
141 conv_get_locale_charset_str_no_utf8(),
144 codeconv_set_strict(FALSE);
146 tmp = conv_codeset_strdup(textdata,
147 conv_get_locale_charset_str_no_utf8(),
159 static gboolean pgpinline_is_signed(MimeInfo *mimeinfo)
161 PrivacyDataPGP *data = NULL;
162 const gchar *sig_indicator = "-----BEGIN PGP SIGNED MESSAGE-----";
163 gchar *textdata, *sigpos;
165 g_return_val_if_fail(mimeinfo != NULL, FALSE);
167 if (procmime_mimeinfo_parent(mimeinfo) == NULL)
168 return FALSE; /* not parent */
170 if (mimeinfo->type != MIMETYPE_TEXT &&
171 (mimeinfo->type != MIMETYPE_APPLICATION ||
172 g_ascii_strcasecmp(mimeinfo->subtype, "pgp")))
175 /* Seal the deal. This has to be text/plain through and through. */
176 if (mimeinfo->type == MIMETYPE_APPLICATION)
178 mimeinfo->type = MIMETYPE_TEXT;
179 g_free(mimeinfo->subtype);
180 mimeinfo->subtype = g_strdup("plain");
183 if (mimeinfo->privacy != NULL) {
184 data = (PrivacyDataPGP *) mimeinfo->privacy;
185 if (data->done_sigtest)
186 return data->is_signed;
189 textdata = get_part_as_string(mimeinfo);
193 if ((sigpos = strstr(textdata, sig_indicator)) == NULL) {
198 if (!(sigpos == textdata) && !(sigpos[-1] == '\n')) {
206 data = pgpinline_new_privacydata();
207 mimeinfo->privacy = (PrivacyData *) data;
209 data->done_sigtest = TRUE;
210 data->is_signed = TRUE;
215 static gint pgpinline_check_signature(MimeInfo *mimeinfo)
217 PrivacyDataPGP *data = NULL;
218 gchar *textdata = NULL, *tmp = NULL;
219 gpgme_data_t plain = NULL, cipher = NULL;
222 g_return_val_if_fail(mimeinfo != NULL, 0);
224 if (procmime_mimeinfo_parent(mimeinfo) == NULL)
225 return 0; /* not parent */
226 if (mimeinfo->type != MIMETYPE_TEXT)
229 g_return_val_if_fail(mimeinfo->privacy != NULL, 0);
230 data = (PrivacyDataPGP *) mimeinfo->privacy;
232 textdata = get_part_as_string(mimeinfo);
236 privacy_set_error(_("Couldn't get text data."));
240 /* gtk2: convert back from utf8 */
241 tmp = conv_codeset_strdup(textdata, CS_UTF_8,
242 procmime_mimeinfo_get_parameter(mimeinfo, "charset"));
244 tmp = conv_codeset_strdup(textdata, CS_UTF_8,
245 conv_get_locale_charset_str_no_utf8());
248 g_warning("Can't convert charset to anything sane\n");
249 tmp = conv_codeset_strdup(textdata, CS_UTF_8, CS_US_ASCII);
254 privacy_set_error(_("Couldn't convert text data to any sane charset."));
257 textdata = g_strdup(tmp);
261 gpgme_set_textmode(ctx, 1);
262 gpgme_set_armor(ctx, 1);
264 gpgme_data_new_from_mem(&plain, textdata, strlen(textdata), 1);
265 gpgme_data_new(&cipher);
267 data->sigstatus = sgpgme_verify_signature(ctx, plain, NULL, cipher);
269 gpgme_data_release(plain);
270 gpgme_data_release(cipher);
277 static SignatureStatus pgpinline_get_sig_status(MimeInfo *mimeinfo)
279 PrivacyDataPGP *data = (PrivacyDataPGP *) mimeinfo->privacy;
281 g_return_val_if_fail(data != NULL, SIGNATURE_INVALID);
283 if (data->sigstatus == NULL &&
284 prefs_gpg_get_config()->auto_check_signatures)
285 pgpinline_check_signature(mimeinfo);
287 return sgpgme_sigstat_gpgme_to_privacy(data->ctx, data->sigstatus);
290 static gchar *pgpinline_get_sig_info_short(MimeInfo *mimeinfo)
292 PrivacyDataPGP *data = (PrivacyDataPGP *) mimeinfo->privacy;
294 g_return_val_if_fail(data != NULL, g_strdup("Error"));
296 if (data->sigstatus == NULL &&
297 prefs_gpg_get_config()->auto_check_signatures)
298 pgpinline_check_signature(mimeinfo);
300 return sgpgme_sigstat_info_short(data->ctx, data->sigstatus);
303 static gchar *pgpinline_get_sig_info_full(MimeInfo *mimeinfo)
305 PrivacyDataPGP *data = (PrivacyDataPGP *) mimeinfo->privacy;
307 g_return_val_if_fail(data != NULL, g_strdup("Error"));
309 return sgpgme_sigstat_info_full(data->ctx, data->sigstatus);
314 static gboolean pgpinline_is_encrypted(MimeInfo *mimeinfo)
316 const gchar *enc_indicator = "-----BEGIN PGP MESSAGE-----";
319 g_return_val_if_fail(mimeinfo != NULL, FALSE);
321 if (procmime_mimeinfo_parent(mimeinfo) == NULL)
322 return FALSE; /* not parent */
324 if (mimeinfo->type != MIMETYPE_TEXT &&
325 (mimeinfo->type != MIMETYPE_APPLICATION ||
326 g_ascii_strcasecmp(mimeinfo->subtype, "pgp")))
329 /* Seal the deal. This has to be text/plain through and through. */
330 if (mimeinfo->type == MIMETYPE_APPLICATION)
332 mimeinfo->type = MIMETYPE_TEXT;
333 g_free(mimeinfo->subtype);
334 mimeinfo->subtype = g_strdup("plain");
337 textdata = get_part_as_string(mimeinfo);
341 if (!strstr(textdata, enc_indicator)) {
350 static MimeInfo *pgpinline_decrypt(MimeInfo *mimeinfo)
352 MimeInfo *decinfo, *parseinfo;
353 gpgme_data_t cipher, plain;
356 gchar *textdata = NULL;
358 const gchar *src_codeset = NULL;
359 gpgme_verify_result_t sigstat = 0;
360 PrivacyDataPGP *data = NULL;
365 if (gpgme_new(&ctx) != GPG_ERR_NO_ERROR)
368 gpgme_set_textmode(ctx, 1);
369 gpgme_set_armor(ctx, 1);
371 g_return_val_if_fail(mimeinfo != NULL, NULL);
372 g_return_val_if_fail(pgpinline_is_encrypted(mimeinfo), NULL);
374 if (procmime_mimeinfo_parent(mimeinfo) == NULL ||
375 mimeinfo->type != MIMETYPE_TEXT) {
377 privacy_set_error(_("Couldn't parse mime part."));
381 textdata = get_part_as_string(mimeinfo);
384 privacy_set_error(_("Couldn't get text data."));
388 debug_print("decrypting '%s'\n", textdata);
389 gpgme_data_new_from_mem(&cipher, textdata, strlen(textdata), 1);
391 plain = sgpgme_decrypt_verify(cipher, &sigstat, ctx);
392 if (sigstat && !sigstat->signatures)
395 gpgme_data_release(cipher);
402 fname = g_strdup_printf("%s%cplaintext.%08x",
403 get_mime_tmp_dir(), G_DIR_SEPARATOR, ++id);
405 if ((dstfp = g_fopen(fname, "wb")) == NULL) {
406 FILE_OP_ERROR(fname, "fopen");
407 privacy_set_error(_("Couldn't open decrypted file %s"), fname);
409 gpgme_data_release(plain);
414 src_codeset = procmime_mimeinfo_get_parameter(mimeinfo, "charset");
415 if (src_codeset == NULL)
416 src_codeset = CS_ISO_8859_1;
418 fprintf(dstfp, "MIME-Version: 1.0\r\n"
419 "Content-Type: text/plain; charset=%s\r\n"
420 "Content-Transfer-Encoding: 8bit\r\n"
424 chars = gpgme_data_release_and_get_mem(plain, &len);
426 fwrite(chars, len, 1, dstfp);
430 gpgme_data_release(plain);
432 parseinfo = procmime_scan_file(fname);
435 if (parseinfo == NULL) {
437 privacy_set_error(_("Couldn't scan decrypted file."));
440 decinfo = g_node_first_child(parseinfo->node) != NULL ?
441 g_node_first_child(parseinfo->node)->data : NULL;
443 if (decinfo == NULL) {
445 privacy_set_error(_("Couldn't scan decrypted file parts."));
449 g_node_unlink(decinfo->node);
450 procmime_mimeinfo_free_all(parseinfo);
454 if (sigstat != GPGME_SIG_STAT_NONE) {
455 if (decinfo->privacy != NULL) {
456 data = (PrivacyDataPGP *) decinfo->privacy;
458 data = pgpinline_new_privacydata();
459 decinfo->privacy = (PrivacyData *) data;
461 data->done_sigtest = TRUE;
462 data->is_signed = TRUE;
463 data->sigstatus = sigstat;
465 gpgme_release(data->ctx);
473 static gboolean pgpinline_sign(MimeInfo *mimeinfo, PrefsAccount *account)
475 MimeInfo *msgcontent;
476 gchar *textstr, *tmp;
480 gpgme_data_t gpgtext, gpgsig;
483 struct passphrase_cb_info_s info;
484 gpgme_sign_result_t result = NULL;
486 memset (&info, 0, sizeof info);
488 /* get content node from message */
489 msgcontent = (MimeInfo *) mimeinfo->node->children->data;
490 if (msgcontent->type == MIMETYPE_MULTIPART)
491 msgcontent = (MimeInfo *) msgcontent->node->children->data;
493 /* get rid of quoted-printable or anything */
494 procmime_decode_content(msgcontent);
498 perror("my_tmpfile");
499 privacy_set_error(_("Couldn't create temporary file."));
502 procmime_write_mimeinfo(msgcontent, fp);
505 /* read temporary file into memory */
506 textstr = fp_read_noconv(fp);
510 gpgme_data_new_from_mem(&gpgtext, textstr, strlen(textstr), 0);
511 gpgme_data_new(&gpgsig);
513 gpgme_set_textmode(ctx, 1);
514 gpgme_set_armor(ctx, 1);
516 if (!sgpgme_setup_signers(ctx, account)) {
521 if (!getenv("GPG_AGENT_INFO")) {
523 gpgme_set_passphrase_cb (ctx, gpgmegtk_passphrase_cb, &info);
526 err = gpgme_op_sign(ctx, gpgtext, gpgsig, GPGME_SIG_MODE_CLEAR);
527 if (err != GPG_ERR_NO_ERROR) {
528 if (err == GPG_ERR_CANCELED) {
529 /* ignore cancelled signing */
530 privacy_reset_error();
531 debug_print("gpgme_op_sign cancelled\n");
533 privacy_set_error(_("Data signing failed, %s"), gpgme_strerror(err));
534 debug_print("gpgme_op_sign error : %x\n", err);
539 result = gpgme_op_sign_result(ctx);
540 if (result && result->signatures) {
541 gpgme_new_signature_t sig = result->signatures;
543 debug_print("valid signature: %s\n", sig->fpr);
546 } else if (result && result->invalid_signers) {
547 gpgme_invalid_key_t invalid = result->invalid_signers;
549 g_warning("invalid signer: %s (%s)", invalid->fpr,
550 gpgme_strerror(invalid->reason));
551 privacy_set_error(_("Data signing failed due to invalid signer: %s"),
552 gpgme_strerror(invalid->reason));
553 invalid = invalid->next;
558 /* can't get result (maybe no signing key?) */
559 debug_print("gpgme_op_sign_result error\n");
560 privacy_set_error(_("Data signing failed, no results."));
566 sigcontent = gpgme_data_release_and_get_mem(gpgsig, &len);
570 if (sigcontent == NULL || len <= 0) {
571 g_warning("gpgme_data_release_and_get_mem failed");
572 privacy_set_error(_("Data signing failed, no contents."));
573 gpgme_data_release(gpgtext);
579 tmp = g_malloc(len+1);
580 g_memmove(tmp, sigcontent, len+1);
582 gpgme_data_release(gpgtext);
586 if (msgcontent->content == MIMECONTENT_FILE &&
587 msgcontent->data.filename != NULL) {
588 if (msgcontent->tmp == TRUE)
589 g_unlink(msgcontent->data.filename);
590 g_free(msgcontent->data.filename);
592 msgcontent->data.mem = g_strdup(tmp);
593 msgcontent->content = MIMECONTENT_MEM;
596 /* avoid all sorts of clear-signing problems with non ascii
599 procmime_encode_content(msgcontent, ENC_BASE64);
604 static gchar *pgpinline_get_encrypt_data(GSList *recp_names)
606 return sgpgme_get_encrypt_data(recp_names, GPGME_PROTOCOL_OpenPGP);
609 static gboolean pgpinline_encrypt(MimeInfo *mimeinfo, const gchar *encrypt_data)
611 MimeInfo *msgcontent;
615 gchar *textstr, *tmp;
616 gpgme_data_t gpgtext, gpgenc;
618 gpgme_key_t *kset = NULL;
619 gchar **fprs = g_strsplit(encrypt_data, " ", -1);
623 while (fprs[i] && strlen(fprs[i])) {
627 kset = g_malloc(sizeof(gpgme_key_t)*(i+1));
628 memset(kset, 0, sizeof(gpgme_key_t)*(i+1));
631 while (fprs[i] && strlen(fprs[i])) {
633 err = gpgme_get_key(ctx, fprs[i], &key, 0);
635 debug_print("can't add key '%s'[%d] (%s)\n", fprs[i],i, gpgme_strerror(err));
636 privacy_set_error(_("Couldn't add GPG key %s, %s"), fprs[i], gpgme_strerror(err));
639 debug_print("found %s at %d\n", fprs[i], i);
645 debug_print("Encrypting message content\n");
647 /* get content node from message */
648 msgcontent = (MimeInfo *) mimeinfo->node->children->data;
649 if (msgcontent->type == MIMETYPE_MULTIPART)
650 msgcontent = (MimeInfo *) msgcontent->node->children->data;
652 /* get rid of quoted-printable or anything */
653 procmime_decode_content(msgcontent);
657 privacy_set_error(_("Couldn't create temporary file, %s"), strerror(errno));
658 perror("my_tmpfile");
661 procmime_write_mimeinfo(msgcontent, fp);
664 /* read temporary file into memory */
665 textstr = fp_read_noconv(fp);
670 gpgme_data_new_from_mem(&gpgtext, textstr, strlen(textstr), 0);
671 gpgme_data_new(&gpgenc);
673 gpgme_set_armor(ctx, 1);
675 err = gpgme_op_encrypt(ctx, kset, GPGME_ENCRYPT_ALWAYS_TRUST, gpgtext, gpgenc);
678 enccontent = gpgme_data_release_and_get_mem(gpgenc, &len);
680 if (enccontent == NULL || len <= 0) {
681 g_warning("gpgme_data_release_and_get_mem failed");
682 privacy_set_error(_("Encryption failed, %s"), gpgme_strerror(err));
683 gpgme_data_release(gpgtext);
688 tmp = g_malloc(len+1);
689 g_memmove(tmp, enccontent, len+1);
693 gpgme_data_release(gpgtext);
696 if (msgcontent->content == MIMECONTENT_FILE &&
697 msgcontent->data.filename != NULL) {
698 if (msgcontent->tmp == TRUE)
699 g_unlink(msgcontent->data.filename);
700 g_free(msgcontent->data.filename);
702 msgcontent->data.mem = g_strdup(tmp);
703 msgcontent->content = MIMECONTENT_MEM;
709 static PrivacySystem pgpinline_system = {
710 "pgpinline", /* id */
711 "PGP Inline", /* name */
713 pgpinline_free_privacydata, /* free_privacydata */
715 pgpinline_is_signed, /* is_signed(MimeInfo *) */
716 pgpinline_check_signature, /* check_signature(MimeInfo *) */
717 pgpinline_get_sig_status, /* get_sig_status(MimeInfo *) */
718 pgpinline_get_sig_info_short, /* get_sig_info_short(MimeInfo *) */
719 pgpinline_get_sig_info_full, /* get_sig_info_full(MimeInfo *) */
721 pgpinline_is_encrypted, /* is_encrypted(MimeInfo *) */
722 pgpinline_decrypt, /* decrypt(MimeInfo *) */
728 pgpinline_get_encrypt_data,
732 void pgpinline_init()
734 privacy_register_system(&pgpinline_system);
737 void pgpinline_done()
739 privacy_unregister_system(&pgpinline_system);
742 #endif /* USE_GPGME */