2 * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
3 * Copyright (C) 1999-2007 Hiroyuki Yamamoto & the Claws Mail 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"
45 extern struct GPGConfig prefs_gpg;
47 typedef struct _PrivacyDataPGP PrivacyDataPGP;
49 struct _PrivacyDataPGP
53 gboolean done_sigtest;
55 gpgme_verify_result_t sigstatus;
59 static PrivacySystem pgpinline_system;
61 static gint pgpinline_check_signature(MimeInfo *mimeinfo);
63 static PrivacyDataPGP *pgpinline_new_privacydata()
68 data = g_new0(PrivacyDataPGP, 1);
69 data->data.system = &pgpinline_system;
70 data->done_sigtest = FALSE;
71 data->is_signed = FALSE;
72 data->sigstatus = NULL;
73 if ((err = gpgme_new(&data->ctx)) != GPG_ERR_NO_ERROR) {
74 debug_print(("Couldn't initialize GPG context, %s"), gpgme_strerror(err));
81 static void pgpinline_free_privacydata(PrivacyData *_data)
83 PrivacyDataPGP *data = (PrivacyDataPGP *) _data;
84 gpgme_release(data->ctx);
88 static gchar *fp_read_noconv(FILE *fp)
97 array = g_byte_array_new();
99 while ((n_read = fread(buf, sizeof(gchar), sizeof(buf), fp)) > 0) {
100 if (n_read < sizeof(buf) && ferror(fp))
102 g_byte_array_append(array, buf, n_read);
106 FILE_OP_ERROR("file stream", "fread");
107 g_byte_array_free(array, TRUE);
112 g_byte_array_append(array, buf, 1);
113 result = (gchar *)array->data;
114 g_byte_array_free(array, FALSE);
119 static gchar *get_part_as_string(MimeInfo *mimeinfo)
121 gchar *textdata = NULL;
123 g_return_val_if_fail(mimeinfo != NULL, 0);
124 procmime_decode_content(mimeinfo);
125 if (mimeinfo->content == MIMECONTENT_MEM)
126 textdata = g_strdup(mimeinfo->data.mem);
128 /* equals file_read_to_str but without conversion */
129 FILE *fp = fopen(mimeinfo->data.filename, "r");
132 textdata = fp_read_noconv(fp);
136 if (!g_utf8_validate(textdata, -1, NULL)) {
138 codeconv_set_strict(TRUE);
139 if (procmime_mimeinfo_get_parameter(mimeinfo, "charset")) {
140 tmp = conv_codeset_strdup(textdata,
141 procmime_mimeinfo_get_parameter(mimeinfo, "charset"),
145 tmp = conv_codeset_strdup(textdata,
146 conv_get_locale_charset_str_no_utf8(),
149 codeconv_set_strict(FALSE);
151 tmp = conv_codeset_strdup(textdata,
152 conv_get_locale_charset_str_no_utf8(),
164 static gboolean pgpinline_is_signed(MimeInfo *mimeinfo)
166 PrivacyDataPGP *data = NULL;
167 const gchar *sig_indicator = "-----BEGIN PGP SIGNED MESSAGE-----";
168 gchar *textdata, *sigpos;
170 g_return_val_if_fail(mimeinfo != NULL, FALSE);
172 if (procmime_mimeinfo_parent(mimeinfo) == NULL)
173 return FALSE; /* not parent */
175 if (mimeinfo->type != MIMETYPE_TEXT &&
176 (mimeinfo->type != MIMETYPE_APPLICATION ||
177 g_ascii_strcasecmp(mimeinfo->subtype, "pgp")))
180 /* Seal the deal. This has to be text/plain through and through. */
181 if (mimeinfo->type == MIMETYPE_APPLICATION)
183 mimeinfo->type = MIMETYPE_TEXT;
184 g_free(mimeinfo->subtype);
185 mimeinfo->subtype = g_strdup("plain");
188 if (mimeinfo->privacy != NULL) {
189 data = (PrivacyDataPGP *) mimeinfo->privacy;
190 if (data->done_sigtest)
191 return data->is_signed;
194 textdata = get_part_as_string(mimeinfo);
198 if ((sigpos = strstr(textdata, sig_indicator)) == NULL) {
203 if (!(sigpos == textdata) && !(sigpos[-1] == '\n')) {
211 data = pgpinline_new_privacydata();
212 mimeinfo->privacy = (PrivacyData *) data;
214 data->done_sigtest = TRUE;
215 data->is_signed = TRUE;
220 static gint pgpinline_check_signature(MimeInfo *mimeinfo)
222 PrivacyDataPGP *data = NULL;
223 gchar *textdata = NULL, *tmp = NULL;
224 gpgme_data_t plain = NULL, cipher = NULL;
227 g_return_val_if_fail(mimeinfo != NULL, 0);
229 if (procmime_mimeinfo_parent(mimeinfo) == NULL)
230 return 0; /* not parent */
231 if (mimeinfo->type != MIMETYPE_TEXT)
234 g_return_val_if_fail(mimeinfo->privacy != NULL, 0);
235 data = (PrivacyDataPGP *) mimeinfo->privacy;
237 textdata = get_part_as_string(mimeinfo);
241 privacy_set_error(_("Couldn't get text data."));
245 /* gtk2: convert back from utf8 */
246 tmp = conv_codeset_strdup(textdata, CS_UTF_8,
247 procmime_mimeinfo_get_parameter(mimeinfo, "charset"));
249 tmp = conv_codeset_strdup(textdata, CS_UTF_8,
250 conv_get_locale_charset_str_no_utf8());
253 g_warning("Can't convert charset to anything sane\n");
254 tmp = conv_codeset_strdup(textdata, CS_UTF_8, CS_US_ASCII);
259 privacy_set_error(_("Couldn't convert text data to any sane charset."));
262 textdata = g_strdup(tmp);
265 if ((err = gpgme_new(&data->ctx)) != GPG_ERR_NO_ERROR) {
266 debug_print(("Couldn't initialize GPG context, %s"), gpgme_strerror(err));
267 privacy_set_error(_("Couldn't initialize GPG context, %s"), gpgme_strerror(err));
270 gpgme_set_textmode(data->ctx, 1);
271 gpgme_set_armor(data->ctx, 1);
273 gpgme_data_new_from_mem(&plain, textdata, (size_t)strlen(textdata), 1);
274 gpgme_data_new(&cipher);
276 data->sigstatus = sgpgme_verify_signature(data->ctx, plain, NULL, cipher);
278 gpgme_data_release(plain);
279 gpgme_data_release(cipher);
286 static SignatureStatus pgpinline_get_sig_status(MimeInfo *mimeinfo)
288 PrivacyDataPGP *data = (PrivacyDataPGP *) mimeinfo->privacy;
290 g_return_val_if_fail(data != NULL, SIGNATURE_INVALID);
292 if (data->sigstatus == NULL &&
293 prefs_gpg_get_config()->auto_check_signatures)
294 pgpinline_check_signature(mimeinfo);
296 return sgpgme_sigstat_gpgme_to_privacy(data->ctx, data->sigstatus);
299 static gchar *pgpinline_get_sig_info_short(MimeInfo *mimeinfo)
301 PrivacyDataPGP *data = (PrivacyDataPGP *) mimeinfo->privacy;
303 g_return_val_if_fail(data != NULL, g_strdup("Error"));
305 if (data->sigstatus == NULL &&
306 prefs_gpg_get_config()->auto_check_signatures)
307 pgpinline_check_signature(mimeinfo);
309 return sgpgme_sigstat_info_short(data->ctx, data->sigstatus);
312 static gchar *pgpinline_get_sig_info_full(MimeInfo *mimeinfo)
314 PrivacyDataPGP *data = (PrivacyDataPGP *) mimeinfo->privacy;
316 g_return_val_if_fail(data != NULL, g_strdup("Error"));
318 return sgpgme_sigstat_info_full(data->ctx, data->sigstatus);
323 static gboolean pgpinline_is_encrypted(MimeInfo *mimeinfo)
325 const gchar *enc_indicator = "-----BEGIN PGP MESSAGE-----";
328 g_return_val_if_fail(mimeinfo != NULL, FALSE);
330 if (procmime_mimeinfo_parent(mimeinfo) == NULL)
331 return FALSE; /* not parent */
333 if (mimeinfo->type != MIMETYPE_TEXT &&
334 (mimeinfo->type != MIMETYPE_APPLICATION ||
335 g_ascii_strcasecmp(mimeinfo->subtype, "pgp")))
338 /* Seal the deal. This has to be text/plain through and through. */
339 if (mimeinfo->type == MIMETYPE_APPLICATION)
341 mimeinfo->type = MIMETYPE_TEXT;
342 g_free(mimeinfo->subtype);
343 mimeinfo->subtype = g_strdup("plain");
346 textdata = get_part_as_string(mimeinfo);
350 if (!strstr(textdata, enc_indicator)) {
359 static MimeInfo *pgpinline_decrypt(MimeInfo *mimeinfo)
361 MimeInfo *decinfo, *parseinfo;
362 gpgme_data_t cipher, plain;
365 gchar *textdata = NULL;
367 const gchar *src_codeset = NULL;
368 gpgme_verify_result_t sigstat = 0;
369 PrivacyDataPGP *data = NULL;
374 if (gpgme_new(&ctx) != GPG_ERR_NO_ERROR)
377 gpgme_set_textmode(ctx, 1);
378 gpgme_set_armor(ctx, 1);
380 g_return_val_if_fail(mimeinfo != NULL, NULL);
381 g_return_val_if_fail(pgpinline_is_encrypted(mimeinfo), NULL);
383 if (procmime_mimeinfo_parent(mimeinfo) == NULL ||
384 mimeinfo->type != MIMETYPE_TEXT) {
386 privacy_set_error(_("Couldn't parse mime part."));
390 textdata = get_part_as_string(mimeinfo);
393 privacy_set_error(_("Couldn't get text data."));
397 debug_print("decrypting '%s'\n", textdata);
398 gpgme_data_new_from_mem(&cipher, textdata, (size_t)strlen(textdata), 1);
400 plain = sgpgme_decrypt_verify(cipher, &sigstat, ctx);
401 if (sigstat && !sigstat->signatures)
404 gpgme_data_release(cipher);
411 fname = g_strdup_printf("%s%cplaintext.%08x",
412 get_mime_tmp_dir(), G_DIR_SEPARATOR, ++id);
414 if ((dstfp = g_fopen(fname, "wb")) == NULL) {
415 FILE_OP_ERROR(fname, "fopen");
416 privacy_set_error(_("Couldn't open decrypted file %s"), fname);
418 gpgme_data_release(plain);
423 src_codeset = procmime_mimeinfo_get_parameter(mimeinfo, "charset");
424 if (src_codeset == NULL)
425 src_codeset = CS_ISO_8859_1;
427 fprintf(dstfp, "MIME-Version: 1.0\r\n"
428 "Content-Type: text/plain; charset=%s\r\n"
429 "Content-Transfer-Encoding: 8bit\r\n"
433 chars = gpgme_data_release_and_get_mem(plain, &len);
435 fwrite(chars, len, 1, dstfp);
439 gpgme_data_release(plain);
441 parseinfo = procmime_scan_file(fname);
444 if (parseinfo == NULL) {
446 privacy_set_error(_("Couldn't scan decrypted file."));
449 decinfo = g_node_first_child(parseinfo->node) != NULL ?
450 g_node_first_child(parseinfo->node)->data : NULL;
452 if (decinfo == NULL) {
454 privacy_set_error(_("Couldn't scan decrypted file parts."));
458 g_node_unlink(decinfo->node);
459 procmime_mimeinfo_free_all(parseinfo);
463 if (sigstat != GPGME_SIG_STAT_NONE) {
464 if (decinfo->privacy != NULL) {
465 data = (PrivacyDataPGP *) decinfo->privacy;
467 data = pgpinline_new_privacydata();
468 decinfo->privacy = (PrivacyData *) data;
470 data->done_sigtest = TRUE;
471 data->is_signed = TRUE;
472 data->sigstatus = sigstat;
474 gpgme_release(data->ctx);
482 static gboolean pgpinline_sign(MimeInfo *mimeinfo, PrefsAccount *account)
484 MimeInfo *msgcontent;
485 gchar *textstr, *tmp;
489 gpgme_data_t gpgtext, gpgsig;
492 struct passphrase_cb_info_s info;
493 gpgme_sign_result_t result = NULL;
495 memset (&info, 0, sizeof info);
497 /* get content node from message */
498 msgcontent = (MimeInfo *) mimeinfo->node->children->data;
499 if (msgcontent->type == MIMETYPE_MULTIPART)
500 msgcontent = (MimeInfo *) msgcontent->node->children->data;
502 /* get rid of quoted-printable or anything */
503 procmime_decode_content(msgcontent);
507 perror("my_tmpfile");
508 privacy_set_error(_("Couldn't create temporary file."));
511 procmime_write_mimeinfo(msgcontent, fp);
514 /* read temporary file into memory */
515 textstr = fp_read_noconv(fp);
519 gpgme_data_new_from_mem(&gpgtext, textstr, (size_t)strlen(textstr), 0);
520 gpgme_data_new(&gpgsig);
521 if ((err = gpgme_new(&ctx)) != GPG_ERR_NO_ERROR) {
522 debug_print(("Couldn't initialize GPG context, %s"), gpgme_strerror(err));
523 privacy_set_error(_("Couldn't initialize GPG context, %s"), gpgme_strerror(err));
526 gpgme_set_textmode(ctx, 1);
527 gpgme_set_armor(ctx, 1);
529 if (!sgpgme_setup_signers(ctx, account)) {
534 if (!getenv("GPG_AGENT_INFO")) {
536 gpgme_set_passphrase_cb (ctx, gpgmegtk_passphrase_cb, &info);
539 err = gpgme_op_sign(ctx, gpgtext, gpgsig, GPGME_SIG_MODE_CLEAR);
540 if (err != GPG_ERR_NO_ERROR) {
541 if (err == GPG_ERR_CANCELED) {
542 /* ignore cancelled signing */
543 privacy_reset_error();
544 debug_print("gpgme_op_sign cancelled\n");
546 privacy_set_error(_("Data signing failed, %s"), gpgme_strerror(err));
547 debug_print("gpgme_op_sign error : %x\n", err);
552 result = gpgme_op_sign_result(ctx);
553 if (result && result->signatures) {
554 gpgme_new_signature_t sig = result->signatures;
556 debug_print("valid signature: %s\n", sig->fpr);
559 } else if (result && result->invalid_signers) {
560 gpgme_invalid_key_t invalid = result->invalid_signers;
562 g_warning("invalid signer: %s (%s)", invalid->fpr,
563 gpgme_strerror(invalid->reason));
564 privacy_set_error(_("Data signing failed due to invalid signer: %s"),
565 gpgme_strerror(invalid->reason));
566 invalid = invalid->next;
571 /* can't get result (maybe no signing key?) */
572 debug_print("gpgme_op_sign_result error\n");
573 privacy_set_error(_("Data signing failed, no results."));
579 sigcontent = gpgme_data_release_and_get_mem(gpgsig, &len);
581 if (sigcontent == NULL || len <= 0) {
582 g_warning("gpgme_data_release_and_get_mem failed");
583 privacy_set_error(_("Data signing failed, no contents."));
584 gpgme_data_release(gpgtext);
591 tmp = g_malloc(len+1);
592 g_memmove(tmp, sigcontent, len+1);
594 gpgme_data_release(gpgtext);
598 if (msgcontent->content == MIMECONTENT_FILE &&
599 msgcontent->data.filename != NULL) {
600 if (msgcontent->tmp == TRUE)
601 g_unlink(msgcontent->data.filename);
602 g_free(msgcontent->data.filename);
604 msgcontent->data.mem = g_strdup(tmp);
605 msgcontent->content = MIMECONTENT_MEM;
608 /* avoid all sorts of clear-signing problems with non ascii
611 procmime_encode_content(msgcontent, ENC_BASE64);
617 static gchar *pgpinline_get_encrypt_data(GSList *recp_names)
619 return sgpgme_get_encrypt_data(recp_names, GPGME_PROTOCOL_OpenPGP);
622 static gboolean pgpinline_encrypt(MimeInfo *mimeinfo, const gchar *encrypt_data)
624 MimeInfo *msgcontent;
628 gchar *textstr, *tmp;
629 gpgme_data_t gpgtext, gpgenc;
631 gpgme_key_t *kset = NULL;
632 gchar **fprs = g_strsplit(encrypt_data, " ", -1);
636 while (fprs[i] && strlen(fprs[i])) {
640 kset = g_malloc(sizeof(gpgme_key_t)*(i+1));
641 memset(kset, 0, sizeof(gpgme_key_t)*(i+1));
642 if ((err = gpgme_new(&ctx)) != GPG_ERR_NO_ERROR) {
643 debug_print(("Couldn't initialize GPG context, %s"), gpgme_strerror(err));
644 privacy_set_error(_("Couldn't initialize GPG context, %s"), gpgme_strerror(err));
648 while (fprs[i] && strlen(fprs[i])) {
650 err = gpgme_get_key(ctx, fprs[i], &key, 0);
652 debug_print("can't add key '%s'[%d] (%s)\n", fprs[i],i, gpgme_strerror(err));
653 privacy_set_error(_("Couldn't add GPG key %s, %s"), fprs[i], gpgme_strerror(err));
656 debug_print("found %s at %d\n", fprs[i], i);
662 debug_print("Encrypting message content\n");
664 /* get content node from message */
665 msgcontent = (MimeInfo *) mimeinfo->node->children->data;
666 if (msgcontent->type == MIMETYPE_MULTIPART)
667 msgcontent = (MimeInfo *) msgcontent->node->children->data;
669 /* get rid of quoted-printable or anything */
670 procmime_decode_content(msgcontent);
674 privacy_set_error(_("Couldn't create temporary file, %s"), strerror(errno));
675 perror("my_tmpfile");
678 procmime_write_mimeinfo(msgcontent, fp);
681 /* read temporary file into memory */
682 textstr = fp_read_noconv(fp);
687 gpgme_data_new_from_mem(&gpgtext, textstr, (size_t)strlen(textstr), 0);
688 gpgme_data_new(&gpgenc);
689 if ((err = gpgme_new(&ctx)) != GPG_ERR_NO_ERROR) {
690 debug_print(("Couldn't initialize GPG context, %s"), gpgme_strerror(err));
691 privacy_set_error(_("Couldn't initialize GPG context, %s"), gpgme_strerror(err));
694 gpgme_set_armor(ctx, 1);
696 err = gpgme_op_encrypt(ctx, kset, GPGME_ENCRYPT_ALWAYS_TRUST, gpgtext, gpgenc);
698 enccontent = gpgme_data_release_and_get_mem(gpgenc, &len);
700 if (enccontent == NULL || len <= 0) {
701 g_warning("gpgme_data_release_and_get_mem failed");
702 privacy_set_error(_("Encryption failed, %s"), gpgme_strerror(err));
703 gpgme_data_release(gpgtext);
709 tmp = g_malloc(len+1);
710 g_memmove(tmp, enccontent, len+1);
714 gpgme_data_release(gpgtext);
717 if (msgcontent->content == MIMECONTENT_FILE &&
718 msgcontent->data.filename != NULL) {
719 if (msgcontent->tmp == TRUE)
720 g_unlink(msgcontent->data.filename);
721 g_free(msgcontent->data.filename);
723 msgcontent->data.mem = g_strdup(tmp);
724 msgcontent->content = MIMECONTENT_MEM;
731 static PrivacySystem pgpinline_system = {
732 "pgpinline", /* id */
733 "PGP Inline", /* name */
735 pgpinline_free_privacydata, /* free_privacydata */
737 pgpinline_is_signed, /* is_signed(MimeInfo *) */
738 pgpinline_check_signature, /* check_signature(MimeInfo *) */
739 pgpinline_get_sig_status, /* get_sig_status(MimeInfo *) */
740 pgpinline_get_sig_info_short, /* get_sig_info_short(MimeInfo *) */
741 pgpinline_get_sig_info_full, /* get_sig_info_full(MimeInfo *) */
743 pgpinline_is_encrypted, /* is_encrypted(MimeInfo *) */
744 pgpinline_decrypt, /* decrypt(MimeInfo *) */
750 pgpinline_get_encrypt_data,
754 void pgpinline_init()
756 privacy_register_system(&pgpinline_system);
759 void pgpinline_done()
761 privacy_unregister_system(&pgpinline_system);
764 struct PluginFeature *plugin_provides(void)
766 static struct PluginFeature features[] =
767 { {PLUGIN_PRIVACY, N_("PGP/Inline")},
768 {PLUGIN_NOTHING, NULL}};
771 #endif /* USE_GPGME */