2 * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
3 * Copyright (C) 1999-2003 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
34 #include "pgpinline.h"
35 #include <plugins/pgpcore/sgpgme.h>
36 #include <plugins/pgpcore/prefs_gpg.h>
37 #include <plugins/pgpcore/passphrase.h>
38 #include "quoted-printable.h"
42 extern struct GPGConfig prefs_gpg;
44 typedef struct _PrivacyDataPGP PrivacyDataPGP;
46 struct _PrivacyDataPGP
50 gboolean done_sigtest;
52 gpgme_verify_result_t sigstatus;
56 static PrivacySystem pgpinline_system;
58 static gint pgpinline_check_signature(MimeInfo *mimeinfo);
60 static PrivacyDataPGP *pgpinline_new_privacydata()
64 data = g_new0(PrivacyDataPGP, 1);
65 data->data.system = &pgpinline_system;
66 data->done_sigtest = FALSE;
67 data->is_signed = FALSE;
68 data->sigstatus = NULL;
69 gpgme_new(&data->ctx);
74 static void pgpinline_free_privacydata(PrivacyData *_data)
76 PrivacyDataPGP *data = (PrivacyDataPGP *) _data;
77 gpgme_release(data->ctx);
81 static gchar *get_part_as_string(MimeInfo *mimeinfo)
83 gchar *textdata = NULL;
85 g_return_val_if_fail(mimeinfo != NULL, 0);
86 procmime_decode_content(mimeinfo);
87 if (mimeinfo->content == MIMECONTENT_MEM)
88 textdata = g_strdup(mimeinfo->data.mem);
90 textdata = file_read_to_str(mimeinfo->data.filename);
95 static gboolean pgpinline_is_signed(MimeInfo *mimeinfo)
97 PrivacyDataPGP *data = NULL;
98 const gchar *sig_indicator = "-----BEGIN PGP SIGNED MESSAGE-----";
99 gchar *textdata, *sigpos;
101 g_return_val_if_fail(mimeinfo != NULL, FALSE);
103 if (procmime_mimeinfo_parent(mimeinfo) == NULL)
104 return FALSE; /* not parent */
106 if (mimeinfo->type != MIMETYPE_TEXT)
109 if (mimeinfo->privacy != NULL) {
110 data = (PrivacyDataPGP *) mimeinfo->privacy;
111 if (data->done_sigtest)
112 return data->is_signed;
115 textdata = get_part_as_string(mimeinfo);
120 data = pgpinline_new_privacydata();
121 mimeinfo->privacy = (PrivacyData *) data;
123 data->done_sigtest = TRUE;
124 data->is_signed = FALSE;
126 if ((sigpos = strstr(textdata, sig_indicator)) == NULL) {
131 if (!(sigpos == textdata) && !(sigpos[-1] == '\n')) {
138 data->is_signed = TRUE;
143 static gint pgpinline_check_signature(MimeInfo *mimeinfo)
145 PrivacyDataPGP *data = NULL;
146 gchar *textdata = NULL, *tmp = NULL;
147 gpgme_data_t plain = NULL, cipher = NULL;
150 g_return_val_if_fail(mimeinfo != NULL, 0);
152 if (procmime_mimeinfo_parent(mimeinfo) == NULL)
153 return 0; /* not parent */
154 if (mimeinfo->type != MIMETYPE_TEXT)
157 g_return_val_if_fail(mimeinfo->privacy != NULL, 0);
158 data = (PrivacyDataPGP *) mimeinfo->privacy;
160 textdata = get_part_as_string(mimeinfo);
167 /* gtk2: convert back from utf8 */
168 tmp = conv_codeset_strdup(textdata, CS_UTF_8,
169 procmime_mimeinfo_get_parameter(mimeinfo, "charset"));
171 textdata = g_strdup(tmp);
175 gpgme_set_textmode(ctx, 1);
176 gpgme_set_armor(ctx, 1);
178 gpgme_data_new_from_mem(&plain, textdata, strlen(textdata), 1);
179 gpgme_data_new(&cipher);
181 data->sigstatus = sgpgme_verify_signature(ctx, plain, NULL, cipher);
183 gpgme_data_release(plain);
184 gpgme_data_release(cipher);
191 static SignatureStatus pgpinline_get_sig_status(MimeInfo *mimeinfo)
193 PrivacyDataPGP *data = (PrivacyDataPGP *) mimeinfo->privacy;
195 g_return_val_if_fail(data != NULL, SIGNATURE_INVALID);
197 if (data->sigstatus == NULL &&
198 prefs_gpg_get_config()->auto_check_signatures)
199 pgpinline_check_signature(mimeinfo);
201 return sgpgme_sigstat_gpgme_to_privacy(data->ctx, data->sigstatus);
204 static gchar *pgpinline_get_sig_info_short(MimeInfo *mimeinfo)
206 PrivacyDataPGP *data = (PrivacyDataPGP *) mimeinfo->privacy;
208 g_return_val_if_fail(data != NULL, g_strdup("Error"));
210 if (data->sigstatus == NULL &&
211 prefs_gpg_get_config()->auto_check_signatures)
212 pgpinline_check_signature(mimeinfo);
214 return sgpgme_sigstat_info_short(data->ctx, data->sigstatus);
217 static gchar *pgpinline_get_sig_info_full(MimeInfo *mimeinfo)
219 PrivacyDataPGP *data = (PrivacyDataPGP *) mimeinfo->privacy;
221 g_return_val_if_fail(data != NULL, g_strdup("Error"));
223 return sgpgme_sigstat_info_full(data->ctx, data->sigstatus);
228 static gboolean pgpinline_is_encrypted(MimeInfo *mimeinfo)
230 const gchar *enc_indicator = "-----BEGIN PGP MESSAGE-----";
233 g_return_val_if_fail(mimeinfo != NULL, FALSE);
235 if (procmime_mimeinfo_parent(mimeinfo) == NULL)
236 return FALSE; /* not parent */
238 if (mimeinfo->type != MIMETYPE_TEXT)
241 textdata = get_part_as_string(mimeinfo);
245 if (!strstr(textdata, enc_indicator)) {
254 static MimeInfo *pgpinline_decrypt(MimeInfo *mimeinfo)
256 MimeInfo *decinfo, *parseinfo;
257 gpgme_data_t cipher, plain;
260 gchar *textdata = NULL;
262 const gchar *src_codeset = NULL;
263 gpgme_verify_result_t sigstat = 0;
264 PrivacyDataPGP *data = NULL;
269 if (gpgme_new(&ctx) != GPG_ERR_NO_ERROR)
272 gpgme_set_textmode(ctx, 1);
273 gpgme_set_armor(ctx, 1);
275 g_return_val_if_fail(mimeinfo != NULL, NULL);
276 g_return_val_if_fail(pgpinline_is_encrypted(mimeinfo), NULL);
278 if (procmime_mimeinfo_parent(mimeinfo) == NULL ||
279 mimeinfo->type != MIMETYPE_TEXT) {
284 textdata = get_part_as_string(mimeinfo);
290 debug_print("decrypting '%s'\n", textdata);
291 gpgme_data_new_from_mem(&cipher, textdata, strlen(textdata), 1);
293 plain = sgpgme_decrypt_verify(cipher, &sigstat, ctx);
294 if (sigstat && !sigstat->signatures)
297 gpgme_data_release(cipher);
304 fname = g_strdup_printf("%s%cplaintext.%08x",
305 get_mime_tmp_dir(), G_DIR_SEPARATOR, ++id);
307 if ((dstfp = fopen(fname, "wb")) == NULL) {
308 FILE_OP_ERROR(fname, "fopen");
310 gpgme_data_release(plain);
315 src_codeset = procmime_mimeinfo_get_parameter(mimeinfo, "charset");
316 if (src_codeset == NULL)
317 src_codeset = CS_ISO_8859_1;
319 fprintf(dstfp, "MIME-Version: 1.0\r\n"
320 "Content-Type: text/plain; charset=%s\r\n"
321 "Content-Transfer-Encoding: 8bit\r\n"
325 chars = gpgme_data_release_and_get_mem(plain, &len);
327 fwrite(chars, len, 1, dstfp);
331 gpgme_data_release(plain);
333 parseinfo = procmime_scan_file(fname);
336 if (parseinfo == NULL) {
340 decinfo = g_node_first_child(parseinfo->node) != NULL ?
341 g_node_first_child(parseinfo->node)->data : NULL;
343 if (decinfo == NULL) {
348 g_node_unlink(decinfo->node);
349 procmime_mimeinfo_free_all(parseinfo);
353 if (sigstat != GPGME_SIG_STAT_NONE) {
354 if (decinfo->privacy != NULL) {
355 data = (PrivacyDataPGP *) decinfo->privacy;
357 data = pgpinline_new_privacydata();
358 decinfo->privacy = (PrivacyData *) data;
360 data->done_sigtest = TRUE;
361 data->is_signed = TRUE;
362 data->sigstatus = sigstat;
364 gpgme_release(data->ctx);
372 static gboolean pgpinline_sign(MimeInfo *mimeinfo, PrefsAccount *account)
374 MimeInfo *msgcontent;
375 gchar *textstr, *tmp;
379 gpgme_data_t gpgtext, gpgsig;
381 struct passphrase_cb_info_s info;
383 memset (&info, 0, sizeof info);
385 /* get content node from message */
386 msgcontent = (MimeInfo *) mimeinfo->node->children->data;
387 if (msgcontent->type == MIMETYPE_MULTIPART)
388 msgcontent = (MimeInfo *) msgcontent->node->children->data;
390 /* get rid of quoted-printable or anything */
391 procmime_decode_content(msgcontent);
394 procmime_write_mimeinfo(msgcontent, fp);
397 /* read temporary file into memory */
398 textstr = file_read_stream_to_str(fp);
400 /* gtk2: convert back from utf8 */
401 tmp = conv_codeset_strdup(textstr, CS_UTF_8,
402 procmime_mimeinfo_get_parameter(msgcontent, "charset"));
404 textstr = g_strdup(tmp);
409 gpgme_data_new_from_mem(&gpgtext, textstr, strlen(textstr), 0);
410 gpgme_data_new(&gpgsig);
412 gpgme_set_textmode(ctx, 1);
413 gpgme_set_armor(ctx, 1);
415 if (!sgpgme_setup_signers(ctx, account)) {
420 if (!getenv("GPG_AGENT_INFO")) {
422 gpgme_set_passphrase_cb (ctx, gpgmegtk_passphrase_cb, &info);
425 if (gpgme_op_sign(ctx, gpgtext, gpgsig, GPGME_SIG_MODE_CLEAR)
426 != GPG_ERR_NO_ERROR) {
432 sigcontent = gpgme_data_release_and_get_mem(gpgsig, &len);
433 tmp = g_malloc(len+1);
434 g_memmove(tmp, sigcontent, len+1);
436 gpgme_data_release(gpgtext);
440 if (msgcontent->content == MIMECONTENT_FILE &&
441 msgcontent->data.filename != NULL) {
442 unlink(msgcontent->data.filename);
443 g_free(msgcontent->data.filename);
445 msgcontent->data.mem = g_strdup(tmp);
446 msgcontent->content = MIMECONTENT_MEM;
449 /* avoid all sorts of clear-signing problems with non ascii
452 procmime_encode_content(msgcontent, ENC_BASE64);
457 static gchar *pgpinline_get_encrypt_data(GSList *recp_names)
459 return sgpgme_get_encrypt_data(recp_names);
462 static gboolean pgpinline_encrypt(MimeInfo *mimeinfo, const gchar *encrypt_data)
464 MimeInfo *msgcontent;
468 gchar *textstr, *tmp;
469 gpgme_data_t gpgtext, gpgenc;
471 gpgme_key_t *kset = NULL;
472 gchar **fprs = g_strsplit(encrypt_data, " ", -1);
474 while (fprs[i] && strlen(fprs[i])) {
478 kset = g_malloc(sizeof(gpgme_key_t)*(i+1));
479 memset(kset, 0, sizeof(gpgme_key_t)*(i+1));
482 while (fprs[i] && strlen(fprs[i])) {
485 err = gpgme_get_key(ctx, fprs[i], &key, 0);
487 debug_print("can't add key '%s'[%d] (%s)\n", fprs[i],i, gpgme_strerror(err));
490 debug_print("found %s at %d\n", fprs[i], i);
496 debug_print("Encrypting message content\n");
498 /* get content node from message */
499 msgcontent = (MimeInfo *) mimeinfo->node->children->data;
500 if (msgcontent->type == MIMETYPE_MULTIPART)
501 msgcontent = (MimeInfo *) msgcontent->node->children->data;
503 /* get rid of quoted-printable or anything */
504 procmime_decode_content(msgcontent);
507 procmime_write_mimeinfo(msgcontent, fp);
510 /* read temporary file into memory */
511 textstr = file_read_stream_to_str(fp);
513 /* gtk2: convert back from utf8 */
514 tmp = conv_codeset_strdup(textstr, CS_UTF_8,
515 procmime_mimeinfo_get_parameter(msgcontent, "charset"));
517 textstr = g_strdup(tmp);
522 gpgme_data_new_from_mem(&gpgtext, textstr, strlen(textstr), 0);
523 gpgme_data_new(&gpgenc);
525 gpgme_set_armor(ctx, 1);
527 gpgme_op_encrypt(ctx, kset, GPGME_ENCRYPT_ALWAYS_TRUST, gpgtext, gpgenc);
530 enccontent = gpgme_data_release_and_get_mem(gpgenc, &len);
532 tmp = g_malloc(len+1);
533 g_memmove(tmp, enccontent, len+1);
537 gpgme_data_release(gpgtext);
540 if (msgcontent->content == MIMECONTENT_FILE &&
541 msgcontent->data.filename != NULL) {
542 unlink(msgcontent->data.filename);
543 g_free(msgcontent->data.filename);
545 msgcontent->data.mem = g_strdup(tmp);
546 msgcontent->content = MIMECONTENT_MEM;
552 static PrivacySystem pgpinline_system = {
553 "pgpinline", /* id */
554 "PGP Inline", /* name */
556 pgpinline_free_privacydata, /* free_privacydata */
558 pgpinline_is_signed, /* is_signed(MimeInfo *) */
559 pgpinline_check_signature, /* check_signature(MimeInfo *) */
560 pgpinline_get_sig_status, /* get_sig_status(MimeInfo *) */
561 pgpinline_get_sig_info_short, /* get_sig_info_short(MimeInfo *) */
562 pgpinline_get_sig_info_full, /* get_sig_info_full(MimeInfo *) */
564 pgpinline_is_encrypted, /* is_encrypted(MimeInfo *) */
565 pgpinline_decrypt, /* decrypt(MimeInfo *) */
571 pgpinline_get_encrypt_data,
575 void pgpinline_init()
577 privacy_register_system(&pgpinline_system);
580 void pgpinline_done()
582 privacy_unregister_system(&pgpinline_system);
585 #endif /* USE_GPGME */