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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 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);
119 if ((sigpos = strstr(textdata, sig_indicator)) == NULL) {
124 if (!(sigpos == textdata) && !(sigpos[-1] == '\n')) {
132 data = pgpinline_new_privacydata();
133 mimeinfo->privacy = (PrivacyData *) data;
135 data->done_sigtest = TRUE;
136 data->is_signed = TRUE;
141 static gint pgpinline_check_signature(MimeInfo *mimeinfo)
143 PrivacyDataPGP *data = NULL;
144 gchar *textdata = NULL, *tmp = NULL;
145 gpgme_data_t plain = NULL, cipher = NULL;
148 g_return_val_if_fail(mimeinfo != NULL, 0);
150 if (procmime_mimeinfo_parent(mimeinfo) == NULL)
151 return 0; /* not parent */
152 if (mimeinfo->type != MIMETYPE_TEXT)
155 g_return_val_if_fail(mimeinfo->privacy != NULL, 0);
156 data = (PrivacyDataPGP *) mimeinfo->privacy;
158 textdata = get_part_as_string(mimeinfo);
165 /* gtk2: convert back from utf8 */
166 tmp = conv_codeset_strdup(textdata, CS_UTF_8,
167 procmime_mimeinfo_get_parameter(mimeinfo, "charset"));
169 textdata = g_strdup(tmp);
173 gpgme_set_textmode(ctx, 1);
174 gpgme_set_armor(ctx, 1);
176 gpgme_data_new_from_mem(&plain, textdata, strlen(textdata), 1);
177 gpgme_data_new(&cipher);
179 data->sigstatus = sgpgme_verify_signature(ctx, plain, NULL, cipher);
181 gpgme_data_release(plain);
182 gpgme_data_release(cipher);
189 static SignatureStatus pgpinline_get_sig_status(MimeInfo *mimeinfo)
191 PrivacyDataPGP *data = (PrivacyDataPGP *) mimeinfo->privacy;
193 g_return_val_if_fail(data != NULL, SIGNATURE_INVALID);
195 if (data->sigstatus == NULL &&
196 prefs_gpg_get_config()->auto_check_signatures)
197 pgpinline_check_signature(mimeinfo);
199 return sgpgme_sigstat_gpgme_to_privacy(data->ctx, data->sigstatus);
202 static gchar *pgpinline_get_sig_info_short(MimeInfo *mimeinfo)
204 PrivacyDataPGP *data = (PrivacyDataPGP *) mimeinfo->privacy;
206 g_return_val_if_fail(data != NULL, g_strdup("Error"));
208 if (data->sigstatus == NULL &&
209 prefs_gpg_get_config()->auto_check_signatures)
210 pgpinline_check_signature(mimeinfo);
212 return sgpgme_sigstat_info_short(data->ctx, data->sigstatus);
215 static gchar *pgpinline_get_sig_info_full(MimeInfo *mimeinfo)
217 PrivacyDataPGP *data = (PrivacyDataPGP *) mimeinfo->privacy;
219 g_return_val_if_fail(data != NULL, g_strdup("Error"));
221 return sgpgme_sigstat_info_full(data->ctx, data->sigstatus);
226 static gboolean pgpinline_is_encrypted(MimeInfo *mimeinfo)
228 const gchar *enc_indicator = "-----BEGIN PGP MESSAGE-----";
231 g_return_val_if_fail(mimeinfo != NULL, FALSE);
233 if (procmime_mimeinfo_parent(mimeinfo) == NULL)
234 return FALSE; /* not parent */
236 if (mimeinfo->type != MIMETYPE_TEXT)
239 textdata = get_part_as_string(mimeinfo);
243 if (!strstr(textdata, enc_indicator)) {
252 static MimeInfo *pgpinline_decrypt(MimeInfo *mimeinfo)
254 MimeInfo *decinfo, *parseinfo;
255 gpgme_data_t cipher, plain;
258 gchar *textdata = NULL;
260 const gchar *src_codeset = NULL;
261 gpgme_verify_result_t sigstat = 0;
262 PrivacyDataPGP *data = NULL;
267 if (gpgme_new(&ctx) != GPG_ERR_NO_ERROR)
270 gpgme_set_textmode(ctx, 1);
271 gpgme_set_armor(ctx, 1);
273 g_return_val_if_fail(mimeinfo != NULL, NULL);
274 g_return_val_if_fail(pgpinline_is_encrypted(mimeinfo), NULL);
276 if (procmime_mimeinfo_parent(mimeinfo) == NULL ||
277 mimeinfo->type != MIMETYPE_TEXT) {
282 textdata = get_part_as_string(mimeinfo);
288 debug_print("decrypting '%s'\n", textdata);
289 gpgme_data_new_from_mem(&cipher, textdata, strlen(textdata), 1);
291 plain = sgpgme_decrypt_verify(cipher, &sigstat, ctx);
292 if (sigstat && !sigstat->signatures)
295 gpgme_data_release(cipher);
302 fname = g_strdup_printf("%s%cplaintext.%08x",
303 get_mime_tmp_dir(), G_DIR_SEPARATOR, ++id);
305 if ((dstfp = g_fopen(fname, "wb")) == NULL) {
306 FILE_OP_ERROR(fname, "fopen");
308 gpgme_data_release(plain);
313 src_codeset = procmime_mimeinfo_get_parameter(mimeinfo, "charset");
314 if (src_codeset == NULL)
315 src_codeset = CS_ISO_8859_1;
317 fprintf(dstfp, "MIME-Version: 1.0\r\n"
318 "Content-Type: text/plain; charset=%s\r\n"
319 "Content-Transfer-Encoding: 8bit\r\n"
323 chars = gpgme_data_release_and_get_mem(plain, &len);
325 fwrite(chars, len, 1, dstfp);
329 gpgme_data_release(plain);
331 parseinfo = procmime_scan_file(fname);
334 if (parseinfo == NULL) {
338 decinfo = g_node_first_child(parseinfo->node) != NULL ?
339 g_node_first_child(parseinfo->node)->data : NULL;
341 if (decinfo == NULL) {
346 g_node_unlink(decinfo->node);
347 procmime_mimeinfo_free_all(parseinfo);
351 if (sigstat != GPGME_SIG_STAT_NONE) {
352 if (decinfo->privacy != NULL) {
353 data = (PrivacyDataPGP *) decinfo->privacy;
355 data = pgpinline_new_privacydata();
356 decinfo->privacy = (PrivacyData *) data;
358 data->done_sigtest = TRUE;
359 data->is_signed = TRUE;
360 data->sigstatus = sigstat;
362 gpgme_release(data->ctx);
370 static gboolean pgpinline_sign(MimeInfo *mimeinfo, PrefsAccount *account)
372 MimeInfo *msgcontent;
373 gchar *textstr, *tmp;
377 gpgme_data_t gpgtext, gpgsig;
379 struct passphrase_cb_info_s info;
381 memset (&info, 0, sizeof info);
383 /* get content node from message */
384 msgcontent = (MimeInfo *) mimeinfo->node->children->data;
385 if (msgcontent->type == MIMETYPE_MULTIPART)
386 msgcontent = (MimeInfo *) msgcontent->node->children->data;
388 /* get rid of quoted-printable or anything */
389 procmime_decode_content(msgcontent);
392 procmime_write_mimeinfo(msgcontent, fp);
395 /* read temporary file into memory */
396 textstr = file_read_stream_to_str(fp);
398 /* gtk2: convert back from utf8 */
399 tmp = conv_codeset_strdup(textstr, CS_UTF_8,
400 procmime_mimeinfo_get_parameter(msgcontent, "charset"));
402 textstr = g_strdup(tmp);
407 gpgme_data_new_from_mem(&gpgtext, textstr, strlen(textstr), 0);
408 gpgme_data_new(&gpgsig);
410 gpgme_set_textmode(ctx, 1);
411 gpgme_set_armor(ctx, 1);
413 if (!sgpgme_setup_signers(ctx, account)) {
418 if (!getenv("GPG_AGENT_INFO")) {
420 gpgme_set_passphrase_cb (ctx, gpgmegtk_passphrase_cb, &info);
423 if (gpgme_op_sign(ctx, gpgtext, gpgsig, GPGME_SIG_MODE_CLEAR)
424 != GPG_ERR_NO_ERROR) {
430 sigcontent = gpgme_data_release_and_get_mem(gpgsig, &len);
431 tmp = g_malloc(len+1);
432 g_memmove(tmp, sigcontent, len+1);
434 gpgme_data_release(gpgtext);
438 if (msgcontent->content == MIMECONTENT_FILE &&
439 msgcontent->data.filename != NULL) {
440 g_unlink(msgcontent->data.filename);
441 g_free(msgcontent->data.filename);
443 msgcontent->data.mem = g_strdup(tmp);
444 msgcontent->content = MIMECONTENT_MEM;
447 /* avoid all sorts of clear-signing problems with non ascii
450 procmime_encode_content(msgcontent, ENC_BASE64);
455 static gchar *pgpinline_get_encrypt_data(GSList *recp_names)
457 return sgpgme_get_encrypt_data(recp_names);
460 static gboolean pgpinline_encrypt(MimeInfo *mimeinfo, const gchar *encrypt_data)
462 MimeInfo *msgcontent;
466 gchar *textstr, *tmp;
467 gpgme_data_t gpgtext, gpgenc;
469 gpgme_key_t *kset = NULL;
470 gchar **fprs = g_strsplit(encrypt_data, " ", -1);
472 while (fprs[i] && strlen(fprs[i])) {
476 kset = g_malloc(sizeof(gpgme_key_t)*(i+1));
477 memset(kset, 0, sizeof(gpgme_key_t)*(i+1));
480 while (fprs[i] && strlen(fprs[i])) {
483 err = gpgme_get_key(ctx, fprs[i], &key, 0);
485 debug_print("can't add key '%s'[%d] (%s)\n", fprs[i],i, gpgme_strerror(err));
488 debug_print("found %s at %d\n", fprs[i], i);
494 debug_print("Encrypting message content\n");
496 /* get content node from message */
497 msgcontent = (MimeInfo *) mimeinfo->node->children->data;
498 if (msgcontent->type == MIMETYPE_MULTIPART)
499 msgcontent = (MimeInfo *) msgcontent->node->children->data;
501 /* get rid of quoted-printable or anything */
502 procmime_decode_content(msgcontent);
505 procmime_write_mimeinfo(msgcontent, fp);
508 /* read temporary file into memory */
509 textstr = file_read_stream_to_str(fp);
511 /* gtk2: convert back from utf8 */
512 tmp = conv_codeset_strdup(textstr, CS_UTF_8,
513 procmime_mimeinfo_get_parameter(msgcontent, "charset"));
515 textstr = g_strdup(tmp);
520 gpgme_data_new_from_mem(&gpgtext, textstr, strlen(textstr), 0);
521 gpgme_data_new(&gpgenc);
523 gpgme_set_armor(ctx, 1);
525 gpgme_op_encrypt(ctx, kset, GPGME_ENCRYPT_ALWAYS_TRUST, gpgtext, gpgenc);
528 enccontent = gpgme_data_release_and_get_mem(gpgenc, &len);
530 tmp = g_malloc(len+1);
531 g_memmove(tmp, enccontent, len+1);
535 gpgme_data_release(gpgtext);
538 if (msgcontent->content == MIMECONTENT_FILE &&
539 msgcontent->data.filename != NULL) {
540 g_unlink(msgcontent->data.filename);
541 g_free(msgcontent->data.filename);
543 msgcontent->data.mem = g_strdup(tmp);
544 msgcontent->content = MIMECONTENT_MEM;
550 static PrivacySystem pgpinline_system = {
551 "pgpinline", /* id */
552 "PGP Inline", /* name */
554 pgpinline_free_privacydata, /* free_privacydata */
556 pgpinline_is_signed, /* is_signed(MimeInfo *) */
557 pgpinline_check_signature, /* check_signature(MimeInfo *) */
558 pgpinline_get_sig_status, /* get_sig_status(MimeInfo *) */
559 pgpinline_get_sig_info_short, /* get_sig_info_short(MimeInfo *) */
560 pgpinline_get_sig_info_full, /* get_sig_info_full(MimeInfo *) */
562 pgpinline_is_encrypted, /* is_encrypted(MimeInfo *) */
563 pgpinline_decrypt, /* decrypt(MimeInfo *) */
569 pgpinline_get_encrypt_data,
573 void pgpinline_init()
575 privacy_register_system(&pgpinline_system);
578 void pgpinline_done()
580 privacy_unregister_system(&pgpinline_system);
583 #endif /* USE_GPGME */