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 tmp = conv_codeset_strdup(textdata, CS_UTF_8,
170 conv_get_locale_charset_str_no_utf8());
173 g_warning("Can't convert charset to anything sane\n");
174 tmp = conv_codeset_strdup(textdata, CS_UTF_8, CS_US_ASCII);
181 textdata = g_strdup(tmp);
185 gpgme_set_textmode(ctx, 1);
186 gpgme_set_armor(ctx, 1);
188 gpgme_data_new_from_mem(&plain, textdata, strlen(textdata), 1);
189 gpgme_data_new(&cipher);
191 data->sigstatus = sgpgme_verify_signature(ctx, plain, NULL, cipher);
193 gpgme_data_release(plain);
194 gpgme_data_release(cipher);
201 static SignatureStatus pgpinline_get_sig_status(MimeInfo *mimeinfo)
203 PrivacyDataPGP *data = (PrivacyDataPGP *) mimeinfo->privacy;
205 g_return_val_if_fail(data != NULL, SIGNATURE_INVALID);
207 if (data->sigstatus == NULL &&
208 prefs_gpg_get_config()->auto_check_signatures)
209 pgpinline_check_signature(mimeinfo);
211 return sgpgme_sigstat_gpgme_to_privacy(data->ctx, data->sigstatus);
214 static gchar *pgpinline_get_sig_info_short(MimeInfo *mimeinfo)
216 PrivacyDataPGP *data = (PrivacyDataPGP *) mimeinfo->privacy;
218 g_return_val_if_fail(data != NULL, g_strdup("Error"));
220 if (data->sigstatus == NULL &&
221 prefs_gpg_get_config()->auto_check_signatures)
222 pgpinline_check_signature(mimeinfo);
224 return sgpgme_sigstat_info_short(data->ctx, data->sigstatus);
227 static gchar *pgpinline_get_sig_info_full(MimeInfo *mimeinfo)
229 PrivacyDataPGP *data = (PrivacyDataPGP *) mimeinfo->privacy;
231 g_return_val_if_fail(data != NULL, g_strdup("Error"));
233 return sgpgme_sigstat_info_full(data->ctx, data->sigstatus);
238 static gboolean pgpinline_is_encrypted(MimeInfo *mimeinfo)
240 const gchar *enc_indicator = "-----BEGIN PGP MESSAGE-----";
243 g_return_val_if_fail(mimeinfo != NULL, FALSE);
245 if (procmime_mimeinfo_parent(mimeinfo) == NULL)
246 return FALSE; /* not parent */
248 if (mimeinfo->type != MIMETYPE_TEXT)
251 textdata = get_part_as_string(mimeinfo);
255 if (!strstr(textdata, enc_indicator)) {
264 static MimeInfo *pgpinline_decrypt(MimeInfo *mimeinfo)
266 MimeInfo *decinfo, *parseinfo;
267 gpgme_data_t cipher, plain;
270 gchar *textdata = NULL;
272 const gchar *src_codeset = NULL;
273 gpgme_verify_result_t sigstat = 0;
274 PrivacyDataPGP *data = NULL;
279 if (gpgme_new(&ctx) != GPG_ERR_NO_ERROR)
282 gpgme_set_textmode(ctx, 1);
283 gpgme_set_armor(ctx, 1);
285 g_return_val_if_fail(mimeinfo != NULL, NULL);
286 g_return_val_if_fail(pgpinline_is_encrypted(mimeinfo), NULL);
288 if (procmime_mimeinfo_parent(mimeinfo) == NULL ||
289 mimeinfo->type != MIMETYPE_TEXT) {
294 textdata = get_part_as_string(mimeinfo);
300 debug_print("decrypting '%s'\n", textdata);
301 gpgme_data_new_from_mem(&cipher, textdata, strlen(textdata), 1);
303 plain = sgpgme_decrypt_verify(cipher, &sigstat, ctx);
304 if (sigstat && !sigstat->signatures)
307 gpgme_data_release(cipher);
314 fname = g_strdup_printf("%s%cplaintext.%08x",
315 get_mime_tmp_dir(), G_DIR_SEPARATOR, ++id);
317 if ((dstfp = g_fopen(fname, "wb")) == NULL) {
318 FILE_OP_ERROR(fname, "fopen");
320 gpgme_data_release(plain);
325 src_codeset = procmime_mimeinfo_get_parameter(mimeinfo, "charset");
326 if (src_codeset == NULL)
327 src_codeset = CS_ISO_8859_1;
329 fprintf(dstfp, "MIME-Version: 1.0\r\n"
330 "Content-Type: text/plain; charset=%s\r\n"
331 "Content-Transfer-Encoding: 8bit\r\n"
335 chars = gpgme_data_release_and_get_mem(plain, &len);
337 fwrite(chars, len, 1, dstfp);
341 gpgme_data_release(plain);
343 parseinfo = procmime_scan_file(fname);
346 if (parseinfo == NULL) {
350 decinfo = g_node_first_child(parseinfo->node) != NULL ?
351 g_node_first_child(parseinfo->node)->data : NULL;
353 if (decinfo == NULL) {
358 g_node_unlink(decinfo->node);
359 procmime_mimeinfo_free_all(parseinfo);
363 if (sigstat != GPGME_SIG_STAT_NONE) {
364 if (decinfo->privacy != NULL) {
365 data = (PrivacyDataPGP *) decinfo->privacy;
367 data = pgpinline_new_privacydata();
368 decinfo->privacy = (PrivacyData *) data;
370 data->done_sigtest = TRUE;
371 data->is_signed = TRUE;
372 data->sigstatus = sigstat;
374 gpgme_release(data->ctx);
382 static gboolean pgpinline_sign(MimeInfo *mimeinfo, PrefsAccount *account)
384 MimeInfo *msgcontent;
385 gchar *textstr, *tmp;
389 gpgme_data_t gpgtext, gpgsig;
391 struct passphrase_cb_info_s info;
393 memset (&info, 0, sizeof info);
395 /* get content node from message */
396 msgcontent = (MimeInfo *) mimeinfo->node->children->data;
397 if (msgcontent->type == MIMETYPE_MULTIPART)
398 msgcontent = (MimeInfo *) msgcontent->node->children->data;
400 /* get rid of quoted-printable or anything */
401 procmime_decode_content(msgcontent);
405 perror("my_tmpfile");
408 procmime_write_mimeinfo(msgcontent, fp);
411 /* read temporary file into memory */
412 textstr = file_read_stream_to_str(fp);
414 /* gtk2: convert back from utf8 */
415 tmp = conv_codeset_strdup(textstr, CS_UTF_8,
416 procmime_mimeinfo_get_parameter(msgcontent, "charset"));
418 textstr = g_strdup(tmp);
423 gpgme_data_new_from_mem(&gpgtext, textstr, strlen(textstr), 0);
424 gpgme_data_new(&gpgsig);
426 gpgme_set_textmode(ctx, 1);
427 gpgme_set_armor(ctx, 1);
429 if (!sgpgme_setup_signers(ctx, account)) {
434 if (!getenv("GPG_AGENT_INFO")) {
436 gpgme_set_passphrase_cb (ctx, gpgmegtk_passphrase_cb, &info);
439 if (gpgme_op_sign(ctx, gpgtext, gpgsig, GPGME_SIG_MODE_CLEAR)
440 != GPG_ERR_NO_ERROR) {
446 sigcontent = gpgme_data_release_and_get_mem(gpgsig, &len);
447 tmp = g_malloc(len+1);
448 g_memmove(tmp, sigcontent, len+1);
450 gpgme_data_release(gpgtext);
454 if (msgcontent->content == MIMECONTENT_FILE &&
455 msgcontent->data.filename != NULL) {
456 g_unlink(msgcontent->data.filename);
457 g_free(msgcontent->data.filename);
459 msgcontent->data.mem = g_strdup(tmp);
460 msgcontent->content = MIMECONTENT_MEM;
463 /* avoid all sorts of clear-signing problems with non ascii
466 procmime_encode_content(msgcontent, ENC_BASE64);
471 static gchar *pgpinline_get_encrypt_data(GSList *recp_names)
473 return sgpgme_get_encrypt_data(recp_names);
476 static gboolean pgpinline_encrypt(MimeInfo *mimeinfo, const gchar *encrypt_data)
478 MimeInfo *msgcontent;
482 gchar *textstr, *tmp;
483 gpgme_data_t gpgtext, gpgenc;
485 gpgme_key_t *kset = NULL;
486 gchar **fprs = g_strsplit(encrypt_data, " ", -1);
488 while (fprs[i] && strlen(fprs[i])) {
492 kset = g_malloc(sizeof(gpgme_key_t)*(i+1));
493 memset(kset, 0, sizeof(gpgme_key_t)*(i+1));
496 while (fprs[i] && strlen(fprs[i])) {
499 err = gpgme_get_key(ctx, fprs[i], &key, 0);
501 debug_print("can't add key '%s'[%d] (%s)\n", fprs[i],i, gpgme_strerror(err));
504 debug_print("found %s at %d\n", fprs[i], i);
510 debug_print("Encrypting message content\n");
512 /* get content node from message */
513 msgcontent = (MimeInfo *) mimeinfo->node->children->data;
514 if (msgcontent->type == MIMETYPE_MULTIPART)
515 msgcontent = (MimeInfo *) msgcontent->node->children->data;
517 /* get rid of quoted-printable or anything */
518 procmime_decode_content(msgcontent);
522 perror("my_tmpfile");
525 procmime_write_mimeinfo(msgcontent, fp);
528 /* read temporary file into memory */
529 textstr = file_read_stream_to_str(fp);
531 /* gtk2: convert back from utf8 */
532 tmp = conv_codeset_strdup(textstr, CS_UTF_8,
533 procmime_mimeinfo_get_parameter(msgcontent, "charset"));
535 textstr = g_strdup(tmp);
540 gpgme_data_new_from_mem(&gpgtext, textstr, strlen(textstr), 0);
541 gpgme_data_new(&gpgenc);
543 gpgme_set_armor(ctx, 1);
545 gpgme_op_encrypt(ctx, kset, GPGME_ENCRYPT_ALWAYS_TRUST, gpgtext, gpgenc);
548 enccontent = gpgme_data_release_and_get_mem(gpgenc, &len);
550 tmp = g_malloc(len+1);
551 g_memmove(tmp, enccontent, len+1);
555 gpgme_data_release(gpgtext);
558 if (msgcontent->content == MIMECONTENT_FILE &&
559 msgcontent->data.filename != NULL) {
560 g_unlink(msgcontent->data.filename);
561 g_free(msgcontent->data.filename);
563 msgcontent->data.mem = g_strdup(tmp);
564 msgcontent->content = MIMECONTENT_MEM;
570 static PrivacySystem pgpinline_system = {
571 "pgpinline", /* id */
572 "PGP Inline", /* name */
574 pgpinline_free_privacydata, /* free_privacydata */
576 pgpinline_is_signed, /* is_signed(MimeInfo *) */
577 pgpinline_check_signature, /* check_signature(MimeInfo *) */
578 pgpinline_get_sig_status, /* get_sig_status(MimeInfo *) */
579 pgpinline_get_sig_info_short, /* get_sig_info_short(MimeInfo *) */
580 pgpinline_get_sig_info_full, /* get_sig_info_full(MimeInfo *) */
582 pgpinline_is_encrypted, /* is_encrypted(MimeInfo *) */
583 pgpinline_decrypt, /* decrypt(MimeInfo *) */
589 pgpinline_get_encrypt_data,
593 void pgpinline_init()
595 privacy_register_system(&pgpinline_system);
598 void pgpinline_done()
600 privacy_unregister_system(&pgpinline_system);
603 #endif /* USE_GPGME */