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.
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 *fp_read_noconv(FILE *fp)
90 array = g_byte_array_new();
92 while ((n_read = fread(buf, sizeof(gchar), sizeof(buf), fp)) > 0) {
93 if (n_read < sizeof(buf) && ferror(fp))
95 g_byte_array_append(array, buf, n_read);
99 FILE_OP_ERROR("file stream", "fread");
100 g_byte_array_free(array, TRUE);
105 g_byte_array_append(array, buf, 1);
106 result = (gchar *)array->data;
107 g_byte_array_free(array, FALSE);
112 static gchar *get_part_as_string(MimeInfo *mimeinfo)
114 gchar *textdata = NULL;
116 g_return_val_if_fail(mimeinfo != NULL, 0);
117 procmime_decode_content(mimeinfo);
118 if (mimeinfo->content == MIMECONTENT_MEM)
119 textdata = g_strdup(mimeinfo->data.mem);
121 /* equals file_read_to_str but without conversion */
122 FILE *fp = fopen(mimeinfo->data.filename, "r");
125 textdata = fp_read_noconv(fp);
129 if (!g_utf8_validate(textdata, -1, NULL)) {
131 codeconv_set_strict(TRUE);
132 if (procmime_mimeinfo_get_parameter(mimeinfo, "charset")) {
133 tmp = conv_codeset_strdup(textdata,
134 procmime_mimeinfo_get_parameter(mimeinfo, "charset"),
138 tmp = conv_codeset_strdup(textdata,
139 conv_get_locale_charset_str_no_utf8(),
142 codeconv_set_strict(FALSE);
144 tmp = conv_codeset_strdup(textdata,
145 conv_get_locale_charset_str_no_utf8(),
157 static gboolean pgpinline_is_signed(MimeInfo *mimeinfo)
159 PrivacyDataPGP *data = NULL;
160 const gchar *sig_indicator = "-----BEGIN PGP SIGNED MESSAGE-----";
161 gchar *textdata, *sigpos;
163 g_return_val_if_fail(mimeinfo != NULL, FALSE);
165 if (procmime_mimeinfo_parent(mimeinfo) == NULL)
166 return FALSE; /* not parent */
168 if (mimeinfo->type != MIMETYPE_TEXT &&
169 (mimeinfo->type != MIMETYPE_APPLICATION ||
170 g_ascii_strcasecmp(mimeinfo->subtype, "pgp")))
173 /* Seal the deal. This has to be text/plain through and through. */
174 if (mimeinfo->type == MIMETYPE_APPLICATION)
176 mimeinfo->type = MIMETYPE_TEXT;
177 g_free(mimeinfo->subtype);
178 mimeinfo->subtype = g_strdup("plain");
181 if (mimeinfo->privacy != NULL) {
182 data = (PrivacyDataPGP *) mimeinfo->privacy;
183 if (data->done_sigtest)
184 return data->is_signed;
187 textdata = get_part_as_string(mimeinfo);
191 if ((sigpos = strstr(textdata, sig_indicator)) == NULL) {
196 if (!(sigpos == textdata) && !(sigpos[-1] == '\n')) {
204 data = pgpinline_new_privacydata();
205 mimeinfo->privacy = (PrivacyData *) data;
207 data->done_sigtest = TRUE;
208 data->is_signed = TRUE;
213 static gint pgpinline_check_signature(MimeInfo *mimeinfo)
215 PrivacyDataPGP *data = NULL;
216 gchar *textdata = NULL, *tmp = NULL;
217 gpgme_data_t plain = NULL, cipher = NULL;
220 g_return_val_if_fail(mimeinfo != NULL, 0);
222 if (procmime_mimeinfo_parent(mimeinfo) == NULL)
223 return 0; /* not parent */
224 if (mimeinfo->type != MIMETYPE_TEXT)
227 g_return_val_if_fail(mimeinfo->privacy != NULL, 0);
228 data = (PrivacyDataPGP *) mimeinfo->privacy;
230 textdata = get_part_as_string(mimeinfo);
237 /* gtk2: convert back from utf8 */
238 tmp = conv_codeset_strdup(textdata, CS_UTF_8,
239 procmime_mimeinfo_get_parameter(mimeinfo, "charset"));
241 tmp = conv_codeset_strdup(textdata, CS_UTF_8,
242 conv_get_locale_charset_str_no_utf8());
245 g_warning("Can't convert charset to anything sane\n");
246 tmp = conv_codeset_strdup(textdata, CS_UTF_8, CS_US_ASCII);
253 textdata = g_strdup(tmp);
257 gpgme_set_textmode(ctx, 1);
258 gpgme_set_armor(ctx, 1);
260 gpgme_data_new_from_mem(&plain, textdata, strlen(textdata), 1);
261 gpgme_data_new(&cipher);
263 data->sigstatus = sgpgme_verify_signature(ctx, plain, NULL, cipher);
265 gpgme_data_release(plain);
266 gpgme_data_release(cipher);
273 static SignatureStatus pgpinline_get_sig_status(MimeInfo *mimeinfo)
275 PrivacyDataPGP *data = (PrivacyDataPGP *) mimeinfo->privacy;
277 g_return_val_if_fail(data != NULL, SIGNATURE_INVALID);
279 if (data->sigstatus == NULL &&
280 prefs_gpg_get_config()->auto_check_signatures)
281 pgpinline_check_signature(mimeinfo);
283 return sgpgme_sigstat_gpgme_to_privacy(data->ctx, data->sigstatus);
286 static gchar *pgpinline_get_sig_info_short(MimeInfo *mimeinfo)
288 PrivacyDataPGP *data = (PrivacyDataPGP *) mimeinfo->privacy;
290 g_return_val_if_fail(data != NULL, g_strdup("Error"));
292 if (data->sigstatus == NULL &&
293 prefs_gpg_get_config()->auto_check_signatures)
294 pgpinline_check_signature(mimeinfo);
296 return sgpgme_sigstat_info_short(data->ctx, data->sigstatus);
299 static gchar *pgpinline_get_sig_info_full(MimeInfo *mimeinfo)
301 PrivacyDataPGP *data = (PrivacyDataPGP *) mimeinfo->privacy;
303 g_return_val_if_fail(data != NULL, g_strdup("Error"));
305 return sgpgme_sigstat_info_full(data->ctx, data->sigstatus);
310 static gboolean pgpinline_is_encrypted(MimeInfo *mimeinfo)
312 const gchar *enc_indicator = "-----BEGIN PGP MESSAGE-----";
315 g_return_val_if_fail(mimeinfo != NULL, FALSE);
317 if (procmime_mimeinfo_parent(mimeinfo) == NULL)
318 return FALSE; /* not parent */
320 if (mimeinfo->type != MIMETYPE_TEXT &&
321 (mimeinfo->type != MIMETYPE_APPLICATION ||
322 g_ascii_strcasecmp(mimeinfo->subtype, "pgp")))
325 /* Seal the deal. This has to be text/plain through and through. */
326 if (mimeinfo->type == MIMETYPE_APPLICATION)
328 mimeinfo->type = MIMETYPE_TEXT;
329 g_free(mimeinfo->subtype);
330 mimeinfo->subtype = g_strdup("plain");
333 textdata = get_part_as_string(mimeinfo);
337 if (!strstr(textdata, enc_indicator)) {
346 static MimeInfo *pgpinline_decrypt(MimeInfo *mimeinfo)
348 MimeInfo *decinfo, *parseinfo;
349 gpgme_data_t cipher, plain;
352 gchar *textdata = NULL;
354 const gchar *src_codeset = NULL;
355 gpgme_verify_result_t sigstat = 0;
356 PrivacyDataPGP *data = NULL;
361 if (gpgme_new(&ctx) != GPG_ERR_NO_ERROR)
364 gpgme_set_textmode(ctx, 1);
365 gpgme_set_armor(ctx, 1);
367 g_return_val_if_fail(mimeinfo != NULL, NULL);
368 g_return_val_if_fail(pgpinline_is_encrypted(mimeinfo), NULL);
370 if (procmime_mimeinfo_parent(mimeinfo) == NULL ||
371 mimeinfo->type != MIMETYPE_TEXT) {
376 textdata = get_part_as_string(mimeinfo);
382 debug_print("decrypting '%s'\n", textdata);
383 gpgme_data_new_from_mem(&cipher, textdata, strlen(textdata), 1);
385 plain = sgpgme_decrypt_verify(cipher, &sigstat, ctx);
386 if (sigstat && !sigstat->signatures)
389 gpgme_data_release(cipher);
396 fname = g_strdup_printf("%s%cplaintext.%08x",
397 get_mime_tmp_dir(), G_DIR_SEPARATOR, ++id);
399 if ((dstfp = g_fopen(fname, "wb")) == NULL) {
400 FILE_OP_ERROR(fname, "fopen");
402 gpgme_data_release(plain);
407 src_codeset = procmime_mimeinfo_get_parameter(mimeinfo, "charset");
408 if (src_codeset == NULL)
409 src_codeset = CS_ISO_8859_1;
411 fprintf(dstfp, "MIME-Version: 1.0\r\n"
412 "Content-Type: text/plain; charset=%s\r\n"
413 "Content-Transfer-Encoding: 8bit\r\n"
417 chars = gpgme_data_release_and_get_mem(plain, &len);
419 fwrite(chars, len, 1, dstfp);
423 gpgme_data_release(plain);
425 parseinfo = procmime_scan_file(fname);
428 if (parseinfo == NULL) {
432 decinfo = g_node_first_child(parseinfo->node) != NULL ?
433 g_node_first_child(parseinfo->node)->data : NULL;
435 if (decinfo == NULL) {
440 g_node_unlink(decinfo->node);
441 procmime_mimeinfo_free_all(parseinfo);
445 if (sigstat != GPGME_SIG_STAT_NONE) {
446 if (decinfo->privacy != NULL) {
447 data = (PrivacyDataPGP *) decinfo->privacy;
449 data = pgpinline_new_privacydata();
450 decinfo->privacy = (PrivacyData *) data;
452 data->done_sigtest = TRUE;
453 data->is_signed = TRUE;
454 data->sigstatus = sigstat;
456 gpgme_release(data->ctx);
464 static gboolean pgpinline_sign(MimeInfo *mimeinfo, PrefsAccount *account)
466 MimeInfo *msgcontent;
467 gchar *textstr, *tmp;
471 gpgme_data_t gpgtext, gpgsig;
473 struct passphrase_cb_info_s info;
475 memset (&info, 0, sizeof info);
477 /* get content node from message */
478 msgcontent = (MimeInfo *) mimeinfo->node->children->data;
479 if (msgcontent->type == MIMETYPE_MULTIPART)
480 msgcontent = (MimeInfo *) msgcontent->node->children->data;
482 /* get rid of quoted-printable or anything */
483 procmime_decode_content(msgcontent);
487 perror("my_tmpfile");
490 procmime_write_mimeinfo(msgcontent, fp);
493 /* read temporary file into memory */
494 textstr = fp_read_noconv(fp);
498 gpgme_data_new_from_mem(&gpgtext, textstr, strlen(textstr), 0);
499 gpgme_data_new(&gpgsig);
501 gpgme_set_textmode(ctx, 1);
502 gpgme_set_armor(ctx, 1);
504 if (!sgpgme_setup_signers(ctx, account)) {
509 if (!getenv("GPG_AGENT_INFO")) {
511 gpgme_set_passphrase_cb (ctx, gpgmegtk_passphrase_cb, &info);
514 if (gpgme_op_sign(ctx, gpgtext, gpgsig, GPGME_SIG_MODE_CLEAR)
515 != GPG_ERR_NO_ERROR) {
520 sigcontent = gpgme_data_release_and_get_mem(gpgsig, &len);
524 if (sigcontent == NULL || len <= 0) {
525 g_warning("gpgme_data_release_and_get_mem failed");
526 gpgme_data_release(gpgtext);
532 tmp = g_malloc(len+1);
533 g_memmove(tmp, sigcontent, len+1);
535 gpgme_data_release(gpgtext);
539 if (msgcontent->content == MIMECONTENT_FILE &&
540 msgcontent->data.filename != NULL) {
541 g_unlink(msgcontent->data.filename);
542 g_free(msgcontent->data.filename);
544 msgcontent->data.mem = g_strdup(tmp);
545 msgcontent->content = MIMECONTENT_MEM;
548 /* avoid all sorts of clear-signing problems with non ascii
551 procmime_encode_content(msgcontent, ENC_BASE64);
556 static gchar *pgpinline_get_encrypt_data(GSList *recp_names)
558 return sgpgme_get_encrypt_data(recp_names, GPGME_PROTOCOL_OpenPGP);
561 static gboolean pgpinline_encrypt(MimeInfo *mimeinfo, const gchar *encrypt_data)
563 MimeInfo *msgcontent;
567 gchar *textstr, *tmp;
568 gpgme_data_t gpgtext, gpgenc;
570 gpgme_key_t *kset = NULL;
571 gchar **fprs = g_strsplit(encrypt_data, " ", -1);
573 while (fprs[i] && strlen(fprs[i])) {
577 kset = g_malloc(sizeof(gpgme_key_t)*(i+1));
578 memset(kset, 0, sizeof(gpgme_key_t)*(i+1));
581 while (fprs[i] && strlen(fprs[i])) {
584 err = gpgme_get_key(ctx, fprs[i], &key, 0);
586 debug_print("can't add key '%s'[%d] (%s)\n", fprs[i],i, gpgme_strerror(err));
589 debug_print("found %s at %d\n", fprs[i], i);
595 debug_print("Encrypting message content\n");
597 /* get content node from message */
598 msgcontent = (MimeInfo *) mimeinfo->node->children->data;
599 if (msgcontent->type == MIMETYPE_MULTIPART)
600 msgcontent = (MimeInfo *) msgcontent->node->children->data;
602 /* get rid of quoted-printable or anything */
603 procmime_decode_content(msgcontent);
607 perror("my_tmpfile");
610 procmime_write_mimeinfo(msgcontent, fp);
613 /* read temporary file into memory */
614 textstr = fp_read_noconv(fp);
619 gpgme_data_new_from_mem(&gpgtext, textstr, strlen(textstr), 0);
620 gpgme_data_new(&gpgenc);
622 gpgme_set_armor(ctx, 1);
624 gpgme_op_encrypt(ctx, kset, GPGME_ENCRYPT_ALWAYS_TRUST, gpgtext, gpgenc);
627 enccontent = gpgme_data_release_and_get_mem(gpgenc, &len);
629 if (enccontent == NULL || len <= 0) {
630 g_warning("gpgme_data_release_and_get_mem failed");
631 gpgme_data_release(gpgtext);
636 tmp = g_malloc(len+1);
637 g_memmove(tmp, enccontent, len+1);
641 gpgme_data_release(gpgtext);
644 if (msgcontent->content == MIMECONTENT_FILE &&
645 msgcontent->data.filename != NULL) {
646 g_unlink(msgcontent->data.filename);
647 g_free(msgcontent->data.filename);
649 msgcontent->data.mem = g_strdup(tmp);
650 msgcontent->content = MIMECONTENT_MEM;
656 static PrivacySystem pgpinline_system = {
657 "pgpinline", /* id */
658 "PGP Inline", /* name */
660 pgpinline_free_privacydata, /* free_privacydata */
662 pgpinline_is_signed, /* is_signed(MimeInfo *) */
663 pgpinline_check_signature, /* check_signature(MimeInfo *) */
664 pgpinline_get_sig_status, /* get_sig_status(MimeInfo *) */
665 pgpinline_get_sig_info_short, /* get_sig_info_short(MimeInfo *) */
666 pgpinline_get_sig_info_full, /* get_sig_info_full(MimeInfo *) */
668 pgpinline_is_encrypted, /* is_encrypted(MimeInfo *) */
669 pgpinline_decrypt, /* decrypt(MimeInfo *) */
675 pgpinline_get_encrypt_data,
679 void pgpinline_init()
681 privacy_register_system(&pgpinline_system);
684 void pgpinline_done()
686 privacy_unregister_system(&pgpinline_system);
689 #endif /* USE_GPGME */