2 * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
3 * Copyright (C) 2001 Werner Koch (dd9jn)
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
38 #include "procheader.h"
44 #include "prefs_common.h"
45 #include "passphrase.h"
46 #include "select-keys.h"
47 #include "sigstatus.h"
50 #define DIM(v) (sizeof(v)/sizeof((v)[0]))
52 static char *content_names[] = {
54 "Content-Disposition",
55 "Content-Transfer-Encoding",
59 static char *mime_version_name[] = {
64 static void sig_expiration_check (GString *str,
69 static void sig_expired (GString *str,
72 static void sig_key_expired (GString *str,
77 static void dump_mimeinfo (const char *text, MimeInfo *x)
79 debug_print ("MimeInfo[%s] %p level=%d\n",
80 text, x, x? x->level:0 );
84 debug_print (" enc=`%s' enc_type=%d mime_type=%d\n",
85 x->encoding, x->encoding_type, x->mime_type );
86 debug_print (" cont_type=`%s' cs=`%s' name=`%s' bnd=`%s'\n",
87 x->content_type, x->charset, x->name, x->boundary );
88 debug_print (" cont_disp=`%s' fname=`%s' fpos=%ld size=%u, lvl=%d\n",
89 x->content_disposition, x->filename, x->fpos, x->size,
91 dump_mimeinfo (".main", x->main );
92 dump_mimeinfo (".sub", x->sub );
93 dump_mimeinfo (".next", x->next );
94 debug_print ("MimeInfo[.parent] %p\n", x );
95 dump_mimeinfo (".children", x->children );
96 dump_mimeinfo (".plaintext", x->plaintext );
99 static void dump_part ( MimeInfo *mimeinfo, FILE *fp )
101 unsigned int size = mimeinfo->size;
104 if (fseek (fp, mimeinfo->fpos, SEEK_SET)) {
105 debug_print ("dump_part: fseek error\n");
109 debug_print ("--- begin dump_part ----\n");
110 while (size-- && (c = getc (fp)) != EOF)
113 debug_print ("dump_part: read error\n");
114 debug_print ("--- end dump_part ----\n");
119 rfc2015_disable_all (void)
121 /* FIXME: set a flag, so that we don't bother the user with failed
127 rfc2015_secure_remove (const char *fname)
131 /* fixme: overwrite the file first */
137 sig_status_to_string (GpgmeSigStat status)
142 case GPGME_SIG_STAT_NONE:
143 result = _("Oops: Signature not verified");
145 case GPGME_SIG_STAT_NOSIG:
146 result = _("No signature found");
148 case GPGME_SIG_STAT_GOOD:
149 result = _("Good signature");
151 case GPGME_SIG_STAT_GOOD_EXP:
152 result = _("Good signature but it has expired");
154 case GPGME_SIG_STAT_GOOD_EXPKEY:
155 result = _("Good signature but the key has expired");
157 case GPGME_SIG_STAT_BAD:
158 result = _("BAD signature");
160 case GPGME_SIG_STAT_NOKEY:
161 result = _("No public key to verify the signature");
163 case GPGME_SIG_STAT_ERROR:
164 result = _("Error verifying the signature");
166 case GPGME_SIG_STAT_DIFF:
167 result = _("Different results for signatures");
170 result = _("Error: Unknown status");
178 sig_status_with_name (GpgmeSigStat status)
183 case GPGME_SIG_STAT_NONE:
184 result = _("Oops: Signature not verified");
186 case GPGME_SIG_STAT_NOSIG:
187 result = _("No signature found");
189 case GPGME_SIG_STAT_GOOD:
190 result = _("Good signature from \"%s\"");
192 case GPGME_SIG_STAT_GOOD_EXP:
193 result = _("Good signature from \"%s\" but it has expired");
195 case GPGME_SIG_STAT_GOOD_EXPKEY:
196 result = _("Good signature from \"%s\" but the key has expired");
198 case GPGME_SIG_STAT_BAD:
199 result = _("BAD signature from \"%s\"");
201 case GPGME_SIG_STAT_NOKEY:
202 result = _("No public key to verify the signature");
204 case GPGME_SIG_STAT_ERROR:
205 result = _("Error verifying the signature");
207 case GPGME_SIG_STAT_DIFF:
208 result = _("Different results for signatures");
211 result = _("Error: Unknown status");
219 sig_status_for_key(GString *str, GpgmeCtx ctx, GpgmeSigStat status,
220 GpgmeKey key, const gchar *fpr)
225 uid = gpgme_key_get_string_attr (key, GPGME_ATTR_USERID, NULL, idx);
227 g_string_sprintfa (str, "%s\n",
228 sig_status_to_string (status));
229 if ((fpr != NULL) && (*fpr != '\0'))
230 g_string_sprintfa (str, "Key fingerprint: %s\n", fpr);
231 g_string_append (str, _("Cannot find user ID for this key."));
232 sig_expiration_check(str, ctx, key, status, 0);
235 g_string_sprintfa (str, sig_status_with_name (status), uid);
236 g_string_append (str, "\n");
239 uid = gpgme_key_get_string_attr (key, GPGME_ATTR_USERID,
243 g_string_sprintfa (str, _(" aka \"%s\"\n"),
246 sig_expiration_check(str, ctx, key, status, 0);
250 sig_expiration_check(GString *str, GpgmeCtx ctx, GpgmeKey key,
251 GpgmeSigStat status, int idx)
253 if (status == GPGME_SIG_STAT_GOOD_EXP)
254 sig_expired(str, ctx, idx);
255 else if (status == GPGME_SIG_STAT_GOOD_EXPKEY)
256 sig_key_expired(str, key, idx);
260 sig_expired(GString *str, GpgmeCtx ctx, int idx)
262 unsigned long exp_time;
263 exp_time = gpgme_get_sig_ulong_attr(ctx, idx, GPGME_ATTR_EXPIRE, 0);
264 g_string_sprintfa(str, _("Signature expired %s"), ctime(&exp_time));
268 sig_key_expired(GString *str, GpgmeKey key, int idx)
270 unsigned long exp_time;
271 exp_time = gpgme_key_get_ulong_attr(key, GPGME_ATTR_EXPIRE, NULL, idx);
272 g_string_sprintfa(str, _("Key expired %s"), ctime(&exp_time));
276 sig_status_full (GpgmeCtx ctx)
285 struct tm *ctime_val;
289 str = g_string_new ("");
291 fpr = gpgme_get_sig_status (ctx, sig_idx, &status, &created);
292 while (fpr != NULL) {
294 ctime_val = localtime (&created);
295 strftime (ctime_str, sizeof (ctime_str), "%c",
297 g_string_sprintfa (str,
298 _("Signature made at %s\n"),
301 err = gpgme_get_sig_key (ctx, sig_idx, &key);
303 g_string_sprintfa (str, "%s\n",
304 sig_status_to_string (status));
305 if ((fpr != NULL) && (*fpr != '\0'))
306 g_string_sprintfa (str,
307 _("Key fingerprint: %s\n"),
310 const char *key_id_str;
312 sig_status_for_key (str, ctx, status, key, fpr);
313 key_id_str = gpgme_key_get_string_attr(key,
314 GPGME_ATTR_KEYID, NULL, 0);
316 g_string_sprintfa (str, _("Key ID: %s\n"), key_id_str);
317 gpgme_key_unref (key);
319 g_string_append (str, "\n\n");
321 fpr = gpgme_get_sig_status (ctx, ++sig_idx, &status, &created);
325 g_string_free (str, FALSE);
329 static void check_signature (MimeInfo *mimeinfo, MimeInfo *partinfo, FILE *fp)
334 GpgmeData sig = NULL, text = NULL;
335 GpgmeSigStat status = GPGME_SIG_STAT_NONE;
336 GpgmegtkSigStatus statuswindow = NULL;
337 const char *result = NULL;
339 gint n_exclude_chars = 0;
341 if (prefs_common.gpg_signature_popup)
342 statuswindow = gpgmegtk_sig_status_create ();
344 err = gpgme_new (&ctx);
346 debug_print ("gpgme_new failed: %s\n", gpgme_strerror (err));
350 /* don't include the last empty line.
351 It does not belong to the signed text */
352 if (mimeinfo->children->length > 0) {
353 if (fseek(fp, mimeinfo->children->offset + mimeinfo->children->length - 1,
358 if (fgetc(fp) == '\n') {
360 if (mimeinfo->children->length > 1) {
361 if (fseek(fp, mimeinfo->children->offset + mimeinfo->children->length - 2,
366 if (fgetc(fp) == '\r')
372 /* canonicalize the file part. */
373 tmp_file = get_tmp_file();
374 if (copy_file_part(fp, mimeinfo->children->offset,
375 mimeinfo->children->length - n_exclude_chars,
380 if (canonicalize_file_replace(tmp_file) < 0) {
386 err = gpgme_data_new_from_file(&text, tmp_file, 1);
392 err = gpgme_data_new_from_filepart (&sig, NULL, fp,
393 partinfo->offset, partinfo->length);
395 debug_print ("gpgme_data_new_from_filepart failed: %s\n",
396 gpgme_strerror (err));
400 err = gpgme_op_verify (ctx, sig, text, &status);
402 debug_print ("gpgme_op_verify failed: %s\n", gpgme_strerror (err));
406 /* FIXME: check what the heck this sig_status_full stuff is.
407 * it should better go into sigstatus.c */
408 g_free (partinfo->sigstatus_full);
409 partinfo->sigstatus_full = sig_status_full (ctx);
412 result = gpgmegtk_sig_status_to_string(status);
413 debug_print("verification status: %s\n", result);
414 if (prefs_common.gpg_signature_popup)
415 gpgmegtk_sig_status_update (statuswindow, ctx);
417 g_free (partinfo->sigstatus);
418 partinfo->sigstatus = g_strdup (result);
419 partinfo->sig_ok = (status == GPGME_SIG_STAT_GOOD);
420 partinfo->sig_unknown = (status == GPGME_SIG_STAT_NOKEY);
421 partinfo->sig_expired = (status == GPGME_SIG_STAT_GOOD_EXP);
422 partinfo->key_expired = (status == GPGME_SIG_STAT_GOOD_EXPKEY);
424 gpgme_data_release (sig);
425 gpgme_data_release (text);
427 if (prefs_common.gpg_signature_popup)
428 gpgmegtk_sig_status_destroy (statuswindow);
433 * Copy a gpgme data object to a temporary file and
434 * return this filename
438 copy_gpgmedata_to_temp (GpgmeData data, guint *length)
447 tmp = g_strdup_printf("%s%cgpgtmp.%08x",
448 get_mime_tmp_dir(), G_DIR_SEPARATOR, ++id );
450 if ((fp = fopen(tmp, "wb")) == NULL) {
451 FILE_OP_ERROR(tmp, "fopen");
456 err = gpgme_data_rewind ( data );
458 debug_print ("gpgme_data_rewind failed: %s\n", gpgme_strerror (err));
460 while (!(err = gpgme_data_read (data, buf, 100, &nread))) {
461 fwrite ( buf, nread, 1, fp );
464 if (err != GPGME_EOF)
465 debug_print ("gpgme_data_read failed: %s\n", gpgme_strerror (err));
475 pgp_decrypt (MimeInfo *partinfo, FILE *fp)
479 GpgmeData cipher = NULL, plain = NULL;
480 struct passphrase_cb_info_s info;
482 memset (&info, 0, sizeof info);
484 err = gpgme_new (&ctx);
486 debug_print ("gpgme_new failed: %s\n", gpgme_strerror (err));
490 err = gpgme_data_new_from_filepart (&cipher, NULL, fp,
491 partinfo->offset, partinfo->length);
493 debug_print ("gpgme_data_new_from_filepart failed: %s\n",
494 gpgme_strerror (err));
498 err = gpgme_data_new (&plain);
500 debug_print ("gpgme_new failed: %s\n", gpgme_strerror (err));
504 if (!getenv("GPG_AGENT_INFO")) {
506 gpgme_set_passphrase_cb (ctx, gpgmegtk_passphrase_cb, &info);
509 err = gpgme_op_decrypt (ctx, cipher, plain);
512 gpgme_data_release (cipher);
514 gpgmegtk_free_passphrase();
515 debug_print ("decryption failed: %s\n", gpgme_strerror (err));
516 gpgme_data_release (plain);
520 debug_print ("** decryption succeeded\n");
526 MimeInfo * rfc2015_find_signature (MimeInfo *mimeinfo)
533 if (!((mimeinfo->type == MIMETYPE_MULTIPART) && !g_strcasecmp(mimeinfo->subtype, "signed")))
536 debug_print ("** multipart/signed encountered\n");
538 /* check that we have at least 2 parts of the correct type */
539 for (partinfo = mimeinfo->children;
540 partinfo != NULL; partinfo = partinfo->next) {
541 if (++n > 1 && (partinfo->type == MIMETYPE_APPLICATION &&
542 !g_strcasecmp (partinfo->subtype, "pgp-signature")))
549 gboolean rfc2015_has_signature (MimeInfo *mimeinfo)
551 return rfc2015_find_signature (mimeinfo) != NULL;
554 void rfc2015_check_signature (MimeInfo *mimeinfo, FILE *fp)
558 partinfo = rfc2015_find_signature (mimeinfo);
563 g_message ("** yep, it is a pgp signature");
564 dump_mimeinfo ("gpg-signature", partinfo );
565 dump_part (partinfo, fp );
566 dump_mimeinfo ("signed text", mimeinfo->children );
567 dump_part (mimeinfo->children, fp);
570 check_signature (mimeinfo, partinfo, fp);
573 int rfc2015_is_encrypted (MimeInfo *mimeinfo)
575 if (!mimeinfo || mimeinfo->type != MIMETYPE_MULTIPART)
577 if (g_strcasecmp (mimeinfo->subtype, "encrypted"))
579 /* fixme: we should check the protocol parameter */
583 gboolean rfc2015_msg_is_encrypted (const gchar *file)
590 if ((fp = fopen(file, "rb")) == NULL)
593 mimeinfo = procmime_scan_mime_header(fp);
599 ret = rfc2015_is_encrypted(mimeinfo);
600 procmime_mimeinfo_free_all(mimeinfo);
602 return ret != 0 ? TRUE : FALSE;
606 name_cmp(const char *a, const char *b)
608 for( ; *a && *b; a++, b++) {
610 && toupper(*(unsigned char *)a) != toupper(*(unsigned char *)b))
618 headerp(char *p, char **names)
627 if(p2[-1] == ' ' || p2[-1] == '\t') {
636 for(i = 0 ; names[i] != NULL; i++) {
637 if(!name_cmp (names[i], p))
642 return names[i] != NULL;
646 #define DECRYPTION_ABORT() \
648 procmime_mimeinfo_free_all(tmpinfo); \
649 msginfo->decryption_failed = 1; \
653 void rfc2015_decrypt_message (MsgInfo *msginfo, MimeInfo *mimeinfo, FILE *fp)
656 MimeInfo *tmpinfo, *partinfo;
666 g_return_if_fail (msginfo != NULL);
667 g_return_if_fail (mimeinfo != NULL);
668 g_return_if_fail (fp != NULL);
669 g_return_if_fail (mimeinfo->type == MIMETYPE_MULTIPART);
671 debug_print ("** decrypting multipart/encrypted message\n");
676 if (fseek(fp, mimeinfo->offset, SEEK_SET) < 0)
678 tmpinfo = procmime_scan_mime_header(fp);
679 if (!tmpinfo || tmpinfo->type != MIMETYPE_MULTIPART) {
683 procmime_scan_message(tmpinfo);
685 /* check that we have the 2 parts */
686 partinfo = tmpinfo->children;
687 if (!partinfo || !partinfo->next) {
690 if ((partinfo->type == MIMETYPE_APPLICATION) && !g_strcasecmp(partinfo->subtype, "pgp-encrypted")) {
691 /* Fixme: check that the version is 1 */
694 partinfo = partinfo->next;
695 if (ver_ok && (partinfo->type == MIMETYPE_APPLICATION) &&
696 !g_strcasecmp (partinfo->subtype, "octet-stream")) {
698 g_warning ("oops: pgp_encrypted with more than 2 parts");
704 debug_print ("** yep, it is pgp encrypted\n");
706 plain = pgp_decrypt (partinfo, fp);
711 fname = g_strdup_printf("%s%cplaintext.%08x",
712 get_mime_tmp_dir(), G_DIR_SEPARATOR, ++id);
714 if ((dstfp = fopen(fname, "wb")) == NULL) {
715 FILE_OP_ERROR(fname, "fopen");
720 /* write the orginal header to the new file */
721 if (fseek(fp, tmpinfo->offset, SEEK_SET) < 0)
725 while (fgets(buf, sizeof(buf), fp)) {
726 if (headerp (buf, content_names)) {
731 if (buf[0] == ' ' || buf[0] == '\t')
735 if (buf[0] == '\r' || buf[0] == '\n')
740 err = gpgme_data_rewind (plain);
742 debug_print ("gpgme_data_rewind failed: %s\n", gpgme_strerror (err));
744 while (!(err = gpgme_data_read (plain, buf, sizeof(buf), &nread))) {
745 fwrite (buf, nread, 1, dstfp);
748 if (err != GPGME_EOF) {
749 debug_print ("gpgme_data_read failed: %s\n", gpgme_strerror (err));
753 procmime_mimeinfo_free_all(tmpinfo);
755 msginfo->plaintext_file = fname;
756 msginfo->decryption_failed = 0;
761 #undef DECRYPTION_ABORT
765 * plain contains an entire mime object.
766 * Encrypt it and return an GpgmeData object with the encrypted version of
767 * the file or NULL in case of error.
770 pgp_encrypt ( GpgmeData plain, GpgmeRecipients rset )
774 GpgmeData cipher = NULL;
776 err = gpgme_new (&ctx);
778 err = gpgme_data_new (&cipher);
780 gpgme_set_armor (ctx, 1);
781 err = gpgme_op_encrypt (ctx, rset, plain, cipher);
785 debug_print ("encryption failed: %s\n", gpgme_strerror (err));
786 gpgme_data_release (cipher);
790 debug_print ("** encryption succeeded\n");
798 * Create and return a list of keys matching a key id
801 GSList *rfc2015_create_signers_list (const char *keyid)
803 GSList *key_list = NULL;
804 GpgmeCtx list_ctx = NULL;
809 err = gpgme_new (&list_ctx);
812 err = gpgme_op_keylist_start (list_ctx, keyid, 1);
815 while ( !(err = gpgme_op_keylist_next (list_ctx, &key)) ) {
816 key_list = g_slist_append (key_list, key);
818 if (err != GPGME_EOF)
821 if (key_list == NULL) {
822 debug_print ("no keys found for keyid \"%s\"\n", keyid);
827 debug_print ("rfc2015_create_signers_list failed: %s\n", gpgme_strerror (err));
828 for (p = key_list; p != NULL; p = p->next)
829 gpgme_key_unref ((GpgmeKey) p->data);
830 g_slist_free (key_list);
833 gpgme_release (list_ctx);
834 return err ? NULL : key_list;
838 * Encrypt the file by extracting all recipients and finding the
839 * encryption keys for all of them. The file content is then replaced
840 * by the encrypted one. */
842 rfc2015_encrypt (const char *file, GSList *recp_list, gboolean ascii_armored)
846 int i, clineidx, saved_last;
847 char *clines[3] = {NULL};
849 GpgmeData header = NULL;
850 GpgmeData plain = NULL;
851 GpgmeData cipher = NULL;
852 GpgmeRecipients rset = NULL;
854 int mime_version_seen = 0;
857 boundary = generate_mime_boundary ("Encrypt");
859 /* Create the list of recipients */
860 rset = gpgmegtk_recipient_selection (recp_list);
862 debug_print ("error creating recipient list\n" );
866 /* Open the source file */
867 if ((fp = fopen(file, "rb")) == NULL) {
868 FILE_OP_ERROR(file, "fopen");
872 err = gpgme_data_new (&header);
874 err = gpgme_data_new (&plain);
876 debug_print ("gpgme_data_new failed: %s\n", gpgme_strerror (err));
880 /* get the content header lines from the source */
883 while (!err && fgets(buf, sizeof(buf), fp)) {
884 /* fixme: check for overlong lines */
885 if (headerp (buf, content_names)) {
886 if (clineidx >= DIM (clines)) {
887 debug_print ("rfc2015_encrypt: too many content lines\n");
890 clines[clineidx++] = g_strdup (buf);
895 if (*buf == ' ' || *buf == '\t') {
896 char *last = clines[clineidx - 1];
897 clines[clineidx - 1] = g_strconcat (last, buf, NULL);
904 if (headerp (buf, mime_version_name))
905 mime_version_seen = 1;
907 if (buf[0] == '\r' || buf[0] == '\n')
909 err = gpgme_data_write (header, buf, strlen (buf));
912 FILE_OP_ERROR (file, "fgets");
916 /* write them to the temp data and add the rest of the message */
917 for (i = 0; !err && i < clineidx; i++) {
918 debug_print ("%% %s:%d: cline=`%s'", __FILE__ ,__LINE__, clines[i]);
919 err = gpgme_data_write (plain, clines[i], strlen (clines[i]));
922 err = gpgme_data_write (plain, "\r\n", 2);
923 while (!err && fgets(buf, sizeof(buf), fp)) {
924 err = gpgme_data_write (plain, buf, strlen (buf));
927 FILE_OP_ERROR (file, "fgets");
931 debug_print ("gpgme_data_write failed: %s\n", gpgme_strerror (err));
935 cipher = pgp_encrypt (plain, rset);
936 gpgme_data_release (plain); plain = NULL;
937 gpgme_recipients_release (rset); rset = NULL;
941 /* we have the encrypted message available in cipher and now we
942 * are going to rewrite the source file. To be sure that file has
943 * been truncated we use an approach which should work everywhere:
944 * close the file and then reopen it for writing. It is important
945 * that this works, otherwise it may happen that parts of the
946 * plaintext are still in the file (The encrypted stuff is, due to
947 * compression, usually shorter than the plaintext).
949 * Yes, there is a race condition here, but everyone, who is so
950 * stupid to store the temp file with the plaintext in a public
951 * directory has to live with this anyway. */
953 FILE_OP_ERROR(file, "fclose");
956 if ((fp = fopen(file, "wb")) == NULL) {
957 FILE_OP_ERROR(file, "fopen");
961 /* Write the header, append new content lines, part 1 and part 2 header */
962 err = gpgme_data_rewind (header);
964 debug_print ("gpgme_data_rewind failed: %s\n", gpgme_strerror (err));
967 while (!(err = gpgme_data_read (header, buf, BUFFSIZE, &nread))) {
968 fwrite (buf, nread, 1, fp);
970 if (err != GPGME_EOF) {
971 debug_print ("gpgme_data_read failed: %s\n", gpgme_strerror (err));
975 FILE_OP_ERROR (file, "fwrite");
978 gpgme_data_release (header); header = NULL;
980 if (!mime_version_seen)
981 fputs ("MIME-Version: 1\r\n", fp);
985 "Content-Type: text/plain; charset=US-ASCII\r\n"
986 "Content-Transfer-Encoding: 7bit\r\n"
990 "Content-Type: multipart/encrypted;"
991 " protocol=\"application/pgp-encrypted\";\r\n"
992 " boundary=\"%s\"\r\n"
995 "Content-Type: application/pgp-encrypted\r\n"
1000 "Content-Type: application/octet-stream\r\n"
1002 boundary, boundary, boundary);
1005 /* append the encrypted stuff */
1006 err = gpgme_data_rewind (cipher);
1008 debug_print ("** gpgme_data_rewind on cipher failed: %s\n",
1009 gpgme_strerror (err));
1013 while (!(err = gpgme_data_read (cipher, buf, BUFFSIZE, &nread))) {
1014 fwrite (buf, nread, 1, fp);
1016 if (err != GPGME_EOF) {
1017 debug_print ("** gpgme_data_read failed: %s\n", gpgme_strerror (err));
1021 /* and the final boundary */
1022 if (!ascii_armored) {
1030 FILE_OP_ERROR (file, "fwrite");
1034 gpgme_data_release (cipher);
1040 gpgme_data_release (header);
1041 gpgme_data_release (plain);
1042 gpgme_data_release (cipher);
1043 gpgme_recipients_release (rset);
1045 return -1; /* error */
1049 * plain contains an entire mime object. Sign it and return an
1050 * GpgmeData object with the signature of it or NULL in case of error.
1051 * r_siginfo returns an XML object with information about the signature.
1054 pgp_sign (GpgmeData plain, GSList *key_list, gboolean clearsign,
1058 GpgmeCtx ctx = NULL;
1060 GpgmeData sig = NULL;
1061 struct passphrase_cb_info_s info;
1064 memset (&info, 0, sizeof info);
1066 err = gpgme_new (&ctx);
1069 err = gpgme_data_new (&sig);
1073 if (!getenv("GPG_AGENT_INFO")) {
1075 gpgme_set_passphrase_cb (ctx, gpgmegtk_passphrase_cb, &info);
1077 gpgme_set_textmode (ctx, 1);
1078 gpgme_set_armor (ctx, 1);
1079 gpgme_signers_clear (ctx);
1080 for (p = key_list; p != NULL; p = p->next) {
1081 err = gpgme_signers_add (ctx, (GpgmeKey) p->data);
1085 for (p = key_list; p != NULL; p = p->next)
1086 gpgme_key_unref ((GpgmeKey) p->data);
1087 g_slist_free (key_list);
1093 clearsign ? GPGME_SIG_MODE_CLEAR : GPGME_SIG_MODE_DETACH);
1095 *r_siginfo = gpgme_get_op_info (ctx, 0);
1099 gpgmegtk_free_passphrase();
1100 debug_print ("signing failed: %s\n", gpgme_strerror (err));
1101 gpgme_data_release (sig);
1105 debug_print ("signing succeeded\n");
1108 gpgme_release (ctx);
1113 * Find TAG in XML and return a pointer into xml set just behind the
1114 * closing angle. Return NULL if not found.
1117 find_xml_tag (const char *xml, const char *tag)
1119 int taglen = strlen (tag);
1120 const char *s = xml;
1122 while ( (s = strchr (s, '<')) ) {
1124 if (!strncmp (s, tag, taglen)) {
1125 const char *s2 = s + taglen;
1126 if (*s2 == '>' || isspace (*(const unsigned char*)s2) ) {
1128 while (*s2 && *s2 != '>') /* skip attributes */
1130 /* fixme: do need to handle angles inside attribute vallues? */
1131 return *s2? (s2+1):NULL;
1134 while (*s && *s != '>') /* skip to end of tag */
1142 * Extract the micalg from an GnupgOperationInfo XML container.
1145 extract_micalg (char *xml)
1149 s = find_xml_tag (xml, "GnupgOperationInfo");
1151 const char *s_end = find_xml_tag (s, "/GnupgOperationInfo");
1152 s = find_xml_tag (s, "signature");
1153 if (s && s_end && s < s_end) {
1154 const char *s_end2 = find_xml_tag (s, "/signature");
1155 if (s_end2 && s_end2 < s_end) {
1156 s = find_xml_tag (s, "micalg");
1157 if (s && s < s_end2) {
1158 s_end = strchr (s, '<');
1160 char *p = g_malloc (s_end - s + 1);
1161 memcpy (p, s, s_end - s);
1174 * Sign the file and replace its content with the signed one.
1177 rfc2015_sign (const char *file, GSList *key_list)
1181 int i, clineidx, saved_last;
1182 char *clines[3] = {NULL};
1184 GpgmeData header = NULL;
1185 GpgmeData plain = NULL;
1186 GpgmeData sigdata = NULL;
1188 int mime_version_seen = 0;
1190 char *micalg = NULL;
1193 boundary = generate_mime_boundary ("Signature");
1195 /* Open the source file */
1196 if ((fp = fopen(file, "rb")) == NULL) {
1197 FILE_OP_ERROR(file, "fopen");
1201 err = gpgme_data_new (&header);
1203 err = gpgme_data_new (&plain);
1205 debug_print ("gpgme_data_new failed: %s\n", gpgme_strerror (err));
1209 /* get the content header lines from the source */
1212 while (!err && fgets(buf, sizeof(buf), fp)) {
1213 /* fixme: check for overlong lines */
1214 if (headerp (buf, content_names)) {
1215 if (clineidx >= DIM (clines)) {
1216 debug_print ("rfc2015_sign: too many content lines\n");
1219 clines[clineidx++] = g_strdup (buf);
1224 if (*buf == ' ' || *buf == '\t') {
1225 char *last = clines[clineidx - 1];
1226 clines[clineidx - 1] = g_strconcat (last, buf, NULL);
1233 if (headerp (buf, mime_version_name))
1234 mime_version_seen = 1;
1236 if (buf[0] == '\r' || buf[0] == '\n')
1238 err = gpgme_data_write (header, buf, strlen (buf));
1241 FILE_OP_ERROR (file, "fgets");
1245 /* write them to the temp data and add the rest of the message */
1246 for (i = 0; !err && i < clineidx; i++) {
1247 err = gpgme_data_write (plain, clines[i], strlen (clines[i]));
1250 err = gpgme_data_write (plain, "\r\n", 2 );
1251 while (!err && fgets(buf, sizeof(buf), fp)) {
1252 err = gpgme_data_write (plain, buf, strlen (buf));
1255 FILE_OP_ERROR (file, "fgets");
1259 debug_print ("gpgme_data_write failed: %s\n", gpgme_strerror (err));
1263 sigdata = pgp_sign (plain, key_list, FALSE, &siginfo);
1265 micalg = extract_micalg (siginfo);
1271 /* we have the signed message available in sigdata and now we are
1272 * going to rewrite the original file. To be sure that file has
1273 * been truncated we use an approach which should work everywhere:
1274 * close the file and then reopen it for writing. */
1276 FILE_OP_ERROR(file, "fclose");
1279 if ((fp = fopen(file, "wb")) == NULL) {
1280 FILE_OP_ERROR(file, "fopen");
1284 /* Write the rfc822 header and add new content lines */
1285 err = gpgme_data_rewind (header);
1287 debug_print ("gpgme_data_rewind failed: %s\n", gpgme_strerror (err));
1288 while (!(err = gpgme_data_read (header, buf, BUFFSIZE, &nread))) {
1289 fwrite (buf, nread, 1, fp);
1291 if (err != GPGME_EOF) {
1292 debug_print ("gpgme_data_read failed: %s\n", gpgme_strerror (err));
1296 FILE_OP_ERROR (file, "fwrite");
1299 gpgme_data_release (header);
1302 if (!mime_version_seen)
1303 fputs ("MIME-Version: 1.0\r\n", fp);
1304 fprintf (fp, "Content-Type: multipart/signed; "
1305 "protocol=\"application/pgp-signature\";\r\n");
1307 fprintf (fp, " micalg=\"%s\";\r\n", micalg);
1308 fprintf (fp, " boundary=\"%s\"\r\n", boundary);
1310 /* Part 1: signed material */
1314 err = gpgme_data_rewind (plain);
1316 debug_print ("gpgme_data_rewind on plain failed: %s\n",
1317 gpgme_strerror (err));
1320 while (!(err = gpgme_data_read (plain, buf, BUFFSIZE, &nread))) {
1321 fwrite (buf, nread, 1, fp);
1323 if (err != GPGME_EOF) {
1324 debug_print ("gpgme_data_read failed: %s\n", gpgme_strerror (err));
1328 /* Part 2: signature */
1332 fputs ("Content-Type: application/pgp-signature\r\n"
1335 err = gpgme_data_rewind (sigdata);
1337 debug_print ("gpgme_data_rewind on sigdata failed: %s\n",
1338 gpgme_strerror (err));
1342 while (!(err = gpgme_data_read (sigdata, buf, BUFFSIZE, &nread))) {
1343 fwrite (buf, nread, 1, fp);
1345 if (err != GPGME_EOF) {
1346 debug_print ("gpgme_data_read failed: %s\n", gpgme_strerror (err));
1350 /* Final boundary */
1356 FILE_OP_ERROR (file, "fwrite");
1360 gpgme_data_release (header);
1361 gpgme_data_release (plain);
1362 gpgme_data_release (sigdata);
1370 gpgme_data_release (header);
1371 gpgme_data_release (plain);
1372 gpgme_data_release (sigdata);
1375 return -1; /* error */
1380 * Sign the file with clear text and replace its content with the signed one.
1383 rfc2015_clearsign (const gchar *file, GSList *key_list)
1386 gchar buf[BUFFSIZE];
1388 GpgmeData text = NULL;
1389 GpgmeData sigdata = NULL;
1393 if ((fp = fopen(file, "rb")) == NULL) {
1394 FILE_OP_ERROR(file, "fopen");
1398 err = gpgme_data_new(&text);
1400 debug_print("gpgme_data_new failed: %s\n", gpgme_strerror(err));
1404 while (!err && fgets(buf, sizeof(buf), fp)) {
1405 err = gpgme_data_write(text, buf, strlen(buf));
1408 FILE_OP_ERROR(file, "fgets");
1412 debug_print("gpgme_data_write failed: %s\n", gpgme_strerror(err));
1416 sigdata = pgp_sign(text, key_list, TRUE, &siginfo);
1423 if (fclose(fp) == EOF) {
1424 FILE_OP_ERROR(file, "fclose");
1428 if ((fp = fopen(file, "wb")) == NULL) {
1429 FILE_OP_ERROR(file, "fopen");
1433 err = gpgme_data_rewind(sigdata);
1435 debug_print("gpgme_data_rewind on sigdata failed: %s\n",
1436 gpgme_strerror(err));
1440 while (!(err = gpgme_data_read(sigdata, buf, sizeof(buf), &nread))) {
1441 fwrite(buf, nread, 1, fp);
1443 if (err != GPGME_EOF) {
1444 debug_print("gpgme_data_read failed: %s\n", gpgme_strerror(err));
1448 if (fclose(fp) == EOF) {
1449 FILE_OP_ERROR(file, "fclose");
1453 gpgme_data_release(text);
1454 gpgme_data_release(sigdata);
1460 gpgme_data_release(text);
1461 gpgme_data_release(sigdata);
1465 #endif /* USE_GPGME */