2 * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
3 * Copyright (C) 1999-2003 Hiroyuki Yamamoto & the Sylpheed-Claws team
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.
35 #include "prefs_common.h"
37 typedef struct _PrivacyDataPGP PrivacyDataPGP;
39 struct _PrivacyDataPGP
43 gboolean done_sigtest;
45 GpgmeSigStat sigstatus;
49 static PrivacySystem pgpmime_system;
51 static gint pgpmime_check_signature(MimeInfo *mimeinfo);
53 static PrivacyDataPGP *pgpmime_new_privacydata()
57 data = g_new0(PrivacyDataPGP, 1);
58 data->data.system = &pgpmime_system;
59 data->done_sigtest = FALSE;
60 data->is_signed = FALSE;
61 data->sigstatus = GPGME_SIG_STAT_NONE;
62 gpgme_new(&data->ctx);
67 static void pgpmime_free_privacydata(PrivacyData *_data)
69 PrivacyDataPGP *data = (PrivacyDataPGP *) _data;
74 static gboolean pgpmime_is_signed(MimeInfo *mimeinfo)
78 const gchar *protocol;
79 PrivacyDataPGP *data = NULL;
81 g_return_val_if_fail(mimeinfo != NULL, FALSE);
82 if (mimeinfo->privacy != NULL) {
83 data = (PrivacyDataPGP *) mimeinfo->privacy;
84 if (data->done_sigtest)
85 return data->is_signed;
89 parent = procmime_mimeinfo_parent(mimeinfo);
92 if ((parent->type != MIMETYPE_MULTIPART) ||
93 g_strcasecmp(parent->subtype, "signed"))
95 protocol = procmime_mimeinfo_get_parameter(parent, "protocol");
96 if ((protocol == NULL) || g_strcasecmp(protocol, "application/pgp-signature"))
99 /* check if mimeinfo is the first child */
100 if (parent->node->children->data != mimeinfo)
103 /* check signature */
104 signature = parent->node->children->next != NULL ?
105 (MimeInfo *) parent->node->children->next->data : NULL;
106 if (signature == NULL)
108 if ((signature->type != MIMETYPE_APPLICATION) ||
109 g_strcasecmp(signature->subtype, "pgp-signature"))
113 data = pgpmime_new_privacydata();
114 mimeinfo->privacy = (PrivacyData *) data;
116 data->done_sigtest = TRUE;
117 data->is_signed = TRUE;
122 static gint pgpmime_check_signature(MimeInfo *mimeinfo)
124 PrivacyDataPGP *data;
125 MimeInfo *parent, *signature;
131 GpgmeData sigdata, textdata;
133 g_return_val_if_fail(mimeinfo != NULL, -1);
134 g_return_val_if_fail(mimeinfo->privacy != NULL, -1);
135 data = (PrivacyDataPGP *) mimeinfo->privacy;
137 debug_print("Checking PGP/MIME signature\n");
138 parent = procmime_mimeinfo_parent(mimeinfo);
140 fp = fopen(parent->filename, "rb");
141 g_return_val_if_fail(fp != NULL, SIGNATURE_INVALID);
143 boundary = g_hash_table_lookup(parent->parameters, "boundary");
147 boundary_len = strlen(boundary);
148 while (fgets(buf, sizeof(buf), fp) != NULL)
149 if (IS_BOUNDARY(buf, boundary, boundary_len))
152 textstr = g_string_new("");
153 while (fgets(buf, sizeof(buf), fp) != NULL) {
156 if (IS_BOUNDARY(buf, boundary, boundary_len))
159 buf2 = canonicalize_str(buf);
160 g_string_append(textstr, buf2);
163 g_string_truncate(textstr, textstr->len - 2);
165 gpgme_data_new_from_mem(&textdata, textstr->str, textstr->len, 0);
166 signature = (MimeInfo *) mimeinfo->node->next->data;
167 sigdata = sgpgme_data_from_mimeinfo(signature);
170 sgpgme_verify_signature (data->ctx, sigdata, textdata);
172 gpgme_data_release(sigdata);
173 gpgme_data_release(textdata);
174 g_string_free(textstr, TRUE);
180 static SignatureStatus pgpmime_get_sig_status(MimeInfo *mimeinfo)
182 PrivacyDataPGP *data = (PrivacyDataPGP *) mimeinfo->privacy;
184 g_return_val_if_fail(data != NULL, SIGNATURE_INVALID);
186 if (data->sigstatus == GPGME_SIG_STAT_NONE &&
187 prefs_common.auto_check_signatures)
188 pgpmime_check_signature(mimeinfo);
190 return sgpgme_sigstat_gpgme_to_privacy(data->ctx, data->sigstatus);
193 static gchar *pgpmime_get_sig_info_short(MimeInfo *mimeinfo)
195 PrivacyDataPGP *data = (PrivacyDataPGP *) mimeinfo->privacy;
197 g_return_val_if_fail(data != NULL, g_strdup("Error"));
199 if (data->sigstatus == GPGME_SIG_STAT_NONE &&
200 prefs_common.auto_check_signatures)
201 pgpmime_check_signature(mimeinfo);
203 return sgpgme_sigstat_info_short(data->ctx, data->sigstatus);
206 static gchar *pgpmime_get_sig_info_full(MimeInfo *mimeinfo)
208 PrivacyDataPGP *data = (PrivacyDataPGP *) mimeinfo->privacy;
210 g_return_val_if_fail(data != NULL, g_strdup("Error"));
212 if (data->sigstatus == GPGME_SIG_STAT_NONE &&
213 prefs_common.auto_check_signatures)
214 pgpmime_check_signature(mimeinfo);
216 return sgpgme_sigstat_info_full(data->ctx, data->sigstatus);
219 static gboolean pgpmime_is_encrypted(MimeInfo *mimeinfo)
224 if (mimeinfo->type != MIMETYPE_MULTIPART)
226 if (g_strcasecmp(mimeinfo->subtype, "encrypted"))
228 tmpstr = procmime_mimeinfo_get_parameter(mimeinfo, "protocol");
229 if ((tmpstr == NULL) || g_strcasecmp(tmpstr, "application/pgp-encrypted"))
231 if (g_node_n_children(mimeinfo->node) != 2)
234 tmpinfo = (MimeInfo *) g_node_nth_child(mimeinfo->node, 0)->data;
235 if (tmpinfo->type != MIMETYPE_APPLICATION)
237 if (g_strcasecmp(tmpinfo->subtype, "pgp-encrypted"))
240 tmpinfo = (MimeInfo *) g_node_nth_child(mimeinfo->node, 1)->data;
241 if (tmpinfo->type != MIMETYPE_APPLICATION)
243 if (g_strcasecmp(tmpinfo->subtype, "octet-stream"))
249 static MimeInfo *pgpmime_decrypt(MimeInfo *mimeinfo)
251 MimeInfo *encinfo, *decinfo, *parseinfo;
252 GpgmeData cipher, plain;
258 GpgmeSigStat sigstat = 0;
259 PrivacyDataPGP *data = NULL;
262 if (gpgme_new(&ctx) != GPGME_No_Error)
266 g_return_val_if_fail(pgpmime_is_encrypted(mimeinfo), NULL);
268 encinfo = (MimeInfo *) g_node_nth_child(mimeinfo->node, 1)->data;
270 cipher = sgpgme_data_from_mimeinfo(encinfo);
271 plain = sgpgme_decrypt_verify(cipher, &sigstat, ctx);
273 gpgme_data_release(cipher);
277 fname = g_strdup_printf("%s%cplaintext.%08x",
278 get_mime_tmp_dir(), G_DIR_SEPARATOR, ++id);
280 if ((dstfp = fopen(fname, "wb")) == NULL) {
281 FILE_OP_ERROR(fname, "fopen");
283 gpgme_data_release(plain);
287 fprintf(dstfp, "MIME-Version: 1.0\n");
288 gpgme_data_rewind (plain);
289 while (gpgme_data_read(plain, buf, sizeof(buf), &nread) == GPGME_No_Error) {
290 fwrite (buf, nread, 1, dstfp);
294 gpgme_data_release(plain);
296 parseinfo = procmime_scan_file(fname);
298 if (parseinfo == NULL)
300 decinfo = g_node_first_child(parseinfo->node) != NULL ?
301 g_node_first_child(parseinfo->node)->data : NULL;
305 g_node_unlink(decinfo->node);
306 procmime_mimeinfo_free_all(parseinfo);
308 decinfo->tmpfile = TRUE;
310 if (sigstat != GPGME_SIG_STAT_NONE) {
311 if (decinfo->privacy != NULL) {
312 data = (PrivacyDataPGP *) decinfo->privacy;
314 data = pgpmime_new_privacydata();
315 decinfo->privacy = (PrivacyData *) data;
317 data->done_sigtest = TRUE;
318 data->is_signed = TRUE;
319 data->sigstatus = sigstat;
321 gpgme_release(data->ctx);
329 static PrivacySystem pgpmime_system = {
331 "PGP Mime", /* name */
333 pgpmime_free_privacydata, /* free_privacydata */
335 pgpmime_is_signed, /* is_signed(MimeInfo *) */
336 pgpmime_check_signature, /* check_signature(MimeInfo *) */
337 pgpmime_get_sig_status, /* get_sig_status(MimeInfo *) */
338 pgpmime_get_sig_info_short, /* get_sig_info_short(MimeInfo *) */
339 pgpmime_get_sig_info_full, /* get_sig_info_full(MimeInfo *) */
341 pgpmime_is_encrypted, /* is_encrypted(MimeInfo *) */
342 pgpmime_decrypt, /* decrypt(MimeInfo *) */
347 privacy_register_system(&pgpmime_system);
352 privacy_unregister_system(&pgpmime_system);
355 #endif /* USE_GPGME */