/*
* e-mail-parser-multipart-signed.c
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) version 3.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with the program; if not, see <http://www.gnu.org/licenses/>
*
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <em-format/e-mail-parser-extension.h>
#include <em-format/e-mail-parser.h>
#include <em-format/e-mail-part-utils.h>
#include <glib/gi18n-lib.h>
#include <camel/camel.h>
#include <libedataserver/libedataserver.h>
typedef EMailParserExtension EMailParserMultipartSigned;
typedef EMailParserExtensionClass EMailParserMultipartSignedClass;
GType e_mail_parser_multipart_signed_get_type (void);
G_DEFINE_TYPE (
EMailParserMultipartSigned,
e_mail_parser_multipart_signed,
E_TYPE_MAIL_PARSER_EXTENSION)
static const gchar *parser_mime_types[] = {
"multipart/signed",
"application/pgp-signature",
NULL
};
static gboolean
empe_mp_signed_parse (EMailParserExtension *extension,
EMailParser *parser,
CamelMimePart *part,
GString *part_id,
GCancellable *cancellable,
GQueue *out_mail_parts)
{
CamelMimePart *cpart;
CamelMultipartSigned *mps;
CamelCipherContext *cipher = NULL;
CamelSession *session;
guint32 validity_type;
CamelCipherValidity *valid;
GError *local_error = NULL;
gint i, nparts, len;
gboolean secured;
/* If the part is application/pgp-signature sub-part then skip it. */
if (!CAMEL_IS_MULTIPART (part)) {
CamelContentType *ct;
ct = camel_mime_part_get_content_type (CAMEL_MIME_PART (part));
if (camel_content_type_is (ct, "application", "pgp-signature")) {
return TRUE;
}
}
mps = (CamelMultipartSigned *) camel_medium_get_content ((CamelMedium *) part);
if (!CAMEL_IS_MULTIPART_SIGNED (mps)
|| (
cpart = camel_multipart_get_part (
(CamelMultipart *) mps,
CAMEL_MULTIPART_SIGNED_CONTENT)) == NULL) {
e_mail_parser_error (
parser, out_mail_parts,
_("Could not parse MIME message. "
"Displaying as source."));
e_mail_parser_parse_part_as (
parser, part, part_id,
"application/vnd.evolution.source",
cancellable, out_mail_parts);
return TRUE;
}
session = e_mail_parser_get_session (parser);
/* FIXME: Should be done via a plugin interface */
/* FIXME: duplicated in em-format-html-display.c */
if (mps->protocol) {
#ifdef ENABLE_SMIME
if (g_ascii_strcasecmp ("application/x-pkcs7-signature", mps->protocol) == 0
|| g_ascii_strcasecmp ("application/pkcs7-signature", mps->protocol) == 0) {
cipher = camel_smime_context_new (session);
validity_type = E_MAIL_PART_VALIDITY_SMIME;
} else {
#endif
if (g_ascii_strcasecmp ("application/pgp-signature", mps->protocol) == 0) {
cipher = camel_gpg_context_new (session);
validity_type = E_MAIL_PART_VALIDITY_PGP;
}
#ifdef ENABLE_SMIME
}
#endif
}
if (cipher == NULL) {
e_mail_parser_error (
parser, out_mail_parts,
_("Unsupported signature format"));
e_mail_parser_parse_part_as (
parser, part, part_id, "multipart/mixed",
cancellable, out_mail_parts);
return TRUE;
}
valid = camel_cipher_context_verify_sync (
cipher, part, cancellable, &local_error);
if (local_error != NULL) {
e_mail_parser_error (
parser, out_mail_parts,
_("Error verifying signature: %s"),
local_error->message);
e_mail_parser_parse_part_as (
parser, part, part_id, "multipart/mixed",
cancellable, out_mail_parts);
g_object_unref (cipher);
g_error_free (local_error);
return TRUE;
}
nparts = camel_multipart_get_number (CAMEL_MULTIPART (mps));
secured = FALSE;
len = part_id->len;
for (i = 0; i < nparts; i++) {
GQueue work_queue = G_QUEUE_INIT;
GList *head, *link;
CamelMimePart *subpart;
subpart = camel_multipart_get_part (CAMEL_MULTIPART (mps), i);
g_string_append_printf (part_id, ".signed.%d", i);
e_mail_parser_parse_part (
parser, subpart, part_id, cancellable, &work_queue);
g_string_truncate (part_id, len);
if (!secured)
secured = e_mail_part_is_secured (subpart);
head = g_queue_peek_head_link (&work_queue);
for (link = head; link != NULL; link = g_list_next (link)) {
EMailPart *mail_part = link->data;
e_mail_part_update_validity (
mail_part, valid,
validity_type | E_MAIL_PART_VALIDITY_SIGNED);
}
e_queue_transfer (&work_queue, out_mail_parts);
}
/* Add a widget with details about the encryption, but only when
* the encrypted isn't itself secured, in that case it has created
* the button itself. */
if (!secured) {
GQueue work_queue = G_QUEUE_INIT;
EMailPart *mail_part;
g_string_append (part_id, ".signed.button");
e_mail_parser_parse_part_as (
parser, part, part_id,
"application/vnd.evolution.widget.secure-button",
cancellable, &work_queue);
mail_part = g_queue_peek_head (&work_queue);
if (mail_part != NULL)
e_mail_part_update_validity (
mail_part, valid,
validity_type | E_MAIL_PART_VALIDITY_SIGNED);
e_queue_transfer (&work_queue, out_mail_parts);
g_string_truncate (part_id, len);
}
camel_cipher_validity_free (valid);
g_object_unref (cipher);
return TRUE;
}
static void
e_mail_parser_multipart_signed_class_init (EMailParserExtensionClass *class)
{
class->mime_types = parser_mime_types;
class->parse = empe_mp_signed_parse;
}
static void
e_mail_parser_multipart_signed_init (EMailParserExtension *extension)
{
}