/*
* 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 "e-mail-format-extensions.h"
#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>
typedef struct _EMailParserMultipartSigned {
GObject parent;
} EMailParserMultipartSigned;
typedef struct _EMailParserMultipartSignedClass {
GObjectClass parent_class;
} EMailParserMultipartSignedClass;
static void e_mail_parser_parser_extension_interface_init (EMailParserExtensionInterface *iface);
static void e_mail_parser_mail_extension_interface_init (EMailExtensionInterface *iface);
G_DEFINE_TYPE_EXTENDED (
EMailParserMultipartSigned,
e_mail_parser_multipart_signed,
G_TYPE_OBJECT,
0,
G_IMPLEMENT_INTERFACE (
E_TYPE_MAIL_EXTENSION,
e_mail_parser_mail_extension_interface_init)
G_IMPLEMENT_INTERFACE (
E_TYPE_MAIL_PARSER_EXTENSION,
e_mail_parser_parser_extension_interface_init));
static const gchar* parser_mime_types[] = { "multipart/signed",
"application/pgp-signature",
NULL };
static GSList *
empe_mp_signed_parse (EMailParserExtension *extension,
EMailParser *parser,
CamelMimePart *part,
GString *part_id,
GCancellable *cancellable)
{
CamelMimePart *cpart;
CamelMultipartSigned *mps;
CamelCipherContext *cipher = NULL;
CamelSession *session;
guint32 validity_type;
GSList *parts;
CamelCipherValidity *valid;
GError *local_error = NULL;
gint i, nparts, len;
gboolean secured;
if (g_cancellable_is_cancelled (cancellable))
return NULL;
/* 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 g_slist_alloc ();
}
}
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) {
parts = e_mail_parser_error (
parser, cancellable,
_("Could not parse MIME message. "
"Displaying as source."));
parts = g_slist_concat (parts,
e_mail_parser_parse_part_as (
parser, part, part_id,
"application/vnd.evolution.source",
cancellable));
return parts;
}
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) {
parts = e_mail_parser_error (
parser, cancellable,
_("Unsupported signature format"));
parts = g_slist_concat (parts,
e_mail_parser_parse_part_as (
parser, part, part_id,
"multipart/mixed", cancellable));
return parts;
}
valid = camel_cipher_context_verify_sync (
cipher, part, cancellable, &local_error);
if (valid == NULL) {
parts = e_mail_parser_error (
parser, cancellable,
_("Error verifying signature: %s"),
local_error->message ?
local_error->message :
_("Unknown error"));
g_clear_error (&local_error);
parts = g_slist_concat (parts,
e_mail_parser_parse_part_as (
parser, part, part_id,
"multipart/mixed", cancellable));
g_object_unref (cipher);
return parts;
}
nparts = camel_multipart_get_number (CAMEL_MULTIPART (mps));
secured = FALSE;
len = part_id->len;
parts = NULL;
for (i = 0; i < nparts; i++) {
CamelMimePart *subpart;
GSList *mail_parts, *iter;
subpart = camel_multipart_get_part (CAMEL_MULTIPART (mps), i);
g_string_append_printf(part_id, ".signed.%d", i);
mail_parts = e_mail_parser_parse_part (
parser, subpart, part_id, cancellable);
g_string_truncate (part_id, len);
if (!secured)
secured = e_mail_part_is_secured (subpart);
for (iter = mail_parts; iter; iter = iter->next) {
EMailPart *mail_part;
mail_part = iter->data;
if (!mail_part)
continue;
e_mail_part_update_validity (mail_part, valid,
validity_type | E_MAIL_PART_VALIDITY_SIGNED);
}
parts = g_slist_concat (parts, 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) {
GSList *button;
EMailPart *mail_part;
g_string_append (part_id, ".signed.button");
button = e_mail_parser_parse_part_as (
parser, part, part_id,
"application/vnd.evolution.widget.secure-button",
cancellable);
if (button && button->data) {
mail_part = button->data;
e_mail_part_update_validity (mail_part, valid,
validity_type | E_MAIL_PART_VALIDITY_SIGNED);
}
parts = g_slist_concat (parts, button);
g_string_truncate (part_id, len);
}
camel_cipher_validity_free (valid);
g_object_unref (cipher);
return parts;
}
static const gchar **
empe_mp_signed_mime_types (EMailExtension *extension)
{
return parser_mime_types;
}
static void
e_mail_parser_multipart_signed_class_init (EMailParserMultipartSignedClass *klass)
{
e_mail_parser_multipart_signed_parent_class = g_type_class_peek_parent (klass);
}
static void
e_mail_parser_parser_extension_interface_init (EMailParserExtensionInterface *iface)
{
iface->parse = empe_mp_signed_parse;
}
static void
e_mail_parser_mail_extension_interface_init (EMailExtensionInterface *iface)
{
iface->mime_types = empe_mp_signed_mime_types;
}
static void
e_mail_parser_multipart_signed_init (EMailParserMultipartSigned *parser)
{
}
