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/*
* e-mail-parser-multipart-encrypted.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.
*
* 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 General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <glib/gi18n-lib.h>
#include <libedataserver/libedataserver.h>
#include "e-mail-parser-extension.h"
#include "e-mail-part-utils.h"
typedef EMailParserExtension EMailParserMultipartEncrypted;
typedef EMailParserExtensionClass EMailParserMultipartEncryptedClass;
GType e_mail_parser_multipart_encrypted_get_type (void);
G_DEFINE_TYPE (
EMailParserMultipartEncrypted,
e_mail_parser_multipart_encrypted,
E_TYPE_MAIL_PARSER_EXTENSION)
static const gchar *parser_mime_types[] = {
"multipart/encrypted",
NULL
};
static gboolean
empe_mp_encrypted_parse (EMailParserExtension *extension,
EMailParser *parser,
CamelMimePart *part,
GString *part_id,
GCancellable *cancellable,
GQueue *out_mail_parts)
{
CamelCipherContext *context;
const gchar *protocol;
CamelMimePart *opart;
CamelCipherValidity *valid;
CamelMultipartEncrypted *mpe;
GQueue work_queue = G_QUEUE_INIT;
GList *head, *link;
GError *local_error = NULL;
gint len;
mpe = (CamelMultipartEncrypted *) camel_medium_get_content ((CamelMedium *) part);
if (!CAMEL_IS_MULTIPART_ENCRYPTED (mpe)) {
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;
}
/* Currently we only handle RFC2015-style PGP encryption. */
protocol = camel_content_type_param (
((CamelDataWrapper *) mpe)->mime_type, "protocol");
if (!protocol || g_ascii_strcasecmp (protocol, "application/pgp-encrypted") != 0) {
e_mail_parser_error (
parser, out_mail_parts,
_("Unsupported encryption type for multipart/encrypted"));
e_mail_parser_parse_part_as (
parser, part, part_id, "multipart/mixed",
cancellable, out_mail_parts);
return TRUE;
}
context = camel_gpg_context_new (e_mail_parser_get_session (parser));
opart = camel_mime_part_new ();
valid = camel_cipher_context_decrypt_sync (
context, part, opart, cancellable, &local_error);
e_mail_part_preserve_charset_in_content_type (part, opart);
if (local_error != NULL) {
e_mail_parser_error (
parser, out_mail_parts,
_("Could not parse PGP/MIME message: %s"),
local_error->message);
e_mail_parser_parse_part_as (
parser, part, part_id, "multipart/mixed",
cancellable, out_mail_parts);
g_object_unref (opart);
g_object_unref (context);
g_error_free (local_error);
return TRUE;
}
len = part_id->len;
g_string_append (part_id, ".encrypted");
e_mail_parser_parse_part (
parser, opart, part_id, cancellable, &work_queue);
g_string_truncate (part_id, len);
head = g_queue_peek_head_link (&work_queue);
/* Update validity of all encrypted sub-parts */
for (link = head; link != NULL; link = g_list_next (link)) {
EMailPart *mail_part = link->data;
e_mail_part_update_validity (
mail_part, valid,
E_MAIL_PART_VALIDITY_ENCRYPTED |
E_MAIL_PART_VALIDITY_PGP);
}
e_queue_transfer (&work_queue, out_mail_parts);
/* Add a widget with details about the encryption, but only when
* the decrypted part isn't itself secured, in that case it has
* created the button itself. */
if (!e_mail_part_is_secured (opart)) {
EMailPart *mail_part;
g_string_append (part_id, ".encrypted.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,
E_MAIL_PART_VALIDITY_ENCRYPTED |
E_MAIL_PART_VALIDITY_PGP);
e_queue_transfer (&work_queue, out_mail_parts);
g_string_truncate (part_id, len);
}
camel_cipher_validity_free (valid);
/* TODO: Make sure when we finalize this part, it is zero'd out */
g_object_unref (opart);
g_object_unref (context);
return TRUE;
}
static void
e_mail_parser_multipart_encrypted_class_init (EMailParserExtensionClass *class)
{
class->mime_types = parser_mime_types;
class->priority = G_PRIORITY_LOW;
class->parse = empe_mp_encrypted_parse;
}
static void
e_mail_parser_multipart_encrypted_init (EMailParserExtension *extension)
{
}
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