/*
* e-mail-parser-inlinepgp-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 <e-util/e-util.h>
#include <glib/gi18n-lib.h>
#include <camel/camel.h>
#include <string.h>
typedef struct _EMailParserInlinePGPSigned {
GObject parent;
} EMailParserInlinePGPSigned;
typedef struct _EMailParserInlinePGPSignedClass {
GObjectClass parent_class;
} EMailParserInlinePGPSignedClass;
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 (
EMailParserInlinePGPSigned,
e_mail_parser_inline_pgp_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[] = { "application/x-inlinepgp-signed",
NULL };
static GSList *
empe_inlinepgp_signed_parse (EMailParserExtension *extension,
EMailParser *parser,
CamelMimePart *part,
GString *part_id,
GCancellable *cancellable)
{
CamelStream *filtered_stream;
CamelMimeFilterPgp *pgp_filter;
CamelContentType *content_type;
CamelCipherContext *cipher;
CamelCipherValidity *valid;
CamelDataWrapper *dw;
CamelMimePart *opart;
CamelStream *ostream;
gchar *type;
gint len;
GError *local_error = NULL;
GByteArray *ba;
GSList *parts, *iter;
if (g_cancellable_is_cancelled (cancellable))
return NULL;
cipher = camel_gpg_context_new (e_mail_parser_get_session (parser));
/* Verify the signature of the message */
valid = camel_cipher_context_verify_sync (
cipher, part, cancellable, &local_error);
if (!valid) {
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,
"application/vnd.evolution.source",
cancellable));
g_object_unref (cipher);
return parts;
}
/* Setup output stream */
ostream = camel_stream_mem_new ();
filtered_stream = camel_stream_filter_new (ostream);
/* Add PGP header / footer filter */
pgp_filter = (CamelMimeFilterPgp *) camel_mime_filter_pgp_new ();
camel_stream_filter_add (
CAMEL_STREAM_FILTER (filtered_stream),
CAMEL_MIME_FILTER (pgp_filter));
g_object_unref (pgp_filter);
/* Pass through the filters that have been setup */
dw = camel_medium_get_content ((CamelMedium *) part);
camel_data_wrapper_decode_to_stream_sync (
dw, (CamelStream *) filtered_stream, cancellable, NULL);
camel_stream_flush ((CamelStream *) filtered_stream, cancellable, NULL);
g_object_unref (filtered_stream);
/* Create a new text/plain MIME part containing the signed
* content preserving the original part's Content-Type params. */
content_type = camel_mime_part_get_content_type (part);
type = camel_content_type_format (content_type);
content_type = camel_content_type_decode (type);
g_free (type);
g_free (content_type->type);
content_type->type = g_strdup ("text");
g_free (content_type->subtype);
content_type->subtype = g_strdup ("plain");
type = camel_content_type_format (content_type);
camel_content_type_unref (content_type);
ba = camel_stream_mem_get_byte_array ((CamelStreamMem *) ostream);
opart = camel_mime_part_new ();
camel_mime_part_set_content (opart, (gchar *) ba->data, ba->len, type);
g_free (type);
len = part_id->len;
g_string_append (part_id, ".inlinepgp_signed");
parts = e_mail_parser_parse_part (
parser, opart, part_id, cancellable);
for (iter = parts; iter; iter = iter->next) {
EMailPart *mail_part;
mail_part = iter->data;
if (!mail_part)
continue;
e_mail_part_update_validity (mail_part, valid,
E_MAIL_PART_VALIDITY_SIGNED |
E_MAIL_PART_VALIDITY_PGP);
}
g_string_truncate (part_id, len);
/* 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 (!e_mail_part_is_secured (opart)) {
GSList *button;
EMailPart *mail_part;
g_string_append (part_id, ".inlinepgp_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,
E_MAIL_PART_VALIDITY_SIGNED |
E_MAIL_PART_VALIDITY_PGP);
}
parts = g_slist_concat (parts, button);
g_string_truncate (part_id, len);
}
/* Clean Up */
camel_cipher_validity_free (valid);
g_object_unref (dw);
g_object_unref (opart);
g_object_unref (ostream);
g_object_unref (cipher);
return parts;
}
static const gchar **
empe_inlinepgp_signed_mime_types (EMailExtension *extension)
{
return parser_mime_types;
}
static void
e_mail_parser_inline_pgp_signed_class_init (EMailParserInlinePGPSignedClass *klass)
{
e_mail_parser_inline_pgp_signed_parent_class = g_type_class_peek_parent (klass);
}
static void
e_mail_parser_parser_extension_interface_init (EMailParserExtensionInterface *iface)
{
iface->parse = empe_inlinepgp_signed_parse;
}
static void
e_mail_parser_mail_extension_interface_init (EMailExtensionInterface *iface)
{
iface->mime_types = empe_inlinepgp_signed_mime_types;
}
static void
e_mail_parser_inline_pgp_signed_init (EMailParserInlinePGPSigned *parser)
{
}
