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/*
* 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.
*
* 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 <string.h>
#include <glib/gi18n-lib.h>
#include <e-util/e-util.h>
#include "e-mail-parser-extension.h"
#include "e-mail-part-utils.h"
typedef EMailParserExtension EMailParserInlinePGPSigned;
typedef EMailParserExtensionClass EMailParserInlinePGPSignedClass;
GType e_mail_parser_inline_pgp_signed_get_type (void);
G_DEFINE_TYPE (
EMailParserInlinePGPSigned,
e_mail_parser_inline_pgp_signed,
E_TYPE_MAIL_PARSER_EXTENSION)
static const gchar *parser_mime_types[] = {
"application/x-inlinepgp-signed",
NULL
};
static gboolean
empe_inlinepgp_signed_parse (EMailParserExtension *extension,
EMailParser *parser,
CamelMimePart *part,
GString *part_id,
GCancellable *cancellable,
GQueue *out_mail_parts)
{
CamelStream *filtered_stream;
CamelMimeFilterPgp *pgp_filter;
CamelContentType *content_type;
CamelCipherContext *cipher;
CamelCipherValidity *valid;
CamelDataWrapper *dw;
CamelMimePart *opart;
CamelStream *ostream;
GQueue work_queue = G_QUEUE_INIT;
GList *head, *link;
gchar *type;
gint len;
GError *local_error = NULL;
GByteArray *ba;
if (g_cancellable_is_cancelled (cancellable) ||
/* avoid recursion */
(part_id->str && part_id->len > 17 && g_str_has_suffix (part_id->str, ".inlinepgp_signed")))
return FALSE;
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 (local_error != NULL) {
e_mail_parser_error (
parser, out_mail_parts,
_("Error verifying signature: %s"),
local_error->message);
g_error_free (local_error);
e_mail_parser_parse_part_as (
parser, part, part_id,
"application/vnd.evolution.source",
cancellable, out_mail_parts);
g_object_unref (cipher);
return TRUE;
}
/* 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");
e_mail_parser_parse_part (
parser, opart, part_id, cancellable, &work_queue);
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,
E_MAIL_PART_VALIDITY_SIGNED |
E_MAIL_PART_VALIDITY_PGP);
}
e_queue_transfer (&work_queue, out_mail_parts);
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)) {
EMailPart *mail_part;
g_string_append (part_id, ".inlinepgp_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,
E_MAIL_PART_VALIDITY_SIGNED |
E_MAIL_PART_VALIDITY_PGP);
e_queue_transfer (&work_queue, out_mail_parts);
g_string_truncate (part_id, len);
}
/* Clean Up */
camel_cipher_validity_free (valid);
g_object_unref (opart);
g_object_unref (ostream);
g_object_unref (cipher);
return TRUE;
}
static void
e_mail_parser_inline_pgp_signed_class_init (EMailParserExtensionClass *class)
{
class->mime_types = parser_mime_types;
class->priority = G_PRIORITY_LOW;
class->parse = empe_inlinepgp_signed_parse;
}
static void
e_mail_parser_inline_pgp_signed_init (EMailParserExtension *extension)
{
}
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