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-rw-r--r--em-format/e-mail-parser-multipart-encrypted.c220
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diff --git a/em-format/e-mail-parser-multipart-encrypted.c b/em-format/e-mail-parser-multipart-encrypted.c
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+++ b/em-format/e-mail-parser-multipart-encrypted.c
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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; 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 _EMailParserMultipartEncrypted {
+ GObject parent;
+} EMailParserMultipartEncrypted;
+
+typedef struct _EMailParserMultipartEncryptedClass {
+ GObjectClass parent_class;
+} EMailParserMultipartEncryptedClass;
+
+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 (
+ EMailParserMultipartEncrypted,
+ e_mail_parser_multipart_encrypted,
+ 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/encrypted", NULL };
+
+static GSList *
+empe_mp_encrypted_parse (EMailParserExtension *extension,
+ EMailParser *parser,
+ CamelMimePart *part,
+ GString *part_id,
+ GCancellable *cancellable)
+{
+ CamelCipherContext *context;
+ const gchar *protocol;
+ CamelMimePart *opart;
+ CamelCipherValidity *valid;
+ CamelMultipartEncrypted *mpe;
+ GError *local_error = NULL;
+ GSList *parts;
+ gint len;
+ GSList *iter;
+
+ if (g_cancellable_is_cancelled (cancellable))
+ return NULL;
+
+ mpe = (CamelMultipartEncrypted *) camel_medium_get_content ((CamelMedium *) part);
+ if (!CAMEL_IS_MULTIPART_ENCRYPTED (mpe)) {
+ 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;
+ }
+
+ /* 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) {
+ parts = e_mail_parser_error (
+ parser, cancellable,
+ _("Unsupported encryption type for multipart/encrypted"));
+
+ parts = g_slist_concat (
+ parts,
+ e_mail_parser_parse_part_as (
+ parser, part, part_id,
+ "multipart/mixed", cancellable));
+ return parts;
+ }
+
+ 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 (valid == NULL) {
+ parts = e_mail_parser_error (
+ parser, cancellable,
+ _("Could not parse PGP/MIME message: %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 (opart);
+ g_object_unref (context);
+
+ return parts;
+ }
+
+ len = part_id->len;
+ g_string_append (part_id, ".encrypted");
+
+ parts = e_mail_parser_parse_part (
+ parser, opart, part_id, cancellable);
+
+ g_string_truncate (part_id, len);
+
+ /* Update validity of all encrypted sub-parts */
+ 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_ENCRYPTED |
+ E_MAIL_PART_VALIDITY_PGP);
+ }
+
+ /* 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)) {
+ GSList *button;
+ EMailPart *mail_part;
+ g_string_append (part_id, ".encrypted.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_ENCRYPTED |
+ E_MAIL_PART_VALIDITY_PGP);
+ }
+
+ parts = g_slist_concat (parts, button);
+
+ 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 parts;
+}
+
+static const gchar **
+empe_mp_encrypted_mime_types (EMailExtension *extension)
+{
+ return parser_mime_types;
+}
+
+static void
+e_mail_parser_multipart_encrypted_class_init (EMailParserMultipartEncryptedClass *klass)
+{
+ e_mail_parser_multipart_encrypted_parent_class = g_type_class_peek_parent (klass);
+}
+
+static void
+e_mail_parser_parser_extension_interface_init (EMailParserExtensionInterface *iface)
+{
+ iface->parse = empe_mp_encrypted_parse;
+}
+
+static void
+e_mail_parser_mail_extension_interface_init (EMailExtensionInterface *iface)
+{
+ iface->mime_types = empe_mp_encrypted_mime_types;
+}
+
+static void
+e_mail_parser_multipart_encrypted_init (EMailParserMultipartEncrypted *parser)
+{
+
+}