fwupd/libfwupdplugin/fu-cabinet.c

/*
 * Copyright (C) 2017 Richard Hughes <richard@hughsie.com>
 *
 * SPDX-License-Identifier: LGPL-2.1+
 */

#define G_LOG_DOMAIN "FuCabinet"

#include "config.h"

#include <gio/gio.h>
#include <libgcab.h>

#include "fwupd-common.h"
#include "fwupd-enums.h"
#include "fwupd-error.h"

#include "fu-cabinet.h"
#include "fu-common.h"

/**
 * FuCabinet:
 *
 * Cabinet archive parser and writer.
 *
 * See also: [class@FuArchive]
 */

struct _FuCabinet {
	GObject parent_instance;
	guint64 size_max;
	GCabCabinet *gcab_cabinet;
	gchar *container_checksum;
	XbBuilder *builder;
	XbSilo *silo;
	JcatContext *jcat_context;
	JcatFile *jcat_file;
};

G_DEFINE_TYPE(FuCabinet, fu_cabinet, G_TYPE_OBJECT)

static void
fu_cabinet_finalize(GObject *obj)
{
	FuCabinet *self = FU_CABINET(obj);
	if (self->silo != NULL)
		g_object_unref(self->silo);
	if (self->builder != NULL)
		g_object_unref(self->builder);
	g_free(self->container_checksum);
	g_object_unref(self->gcab_cabinet);
	g_object_unref(self->jcat_context);
	g_object_unref(self->jcat_file);
	G_OBJECT_CLASS(fu_cabinet_parent_class)->finalize(obj);
}

static void
fu_cabinet_class_init(FuCabinetClass *klass)
{
	GObjectClass *object_class = G_OBJECT_CLASS(klass);
	object_class->finalize = fu_cabinet_finalize;
}

static void
fu_cabinet_init(FuCabinet *self)
{
	self->size_max = 1024 * 1024 * 100;
	self->gcab_cabinet = gcab_cabinet_new();
	self->builder = xb_builder_new();
	self->jcat_file = jcat_file_new();
	self->jcat_context = jcat_context_new();
}

/**
 * fu_cabinet_set_size_max:
 * @self: a #FuCabinet
 * @size_max: size in bytes
 *
 * Sets the maximum size of the decompressed cabinet file.
 *
 * Since: 1.4.0
 **/
void
fu_cabinet_set_size_max(FuCabinet *self, guint64 size_max)
{
	g_return_if_fail(FU_IS_CABINET(self));
	self->size_max = size_max;
}

/**
 * fu_cabinet_set_jcat_context: (skip):
 * @self: a #FuCabinet
 * @jcat_context: (nullable): a Jcat context
 *
 * Sets the Jcat context, which is used for setting the trust flags on the
 * each release in the archive.
 *
 * Since: 1.4.0
 **/
void
fu_cabinet_set_jcat_context(FuCabinet *self, JcatContext *jcat_context)
{
	g_return_if_fail(FU_IS_CABINET(self));
	g_return_if_fail(JCAT_IS_CONTEXT(jcat_context));
	g_set_object(&self->jcat_context, jcat_context);
}

/**
 * fu_cabinet_get_silo: (skip):
 * @self: a #FuCabinet
 *
 * Gets the silo that represents the superset metadata of all the metainfo files
 * found in the archive.
 *
 * Returns: (transfer full): a #XbSilo, or %NULL if the archive has not been parsed
 *
 * Since: 1.4.0
 **/
XbSilo *
fu_cabinet_get_silo(FuCabinet *self)
{
	g_return_val_if_fail(FU_IS_CABINET(self), NULL);
	if (self->silo == NULL)
		return NULL;
	return g_object_ref(self->silo);
}

static GCabFile *
fu_cabinet_get_file_by_name(FuCabinet *self, const gchar *basename)
{
	GPtrArray *folders = gcab_cabinet_get_folders(self->gcab_cabinet);
	for (guint i = 0; i < folders->len; i++) {
		GCabFolder *cabfolder = GCAB_FOLDER(g_ptr_array_index(folders, i));
		GCabFile *cabfile = gcab_folder_get_file_by_name(cabfolder, basename);
		if (cabfile != NULL)
			return cabfile;
	}
	return NULL;
}

/**
 * fu_cabinet_add_file:
 * @self: a #FuCabinet
 * @basename: filename
 * @data: file data
 *
 * Adds a file to the silo.
 *
 * Since: 1.6.0
 **/
void
fu_cabinet_add_file(FuCabinet *self, const gchar *basename, GBytes *data)
{
	GPtrArray *folders;
	GCabFile *gcab_file_old;
	g_autoptr(GCabFolder) gcab_folder = NULL;
	g_autoptr(GCabFile) gcab_file = NULL;

	g_return_if_fail(FU_IS_CABINET(self));
	g_return_if_fail(basename != NULL);
	g_return_if_fail(data != NULL);

	/* existing file? */
	gcab_file_old = fu_cabinet_get_file_by_name(self, basename);
	if (gcab_file_old != NULL) {
#ifdef HAVE_GCAB_FILE_SET_BYTES
		gcab_file_set_bytes(gcab_file_old, data);
#else
		g_object_set(gcab_file_old, "bytes", data, NULL);
#endif
		return;
	}

	/* new file, in a possibly new folder */
	folders = gcab_cabinet_get_folders(self->gcab_cabinet);
	if (folders->len == 0) {
		gcab_folder = gcab_folder_new(GCAB_COMPRESSION_NONE);
		gcab_cabinet_add_folder(self->gcab_cabinet, gcab_folder, NULL);
	} else {
		gcab_folder = g_object_ref(GCAB_FOLDER(g_ptr_array_index(folders, 0)));
	}
	gcab_file = gcab_file_new_with_bytes(basename, data);
	gcab_folder_add_file(gcab_folder, gcab_file, FALSE, NULL, NULL);
}

/**
 * fu_cabinet_get_file:
 * @self: a #FuCabinet
 * @basename: filename
 * @error: (nullable): optional return location for an error
 *
 * Gets a file from the archive.
 *
 * Returns: (transfer full): a #GBytes, or %NULL if the file does not exist
 *
 * Since: 1.6.0
 **/
GBytes *
fu_cabinet_get_file(FuCabinet *self, const gchar *basename, GError **error)
{
	GCabFile *cabfile;
	GBytes *blob;

	g_return_val_if_fail(FU_IS_CABINET(self), NULL);
	g_return_val_if_fail(basename != NULL, NULL);

	cabfile = fu_cabinet_get_file_by_name(self, basename);
	if (cabfile == NULL) {
		g_set_error(error,
			    FWUPD_ERROR,
			    FWUPD_ERROR_INVALID_FILE,
			    "cannot find %s in archive",
			    basename);
		return NULL;
	}
	blob = gcab_file_get_bytes(cabfile);
	if (blob == NULL) {
		g_set_error_literal(error,
				    FWUPD_ERROR,
				    FWUPD_ERROR_INVALID_FILE,
				    "no GBytes from GCabFile firmware");
		return NULL;
	}
	return g_bytes_ref(blob);
}

/* sets the firmware and signature blobs on XbNode */
static gboolean
fu_cabinet_parse_release(FuCabinet *self, XbNode *release, GError **error)
{
	GCabFile *cabfile;
	GBytes *blob;
	const gchar *csum_filename = NULL;
	g_autofree gchar *basename = NULL;
	g_autoptr(XbNode) artifact = NULL;
	g_autoptr(XbNode) csum_tmp = NULL;
	g_autoptr(XbNode) metadata_trust = NULL;
	g_autoptr(XbNode) nsize = NULL;
	g_autoptr(JcatItem) item = NULL;
	g_autoptr(GBytes) release_flags_blob = NULL;
	FwupdReleaseFlags release_flags = FWUPD_RELEASE_FLAG_NONE;

	/* we set this with XbBuilderSource before the silo was created */
	metadata_trust = xb_node_query_first(release, "../../info/metadata_trust", NULL);
	if (metadata_trust != NULL)
		release_flags |= FWUPD_RELEASE_FLAG_TRUSTED_METADATA;

	/* look for source artifact first */
	artifact = xb_node_query_first(release, "artifacts/artifact[@type='binary']", NULL);
	if (artifact != NULL) {
		csum_filename = xb_node_query_text(artifact, "filename", NULL);
		csum_tmp = xb_node_query_first(artifact, "checksum[@type='sha256']", NULL);
		if (csum_tmp == NULL)
			csum_tmp = xb_node_query_first(artifact, "checksum", NULL);
	} else {
		csum_tmp = xb_node_query_first(release, "checksum[@target='content']", NULL);
		if (csum_tmp != NULL)
			csum_filename = xb_node_get_attr(csum_tmp, "filename");
	}

	/* if this isn't true, a firmware needs to set in the metainfo.xml file
	 * something like: <checksum target="content" filename="FLASH.ROM"/> */
	if (csum_filename == NULL)
		csum_filename = "firmware.bin";

	/* get the main firmware file */
	basename = g_path_get_basename(csum_filename);
	cabfile = fu_cabinet_get_file_by_name(self, basename);
	if (cabfile == NULL) {
		g_set_error(error,
			    FWUPD_ERROR,
			    FWUPD_ERROR_INVALID_FILE,
			    "cannot find %s in archive",
			    basename);
		return FALSE;
	}
	blob = gcab_file_get_bytes(cabfile);
	if (blob == NULL) {
		g_set_error_literal(error,
				    FWUPD_ERROR,
				    FWUPD_ERROR_INVALID_FILE,
				    "no GBytes from GCabFile firmware");
		return FALSE;
	}

	/* set the blob */
	xb_node_set_data(release, "fwupd::FirmwareBlob", blob);

	/* set as metadata if unset, but error if specified and incorrect */
	nsize = xb_node_query_first(release, "size[@type='installed']", NULL);
	if (nsize != NULL) {
		guint64 size = fu_common_strtoull(xb_node_get_text(nsize));
		if (size != g_bytes_get_size(blob)) {
			g_set_error(error,
				    FWUPD_ERROR,
				    FWUPD_ERROR_INVALID_FILE,
				    "contents size invalid, expected "
				    "%" G_GSIZE_FORMAT ", got %" G_GUINT64_FORMAT,
				    g_bytes_get_size(blob),
				    size);
			return FALSE;
		}
	} else {
		guint64 size = g_bytes_get_size(blob);
		g_autoptr(GBytes) blob_sz = g_bytes_new(&size, sizeof(guint64));
		xb_node_set_data(release, "fwupd::ReleaseSize", blob_sz);
	}

	/* set if unspecified, but error out if specified and incorrect */
	if (csum_tmp != NULL && xb_node_get_text(csum_tmp) != NULL) {
		const gchar *checksum_old = xb_node_get_text(csum_tmp);
		GChecksumType checksum_type = fwupd_checksum_guess_kind(checksum_old);
		g_autofree gchar *checksum = NULL;
		checksum = g_compute_checksum_for_bytes(checksum_type, blob);
		if (g_strcmp0(checksum, checksum_old) != 0) {
			g_set_error(error,
				    FWUPD_ERROR,
				    FWUPD_ERROR_INVALID_FILE,
				    "contents checksum invalid, expected %s, got %s",
				    checksum,
				    xb_node_get_text(csum_tmp));
			return FALSE;
		}
	}

	/* find out if the payload is signed, falling back to detached */
	item = jcat_file_get_item_by_id(self->jcat_file, basename, NULL);
	if (item != NULL) {
		g_autoptr(GError) error_local = NULL;
		g_autoptr(GPtrArray) results = NULL;
		results = jcat_context_verify_item(self->jcat_context,
						   blob,
						   item,
						   JCAT_VERIFY_FLAG_REQUIRE_CHECKSUM |
						       JCAT_VERIFY_FLAG_REQUIRE_SIGNATURE,
						   &error_local);
		if (results == NULL) {
			g_debug("failed to verify payload %s: %s", basename, error_local->message);
		} else {
			g_debug("verified payload %s: %u", basename, results->len);
			release_flags |= FWUPD_RELEASE_FLAG_TRUSTED_PAYLOAD;
		}

		/* legacy GPG detached signature */
	} else {
		g_autofree gchar *basename_sig = NULL;
		basename_sig = g_strdup_printf("%s.asc", basename);
		cabfile = fu_cabinet_get_file_by_name(self, basename_sig);
		if (cabfile != NULL) {
			GBytes *data_sig;
			g_autoptr(JcatResult) jcat_result = NULL;
			g_autoptr(JcatBlob) jcat_blob = NULL;
			g_autoptr(GError) error_local = NULL;

			data_sig = gcab_file_get_bytes(cabfile);
			if (data_sig == NULL) {
				g_set_error(error,
					    FWUPD_ERROR,
					    FWUPD_ERROR_INVALID_FILE,
					    "no GBytes from GCabFile %s",
					    basename_sig);
				return FALSE;
			}
			jcat_blob = jcat_blob_new(JCAT_BLOB_KIND_GPG, data_sig);
			jcat_result = jcat_context_verify_blob(self->jcat_context,
							       blob,
							       jcat_blob,
							       JCAT_VERIFY_FLAG_REQUIRE_SIGNATURE,
							       &error_local);
			if (jcat_result == NULL) {
				g_debug("failed to verify payload %s using detached: %s",
					basename,
					error_local->message);
			} else {
				g_debug("verified payload %s using detached", basename);
				release_flags |= FWUPD_RELEASE_FLAG_TRUSTED_PAYLOAD;
			}
		}
	}

	/* this means we can get the data from fu_keyring_get_release_flags */
	release_flags_blob = g_bytes_new(&release_flags, sizeof(release_flags));
	xb_node_set_data(release, "fwupd::ReleaseFlags", release_flags_blob);

	/* success */
	return TRUE;
}

static gint
fu_cabinet_sort_cb(XbBuilderNode *bn1, XbBuilderNode *bn2, gpointer user_data)
{
	guint64 prio1 = xb_builder_node_get_attr_as_uint(bn1, "priority");
	guint64 prio2 = xb_builder_node_get_attr_as_uint(bn2, "priority");
	if (prio1 > prio2)
		return -1;
	if (prio1 < prio2)
		return 1;
	return 0;
}

static gboolean
fu_cabinet_sort_priority_cb(XbBuilderFixup *self,
			    XbBuilderNode *bn,
			    gpointer user_data,
			    GError **error)
{
	xb_builder_node_sort_children(bn, fu_cabinet_sort_cb, user_data);
	return TRUE;
}

static XbBuilderNode *
_xb_builder_node_get_child_by_element_attr(XbBuilderNode *bn,
					   const gchar *element,
					   const gchar *attr_name,
					   const gchar *attr_value)
{
	GPtrArray *bcs = xb_builder_node_get_children(bn);
	for (guint i = 0; i < bcs->len; i++) {
		XbBuilderNode *bc = g_ptr_array_index(bcs, i);
		if (g_strcmp0(xb_builder_node_get_element(bc), element) != 0)
			continue;
		if (g_strcmp0(xb_builder_node_get_attr(bc, attr_name), attr_value) == 0)
			return g_object_ref(bc);
	}
	return NULL;
}

static gboolean
fu_cabinet_set_container_checksum_cb(XbBuilderFixup *builder_fixup,
				     XbBuilderNode *bn,
				     gpointer user_data,
				     GError **error)
{
	FuCabinet *self = FU_CABINET(user_data);
	g_autoptr(XbBuilderNode) csum = NULL;

	/* not us */
	if (g_strcmp0(xb_builder_node_get_element(bn), "release") != 0)
		return TRUE;

	/* verify it exists */
	csum = _xb_builder_node_get_child_by_element_attr(bn, "checksum", "type", "container");
	if (csum == NULL) {
		csum = xb_builder_node_insert(bn, "checksum", "target", "container", NULL);
	}

	/* verify it is correct */
	if (g_strcmp0(xb_builder_node_get_text(csum), self->container_checksum) != 0) {
		if (xb_builder_node_get_text(csum) != NULL) {
			g_warning("invalid container checksum %s, fixing up to %s",
				  xb_builder_node_get_text(csum),
				  self->container_checksum);
		}
		xb_builder_node_set_text(csum, self->container_checksum, -1);
	}
	return TRUE;
}

static void
fu_cabinet_fixup_checksum_children(XbBuilderNode *bn,
				   const gchar *element,
				   const gchar *attr_name,
				   const gchar *attr_value)
{
	GPtrArray *bcs = xb_builder_node_get_children(bn);
	for (guint i = 0; i < bcs->len; i++) {
		XbBuilderNode *bc = g_ptr_array_index(bcs, i);
		if (g_strcmp0(xb_builder_node_get_element(bc), element) != 0)
			continue;
		if (attr_value == NULL ||
		    g_strcmp0(xb_builder_node_get_attr(bc, attr_name), attr_value) == 0) {
			const gchar *tmp = xb_builder_node_get_text(bc);
			if (tmp != NULL) {
				g_autofree gchar *lowercase = g_ascii_strdown(tmp, -1);
				xb_builder_node_set_text(bc, lowercase, -1);
			}
		}
	}
}

static gboolean
fu_cabinet_set_lowercase_checksum_cb(XbBuilderFixup *builder_fixup,
				     XbBuilderNode *bn,
				     gpointer user_data,
				     GError **error)
{
	if (g_strcmp0(xb_builder_node_get_element(bn), "artifact") == 0)
		/* don't care whether it's sha256, sha1 or something else so don't check for
		 * specific value */
		fu_cabinet_fixup_checksum_children(bn, "checksum", "type", NULL);
	else if (g_strcmp0(xb_builder_node_get_element(bn), "release") == 0)
		fu_cabinet_fixup_checksum_children(bn, "checksum", "target", "content");

	return TRUE;
}

static gboolean
fu_cabinet_fixup_strip_inner_text_cb(XbBuilderFixup *self,
				     XbBuilderNode *bn,
				     gpointer user_data,
				     GError **error)
{
#if LIBXMLB_CHECK_VERSION(0, 3, 4)
	if (xb_builder_node_get_first_child(bn) == NULL)
		xb_builder_node_add_flag(bn, XB_BUILDER_NODE_FLAG_STRIP_TEXT);
#endif
	return TRUE;
}

/* adds each GCabFile to the silo */
static gboolean
fu_cabinet_build_silo_file(FuCabinet *self,
			   GCabFile *cabfile,
			   FwupdReleaseFlags release_flags,
			   GError **error)
{
	GBytes *blob;
	g_autoptr(GError) error_local = NULL;
	g_autoptr(XbBuilderSource) source = xb_builder_source_new();
	g_autoptr(XbBuilderNode) bn_info = xb_builder_node_new("info");

	/* indicate the metainfo file was signed */
	if (release_flags & FWUPD_RELEASE_FLAG_TRUSTED_METADATA)
		xb_builder_node_insert(bn_info, "metadata_trust", NULL);
	xb_builder_node_insert_text(bn_info, "filename", gcab_file_get_name(cabfile), NULL);
	xb_builder_source_set_info(source, bn_info);

	/* rewrite to be under a components root */
	xb_builder_source_set_prefix(source, "components");

	/* parse file */
	blob = gcab_file_get_bytes(cabfile);
	if (blob == NULL) {
		g_set_error_literal(error,
				    FWUPD_ERROR,
				    FWUPD_ERROR_INVALID_FILE,
				    "no GBytes from GCabFile");
		return FALSE;
	}
	if (!xb_builder_source_load_bytes(source,
					  blob,
					  XB_BUILDER_SOURCE_FLAG_NONE,
					  &error_local)) {
		g_set_error(error,
			    FWUPD_ERROR,
			    FWUPD_ERROR_INVALID_FILE,
			    "could not parse MetaInfo XML: %s",
			    error_local->message);
		return FALSE;
	}
	xb_builder_import_source(self->builder, source);

	/* success */
	return TRUE;
}

static gboolean
fu_cabinet_build_silo_metainfo(FuCabinet *self, GCabFile *cabfile, GError **error)
{
	FwupdReleaseFlags release_flags = FWUPD_RELEASE_FLAG_NONE;
	const gchar *fn = gcab_file_get_extract_name(cabfile);
	g_autoptr(JcatItem) item = NULL;

	/* validate against the Jcat file */
	item = jcat_file_get_item_by_id(self->jcat_file, fn, NULL);
	if (item == NULL) {
		g_debug("failed to verify %s: no JcatItem", fn);
	} else {
		g_autoptr(GError) error_local = NULL;
		g_autoptr(GPtrArray) results = NULL;
		results = jcat_context_verify_item(self->jcat_context,
						   gcab_file_get_bytes(cabfile),
						   item,
						   JCAT_VERIFY_FLAG_REQUIRE_CHECKSUM |
						       JCAT_VERIFY_FLAG_REQUIRE_SIGNATURE,
						   &error_local);
		if (results == NULL) {
			g_debug("failed to verify %s: %s", fn, error_local->message);
		} else {
			g_debug("verified metadata %s: %u", fn, results->len);
			release_flags |= FWUPD_RELEASE_FLAG_TRUSTED_METADATA;
		}
	}

	/* actually parse the XML now */
	g_debug("processing file: %s", fn);
	if (!fu_cabinet_build_silo_file(self, cabfile, release_flags, error)) {
		g_prefix_error(error,
			       "%s could not be loaded: ",
			       gcab_file_get_extract_name(cabfile));
		return FALSE;
	}

	/* success */
	return TRUE;
}

/* load the firmware.jcat files if included */
static gboolean
fu_cabinet_build_jcat_folder(FuCabinet *self, GCabFolder *cabfolder, GError **error)
{
	g_autoptr(GSList) cabfiles = gcab_folder_get_files(cabfolder);
	for (GSList *l = cabfiles; l != NULL; l = l->next) {
		GCabFile *cabfile = GCAB_FILE(l->data);
		const gchar *fn = gcab_file_get_extract_name(cabfile);
		if (g_str_has_suffix(fn, ".jcat")) {
			GBytes *data_jcat = gcab_file_get_bytes(cabfile);
			g_autoptr(GInputStream) istream = NULL;
			istream = g_memory_input_stream_new_from_bytes(data_jcat);
			if (!jcat_file_import_stream(self->jcat_file,
						     istream,
						     JCAT_IMPORT_FLAG_NONE,
						     NULL,
						     error))
				return FALSE;
		}
	}
	return TRUE;
}

/* adds each GCabFolder to the silo */
static gboolean
fu_cabinet_build_silo_folder(FuCabinet *self, GCabFolder *cabfolder, GError **error)
{
	g_autoptr(GSList) cabfiles = gcab_folder_get_files(cabfolder);
	for (GSList *l = cabfiles; l != NULL; l = l->next) {
		GCabFile *cabfile = GCAB_FILE(l->data);
		const gchar *fn = gcab_file_get_extract_name(cabfile);
		if (!g_str_has_suffix(fn, ".metainfo.xml"))
			continue;
		if (!fu_cabinet_build_silo_metainfo(self, cabfile, error))
			return FALSE;
	}
	return TRUE;
}

static gboolean
fu_cabinet_build_silo(FuCabinet *self, GBytes *data, GError **error)
{
	GPtrArray *folders;
	g_autoptr(XbBuilderFixup) fixup1 = NULL;
	g_autoptr(XbBuilderFixup) fixup2 = NULL;
	g_autoptr(XbBuilderFixup) fixup3 = NULL;
	g_autoptr(XbBuilderFixup) fixup4 = NULL;

	/* verbose profiling */
	if (g_getenv("FWUPD_XMLB_VERBOSE") != NULL) {
		xb_builder_set_profile_flags(self->builder,
					     XB_SILO_PROFILE_FLAG_XPATH |
						 XB_SILO_PROFILE_FLAG_DEBUG);
	}

	/* load Jcat */
	folders = gcab_cabinet_get_folders(self->gcab_cabinet);
	if (self->jcat_context != NULL) {
		for (guint i = 0; i < folders->len; i++) {
			GCabFolder *cabfolder = GCAB_FOLDER(g_ptr_array_index(folders, i));
			if (!fu_cabinet_build_jcat_folder(self, cabfolder, error))
				return FALSE;
		}
	}

	/* adds each metainfo file to the silo */
	for (guint i = 0; i < folders->len; i++) {
		GCabFolder *cabfolder = GCAB_FOLDER(g_ptr_array_index(folders, i));
		if (!fu_cabinet_build_silo_folder(self, cabfolder, error))
			return FALSE;
	}

	/* sort the components by priority */
	fixup1 = xb_builder_fixup_new("OrderByPriority", fu_cabinet_sort_priority_cb, NULL, NULL);
	xb_builder_fixup_set_max_depth(fixup1, 0);
	xb_builder_add_fixup(self->builder, fixup1);

	/* ensure the container checksum is always set */
	fixup2 = xb_builder_fixup_new("SetContainerChecksum",
				      fu_cabinet_set_container_checksum_cb,
				      self,
				      NULL);
	xb_builder_add_fixup(self->builder, fixup2);

	fixup3 = xb_builder_fixup_new("LowerCaseCheckSum",
				      fu_cabinet_set_lowercase_checksum_cb,
				      self,
				      NULL);
	xb_builder_add_fixup(self->builder, fixup3);

	/* strip inner nodes without children */
	fixup4 = xb_builder_fixup_new("TextStripInner",
				      fu_cabinet_fixup_strip_inner_text_cb,
				      self,
				      NULL);
	xb_builder_add_fixup(self->builder, fixup4);

	/* did we get any valid files */
	self->silo = xb_builder_compile(self->builder, XB_BUILDER_COMPILE_FLAG_NONE, NULL, error);
	if (self->silo == NULL)
		return FALSE;

	/* success */
	return TRUE;
}

typedef struct {
	FuCabinet *self;
	guint64 size_total;
	GError *error;
} FuCabinetDecompressHelper;

static gboolean
fu_cabinet_decompress_file_cb(GCabFile *file, gpointer user_data)
{
	FuCabinetDecompressHelper *helper = (FuCabinetDecompressHelper *)user_data;
	FuCabinet *self = FU_CABINET(helper->self);
	g_autofree gchar *basename = NULL;
	g_autofree gchar *name = NULL;

	/* already failed */
	if (helper->error != NULL)
		return FALSE;

	/* check the size of the compressed file */
	if (gcab_file_get_size(file) > self->size_max) {
		g_autofree gchar *sz_val = g_format_size(gcab_file_get_size(file));
		g_autofree gchar *sz_max = g_format_size(self->size_max);
		g_set_error(&helper->error,
			    FWUPD_ERROR,
			    FWUPD_ERROR_INVALID_FILE,
			    "file %s was too large (%s, limit %s)",
			    gcab_file_get_name(file),
			    sz_val,
			    sz_max);
		return FALSE;
	}

	/* check the total size of all the compressed files */
	helper->size_total += gcab_file_get_size(file);
	if (helper->size_total > self->size_max) {
		g_autofree gchar *sz_val = g_format_size(helper->size_total);
		g_autofree gchar *sz_max = g_format_size(self->size_max);
		g_set_error(&helper->error,
			    FWUPD_ERROR,
			    FWUPD_ERROR_INVALID_FILE,
			    "uncompressed data too large (%s, limit %s)",
			    sz_val,
			    sz_max);
		return FALSE;
	}

	/* convert to UNIX paths */
	name = g_strdup(gcab_file_get_name(file));
	g_strdelimit(name, "\\", '/');

	/* ignore the dirname completely */
	basename = g_path_get_basename(name);
	gcab_file_set_extract_name(file, basename);
	return TRUE;
}

static gboolean
fu_cabinet_decompress(FuCabinet *self, GBytes *data, GError **error)
{
	FuCabinetDecompressHelper helper = {
	    .self = self,
	    .size_total = 0,
	    .error = NULL,
	};
	g_autoptr(GError) error_local = NULL;
	g_autoptr(GInputStream) istream = NULL;

	/* load from a seekable stream */
	istream = g_memory_input_stream_new_from_bytes(data);
	if (!gcab_cabinet_load(self->gcab_cabinet, istream, NULL, error))
		return FALSE;

	/* check the size is sane */
	if (gcab_cabinet_get_size(self->gcab_cabinet) > self->size_max) {
		g_autofree gchar *sz_val = g_format_size(gcab_cabinet_get_size(self->gcab_cabinet));
		g_autofree gchar *sz_max = g_format_size(self->size_max);
		g_set_error(error,
			    FWUPD_ERROR,
			    FWUPD_ERROR_INVALID_FILE,
			    "archive too large (%s, limit %s)",
			    sz_val,
			    sz_max);
		return FALSE;
	}

	/* decompress the file to memory */
	if (!gcab_cabinet_extract_simple(self->gcab_cabinet,
					 NULL,
					 fu_cabinet_decompress_file_cb,
					 &helper,
					 NULL,
					 &error_local)) {
		g_set_error_literal(error,
				    FWUPD_ERROR,
				    FWUPD_ERROR_INVALID_FILE,
				    error_local->message);
		return FALSE;
	}

	/* the file callback set an error */
	if (helper.error != NULL) {
		g_propagate_error(error, helper.error);
		return FALSE;
	}

	/* success */
	return TRUE;
}

/**
 * fu_cabinet_export:
 * @self: a #FuCabinet
 * @flags: export flags, e.g. %FU_CABINET_EXPORT_FLAG_NONE
 * @error: (nullable): optional return location for an error
 *
 * Exports the cabinet archive.
 *
 * Returns: (transfer full): a data blob
 *
 * Since: 1.6.0
 **/
GBytes *
fu_cabinet_export(FuCabinet *self, FuCabinetExportFlags flags, GError **error)
{
	g_autoptr(GOutputStream) op = NULL;
	op = g_memory_output_stream_new_resizable();
	if (!gcab_cabinet_write_simple(self->gcab_cabinet,
				       op,
				       NULL,
				       NULL, /* progress */
				       NULL,
				       error))
		return NULL;
	if (!g_output_stream_close(op, NULL, error))
		return NULL;
	return g_memory_output_stream_steal_as_bytes(G_MEMORY_OUTPUT_STREAM(op));
}

static gboolean
fu_cabinet_sign_filename(FuCabinet *self,
			 const gchar *filename,
			 JcatEngine *jcat_engine,
			 JcatFile *jcat_file,
			 GBytes *cert,
			 GBytes *privkey,
			 GError **error)
{
	g_autoptr(GBytes) source_blob = NULL;
	g_autoptr(JcatBlob) jcat_blob = NULL;
	g_autoptr(JcatItem) jcat_item = NULL;

	/* sign the file using the engine */
	source_blob = fu_cabinet_get_file(self, filename, error);
	if (source_blob == NULL)
		return FALSE;
	jcat_item = jcat_file_get_item_by_id(jcat_file, filename, NULL);
	if (jcat_item == NULL) {
		jcat_item = jcat_item_new(filename);
		jcat_file_add_item(jcat_file, jcat_item);
	}
	jcat_blob = jcat_engine_pubkey_sign(jcat_engine,
					    source_blob,
					    cert,
					    privkey,
					    JCAT_SIGN_FLAG_ADD_TIMESTAMP | JCAT_SIGN_FLAG_ADD_CERT,
					    error);
	if (jcat_blob == NULL)
		return FALSE;
	jcat_item_add_blob(jcat_item, jcat_blob);
	return TRUE;
}

static gboolean
fu_cabinet_sign_enumerate_metainfo(FuCabinet *self, GPtrArray *files, GError **error)
{
	g_autoptr(GError) error_local = NULL;
	g_autoptr(GPtrArray) nodes = NULL;
	g_autoptr(XbSilo) silo = fu_cabinet_get_silo(self);

	/* get all the firmware referenced by the metainfo files */
	nodes = xb_silo_query(silo,
			      "components/component[@type='firmware']/info/filename",
			      0,
			      &error_local);
	if (nodes == NULL) {
		if (g_error_matches(error_local, G_IO_ERROR, G_IO_ERROR_INVALID_ARGUMENT) ||
		    g_error_matches(error_local, G_IO_ERROR, G_IO_ERROR_NOT_FOUND)) {
			g_debug("ignoring: %s", error_local->message);
			g_ptr_array_add(files, g_strdup("firmware.metainfo.xml"));
		} else {
			g_propagate_error(error, g_steal_pointer(&error_local));
			return FALSE;
		}
	} else {
		for (guint i = 0; i < nodes->len; i++) {
			XbNode *n = g_ptr_array_index(nodes, i);
			g_debug("adding: %s", xb_node_get_text(n));
			g_ptr_array_add(files, g_strdup(xb_node_get_text(n)));
		}
	}

	/* success */
	return TRUE;
}

static gboolean
fu_cabinet_sign_enumerate_firmware(FuCabinet *self, GPtrArray *files, GError **error)
{
	g_autoptr(GError) error_local = NULL;
	g_autoptr(GPtrArray) nodes = NULL;
	g_autoptr(XbSilo) silo = fu_cabinet_get_silo(self);

	nodes = xb_silo_query(silo,
			      "components/component[@type='firmware']/releases/"
			      "release/checksum[@target='content']",
			      0,
			      &error_local);
	if (nodes == NULL) {
		if (g_error_matches(error_local, G_IO_ERROR, G_IO_ERROR_INVALID_ARGUMENT) ||
		    g_error_matches(error_local, G_IO_ERROR, G_IO_ERROR_NOT_FOUND)) {
			g_debug("ignoring: %s", error_local->message);
			g_ptr_array_add(files, g_strdup("firmware.bin"));
		} else {
			g_propagate_error(error, g_steal_pointer(&error_local));
			return FALSE;
		}
	} else {
		for (guint i = 0; i < nodes->len; i++) {
			XbNode *n = g_ptr_array_index(nodes, i);
			g_debug("adding: %s", xb_node_get_attr(n, "filename"));
			g_ptr_array_add(files, g_strdup(xb_node_get_attr(n, "filename")));
		}
	}
	g_error(
	    "%s",
	    xb_silo_export(silo,
			   XB_NODE_EXPORT_FLAG_FORMAT_MULTILINE | XB_NODE_EXPORT_FLAG_FORMAT_INDENT,
			   NULL));

	/* success */
	return TRUE;
}

/**
 * fu_cabinet_sign:
 * @self: a #FuCabinet
 * @cert: a PCKS#7 certificate
 * @privkey: a private key
 * @flags: signing flags, e.g. %FU_CABINET_SIGN_FLAG_NONE
 * @error: (nullable): optional return location for an error
 *
 * Sign the cabinet archive using JCat.
 *
 * Returns: %TRUE for success
 *
 * Since: 1.6.0
 **/
gboolean
fu_cabinet_sign(FuCabinet *self,
		GBytes *cert,
		GBytes *privkey,
		FuCabinetSignFlags flags,
		GError **error)
{
	g_autoptr(GBytes) new_bytes = NULL;
	g_autoptr(GBytes) old_bytes = NULL;
	g_autoptr(GOutputStream) ostr = NULL;
	g_autoptr(GPtrArray) filenames = g_ptr_array_new_with_free_func(g_free);
	g_autoptr(JcatContext) jcat_context = jcat_context_new();
	g_autoptr(JcatEngine) jcat_engine = NULL;
	g_autoptr(JcatFile) jcat_file = jcat_file_new();

	/* load existing .jcat file if it exists */
	old_bytes = fu_cabinet_get_file(self, "firmware.jcat", NULL);
	if (old_bytes != NULL) {
		g_autoptr(GInputStream) istr = NULL;
		istr = g_memory_input_stream_new_from_bytes(old_bytes);
		if (!jcat_file_import_stream(jcat_file, istr, JCAT_IMPORT_FLAG_NONE, NULL, error))
			return FALSE;
	}

	/* get all the metainfo.xml and firmware.bin files */
	if (!fu_cabinet_sign_enumerate_metainfo(self, filenames, error))
		return FALSE;
	if (!fu_cabinet_sign_enumerate_firmware(self, filenames, error))
		return FALSE;

	/* sign all the files */
	jcat_engine = jcat_context_get_engine(jcat_context, JCAT_BLOB_KIND_PKCS7, error);
	if (jcat_engine == NULL)
		return FALSE;
	for (guint i = 0; i < filenames->len; i++) {
		const gchar *filename = g_ptr_array_index(filenames, i);
		if (!fu_cabinet_sign_filename(self,
					      filename,
					      jcat_engine,
					      jcat_file,
					      cert,
					      privkey,
					      error))
			return FALSE;
	}

	/* export new JCat file and add it to the archive */
	ostr = g_memory_output_stream_new_resizable();
	if (!jcat_file_export_stream(jcat_file, ostr, JCAT_EXPORT_FLAG_NONE, NULL, error))
		return FALSE;
	new_bytes = g_memory_output_stream_steal_as_bytes(G_MEMORY_OUTPUT_STREAM(ostr));
	fu_cabinet_add_file(self, "firmware.jcat", new_bytes);
	return TRUE;
}

/**
 * fu_cabinet_parse:
 * @self: a #FuCabinet
 * @data: cabinet archive
 * @flags: parse flags, e.g. %FU_CABINET_PARSE_FLAG_NONE
 * @error: (nullable): optional return location for an error
 *
 * Parses the cabinet archive.
 *
 * Returns: %TRUE for success
 *
 * Since: 1.4.0
 **/
gboolean
fu_cabinet_parse(FuCabinet *self, GBytes *data, FuCabinetParseFlags flags, GError **error)
{
	g_autoptr(GError) error_local = NULL;
	g_autoptr(GPtrArray) components = NULL;
	g_autoptr(XbQuery) query = NULL;

	g_return_val_if_fail(FU_IS_CABINET(self), FALSE);
	g_return_val_if_fail(data != NULL, FALSE);
	g_return_val_if_fail(error == NULL || *error == NULL, FALSE);
	g_return_val_if_fail(self->silo == NULL, FALSE);

	/* decompress */
	if (!fu_cabinet_decompress(self, data, error))
		return FALSE;

	/* build xmlb silo */
	self->container_checksum = g_compute_checksum_for_bytes(G_CHECKSUM_SHA1, data);
	if (!fu_cabinet_build_silo(self, data, error))
		return FALSE;

	/* sanity check */
	components =
	    xb_silo_query(self->silo, "components/component[@type='firmware']", 0, &error_local);
	if (components == NULL) {
		g_set_error(error,
			    FWUPD_ERROR,
			    FWUPD_ERROR_INVALID_FILE,
			    "archive contained no valid metadata: %s",
			    error_local->message);
		return FALSE;
	}

	/* prepare query */
	query = xb_query_new_full(self->silo,
				  "releases/release",
#if LIBXMLB_CHECK_VERSION(0, 2, 0)
				  XB_QUERY_FLAG_FORCE_NODE_CACHE,
#else
				  XB_QUERY_FLAG_NONE,
#endif
				  error);
	if (query == NULL)
		return FALSE;

	/* process each listed release */
	for (guint i = 0; i < components->len; i++) {
		XbNode *component = g_ptr_array_index(components, i);
		g_autoptr(GPtrArray) releases = NULL;
		releases = xb_node_query_full(component, query, &error_local);
		if (releases == NULL) {
			g_set_error(error,
				    FWUPD_ERROR,
				    FWUPD_ERROR_INVALID_FILE,
				    "no releases in metainfo file: %s",
				    error_local->message);
			return FALSE;
		}
		for (guint j = 0; j < releases->len; j++) {
			XbNode *rel = g_ptr_array_index(releases, j);
			g_debug("processing release: %s", xb_node_get_attr(rel, "version"));
			if (!fu_cabinet_parse_release(self, rel, error))
				return FALSE;
		}
	}

	/* success */
	return TRUE;
}

/**
 * fu_cabinet_new:
 *
 * Returns: a #FuCabinet
 *
 * Since: 1.4.0
 **/
FuCabinet *
fu_cabinet_new(void)
{
	return g_object_new(FU_TYPE_CABINET, NULL);
}