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fu-cabinet.c
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fu-cabinet.c
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/*
* 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"
#include "fu-string.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;
gchar *container_checksum_alt;
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_free(self->container_checksum_alt);
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();
#ifdef HAVE_GCAB_CABINET_ADD_ALLOWED_COMPRESSION
gcab_cabinet_add_allowed_compression(self->gcab_cabinet, GCAB_COMPRESSION_NONE);
gcab_cabinet_add_allowed_compression(self->gcab_cabinet, GCAB_COMPRESSION_MSZIP);
#endif
self->builder = xb_builder_new();
self->jcat_file = jcat_file_new();
self->jcat_context = jcat_context_new();
#if LIBJCAT_CHECK_VERSION(0, 1, 13)
jcat_context_blob_kind_allow(self->jcat_context, JCAT_BLOB_KIND_SHA256);
jcat_context_blob_kind_allow(self->jcat_context, JCAT_BLOB_KIND_SHA512);
jcat_context_blob_kind_allow(self->jcat_context, JCAT_BLOB_KIND_PKCS7);
jcat_context_blob_kind_allow(self->jcat_context, JCAT_BLOB_KIND_GPG);
#endif
}
/**
* 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='source']", 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 = 0;
if (!fu_strtoull(xb_node_get_text(nsize), &size, 0, G_MAXSIZE, error))
return FALSE;
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,
const gchar *attr2_name,
const gchar *attr2_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)
continue;
if (g_strcmp0(xb_builder_node_get_attr(bc, attr2_name), attr2_value) == 0)
return g_object_ref(bc);
}
return NULL;
}
static void
fu_cabinet_ensure_container_checksum(XbBuilderNode *bn, const gchar *type, const gchar *checksum)
{
g_autoptr(XbBuilderNode) csum = NULL;
/* verify it exists */
csum = _xb_builder_node_get_child_by_element_attr(bn,
"checksum",
"type",
type,
"target",
"container");
if (csum == NULL) {
csum = xb_builder_node_insert(bn,
"checksum",
"type",
type,
"target",
"container",
NULL);
}
/* verify it is correct */
if (g_strcmp0(xb_builder_node_get_text(csum), 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),
checksum);
}
xb_builder_node_set_text(csum, checksum, -1);
}
}
static gboolean
fu_cabinet_ensure_container_checksum_cb(XbBuilderFixup *builder_fixup,
XbBuilderNode *bn,
gpointer user_data,
GError **error)
{
FuCabinet *self = FU_CABINET(user_data);
/* not us */
if (g_strcmp0(xb_builder_node_get_element(bn), "release") != 0)
return TRUE;
fu_cabinet_ensure_container_checksum(bn, "sha1", self->container_checksum);
fu_cabinet_ensure_container_checksum(bn, "sha256", self->container_checksum_alt);
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_text(bn_info, "metadata_trust", NULL, 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("EnsureContainerChecksum",
fu_cabinet_ensure_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,
#if LIBXMLB_CHECK_VERSION(0, 3, 4)
XB_BUILDER_COMPILE_FLAG_SINGLE_ROOT,
#else
XB_BUILDER_COMPILE_FLAG_NONE,
#endif
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")));
}
}
/* 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
**/