static int ds_sds_compose_add_component_dependencies(xmlDocPtr doc, xmlNodePtr datastream, struct oscap_source *component_source, xmlNodePtr catalog, int component_type)
{
xmlDocPtr component_doc = oscap_source_get_xmlDoc(component_source);
if (component_doc == NULL)
{
return -1;
}
xmlXPathContextPtr xpathCtx = xmlXPathNewContext(component_doc);
if (xpathCtx == NULL)
{
oscap_seterr(OSCAP_EFAMILY_XML, "Error: unable to create new XPath context.");
return -1;
}
xmlXPathObjectPtr xpathObj = xmlXPathEvalExpression(
// we want robustness and support for future versions, this expression
// retrieves check-content-refs from any namespace
BAD_CAST _get_dep_xpath_for_type(component_type),
xpathCtx);
if (xpathObj == NULL)
{
oscap_seterr(OSCAP_EFAMILY_XML, "Error: Unable to evalute XPath expression.");
xmlXPathFreeContext(xpathCtx);
return -1;
}
xmlNsPtr cat_ns = xmlSearchNsByHref(doc, datastream, BAD_CAST cat_ns_uri);
xmlNodeSetPtr nodeset = xpathObj->nodesetval;
if (nodeset != NULL)
{
struct oscap_htable *exported = oscap_htable_new();
char* filepath_cpy = oscap_strdup(oscap_source_readable_origin(component_source));
const char* dir = dirname(filepath_cpy);
for (int i = 0; i < nodeset->nodeNr; i++)
{
xmlNodePtr node = nodeset->nodeTab[i];
if (node->type != XML_ELEMENT_NODE)
continue;
if (xmlHasProp(node, BAD_CAST "href"))
{
char* href = (char*)xmlGetProp(node, BAD_CAST "href");
if (oscap_htable_get(exported, href) != NULL) {
// This path has been already exported. Do not export duplicate.
xmlFree(href);
continue;
}
oscap_htable_add(exported, href, "");
if (oscap_acquire_url_is_supported(href)) {
/* If the referenced component is remote one, do not include
* it within the DataStream. Such component shall only be
* downloaded once the scan is run. */
xmlFree(href);
continue;
}
char* real_path = (strcmp(dir, "") == 0 || strcmp(dir, ".") == 0) ?
oscap_strdup(href) : oscap_sprintf("%s/%s", dir, href);
char* mangled_path = ds_sds_mangle_filepath(real_path);
char* cref_id = oscap_sprintf("scap_org.open-scap_cref_%s", mangled_path);
int counter = 0;
while (ds_sds_find_component_ref(datastream, cref_id) != NULL) {
// While the given component ID already exists in the document.
oscap_free(cref_id);
cref_id = oscap_sprintf("scap_org.open-scap_cref_%s%03d", mangled_path, counter++);
}
oscap_free(mangled_path);
char* uri = oscap_sprintf("#%s", cref_id);
// we don't want duplicated uri elements in the catalog
if (ds_sds_compose_catalog_has_uri(doc, catalog, uri) == 0)
{
oscap_free(uri);
oscap_free(cref_id);
oscap_free(real_path);
xmlFree(href);
continue;
}
int ret = ds_sds_compose_add_component_with_ref(doc, datastream, real_path, cref_id);
if (ret == 0) {
xmlNodePtr catalog_uri = xmlNewNode(cat_ns, BAD_CAST "uri");
xmlSetProp(catalog_uri, BAD_CAST "name", BAD_CAST href);
xmlSetProp(catalog_uri, BAD_CAST "uri", BAD_CAST uri);
xmlAddChild(catalog, catalog_uri);
}
oscap_free(cref_id);
oscap_free(uri);
oscap_free(real_path);
xmlFree(href);
if (ret < 0) {
// oscap_seterr has already been called
oscap_htable_free0(exported);
return -1;
}
}
}
oscap_htable_free0(exported);
oscap_free(filepath_cpy);
}
xmlXPathFreeObject(xpathObj);
xmlXPathFreeContext(xpathCtx);
return 0;
}
static int ds_sds_dump_component_by_href(struct ds_sds_session *session, char* xlink_href, char *target_filename_dirname, const char* relative_filepath, char* cref_id, char **component_id)
{
if (!xlink_href || strlen(xlink_href) < 2)
{
oscap_seterr(OSCAP_EFAMILY_XML, "No or invalid xlink:href attribute on given component-ref.");
return -1;
}
if (xlink_href[0] == '#')
{
*component_id = xlink_href + 1;
return ds_sds_dump_local_component(*component_id, session, target_filename_dirname, relative_filepath);
} else if (oscap_str_startswith(xlink_href, "file:")){
char* sep = strchr(xlink_href, '#');
const char *filename = xlink_href + strlen("file:");
if (sep == NULL) {
*component_id = NULL;
} else {
*sep = '\0';
*component_id = sep + 1;
}
return ds_sds_dump_file_component(filename, *component_id, session, target_filename_dirname, relative_filepath);
} else if (oscap_acquire_url_is_supported(xlink_href)){
char *sep = strchr(xlink_href, '#');
char* url = xlink_href;
if (sep == NULL) {
*component_id = NULL;
} else {
*sep = '\0';
*component_id = sep + 1;
}
if (!ds_sds_session_fetch_remote_resources(session)) {
static bool fetch_remote_resources_suggested = false;
if (!fetch_remote_resources_suggested) {
fetch_remote_resources_suggested = true;
ds_sds_session_remote_resources_progress(session)(true, "WARNING: Datastream component '%s' points out to the remote '%s'. "
"Use '--fetch-remote-resources' option to download it.\n", cref_id, url);
}
ds_sds_session_remote_resources_progress(session)(true, "WARNING: Skipping '%s' file which is referenced from datastream\n", url);
return -2;
}
return ds_dsd_dump_remote_component(url, *component_id, session, target_filename_dirname, relative_filepath);
} else {
oscap_seterr(OSCAP_EFAMILY_XML, "Unsupported type of xlink:href attribute on given component-ref - '%s'.", xlink_href);
return -1;
}
return 0;
}
