int sc_pkcs15_make_absolute_path(const sc_path_t *parent, sc_path_t *child)
{
/* a 0 length path stays a 0 length path */
if (child->len == 0)
return SC_SUCCESS;
if (sc_compare_path_prefix(sc_get_mf_path(), child))
return SC_SUCCESS;
return sc_concatenate_path(child, parent, child);
}
/* SELECT FILE: call the ISO SELECT FILE implementation and parse
* asepcos specific security attributes.
*/
static int asepcos_select_file(sc_card_t *card, const sc_path_t *in_path,
sc_file_t **file)
{
int r;
sc_path_t npath = *in_path;
LOG_FUNC_CALLED(card->ctx);
if (in_path->type == SC_PATH_TYPE_PATH) {
/* check the current DF to avoid unnecessary re-selection of
* the MF (as this might invalidate a security status) */
sc_path_t tpath;
memset(&tpath, 0, sizeof tpath);
r = asepcos_get_current_df_path(card, &tpath);
/* workaround: as opensc can't handle paths with file id
* and application names in it let's ignore the current
* DF if the returned path contains a unsupported tag.
*/
if (r != SC_ERROR_INVALID_ASN1_OBJECT && r != SC_SUCCESS)
return r;
if (r == SC_SUCCESS && sc_compare_path_prefix(&tpath, &npath) != 0) {
/* remove the currently selected DF from the path */
if (tpath.len == npath.len) {
/* we are already in the requested DF */
if (file == NULL)
/* no file information requested =>
* nothing to do */
return SC_SUCCESS;
} else {
/* shorten path */
r = sc_path_set(&npath, 0, &in_path->value[tpath.len],
npath.len - tpath.len, 0, 0);
if (r != SC_SUCCESS)
return r;
if (npath.len == 2)
npath.type = SC_PATH_TYPE_FILE_ID;
else
npath.type = SC_PATH_TYPE_PATH;
}
}
}
r = iso_ops->select_file(card, &npath, file);
/* XXX: this doesn't look right */
if (file != NULL && *file != NULL)
if ((*file)->ef_structure == SC_FILE_EF_UNKNOWN)
(*file)->ef_structure = SC_FILE_EF_TRANSPARENT;
if (r == SC_SUCCESS && file != NULL && *file != NULL) {
r = asepcos_parse_sec_attr(card, *file, (*file)->sec_attr, (*file)->sec_attr_len);
if (r != SC_SUCCESS)
sc_log(card->ctx, "error parsing security attributes");
}
LOG_FUNC_RETURN(card->ctx, r);
}
