check IMA file measurements against database reference

src/libpts/pts/pts_database.c

@@ -39,6 +39,38 @@ struct private_pts_database_t {
 
 };
 
+METHOD(pts_database_t, check_file_measurement, status_t,
+	private_pts_database_t *this, char *product, pts_meas_algorithms_t algo,
+	chunk_t measurement, char *filename)
+{
+	enumerator_t *e;
+	chunk_t hash;
+	status_t status;
+
+	e = this->db->query(this->db,
+		"SELECT fh.hash FROM file_hashes AS fh"
+		"JOIN files AS f ON f.id = fh.file"
+		"JOIN products AS p ON p.id = fh.product "
+		"WHERE p.product = ? AND f.file = ? AND fh.algo = ?",
+		DB_TEXT, product, DB_TEXT, filename, DB_INT, algo, DB_BLOB);
+	if (!e)
+	{
+		return FAILED;
+	}
+	if (e->enumerate(e, &hash))
+	{
+		status = chunk_equals(measurement, hash) ?
+				SUCCESS : VERIFY_ERROR;
+	}
+	else
+	{
+		status = NOT_FOUND;
+	}
+	e->destroy(e);
+
+	return status;
+}
+
 METHOD(pts_database_t, create_file_meas_enumerator, enumerator_t*,
 	private_pts_database_t *this, char *product)
 {