1 files changed, 9 insertions, 0 deletions
diff --git a/vigenere.c b/vigenere.c
index 5db3e18..9a64c3c 100644
--- a/vigenere.c
+++ b/vigenere.c
@@ -1,3 +1,12 @@
+/*
+ * Copyright (C) 2015  Tomasz Kramkowski <tk@the-tk.com>
+ *
+ * This program is free software. It is licensed under version 3 of the
+ * GNU General Public License.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see [http://www.gnu.org/licenses/].
+ */
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>