des_keyschedule: add license

SideChannelMarvels · Nov 17, 2016 · 5e8e778 · 5e8e778
1 parent 35bf29e
commit 5e8e778
Showing 1 changed file with 47 additions and 0 deletions.
diff --git a/utils/des_keyschedule.c b/utils/des_keyschedule.c
@@ -1,3 +1,50 @@
+/* ===================================================================== */
+/* This file is a little helper to compute DES key scheduling            */
+/* from the first round key                                              */
+/* Original authors: Charles Hubain <me@haxelion.eu>  2016               */
+/*                   Philippe Teuwen <phil@teuwen.org> 2016              */
+/*                                                                       */
+/* Usage:                                                                */
+/* des_keyschedule DES_key_in_hex                                        */
+/* des_keyschedule Round_key_in_hex plaintext_in_hex ciphertext_in_hex   */
+/*                                                                       */
+/* Examples:                                                             */
+/* des_keyschedule 11223344556677881122334455667788                      */
+/* des_keyschedule 23D7F7B876B180306793B37432F5C4FC 1                    */
+/* des_keyschedule 43EDA420DD033E7627347DC2CC6E0B4E 9                    */
+/* des_keyschedule EAC68B6B37C5B51D10F1C8DFDC9FC391 10                   */
+/*                                                                       */
+/* Note that parity bits are always discarded                            */
+/*                                                                       */
+/* Based on the unlicensed DES code https://github.com/mimoo/DES         */
+/* and released under the same licensing terms:                          */
+/*                                                                       */
+/* This is free and unencumbered software released into the public domain*/
+/*                                                                       */
+/* Anyone is free to copy, modify, publish, use, compile, sell, or       */
+/* distribute this software, either in source code form or as a compiled */
+/* binary, for any purpose, commercial or non-commercial, and by any     */
+/* means.                                                                */
+/*                                                                       */
+/* In jurisdictions that recognize copyright laws, the author or authors */
+/* of this software dedicate any and all copyright interest in the       */
+/* software to the public domain. We make this dedication for the benefit*/
+/* of the public at large and to the detriment of our heirs and          */
+/* successors. We intend this dedication to be an overt act of           */
+/* relinquishment in perpetuity of all present and future rights to this */
+/* software under copyright law.                                         */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR     */
+/* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, */
+/* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR */
+/* OTHER DEALINGS IN THE SOFTWARE.                                       */
+/*                                                                       */
+/* For more information, please refer to <http://unlicense.org/>         */
+/* ===================================================================== */
+
 #include "DES.h"
 #include <inttypes.h>
 #include <stdlib.h>