new makefile and modified build process

[avr-crypto-lib.git] / skein / threefish_invmix_c.c

diff --git a/skein/threefish_invmix_c.c b/skein/threefish_invmix_c.c
new file mode 100644 (file)
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--- /dev/null
+++ b/skein/threefish_invmix_c.c
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+/* threefish_invmix_c.c */
+/*
+    This file is part of the AVR-Crypto-Lib.
+    Copyright (C) 2009  Daniel Otte (daniel.otte@rub.de)
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+/*
+ * \author  Daniel Otte
+ * \email   daniel.otte@rub.de
+ * \date    2009-03-21
+ * \license GPLv3 or later
+ * 
+ * 
+ * 
+ */
+
+#include <stdint.h>
+
+#define X0 (((uint64_t*)data)[0])
+#define X1 (((uint64_t*)data)[1])
+void threefish_invmix(void* data, uint8_t rot){
+       uint64_t x;
+       x = X1;
+       x ^= X0;
+       X1 = ((x>>rot)|(x<<(64-rot)));
+       X0 -= X1;
+}