X-Git-Url: https://git.cryptolib.org/?p=avr-crypto-lib.git;a=blobdiff_plain;f=skein%2Fthreefish_invmix_c.c;fp=skein%2Fthreefish_invmix_c.c;h=f66488856fe09c32c6c9802a1dd27e29b912bbde;hp=0000000000000000000000000000000000000000;hb=4f50c75ee5a6cc88bf7ea71957ed509e298e6c25;hpb=7701e318e4e2bac7f84dbf6e368f1501814948fc

diff --git a/skein/threefish_invmix_c.c b/skein/threefish_invmix_c.c
new file mode 100644
index 0000000..f664888
--- /dev/null
+++ b/skein/threefish_invmix_c.c
@@ -0,0 +1,39 @@
+/* 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;
+}