diff src/mac/pmac/pmac_shift_xor.c @ 280:59400faa4b44 libtomcrypt-orig libtomcrypt-1.05

Re-import libtomcrypt 1.05 for cleaner propagating. From crypt-1.05.tar.bz2, SHA1 of 88250202bb51570dc64f7e8f1c943cda9479258f
author Matt Johnston <matt@ucc.asn.au>
date Wed, 08 Mar 2006 12:58:00 +0000
parents
children d5faf4814ddb
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--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/mac/pmac/pmac_shift_xor.c	Wed Mar 08 12:58:00 2006 +0000
@@ -0,0 +1,44 @@
+/* LibTomCrypt, modular cryptographic library -- Tom St Denis
+ *
+ * LibTomCrypt is a library that provides various cryptographic
+ * algorithms in a highly modular and flexible manner.
+ *
+ * The library is free for all purposes without any express
+ * guarantee it works.
+ *
+ * Tom St Denis, [email protected], http://libtomcrypt.org
+ */
+#include "tomcrypt.h"
+
+/** 
+   @file pmac_shift_xor.c
+   PMAC implementation, internal function, by Tom St Denis 
+*/
+
+#ifdef PMAC
+
+/**
+  Internal function.  Performs the state update (adding correct multiple)
+  @param pmac   The PMAC state.
+*/
+void pmac_shift_xor(pmac_state *pmac)
+{
+   int x, y;
+   y = pmac_ntz(pmac->block_index++);
+#ifdef LTC_FAST
+   for (x = 0; x < pmac->block_len; x += sizeof(LTC_FAST_TYPE)) {
+       *((LTC_FAST_TYPE*)((unsigned char *)pmac->Li + x)) ^=
+       *((LTC_FAST_TYPE*)((unsigned char *)pmac->Ls[y] + x));
+   }
+#else
+   for (x = 0; x < pmac->block_len; x++) {
+       pmac->Li[x] ^= pmac->Ls[y][x];
+   }
+#endif
+}
+
+#endif
+
+/* $Source: /cvs/libtom/libtomcrypt/src/mac/pmac/pmac_shift_xor.c,v $ */
+/* $Revision: 1.4 $ */
+/* $Date: 2005/05/05 14:35:59 $ */