propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)

            to branch 'au.asn.ucc.matt.dropbear' (head fdf4a7a3b97ae5046139915de7e40399cceb2c01)

--HG--
extra : convert_revision : dc4809882e1b9f2dcd3f8bbe38c74a0a52c39ce4

1 files changed, 44 insertions, 0 deletions

diff --git a/libtomcrypt/src/mac/pmac/pmac_shift_xor.c b/libtomcrypt/src/mac/pmac/pmac_shift_xor.c
new file mode 100644
index 0000000..f24c22b
--- /dev/null
+++ b/libtomcrypt/src/mac/pmac/pmac_shift_xor.c
@@ -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, tomstdenis@gmail.com, 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 $ */