--- /dev/null
+/* 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.
+ */
+#include "tomcrypt.h"
+
+/**
+ @file pmac_shift_xor.c
+ PMAC implementation, internal function, by Tom St Denis
+*/
+
+#ifdef LTC_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_PTR_CAST((unsigned char *)pmac->Li + x)) ^=
+ *(LTC_FAST_TYPE_PTR_CAST((unsigned char *)pmac->Ls[y] + x));
+ }
+#else
+ for (x = 0; x < pmac->block_len; x++) {
+ pmac->Li[x] ^= pmac->Ls[y][x];
+ }
+#endif
+}
+
+#endif
+
+/* ref: $Format:%D$ */
+/* git commit: $Format:%H$ */
+/* commit time: $Format:%ai$ */