--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/encauth/gcm/gcm_reset.c	Fri May 06 13:23:02 2005 +0000
@@ -0,0 +1,40 @@
+/* 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
+ */
+
+/**
+   @file gcm_reset.c
+   GCM implementation, reset a used state so it can accept IV data, by Tom St Denis
+*/
+#include "tomcrypt.h"
+
+#ifdef GCM_MODE
+
+/**
+  Reset a GCM state to as if you just called gcm_init().  This saves the initialization time.
+  @param gcm   The GCM state to reset
+  @return CRYPT_OK on success
+*/
+int gcm_reset(gcm_state *gcm)
+{
+   LTC_ARGCHK(gcm != NULL);
+
+   zeromem(gcm->buf, sizeof(gcm->buf));
+   zeromem(gcm->X,   sizeof(gcm->X));
+   gcm->mode     = GCM_MODE_IV;
+   gcm->ivmode   = 0;
+   gcm->buflen   = 0;
+   gcm->totlen   = 0;
+   gcm->pttotlen = 0;
+  
+   return CRYPT_OK;
+}
+
+#endif