1 files changed, 76 insertions, 0 deletions
diff --git a/src/Common/GfMul.h b/src/Common/GfMul.h
new file mode 100644
index 00000000..ce5aa022
--- /dev/null
+++ b/src/Common/GfMul.h
@@ -0,0 +1,76 @@
+/*
+ ---------------------------------------------------------------------------
+ Copyright (c) 2003, Dr Brian Gladman, Worcester, UK.   All rights reserved.
+
+ LICENSE TERMS
+
+ The free distribution and use of this software is allowed (with or without
+ changes) provided that:
+
+  1. source code distributions include the above copyright notice, this
+     list of conditions and the following disclaimer;
+
+  2. binary distributions include the above copyright notice, this list
+     of conditions and the following disclaimer in their documentation;
+
+  3. the name of the copyright holder is not used to endorse products
+     built using this software without specific written permission.
+
+ DISCLAIMER
+
+ This software is provided 'as is' with no explicit or implied warranties
+ in respect of its properties, including, but not limited to, correctness
+ and/or fitness for purpose.
+ ---------------------------------------------------------------------------
+ Issue Date: 31/01/2004
+*/
+
+/* Adapted for TrueCrypt */
+
+#ifndef _GCM_H
+#define _GCM_H
+
+#include "Tcdefs.h"
+
+#if defined(__cplusplus)
+extern "C"
+{
+#endif
+
+#define CBLK_LEN   16  /* encryption block length */
+#define CBLK_LEN8  8
+
+typedef struct
+{
+    unsigned __int32 gf_t8k[CBLK_LEN * 2][16][CBLK_LEN / 4];
+} GfCtx8k;
+
+typedef struct
+{
+		unsigned __int32 gf_t4k[CBLK_LEN8 * 2][16][CBLK_LEN / 4];
+} GfCtx4k64;
+
+typedef struct
+{
+	/* union not used to support faster mounting */
+    unsigned __int32 gf_t128[CBLK_LEN * 2 / 2][16][CBLK_LEN / 4];
+    unsigned __int32 gf_t64[CBLK_LEN8 * 2][16][CBLK_LEN8 / 4];
+} GfCtx;
+
+typedef int  ret_type;
+
+void GfMul128 (void *a, const void* b);
+void GfMul128Tab(unsigned char a[16], GfCtx8k *ctx);
+int Gf128Tab64Init (unsigned __int8 *a, GfCtx *ctx);
+void Gf128MulBy64Tab (unsigned __int8 a[8], unsigned __int8 p[16], GfCtx *ctx);
+int Gf64TabInit (unsigned __int8 *a, GfCtx *ctx);
+void Gf64MulTab (unsigned char a[8], unsigned char p[8], GfCtx *ctx);
+void MirrorBits128 (unsigned __int8 *a);
+void MirrorBits64 (unsigned __int8 *a);
+BOOL GfMulSelfTest ();
+
+#if defined(__cplusplus)
+}
+#endif
+
+#endif