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77 lines
2.0 KiB
C
77 lines
2.0 KiB
C
/*
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---------------------------------------------------------------------------
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Copyright (c) 2003, Dr Brian Gladman, Worcester, UK. All rights reserved.
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LICENSE TERMS
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The free distribution and use of this software is allowed (with or without
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changes) provided that:
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1. source code distributions include the above copyright notice, this
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list of conditions and the following disclaimer;
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2. binary distributions include the above copyright notice, this list
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of conditions and the following disclaimer in their documentation;
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3. the name of the copyright holder is not used to endorse products
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built using this software without specific written permission.
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DISCLAIMER
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This software is provided 'as is' with no explicit or implied warranties
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in respect of its properties, including, but not limited to, correctness
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and/or fitness for purpose.
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---------------------------------------------------------------------------
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Issue Date: 31/01/2004
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*/
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/* Adapted for TrueCrypt by the TrueCrypt Foundation */
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#ifndef _GCM_H
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#define _GCM_H
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#include <inttypes.h>
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#if defined(__cplusplus)
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extern "C"
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{
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#endif
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#define CBLK_LEN 16 /* encryption block length */
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#define CBLK_LEN8 8
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typedef struct
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{
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uint32_t gf_t8k[CBLK_LEN * 2][16][CBLK_LEN / 4];
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} GfCtx8k;
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typedef struct
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{
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uint32_t gf_t4k[CBLK_LEN8 * 2][16][CBLK_LEN / 4];
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} GfCtx4k64;
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typedef struct
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{
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/* union not used to support faster mounting */
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uint32_t gf_t128[CBLK_LEN * 2 / 2][16][CBLK_LEN / 4];
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uint32_t gf_t64[CBLK_LEN8 * 2][16][CBLK_LEN8 / 4];
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} GfCtx;
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typedef int ret_type;
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void GfMul128 (void *a, const void* b);
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void GfMul128Tab(unsigned char a[16], GfCtx8k *ctx);
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int Gf128Tab64Init (uint8_t *a, GfCtx *ctx);
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void Gf128MulBy64Tab (uint8_t a[8], uint8_t p[16], GfCtx *ctx);
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int Gf64TabInit (uint8_t *a, GfCtx *ctx);
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void Gf64MulTab (unsigned char a[8], unsigned char p[8], GfCtx *ctx);
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void MirrorBits128 (uint8_t *a);
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void MirrorBits64 (uint8_t *a);
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int GfMulSelfTest (void);
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#if defined(__cplusplus)
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}
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#endif
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#endif
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