nvboot_crypto_signatures.h

/*
 * Copyright (c) 2014 NVIDIA Corporation.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
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 *    notice, this list of conditions and the following disclaimer.
 *  * Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *  * Neither the name of NVIDIA CORPORATION nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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 */

/**
 * \file nvboot_crypto_signature.h
 *
 * Defines the structure to hold the various possible types of
 * cryptographic signatures supported by the Boot ROM.
 *
 */
#ifndef NVBOOT_CRYPTO_SIGNATURE_H
#define NVBOOT_CRYPTO_SIGNATURE_H

#if defined (_MSC_VER)
#define DECLARE_ALIGNED(var, n) __declspec(align(n)) var
#elif defined __GNUC__
#define DECLARE_ALIGNED(var, n) var __attribute__((aligned(n)))
#endif

/**
 * \brief           Crypto signature structure.
 *
 * \note Force AES block alignment for all members. This matters
 *       where signatures are sometimes contained in signed sections
 *       (like in the case where BootLoader signatures are inside the
 *       BCT). AES-CMAC and RSASSA-PSS signatures are inherently
 *       16-byte aligned so the attribute isn't necessary. However,
 *       making it explicit doesn't hurt.
 */
typedef struct NvBootCryptoSignaturesRec
{
    DECLARE_ALIGNED(NvBootAesCmacHash AesCmacHash , NVBOOT_CRYPTO_BUFFER_ALIGNMENT);
    DECLARE_ALIGNED(NvBootCryptoRsaSsaPssSig RsaSsaPssSig , NVBOOT_CRYPTO_BUFFER_ALIGNMENT);
    DECLARE_ALIGNED(NvBootEcdsaSig EcdsaSig , NVBOOT_CRYPTO_BUFFER_ALIGNMENT);
} NvBootCryptoSignatures;

#endif