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118 lines
5.0 KiB
118 lines
5.0 KiB
7 months ago
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/* Microsoft Reference Implementation for TPM 2.0
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*
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* The copyright in this software is being made available under the BSD License,
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* included below. This software may be subject to other third party and
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* contributor rights, including patent rights, and no such rights are granted
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* under this license.
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*
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* Copyright (c) Microsoft Corporation
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*
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* All rights reserved.
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*
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* BSD License
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* Redistributions of source code must retain the above copyright notice, this list
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* of conditions and the following disclaimer.
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*
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* Redistributions in binary form must reproduce the above copyright notice, this
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* list of conditions and the following disclaimer in the documentation and/or
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* other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ""AS IS""
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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//** Introduction
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//
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// This file contains the implementation of the symmetric block cipher modes
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// allowed for a TPM. These functions only use the single block encryption functions
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// of the selected symmetric cryptographic library.
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//** Includes, Defines, and Typedefs
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#ifndef CRYPT_SYM_H
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#define CRYPT_SYM_H
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#if ALG_AES
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# define IF_IMPLEMENTED_AES(op) op(AES, aes)
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#else
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# define IF_IMPLEMENTED_AES(op)
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#endif
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#if ALG_SM4
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# define IF_IMPLEMENTED_SM4(op) op(SM4, sm4)
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#else
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# define IF_IMPLEMENTED_SM4(op)
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#endif
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#if ALG_CAMELLIA
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# define IF_IMPLEMENTED_CAMELLIA(op) op(CAMELLIA, camellia)
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#else
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# define IF_IMPLEMENTED_CAMELLIA(op)
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#endif
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#if ALG_TDES
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# define IF_IMPLEMENTED_TDES(op) op(TDES, tdes)
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#else
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# define IF_IMPLEMENTED_TDES(op)
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#endif
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#define FOR_EACH_SYM(op) \
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IF_IMPLEMENTED_AES(op) \
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IF_IMPLEMENTED_SM4(op) \
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IF_IMPLEMENTED_CAMELLIA(op) \
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IF_IMPLEMENTED_TDES(op)
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// Macros for creating the key schedule union
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#define KEY_SCHEDULE(SYM, sym) tpmKeySchedule##SYM sym;
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#define TDES DES[3]
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typedef union tpmCryptKeySchedule_t {
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FOR_EACH_SYM(KEY_SCHEDULE)
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#if SYMMETRIC_ALIGNMENT == 8
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uint64_t alignment;
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#else
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uint32_t alignment;
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#endif
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} tpmCryptKeySchedule_t;
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// Each block cipher within a library is expected to conform to the same calling
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// conventions with three parameters ('keySchedule', 'in', and 'out') in the same
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// order. That means that all algorithms would use the same order of the same
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// parameters. The code is written assuming the ('keySchedule', 'in', and 'out')
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// order. However, if the library uses a different order, the order can be changed
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// with a SWIZZLE macro that puts the parameters in the correct order.
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// Note that all algorithms have to use the same order and number of parameters
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// because the code to build the calling list is common for each call to encrypt
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// or decrypt with the algorithm chosen by setting a function pointer to select
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// the algorithm that is used.
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# define ENCRYPT(keySchedule, in, out) \
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encrypt(SWIZZLE(keySchedule, in, out))
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# define DECRYPT(keySchedule, in, out) \
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decrypt(SWIZZLE(keySchedule, in, out))
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// Note that the macros rely on 'encrypt' as local values in the
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// functions that use these macros. Those parameters are set by the macro that
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// set the key schedule to be used for the call.
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#define ENCRYPT_CASE(ALG, alg) \
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case TPM_ALG_##ALG: \
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TpmCryptSetEncryptKey##ALG(key, keySizeInBits, &keySchedule.alg); \
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encrypt = (TpmCryptSetSymKeyCall_t)TpmCryptEncrypt##ALG; \
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break;
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#define DECRYPT_CASE(ALG, alg) \
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case TPM_ALG_##ALG: \
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TpmCryptSetDecryptKey##ALG(key, keySizeInBits, &keySchedule.alg); \
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decrypt = (TpmCryptSetSymKeyCall_t)TpmCryptDecrypt##ALG; \
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break;
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#endif // CRYPT_SYM_H
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