/********************************************************************************/
/*										*/
/*		Implementation of the symmetric block cipher modes 		*/
/*			     Written by Ken Goldman				*/
/*		       IBM Thomas J. Watson Research Center			*/
/*            $Id: CryptSym.h 1047 2017-07-20 18:27:34Z kgoldman $		*/
/*										*/
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/********************************************************************************/

/* kgold - Missing in 146 code merge.  Taken from 142. */

#ifndef CRYPTSYM_H
#define CRYPTSYM_H

union tpmCryptKeySchedule_t {
#ifdef TPM_ALG_AES
    tpmKeyScheduleAES           AES;
#endif
#ifdef TPM_ALG_SM4
    tpmKeyScheduleSM4           SM4;
#endif
#ifdef TPM_ALG_CAMELLIA
    tpmKeyScheduleCAMELLIA      CAMELLIA;
#endif
#ifdef TPM_ALG_TDES
    tpmKeyScheduleTDES          TDES[3];
#endif
#if SYMMETRIC_ALIGNMENT == 8
    uint64_t            alignment;
#else
    uint32_t            alignment;
#endif
};
/* Each block cipher within a library is expected to conform to the same calling conventions with
   three parameters (keySchedule, in, and out) in the same order. That means that all algorithms
   would use the same order of the same parameters. The code is written assuming the (keySchedule,
   in, and out) order. However, if the library uses a different order, the order can be changed with
   a SWIZZLE macro that puts the parameters in the correct order. Note that all algorithms have to
   use the same order and number of parameters because the code to build the calling list is common
   for each call to encrypt or decrypt with the algorithm chosen by setting a function pointer to
   select the algorithm that is used. */
#   define ENCRYPT(keySchedule, in, out)	\
    encrypt(SWIZZLE(keySchedule, in, out))
#   define DECRYPT(keySchedule, in, out)	\
    decrypt(SWIZZLE(keySchedule, in, out))
/* Note that the macros rely on encrypt as local values in the functions that use these
   macros. Those parameters are set by the macro that set the key schedule to be used for the
   call. */
#define ENCRYPT_CASE(ALG)						\
    case TPM_ALG_##ALG:							\
    TpmCryptSetEncryptKey##ALG(key, keySizeInBits, &keySchedule.ALG);	\
    encrypt = (TpmCryptSetSymKeyCall_t)TpmCryptEncrypt##ALG;		\
    break;
#define DECRYPT_CASE(ALG)						\
    case TPM_ALG_##ALG:							\
    TpmCryptSetDecryptKey##ALG(key, keySizeInBits, &keySchedule.ALG);	\
    decrypt = (TpmCryptSetSymKeyCall_t)TpmCryptDecrypt##ALG;		\
    break;
#ifdef TPM_ALG_AES
#define ENCRYPT_CASE_AES    ENCRYPT_CASE(AES)
#define DECRYPT_CASE_AES    DECRYPT_CASE(AES)
#else
#define ENCRYPT_CASE_AES
#define DECRYPT_CASE_AES
#endif
#ifdef TPM_ALG_SM4
#define ENCRYPT_CASE_SM4    ENCRYPT_CASE(SM4)
#define DECRYPT_CASE_SM4    DECRYPT_CASE(SM4)
#else
#define ENCRYPT_CASE_SM4
#define DECRYPT_CASE_SM4
#endif
#ifdef TPM_ALG_CAMELLIA
#define ENCRYPT_CASE_CAMELLIA    ENCRYPT_CASE(CAMELLIA)
#define DECRYPT_CASE_CAMELLIA    DECRYPT_CASE(CAMELLIA)
#else
#define ENCRYPT_CASE_CAMELLIA
#define DECRYPT_CASE_CAMELLIA
#endif
#ifdef TPM_ALG_TDES
#define ENCRYPT_CASE_TDES    ENCRYPT_CASE(TDES)
#define DECRYPT_CASE_TDES    DECRYPT_CASE(TDES)
#else
#define ENCRYPT_CASE_TDES
#define DECRYPT_CASE_TDES
#endif
/* For each algorithm the case will either be defined or null. */
#define     SELECT(direction)			\
    switch(algorithm)				\
	{					\
	    direction##_CASE_AES		\
		direction##_CASE_SM4		\
		direction##_CASE_CAMELLIA	\
		direction##_CASE_TDES		\
	  default:				\
	    return TPM_RC_FAILURE;		\
	}



#endif
