/* ====================================================================
 * Copyright (c) 2014 - 2019 The GmSSL Project.  All rights reserved.
 *
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 * modification, are permitted provided that the following conditions
 * are met:
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 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
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 *    distribution.
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 * 3. All advertising materials mentioning features or use of this
 *    software must display the following acknowledgment:
 *    "This product includes software developed by the GmSSL Project.
 *    (http://gmssl.org/)"
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 * 4. The name "GmSSL Project" must not be used to endorse or promote
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 *    guanzhi1980@gmail.com.
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 * 5. Products derived from this software may not be called "GmSSL"
 *    nor may "GmSSL" appear in their names without prior written
 *    permission of the GmSSL Project.
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 * 6. Redistributions of any form whatsoever must retain the following
 *    acknowledgment:
 *    "This product includes software developed by the GmSSL Project
 *    (http://gmssl.org/)"
 *
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 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 * ====================================================================
 */

#ifndef HEADER_SMS4_LCL_H
#define HEADER_SMS4_LCL_H

#include <stdint.h>

# define ROL32(a,n)     (((a)<<(n))|(((a)&0xffffffff)>>(32-(n))))
# define GETU32(p)      ((uint)(p)[0]<<24|(uint)(p)[1]<<16|(uint)(p)[2]<<8|(uint)(p)[3])
# define PUTU32(p,v)    ((p)[0]=(uint8_t)((v)>>24),(p)[1]=(uint8_t)((v)>>16),(p)[2]=(uint8_t)((v)>>8),(p)[3]=(uint8_t)(v))

extern const uint8_t SMS4_S[256];
extern const uint32_t SMS4_T[256];
extern const uint32_t SMS4_D[65536];

#define S32(A)					\
	((SMS4_S[((A) >> 24)       ] << 24) ^	\
	 (SMS4_S[((A) >> 16) & 0xff] << 16) ^	\
	 (SMS4_S[((A) >>  8) & 0xff] <<  8) ^	\
	 (SMS4_S[((A))       & 0xff]))

#define ROUNDS(x0, x1, x2, x3, x4)		\
	ROUND(x0, x1, x2, x3, x4, 0);		\
	ROUND(x1, x2, x3, x4, x0, 1);		\
	ROUND(x2, x3, x4, x0, x1, 2);		\
	ROUND(x3, x4, x0, x1, x2, 3);		\
	ROUND(x4, x0, x1, x2, x3, 4);		\
	ROUND(x0, x1, x2, x3, x4, 5);		\
	ROUND(x1, x2, x3, x4, x0, 6);		\
	ROUND(x2, x3, x4, x0, x1, 7);		\
	ROUND(x3, x4, x0, x1, x2, 8);		\
	ROUND(x4, x0, x1, x2, x3, 9);		\
	ROUND(x0, x1, x2, x3, x4, 10);		\
	ROUND(x1, x2, x3, x4, x0, 11);		\
	ROUND(x2, x3, x4, x0, x1, 12);		\
	ROUND(x3, x4, x0, x1, x2, 13);		\
	ROUND(x4, x0, x1, x2, x3, 14);		\
	ROUND(x0, x1, x2, x3, x4, 15);		\
	ROUND(x1, x2, x3, x4, x0, 16);		\
	ROUND(x2, x3, x4, x0, x1, 17);		\
	ROUND(x3, x4, x0, x1, x2, 18);		\
	ROUND(x4, x0, x1, x2, x3, 19);		\
	ROUND(x0, x1, x2, x3, x4, 20);		\
	ROUND(x1, x2, x3, x4, x0, 21);		\
	ROUND(x2, x3, x4, x0, x1, 22);		\
	ROUND(x3, x4, x0, x1, x2, 23);		\
	ROUND(x4, x0, x1, x2, x3, 24);		\
	ROUND(x0, x1, x2, x3, x4, 25);		\
	ROUND(x1, x2, x3, x4, x0, 26);		\
	ROUND(x2, x3, x4, x0, x1, 27);		\
	ROUND(x3, x4, x0, x1, x2, 28);		\
	ROUND(x4, x0, x1, x2, x3, 29);		\
	ROUND(x0, x1, x2, x3, x4, 30);		\
	ROUND(x1, x2, x3, x4, x0, 31)

#endif
