FF 구성 모듈

Transform() 함수에서 사용되는 FF() 매크로 함수에는 다양한 내부 매크로 함수들이 존재한다.

그래서 FF() 함수를 구성하는 함수들을 모두 모듈로 만들었다.

 

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우선 c코드로 FF()함수와 이를 구성하는 함수들을 살펴보면 다음과 같다.

#define FF(a, b, c, d, e, f, g, h, j) {					\
	T1 = h + Sigma1(e) + Ch(e, f, g) + SHA256_K[j] + X[j];		\
	d += T1;							\
	h = T1 + Sigma0(a) + Maj(a, b, c);				\
}

 

#if defined(_MSC_VER)
	#define ROTL_ULONG(x, n) _lrotl((x), (n)) // rotate left
	#define ROTR_ULONG(x, n) _lrotr((x), (n)) // rotate right
#else
	#define ROTL_ULONG(x, n) ((ULONG)((x) << (n)) | (ULONG)((x) >> (32 - (n))))
	#define ROTR_ULONG(x, n) ((ULONG)((x) >> (n)) | (ULONG)((x) << (32 - (n))))
#endif

////////////////////////////////////////////////////////////////////////////////

#define RR(x, n)		ROTR_ULONG(x, n)
#define SS(x, n)		(x >> n)

#define Ch(x, y, z)		((x & y) ^ ((~x) & z))
#define Maj(x, y, z)		((x & y) ^ (x & z) ^ (y & z))
#define Sigma0(x)		(RR(x,  2) ^ RR(x, 13) ^ RR(x, 22))
#define Sigma1(x)		(RR(x,  6) ^ RR(x, 11) ^ RR(x, 25))

#define RHO0(x)			(RR(x,  7) ^ RR(x, 18) ^ SS(x,  3))
#define RHO1(x)			(RR(x, 17) ^ RR(x, 19) ^ SS(x, 10))

 

* RTL

// rotate right
module calc_RR(
	input 	wire 	[31:0] 	i_x,
	input 	wire 	[4:0]	i_n,
	output 	wire 	[31:0] 	o_calc_x
);

	//assign calc_x = (i_x>>i_n) | (i_x<<(64-i_n)); // 64bit
	assign o_calc_x = (i_x>>i_n) | (i_x<<(32-i_n));

endmodule

module calc_SS(
	input 	wire 	[31:0] 	i_x,
	input 	wire 	[4:0]	i_n,
	output 	wire 	[31:0] 	o_calc_x
);

	assign o_calc_x = i_x>>i_n;

endmodule

/////////////////////////////////////////////////////////////////////

module ch(
	input 	wire 	[31:0] 	i_x,
	input 	wire 	[31:0] 	i_y,
	input 	wire 	[31:0] 	i_z,
	output 	wire 	[31:0] 	o_data
);

	assign o_data = (i_x & i_y) ^ ((~i_x) & i_z);

endmodule

module maj(
	input 	wire 	[31:0] 	i_x,
	input 	wire 	[31:0] 	i_y,
	input 	wire 	[31:0] 	i_z,
	output 	wire 	[31:0] 	o_data
);

	assign o_data = (i_x & i_y) ^ (i_x & i_z) ^ (i_y & i_z);

endmodule

/////////////////////////////////////////////////////////////////////

module sigma0(
	input 	wire 	[31:0] 	i_x,
	output 	wire 	[31:0] 	o_x
);
	
	wire 	[4:0] 	n0;
	wire 	[4:0] 	n1;
	wire 	[4:0] 	n2;

	wire 	[31:0] calc_x0;
	wire 	[31:0] calc_x1;
	wire 	[31:0] calc_x2;

	assign n0 = 'd2;
	assign n1 = 'd13;
	assign n2 = 'd22;


	calc_RR U0_RR	(
		.i_x			(	i_x		),
		.i_n			(	n0		),
		.o_calc_x		(	calc_x0	)
	);

	calc_RR U1_RR	(
		.i_x			(	i_x		),
		.i_n			(	n1		),
		.o_calc_x		(	calc_x1	)
	);

	calc_RR U2_RR	(
		.i_x			(	i_x		),
		.i_n			(	n2		),
		.o_calc_x		(	calc_x2	)
	);

	assign o_x = calc_x0^calc_x1^calc_x2; // XOR

endmodule

module sigma1(
	input 	wire 	[31:0] 	i_x,
	output wire 	[31:0] 	o_x
);
	
	wire 	[4:0] 	n0;
	wire 	[4:0] 	n1;
	wire 	[4:0] 	n2;

	wire 	[31:0] calc_x0;
	wire 	[31:0] calc_x1;
	wire 	[31:0] calc_x2;

	assign n0 = 'd6;
	assign n1 = 'd11;
	assign n2 = 'd25;


	calc_RR U0_RR	(
		.i_x			(	i_x		),
		.i_n			(	n0		),
		.o_calc_x		(	calc_x0	)
	);

	calc_RR U1_RR	(
		.i_x			(	i_x		),
		.i_n			(	n1		),
		.o_calc_x		(	calc_x1	)
	);

	calc_RR U2_RR	(
		.i_x	(	i_x		),
		.i_n	(	n2		),
		.o_calc_x	(	calc_x2		)
	);

	assign o_x = calc_x0^calc_x1^calc_x2; // XOR

endmodule

/////////////////////////////////////////////////////////////////////

module calc_RHO0(
	input 	wire 	[31:0] 	i_x,
	output wire 	[31:0] 	o_x
);
	
	wire 	[4:0] 	n0;
	wire 	[4:0] 	n1;
	wire 	[4:0] 	n2;

	wire 	[31:0] calc_x0;
	wire 	[31:0] calc_x1;
	wire 	[31:0] calc_x2;

	assign n0 = 'd7;
	assign n1 = 'd18;
	assign n2 = 'd3;


	calc_RR U0_RR	(
		.i_x			(	i_x		),
		.i_n			(	n0		),
		.o_calc_x		(	calc_x0	)
	);

	calc_RR U1_RR	(
		.i_x			(	i_x		),
		.i_n			(	n1		),
		.o_calc_x		(	calc_x1	)
	);

	calc_SS U0_SS	(
		.i_x		(	x		),
		.i_n		(	n2		),
		.o_calc_x	(	calc_x2		)
	);

	assign o_x = calc_x0^calc_x1^calc_x2; // XOR

endmodule

module calc_RHO1(
	input 	wire 	[31:0] 	i_x,
	output wire 	[31:0] 	o_x
);
	
	wire 	[4:0] 	n0;
	wire 	[4:0] 	n1;
	wire 	[4:0] 	n2;

	wire 	[31:0] calc_x0;
	wire 	[31:0] calc_x1;
	wire 	[31:0] calc_x2;

	assign n0 = 'd17;
	assign n1 = 'd19;
	assign n2 = 'd10;

	calc_RR U0_RR	(
		.i_x			(	i_x		),
		.i_n			(	n0		),
		.o_calc_x		(	calc_x0	)
	);

	calc_RR U1_RR	(
		.i_x			(	i_x		),
		.i_n			(	n1		),
		.o_calc_x		(	calc_x1	)
	);

	calc_SS U0_SS	(
		.i_x		(	x		),
		.i_n		(	n2		),
		.o_calc_x	(	calc_x2		)
	);

	assign o_x = calc_x0^calc_x1^calc_x2; // XOR

endmodule

 

 

 

 

 

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- 참고 -

https://seed.kisa.or.kr/kisa/Board/21/detailView.do