/*	$OpenBSD: sm3.c,v 1.1 2018/11/11 06:53:31 tb Exp $	*/
/*
 * Copyright (c) 2018, Ribose Inc
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#ifndef OPENSSL_NO_SM3

#include <openssl/sm3.h>

#include "sm3_locl.h"

int
SM3_Init(SM3_CTX *c)
{
	memset(c, 0, sizeof(*c));
	c->A = SM3_A;
	c->B = SM3_B;
	c->C = SM3_C;
	c->D = SM3_D;
	c->E = SM3_E;
	c->F = SM3_F;
	c->G = SM3_G;
	c->H = SM3_H;
	return 1;
}

void
SM3_block_data_order(SM3_CTX *ctx, const void *p, size_t num)
{
	const unsigned char *data = p;
	SM3_WORD A, B, C, D, E, F, G, H;
	SM3_WORD W00, W01, W02, W03, W04, W05, W06, W07;
	SM3_WORD W08, W09, W10, W11, W12, W13, W14, W15;

	while (num-- != 0) {
		A = ctx->A;
		B = ctx->B;
		C = ctx->C;
		D = ctx->D;
		E = ctx->E;
		F = ctx->F;
		G = ctx->G;
		H = ctx->H;

        	/*
        	 * We have to load all message bytes immediately since SM3 reads
        	 * them slightly out of order.
        	 */
		HOST_c2l(data, W00);
		HOST_c2l(data, W01);
		HOST_c2l(data, W02);
		HOST_c2l(data, W03);
		HOST_c2l(data, W04);
		HOST_c2l(data, W05);
		HOST_c2l(data, W06);
		HOST_c2l(data, W07);
		HOST_c2l(data, W08);
		HOST_c2l(data, W09);
		HOST_c2l(data, W10);
		HOST_c2l(data, W11);
		HOST_c2l(data, W12);
		HOST_c2l(data, W13);
		HOST_c2l(data, W14);
		HOST_c2l(data, W15);

		R1(A, B, C, D, E, F, G, H, 0x79cc4519, W00, W00 ^ W04);
		W00 = EXPAND(W00, W07, W13, W03, W10);
		R1(D, A, B, C, H, E, F, G, 0xf3988a32, W01, W01 ^ W05);
		W01 = EXPAND(W01, W08, W14, W04, W11);
		R1(C, D, A, B, G, H, E, F, 0xe7311465, W02, W02 ^ W06);
		W02 = EXPAND(W02, W09, W15, W05, W12);
		R1(B, C, D, A, F, G, H, E, 0xce6228cb, W03, W03 ^ W07);
		W03 = EXPAND(W03, W10, W00, W06, W13);
		R1(A, B, C, D, E, F, G, H, 0x9cc45197, W04, W04 ^ W08);
		W04 = EXPAND(W04, W11, W01, W07, W14);
		R1(D, A, B, C, H, E, F, G, 0x3988a32f, W05, W05 ^ W09);
		W05 = EXPAND(W05, W12, W02, W08, W15);
		R1(C, D, A, B, G, H, E, F, 0x7311465e, W06, W06 ^ W10);
		W06 = EXPAND(W06, W13, W03, W09, W00);
		R1(B, C, D, A, F, G, H, E, 0xe6228cbc, W07, W07 ^ W11);
		W07 = EXPAND(W07, W14, W04, W10, W01);
		R1(A, B, C, D, E, F, G, H, 0xcc451979, W08, W08 ^ W12);
		W08 = EXPAND(W08, W15, W05, W11, W02);
		R1(D, A, B, C, H, E, F, G, 0x988a32f3, W09, W09 ^ W13);
		W09 = EXPAND(W09, W00, W06, W12, W03);
		R1(C, D, A, B, G, H, E, F, 0x311465e7, W10, W10 ^ W14);
		W10 = EXPAND(W10, W01, W07, W13, W04);
		R1(B, C, D, A, F, G, H, E, 0x6228cbce, W11, W11 ^ W15);
		W11 = EXPAND(W11, W02, W08, W14, W05);
		R1(A, B, C, D, E, F, G, H, 0xc451979c, W12, W12 ^ W00);
		W12 = EXPAND(W12, W03, W09, W15, W06);
		R1(D, A, B, C, H, E, F, G, 0x88a32f39, W13, W13 ^ W01);
		W13 = EXPAND(W13, W04, W10, W00, W07);
		R1(C, D, A, B, G, H, E, F, 0x11465e73, W14, W14 ^ W02);
		W14 = EXPAND(W14, W05, W11, W01, W08);
		R1(B, C, D, A, F, G, H, E, 0x228cbce6, W15, W15 ^ W03);
		W15 = EXPAND(W15, W06, W12, W02, W09);
		R2(A, B, C, D, E, F, G, H, 0x9d8a7a87, W00, W00 ^ W04);
		W00 = EXPAND(W00, W07, W13, W03, W10);
		R2(D, A, B, C, H, E, F, G, 0x3b14f50f, W01, W01 ^ W05);
		W01 = EXPAND(W01, W08, W14, W04, W11);
		R2(C, D, A, B, G, H, E, F, 0x7629ea1e, W02, W02 ^ W06);
		W02 = EXPAND(W02, W09, W15, W05, W12);
		R2(B, C, D, A, F, G, H, E, 0xec53d43c, W03, W03 ^ W07);
		W03 = EXPAND(W03, W10, W00, W06, W13);
		R2(A, B, C, D, E, F, G, H, 0xd8a7a879, W04, W04 ^ W08);
		W04 = EXPAND(W04, W11, W01, W07, W14);
		R2(D, A, B, C, H, E, F, G, 0xb14f50f3, W05, W05 ^ W09);
		W05 = EXPAND(W05, W12, W02, W08, W15);
		R2(C, D, A, B, G, H, E, F, 0x629ea1e7, W06, W06 ^ W10);
		W06 = EXPAND(W06, W13, W03, W09, W00);
		R2(B, C, D, A, F, G, H, E, 0xc53d43ce, W07, W07 ^ W11);
		W07 = EXPAND(W07, W14, W04, W10, W01);
		R2(A, B, C, D, E, F, G, H, 0x8a7a879d, W08, W08 ^ W12);
		W08 = EXPAND(W08, W15, W05, W11, W02);
		R2(D, A, B, C, H, E, F, G, 0x14f50f3b, W09, W09 ^ W13);
		W09 = EXPAND(W09, W00, W06, W12, W03);
		R2(C, D, A, B, G, H, E, F, 0x29ea1e76, W10, W10 ^ W14);
		W10 = EXPAND(W10, W01, W07, W13, W04);
		R2(B, C, D, A, F, G, H, E, 0x53d43cec, W11, W11 ^ W15);
		W11 = EXPAND(W11, W02, W08, W14, W05);
		R2(A, B, C, D, E, F, G, H, 0xa7a879d8, W12, W12 ^ W00);
		W12 = EXPAND(W12, W03, W09, W15, W06);
		R2(D, A, B, C, H, E, F, G, 0x4f50f3b1, W13, W13 ^ W01);
		W13 = EXPAND(W13, W04, W10, W00, W07);
		R2(C, D, A, B, G, H, E, F, 0x9ea1e762, W14, W14 ^ W02);
		W14 = EXPAND(W14, W05, W11, W01, W08);
		R2(B, C, D, A, F, G, H, E, 0x3d43cec5, W15, W15 ^ W03);
		W15 = EXPAND(W15, W06, W12, W02, W09);
		R2(A, B, C, D, E, F, G, H, 0x7a879d8a, W00, W00 ^ W04);
		W00 = EXPAND(W00, W07, W13, W03, W10);
		R2(D, A, B, C, H, E, F, G, 0xf50f3b14, W01, W01 ^ W05);
		W01 = EXPAND(W01, W08, W14, W04, W11);
		R2(C, D, A, B, G, H, E, F, 0xea1e7629, W02, W02 ^ W06);
		W02 = EXPAND(W02, W09, W15, W05, W12);
		R2(B, C, D, A, F, G, H, E, 0xd43cec53, W03, W03 ^ W07);
		W03 = EXPAND(W03, W10, W00, W06, W13);
		R2(A, B, C, D, E, F, G, H, 0xa879d8a7, W04, W04 ^ W08);
		W04 = EXPAND(W04, W11, W01, W07, W14);
		R2(D, A, B, C, H, E, F, G, 0x50f3b14f, W05, W05 ^ W09);
		W05 = EXPAND(W05, W12, W02, W08, W15);
		R2(C, D, A, B, G, H, E, F, 0xa1e7629e, W06, W06 ^ W10);
		W06 = EXPAND(W06, W13, W03, W09, W00);
		R2(B, C, D, A, F, G, H, E, 0x43cec53d, W07, W07 ^ W11);
		W07 = EXPAND(W07, W14, W04, W10, W01);
		R2(A, B, C, D, E, F, G, H, 0x879d8a7a, W08, W08 ^ W12);
		W08 = EXPAND(W08, W15, W05, W11, W02);
		R2(D, A, B, C, H, E, F, G, 0x0f3b14f5, W09, W09 ^ W13);
		W09 = EXPAND(W09, W00, W06, W12, W03);
		R2(C, D, A, B, G, H, E, F, 0x1e7629ea, W10, W10 ^ W14);
		W10 = EXPAND(W10, W01, W07, W13, W04);
		R2(B, C, D, A, F, G, H, E, 0x3cec53d4, W11, W11 ^ W15);
		W11 = EXPAND(W11, W02, W08, W14, W05);
		R2(A, B, C, D, E, F, G, H, 0x79d8a7a8, W12, W12 ^ W00);
		W12 = EXPAND(W12, W03, W09, W15, W06);
		R2(D, A, B, C, H, E, F, G, 0xf3b14f50, W13, W13 ^ W01);
		W13 = EXPAND(W13, W04, W10, W00, W07);
		R2(C, D, A, B, G, H, E, F, 0xe7629ea1, W14, W14 ^ W02);
		W14 = EXPAND(W14, W05, W11, W01, W08);
		R2(B, C, D, A, F, G, H, E, 0xcec53d43, W15, W15 ^ W03);
		W15 = EXPAND(W15, W06, W12, W02, W09);
		R2(A, B, C, D, E, F, G, H, 0x9d8a7a87, W00, W00 ^ W04);
		W00 = EXPAND(W00, W07, W13, W03, W10);
		R2(D, A, B, C, H, E, F, G, 0x3b14f50f, W01, W01 ^ W05);
		W01 = EXPAND(W01, W08, W14, W04, W11);
		R2(C, D, A, B, G, H, E, F, 0x7629ea1e, W02, W02 ^ W06);
		W02 = EXPAND(W02, W09, W15, W05, W12);
		R2(B, C, D, A, F, G, H, E, 0xec53d43c, W03, W03 ^ W07);
		W03 = EXPAND(W03, W10, W00, W06, W13);
		R2(A, B, C, D, E, F, G, H, 0xd8a7a879, W04, W04 ^ W08);
		R2(D, A, B, C, H, E, F, G, 0xb14f50f3, W05, W05 ^ W09);
		R2(C, D, A, B, G, H, E, F, 0x629ea1e7, W06, W06 ^ W10);
		R2(B, C, D, A, F, G, H, E, 0xc53d43ce, W07, W07 ^ W11);
		R2(A, B, C, D, E, F, G, H, 0x8a7a879d, W08, W08 ^ W12);
		R2(D, A, B, C, H, E, F, G, 0x14f50f3b, W09, W09 ^ W13);
		R2(C, D, A, B, G, H, E, F, 0x29ea1e76, W10, W10 ^ W14);
		R2(B, C, D, A, F, G, H, E, 0x53d43cec, W11, W11 ^ W15);
		R2(A, B, C, D, E, F, G, H, 0xa7a879d8, W12, W12 ^ W00);
		R2(D, A, B, C, H, E, F, G, 0x4f50f3b1, W13, W13 ^ W01);
		R2(C, D, A, B, G, H, E, F, 0x9ea1e762, W14, W14 ^ W02);
		R2(B, C, D, A, F, G, H, E, 0x3d43cec5, W15, W15 ^ W03);

		ctx->A ^= A;
		ctx->B ^= B;
		ctx->C ^= C;
		ctx->D ^= D;
		ctx->E ^= E;
		ctx->F ^= F;
		ctx->G ^= G;
		ctx->H ^= H;
	}
}

#endif /* !OPENSSL_NO_SM3 */