/*      $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 */