/*
 * Copyright 2017-2021 The OpenSSL Project Authors. All Rights Reserved.
 * Copyright 2017 Ribose Inc. All Rights Reserved.
 *
 * Licensed under the Apache License 2.0 (the "License").  You may not use
 * this file except in compliance with the License.  You can obtain a copy
 * in the file LICENSE in the source distribution or at
 * https://www.openssl.org/source/license.html
 */

/* This header can move into provider when legacy support is removed */
#ifndef OSSL_INTERNAL_SM3_H
#define OSSL_INTERNAL_SM3_H
#pragma once

#include <openssl/opensslconf.h>

#ifdef OPENSSL_NO_SM3
#error SM3 is disabled.
#endif

#define SM3_DIGEST_LENGTH 32
#define SM3_WORD unsigned int

#define SM3_CBLOCK 64
#define SM3_LBLOCK (SM3_CBLOCK / 4)

typedef struct SM3state_st {
    SM3_WORD A, B, C, D, E, F, G, H;
    SM3_WORD Nl, Nh;
    SM3_WORD data[SM3_LBLOCK];
    unsigned int num;
} SM3_CTX;

int ossl_sm3_init(SM3_CTX *c);
int ossl_sm3_update(SM3_CTX *c, const void *data, size_t len);
int ossl_sm3_final(unsigned char *md, SM3_CTX *c);

#endif /* OSSL_INTERNAL_SM3_H */