/* ====================================================================
 * Copyright (c) 2014 - 2017 The GmSSL Project.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * 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.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 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/)"
 *
 * 4. The name "GmSSL Project" must not be used to endorse or promote
 *    products derived from this software without prior written
 *    permission. For written permission, please contact
 *    guanzhi1980@gmail.com.
 *
 * 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
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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 * ====================================================================
 */

#ifndef SM3_H
#define SM3_H

#include <string.h>
#include <stdio.h>
#include <time.h>

#define SM3_DIGEST_LENGTH	32
#define SM3_BLOCK_SIZE		64
#define SM3_CBLOCK		(SM3_BLOCK_SIZE)
#define SM3_HMAC_SIZE		(SM3_DIGEST_LENGTH)

# define ROL32(a,n)     (((a)<<(n))|(((a)&0xffffffff)>>(32-(n))))
# define GETU32(p)      ((uint32_t)(p)[0]<<24|(uint32_t)(p)[1]<<16|(uint32_t)(p)[2]<<8|(uint32_t)(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))

#define FAR

typedef struct {
    uint32_t digest[8];
    uint64_t nblocks;
    unsigned char block[64];
    int num;
} sm3_ctx_t;

typedef struct {
    sm3_ctx_t sm3_ctx;
    unsigned char key[SM3_BLOCK_SIZE];
} sm3_hmac_ctx_t;

void sm3_init(sm3_ctx_t *ctx);
void sm3_update(sm3_ctx_t *ctx, const unsigned char* data, size_t data_len);
void sm3_final(sm3_ctx_t *ctx, unsigned char digest[SM3_DIGEST_LENGTH]);
void sm3_compress(uint32_t digest[8], const unsigned char block[SM3_BLOCK_SIZE]);
void sm3(const unsigned char *data, size_t datalen, unsigned char digest[SM3_DIGEST_LENGTH]);
int sm3_file(char *path, unsigned char output[32]);
void sm3_compute_id_digest(unsigned char z[32], const char *id, const unsigned char x[32], const unsigned char y[32]);
void sm3_hmac_init(sm3_hmac_ctx_t *ctx, const unsigned char *key, size_t key_len);
void sm3_hmac_update(sm3_hmac_ctx_t *ctx, const unsigned char *data, size_t data_len);
void sm3_hmac_final(sm3_hmac_ctx_t *ctx, unsigned char mac[SM3_HMAC_SIZE]);
void sm3_hmac(const unsigned char *data, size_t data_len, const unsigned char *key, size_t key_len, unsigned char mac[SM3_HMAC_SIZE]);

void sm3_test_case();

#endif