m_sm3.c

/* ====================================================================
 * Copyright (c) 2014 - 2016 The GmSSL Project.  All rights reserved.
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 */

#include <stdio.h>
#include "internal/cryptlib.h"

#ifndef OPENSSL_NO_SM3
# include <openssl/evp.h>
# include <openssl/x509.h>
# include <openssl/objects.h>
# include <openssl/sm3.h>
# include "internal/evp_int.h"

static int init(EVP_MD_CTX *ctx)
{
	if (!ctx || !EVP_MD_CTX_md_data(ctx)) {
		return 0;
	}
	sm3_init(EVP_MD_CTX_md_data(ctx));
	return 1;
}

static int update(EVP_MD_CTX *ctx, const void *in, size_t inlen)
{
	if (!ctx || !EVP_MD_CTX_md_data(ctx) || (!in && inlen != 0)) {
		return 0;
	}
	sm3_update(EVP_MD_CTX_md_data(ctx), in, inlen);
	return 1;
}

static int final(EVP_MD_CTX *ctx, unsigned char *md)
{
	if (!ctx || !EVP_MD_CTX_md_data(ctx) || !md) {
		return 0;
	}
	sm3_final(EVP_MD_CTX_md_data(ctx), md);
	return 1;
}

static const EVP_MD sm3_md = {
	NID_sm3,		/* type */
	NID_sm2sign_with_sm3,	/* pkey_type */
	SM3_DIGEST_LENGTH,	/* md_size */
	0,			/* flags */
	init,			/* init */
	update,			/* update */
	final,			/* final */
	NULL,			/* copy */
	NULL,			/* cleanup */
	SM3_BLOCK_SIZE,		/* block_size */
	sizeof(EVP_MD *) + sizeof(sm3_ctx_t), /* ctx_size */
	NULL,			/* md_ctrl */
};

const EVP_MD *EVP_sm3(void)
{
        return &sm3_md;
}
#endif /* OPENSSL_NO_SM3 */