1/*
2 * Copyright 1995-2021 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the Apache License 2.0 (the "License").  You may not use
5 * this file except in compliance with the License.  You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
8 */
9
10#include <stdio.h>
11#include "internal/cryptlib.h"
12#include <openssl/evp.h>
13#include <openssl/objects.h>
14#include <openssl/x509.h>
15#include "crypto/evp.h"
16
17static int init(EVP_MD_CTX *ctx)
18{
19    return 1;
20}
21
22static int update(EVP_MD_CTX *ctx, const void *data, size_t count)
23{
24    return 1;
25}
26
27static int final(EVP_MD_CTX *ctx, unsigned char *md)
28{
29    return 1;
30}
31
32static const EVP_MD null_md = {
33    NID_undef,
34    NID_undef,
35    0,
36    0,
37    EVP_ORIG_GLOBAL,
38    init,
39    update,
40    final,
41    NULL,
42    NULL,
43    0,
44    sizeof(EVP_MD *),
45};
46
47const EVP_MD *EVP_md_null(void)
48{
49    return &null_md;
50}
51