xref: /openssl/crypto/evp/m_null.c (revision f5afac4b)
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 
init(EVP_MD_CTX * ctx)17 static int init(EVP_MD_CTX *ctx)
18 {
19     return 1;
20 }
21 
update(EVP_MD_CTX * ctx,const void * data,size_t count)22 static int update(EVP_MD_CTX *ctx, const void *data, size_t count)
23 {
24     return 1;
25 }
26 
final(EVP_MD_CTX * ctx,unsigned char * md)27 static int final(EVP_MD_CTX *ctx, unsigned char *md)
28 {
29     return 1;
30 }
31 
32 static 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 
EVP_md_null(void)47 const EVP_MD *EVP_md_null(void)
48 {
49     return &null_md;
50 }
51