crypto/evp/m_null.c

   1 /*
   2  * Copyright 1995-2016 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 "internal/evp_int.h"
  16
  17 static int init(EVP_MD_CTX *ctx)
  18 {
  19     return 1;
  20 }
  21
  22 static int update(EVP_MD_CTX *ctx, const void *data, size_t count)
  23 {
  24     return 1;
  25 }
  26
  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     init,
  38     update,
  39     final,
  40     NULL,
  41     NULL,
  42     0,
  43     sizeof(EVP_MD *),
  44 };
  45
  46 const EVP_MD *EVP_md_null(void)
  47 {
  48     return &null_md;
  49 }