crypto/hmac/hmac_lcl.h

   1 /*
   2  * Copyright 1995-2018 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 #ifndef HEADER_HMAC_LCL_H
  11 # define HEADER_HMAC_LCL_H
  12
  13 /* The current largest case is for SHA3-224 */
  14 #define HMAC_MAX_MD_CBLOCK_SIZE     144
  15
  16 struct hmac_ctx_st {
  17     const EVP_MD *md;
  18     EVP_MD_CTX *md_ctx;
  19     EVP_MD_CTX *i_ctx;
  20     EVP_MD_CTX *o_ctx;
  21     unsigned int key_length;
  22     unsigned char key[HMAC_MAX_MD_CBLOCK_SIZE];
  23 };
  24
  25 #endif