text: /*
   * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved.
   *
   * Licensed under the Apache License 2.0 (the "License").  You may not use
   * this file except in compliance with the License.  You can obtain a copy
   * in the file LICENSE in the source distribution or at
   * https://www.openssl.org/source/license.html
   */
  
  #ifndef HEADER_HMAC_H
  # define HEADER_HMAC_H
  
  # include <openssl/opensslconf.h>
  
  # include <openssl/evp.h>
  
  # if !OPENSSL_API_3
  #  define HMAC_MAX_MD_CBLOCK      128    /* Deprecated */
  # endif
  
  #ifdef  __cplusplus
  extern "C" {
  #endif
  
  size_t HMAC_size(const HMAC_CTX *e);
  HMAC_CTX *HMAC_CTX_new(void);
  int HMAC_CTX_reset(HMAC_CTX *ctx);
  void HMAC_CTX_free(HMAC_CTX *ctx);
  
  DEPRECATEDIN_1_1_0(__owur int HMAC_Init(HMAC_CTX *ctx, const void *key, int len,
                       const EVP_MD *md))
  
  /*__owur*/ int HMAC_Init_ex(HMAC_CTX *ctx, const void *key, int len,
                              const EVP_MD *md, ENGINE *impl);
  /*__owur*/ int HMAC_Update(HMAC_CTX *ctx, const unsigned char *data,
                             size_t len);
  /*__owur*/ int HMAC_Final(HMAC_CTX *ctx, unsigned char *md,
                            unsigned int *len);
  unsigned char *HMAC(const EVP_MD *evp_md, const void *key, int key_len,
                      const unsigned char *d, size_t n, unsigned char *md,
                      unsigned int *md_len);
  __owur int HMAC_CTX_copy(HMAC_CTX *dctx, HMAC_CTX *sctx);
  
  void HMAC_CTX_set_flags(HMAC_CTX *ctx, unsigned long flags);
  const EVP_MD *HMAC_CTX_get_md(const HMAC_CTX *ctx);
  
  #ifdef  __cplusplus
  }
  #endif
  
  #endif
  