text: /*
   * Copyright 2016-2018 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_KDF_H
  # define HEADER_KDF_H
  
  # include <openssl/kdferr.h>
  #ifdef __cplusplus
  extern "C" {
  #endif
  
  # define EVP_PKEY_CTRL_TLS_MD                   (EVP_PKEY_ALG_CTRL)
  # define EVP_PKEY_CTRL_TLS_SECRET               (EVP_PKEY_ALG_CTRL + 1)
  # define EVP_PKEY_CTRL_TLS_SEED                 (EVP_PKEY_ALG_CTRL + 2)
  # define EVP_PKEY_CTRL_HKDF_MD                  (EVP_PKEY_ALG_CTRL + 3)
  # define EVP_PKEY_CTRL_HKDF_SALT                (EVP_PKEY_ALG_CTRL + 4)
  # define EVP_PKEY_CTRL_HKDF_KEY                 (EVP_PKEY_ALG_CTRL + 5)
  # define EVP_PKEY_CTRL_HKDF_INFO                (EVP_PKEY_ALG_CTRL + 6)
  # define EVP_PKEY_CTRL_HKDF_MODE                (EVP_PKEY_ALG_CTRL + 7)
  # define EVP_PKEY_CTRL_PASS                     (EVP_PKEY_ALG_CTRL + 8)
  # define EVP_PKEY_CTRL_SCRYPT_SALT              (EVP_PKEY_ALG_CTRL + 9)
  # define EVP_PKEY_CTRL_SCRYPT_N                 (EVP_PKEY_ALG_CTRL + 10)
  # define EVP_PKEY_CTRL_SCRYPT_R                 (EVP_PKEY_ALG_CTRL + 11)
  # define EVP_PKEY_CTRL_SCRYPT_P                 (EVP_PKEY_ALG_CTRL + 12)
  # define EVP_PKEY_CTRL_SCRYPT_MAXMEM_BYTES      (EVP_PKEY_ALG_CTRL + 13)
  
  # define EVP_PKEY_HKDEF_MODE_EXTRACT_AND_EXPAND 0
  # define EVP_PKEY_HKDEF_MODE_EXTRACT_ONLY       1
  # define EVP_PKEY_HKDEF_MODE_EXPAND_ONLY        2
  
  # define EVP_PKEY_CTX_set_tls1_prf_md(pctx, md) \
              VR_EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_DERIVE, \
                                EVP_PKEY_CTRL_TLS_MD, 0, (void *)(md))
  
  # define EVP_PKEY_CTX_set1_tls1_prf_secret(pctx, sec, seclen) \
              VR_EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_DERIVE, \
                                EVP_PKEY_CTRL_TLS_SECRET, seclen, (void *)(sec))
  
  # define EVP_PKEY_CTX_add1_tls1_prf_seed(pctx, seed, seedlen) \
              VR_EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_DERIVE, \
                                EVP_PKEY_CTRL_TLS_SEED, seedlen, (void *)(seed))
  
  # define EVP_PKEY_CTX_set_hkdf_md(pctx, md) \
              VR_EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_DERIVE, \
                                EVP_PKEY_CTRL_HKDF_MD, 0, (void *)(md))
  
  # define EVP_PKEY_CTX_set1_hkdf_salt(pctx, salt, saltlen) \
              VR_EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_DERIVE, \
                                EVP_PKEY_CTRL_HKDF_SALT, saltlen, (void *)(salt))
  
  # define EVP_PKEY_CTX_set1_hkdf_key(pctx, key, keylen) \
              VR_EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_DERIVE, \
                                EVP_PKEY_CTRL_HKDF_KEY, keylen, (void *)(key))
  
  # define EVP_PKEY_CTX_add1_hkdf_info(pctx, info, infolen) \
              VR_EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_DERIVE, \
                                EVP_PKEY_CTRL_HKDF_INFO, infolen, (void *)(info))
  
  # define EVP_PKEY_CTX_hkdf_mode(pctx, mode) \
              VR_EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_DERIVE, \
                                EVP_PKEY_CTRL_HKDF_MODE, mode, NULL)
  
  # define EVP_PKEY_CTX_set1_pbe_pass(pctx, pass, passlen) \
              VR_EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_DERIVE, \
                              EVP_PKEY_CTRL_PASS, passlen, (void *)(pass))
  
  # define EVP_PKEY_CTX_set1_scrypt_salt(pctx, salt, saltlen) \
              VR_EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_DERIVE, \
                              EVP_PKEY_CTRL_SCRYPT_SALT, saltlen, (void *)(salt))
  
  # define EVP_PKEY_CTX_set_scrypt_N(pctx, n) \
              VR_EVP_PKEY_CTX_ctrl_uint64(pctx, -1, EVP_PKEY_OP_DERIVE, \
                              EVP_PKEY_CTRL_SCRYPT_N, n)
  
  # define EVP_PKEY_CTX_set_scrypt_r(pctx, r) \
              VR_EVP_PKEY_CTX_ctrl_uint64(pctx, -1, EVP_PKEY_OP_DERIVE, \
                              EVP_PKEY_CTRL_SCRYPT_R, r)
  
  # define EVP_PKEY_CTX_set_scrypt_p(pctx, p) \
              VR_EVP_PKEY_CTX_ctrl_uint64(pctx, -1, EVP_PKEY_OP_DERIVE, \
                              EVP_PKEY_CTRL_SCRYPT_P, p)
  
  # define EVP_PKEY_CTX_set_scrypt_maxmem_bytes(pctx, maxmem_bytes) \
              VR_EVP_PKEY_CTX_ctrl_uint64(pctx, -1, EVP_PKEY_OP_DERIVE, \
                              EVP_PKEY_CTRL_SCRYPT_MAXMEM_BYTES, maxmem_bytes)
  
  
  # ifdef  __cplusplus
  }
  # endif
  #endif
  