text: /*
   * Copyright 2016-2020 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 OPENSSL_KDF_H
  # define OPENSSL_KDF_H
  # pragma once
  
  # include <openssl/macros.h>
  # ifndef OPENSSL_NO_DEPRECATED_3_0
  #  define HEADER_KDF_H
  # endif
  
  # include <stdarg.h>
  # include <stddef.h>
  # include <openssl/types.h>
  # include <openssl/core.h>
  
  # ifdef __cplusplus
  extern "C" {
  # endif
  
  int EVP_KDF_up_ref(EVP_KDF *kdf);
  void EVP_KDF_free(EVP_KDF *kdf);
  EVP_KDF *EVP_KDF_fetch(OPENSSL_CTX *libctx, const char *algorithm,
                         const char *properties);
  
  EVP_KDF_CTX *EVP_KDF_CTX_new(EVP_KDF *kdf);
  void EVP_KDF_CTX_free(EVP_KDF_CTX *ctx);
  EVP_KDF_CTX *EVP_KDF_CTX_dup(const EVP_KDF_CTX *src);
  int EVP_KDF_number(const EVP_KDF *kdf);
  int EVP_KDF_is_a(const EVP_KDF *kdf, const char *name);
  const OSSL_PROVIDER *EVP_KDF_provider(const EVP_KDF *kdf);
  const EVP_KDF *EVP_KDF_CTX_kdf(EVP_KDF_CTX *ctx);
  
  void EVP_KDF_reset(EVP_KDF_CTX *ctx);
  size_t EVP_KDF_size(EVP_KDF_CTX *ctx);
  int EVP_KDF_derive(EVP_KDF_CTX *ctx, unsigned char *key, size_t keylen);
  int EVP_KDF_get_params(EVP_KDF *kdf, OSSL_PARAM params[]);
  int EVP_KDF_CTX_get_params(EVP_KDF_CTX *ctx, OSSL_PARAM params[]);
  int EVP_KDF_CTX_set_params(EVP_KDF_CTX *ctx, const OSSL_PARAM params[]);
  const OSSL_PARAM *EVP_KDF_gettable_params(const EVP_KDF *kdf);
  const OSSL_PARAM *EVP_KDF_gettable_ctx_params(const EVP_KDF *kdf);
  const OSSL_PARAM *EVP_KDF_settable_ctx_params(const EVP_KDF *kdf);
  
  void EVP_KDF_do_all_provided(OPENSSL_CTX *libctx,
                               void (*fn)(EVP_KDF *kdf, void *arg),
                               void *arg);
  void EVP_KDF_names_do_all(const EVP_KDF *kdf,
                            void (*fn)(const char *name, void *data),
                            void *data);
  
  # define EVP_KDF_CTRL_SET_PASS               0x01 /* unsigned char *, size_t */
  # define EVP_KDF_CTRL_SET_SALT               0x02 /* unsigned char *, size_t */
  # define EVP_KDF_CTRL_SET_ITER               0x03 /* int */
  # define EVP_KDF_CTRL_SET_MD                 0x04 /* EVP_MD * */
  # define EVP_KDF_CTRL_SET_KEY                0x05 /* unsigned char *, size_t */
  # define EVP_KDF_CTRL_SET_MAXMEM_BYTES       0x06 /* uint64_t */
  # define EVP_KDF_CTRL_SET_TLS_SECRET         0x07 /* unsigned char *, size_t */
  # define EVP_KDF_CTRL_ADD_TLS_SEED           0x08 /* unsigned char *, size_t */
  # define EVP_KDF_CTRL_RESET_HKDF_INFO        0x09
  # define EVP_KDF_CTRL_ADD_HKDF_INFO          0x0a /* unsigned char *, size_t */
  # define EVP_KDF_CTRL_SET_HKDF_MODE          0x0b /* int */
  # define EVP_KDF_CTRL_SET_SCRYPT_N           0x0c /* uint64_t */
  # define EVP_KDF_CTRL_SET_SCRYPT_R           0x0d /* uint32_t */
  # define EVP_KDF_CTRL_SET_SCRYPT_P           0x0e /* uint32_t */
  # define EVP_KDF_CTRL_SET_SSHKDF_XCGHASH     0x0f /* unsigned char *, size_t */
  # define EVP_KDF_CTRL_SET_SSHKDF_SESSION_ID  0x10 /* unsigned char *, size_t */
  # define EVP_KDF_CTRL_SET_SSHKDF_TYPE        0x11 /* int */
  # define EVP_KDF_CTRL_SET_MAC                0x12 /* EVP_MAC * */
  # define EVP_KDF_CTRL_SET_MAC_SIZE           0x13 /* size_t */
  # define EVP_KDF_CTRL_SET_SSKDF_INFO         0x14 /* unsigned char *, size_t */
  # define EVP_KDF_CTRL_SET_PBKDF2_PKCS5_MODE  0x15 /* int */
  # define EVP_KDF_CTRL_SET_UKM                0x16 /* unsigned char *, size_t */
  # define EVP_KDF_CTRL_SET_CEK_ALG            0x17 /* char * */
  # define EVP_KDF_CTRL_SET_SHARED_INFO        EVP_KDF_CTRL_SET_SSKDF_INFO
  
  # define EVP_KDF_HKDF_MODE_EXTRACT_AND_EXPAND  0
  # define EVP_KDF_HKDF_MODE_EXTRACT_ONLY        1
  # define EVP_KDF_HKDF_MODE_EXPAND_ONLY         2
  
  #define EVP_KDF_SSHKDF_TYPE_INITIAL_IV_CLI_TO_SRV     65
  #define EVP_KDF_SSHKDF_TYPE_INITIAL_IV_SRV_TO_CLI     66
  #define EVP_KDF_SSHKDF_TYPE_ENCRYPTION_KEY_CLI_TO_SRV 67
  #define EVP_KDF_SSHKDF_TYPE_ENCRYPTION_KEY_SRV_TO_CLI 68
  #define EVP_KDF_SSHKDF_TYPE_INTEGRITY_KEY_CLI_TO_SRV  69
  #define EVP_KDF_SSHKDF_TYPE_INTEGRITY_KEY_SRV_TO_CLI  70
  
  /**** The legacy PKEY-based KDF API follows. ****/
  
  # 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 \
              EVP_KDF_HKDF_MODE_EXTRACT_AND_EXPAND
  # define EVP_PKEY_HKDEF_MODE_EXTRACT_ONLY       \
              EVP_KDF_HKDF_MODE_EXTRACT_ONLY
  # define EVP_PKEY_HKDEF_MODE_EXPAND_ONLY        \
              EVP_KDF_HKDF_MODE_EXPAND_ONLY
  
  int EVP_PKEY_CTX_set_tls1_prf_md(EVP_PKEY_CTX *ctx, const EVP_MD *md);
  
  int EVP_PKEY_CTX_set1_tls1_prf_secret(EVP_PKEY_CTX *pctx,
                                        const unsigned char *sec, int seclen);
  
  int EVP_PKEY_CTX_add1_tls1_prf_seed(EVP_PKEY_CTX *pctx,
                                      const unsigned char *seed, int seedlen);
  
  int EVP_PKEY_CTX_set_hkdf_md(EVP_PKEY_CTX *ctx, const EVP_MD *md);
  
  int EVP_PKEY_CTX_set1_hkdf_salt(EVP_PKEY_CTX *ctx,
                                  const unsigned char *salt, int saltlen);
  
  int EVP_PKEY_CTX_set1_hkdf_key(EVP_PKEY_CTX *ctx,
                                 const unsigned char *key, int keylen);
  
  int EVP_PKEY_CTX_add1_hkdf_info(EVP_PKEY_CTX *ctx,
                                  const unsigned char *info, int infolen);
  
  int EVP_PKEY_CTX_hkdf_mode(EVP_PKEY_CTX *ctx, int mode);
  
  int EVP_PKEY_CTX_set1_pbe_pass(EVP_PKEY_CTX *ctx, const char *pass,
                                 int passlen);
  
  int EVP_PKEY_CTX_set1_scrypt_salt(EVP_PKEY_CTX *ctx,
                                    const unsigned char *salt, int saltlen);
  
  int EVP_PKEY_CTX_set_scrypt_N(EVP_PKEY_CTX *ctx, uint64_t n);
  
  int EVP_PKEY_CTX_set_scrypt_r(EVP_PKEY_CTX *ctx, uint64_t r);
  
  int EVP_PKEY_CTX_set_scrypt_p(EVP_PKEY_CTX *ctx, uint64_t p);
  
  int EVP_PKEY_CTX_set_scrypt_maxmem_bytes(EVP_PKEY_CTX *ctx,
                                           uint64_t maxmem_bytes);
  
  
  # ifdef __cplusplus
  }
  # endif
  #endif
  