text: /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
   * project 1999.
   */
  /* ====================================================================
   * Copyright (c) 1999 The OpenSSL Project.  All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   *
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   *
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in
   *    the documentation and/or other materials provided with the
   *    distribution.
   *
   * 3. All advertising materials mentioning features or use of this
   *    software must display the following acknowledgment:
   *    "This product includes software developed by the OpenSSL Project
   *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
   *
   * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
   *    endorse or promote products derived from this software without
   *    prior written permission. For written permission, please contact
   *    licensing@OpenSSL.org.
   *
   * 5. Products derived from this software may not be called "OpenSSL"
   *    nor may "OpenSSL" appear in their names without prior written
   *    permission of the OpenSSL Project.
   *
   * 6. Redistributions of any form whatsoever must retain the following
   *    acknowledgment:
   *    "This product includes software developed by the OpenSSL Project
   *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
   *
   * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
   * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
   * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
   * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
   * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
   * OF THE POSSIBILITY OF SUCH DAMAGE.
   * ====================================================================
   *
   * This product includes cryptographic software written by Eric Young
   * (eay@cryptsoft.com).  This product includes software written by Tim
   * Hudson (tjh@cryptsoft.com). */
  
  #ifndef OPENSSL_HEADER_PKCS8_INTERNAL_H
  #define OPENSSL_HEADER_PKCS8_INTERNAL_H
  
  #include <CJWTKitBoringSSL_base.h>
  
  #if defined(__cplusplus)
  extern "C" {
  #endif
  
  
  struct pkcs8_priv_key_info_st {
    ASN1_INTEGER *version;
    X509_ALGOR *pkeyalg;
    ASN1_OCTET_STRING *pkey;
    STACK_OF(X509_ATTRIBUTE) *attributes;
  };
  
  // pkcs8_pbe_decrypt decrypts |in| using the PBE scheme described by
  // |algorithm|, which should be a serialized AlgorithmIdentifier structure. On
  // success, it sets |*out| to a newly-allocated buffer containing the decrypted
  // result and returns one. Otherwise, it returns zero.
  int pkcs8_pbe_decrypt(uint8_t **out, size_t *out_len, CBS *algorithm,
                        const char *pass, size_t pass_len, const uint8_t *in,
                        size_t in_len);
  
  #define PKCS12_KEY_ID 1
  #define PKCS12_IV_ID 2
  #define PKCS12_MAC_ID 3
  
  // pkcs12_key_gen runs the PKCS#12 key derivation function as specified in
  // RFC 7292, appendix B. On success, it writes the resulting |out_len| bytes of
  // key material to |out| and returns one. Otherwise, it returns zero. |id|
  // should be one of the |PKCS12_*_ID| values.
  int pkcs12_key_gen(const char *pass, size_t pass_len, const uint8_t *salt,
                     size_t salt_len, uint8_t id, unsigned iterations,
                     size_t out_len, uint8_t *out, const EVP_MD *md);
  
  // pkcs12_pbe_encrypt_init configures |ctx| for encrypting with a PBES1 scheme
  // defined in PKCS#12. It writes the corresponding AlgorithmIdentifier to |out|.
  int pkcs12_pbe_encrypt_init(CBB *out, EVP_CIPHER_CTX *ctx, int alg,
                              unsigned iterations, const char *pass,
                              size_t pass_len, const uint8_t *salt,
                              size_t salt_len);
  
  struct pbe_suite {
    int pbe_nid;
    uint8_t oid[10];
    uint8_t oid_len;
    const EVP_CIPHER *(*cipher_func)(void);
    const EVP_MD *(*md_func)(void);
    // decrypt_init initialize |ctx| for decrypting. The password is specified by
    // |pass| and |pass_len|. |param| contains the serialized parameters field of
    // the AlgorithmIdentifier.
    //
    // It returns one on success and zero on error.
    int (*decrypt_init)(const struct pbe_suite *suite, EVP_CIPHER_CTX *ctx,
                        const char *pass, size_t pass_len, CBS *param);
  };
  
  #define PKCS5_DEFAULT_ITERATIONS 2048
  #define PKCS5_SALT_LEN 8
  
  int PKCS5_pbe2_decrypt_init(const struct pbe_suite *suite, EVP_CIPHER_CTX *ctx,
                              const char *pass, size_t pass_len, CBS *param);
  
  // PKCS5_pbe2_encrypt_init configures |ctx| for encrypting with PKCS #5 PBES2,
  // as defined in RFC 2998, with the specified parameters. It writes the
  // corresponding AlgorithmIdentifier to |out|.
  int PKCS5_pbe2_encrypt_init(CBB *out, EVP_CIPHER_CTX *ctx,
                              const EVP_CIPHER *cipher, unsigned iterations,
                              const char *pass, size_t pass_len,
                              const uint8_t *salt, size_t salt_len);
  
  // pkcs12_iterations_acceptable returns one if |iterations| is a reasonable
  // number of PBKDF2 iterations and zero otherwise.
  int pkcs12_iterations_acceptable(uint64_t iterations);
  
  
  #if defined(__cplusplus)
  }  // extern C
  #endif
  
  #endif  // OPENSSL_HEADER_PKCS8_INTERNAL_H
  