text: /* Copyright 2014 Donald Stufft and individual contributors
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   * http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  
  size_t crypto_pwhash_scryptsalsa208sha256_saltbytes(void);
  size_t crypto_pwhash_scryptsalsa208sha256_strbytes(void);
  size_t crypto_pwhash_scryptsalsa208sha256_bytes_min(void);
  size_t crypto_pwhash_scryptsalsa208sha256_bytes_max(void);
  size_t crypto_pwhash_scryptsalsa208sha256_passwd_min(void);
  size_t crypto_pwhash_scryptsalsa208sha256_passwd_max(void);
  size_t crypto_pwhash_scryptsalsa208sha256_opslimit_min(void);
  size_t crypto_pwhash_scryptsalsa208sha256_opslimit_max(void);
  size_t crypto_pwhash_scryptsalsa208sha256_memlimit_min(void);
  size_t crypto_pwhash_scryptsalsa208sha256_memlimit_max(void);
  size_t crypto_pwhash_scryptsalsa208sha256_opslimit_interactive(void);
  size_t crypto_pwhash_scryptsalsa208sha256_memlimit_interactive(void);
  size_t crypto_pwhash_scryptsalsa208sha256_opslimit_sensitive(void);
  size_t crypto_pwhash_scryptsalsa208sha256_memlimit_sensitive(void);
  
  const char *crypto_pwhash_scryptsalsa208sha256_strprefix(void);
  
  int crypto_pwhash_scryptsalsa208sha256_ll(const uint8_t * const passwd,
                                             size_t passwdlen,
                                             const uint8_t * salt,
                                             size_t saltlen,
                                             uint64_t N, uint32_t r, uint32_t p,
                                             uint8_t * buf, size_t buflen);
  
  /* #define crypto_pwhash_scryptsalsa208sha256_STRBYTES 102 */
  int crypto_pwhash_scryptsalsa208sha256_str(char out[102],
                                              const char * const passwd,
                                              unsigned long long passwdlen,
                                              unsigned long long opslimit,
                                              size_t memlimit);
  
  int crypto_pwhash_scryptsalsa208sha256_str_verify(const char str[102],
                                                     const char * const passwd,
                                                     unsigned long long passwdlen);
  
  /*
   *  argon2 bindings
   */
  
  /*
   *  general argon2 limits
   */
  
  size_t crypto_pwhash_strbytes(void);
  size_t crypto_pwhash_saltbytes(void);
  size_t crypto_pwhash_bytes_min(void);
  size_t crypto_pwhash_bytes_max(void);
  size_t crypto_pwhash_passwd_min(void);
  size_t crypto_pwhash_passwd_max(void);
  
  /*
   *  available algorithms identifiers
   */
  
  int crypto_pwhash_alg_default(void);
  int crypto_pwhash_alg_argon2i13(void);
  int crypto_pwhash_alg_argon2id13(void);
  
  /*
   *  argon2i recommended limits
   */
  
  size_t crypto_pwhash_argon2i_memlimit_interactive(void);
  size_t crypto_pwhash_argon2i_memlimit_moderate(void);
  size_t crypto_pwhash_argon2i_memlimit_sensitive(void);
  size_t crypto_pwhash_argon2i_memlimit_min(void);
  size_t crypto_pwhash_argon2i_memlimit_max(void);
  size_t crypto_pwhash_argon2i_opslimit_min(void);
  size_t crypto_pwhash_argon2i_opslimit_max(void);
  size_t crypto_pwhash_argon2i_opslimit_interactive(void);
  size_t crypto_pwhash_argon2i_opslimit_moderate(void);
  size_t crypto_pwhash_argon2i_opslimit_sensitive(void);
  
  /*
   *  argon2id recommended limits
   */
  
  size_t crypto_pwhash_argon2id_memlimit_interactive(void);
  size_t crypto_pwhash_argon2id_memlimit_moderate(void);
  size_t crypto_pwhash_argon2id_memlimit_sensitive(void);
  size_t crypto_pwhash_argon2id_memlimit_min(void);
  size_t crypto_pwhash_argon2id_memlimit_max(void);
  size_t crypto_pwhash_argon2id_opslimit_min(void);
  size_t crypto_pwhash_argon2id_opslimit_max(void);
  size_t crypto_pwhash_argon2id_opslimit_interactive(void);
  size_t crypto_pwhash_argon2id_opslimit_moderate(void);
  size_t crypto_pwhash_argon2id_opslimit_sensitive(void);
  
  /*
   *  libsodium's default argon2 algorithm recommended limits
   */
  
  size_t crypto_pwhash_memlimit_interactive(void);
  size_t crypto_pwhash_memlimit_moderate(void);
  size_t crypto_pwhash_memlimit_sensitive(void);
  size_t crypto_pwhash_memlimit_min(void);
  size_t crypto_pwhash_memlimit_max(void);
  size_t crypto_pwhash_opslimit_min(void);
  size_t crypto_pwhash_opslimit_max(void);
  size_t crypto_pwhash_opslimit_interactive(void);
  size_t crypto_pwhash_opslimit_moderate(void);
  size_t crypto_pwhash_opslimit_sensitive(void);
  
  /*
   * Modular crypt string prefix for implemented argon2 constructions
   */
  
  const char *crypto_pwhash_argon2i_strprefix(void);
  const char *crypto_pwhash_argon2id_strprefix(void);
  
  /*
   *  crypto_pwhash raw constructs
   */
  
  int crypto_pwhash(unsigned char * const out, unsigned long long outlen,
  		  const char * const passwd, unsigned long long passwdlen,
  		  const unsigned char * const salt,
  		  unsigned long long opslimit, size_t memlimit, int alg);
  
  /*
   *  #define crypto_pwhash_argon2i_STRBYTES 128U
   *  #define crypto_pwhash_STRBYTES crypto_pwhash_argon2i_STRBYTES
   */
  
  int crypto_pwhash_str_alg(char out[128],
                            const char * const passwd,
                            unsigned long long passwdlen,
                            unsigned long long opslimit,
                            size_t memlimit,
                            int alg);
  
  int crypto_pwhash_str_verify(const char str[128],
                               const char * const passwd,
                               unsigned long long passwdlen);
  
  int crypto_pwhash_str_needs_rehash(const char str[128],
                                     unsigned long long opslimit, size_t memlimit);
  