text: /*
  * Bcrypt Password Hashing
  * (C) 2011 Jack Lloyd
  *
  * Botan is released under the Simplified BSD License (see license.txt)
  */
  
  #ifndef BOTAN_BCRYPT_H_
  #define BOTAN_BCRYPT_H_
  
  #include <botan/types.h>
  #include <string>
  
  namespace Botan {
  
  class RandomNumberGenerator;
  
  /**
  * Create a password hash using Bcrypt
  *
  * @warning The password is truncated at at most 72 characters; characters after
  *          that do not have any effect on the resulting hash. To support longer
  *          passwords, consider pre-hashing the password, for example by using
  *          the hex encoding of SHA-256 of the password as the input to bcrypt.
  *
  * @param password the password.
  * @param rng a random number generator
  * @param work_factor how much work to do to slow down guessing attacks
  * @param version which version to emit (may be 'a', 'b', or 'y' all of which
  *        have identical behavior in this implementation).
  *
  * @see https://www.usenix.org/events/usenix99/provos/provos_html/
  */
  std::string BOTAN_PUBLIC_API(2,0) generate_bcrypt(const std::string& password,
                                                    RandomNumberGenerator& rng,
                                                    uint16_t work_factor = 12,
                                                    char version = 'a');
  
  /**
  * Check a previously created password hash
  * @param password the password to check against
  * @param hash the stored hash to check against
  */
  bool BOTAN_PUBLIC_API(2,0) check_bcrypt(const std::string& password,
                                          const std::string& hash);
  
  }
  
  #endif
  