Ruby BCrypt example

bcrypt_example.rb

require 'bcrypt'
require 'pp'

secret = 'my password'

BCrypt::Engine.cost = 4  # default is 10
password       = BCrypt::Password.create(secret)

puts '********** create **********'
puts ['version:', password.version].join(' ')
puts ['cost:', password.cost].join(' ')
puts ['salt:', password.salt].join(' ')
puts ['checksum:', password.checksum].join(' ')

# this is actually comparing the password hash, and not the password string itself.
# alias_method: BCrypt::Password#is_password?(secret)
pp password == secret

puts '********** read **********'
# with the password and the salt, this .hash_secret return the password hash
# same as BCrypt::Password#to_s
hash_secret = BCrypt::Engine.hash_secret(secret, password.salt)
puts ['Hash Secret:', hash_secret].join(' ')
password = BCrypt::Password.new(hash_secret)
pp password == secret