Ruby BCrypt hash comparison not working -

i new comer ruby, apologies if question has been answered. have read other questions , still cannot figure out doing wrong.

i creating hashed passwords storing in db this:

new_user.password = bcrypt::password.create(unhashed_password) # write user database new_user.store_user 

i retrieve user db checking against inputed user name, , check password this:

# user database def self.get_user(check_user_name) db = user.open_db user = user.new user_arr = db.execute("select * user_data user_name = ?", check_user_name).first db.close # if user exists check password if user_arr.size != 0   print "enter password  : "   # password user   user_input_password_attempt = gets.chomp end # parse db user user class if password guess correct stored_password = bcrypt::password.new(user_arr[2]) if user_input_password_attempt == stored_password   @@users_logged_in += 1   user.user_id = user_arr[0]   user.user_name = user_arr[1]   user.password = user_arr[2]   return user end :no_user 

end

my problem var stored_password returning hash , != user_input_password_attempt have read ruby-doc , googled extensively

when use == calling == method defined on object on left hand side, passing right hand side argument:

a == b 

is equivalent to

a.==(b) 

depending on object call == method might receive different result. in other words:

a == b 

might or might not return different result than

b == 

while think nonsense , equality operators should transitive, symetric , reflexive bcrypt people have decided implement in way:

def ==(secret)   super(bcrypt::engine.hash_secret(secret, @salt)) end 

(taken http://bcrypt-ruby.rubyforge.org/classes/bcrypt/password.html#m000009)

this means have write:

stored_password = bcrypt::password.new(user_arr[2]) if stored_password == user_input_password_attempt   ... end 

in order call == method on password instance.