对如何使用bcrypt-ruby感到困惑

时间:2011-06-23 05:54:54

标签: ruby-on-rails-3 bcrypt

我正在实施验证方案,并且正在使用bcrypt-ruby gem。

require 'bcrypt'

    class User < ActiveRecord::Base

      include BCrypt

      attr_accessor :password

      attr_accessible :name, :email, :password, :password_confirmation

      validates :password, :presence => true, :on => :create,
                           :confirmation => true,
                           :length => {:within => 6..12}

     before_save :encrypt_password

      def has_password?(submitted_password)
      self.encrypted_password == submitted_password # this calls a method in bcrypt    

    # File lib/bcrypt.rb, line 171
    #     def ==(secret)
    #       super(BCrypt::Engine.hash_secret(secret, @salt))
    #     end

      end

    private

      def encrypt_password

           self.encrypted_password = Password.create(password, :cost => 5)  
       end
    end

现在在控制台中我创建了一个新用户

>> user = User.create!(:name => "test", :email => "test@test.com", :password => "foobar", :password_confirmation => "foobar")

=> #<User id: 1, name: "test", email: "test@test.com", created_at: "2011-06-23 05:00:00", updated_at: "2011-06-23 05:00:00", encrypted_password: "$2a$10$I7Wy8NDMeVcNgOsE3J/ZyubiNAESyxA7Z49H4p1x5xxH...">

如果我检查密码是否有效,我会执行以下操作:

>> user.has_password?("foobar")
=> true

但如果我从数据库中获取用户,则会失败:

user = User.find(1)
user.has_password?("foobar")
=> false

为什么会发生这种情况,如何实施bcrypt才能使其发挥作用?

提前谢谢。

2 个答案:

答案 0 :(得分:0)

我的猜测是,由于encrypted_pa​​ssword作为字符串而不是BCrypt :: Password存储在数据库中,因此您不会调用BCrypt的==,而是调用String的==。您必须围绕字符串哈希值实例化密码实例。那就是我要看的地方。

答案 1 :(得分:0)

here所述,您必须使用Bcrypt的密码类才能使用==

def has_password?(submitted_password)
  Bcrypt::Password.new(self.encrypted_password) == submitted_password
end