73 lines
3.0 KiB
Ruby
73 lines
3.0 KiB
Ruby
require 'bcrypt'
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module ActiveModel
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module SecurePassword
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extend ActiveSupport::Concern
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module ClassMethods
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# Adds methods to set and authenticate against a SHA2-encrypted and salted password.
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# This mechanism requires you to have password_digest and password_salt attributes.
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#
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# Validations for presence of password, confirmation of password (using a "password_confirmation" attribute),
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# and strength of password (at least 6 chars, not "password") are automatically added.
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# You can add more validations by hand if need be.
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#
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# Example using Active Record (which automatically includes ActiveModel::SecurePassword):
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#
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# # Schema: User(name:string, password_digest:string, password_salt:string)
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# class User < ActiveRecord::Base
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# has_secure_password
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# end
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#
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# user = User.new(:name => "david", :password => "secret", :password_confirmation => "nomatch")
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# user.save # => false, password not long enough
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# user.password = "mUc3m00RsqyRe"
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# user.save # => false, confirmation doesn't match
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# user.password_confirmation = "mUc3m00RsqyRe"
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# user.save # => true
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# user.authenticate("notright") # => false
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# user.authenticate("mUc3m00RsqyRe") # => user
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# User.find_by_name("david").try(:authenticate, "notright") # => nil
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# User.find_by_name("david").try(:authenticate, "mUc3m00RsqyRe") # => user
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def has_secure_password
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attr_reader :password
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attr_accessor :password_confirmation
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attr_protected(:password_digest, :password_salt) if respond_to?(:attr_protected)
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validates_confirmation_of :password
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validates_presence_of :password_digest
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validate :password_must_be_strong
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end
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end
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module InstanceMethods
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# Returns self if the password is correct, otherwise false.
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def authenticate(unencrypted_password)
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if BCrypt::Password.new(password_digest) == (unencrypted_password + salt_for_password)
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self
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else
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false
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end
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end
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# Encrypts the password into the password_digest attribute.
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def password=(unencrypted_password)
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@password = unencrypted_password
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self.password_digest = BCrypt::Password.create(unencrypted_password + salt_for_password)
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end
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private
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def salt_for_password
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self.password_salt ||= self.object_id.to_s + rand.to_s
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end
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def password_must_be_strong
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if @password.present?
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errors.add(:password, "must be longer than 6 characters") unless @password.size > 6
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errors.add(:password, "can't be 'password'") if @password == "password"
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end
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end
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end
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end
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end |