updating authlogic not recognizing old previous passwords

Question

I was using authlogic 3.0.0 when using rails 3.2.2. Now i have updated rails version to 5.1.4. And authlogic upgraded to 4.0.1.

Now all of my previously saved passwords are not recognizing by authlogic. It says invalid password. So i have to update my password again. WHich is no desirable behavior. What changes i need to do so that my previously saved passwords work again on new authlogic version.

Any help would be appreciated.

Answer 1

Here is how i solve my issue,

User.rb

  acts_as_authentic do |c|
    c.crypto_provider = Authlogic::CryptoProviders::Sha512
  end

In version 3.4.0, the default crypto_provider was changed from Sha512 to SCrypt.

If you never set a crypto_provider and are upgrading, your passwords will break unless you set the original:

c.crypto_provider = Authlogic::CryptoProviders::Sha512

And if you want to automatically upgrade from Sha512 to SCrypt as users login:

c.transition_from_crypto_providers = [Authlogic::CryptoProviders::Sha512]
c.crypto_provider = Authlogic::CryptoProviders::SCrypt