Class Authlogic::CryptoProviders::SCrypt
In: lib/authlogic/crypto_providers/scrypt.rb
Parent: Object

If you want a stronger hashing algorithm, but would prefer not to use BCrypt, SCrypt is another option. SCrypt is newer and less popular (and so less-tested), but it‘s designed specifically to avoid a theoretical hardware attack against BCrypt. Just as with BCrypt, you are sacrificing performance relative to SHA2 algorithms, but the increased security may well be worth it. (That performance sacrifice is the exact reason it‘s much, much harder for an attacker to brute-force your paswords). Decided SCrypt is for you? Just install the bcrypt gem:

  gem install scrypt

Tell acts_as_authentic to use it:

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

Methods

Constants

DEFAULTS = {:key_len => 32, :salt_size => 8, :max_time => 0.2, :max_mem => 1024 * 1024, :max_memfrac => 0.5}

Attributes

key_len  [W] 
max_mem  [W] 
max_memfrac  [W] 
max_time  [W] 
salt_size  [W] 

Public Class methods

Creates an SCrypt hash for the password passed.

Key length - length in bytes of generated key, from 16 to 512.

Does the hash match the tokens? Uses the same tokens that were used to encrypt.

Max memory - maximum memory usage. The minimum is always 1MB

Max memory fraction - maximum memory out of all available. Always greater than zero and <= 0.5.

Max time - maximum time spent in computation

Salt size - size in bytes of random salt, from 8 to 32

[Validate]