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Contents
require 'digest/sha2'
require 'bcrypt'
module Challah
# Handles all encryption, hashing and comparison necessary for tokens and passwords.
class Encrypter
attr_accessor :cost, :joiner
# The number of times to hash the given password.
def cost
@cost ||= 10
end
# Used to join multiple parameters for a given encrypt command.
def joiner
@joiner ||= "|"
end
# Passwords and secure objects are encrypted (hashed) in a one-way technique. This way
# any item stored in the database can never be reversed into an actual password.
def hash(*tokens)
result = tokens.flatten.join(joiner)
cost.times { result = Digest::SHA512.hexdigest(result) }
result
end
def md5(*tokens)
Digest::MD5.hexdigest(tokens.flatten.join(joiner))
end
def encrypt(secret)
BCrypt::Password.create(secret, :cost => cost)
end
# Returns true if the the bcrypted value of a is equal to b
def compare(crypted_string, plain_string)
BCrypt::Password.new(crypted_string).is_password?(plain_string)
rescue BCrypt::Errors::InvalidHash
false
end
class << self
# Setup some pass through convenience methods that use default options
%w( hash md5 encrypt compare ).each do |f|
class_eval %Q(def #{f}(*args); new.#{f}(*args); end )
end
end
end
end
Version data entries
15 entries across 15 versions & 1 rubygems