Violent Ruby: Unix Password Cracker Check Password

violent_ruby_unix_password_cracker_check_password.rb

# Check if a given encrypted password matches a given plaintext
# word when the same crytographic operation is performed on it.
#
# @example Basic Usage
#   ViolentRuby::UnixPasswordCracker.new.check_password('HX9LLTdc/jiDE', 'egg')
#   # true
# 
# @example Advanced Usage
#   ViolentRuby::UnixPasswordCracker.new.check_password('HXA82SzTqypHA', 'egg ')
#   # false
#   
#   ViolentRuby::UnixPasswordCracker.new.check_password('HXA82SzTqypHA', 'egg ', false)
#   # true
#
# @param encrypted_password [String]  The encrypted password to check against.
# @param word               [String]  The plaintext password to check against.
# @param strip              [Boolean] Strip trailing spaces and newlines from word ( default: +true+ )
#
# @return [Boolean]
def check_password(encrypted_password, word, strip = true)
  word.strip! if strip # sometimes passwords have trailing spaces!? D:
  if word.strip.crypt(encrypted_password[0, 2]) == encrypted_password
    true
  else
    false
  end
end

# Same same, but different, but still same.
alias cracked? check_password