class JWT::Decode

def allowed_algorithms
  # Order is very important - first check for string keys, next for symbols
  algos = if @options.key?('algorithm')
    @options['algorithm']
  elsif @options.key?(:algorithm)
    @options[:algorithm]
  elsif @options.key?('algorithms')
    @options['algorithms']
  elsif @options.key?(:algorithms)
    @options[:algorithms]
  else
    []
  end
  Array(algos)
end