Contents

# frozen_string_literal: true

require 'base64'

module JWT
  # Base64 encoding and decoding
  class Base64
    class << self
      # Encode a string with URL-safe Base64 complying with RFC 4648 (not padded).
      def url_encode(str)
        ::Base64.urlsafe_encode64(str, padding: false)
      end

      # Decode a string with URL-safe Base64 complying with RFC 4648.
      # Deprecated support for RFC 2045 remains for now. ("All line breaks or other characters not found in Table 1 must be ignored by decoding software")
      def url_decode(str)
        ::Base64.urlsafe_decode64(str)
      rescue ArgumentError => e
        raise unless e.message == 'invalid base64'

        warn('[DEPRECATION] Invalid base64 input detected, could be because of invalid padding, trailing whitespaces or newline chars. Graceful handling of invalid input will be dropped in the next major version of ruby-jwt')
        loose_urlsafe_decode64(str)
      end

      def loose_urlsafe_decode64(str)
        str += '=' * (4 - str.length.modulo(4))
        ::Base64.decode64(str.tr('-_', '+/'))
      end
    end
  end
end

Version data entries

1 entries across 1 versions & 1 rubygems

Version	Path
jwt-2.8.0	lib/jwt/base64.rb