class JWT::Base64

Base64 encoding and decoding

Public Class Methods

loose_urlsafe_decode64(str) click to toggle source
# File lib/jwt/base64.rb, line 27
def loose_urlsafe_decode64(str)
  str += '=' * (4 - str.length.modulo(4))
  ::Base64.decode64(str.tr('-_', '+/'))
end
url_decode(str) click to toggle source

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”)

# File lib/jwt/base64.rb, line 16
def url_decode(str)
  ::Base64.urlsafe_decode64(str)
rescue ArgumentError => e
  raise unless e.message == 'invalid base64'
  raise Base64DecodeError, 'Invalid base64 encoding' if JWT.configuration.strict_base64_decoding

  loose_urlsafe_decode64(str).tap do
    Deprecations.warning('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', only_if_valid: true)
  end
end
url_encode(str) click to toggle source

Encode a string with URL-safe Base64 complying with RFC 4648 (not padded).

# File lib/jwt/base64.rb, line 10
def url_encode(str)
  ::Base64.urlsafe_encode64(str, padding: false)
end