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# frozen_string_literal: true
require 'base64'
module JWT
# Base64 encoding and decoding
# @api private
class Base64
class << self
# Encode a string with URL-safe Base64 complying with RFC 4648 (not padded).
# @api private
def url_encode(str)
::Base64.urlsafe_encode64(str, padding: false)
end
# Decode a string with URL-safe Base64 complying with RFC 4648.
# @api private
def url_decode(str)
::Base64.urlsafe_decode64(str)
rescue ArgumentError => e
raise unless e.message == 'invalid base64'
raise Base64DecodeError, 'Invalid base64 encoding'
end
end
end
end
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