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# frozen_string_literal: true
require "base64"
module WebAuthn
def self.standard_encoder
@standard_encoder ||= Encoder.new
end
class Encoder
# https://www.w3.org/TR/webauthn-2/#base64url-encoding
STANDARD_ENCODING = :base64url
attr_reader :encoding
def initialize(encoding = STANDARD_ENCODING)
@encoding = encoding
end
def encode(data)
case encoding
when :base64
Base64.strict_encode64(data)
when :base64url
Base64.urlsafe_encode64(data, padding: false)
when nil, false
data
else
raise "Unsupported or unknown encoding: #{encoding}"
end
end
def decode(data)
case encoding
when :base64
Base64.strict_decode64(data)
when :base64url
Base64.urlsafe_decode64(data)
when nil, false
data
else
raise "Unsupported or unknown encoding: #{encoding}"
end
end
end
end
|
