Class: ECHConfig

Inherits:
Object
  • Object
show all
Extended by:
T::Sig
Defined in:
lib/ech_config/version.rb,
lib/ech_config.rb,
lib/ech_config.rb

Overview

typed: strict frozen_string_literal: true

Defined Under Namespace

Classes: DecodeError, ECHConfigContents, Error, UnsupportedVersion

Constant Summary collapse

VERSION = 
'0.0.3'

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(version, echconfig_contents) ⇒ ECHConfig

Returns a new instance of ECHConfig.

Raises:



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# File 'lib/ech_config.rb', line 24

def initialize(version, echconfig_contents)
  v = version.unpack1('n')
  # https://author-tools.ietf.org/iddiff?url2=draft-ietf-tls-esni-11.txt#context-3
  raise ::ECHConfig::UnsupportedVersion unless v > "\xfe\x0a".unpack1('n') && v <= "\xfe\x0d".unpack1('n')

  @version = version
  @echconfig_contents = echconfig_contents
end

Instance Attribute Details

#echconfig_contents ⇒ Object (readonly)

Returns the value of attribute echconfig_contents.



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# File 'lib/ech_config.rb', line 17

def echconfig_contents
  @echconfig_contents
end

#version ⇒ Object (readonly)

Returns the value of attribute version.



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# File 'lib/ech_config.rb', line 17

def version
  @version
end

Class Method Details

.decode_vectors(octet) ⇒ Object

Raises:



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# File 'lib/ech_config.rb', line 40

def self.decode_vectors(octet)
  i = 0
  echconfigs = []
  while i < octet.length
    raise ::ECHConfig::DecodeError if i + 4 > octet.length

    version = octet.slice(i, 2)
    raise ::ECHConfig::DecodeError if version.nil?

    length = octet.slice(i + 2, 2)&.unpack1('n')
    i += 4
    raise ::ECHConfig::DecodeError if i + length > octet.length

    echconfig_contents = ECHConfigContents.decode(octet.slice(i, length) || '')
    i += length
    echconfigs << new(version, echconfig_contents)
  end
  raise ::ECHConfig::DecodeError if i != octet.length

  echconfigs
end

Instance Method Details

#encode ⇒ Object 



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# File 'lib/ech_config.rb', line 34

def encode
  @version + @echconfig_contents.encode.then { |s| [s.length].pack('n') + s }
end