Class: ECHConfig::ECHConfigContents

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

Overview

typed: true frozen_string_literal: true

Defined Under Namespace

Classes: Extensions, HpkeKeyConfig

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(key_config, maximum_name_length, public_name, extensions) ⇒ ECHConfigContents

Returns a new instance of ECHConfigContents.



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# File 'lib/ech_config/ech_config_contents.rb', line 23

def initialize(key_config,
               maximum_name_length,
               public_name,
               extensions)
  @key_config = key_config
  @maximum_name_length = maximum_name_length
  @public_name = public_name
  @extensions = extensions
end

Instance Attribute Details

#extensions ⇒ Object (readonly)

Returns the value of attribute extensions.



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# File 'lib/ech_config/ech_config_contents.rb', line 13

def extensions
  @extensions
end

#key_config ⇒ Object (readonly)

Returns the value of attribute key_config.



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# File 'lib/ech_config/ech_config_contents.rb', line 13

def key_config
  @key_config
end

#maximum_name_length ⇒ Object (readonly)

Returns the value of attribute maximum_name_length.



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# File 'lib/ech_config/ech_config_contents.rb', line 13

def maximum_name_length
  @maximum_name_length
end

#public_name ⇒ Object (readonly)

Returns the value of attribute public_name.



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# File 'lib/ech_config/ech_config_contents.rb', line 13

def public_name
  @public_name
end

Class Method Details

.decode(octet) ⇒ Object

Raises:



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# File 'lib/ech_config/ech_config_contents.rb', line 45

def self.decode(octet)
  key_config, octet = HpkeKeyConfig.decode(octet)
  raise ::ECHConfig::DecodeError if octet.nil?
  raise ::ECHConfig::DecodeError if octet.length < 2

  maximum_name_length = octet.slice(0, 1)&.unpack1('C')
  raise ::ECHConfig::DecodeError if maximum_name_length.nil?

  pn_len = octet.slice(1, 1)&.unpack1('C')
  i = 2
  raise ::ECHConfig::DecodeError if i + pn_len > octet.length

  public_name = octet.slice(i, pn_len)
  raise ::ECHConfig::DecodeError if public_name.nil?

  i += pn_len
  raise ::ECHConfig::DecodeError if i + 2 > octet.length

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

  extensions = Extensions.store(octet.slice(i, ex_len) || '')
  new(
    key_config,
    maximum_name_length,
    public_name,
    extensions
  )
end

Instance Method Details

#encode ⇒ Object 



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

def encode
  @key_config.encode \
  + [@maximum_name_length].pack('C') \
  + @public_name.then { |s| [s.length].pack('C') + s } \
  + @extensions.load.then { |s| [s.length].pack('n') + s }
end