Class: TTTLS13::Message::Extension::Alpn

Inherits:
Object
  • Object
show all
Defined in:
lib/tttls1.3/message/extension/alpn.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(protocol_name_list) ⇒ Alpn

www.iana.org/assignments/tls-extensiontype-values/tls-extensiontype-values.xhtml#alpn-protocol-ids

Examples:

Alpn.new(['h2', 'http/1.1'])

Parameters:

  • protocol_name_list (Array) —

    Array of String

Raises:



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# File 'lib/tttls1.3/message/extension/alpn.rb', line 19

def initialize(protocol_name_list)
  @extension_type \
    = ExtensionType::APPLICATION_LAYER_PROTOCOL_NEGOTIATION
  @protocol_name_list = protocol_name_list || []
  raise Error::ErrorAlerts, :internal_error \
    if @protocol_name_list.empty?
end

Instance Attribute Details

#extension_type ⇒ Object (readonly)

Returns the value of attribute extension_type.



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# File 'lib/tttls1.3/message/extension/alpn.rb', line 9

def extension_type
  @extension_type
end

#protocol_name_list ⇒ Object (readonly)

Returns the value of attribute protocol_name_list.



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# File 'lib/tttls1.3/message/extension/alpn.rb', line 9

def protocol_name_list
  @protocol_name_list
end

Class Method Details

.deserialize(binary) ⇒ TTTLS13::Message::Extension::Alpn?

Parameters:

  • binary (String)

Returns:

Raises:



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# File 'lib/tttls1.3/message/extension/alpn.rb', line 41

def self.deserialize(binary)
  raise Error::ErrorAlerts, :internal_error if binary.nil?

  return nil if binary.length < 2

  pnlist_len = Convert.bin2i(binary.slice(0, 2))
  i = 2
  protocol_name_list = []
  while i < pnlist_len + 2
    return nil if i + 1 > binary.length

    pn_len = Convert.bin2i(binary.slice(i, 1))
    i += 1
    return nil if i + pn_len > binary.length

    protocol_name_list << binary.slice(i, pn_len)
    i += pn_len
  end
  return nil unless i == binary.length &&
                    pnlist_len + 2 == binary.length

  Alpn.new(protocol_name_list)
end

Instance Method Details

#serialize ⇒ String

Returns:

  • (String) 


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# File 'lib/tttls1.3/message/extension/alpn.rb', line 28

def serialize
  binary = @protocol_name_list.map(&:prefix_uint8_length)
                              .join
                              .prefix_uint16_length

  @extension_type + binary.prefix_uint16_length
end