Class: TTTLS13::Message::Extension::PreSharedKey

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

Overview

NOTE:

struct {
    select (Handshake.msg_type) {
        case client_hello: OfferedPsks;
        case server_hello: uint16 selected_identity;
    };
} PreSharedKeyExtension;

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(msg_type:, offered_psks: nil, selected_identity: '') ⇒ PreSharedKey

Returns a new instance of PreSharedKey.

Parameters:

Raises:



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# File 'lib/tttls1.3/message/extension/pre_shared_key.rb', line 26

def initialize(msg_type:, offered_psks: nil, selected_identity: '')
  @extension_type = ExtensionType::PRE_SHARED_KEY
  @msg_type = msg_type
  case @msg_type
  when HandshakeType::CLIENT_HELLO
    @offered_psks = offered_psks
  when HandshakeType::SERVER_HELLO
    @selected_identity = selected_identity || ''
    raise Error::ErrorAlerts, :internal_error \
      unless @selected_identity.length == 2
  else
    raise Error::ErrorAlerts, :internal_error
  end
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/pre_shared_key.rb', line 16

def extension_type
  @extension_type
end

#msg_type ⇒ Object (readonly)

Returns the value of attribute msg_type.



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# File 'lib/tttls1.3/message/extension/pre_shared_key.rb', line 17

def msg_type
  @msg_type
end

#offered_psks ⇒ Object (readonly)

Returns the value of attribute offered_psks.



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# File 'lib/tttls1.3/message/extension/pre_shared_key.rb', line 18

def offered_psks
  @offered_psks
end

#selected_identity ⇒ Object (readonly)

Returns the value of attribute selected_identity.



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

def selected_identity
  @selected_identity
end

Class Method Details

.deserialize(binary, msg_type) ⇒ TTTLS13::Message::Extensions::PreSharedKey?

Parameters:

Returns:

  • (TTTLS13::Message::Extensions::PreSharedKey, nil)

Raises:



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# File 'lib/tttls1.3/message/extension/pre_shared_key.rb', line 64

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

  case msg_type
  when HandshakeType::CLIENT_HELLO
    offered_psks = OfferedPsks.deserialize(binary)
    return nil if offered_psks.nil?

    PreSharedKey.new(msg_type: HandshakeType::CLIENT_HELLO,
                     offered_psks: offered_psks)
  when HandshakeType::SERVER_HELLO
    return nil unless binary.length == 2

    selected_identity = binary
    PreSharedKey.new(msg_type: HandshakeType::SERVER_HELLO,
                     selected_identity: selected_identity)
  else
    raise Error::ErrorAlerts, :internal_error
  end
end

Instance Method Details

#serialize ⇒ String

Returns:

  • (String)

Raises:



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# File 'lib/tttls1.3/message/extension/pre_shared_key.rb', line 44

def serialize
  binary = ''
  case @msg_type
  when HandshakeType::CLIENT_HELLO
    binary += @offered_psks.serialize
  when HandshakeType::SERVER_HELLO
    binary += @selected_identity
  else
    raise Error::ErrorAlerts, :internal_error
  end

  @extension_type + binary.prefix_uint16_length
end