class TTTLS13::Message::Extension::PreSharedKey

NOTE:

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

Attributes

extension_type[R]
msg_type[R]
offered_psks[R]
selected_identity[R]

Public Class Methods

deserialize(binary, msg_type) click to toggle source

@param binary [String] @param msg_type [TTTLS13::Message::ContentType]

@raise [TTTLS13::Error::ErrorAlerts]

@return [TTTLS13::Message::Extensions::PreSharedKey, nil]

# 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
new(msg_type:, offered_psks: nil, selected_identity: '') click to toggle source

@param msg_type [TTTLS13::Message::ContentType] @param offered_psks [TTTLS13::Message::Extension::OfferedPsks] @param selected_identity [String]

@raise [TTTLS13::Error::ErrorAlerts]

# 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

Public Instance Methods

serialize() click to toggle source

@raise [TTTLS13::Error::ErrorAlerts]

@return [String]

# 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