gd/security/smp_packets.pdl

little_endian_packets

custom_field Address : 48 "hci/"

enum Code : 8 {
  PAIRING_REQUEST = 0x01,
  PAIRING_RESPONSE = 0x02,
  PAIRING_CONFIRM = 0x03,
  PAIRING_RANDOM = 0x04,
  PAIRING_FAILED = 0x05,
  ENCRYPTION_INFORMATION = 0x06,
  CENTRAL_IDENTIFICATION = 0x07,
  IDENTITY_INFORMATION = 0x08,
  IDENTITY_ADDRESS_INFORMATION = 0x09,
  SIGNING_INFORMATION = 0x0A,
  SECURITY_REQUEST = 0x0B,
  PAIRING_PUBLIC_KEY = 0x0C,
  PAIRING_DH_KEY_CHECK = 0x0D,
  PAIRING_KEYPRESS_NOTIFICATION = 0x0E,
}

packet Command {
  code : Code,
  _payload_,
}

enum IoCapability : 8 {
  DISPLAY_ONLY = 0x00,
  DISPLAY_YES_NO = 0x01,
  KEYBOARD_ONLY = 0x02,
  NO_INPUT_NO_OUTPUT = 0x03,
  KEYBOARD_DISPLAY = 0x04,
}

enum OobDataFlag : 8 {
  NOT_PRESENT = 0x00,
  PRESENT = 0x01,
}

enum BondingFlags : 2 {
  NO_BONDING = 0,
  BONDING = 1,
}

group PairingInfo {
  io_capability : IoCapability,
  oob_data_flag : OobDataFlag,
  auth_req: 8,
  maximum_encryption_key_size : 5, // 7 - 16
  _reserved_ : 3,
  initiator_key_distribution : 8,
  responder_key_distribution : 8,
}

packet PairingRequest : Command (code = PAIRING_REQUEST) {
  PairingInfo,
}

packet PairingResponse : Command (code = PAIRING_RESPONSE) {
  PairingInfo,
}

packet PairingConfirm : Command (code = PAIRING_CONFIRM) {
  confirm_value : 8[16],  // Initiating device sends Mconfirm, responding device sends Sconfirm
}

packet PairingRandom : Command (code = PAIRING_RANDOM) {
  random_value : 8[16],  // Initiating device sends Mrand, responding device sends Srand
}

enum PairingFailedReason : 8 {
  PASSKEY_ENTRY_FAILED = 0x01,
  OOB_NOT_AVAILABLE = 0x02,
  AUTHENTICATION_REQUIREMENTS = 0x03,
  CONFIRM_VALUE_FAILED = 0x04,
  PAIRING_NOT_SUPPORTED = 0x05,
  ENCRYPTION_KEY_SIZE = 0x06,
  COMMAND_NOT_SUPPORTED = 0x07,
  UNSPECIFIED_REASON = 0x08,
  REPEATED_ATTEMPTS = 0x09,
  INVALID_PARAMETERS = 0x0A,
  DHKEY_CHECK_FAILED = 0x0B,
  NUMERIC_COMPARISON_FAILED = 0x0C,
  BR_EDR_PAIRING_IN_PROGRESS = 0x0D,
  CROSS_TRANSPORT_KEY_DERIVATION_NOT_ALLOWED = 0x0E,
}

packet PairingFailed : Command (code = PAIRING_FAILED) {
  reason : PairingFailedReason,
}

packet EncryptionInformation : Command (code = ENCRYPTION_INFORMATION) {
 long_term_key : 8[16],
}

packet CentralIdentification : Command (code = CENTRAL_IDENTIFICATION) {
  ediv : 16,
  rand : 8[8],
}

packet IdentityInformation : Command (code = IDENTITY_INFORMATION) {
  identity_resolving_key : 8[16],
}

enum AddrType : 8 {
  PUBLIC = 0x00,
  STATIC_RANDOM = 0x01,
}

packet IdentityAddressInformation : Command (code = IDENTITY_ADDRESS_INFORMATION) {
  addr_type : AddrType,
  bd_addr : Address,
}

packet SigningInformation : Command (code = SIGNING_INFORMATION) {
  signature_key : 8[16],
}

packet SecurityRequest : Command (code = SECURITY_REQUEST) {
  auth_req: 8,
}

packet PairingPublicKey : Command (code = PAIRING_PUBLIC_KEY) {
  public_key_x : 8[32],
  public_key_y : 8[32],
}

packet PairingDhKeyCheck : Command (code = PAIRING_DH_KEY_CHECK) {
  dh_key_check : 8[16],
}

enum KeypressNotificationType : 8 {
  ENTRY_STARTED = 0,
  DIGIT_ENTERED = 1,
  DIGIT_ERASED = 2,
  CLEARED = 3,
  ENTRY_COMPLETED = 4,
}

packet PairingKeypressNotification : Command (code = PAIRING_KEYPRESS_NOTIFICATION) {
  notification_type : KeypressNotificationType,
}