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trezor-firmware/common/protob/messages-thp.proto

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syntax = "proto2";
package hw.trezor.messages.thp;
// Sugar for easier handling in Java
option java_package = "com.satoshilabs.trezor.lib.protobuf";
option java_outer_classname = "TrezorMessageThp";
import "options.proto";
option (include_in_bitcoin_only) = true;
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/**
* Mapping between Trezor wire identifier (uint) and a Thp protobuf message
*/
enum ThpMessageType {
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reserved 0 to 999; // Values reserved by other messages, see messages.proto
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ThpMessageType_ThpCreateNewSession = 1000[(bitcoin_only)=true, (channel_in) = true];
ThpMessageType_ThpNewSession = 1001[(bitcoin_only)=true, (channel_out) = true];
ThpMessageType_ThpStartPairingRequest = 1008 [(bitcoin_only) = true, (pairing_in) = true];
ThpMessageType_ThpPairingPreparationsFinished = 1009 [(bitcoin_only) = true, (pairing_out) = true];
ThpMessageType_ThpCredentialRequest = 1010 [(bitcoin_only) = true, (pairing_in) = true];
ThpMessageType_ThpCredentialResponse = 1011 [(bitcoin_only) = true, (pairing_out) = true];
ThpMessageType_ThpEndRequest = 1012 [(bitcoin_only) = true, (pairing_in) = true];
ThpMessageType_ThpEndResponse = 1013[(bitcoin_only) = true, (pairing_out) = true];
ThpMessageType_ThpCodeEntryCommitment = 1016[(bitcoin_only)=true, (pairing_out) = true];
ThpMessageType_ThpCodeEntryChallenge = 1017[(bitcoin_only)=true, (pairing_in) = true];
ThpMessageType_ThpCodeEntryCpaceHost = 1018[(bitcoin_only)=true, (pairing_in) = true];
ThpMessageType_ThpCodeEntryCpaceTrezor = 1019[(bitcoin_only)=true, (pairing_out) = true];
ThpMessageType_ThpCodeEntryTag = 1020[(bitcoin_only)=true, (pairing_in) = true];
ThpMessageType_ThpCodeEntrySecret = 1021[(bitcoin_only)=true, (pairing_out) = true];
ThpMessageType_ThpQrCodeTag = 1024[(bitcoin_only)=true, (pairing_in) = true];
ThpMessageType_ThpQrCodeSecret = 1025[(bitcoin_only)=true, (pairing_out) = true];
ThpMessageType_ThpNfcUnidirectionalTag = 1032[(bitcoin_only)=true, (pairing_in) = true];
ThpMessageType_ThpNfcUnidirectionalSecret = 1033[(bitcoin_only)=true, (pairing_in) = true];
reserved 1100 to 2147483647; // Values reserved by other messages, see messages.proto
}
/**
* Numeric identifiers of pairing methods.
* @embed
*/
enum ThpPairingMethod {
NoMethod = 1; // Trust without MITM protection.
CodeEntry = 2; // User types code diplayed on Trezor into the host application.
QrCode = 3; // User scans code displayed on Trezor into host application.
NFC_Unidirectional = 4; // Trezor transmits an authentication key to the host device via NFC.
}
/**
* @embed
*/
message ThpDeviceProperties {
optional string internal_model = 1; // Internal model name e.g. "T2B1".
optional uint32 model_variant = 2; // Encodes the device properties such as color.
optional bool bootloader_mode = 3; // Indicates whether the device is in bootloader or firmware mode.
optional uint32 protocol_version = 4; // The communication protocol version supported by the firmware.
repeated ThpPairingMethod pairing_methods = 5; // The pairing methods supported by the Trezor.
}
/**
* @embed
*/
message ThpHandshakeCompletionReqNoisePayload {
optional bytes host_pairing_credential = 1; // Host's pairing credential
repeated ThpPairingMethod pairing_methods = 2; // The pairing methods chosen by the host
}
/**
* Request: Ask device for a new session with given passphrase.
* @start
* @next ThpNewSession
*/
message ThpCreateNewSession{
optional string passphrase = 1;
optional bool on_device = 2; // User wants to enter passphrase on the device
optional bool derive_cardano = 3; // If True, Cardano keys will be derived. Ignored with BTC-only
}
/**
* Response: Contains session_id of the newly created session.
* @end
*/
message ThpNewSession{
optional uint32 new_session_id = 1;
}
/**
* Request: Start pairing process.
* @start
* @next ThpCodeEntryCommitment
* @next ThpPairingPreparationsFinished
*/
message ThpStartPairingRequest{
optional string host_name = 1; // Human-readable host name
}
/**
* Response: Pairing is ready for user input / OOB communication.
* @next ThpCodeEntryCpace
* @next ThpQrCodeTag
* @next ThpNfcUnidirectionalTag
*/
message ThpPairingPreparationsFinished{
}
/**
* Response: If Code Entry is an allowed pairing option, Trezor responds with a commitment.
* @next ThpCodeEntryChallenge
*/
message ThpCodeEntryCommitment {
optional bytes commitment = 1; // SHA-256 of Trezor's random 32-byte secret
}
/**
* Response: Host responds to Trezor's Code Entry commitment with a challenge.
* @next ThpPairingPreparationsFinished
*/
message ThpCodeEntryChallenge {
optional bytes challenge = 1; // host's random 32-byte challenge
}
/**
* Request: User selected Code Entry option in Host. Host starts CPACE protocol with Trezor.
* @next ThpCodeEntryCpaceTrezor
*/
message ThpCodeEntryCpaceHost {
optional bytes cpace_host_public_key = 1; // Host's ephemeral CPace public key
}
/**
* Response: Trezor continues with the CPACE protocol.
* @next ThpCodeEntryTag
*/
message ThpCodeEntryCpaceTrezor {
optional bytes cpace_trezor_public_key = 1; // Trezor's ephemeral CPace public key
}
/**
* Response: Host continues with the CPACE protocol.
* @next ThpCodeEntrySecret
*/
message ThpCodeEntryTag {
optional bytes tag = 2; // SHA-256 of shared secret
}
/**
* Response: Trezor finishes the CPACE protocol.
* @next ThpCredentialRequest
* @next ThpEndRequest
*/
message ThpCodeEntrySecret {
optional bytes secret = 1; // Trezor's secret
}
/**
* Request: User selected QR Code pairing option. Host sends a QR Tag.
* @next ThpQrCodeSecret
*/
message ThpQrCodeTag {
optional bytes tag = 1; // SHA-256 of shared secret
}
/**
* Response: Trezor sends the QR secret.
* @next ThpCredentialRequest
* @next ThpEndRequest
*/
message ThpQrCodeSecret {
optional bytes secret = 1; // Trezor's secret
}
/**
* Request: User selected Unidirectional NFC pairing option. Host sends an Unidirectional NFC Tag.
* @next ThpNfcUnidirectionalSecret
*/
message ThpNfcUnidirectionalTag {
optional bytes tag = 1; // SHA-256 of shared secret
}
/**
* Response: Trezor sends the Unidirectioal NFC secret.
* @next ThpCredentialRequest
* @next ThpEndRequest
*/
message ThpNfcUnidirectionalSecret {
optional bytes secret = 1; // Trezor's secret
}
/**
* Request: Host requests issuance of a new pairing credential.
* @start
* @next ThpCredentialResponse
*/
message ThpCredentialRequest {
optional bytes host_static_pubkey = 1; // Host's static public key used in the handshake.
}
/**
* Response: Trezor issues a new pairing credential.
* @next ThpCredentialRequest
* @next ThpEndRequest
*/
message ThpCredentialResponse {
optional bytes trezor_static_pubkey = 1; // Trezor's static public key used in the handshake.
optional bytes credential = 2; // The pairing credential issued by the Trezor to the host.
}
/**
* Request: Host requests transition to the encrypted traffic phase.
* @start
* @next ThpEndResponse
*/
message ThpEndRequest {}
/**
* Response: Trezor approves transition to the encrypted traffic phase
* @end
*/
message ThpEndResponse {}
/**
* Only for internal use.
* @embed
*/
message ThpCredentialMetadata {
option (internal_only) = true;
optional string host_name = 1; // Human-readable host name
}
/**
* Only for internal use.
* @embed
*/
message ThpPairingCredential {
option (internal_only) = true;
optional ThpCredentialMetadata cred_metadata = 1; // Credential metadata
optional bytes mac = 2; // Message authentication code generated by the Trezor
}
/**
* Only for internal use.
* @embed
*/
message ThpAuthenticatedCredentialData {
option (internal_only) = true;
optional bytes host_static_pubkey = 1; // Host's static public key used in the handshake
optional ThpCredentialMetadata cred_metadata = 2; // Credential metadata
}