General structure
The general structure of commands and responses is as follows:
Commands
Field | Type | Content | Note |
---|
CLA | byte (1) | Application Identifier | 0x91 |
INS | byte (1) | Instruction ID | |
P1 | byte (1) | Parameter 1 | |
P2 | byte (1) | Parameter 2 | |
L | byte (1) | Bytes in payload | |
PAYLOAD | byte (L) | Payload | |
Response
Field | Type | Content | Note |
---|
ANSWER | byte (?) | Answer | depends on the command |
SW1-SW2 | byte (2) | Return code | see list of return codes |
Return codes
Return code | Description |
---|
0x6400 | Execution Error |
0x6700 | Wrong buffer length |
0x6982 | Empty buffer |
0x6983 | Output buffer too small |
0x6984 | Data is invalid |
0x6986 | Command not allowed |
0x6987 | Tx is not initialized |
0x6B00 | P1/P2 are invalid |
0x6D00 | INS not supported |
0x6E00 | CLA not supported |
0x6F00 | Unknown |
0x6F01 | Sign / verify error |
0x9000 | Success |
Command definition
GET_DEVICE_INFO
Command
Field | Type | Content | Expected |
---|
CLA | byte (1) | Application Identifier | 0xE0 |
INS | byte (1) | Instruction ID | 0x01 |
P1 | byte (1) | Parameter 1 | 0x00 |
P2 | byte (1) | Parameter 2 | 0x00 |
L | byte (1) | Bytes in payload | 0x00 |
Response
Field | Type | Content | Note |
---|
TARGET_ID | byte (4) | Target Id | |
OS_LEN | byte (1) | OS version length | 0..64 |
OS | byte (?) | OS version | Non terminated string |
FLAGS_LEN | byte (1) | Flags length | 0 |
MCU_LEN | byte (1) | MCU version length | 0..64 |
MCU | byte (?) | MCU version | Non terminated string |
SW1-SW2 | byte (2) | Return code | see list of return codes |
GET_VERSION
Command
Field | Type | Content | Expected |
---|
CLA | byte (1) | Application Identifier | 0x91 |
INS | byte (1) | Instruction ID | 0x00 |
P1 | byte (1) | Parameter 1 | ignored |
P2 | byte (1) | Parameter 2 | ignored |
L | byte (1) | Bytes in payload | 0 |
Response
Field | Type | Content | Note |
---|
TEST | byte (1) | Test Mode | 0x01 means test mode is enabled |
MAJOR | byte (2) | Version Major | 0..65535 |
MINOR | byte (2) | Version Minor | 0..65535 |
PATCH | byte (2) | Version Patch | 0..65535 |
LOCKED | byte (1) | Device is locked | It'll always be 0 |
TARGET_ID | byte (4) | Target Id | |
SW1-SW2 | byte (2) | Return code | see list of return codes |
INS_GET_ADDR
Command
Field | Type | Content | Expected |
---|
CLA | byte (1) | Application Identifier | 0x91 |
INS | byte (1) | Instruction ID | 0x01 |
P1 | byte (1) | Request User confirmation | No = 0 |
P2 | byte (1) | Signature scheme | Ed25519 = 0 |
| | | Sr25519 = 1 |
L | byte (1) | Bytes in payload | (depends) |
Path[0] | byte (4) | Derivation Path Data | 0x80000000 | 44 |
Path[1] | byte (4) | Derivation Path Data | 0x80000000 | 595 |
Path[2] | byte (4) | Derivation Path Data | ? |
Path[3] | byte (4) | Derivation Path Data | ? |
Path[4] | byte (4) | Derivation Path Data | ? |
Response
Field | Type | Content | Note |
---|
PK | byte (32) | Public Key | |
ADDR | byte (??) | address | |
SW1-SW2 | byte (2) | Return code | see list of return codes |
INS_SIGN
Command
Field | Type | Content | Expected |
---|
CLA | byte (1) | Application Identifier | 0x91 |
INS | byte (1) | Instruction ID | 0x02 |
P1 | byte (1) | Payload desc | 0 = init |
| | | 1 = add |
| | | 2 = last |
P2 | byte (1) | Signature scheme | Ed25519 = 0 |
| | | Sr25519 = 1 |
L | byte (1) | Bytes in payload | (depends) |
The first packet/chunk includes only the derivation path
All other packets/chunks contain data chunks that are described below
First Packet
Field | Type | Content | Expected |
---|
Path[0] | byte (4) | Derivation Path Data | 0x80000000 | 44 |
Path[1] | byte (4) | Derivation Path Data | 0x80000000 | 595 |
Path[2] | byte (4) | Derivation Path Data | ? |
Path[3] | byte (4) | Derivation Path Data | ? |
Path[4] | byte (4) | Derivation Path Data | ? |
Other Chunks/Packets
Field | Type | Content | Expected |
---|
Message | bytes... | Message to Sign | |
Response
Field | Type | Content | Note |
---|
SIG | byte (65) | Signature | |
SW1-SW2 | byte (2) | Return code | see list of return codes |
INS_SIGN_RAW
Command
Field | Type | Content | Expected |
---|
CLA | byte (1) | Application Identifier | 0x91 |
INS | byte (1) | Instruction ID | 0x03 |
P1 | byte (1) | Payload desc | 0 = init |
| | | 1 = add |
| | | 2 = last |
P2 | byte (1) | Signature scheme | Ed25519 = 0 |
| | | Sr25519 = 1 |
L | byte (1) | Bytes in payload | (depends) |
The first packet/chunk includes only the derivation path
All other packets/chunks contain data chunks that are described below
First Packet
Field | Type | Content | Expected |
---|
Path[0] | byte (4) | Derivation Path Data | 0x80000000 | 44 |
Path[1] | byte (4) | Derivation Path Data | 0x80000000 | 595 |
Path[2] | byte (4) | Derivation Path Data | ? |
Path[3] | byte (4) | Derivation Path Data | ? |
Path[4] | byte (4) | Derivation Path Data | ? |
Other Chunks/Packets
Field | Type | Content | Expected |
---|
Message | bytes... | Message to Sign | |
Response
Field | Type | Content | Note |
---|
SIG | byte (65) | Signature | |
SW1-SW2 | byte (2) | Return code | see list of return codes |