General structure
The general structure of commands and responses is as follows:
Commands
| Field | Type | Content | Note |
|---|
| CLA | byte (1) | Application Identifier | 0xa6 |
| 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 |
| 0x6982 | Empty buffer |
| 0x6983 | Output buffer too small |
| 0x6986 | Command not allowed |
| 0x6D00 | INS not supported |
| 0x6E00 | CLA not supported |
| 0x6F00 | Unknown |
| 0x9000 | Success |
Command definition
GET_VERSION
Command
| Field | Type | Content | Expected |
|---|
| CLA | byte (1) | Application Identifier | 0xa6 |
| 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 | 0xFF 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 | |
| SW1-SW2 | byte (2) | Return code | see list of return codes |
INS_GET_ADDR_ED25519
Command
| Field | Type | Content | Expected | |
|---|
| CLA | byte (1) | Application Identifier | 0xa6 | |
| INS | byte (1) | Instruction ID | 0x01 | |
| P1 | byte (1) | Request User confirmation | No = 0 | |
| P2 | byte (1) | Parameter 2 | ignored | |
| L | byte (1) | Bytes in payload | (depends) | |
| Path[0] | byte (4) | Derivation Path Data | 0x80000000 | 44 |
| Path[1] | byte (4) | Derivation Path Data | 0x80000000 | 354 |
| 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_GET_ADDR_SR25519
Command
| Field | Type | Content | Expected | |
|---|
| CLA | byte (1) | Application Identifier | 0xa6 | |
| INS | byte (1) | Instruction ID | 0x11 | |
| P1 | byte (1) | Request User confirmation | No = 0 | |
| P2 | byte (1) | Parameter 2 | ignored | |
| L | byte (1) | Bytes in payload | (depends) | |
| Path[0] | byte (4) | Derivation Path Data | 0x80000000 | 44 |
| Path[1] | byte (4) | Derivation Path Data | 0x80000000 | 354 |
| 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 (??) | DOT address | |
| SW1-SW2 | byte (2) | Return code | see list of return codes |
INS_SIGN_ED25519
Command
| Field | Type | Content | Expected |
|---|
| CLA | byte (1) | Application Identifier | 0xa6 |
| INS | byte (1) | Instruction ID | 0x02 |
| P1 | byte (1) | Payload desc | 0 = init |
| | | 1 = add |
| | | 2 = last |
| P2 | byte (1) | ---- | not used |
| 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 | 44 |
| Path[1] | byte (4) | Derivation Path Data | 354 |
| 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_SR25519
Command
| Field | Type | Content | Expected |
|---|
| CLA | byte (1) | Application Identifier | 0xa6 |
| INS | byte (1) | Instruction ID | 0x12 |
| P1 | byte (1) | Payload desc | 0 = init |
| | | 1 = add |
| | | 2 = last |
| P2 | byte (1) | ---- | not used |
| 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 | 44 |
| Path[1] | byte (4) | Derivation Path Data | 354 |
| 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 |
